多片离合器接合过程热流分配系数和温度变化规律  

Heat Partition Coefficient and Temperature Variation during Engagement in Multi-disc Clutch

作　　者：袁跃兰[1] 陈漫[2] 李世红[1] Yuan Yuelan;Chen Man;Li Shihong(Department of Mechanical and Electronic Engineering,Guizhou Communications Polytechnic,Guiyang 550008,China;School of Mechanical and Vehicle Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]贵州交通职业技术学院机电工程系,贵州贵阳550008 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《机械传动》2020年第2期37-41,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金（51175042）

摘　　要：建立多片离合器摩擦元件接合传热过程的有限元计算模型,使用耦合计算方法研究了摩擦元件在单次等初速接合与等时间接合过程中的热流分配系数及温度变化过程,并对温度进行无量纲化处理和对比。结果表明,在两种接合过程中,热流分配系数都会高于定速滑摩工况,且在最后阶段都会迅速上升并接近于1;等初速接合过程的油压会影响接触面的最高温度,存在一个临界接合油压,使接触面峰值温度比其他接合油压情况都低,有利于摩擦元件的热稳定;在不同初始速度下的等时间接合过程中,改变接合油压会影响接合过程,但并不改变热流分配系数和无量纲温度的变化过程,这便于快速计算接合过程摩擦元件的温度水平。A finite element model of heat conduction process between the friction components in a multidisc clutch is setup.With coupled algorithm,the heat partition coefficient between friction components in multi-disc clutch and the temperature variations in the cases of engagement with the same initial rotating speeds and the same time are studied.The temperature field is non-dimensionalized and compared,the results show that,during both cases of engagement,the heat partition coefficients are higher than that of sliding with fixed rotating speed and approach to 1 rapidly at the end of engagement.The contact pressure in the case of engage⁃ment with the same initial rotating speed makes influence on its peak temperature,and thus there exists a criti⁃cal pressure with which the lowest peak temperature can be obtained.This critical pressure benefits the thermal stability of the multi-disc clutch.In the case of engagement with the same time,the heat partition process will not change even though the contact pressure is changed,and the variation processes of the dimensionless tem⁃perature will not be changed neither.This will facilitate the thermal status estimation of the clutch.

关 键 词：车辆工程 多片离合器 热流分配系数 等初速接合 等时间接合 

分 类 号：U463.211[机械工程—车辆工程]