接触固体曲率半径对非稳态热弹流润滑的影响  

The Influence of the Curvature Radius of the Contact Solid on Non-steady-state Thermal Elastohydrodynamic Lubrication

作　　者：张建军[1] 刘成龙[1] 

机构地区：[1]青岛理工大学机械工程学院,青岛266033

出　　处：《机械设计与研究》2014年第5期91-93,共3页Machine Design And Research

基　　金：国家自然科学基金资助项目(51305221)

摘　　要：研究接触区的当量曲率半径对弹流油膜性质的影响,利用多重网格法求得非稳态弹流润滑问题。得到了接触固体两种等效曲率半径下的热弹流润滑数值解。数值模拟的结果显示最小膜厚的变化与Hamrock和Dowson的点接触弹流润滑的最小膜厚公式一致。在其他参数不变的情况下,曲率半径增加一倍,油膜的压力大约减小一倍,其第二压力峰变钝变宽;而膜厚增大,但其增加的幅度相比压力的增加要小很多;而温度的变化减小。The influence of the equivalent curvature radius on the oil in the contact region is analyzed. Nonsteady-state thermal elastohydrodynamic lubrication （EHL） is obtained with muhigrid method. Numerical solutions of thermal EHL with two kinds of the equivalent curvature radius are obtained. The results show that the changes of the minimum film thickness are consistent with the minimum film thickness formula for point contact EHL of Hamroek and Dowson. While the other parameters are not changed, the double of the curvature radius makes the oil film pressure decrease half or so, and its second pressure peak becomes dull and wide; when the film thickness is increased, however its increasing amplitude is smaller than the increase of pressure, and the change of temperature is decreased.

关 键 词：热弹流润滑 非稳态 曲率半径 多重网格法 

分 类 号：TH117.22[机械工程—机械设计及理论]