考虑固体颗粒和粗糙度的水润滑飞龙轴承热弹流润滑性能分析  

Thermal Elastohydrodynamic Lubrication Property Analysis of Water-lubricated Tenmat Bearing Considering Debris and Surface Roughness

作　　者：王优强[1] 董宁[1] 刘前[1] 黄兴保 

机构地区：[1]青岛理工大学机械工程学院,青岛266520

出　　处：《机械工程学报》2017年第3期121-129,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51575289);青岛科技计划(12-1-4-4-(2)-JCH)资助项目

摘　　要：建立考虑固体颗粒的滑动轴承的无限长线接触几何模型,推导出含固体颗粒的Reynolds方程,考虑温度、固体颗粒以及表面粗糙度对轴承润滑的影响,通过数值方法分析不同颗粒位置、不同颗粒尺寸以及轴承表面粗糙度对压力和膜厚的影响,并与不含固体颗粒的热弹流解进行对比。结果表明:考虑热效应时,在固体颗粒处压力骤增;膜厚整体减小。随着固体颗粒位置向出口方向移动,在固体颗粒处压力波动幅度增大,膜厚整体减小;颗粒尺寸越大,膜厚越小;通过固体颗粒接触区后的压力随着相对间隙的减小而增大;同时考虑固体颗粒和粗糙度时,在固体颗粒处压力波动幅度增大,最小膜厚减小。The infinite line contact geometric model of bearing with debris is set up,and the Reynolds equation with debris is deduced.The effects of debris position,debris size and surface roughness on the pressure and film thickness are discussed by the numerical simulation when considering the effect of temperature,debris and roughness,compared with the corresponding thermal EHL analysis which without debris.The results show that,there is an obvious pressure build-up over the debris.The film thickness is decreased with debris.With the debris moving toward the exit,the pressure volatility increases,the overall film thickness decreases.The large the debris size,the smaller the film thickness.The pressure throughout the contact zone after the location of the stationary debris is increased with the relative gap decreases.When taking into account the debris and surface roughness,the pressure volatility increases,the minimum film thickness decreases.

关 键 词：固体颗粒 水润滑 飞龙轴承 热弹流 

分 类 号：TH133[机械工程—机械制造及自动化]