WX0082万向节十字轴总成失效分析和设计改进

通过对重型卡车用WX0082万向节十字轴总成寿命不足失效件的失效形式、失效原因、结构参数、材料等进行全面分析,有针对性地对产品进行了设计改进.主要设计改进要点为:改进十字轴轴径尺寸和过渡圆弧,通过有限元分析使其应力均匀分布;选择柔性密封的油封唇口,提高油封的抗磨性能;设计自锁式防尘罩,具有良好的耐低温性能;改进滚针设计,采用全凸素线型滚针,防止在轴承运动过程中断裂;对润滑脂改进采用复合尿基脂,具有很好的极压性能和耐高温性能.通过改进,使万向节静扭强度提高了25%以上,并大幅度提高了万向节的磨损寿命,使万向节的使用寿命从一年两万公里提高到两年五万公里.

Failure Analysis and Design Improvement for WX0082 U-joint Cross Assembly

After analysis on the short life failure part of WX0082 u-joint cross assembly used on heavy truck by its failure mode, failure causes, structural parameter and material. The main improving points have been done to the product, such as improving the cross'trunnion dimension and transitional round arc R; making its stress distribute uniformly through software ANSYS; selecting soft seal lip to improve the seal's abrasion resistance; designing self locked dust cap which has well low temperature resistance; imp...