干式离合器摩擦片摩擦系数测试台架设计

摘要

For automatic dry clutches,it is important to obtain the accurate friction torque to improve the control effect of the clutch.And the precision of the friction torque is largely dependent on the precision of the friction coefficient.So in order to analyze the relationship among friction coefficient,clamping force,rotate speed and surface temperature of dry clutch plates,a friction coefficient measurement bench is designed.The bench is made up of the mechanical system,the servo-motor control system and the data acquisition system.The mechanical system is composed of a base,a speed reducer,a spring and so on,it is mainly to achieve the manual pressure adjustment.The servo motor control system consists of a touch screen,a PLC controller,a servo motor drive and so on,it is mainly to achieve the control of the motor speed and direction.The data acquisition system consists of a single-chip,a computer and so on,it is to achieve the function of data acquisition and display.The experiments showed that the bench had the functions of controlling clamping force and rotate speed,and it could also collect signals of clamping force,rotate speed,friction torque,surface temperature and friction coefficient synchronously.The bench plays an important role in the friction coefficient research.%在自动干式离合器中,获得精确的摩擦转矩对提高离合器的控制效果有着重要影响.而摩擦转矩的精确度很大程度上依赖于摩擦系数的精确度.因此为了研究干式离合器摩擦片的摩擦系数与压力、转速和滑磨过程中摩擦片表面温度的关系,设计了干式离合器摩擦片摩擦系数测试台架.该台架由机械系统、伺服电动机控制系统和数据采集系统组成.机械系统由底座、减速机和弹簧等组成,主要实现压力的手动调节功能;伺服电动机控制系统由触摸屏、PLC控制器和伺服电动机驱动器等组成,主要实现电动机转速和转向的控制;数据采集系统由单片机和计算机等组成,实现所有数据的采集和显示功能.经实验验证,该台架可以实现压力和转速的控制并完成压力、转速、摩擦转矩、摩擦片表面温度和摩擦系数的同步采集,在干式离合器摩擦系数影响因素的研究中起到了重要作用.