人工关节弹流润滑供液条件分析  

Analysis of Liquid Supply Condition in EHL Contacts of Human Joints

作　　者：郇艳[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》2008年第5期15-18,共4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：在人工关节弹流润滑中,如果润滑剂供应不足,则会出现乏液现象。分析了球坐标系下不同的供液膜厚、载荷及径向间隙对乏液润滑行为的影响。结果表明:当供液膜厚较小时,压力区也较小,乏液现象较严重,但润滑液利用率较高。当载荷逐渐增大时,压力区增大,润滑液膜产生的压力变大,液膜起始处膜厚值也较大。径向间隙越大,压力区越小,润滑液膜产生的压力越高,液膜起始处的膜厚值也越大,但起始位置更接近于接触区中心。In the elastohydrodynamic lubrication(EHL) of human joints,if the lubricant is not supplied enough,there will appear the phenomenon of liquid starvation.The effects of various effective film thicknesses of the supplied liquid layers,loads and radial clearances on the starved phenomenon were investigated under spherical coordinate system.The results show that,when the liquid thickness of the supplied liquid layer is smaller,the formation position of the lubricating film is also smaller and the starvation phe...

关 键 词：乏液 人工关节 球坐标系 供液液膜 弹流润滑 

分 类 号：TH117.2[机械工程—机械设计及理论]