界面滑移条件下点接触Stribeck曲线的实验研究  

Experimental Study on the Stribeck Curve of EHL Contacts under Conditions of Wall Slippage

作　　者：贾超[1] 郭峰[1] 付忠学[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《润滑与密封》2010年第1期33-36,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(50875136);教育部新世纪优秀人才支持计划资助项目(NCET-07-0474)

摘　　要：采用高黏度聚异丁烯润滑油,在光学弹流实验机上考察球-盘接触纯滑条件下的摩擦因数随卷吸速度和载荷的变化。结果表明,随着卷吸速度的增加,球-盘接触副进入弹流润滑并向流体动压润滑转变的过程中,摩擦因数并不像传统的Stribeck曲线一样,随着卷吸速度的增加而单调增加,而是呈现先上升、后下降、再上升的趋势,其中摩擦因数下降时的起始速度大致为凹陷出现的速度,摩擦因数再上升时的速度大致是润滑进入动压润滑的速度。初步论证界面滑移为产生上述波动的主要原因。The variation of friction coefficient of high viscosity polyisobutylene lubricant with entrainment speeds and loads were investigated under pure sliding conditions in an optical elastohydrodynamic lubrication （EHL） test rig. The resuits show that the friction coefficient first increases with increasing entrainment speeds and then decreases and increases again at last when the contact is in EHL and hydrodynamic lubrication （HL） regimes,while in classical Stribeck curves, the friction coefficient increases with increasing entrainment speeds monotonically in full film regimes;the velocity when the friction coefficient declines generally corresponds to the velocity when the inlet dimple is formed, and the velocity when the friction coefficient increases corresponds to the velocity when the contact enters the stage of HL. The experimental observation is tentatively attributed to the wall slippage.

关 键 词：弹流润滑 STRIBECK曲线 摩擦因数 界面滑移 

分 类 号：TH117[机械工程—机械设计及理论]