液粘离合器摩擦特性及热负荷特性研究  

Friction and Thermal Load Performance of a Viscous Clutch

作　　者：郭刘洋[1] 杜明刚[1] 

机构地区：[1]中国北方车辆研究所车辆传动重点实验室,北京100072

出　　处：《摩擦学学报》2011年第4期323-327,共5页Tribology

基　　金：车辆传动重点实验室基金项目(9140C3404010904)资助~~

摘　　要：本文针对新型液粘离合器的摩擦系数和热负荷进行试验研究,其中摩擦系数是液粘离合器特性的核心衡量指标,通过摩擦学理论研究,确定液粘离合器的摩擦状态,找到适用的试验方法对其进行了测试计算,根据结果进行分析,得出液粘离合器在不同转速差、不同入口油温以及不同正压力的摩滑状态时摩擦系数的变化趋势,并得到不同转速差对摩擦系数的影响公式;应用润滑油流量和摩擦功率损失计算液粘离合器的热平衡温度,并通过试验对摩擦片的热负荷进行了研究,对比分析液粘离合器热量散失的方式,发现液粘离合器摩擦片摩滑状态的热负荷计算公式有待改进;针对摩擦片轴向温度分布不平衡,制定了润滑流量的匹配结构优化方案.Experimental investigation of friction coefficient and thermal load for a new viscous clutch were conducted and the friction coefficient is found to be the key specification for characterizing the viscous clutch.Based on the thoery on tribology,the lubricating regime was first verified,and an appropriate test methodology was employed to test and compute the viscous clutch.The test results was used to analyze the variation of friction coefficient when the viscous clutch operated at various relative rotating speed,input temperature and pressure.In addition,an equation which descirbed friction coefficient of viscous clutch at different relative rotating speed was established.The temperature of viscous clutch at thermal equilibrium was calculated by applying the flowing rate of lubricant and frictional power loss.Based on the result for the thermal load of viscous clutch and comparison on heat dissipation of viscous clutch,it is found that the equation to calculating the thermal load that described the frictional regime of frictional disc of viscous clutch need developing.As the axial temperature on frictional set is unbalanced,the flowing rate of lubricant should be optimized based on its configuration and a proposal for the optimization should be made accordingly.

关 键 词：液粘离合器 摩擦系数 热负荷 试验测试 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]