Jixie chuandong (Jan 2019)
Numerical Analysis of Elastohydrodynamic Lubrication of Rolling Linear Guides
Abstract
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.
