表面微点蚀对渐开线直齿圆柱齿轮弹流润滑的影响  

The Influences of Microscopic Surface Pitting on the Thermal Elastohydrodynamic Lubrication of Involute Spur Gear

作　　者：李超[1] 王优强[1] 王美术[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》2011年第6期55-59,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(50875137)

摘　　要：以渐开线直齿圆柱齿轮为研究对象,建立考虑表面微点蚀的润滑模型,给出相应的膜厚方程。通过改变微点蚀坑的弧度及坑深得到不同形貌的凹坑,利用多重网格法求得各微坑的热弹流润滑数值解,并与光滑解进行对比分析。结果表明:微坑的弧度一定时,坑深或外径的增大会使油膜的中心压力减小,中心膜厚增大;微坑的深度一定时,弧度的增大会使接触区中心处各啮合点的油膜压力随之减小,膜厚随之增大;微坑的边缘是非光滑的,这一区域的数值解波动很大。A gear microscopic surface pitting lubrication model of involute spur gear was established,and the relevant film thickness equation was introduced.By changing the curvature of a micro-pit and the depth of the pit,the pits with different topography were got,a numerical solution of spur gear micro-pit lubrication was obtained based on the multi-grid method,and it was compared with the smooth solution.The results show that when the curvature of the micro-pit is a constant,the central pressure decreases and the central film thickness increases with the increase of the depth or the diameter of the pit.When the depth of the micro-pit is a constant,the pressure of the contact points in the central contact part decreases with the increase of the curvature of the pit,but the film thickness increases.Because of the edge of the pit is non-smooth,the numerical solution of spur gear appears very fluctuant in this area.

关 键 词：表面微坑 渐开线直齿圆柱齿轮 形貌 弹流润滑 

分 类 号：TH117.2[机械工程—机械设计及理论]