DANE |
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OBLICZENIA |
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WYNIKI |
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Zaprojektować przekładnię redukcyjną napędzaną silnikiem |
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elektrycznym. Przekładnia napędza obrabiarkę. |
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Wykonać: |
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1. Kompletne obliczenia. |
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2. Rysunek zestawieniowy w skali 1:1. |
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3. Dobrać samodzielnie materiały. |
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4. Rysunki detali. |
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Schemat kinematyczny: |
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ROZWIĄZANIE |
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1.Obliczam wstępnie przełożenia kół. |
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Moc silnika: |
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N [kW] = |
7 |
Dobieram przełożenia dla kolejnych par kół odpowiednio: |
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Przełożenie: |
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i =1: |
15 |
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iI = 1: |
2,5 |
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iI = 1: |
2,5 |
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Obroty wejścia: |
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iII = 1: |
2,5 |
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iII = 1: |
2,5 |
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n[1/min]= |
3300 |
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iIII = 1: |
2,4 |
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iIII = 1: |
2,4 |
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Teoretyczne przełożenie całkowite: |
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ic = 1: |
15 |
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ic = 1: |
15 |
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Dobieram ilości zębów na współpracujących kołach: |
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koło A z= |
18 |
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koło A z= |
18 |
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koło B z= |
45 |
koło B z= |
45 |
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koło C z= |
20 |
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koło D z= |
50 |
koło C z= |
20 |
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koło E z= |
20 |
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koło F z= |
48 |
koło D z= |
50 |
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koło E z= |
20 |
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koło F z= |
48 |
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Przełożenie rzeczywiste: |
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ir = 1: |
15 |
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ir = 1: |
15 |
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Obliczam prędkości obrotowe poszczególnych wałków |
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koło A z= |
18 |
w/g wzoru: |
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koło B z= |
45 |
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koło C z= |
20 |
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koło D z= |
50 |
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koło E z= |
20 |
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koło F z= |
48 |
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nI[1/min]= |
3300 |
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nII[1/min]= |
1320 |
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nII[1/min]= |
1320 |
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nIII[1/min]= |
528 |
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nIII[1/min]= |
528 |
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nIV[1/min]= |
220 |
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nIV[1/min]= |
220 |
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Korzystając ze wzoru : |
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nI[1/min]= |
3300 |
obliczam prędkości kątowe wałków: |
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nII[1/min]= |
1320 |
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wI[1/s]= |
345,58 |
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nIII[1/min]= |
528 |
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wII[1/s]= |
138,23 |
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wII[1/s]= |
138,23 |
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nIV[1/min]= |
220 |
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wIII[1/s]= |
55,29 |
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wIII[1/s]= |
55,29 |
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wIV[1/s]= |
23,04 |
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wIV[1/s]= |
23,04 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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2. Obliczenia wytrzymałościowe kół. |
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I. Para pierwsza - koła stożkowe. |
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Dobieram na koła materiał o dopuszczalnej wytrzymałości |
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na zginanie (obciążenie zmienne jednostronne) |
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kgj [MPa]= |
310 |
16HG |
w/g tabeli IX/17. Ochęd. |
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kgj [MPa]= |
310 |
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Dla koła małego przyjąłem ilość zębów ZA= |
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18 |
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Kąt S między osiami kół wynosi S=90o. |
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Z tabeli IV/2. |
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dobieram kąty stożków podziałowych: |
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Dla koła dużego dB[o]= |
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68,12 |
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68,2 |
dB[o]= |
68,12 |
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Dla koła małego dA[o]= |
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21,48 |
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21,8 |
dA[o]= |
21,48 |
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Na podstawie wzoru IV/36 obliczam zastępcze liczby |
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zębów: |
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dA[o]= |
21,48 |
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19,39 |
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ZvA= |
19,39 |
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ZA= |
18 |
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#DIV/0! |
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dB[o]= |
68,12 |
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121,17 |
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ZvB= |
121,17 |
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ZB= |
45 |
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#REF! |
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Dla znanej zastępczej liczby zębów koła małego dobieram |
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z tabeli X/1 |
w/g Czasownikowa współczynnik wytrzymałości |
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zęba u podstawy: |
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lzast= |
0,387 |
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lzast= |
0,387 |
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N [kW] = |
7 |
Mając wszystkie dane obliczam moduł koła małego w/g |
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dA= |
21,48 |
wzoru XI-10 dla zębów prostych: |
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bm= |
0 |
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Cb= |
1 |
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lzast= |
0,387 |
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ZvA= |
19,39 |
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1,166 |
mnm= |
1,166 |
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nI[1/min]= |
3300 |
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kgj [MPa]= |
310 |
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Dobieram znormalizowany czołowy moduł zewnętrzny |
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mte[mm]= |
2,5 |
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mte[mm]= |
2,5 |
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Obliczam okrąg zewnętrznej podstawy stożka podziałowe- |
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go w/g wzoru IV-1 |
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ZA= |
18 |
Dla koła małego: |
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45 |
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deA= |
45 |
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ZB= |
45 |
Dla koła dużego: |
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112,5 |
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deB= |
112,5 |
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Długość tworzącej stożków podziałowych w/g wzoru IV-7a |
