振动冲击下接触固体滑动方向对润滑的影响

The Influence of Sliding Direction on Lubrication Subjected to Vibration Impact

采用多重网格法和多重网格积分法分别求解压力和弹性变形,采用双向逐列扫描温度求解温度控制方程,研究接触固体承受法向振动冲击下接触表面反向滑动的非牛顿润滑问题。结果显示:振动冲击将造成油膜压力、膜厚和温度的剧烈变化;挤压效应将造成油膜压力的剧增和温度的升高;而分离效应将造成油膜压力的剧降,但润滑不会失效;与同向相比,反向滑动的压力和膜厚小于对应瞬时的同向滑动值,而温度则高于同向滑动值,反向运动不利于润滑。

The non-Newtonian elastohydrodynamic lubrication（EHL）under reverse sliding contact surface subjected to vibration impact was researched by calculating the pressure and elastic deformation by a multi-grid technique and a multi-level multi-integration method separately,and solving the temperature equation by the double-direction sequential column sweeping process.It is shown that vibration impact will cause radical changes of the oil film pressure,film thickness and temperature.Squeeze effect will lead to a surge in the oil film pressure and temperature rise.And the separation effect will cause the oil film pressure sharply reduced,but not lubrication failure.Compared with the same direction,reverse slide cause pressure and film thickness less,the temperature higher,and also against for lubrication.