高速圆柱滚子轴承保持器动力分析

A Dynamic Analysis on the Retainer of High-Speed Roller Bearings

本文将高速圆柱滚子轴承及座圈简化为平面机械系统,利用拟动力学方法计算轴承内部的负荷分布,把滚子与保持器的接触归结为流体动力润滑、刚性接触和自由状态,在此基础上,建立了保持器与滚子组件的动力学方程。通过数值求解,揭示了滚子与保持器之间存在刚性冲击,冲击频率和冲击力幅值与保持器窗孔间隙及润滑油性质的关系。

The bearing and its house are reduced to a two-dimensional mechanical system and the dynamic equations of motion for roller and retainer are derived. The roller/ retainer interactions are modelled as in hydrodynamic lubrication, rigid contact and free state. The influences of the race elasticity and the roller centrifugal force on bearing performance are considered independently in the model with the quasi-static method. The results of calculation with an example show that there exists rigid collision between roller and retainer and the frequency of collision and the magnitude of collision force are dependent on the roller/retainer pocket clearance and the viscosity of the lubricant.