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Reasonable choice of the modulus and the gear teeth

Check Calculation of degree of contact strength 2.2.1 Check Calculation of the gear shaft gear shaft 2.2.1.1 Calculation of contact stress O \KI-ta * K №) ZH * ZE ** ZB where: F - the name of the tangential force, F: 2000/d1 * 9549 * P / 1, calculated at 932024.5Ndl,[link widoczny dla zalogowanych], r /. 1 - were indexing gear shaft diameter and speed, respectively, by the calculation of 376.22mm and 21.786r/rainKA, K № - use the load factor and distribution coefficient between teeth, the look-up table the values of 1. 1Kv, KlI plant dynamic load factor and tooth load distribution coefficient, the calculated values were 1.0425 and 1.71zH, ZE - node area coefficient and elastic coefficient, the look-up table the values were 2.26 and 189 .8 (N) / 2, a coefficient, and helix angle coincidence coefficient, the calculated values were 0.847 and 0.989. The calculation can be: stare at H = 1473.54N/ram22.2.1.2 According to the test gear shaft gear contact fatigue limit calculated contact stress O'HG: arn '~ Zr, rr * ZL * Zv * ZR * Zw * Zx where: stare} n extensive test gear contact fatigue limit, according to the gear shaft 2OCrNi2M0 and carburized material hardness 58 ~ 62HRC, look-up table is preferable to a life of 1500Nz coefficient, calculated look-up table values for the 1.16ZL, Zv,[link widoczny dla zalogowanych], ZR, Zw, Zx - followed by lubricants factor, speed factor, roughness coefficient, tooth surface work hardening coefficient and size of coefficient, look-up table and its value by taking 1.055,0.95,1.01, 1.0 and 0.9. The calculation yields: O'HG = 1585.22N/mm2. 2.2.1.3 Calculation of the gear shaft contact strength safety factor SH = am / aH = 1.0762.2.2 gear tooth root bending strength check of shafts 2.2.2.1 Calculation of tooth root stress calculation of the gear shaft O \form factor and stress correction factor, the look-up table whose values were 2.17 and 1.8lY, Y 『__ overlap coefficient and coefficient of helix angle, the calculated values were 0.767 and 0.805KF8-- Tooth load distribution coefficient, by calculating the value of 1.64KFa-- load distribution coefficient between teeth, the look-up table a value of 1.1. The calculation can be: stare F = 623.78N. 2.2.2.2 Based on the test gear tooth root bending fatigue limit of the tooth root stress calculation of the gear shaft O'FGa ~ imYs'r * Yr, rr * Y ~ rdT * YRreIT * Yx where: stare F1i - Test Gear the tooth root bending fatigue limit, according to the gear shaft hardness of materials 20CrNi2Mo and carburized 58 ~ 62HRC,[link widoczny dla zalogowanych], look-up table is desirable 430N/mm2Ys' r, Yr, rr, Y8T, YlT, Yx - followed by the stress test gear correction coefficient, the life factor, the relative sensitivity coefficient tooth fillet, and the relative coefficient of tooth surface conditions and size of coefficient, look-up table and its value by taking 2.0,0.94,1.0,1.0 and 0.925. The calculation can be obtained: O'FG: 747.77N. 2.2.2.3 gear shaft tooth root strength safety factor SF = arc, ~ aF = 1.1993 Analysis of the results from the gear shaft of the tooth surface contact strength and root bending strength check calculation shows that: the gear shaft modulus of teeth into 16,23 respectively 20,19, the gear tooth contact strength calculation axis safety factor rose to 1.076 from the 1.053, while the gear shaft tooth root strength by the 1.39 factor of safety dropped to 1.199. According to the design of the gear tooth contact strength of tooth root strength and safety factors are similar, and the tooth root strength safety factor slightly higher than the intensity of tooth contact the principle of calculating the safety factor J, the gear shaft through the module, a reasonable number of teeth to improve After the design to ensure that the tooth root bending in the premise, tooth surface contact fatigue resistance has been strengthened, so that the gear shaft of the tooth surface less prone to pitting. References [1] Xu Hongji,[link widoczny dla zalogowanych], Tao Yanguang, Leiguang editor. Gear manual. Beijing: China Machine-r ~ l, Press, 2000.2,96,[link widoczny dla zalogowanych],157 [2] Xu Hongji, Tao Yanguang, Leiguang editor. Gear manual. Beijing: China Machine Press. 2000.95 Received El :2003-03-18 of Reviewers: Li Xing Yuan Editor: Wei Haiqing
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