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ZA= |
18 |
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mte[mm]= |
2,5 |
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60,59 |
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Re= |
60,59 |
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dA= |
21,48 |
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Sprawdzam graniczną liczbę zębów w/g wzoruIV-37. |
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Zakładam dla zębów prostych współczynnik wysokości zę- |
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ba ytm= |
1 |
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ytm= |
1 |
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ytm= |
1 |
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atm[o]= |
20 |
17,1 |
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Zgtm= |
17,1 |
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Zatem korekcja jest zbędna. |
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Obliczam wysokość głów i stóp zębów niekorygowanych |
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[IV-20, IV-21]dla czoła zewnętrznego wieńca: |
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ytm= |
1 |
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mte[mm]= |
2,5 |
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2,5 |
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ham[mm]= |
2,5 |
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3 |
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hfm[mm]= |
3 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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deA[mm]= |
45 |
Średnice wierzchołkowe [IV-32]: |
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deB[mm]= |
112,5 |
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ham[mm]= |
2,5 |
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49,64 |
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daeA[mm]= |
49,64 |
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hfm[mm]= |
3 |
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114,36 |
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daeB[mm]= |
114,36 |
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dB[o]= |
68,12 |
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dA[o]= |
21,48 |
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Wysokości stożków wierzchołkowych [IV-33] |
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deA[mm]= |
45 |
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deB[mm]= |
112,5 |
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55,32 |
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BB= |
20,18 |
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ham[mm]= |
2,5 |
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hfm[mm]= |
3 |
20,18 |
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BA= |
55,32 |
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dB[o]= |
68,12 |
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dA[o]= |
21,48 |
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Kąty wysokości głowy zęba [IV-25]: |
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Re= |
60,59 |
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ham[mm]= |
2,5 |
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0,041260934147549 |
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tgQa= |
0,041260934147549 |
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2,36 |
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Qa[o]= |
2,22 |
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oraz stopy zęba [IV-26]: |
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Re= |
60,59 |
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hfm[mm]= |
3 |
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0,049513120977059 |
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tgQf= |
0,049513120977059 |
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2,84 |
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Qf[o]= |
2,5 |
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Kąty stożków wierzchołkowych [IV-27]: |
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Qa[o]= |
2,22 |
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Qf[o]= |
2,5 |
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24,1 |
24,16 |
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daA[o]= |
24,1 |
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dB[o]= |
68,12 |
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dA[o]= |
21,48 |
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70,34 |
70,56 |
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daB[o]= |
70,34 |
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i dna wrębów [IV-28]: |
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Qa[o]= |
2,22 |
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Qf[o]= |
2,5 |
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18,58 |
18,97 |
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dfA[o]= |
18,58 |
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dB[o]= |
68,12 |
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dA[o]= |
21,48 |
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65,22 |
65,37 |
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dfB[o]= |
65,22 |
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Dobieram szerokość wieńca około b=1/3,5 Re: |
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b[mm]= |
17 |
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b[mm]= |
17 |
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Obliczanie zębów na naciski. |
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Dla potrzeb wzorów Hertza obliczam średnicę zastępczą |
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zębnika [XI-12] |
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bm= |
0 |
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dmA= |
38,687077075425 |
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|
41,67 |
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dvmnA= |
41,67 |
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dA[o]= |
21,48 |
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oraz przełożenie czołowe [IV-9]: |
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ZA= |
18 |
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ZB= |
45 |
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0,16 |
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iv= |
0,16 |
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dobrałem |
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Przyjmuję materiałowy współczynnik Cm,a= |
478,2 |
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z tablic:X-8, X/10, |
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Dopuszczalny nacisk jednostkowy w/g Hertza [X-25]: |
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X/11, IX-48 |
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ZHj[MPa]= |
1600 |
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kH[Mpa]= |
1322 |
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Co= |
1 |
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|
1322 |
MPa |
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CcH= |
1 |
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xzH= |
1,21 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Ze wzoru Hertza obliczam największą moc jaka może |
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być przeniesiona: |
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Z tablicy I-55 wyznaczam stopnie pokrycia kół: |
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eA= |
1,53 |
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eA= |
1,53 |
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eB= |
1,73 |
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eB= |
1,73 |
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Zatem ze wzoru I-55: |
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eA= |
1,53 |
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eB= |
1,73 |
|
1,63 |
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ea= |
1,63 |
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Cm,a= |
478,2 |
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nI[1/min]= |
3300 |
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kH[Mpa]= |
1322 |
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ea= |
1,63 |
57,38 |
N[kW]= |
57,38 |
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b[mm]= |
17 |
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dvmnA= |
41,67 |
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bm= |
0 |
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iv= |
0,16 |
Warunek Hertza jest spełniony. |
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Prędkość obwodowa dla ustalenia nadwyżki dynamicznej: |
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dmA= |
38,687077075425 |
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nI[1/min]= |
3300 |
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6,68 |
m/s |
n[m/s]= |
6,68 |
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Wartość współczynnika nadwyżek dynamicznych Cd |
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n[m/s]= |
6,68 |
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|
2,29 |
IX/13-V |
Cd= |
2,29 |
