流体黏温特性对液黏调速离合器传动特性的影响  

Effect of Viscosity-Temperature Characteristics on the Behavior of Hydro-Viscous Drive

作　　者：黄家海[1] 方文敏[2] 邱敏秀[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027 [2]解放军炮兵学院,合肥230031

出　　处：《上海交通大学学报》2011年第11期1619-1625,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50475106)

摘　　要：液黏调速离合器主、从动摩擦盘之间存在的转速差会导致油温升高,进而影响其传动性能.以一对摩擦副间隙内流体流场为研究对象(摩擦盘表面无油槽),建立定常、层流条件下的简化数学模型,同时考虑流体黏温特性的影响,运用数值计算方法获得了流场温度、剪应力及转矩的数值解.在此基础上,搭建了液黏传动实验台进行实验验证研究.结果表明:受流体黏温特性影响,输出转矩与输出转速之间呈非线性关系;当其他工作条件不变时,输出转矩随输入流量的增加而增加,尤其在低输出转速段,转矩增量较明显.The object of this work is to investigate the effect of temperature rise resulting from rotary speed difference between driving and driven plates on the performance of hydro-viscous drive.A simplified mathematic model of the steady and laminar flow between two flat plates was established with consideration of viscosity-temperature characteristics.The numerical solution of temperature,shearing stress and viscous torque were obtained by using computational fluid dynamics（CFD） code FLUENT.Then,an experiment rig was designed and developed for this work.The numerical and experimental results show that the relationship between output viscous torque and output rotary speed is nonlinear because of viscosity-temperature characteristics.It also indicates that viscous torque increases as input flow rate increases,and the magnitude of viscous torque increment is significant when the output rotary speed is low.This research provides a theoretical foundation for the optimization of the performance of hydro-viscous drive.

关 键 词：液黏传动 传热 数值计算 

分 类 号：TH137[机械工程—机械制造及自动化]