单凹坑点接触弹流润滑特性的数值分析  

Numerical Analysis on Single Dent in EHL Point Contacts

作　　者：王学锋[1] 胡如夫[1] 程晓民[1] WANG Xuefeng;HU Rufu;CHENG Xiaomin(School of Mechanical Engineering,Ningbo University of Technology,Ningbo 315211,China)

机构地区：[1]宁波工程学院机械工程学院,浙江宁波315211

出　　处：《宁波工程学院学报》2020年第4期24-30,共7页Journal of Ningbo University of Technology

基　　金：浙江省自然科学基金项目(LY17E050007);宁波市自然科学基金项目(2018A610149)。

摘　　要：为了了解单凹坑点接触弹流润滑问题的润滑特性,建立了其控制方程,考察了简化弹性模量、凹坑半径及凹坑深度对油膜厚度及压力的影响。结果表明,最小膜厚出现在凹坑的左侧或颈缩处。凹坑半径及凹坑深度显著地影响了整体油膜厚度,简化弹性模量主要改变油膜曲线的局部特征。简化弹性模量及凹坑半径的增大使得最大压力增大,凹坑深度的增大使得最大压力减小。凹坑半径的增大使得中心压力减小,凹坑深度的增大使得中心压力增大,简化弹性模量几乎不影响中心压力。In order to understand the effect of the single dent on the lubricating properties of EHL point contacts, its governing equations were established. The variations of the film thickness and pressure induced by the reduced elastic modulus, the dent radius and the dent depth were investigated. The results show that the minimum film thickness arises on the left side of the dent or at the outlet constriction. The dent radius and the dent depth remarkably affect the overall film thickness whereas the reduced elastic modulus mainly decides the local features of the film curve.The increase of the reduced elastic modulus or the dent radius increases the maximum pressure whereas the increase of the dent depth reduces it. Increasing dent radius decreases the central pressure whereas increasing dent depth increases it. In addition, the reduced elastic modulus hardly affects the central pressure.

关 键 词：单凹坑 点接触 弹流润滑 最小膜厚 

分 类 号：TH117[机械工程—机械设计及理论]