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Z tablicy IX/11 odczytuję współczynnik przeciążenia Cp |
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Cp= |
1,5 |
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Cp= |
1,5 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Ze wzoru IX-9 wyznaczam siłę statyczną: |
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N[kW]= |
7 |
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n[m/s]= |
6,68 |
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1047,9 |
[N] |
Pstat[N]= |
1047,9 |
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Pstat[N]= |
1047,9 |
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Cd= |
2,29 |
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|
3599,54 |
[N] |
Pzast[N]= |
3599,54 |
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Cp= |
1,5 |
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Siła obliczeniowa [IX-13]: |
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Pzast[N]= |
3599,54 |
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ea= |
1,63 |
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2208,31 |
[N] |
Pobl[N]= |
2208,31 |
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Sprawdzam naprężenia: |
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Pobl[N]= |
2208,31 |
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l= |
0,387 |
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sgzast[MPa]= |
134,26 |
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b[mm]= |
17 |
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|
134,26 |
<kgj[MPa]= |
310 |
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m= |
2,5 |
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II. Para kół CD- koła walcowe o zębach prostych. |
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materiał |
16HG |
Na materiał dobieram stal jak dla kół stożkowych |
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kgj [MPa]= |
310 |
kgj [MPa]= |
310 |
16HG |
w/g tabeli IX/17. Ochęd. |
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kgj [MPa]= |
310 |
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Przyjmuję szerokość wieńca y= |
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20 |
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y= |
20 |
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Dla znanej zastępczej liczby zębów koła małego dobieram |
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|
z tabeli X/1 |
w/g Czasownikowa współczynnik wytrzymałości |
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zęba u podstawy: |
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l= |
0,387 |
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l= |
0,387 |
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kgj [MPa]= |
310 |
Obliczam minimalny moduł [X-4]: |
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N[kW]= |
7 |
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y= |
20 |
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l= |
0,387 |
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|
1,28 |
mm |
mo= |
1,28 |
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nII[1/min]= |
1320 |
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ZC= |
20 |
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Dobieram moduł czołowy m= |
2,5 |
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m= |
2,5 |
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Średnice podziałowe kół : |
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ZC= |
20 |
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|
50 |
[mm] |
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dC= |
50 |
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ZD= |
50 |
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|
125 |
[mm] |
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dD= |
125 |
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m= |
2,5 |
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Średnice głów zębów: |
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dC= |
50 |
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|
55 |
[mm] |
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dD= |
125 |
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daC= |
55 |
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y= |
1 |
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|
130 |
[mm] |
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daD= |
130 |
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m= |
2,5 |
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Średnice stóp zębów: |
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c= |
0,2*m |
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dC= |
50 |
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44 |
[mm] |
dfC= |
44 |
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dD= |
125 |
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y= |
1 |
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|
119 |
[mm] |
dfD= |
119 |
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m= |
2,5 |
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y= |
20 |
Szerokość wieńca: |
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m= |
2,5 |
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|
50 |
[mm] |
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b[mm]= |
50 |
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Prędkość obwodowa dla ustalenia nadwyżki dynamicznej: |
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dC= |
50 |
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nII= |
1320 |
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|
3,46 |
m/s |
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n= |
3,46 |
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Wartość współczynnika nadwyżek dynamicznych Cd |
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n= |
3,46 |
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|
1,93 |
IX/13-V |
Cd= |
1,93 |
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Z tablicy IX/11 odczytuję współczynnik przeciążenia Cp |
|
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Cp= |
1,5 |
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Cp= |
1,5 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Ze wzoru IX-9 wyznaczam siłę statyczną: |
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N[kW]= |
7 |
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|
2023,12 |
[N] |
Pstat= |
2023,12 |
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5856,93 |
[N] |
Pzast= |
5856,93 |
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Z tablicy I-55 wyznaczam stopnie pokrycia kół: |
|
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|
|
eC= |
1,55 |
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eC= |
1,55 |
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eD= |
1,76 |
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eD= |
1,76 |
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|
Zatem ze wzoru I-55: |
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eC= |
1,55 |
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|
1,66 |
|
ea= |
1,66 |
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eD= |
1,76 |
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Siła obliczeniowa [IX-13]: |
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Pzast= |
5856,93 |
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ea= |
1,66 |
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|
3528,27 |
N |
Pobl= |
3528,27 |
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Sprawdzam naprężenia: |
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Pobl= |
3528,27 |
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l= |
0,387 |
|
|
72,94 |
<kgj[MPa]= |
310 |
sgzast[MPa]= |
72,94 |
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b[mm]= |
50 |
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m= |
2,5 |
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Na podstawie wzoru X-13 określam moc jaką może prze- |
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nieść przekładnia ze względu na warunek Hertza |
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dC= |
50 |
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dD= |
125 |
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kH[Mpa]= |
1322 |
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|
49,4 |
kW |
N= |
49,4 |
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b[mm]= |
50 |
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nII= |
1320 |
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|
Cm,a= |
478,2 |
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|
|
iv= |
|
Warunek Hertza jest spełniony. |
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III. Para kół EF- koła walcowe o zębach prostych. |
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materiał |
16HG |
Na materiał dobieram stal jak dla kół stożkowych |
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kgj [MPa]= |
310 |
kgj [MPa]= |
310 |
16HG |
w/g tabeli IX/17. Ochęd. |
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kgj [MPa]= |
310 |
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Przyjmuję szerokość wieńca y= |
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20 |
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y= |
20 |
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Dla znanej zastępczej liczby zębów koła małego dobieram |
