纯滑动乏油条件下弹流油膜凹陷的实验观察  

Experimental Observation on EHL Film Dimple in Starved Simple Sliding Condition

作　　者：孟祥华[1] 张彬彬[1] 王静[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266520

出　　处：《润滑与密封》2016年第8期30-33,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(51275253)

摘　　要：采用光干涉实验技术研究纯滑动条件下,乏油程度对油膜表面凹陷的影响。实验所用润滑油为PB680,PB680具有很高的黏度,有利于油膜表面凹陷的形成。实验结果表明:在低速条件下,随着乏油程度的严重化,凹陷深度逐渐减小,凹陷位置也逐渐向接触区出口方向移动并最后消失;在高速条件下,乏油造成凹陷深度降低,而且在接触区中心出现一个圆形小凹陷;乏油条件也会造成接触区内出现双凹陷现象,当严重乏油时,所有凹陷消失;当载荷降低时,接触区弹性变形减小,减弱了凹陷现象;但乏油条件可增加凹陷的深度。Optical interferometry experiments were performed to investigate the dimple phenomena in starved elastohydrodynamic lubrication （EHL） of point contacts under simple sliding condition.PB680 lubricant owning a high viscosity was used to produce a dimple in the contact area.Experimental results show that,with increasing the degree of starvation, the depth of dimple is decreased and the dimple moves to outlet and eventually disappears under low sliding velocity conditions.Under high sliding velocity ,the depth of dimple is decreased with a small circular dimple appearing at contact center due to the effect of starvation.A double-dimple phenomenon may appear at contact center under starved conditions. Until sever starvation, the dimple fades away.By decreasing the applied load, the elastic deformation of contact is reduced, making the oil phenomenon less obvious.However,the dimple depth is increased by the oil starvation.

关 键 词：弹流润滑 纯滑动 表面凹陷 乏油条件 

分 类 号：TH117.2[机械工程—机械设计及理论]