Jixie chuandong (Mar 2020)
Study on Lubrication Characteristic of Cylindrical Roller Tripod Coupling based on Time-varying Squeeze Effect
Abstract
The motion between the cylindrical roller and the slider groove of the tripod coupling is simplified as the motion between the cylinder and the infinite plane. With consideration of the unsteady state effect and time-varying squeeze effect in the running process of coupling，the numerical calculation model of linear contact thermal elastohydrodynamic grease lubrication is established. The transient solutions of lubrication parameters such as film pressure，film thickness and average temperature rise of lubricating oil film are obtained by using multi-grid method. The transient solutions are compared with the steady-state values. The results show that the transient solution and the steady solution of lubricating oil film characteristics are not much different when the variable effect is in the low frequency state. While in the high frequency state，the oil film thickness is smaller than the steady solution as a whole，and the temperature rise is particularly obvious. The distributions of high-frequency solution and low-frequency solution are almost same while the film thickness of high-frequency state is lower significantly than that of low-frequency state in a period of impact load.