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z tabeli X/1 |
w/g Czasownikowa współczynnik wytrzymałości |
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zęba u podstawy: |
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l= |
0,387 |
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l= |
0,387 |
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N[kW]= |
7 |
Obliczam minimalny moduł [X-4]: |
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y= |
20 |
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l= |
0,387 |
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kgj [MPa]= |
310 |
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1,74 |
[mm] |
mo= |
1,74 |
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nIII[1/min]= |
528 |
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ZE= |
20 |
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Dobieram moduł czołowy m= |
3 |
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m= |
3 |
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Średnice podziałowe kół : |
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ZE= |
20 |
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60 |
[mm] |
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dE= |
60 |
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ZF= |
48 |
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144 |
[mm] |
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dF= |
144 |
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m= |
3 |
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Średnice głów zębów: |
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dE= |
60 |
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66 |
[mm] |
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dF= |
144 |
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daE= |
66 |
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y= |
1 |
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150 |
[mm] |
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daF= |
150 |
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dE= |
60 |
Średnice stóp zębów: |
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dF= |
144 |
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52,8 |
[mm] |
dfE= |
52,8 |
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y= |
1 |
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c= |
0,2*m. |
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136,8 |
[mm] |
dfF= |
136,8 |
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m= |
3 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Szerokość wieńca: |
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y= |
20 |
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60 |
[mm] |
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b= |
60 |
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m= |
3 |
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Prędkość obwodowa dla ustalenia nadwyżki dynamicznej: |
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nIII[1/min]= |
528 |
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dE= |
60 |
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1,66 |
m/s |
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n= |
1,66 |
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Wartość współczynnika nadwyżek dynamicznych Cd |
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n= |
1,66 |
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1,64 |
IX/13-V |
Cd= |
1,64 |
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Z tablicy IX/11 odczytuję współczynnik przeciążenia Cp |
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Cp= |
1,5 |
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Cp= |
1,5 |
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Ze wzoru IX-9 wyznaczam siłę statyczną: |
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N= |
7 |
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n= |
1,66 |
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4216,87 |
[N] |
Pstat= |
4216,87 |
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Cp= |
1,5 |
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Cd= |
1,64 |
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10373,5 |
[N] |
Pzast= |
10373,5 |
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Pstat= |
4216,87 |
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Z tablicy I-55 wyznaczam stopnie pokrycia kół: |
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eE= |
1,55 |
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eE= |
1,55 |
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eF= |
1,75 |
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eF= |
1,75 |
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Zatem ze wzoru I-55: |
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eE= |
1,55 |
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eF= |
1,75 |
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1,65 |
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ea= |
1,65 |
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Siła obliczeniowa [IX-13]: |
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Pzast= |
10373,5 |
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ea= |
1,65 |
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6286,97 |
[N] |
Pobl= |
6286,97 |
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Sprawdzam naprężenia: |
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Pobl= |
6286,97 |
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l= |
0,387 |
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90,25 |
<kgj[MPa]= |
310 |
sgzast[MPa]= |
90,25 |
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b[mm]= |
60 |
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m= |
3 |
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Na podstawie wzoru X-13 określam moc jaką może prze- |
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dE= |
20 |
nieść przekładnia ze względu na warunek Hertza |
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dF= |
48 |
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kH[Mpa]= |
1322 |
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N= |
33,74 |
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b[mm]= |
60 |
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33,74 |
kW |
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nIII= |
528 |
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Cm,a= |
478,2 |
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iv= |
0,416666666666667 |
Warunek Hertza jest spełniony. |
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3. Obliczanie nacisków w kołach i wałków na zginanie. |
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I. Ustalam siły w kołach stożkowych. |
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Z rysunku XV-14. Dla zębów prostych znaduję siły: |
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Obwodową: |
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N[kW]= |
7 |
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wI[1/s]= |
345,58 |
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900 |
N |
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PAo= |
900 |
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deA= |
45 |
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Siłę poosiową koła napędzającego [XV-11]: |
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PAo= |
900 |
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dA= |
21,48 |
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122 |
N |
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PoA= |
122 |
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an[o]= |
20 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Koła napędzanego: |
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PAo= |
900 |
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an[o]= |
20 |
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304 |
[N] |
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PoB= |
304 |
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dB= |
68,12 |
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Siły są skierowane od wierzchołka do podstawy stożka. |
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Siły promieniowe: |
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Koła napędzającego: |
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PAo= |
900 |
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an[o]= |
20 |
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304 |
[N] |
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PrA= |
304 |
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dB= |
68,12 |
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Koła napędzanego: |
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PAo= |
900 |
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an[o]= |
20 |
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122 |
[N] |
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PrB= |
122 |
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dB= |
68,12 |
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Dla wału I obliczam reakcje w podporach w 2 płaszczyznach |
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z kołem osadzonym poza łożyskami [rys. XV-17] |
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Szerokość łożyska: |
