空载湿式离合器临界碰摩转速影响机理分析  

Influence mechanism of critical rub-impact speed of no-load wet clutch

作　　者：张琳 张源盛[1] 李军 臧磊 魏超 严运兵[1] ZHANG Lin;ZHANG Yuansheng;LI Jun;ZANG Lei;WEI Chao;YAN Yunbing(College of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430065,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;National Key Laboratory of Special Vehicle Design and Manufacturing Integration Technology,Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014030,China;Science and Technology on Vehicle Transmission Laboratory,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430065 [2]浙江大学流体动力基础件与机电系统国家重点实验室,浙江杭州310027 [3]内蒙古第一机械集团股份有限公司特种车辆设计制造集成技术全国重点实验室,内蒙古包头014030 [4]北京理工大学坦克传动国防科技重点实验室,北京100081

出　　处：《武汉科技大学学报》2024年第3期190-199,共10页Journal of Wuhan University of Science and Technology

基　　金：湖北省自然科学基金项目(2023AFB084);浙江大学流体动力基础件与机电系统国家重点实验室开放基金课题(GZKF-202318);内蒙古第一机械集团股份有限公司特种车辆设计制造集成技术全国重点实验室开放课题(GZ2023KF004);教育部“春晖计划”合作科研项目(HZKY20220330);湖北省教育厅科学研究计划指导项目(B2022027).

摘　　要：定义空载湿式离合器摩擦片/钢片的周期无量纲轴向位移范围λ,根据其值确定湿式离合器的临界碰摩转速。通过分析润滑油温度、供油流量、摩擦副间隙与特征量λ变化趋势的关系,得到工况参数对湿式离合器临界碰摩转速的影响规律。从力学角度出发,分析流场刚度和阻尼的变化规律,探寻摩擦片/钢片三自由度运动的影响因素,在此基础上提出流场临界刚度和临界阻尼的概念,揭示湿式离合器工况参数对其临界碰摩转速的影响机理,并进行了试验验证。研究结果表明:润滑油温度升高或摩擦副间隙增大会导致流场中的交叉刚度系数和交叉阻尼系数变大,湿式离合器的临界碰摩转速降低;供油流量增大会导致流场中的交叉刚度系数和交叉阻尼系数减小,湿式离合器的临界碰摩转速升高。The periodic dimensionless axial displacement rangeλof friction plate/steel plate in no-load wet clutch was defined,and according to its value,the critical rub-impact speed of wet clutch was determined.By analyzing the relationships of lubricant temperature,oil supply flow and friction pair clearance with the variation trend of characteristic quantityλ,the influences of working parameters on the critical rub-impact speed of wet clutch were acquired.From the view of mechanics,variation of stiffness and damping in the flow field was studied,and factors influencing the 3-DOF motion of the friction plate/steel plate were explored.On this basis,concepts of critical stiffness and critical damping in the flow field were proposed,and the influence mechanism of working parameters of wet clutch on its critical rub-impact speed was revealed and verified by experiments.The results show that,a higher lubricant temperature or a wider friction pair clearance leads to larger cross stiffness coefficient and cross damping coefficient in the flow field,resulting in a lower critical rub-impact speed of the wet clutch.Conversely,an increase in oil supply flow reduces cross stiffness coefficient and cross damping coefficient in the flow field,which leads to a higher critical rub-impact speed of the wet clutch.

关 键 词：湿式离合器 碰摩转速 带排转矩 流固耦合 工况参数 

分 类 号：TH132[机械工程—机械制造及自动化]