重型汽车驱动桥轮毂轴承配合失效分析

Failing Cooperation Analysis on Hub Bearing of Heavy Vehicle Real-wheel Drive

采用有限元分析方法,分析了大径向载荷作用下某重型汽车驱动桥轮毂轴承过盈配合处的接触应力分布。结果表明:最大应力容易出现在内侧轮毂小轴承的下侧,且在最大载荷工况下,最大应力超过了轮毂支承材料的屈服极限,内侧轮毂小轴承与轮毂支承间易于发生打滑现象,从而造成轮毂轴承配合失效。为解决重型汽车轮毂轴承配合失效问题,轮毂支承需要采用屈服极限较高的材料。

Based on the finite element analysis method, the contact stress distribution at the hub bearing sur- plus coupling place was analyzed, under the big radial direction load, of some heavy vehicle real-wheel drive. The results show that： the greatest stress easily appears at the bottom side of the small hub bearing. In the maximum load conditions, the greatest stress is more than materials yield limit of the wheel hub, a skid phenomenon hap- peued between the small hub bearing and the wheel hub, and failing cooperation caused. To solve the development of failing cooperation between hub bearing outer ring and the wheel hub in heavy vehicle, the high yield limit mate- rial is needed to adopt.