球轴承弹流润滑模拟系统

A Simulation System for the EHL Oil Film in a Ball Bearings

以推力球轴承钢球组取代传统弹流油膜测量系统中的单个钢球,设计制造球轴承弹流润滑模拟测量系统。该系统可实现钢球转动速度和油膜厚度的同时测量,通过钢球组方位角的调节模拟运动钢球不同的承载状态。在偏载条件下,对运动钢球的润滑膜厚度和转速进行初步测量。结果表明:当钢球由低载区进入高载区,接触区增加,膜厚降低,润滑状态由流体动压润滑变为弹性流体动压润滑;在高承载区,油膜厚度不受载荷的影响;在某一固定位置随着转速的增大,油膜厚度增大。

A simulating system of ball bearing lubrication was developed, in which the a group of balls were used instead of the single ball in an traditional optical elastic hydrodynamic lubrication（EHL） test apparatus： The present system is ca pable of simultaneous measurement of the ball movement speed and the film thickness, and the loading status can be pro duced by adjustment of the tilt angle of the ball group. Under a unbalanced load, some preliminary measurements were car ried out for the lubrication film thickness and ball movement speed. The results show that when the ball runs from the low loading zone into heavy loading zone, the contact area is increased and the film thickness is decreased, and the lubrication state is changed from the hydrodynamic lubrication into EHL. In the heavy loading zone, the film thickness is not obviously influenced by the load. At a fixed position,the film thickness is increased with the speed.