The investigation of effects of surface grooves on friction disc on drag torque and heat dissipation in wet clutches
XU Chengfa1，ZHANG Kun2，ZHANG Deng1，ZHANG Guohong1，WEI Bingzhen2，
HU Zheng3
（1. Hangzhou Qianjin Gear Box Group Co., Ltd., Hangzhou 311203, China; 2.Institute of Mechanics, Chinese
Academy of Sciences, Beijing 100190, China; 3.North China Vehicle Research Institute,Beijing 100072, China）
Abstract：The friction pairs in wet clutches can cause drag torque and associated energy loss, when friction discs
are not engaged, due to the viscous fluid nature of the lubricant subjected to relative motion between the friction
pairs. This phenomenon is detrimental to the service life of wet clutches and causes concern of risk. In addressing
this issue, based on the Navier-Stokes equation, a total of 12 groove designs with 24 configurations are designed
and analyzed by means of finite element numerical simulation to explore the methods of reducing the drag torque
and energy loss. The results show that the combination of spiral groove and radial non-slot design has good cooling
effect and high dynamic friction coefficient. This paper provides an important reference for the design of friction
pairs oil grooves, which is of great significance for guidance.
2024, Vol. 34 