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B1 [mm]= |
14 |
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B2 [mm]= |
14 |
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Odległość między łożyskami: |
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L1[mm]= |
25 |
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Odległość między łożyskiem 1, a kołem A: |
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L2[mm]= |
6 |
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Obliczeniowa szerokość koła A: |
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dA= |
21,48 |
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b= |
17 |
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e[mm]= |
16 |
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Zakładam rozstaw między łożyskami: |
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B1 [mm]= |
14 |
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L1[mm]= |
25 |
39 |
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b= |
39 |
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B2 [mm]= |
14 |
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Odległość między łożyskiem ł1, a osią koła: |
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B1 [mm]= |
14 |
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L2[mm]= |
6 |
21 |
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a= |
21 |
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e[mm]= |
16 |
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Reakcje w płaszczyźnie poziomej H: |
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Z równania momentów: |
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b= |
39 |
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|
-93 |
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R2H= |
-93 |
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a= |
21 |
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PrA= |
304 |
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PAo= |
900 |
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deA= |
45 |
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|
397 |
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R1H= |
397 |
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Momenty gnące w płaszczyźnie poziomej: |
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Dla koła A: |
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deA= |
45 |
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PoA= |
122 |
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|
2,745 |
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Mk= |
2,745 |
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Dla łożyska ł1: |
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b[mm]= |
39 |
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a[mm]= |
21 |
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-3,639 |
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Mł1H= |
-3,639 |
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Mk= |
2,745 |
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R1H= |
397 |
Dla łożyska ł2: |
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PrA= |
304 |
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Mł2= |
0 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Reakcje w płaszczyźnie pionowej V: |
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P= |
900 |
|
1384,61538461538 |
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a[mm]= |
21 |
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b[mm]= |
39 |
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R1V= |
1384,61538461538 |
|
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|
-484,615384615385 |
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R2V= |
-484,615384615385 |
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Momenty gnące w płaszczyźnie pionowej: |
|
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|
P= |
900 |
|
MgA= |
0 |
|
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MgA= |
0 |
|
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|
|
a[mm]= |
21 |
|
|
18,9 |
|
|
Mgł1= |
18,9 |
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Mgł2= |
0 |
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Mgł2= |
0 |
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Moment skręcający na wałku: |
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N[kW]= |
7 |
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wI[1/s]= |
345,58 |
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|
20 |
Nm |
|
Ms= |
20 |
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Wykresy momentów gnących i skręcających: |
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|
odl. Od koła |
MgH |
MgV |
MS |
MZ |
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|
0 |
2,745 |
0 |
2,745 |
20 |
17,5 |
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21 |
-3,639 |
18,9 |
19,2471379950371 |
20 |
25,9 |
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60 |
0 |
0 |
0 |
20 |
20 |
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Momenty zastępcze do obliczeń średnic wałków: |
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Mk= |
2,745 |
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Ms= |
20 |
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Nm |
MZk= |
17,5 |
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Mgł1V= |
18,9 |
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Mł1H= |
-3,639 |
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|
25,9 |
Nm |
MZł1= |
25,9 |
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MS= |
20 |
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Nm |
MZł2= |
20 |
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1 |
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2 |
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3 |
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materiał |
15 |
Minimalne średnice wałka dla obciążeń złożonych: |
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Na wałek dobieram stal do nawęglania: |
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15 |
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MZk= |
17,5 |
Pod koło zębate z warunku na skręcanie: |
|
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dla stali |
15 |
|
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Kt[MPa]= |
90 |
|
|
15,7 |
dobieram |
20 |
Dk[mm]= |
20 |
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kgj[MPa]= |
140 |
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Pod łozysko ł1 z warunku na zginanie: |
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MZł1= |
25,9 |
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|
12,3 |
dobieram |
20 |
Dł1= |
20 |
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Pod łozysko ł2 z warunku na skręcanie: |
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16,4 |
dobieram |
20 |
Dł2= |
20 |
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1. Obliczenie wałka II |
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Siły pochodzące od koła B: |
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POB= |
304 |
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PrB= |
122 |
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PBo= |
900 |
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Siła obwodowa koła C: |
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N[kW]= |
7 |
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wII[1/s]= |
138,23 |
2026 |
|
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PCo= |
2026 |
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dpC= |
50 |
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an[o]= |
20 |
Siła promieniowa: |
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PCo= |
|
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PCo= |
2026 |
|
|
737 |
|
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PrC= |
737 |
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DANE |
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|
OBLICZENIA |
|
|
WYNIKI |
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Dla wału II obliczam reakcje w podporach w 2 płaszczyznach |
|
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z kołem stożkowym osadzonym między łożyskami wraz |
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z kołem walcowym |
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Dla potrzeb obliczeń zakładam: |
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Szerokość łożyska: |
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B1 [mm]= |
15 |
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B2 [mm]= |
15 |
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L1[mm]= |
10 |
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Odległość między kołami: |
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L2[mm]= |
10 |
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Odległość między łożyskiemB2, a kołem C: |
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L3[mm]= |
80 |
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Obliczeniowa szerokość koła B e: |
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b[mm]= |
17 |
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e[mm]= |
6 |
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Zakładam rozstaw między łożyskiem B1 a kołem B: |
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|
L1[mm]= |
10 |
|
