机械结合面微观接触弹流润滑数值分析  

Numerical Analysis on Micro-elastohydro Dynamic Lubrication of Machine Joint Surfaces

作　　者：王立华[1] 杨竹[1] 陆梓[1] 王鹏程[1] 

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《机械科学与技术》2016年第10期1531-1537,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51165013)资助

摘　　要：结合传统点接触润滑问题和分形接触理论,将与表面形貌相关的微观参数引入部分膜弹流润滑问题,建立了机械结合面在润滑状态下的微观弹流分形点接触分析模型。对该模型进行无量纲化处理后,将其中的Reynolds方程、膜厚方程和载荷平衡方程分别采用有限差分法和二重积分的九点Simpson方法在求解域网格上进行离散,然后分别采用多重网格法和多重网格积分法计算得到润滑油膜压力和油膜厚度的三维分布。从计算结果可得,当微观接触表面具有一定粗糙度时,在出现油膜压力峰位置附近会出现油膜收缩。Combined with the traditional point contact lubrication problem and fractal contact theory, and introduced the microscopic parameters associated with the surface morphology into the partial elastohydro-dynamic（ EHL） lubrication problem,the micro elastohydro-dynamic fractal point contact analysis model is established for the machine joint surfaces on lubrication condition. By non- dimensionalizing these analysis model,the Reynolds equation,film thickness equation and load balance equation are discretized with finite difference method and nine points Simpson method of double integral in the solving domain separately. Then three-dimensional distribution of the oil film pressure and the oil film thickness are calculated using the method of multigrid method and multigrid integration method,respectively. From the calculation results,it can be seen that the oil film shrink phenomenon will appear near the oil film pressure peak when the micro contact surface has certain roughness.

关 键 词：微观弹流润滑 多重网格法 数值分析 分形理论 

分 类 号：TH117.3[机械工程—机械设计及理论]