渐开线斜齿轮单齿弯曲疲劳加载试验方法研究

针对渐开线斜齿轮的弯曲疲劳强度试验测试问题,利用RomaxDesigner仿真软件研究了不同齿宽和螺旋角的齿根弯曲应力变化规律和载荷分配关系,得到了最大应力及相应的接触线位置及其载荷,可用于斜齿轮单齿弯曲疲劳试验的加载位置和加载载荷的确定。对比分析了不同螺旋角齿轮弯曲应力仿真值与GB/T3480-1997中通过一系列修正系数得到的计算值,发现二者存在较大区别,证明了对斜齿轮进行弯曲疲劳试验的必要性;同时提出了斜齿轮弯曲疲劳强度试验方案。斜齿轮弯曲疲劳试验的结果可以转换到国家标准中,以提高斜齿轮弯曲强度评估的准确性。

Research of Test Method of Single Tooth Bending Fatigue Loading of Involute Helical Gear

For the problem of bending fatigue strength test of involute helical gear,the change regulations of bending stress and load distribution relation of helical gears with different tooth width and helical angle are re searched by using RomaxDesigner.The contact line positions and the maximum stress are got,and it can be used to determine the loading position and load of helical gear in single tooth bending fatigue test.The simula tion values of bending stress of different helical angle gears and the calculated values obtained by a series of cor rection coefficients in GB/T 3480 1997 are compared and analyzed.It is found that there is a big difference be tween them,which proves the necessity of bending fatigue test of helical gear.The test scheme of helical gear bending fatigue strength is raised.The results of helical gear bending fatigue test according to the method can be transformed into the national standard,which can be used in future to improve the accuracy of evaluating helical gear bending strength.