重载万向联轴器十字轴强度分析及结构优化

Strength Analysis and Structure Optimization of Heavy-Duty Universal Couplling's Cross Shaft

运用CATIA对重载十字轴式万向联轴器进行几何建模,利用ANSYS Workbench对十字轴进行了应力分析、变形分析,并对十字轴进行结构强度计算,分析得到危险截面的Equivalent Von-Mises Stress与理论计算值基本相符。应力分析得到十字轴应力集中出现在两个相邻轴颈间的过渡圆角处,与十字轴实际应用时发生断裂的部位一致。对轴根过渡曲线进行结构设计,优化后结果表明十字轴轴根采用双曲率型线过渡曲线结构比采用单曲率大圆弧过渡曲线时,十字轴最大等效应力和总变形量都有所降低。

The geometry modelof cross shaft heavy-duty universal coupling has been built based on CATIA. ANSYS Workbench is appliedtoperformstress analysis and deformation analysis. Structure strength of cross shaft has been calculated. Equivalent Von-Misesstress of the dangeroussection is basicallycoincident withtheoreticalcalculated values.It is obtained from stress analysis that the stress concentration of cross shaftoccurs in transition fillet between two adjacent shafts.It is consistent with the fracture position of cross shaft when practicallyapplied. Structure optimization design results of double-curvature arc transition curve used for cross shaft root show thatthe maximum equivalent stress and total deformation of cross shaft both reducemare than that of cross shaft root with single large arc transition curve.