固液润湿性对流体动压润滑薄膜的影响  

Influences of the Liquid/solid Wettability on Thin Hydrodynamic Lubrication Films

作　　者：杨淑燕[1] 郭峰[1] 马冲[1] 王海峰[2] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033 [2]青岛大学机电工程学院,山东青岛266071

出　　处：《摩擦学学报》2010年第2期203-208,共6页Tribology

基　　金：教育部新世纪优秀人才支持计划项目(NCET-07-0474);青岛市科技发展基金项目(06-2-2-14-jch)资助

摘　　要：利用自行开发的微型面接触润滑油膜测量系统,研究了固液润湿性对流体动压润滑油膜厚度的影响.试验中以静止的微型滑块平面和旋转的光学透明圆盘平面形成润滑副.固液的润湿性通过接触角判定,不同材料的微滑块平面和润滑液体形成不同的界面.在保持载荷和面接触楔形角不变的条件下对油膜厚度-速度关系进行了测量.结果表明:对于固液润湿性强的界面,形成的油膜厚度与经典润滑理论有较好的一致性;当固液润湿性明显降低时,测量得到的油膜厚度减小.对于试验中观察到的界面效应,应用界面滑移理论进行了初步分析.This paper describes some experimental studies about the influences of liquid/solid wettability on thin hydrodynamic lubrication film thickness by a custom-made test apparatus.In the experiments,the lubricated contact consisted of a micro-slider plane and a transparent glass disc.The liquid/solid wettability can be differentiated by the contact angle of the lubricant to the lubricated surfaces,and different slider materials and lubricants can generate interfaces of different wettability.Under a fixed load and a constant slider inclination angle,the film thickness at different entrainment speeds was measured.The results showed that for strong liquid-solid wettability the measured film thickness versus speeds was well correlated to the classical lubrication theory.And when the interface of weak wettability is used,significant film thickness variation can be found.By wall-slippage,the experimental finds were tentatively explained.

关 键 词：面接触 油膜厚度 光干涉 表面滑移 润湿性 

分 类 号：TH117.2[机械工程—机械设计及理论]