摘要
为了研究湿式离合器的接合特性,考虑摩擦副表面温度、相对速度、粗糙度以及载荷对摩擦系数的共同影响,基于流体动力润滑理论、粗糙表面弹性接触理论、吸附热理论以及传热学理论建立了湿式离合器接合过程数学模型。分别讨论了接合压力、摩擦副表面粗糙度、摩擦材料渗透性对接合过程中油膜厚度、相对角速度以及传递转矩的影响规律。结果表明:增大接合压力,转矩响应、相对角速度减小速度以及油膜厚度减小速度都会加快,接合时间缩短,最小油膜厚度减小;减小摩擦副表面粗糙度,转矩响应减慢,但相对角速度减小速度和油膜厚度减小速度都会加快,接合时间缩短,最小油膜厚度减小;增大摩擦材料渗透性,转矩响应和相对角速度减小速度以及油膜厚度减小速度都会加快,接合时间缩短,但最小油膜厚度变化较小。
In order to study the engagement characteristics of wet clutch,the mathematical model of wet clutch engagement process was established based on fluid lubrication theory,rough surface elastic contact theory,adsorption heat theory and heat transfer theory,with the combined effects of friction surface temperature,relative speed,roughness and load on the friction coefficient taken into consideration.The effects of engagement pressure,friction surface roughness,friction material permeability on oil film thickness,relative angular velocity and transfer torque were discussed respectively.The results show that with the increase of the engagement pressure,the torque response,the relative angular velocity reduction speed and the oil film thickness reduction speed are accelerated,but the engagement time is shortened and the minimum oil film thickness is reduced.With the reduction of the friction surface roughness,the torque response slows down,the relative angular velocity reduction speed and the oil film thickness reduction speed are accelerated,the engagement time is shortened,and the minimum oil film thickness is reduced.With the increase of the friction material permeability,the torque response,the relative angular velocity reduction speed and the oil film thickness reduction speed are accelerated,and again the engagement time is shortened,but the minimum oil film thickness barely changes.
作者
王成
秦大同
吴邦治
方宏胜
程坤
WANG Cheng;QIN Datong;WU Bangzhi;FANG Hongsheng;CHENG Kun(School of Automotive Engineering,Chongqing University,Chongqing 400044,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第10期38-51,共14页
Journal of Chongqing University
基金
国家自然科学基金资助项目(U1764259)。
关键词
湿式离合器
接合特性
摩擦系数
温度场
wet clutch
engagement characteristics
friction coefficient
temperature field
