变卷吸速度的点接触热弹流润滑分析  

Thermal Elastohydrodynamic Lubrication with Time-dependent Entrainent Velocties

作　　者：张建军[1] 杨沛然[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》2007年第1期62-67,共6页Lubrication Engineering

基　　金：山东省自然科学基金项目(Z2003F01);青岛市科技局基金项目(03-2-JZP-15)

摘　　要：非稳态热弹流润滑一直是研究的热点和难点,针对变卷吸速度的点接触热弹性流体动力润滑问题,利用多重网格积分法,得到变卷吸速度的点接触热弹性流体动力润滑完全数值解。结果表明:卷吸速度的变化会引起油膜压力、膜厚和温度的变化;当卷吸速度变化到一定值时,在接触区会产生油膜的凹陷;凹陷的产生可用“温度-粘度楔”机制解释。The study of non-steady state thermal elastohydrodynamic lubrication is always important and difficult. Based on the multilevel techniques, a full numerical solution was obtained for thermal elastohydrodynamic lubrication point contact with time-dependent entrainment velocities. Results show that pressure, film thickness and temperature are changed with variation of the entrainment velocity;film profiles featuring a dimple can be formed in the contact zone when the entrainment velocity exceeds a certain level;the formation of dimple can be explained by the temperature-viscosity-wedge effect.

关 键 词：热弹性流体动力润滑 点接触 时变效应 卷吸速度 凹陷 

分 类 号：TH117.2[机械工程—机械设计及理论]