表面凹槽对流体动压润滑油膜厚度的影响

利用自行研发的面接触光干涉油膜厚度测量系统，对表面凹槽滑块的流体动压润滑油膜厚度进行了试验测量，试验中以静止的微型凹槽滑块平面和旋转的光学透明圆盘平面构成润滑副，且两润滑平面始终保持平行；在固定的载荷(速度)条件下，对油膜厚度-速度(载荷)曲线进行测量.结果表明：凹槽的宽度，深度，方向和位置等因素对油膜厚度有着重要影响.同时采用经典Reynolds方程对油膜厚度进行了理论计算，结果表明理论值在某些条件下并不能解释试验结果.

Influence of Grooved Surface on the Film Thickness of Hydrodynamic lubrication

This paper describes some experimental studies about the influences of grooved surface on the film thickness of hydrodynamic lubrication by a custom-made test apparatus. In the experiments, the lubricated parallel contact consisted of a micro-slider plane and a transparent glass disc. Under a fixed load (speed), the film thickness at different entrainment speeds (load) was measured. The results show that the width, depth, orientation and position of the groove were the key factors to affect the film thickness. Furthermore, the classical Reynolds equation was used to calculate the film thickness. Comparisons between theoretical analysis and experiments show that the classic Reynolds equation cannot always be used to predict the surface texture effect. Keywords: conformal contacts, grooved surface, hydrodynamic lubrication, film thickness