滚动直线导轨的弹流润滑数值分析  

Numerical Analysis of Elastohydrodynamic Lubrication of Rolling Linear Guides

作　　者：李栋 刘晓玲 周江敏 刘凤麒 Li Dong;Liu Xiaoling;Zhou Jiangmin;Liu Fengqi(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院

出　　处：《机械传动》2019年第11期106-110,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金（51475250）

摘　　要：为研究滚动直线导轨的润滑性能,对LG-45型滚动直线导轨进行了运动分析,建立了导轨副的弹流润滑模型,并对其润滑性能进行了研究,分析了不同接触角、滚珠直径、曲率比、润滑油参数下的油膜厚度,同时讨论了滚珠直径、接触角对导轨副润滑状态的影响。结果表明,在接触角增大时,油膜厚度减小;在滚珠直径增大时,油膜厚度增大;在曲率比增大时,油膜厚度增大,但增加的趋势减小;在相同工况下,润滑油黏度和黏压系数较大时,膜厚较大。在文中研究工况条件下,滚珠直径和接触角变化时不会改变导轨副的润滑状态。In order to study the lubrication performance of rolling linear guides,based on the LG-45 rolling linear guides,the kinematics analysis is carried out.An elastohydrodynamic lubrication(EHL)model is established for the rolling linear guides,and its lubricating performance is investigated.The film thickness with various contact angle,ball diameter,load,curvature ratio and lubricant parameters is analyzed.Effects of the ball diameter and the contact angle on the lubrication state of the guide rail are discussed.The results show that the oil film thickness decreases when the contact angle increases.The oil film thickness increases with the ball diameter increasing.When the curvature ratio increases,the oil film thickness increases,but the increase trend becomes less.Under the same working condition,when the viscosity and viscosity-pressure coefficient of lubricating oil is large,the film is thicker.Variations in the ball diameter and the contact angle cannot change the lubrication state with parameters discussed.

关 键 词：滚动直线导轨 运动分析 油膜厚度 润滑状态 

分 类 号：TG5[金属学及工艺—金属切削加工及机床]