波动表面的等温弹流润滑分析  

Analysis of Isothermal Elastohydrodynamic Lubrication with Surface Waviness

作　　者：谭洪恩[1] 杨沛然[1] 周志梅 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033 [2]青岛大学高等职业技术学院,山东青岛266101

出　　处：《润滑与密封》2008年第3期17-20,25,共5页Lubrication Engineering

基　　金：国家自然科学基金资助项目(50575108);青岛市科技发展基金资助项目(05-1-JC-94)

摘　　要：对具有波动表面的弹流润滑问题建立了数学模型,得到一种普遍的波动表面的点接触非稳态弹流数值算法。以准稳态解为初始条件,逐个周期求出了波动表面的等温牛顿流体弹流润滑的数值解,研究了两接触表面均带横向或纵向粗糙度的等温弹流润滑问题,分析了粗糙峰对压力和膜厚的时变影响,对比了接触表面带不同粗糙度的润滑性能,讨论了幅值和波长对压力和膜厚的影响。结果表明:接触区两表面的粗糙峰的叠加将产生更高的局部压力峰,膜厚变薄,粗糙峰的振幅越大,波长越短,对点接触弹流润滑越不利。Mathematic model and general numerical solutions of Newtonian transient elastohydro-dynamic lubrication(EHL)of point contacts with surface waviness were developed.Started from a quasi-steady state solution,numerical solutions of isothermal EHL with surface waviness were obtained step by step and period by period,for the two-sided surface waviness composed by both transversely oriented waviness and longitudinal waviness,the transient influence of surface waviness on the pressure and film thickness was analyz...

关 键 词：弹流润滑 波动表面 点接触 时变效应 

分 类 号：TH117.2[机械工程—机械设计及理论]