限制间隙条件下的点接触EHL特性分析  

Point Contact Elastohydrodynamic Lubrication in Confined Gap

作　　者：刘广媛[1] 郭峰[1] 栗心明[1] 

机构地区：[1]青岛理工大学机械工程学院,青岛266033

出　　处：《机械工程学报》2014年第13期122-128,共7页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51275252);国家重点基础研究发展计划(973计划;2011CB706602)资助项目

摘　　要：在经典的弹性流体动力润滑理论中,两接触体处于开放的空间中,其相对位置由施加的外载决定,即油膜压力的计算要满足载荷平衡条件。而当弹流润滑发生在限制空间中时,如滚动轴承中的润滑,接触体的相对位置受系统的约束,传统弹流理论并不能用于该工况下的润滑特性预测。本文对限制间隙条件下等温点接触弹流润滑问题进行了数值分析,研究了速度参数、材料参数和刚性间隙H00对油膜厚度和承载力影响。根据计算结果,回归出新的承载力以及膜厚计算公式。另外,对限制间隙条件下的润滑油膜特性进行了试验观察,将结果与数值分析进行了对比。In traditional elastohydrodynamic lubrication （EHL） theory,it is assumed that the contact pairs are in open space,and the locations of lubricated bodies are determined exclusively by the applied loads.However,this principle cannot be applied to EHL in confined spaces where the relative position of the contact surfaces are restricted by others components,such as those in rolling bearings.Full numerical analyses have been carried out for point-contact isothermal EHL with confined gaps whereby the rigid separation of the two contact bodies is fixed,and the influences of working parameters such as speed,material and rigid separation H00 on the film thickness and load-carrying capacity have been revealed.New loading capacity and film thickness formulas are obtained from the numerical data with small errors.Experiments are also carried out,showing correlation with the theoretical results.

关 键 词：弹性流体动压润滑 限制间隙 承载力 油膜厚度 

分 类 号：TH117[机械工程—机械设计及理论]