摘要
液力缓速器是把车辆的动能转化为工作介质的热能,实现平稳刹车的一种辅助制动装置。因其作用过程制动转矩大、过程平稳、寿命长、散热性能好等特点,在重载、高速运行的车辆上应用广泛。文中通过分析液力缓速器工作介质的流动特性,对工作介质微团所受的作用力进行分析,基于欧拉束流理论建立液力缓速器能量耗散方程,得出液力缓速器制动转矩的值取决于摩擦功的大小,而摩擦功与工作介质的粘度及应变速率的平方成正比。最后指出液力缓速器机械设计的核心在于限制工作介质的流态,为液力缓速器设计计算奠定理论基础。
The hydraulic retarder is auxiliary brake equipment that turns the moving energy to the heat to brake placidity. It has the advantage of big torque, placidity, good heat disperse and long life so it is widely used in heavy, high speed vehicle. Energy dissipating formula of hydraulic retarder was set up in the paper by analyzing the working medium flow characteristic and the force of the working medium micro point,on the base of Eula theory,which drew a conclusion that the torque of hydraulic retarder was decided by the friction work which had relation with the working medium and the strain rate square. Last the paper points to the core of the mechanism design is to limit the flow form of working medium and settles the theory foundation of the hydraulic retarder design.
出处
《机械设计》
CSCD
北大核心
2014年第3期80-84,共5页
Journal of Machine Design
基金
星火计划资助项目(2011E000040)
关键词
液力缓速器
内部流动特性
能量耗散方程
hydraulic retarder
inner flow characteristic
ener- gy dissipating formula
