湿式离合器接合过程中的热弹性稳定性  

Thermoelastic stability of wet clutches during engaging process

作　　者：赵家昕 马彪[1] 李和言[1] 朱莉[2] 韩明[2] 朱礼安 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中国北方车辆研究所北京100072 [3]江麓机电集团公司,湖南湘潭411100

出　　处：《吉林大学学报（工学版）》2015年第1期22-28,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51175042);基础产品创新计划项目(VTDP2102,VTDP3203);装备预先研究项目(40402070102)

摘　　要：针对湿式离合器接合过程中的局部高温区及影响因素,利用热弹性不稳定性理论(TEI)进行了理论建模与分析。模型中考虑了材料表面粗糙度和混合润滑对摩擦副温度和压力的影响,分析了混合润滑状态下润滑区域与接触区域的比例以及油膜剪切热量与摩擦热量的比例。为了准确测量材料表面粗糙度,设计台架试验,利用表面形貌仪测试了对偶片表面形貌,分析了粗糙度在离合器不同使用阶段的变化规律。结果表明,当离合器接合转速超过临界值时,温度场分布出现明显的波动,高、低温区间隔分布。同时,指出了离合器摩擦材料参数(导热性、弹性)与结构参数(对偶片厚度)对稳定性的影响。Abstra investi effects ct ： On gate t of th the basis of Thermoelastic Instabilit he local hot zones and influence fac e surface roughness and the mixed y （TEI） th tots of wet lubrication eory, a theoretical model is propo clutches during engaging process on the temperature and pressure sed to ~ The of the friction pair are considered. Under mixed lubrication, the ratios of the lubrication area to the contact area and the fluid shear velocity induced heat flux to the frictional heat flux are calculated. A plasmon resonance analyzer is used to investigate the variation of the surface roughness in different stages~ The results show that strong inhomogenous temperature field, hot zones and cold zones appear when the clutch engaging speed exceeds the threshold. The material properties, such as thermal conductivity and elasticity, and structural properties, such as the thickness of the matting disk, significantly influence the stability of the system. Key words： vehicle engineering; wet clutch; thermoelastic instability; surface roughness; mixed lubrication; hot spots

关 键 词：车辆工程 湿式离合器 热弹性不稳定性 表面粗糙度 混合润滑 局部高温区 

分 类 号：U463.2[机械工程—车辆工程]