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|
20,5 |
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|
Zakładam rozstaw między kołami B i C: |
|
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|
|
a[mm]= |
20,5 |
|
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|
L2[mm]= |
10 |
|
|
38 |
|
|
b[mm]= |
38 |
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|
Odległość między łożyskiem B2, a osią koła C: |
|
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|
|
c[mm]= |
112,5 |
|
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|
|
L3[mm]= |
80 |
|
|
|
112,5 |
|
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b[mm]= |
38 |
Reakcje w płaszczyźnie poziomej H: |
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|
c[mm]= |
112,5 |
Z równania momentów: |
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PrC= |
737 |
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PrB= |
122 |
|
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|
338 |
N |
R2H= |
338 |
|
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deB= |
112,5 |
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Lc[mm]= |
171 |
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POB= |
304 |
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|
277 |
N |
R1H= |
277 |
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Momenty gnące w płaszczyźnie poziomej: |
|
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Dla koła A: |
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Dla łożyska ł1: |
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|
0 |
|
|
Mł1= |
0 |
|
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|
|
Dla koła B: |
|
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|
|
R2H= |
338 |
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R1H= |
277 |
|
|
|
-23 |
|
MKB= |
-23 |
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Dla koła C: |
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|
-38 |
MKC= |
-38 |
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|
Dla łożyska ł2: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
|
|
Mł2= |
0 |
|
|
|
|
|
|
|
|
|
|
801 |
|
R2V= |
801 |
|
|
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|
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|
DANE |
|
|
|
OBLICZENIA |
|
|
WYNIKI |
|
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|
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|
|
|
Momenty gnące w płaszczyźnie pionowej: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla łożyska ł1: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
|
|
Mł1= |
0 |
|
|
|
|
|
|
|
Dla koła B:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
43,5625 |
|
|
MKB= |
43,5625 |
|
|
|
|
|
|
|
Dla koła C: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
90,1125 |
|
MKC= |
90,1125 |
|
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|
50,6 |
Nm |
|
MsII= |
50,6 |
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|
|
Wykresy momentów gnących i skręcających: |
|
|
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|
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|
|
|
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|
|
|
odl. Od ł1 |
MgH |
MgV |
Ms |
MZ |
|
|
|
|
|
|
|
|
0 |
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
20,5 |
-23 |
43,5625 |
49,2614596439245 |
50,6 |
65,9 |
|
|
|
|
|
|
|
|
58,5 |
-38 |
90,1125 |
97,7970483002938 |
50,6 |
107,2 |
|
|
|
|
|
|
|
|
171 |
0 |
0 |
0 |
0 |
0 |
|
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|
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|
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|
|
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|
|
Momenty zastępcze do obliczeń średnic wałków: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla łożyska ł1: |
|
|
|
|
|
|
|
|
|
|
|
MKBV= |
43,5625 |
Mzł1= |
0 |
|
|
|
Mzł1= |
0 |
|
|
|
|
|
MKBH= |
-23 |
Dla koła B: |
|
|
|
|
|
|
|
|
|
|
|
MsII= |
50,6 |
|
|
|
|
65,9 |
MzB= |
65,9 |
|
|
|
|
|
|
|
Dla koła C: |
|
|
|
|
|
|
|
|
|
|
|
MKCH= |
-38 |
|
|
|
|
107,2 |
MzC= |
107,2 |
|
|
|
|
|
MKCV= |
90,1125 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla łożyska ł2: |
|
|
|
|
|
|
|
|
|
|
|
|
|
MZł2= |
0 |
|
|
|
|
|
|
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Minimalne średnice wałka dla obciążeń złożonych: |
|
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|
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|
|
|
MzB= |
65,9 |
Pod koło zębate B: |
|
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|
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|
|
0 |
Na wałek dobieram stal do nawęglania: |
|
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|
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|
|
|
|
|
|
|
107,2 |
15 |
|
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MzC= |
107,2 |
16,8 |
dobieram |
28 |
DB[mm]= |
28 |
|
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|
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dla stali |
15 |
|
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|
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|
|
Kt[MPa]= |
90 |
Pod koło C: |
|
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|
|
kgj[MPa]= |
140 |
|
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|
19,7 |
dobieram |
34 |
Dc[mm]= |
34 |
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WAŁEK -III- |
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Obliczam siły działające na koło D |
|
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N[kW]= |
7 |
-obwodową |
|
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|
wIII[1/s]= |
55,29 |
|
2025,68276361006 |
[Nm] |
PDo[Nm]= |
2025,68276361006 |
|
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|
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dpD[mm]= |
125 |
|
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PDo[Nm]= |
2025,68276361006 |
|
|
[Nm] |
PDr[Nm]= |
737 |
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an[o]= |
20 |
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Obliczam siły działające na koło E |
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N[kW]= |
7 |
-obwodową |
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dpE[mm]= |
60 |
|
[Nm] |
PEo[Nm]= |
4220 |
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wIV[1/s]= |
23,04 |
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-promieniową |
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|
PEo[Nm]= |
4220 |
|
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|
1536 |
[Nm] |
PEr[Nm]= |
1536 |
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an[o]= |
20 |
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Obliczam długość wałka |
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58,5 |
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|
-szerokość łożyska A |
|
|
|
65 |
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BA= |
15 |
[mm] |
47,5 |
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|
-odstęp pomiędzy łożyskiem A a kołem zębatym D |
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L1= |
26 |
[mm] |
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|
-szerokość wieńca zębatego koła D |
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|
bD= |
50 |
[mm] |
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|
-odstęp pomiędzy kołem zębatym D a kołem zębatym E |
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|
-szerokość wieńca zębatego koła E |
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|
bE= |
60 |
[mm] |
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|
-odstęp pomiędzy łożyskiem B a kołem zębatym E |
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|
L3= |
10 |
[mm] |
0 |
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|
|
-szerokość łożyska B |
|
|
|
58,5 |
|
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|
BB= |
15 |
[mm] |
123,5 |
|
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|
171 |
|
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|
Zakładam rozstaw między łożyskiem A a kołem D: |
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|
58,5 |
|
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|
|
Zakładam rozstaw między kołami D i E: |
|
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|
|
a[mm]= |
58,5 |
|
|
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|
|
L1= |
26 |
|
|
65 |
|
|
b[mm]= |
65 |
|
|
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|
|
L2= |
10 |
Odległość między łożyskiem B2, a osią koła C: |
|
|
|
c[mm]= |
47,5 |
|
|
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|
|
L3= |
10 |
|
47,5 |
|
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|
|
a[mm]= |
58,5 |
Długość wałka między osiami łożysk: |
|
|
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|
|
b[mm]= |
65 |
|
|
171 |
|
|
Lc= |
171 |
|
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|
|
c[mm]= |
47,5 |
|
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|
bD= |
50 |
Obliczam reakcję łożysk w płaszczyźnie |
|
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|
|
bE= |
60 |
-pionowej |
|
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|
|
PDo= |
2025,68276361006 |
3741 |
R2V= |
3741 |
|
|
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|
|
PEo= |
4220 |
|
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|
|
R2V= |
3741 |
2505 |
R1V= |
2505 |
|
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|
