高速滚子轴承运动特性的动态模拟

DYNAMIC SIMULATION OF HIGH-SPEED ROLLER BEARINGS

在高速轻载的工况下 ,滚子轴承的打滑蹭伤及由于滚子歪斜引起的滚子端面磨损已成为滚子轴承的主要失效原因。本文根据牛顿运动定律 ,建立了滚子的动力学模型 ,并对滚子轴承径向载荷分布和油膜拖动力的计算进行了详细讨论。利用本文所编制的软件 ,对滚子和保持架的打滑以及滚子的歪斜运动进行了动态模拟 ,得到与实际相符的结果 ,可用为实际轴承设计。

The ge neral fatigue theory of rolling bearings is unable to predict the failure du e to skidding and skewing of rolling ele ments,which often occur in high speed roller bearings.Accordin g to the hydrodynamic lubrication and EH L theory,a model of interaction among rolling elements is est ablished.The dynamic model of roller bearings is also established according to the second Newton law.B y means of the program provided in the papar,it is possible to calculate the load distribution,oilfilm thickness and fatigue life of roller bearings,and to simulate dynamically the skidding of rollers and cage,the skewing and axial motion of rollers.Hence,a new effective tool of design and failure analysis is provided for high speed roller bearings.