|
-poziomej |
|
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|
|
PDr= |
737 |
|
857 |
R2H= |
857 |
|
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|
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PEr= |
1536 |
|
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|
|
R2H= |
857 |
|
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|
58 |
R1H= |
58 |
|
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|
|
Obliczam momenty gnące działającena wałek: |
|
|
|
|
Mł1= |
0 |
|
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|
|
- w płaszczyźnie pionowej |
|
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|
|
Mg1H= |
0 |
|
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|
|
R1V= |
2505 |
|
|
146,5 |
MgDV= |
146,5 |
|
|
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|
|
|
|
|
441 |
MgEV= |
441 |
|
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|
0 |
|
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|
|
- w płaszczyźnie poziomej |
|
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|
|
Mg1H= |
0 |
|
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|
|
3,393 |
|
MgDH= |
3,393 |
|
|
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|
|
R1H= |
58 |
55,07 |
|
MgEH= |
55,07 |
|
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|
0 |
|
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|
|
Obliczam moment skręcający na wałku |
|
|
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|
|
|
N[kW]= |
7 |
Ms1= |
0 |
Ms2= |
0 |
|
|
|
|
|
|
|
|
wIII[1/s]= |
55,29 |
|
|
|
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|
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|
|
|
MsE=MsD= |
|
126,6 |
|
Ms= |
126,6 |
|
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|
126,6 |
|
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|
|
DANE |
|
|
|
OBLICZENIA |
|
|
WYNIKI |
|
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|
|
MgDV= |
146,5 |
|
|
|
|
|
|
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|
|
|
|
|
MgEV= |
441 |
Obliczam rzeczywisty moment zginający wałki |
|
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|
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|
|
146,5 |
|
|
|
|
|
|
|
|
|
|
MgD= |
146,5 |
|
|
|
|
|
MgDH= |
3,393 |
444,4 |
MgE= |
444,4 |
|
|
|
|
|
MgEH= |
55,07 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla łożysk moment gnący nie występuje Mg= |
|
|
|
0 |
|
|
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|
0 |
|
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|
|
Korzystając z teorii Hubera wytrzymałości materiałów |
|
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|
|
obliczam naprężenia zastępcze |
|
|
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|
|
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|
|
MgD= |
146,5 |
|
|
|
|
|
|
|
|
|
|
MgE= |
444,4 |
|
183 |
MZD= |
183 |
|
|
|
|
|
Ms= |
126,6 |
|
|
MZE= |
457,7 |
|
|
|
|
|
|
|
|
457,7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla łożysk moment gnący nie występuje Mg= |
|
|
|
0 |
|
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|
|
odl. Od ł1 |
MgH |
MgV |
Ms |
MZ |
|
|
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|
|
|
|
|
0 |
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
58,5 |
3,393 |
146,5 |
146,539286367172 |
126,6 |
183 |
|
|
|
|
|
|
|
|
123,5 |
55,07 |
441 |
444,42513981547 |
126,6 |
457,7 |
|
|
|
|
|
|
|
|
171 |
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
Minimalne średnice wałka dla obciążeń złożonych: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Pod koło zębate B: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Na wałek dobieram stal do nawęglania: |
|
|
|
|
|
|
|
|
|
|
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|
|
15 |
|
|
|
|
stal |
15 |
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|
|
|
|
|
|
MZD= |
183 |
|
|
|
|
|
|
|
|
|
|
|
MZE= |
457,7 |
23,6 |
dobieram |
30 |
DD= |
30 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
kgj[MPa]= |
140 |
Pod koło C: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
32 |
dobieram |
36 |
DE= |
36 |
|
|
|
|
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WAŁEK -IV- |
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Obliczam siły działające na koło F |
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-obwodową |
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PFo= |
4219,7 |
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N[kW]= |
7 |
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4219,7 |
[N] |
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wIV[1/s]= |
23,04 |
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dpF= |
144 |
-promieniową |
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1535,84519753309 |
[N] |
PFr= |
1535,84519753309 |
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PFo= |
4219,7 |
Obliczam długość wałka |
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an[o]= |
20 |
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-szerokość łożyska 1 |
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B1= |
15 |
[mm] |
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-odstęp pomiędzy łożyskiem 1 a kołem zębatym F |
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L1= |
86 |
[mm] |
123,5 |
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-szerokość wieńca zębatego koła F |
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47,5 |
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bF= |
60 |
[mm] |
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-odstęp pomiędzy łożyskiem 2 a kołem zębatym F |
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L2= |
10 |
[mm] |
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-szerokość łożyska 2 |
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B2= |
15 |
[mm] |
0 |
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-długość wałka pod sprzęgło |
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123,5 |
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L3= |
50 |
[mm] |
171 |
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DANE |
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OBLICZENIA |
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WYNIKI |
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L1= |
86 |
Zakładam rozstaw między łożyskiem 1 a kołem F: |
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L2= |
10 |
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123,5 |
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a[mm]= |
123,5 |
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L3= |
50 |
Odległość między łożyskiem 2, a osią koła F: |
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b[mm]= |
47,5 |
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47,5 |
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Długość wałka między osiami łożysk: |
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171 |
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Lc= |
171 |
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Obliczam reakcję łożysk w płaszczyźnie |
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a[mm]= |
123,5 |
-pionowej |
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b[mm]= |
47,5 |
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3047,6 |
[N] |
R2V= |
3047,6 |
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R2V= |
3047,6 |
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R1V= |
1172,1 |
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R1V= |
1172,1 |
1172,1 |
[N] |
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PFo= |
4219,7 |
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-poziomej |
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1109,2 |
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R2H= |
1109,2 |
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R1H= |
426,645197533094 |
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Obliczam momenty gnące działające na wałek: |
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- w płaszczyźnie pionowej |
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Mg1H= |
0 |
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R1V= |
1172,1 |
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137 |
MgFV= |
137 |
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a[mm]= |
123,5 |
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Mg2H= |
0 |
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PEo= |
0 |
- w płaszczyźnie poziomej |
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R1H= |
426,645197533094 |
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52,7 |
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MgFH= |
52,7 |
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Mg2H= |
0 |
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Obliczam moment skręcający na wałku |
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Dla łożyska 1: |
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Ms1= |
0 |
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N[kW]= |
7 |
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wIV[1/s]= |
23,04 |
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MsF= |
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303,8 |
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Ms= |
303,8 |
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303,8 |
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Ms2= |
303,8 |
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Obliczam rzeczywisty moment zginający wałki |
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MgFV= |
137 |
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MgFH= |
52,7 |
146,8 |
MgF= |
146,8 |
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Dla łożysk moment gnący nie występuje Mg= |
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0 |
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0 |
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Korzystając z teorii Hubera wytrzymałości materiałów |
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obliczam naprężenia zastępcze |
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MgF= |
146,8 |
|
301,3 |
MZF= |
301,3 |
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Ms= |
303,8 |
Dla łożysk moment gnący nie występuje Mg= |
0 |
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Dla łożyska ł2 moment zastępczy jest równy momentowi |
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skręcającemu: |
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303,8 |
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Ms= |
303,8 |
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15 |
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odl. Od ł1 |
MgH |
MgV |
Ms |
MZ |
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0 |
0 |
0 |
0 |
0 |
0 |
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123,5 |
52,7 |
137 |
146,786545704979 |
303,8 |
301,3 |
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171 |
0 |
0 |
0 |
303,8 |
263,098517669712 |
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Minimalne średnice wałka dla obciążeń złożonych: |
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Na wałek dobieram stal do nawęglania: |
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Pod koło zębate z warunku na zginanie: |
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MZF= |
301,3 |
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Ms= |
303,8 |
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27,8 |
dobieram |
32 |
Df= |
32 |
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dla stali |
15 |
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Kt[MPa]= |
90 |
Pod łożysko ł2 z warunku na skręcanie: |
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kgj[MPa]= |
140 |
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40,7 |
dobieram |
45 |
Dł2= |
45 |
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trwałość |
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V. Obliczam łożyska. |
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LH= |
10000 |
Korzystam ze wzoru z katalogu łożysk tocznych rolkowych: |
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RI1= |
1440,40576342696 |
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RI2= |
493,458276864333 |
14043,7926117235 |
N |
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RII1= |
2142,97783469638 |
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RII2= |
869,393466734136 |
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CI2= |
4811,16215914986 |
N |
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RIII1= |
2505,671367119 |
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CII1= |
15872,130790913 |
N |
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RIII2= |
3837,90698167634 |
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CII2= |
6439,229836796 |
N |
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RIV1= |
1247,33497288341 |
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CIII1= |
14098,0699838396 |
N |
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RIV2= |
3243,17597425733 |
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CIII2= |
21593,8458367554 |
N |
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nI[1/min]= |
3300 |
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CIV1= |
5397,03554889608 |
N |
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3300 |
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CIV2= |
14032,7469404072 |
N |
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nII[1/min]= |
1320 |
Z katalogu łożysk na podstawie dopuszczalnych obciążeń |
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|
1320 |
dynamicznych dobieram łożyska: |
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nIII[1/min]= |
528 |
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wymiary: |
d[mm] |
D[mm] |
B[mm] |
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528 |
łI1= |
30204A |
20 |
47 |
14 |
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nIV[1/min]= |
220 |
łI2= |
30204A |
20 |
47 |
14 |
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220 |
łII1= |
N304 |
20 |
52 |
15 |
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łII2= |
NJ304 |
20 |
52 |
15 |
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łIII1= |
N304 |
20 |
52 |
15 |
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łIII2= |
NJ304 |
20 |
52 |
15 |
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łIV1= |
N304 |
20 |
52 |
15 |
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łIV2= |
NJ209 |
45 |
85 |
19 |
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Odległości między osiami kół: |
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łożysk 1 |
łożysk 2 |
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II-III= |
87,5 |
52 |
52 |
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III-IV= |
102 |
52 |
68,5 |
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MI[Nm]= |
20,26 |
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MII[Nm]= |
50,64 |
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50,64 |
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MIII[Nm]= |
126,61 |
Pod koła i sprzęgła dobieram następujące średnice: |
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126,61 |
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wymiary: |
t1 |
b |
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MIV[Nm]= |
303,82 |
sprzęgło wejściowe= |
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20 |
3,5 |
6 |
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303,82 |
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koło B= |
28 |
4 |
8 |
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koło C= |
34 |
5 |
10 |
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koło D= |
30 |
4 |
8 |
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koło E= |
36 |
5 |
10 |
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koło F= |
32 |
5 |
10 |
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sprzęgło wyjściowe= |
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45 |
5,5 |
14 |
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~koło A - wykonane razem z wałkiem. |
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DANE |
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OBLICZENIA |
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WYNIKI |
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Obliczam siły ścinające wpusty: |
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Dla stali st7 |
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2026 |
N |
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Pdop[MPa]= |
140 |
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FB= |
3617,14285714286 |
N |
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FC= |
2978,82352941176 |
N |
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FD= |
8440,66666666667 |
N |
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FE= |
7033,88888888889 |
N |
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FF= |
18988,75 |
N |
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Fwy= |
13503,1111111111 |
N |
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Obliczam długości wpustów z nacisków powierzchniowych |
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10 |
dobieram |
25 |
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lB= |
14 |
dobieram |
30 |
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lC= |
14 |
dobieram |
40 |
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N[kW]= |
7 |
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lD= |
23 |
dobieram |
40 |
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ir2= |
0,4 |
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lE= |
20 |
dobieram |
40 |
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ir3= |
0,416666666666667 |
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lF= |
37 |
dobieram |
44 |
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lwy= |
32 |
dobieram |
44 |
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zC= |
20 |
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zE= |
20 |
V. Obliczam przekładnię na zagrzanie |
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Wyznaczam moc tarcia dla kół stożkowych wg [XI-17] |
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0,0598 |
[kW] |
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0,07 |
[kW] |
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0,0708 |
[kW] |
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0,2006 |
[kW] |
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Zatem współczynnik pewności na zagrzanie: |
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1,923 |
>1 |
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