制动器弹子加压机构全行程增力系数研究

Research on full-stroke transfer coefficient of brake’s ball-plate forcing mechanism

文中针对履带车辆的机动性和制动效率问题,对影响干片式制动器弹子加压机构进程与回程中力传递性能的增力系数进行研究。根据弹子加压机构的运动特点和结构特点,建立了弹子加压机构全行程力学模型,推导了弹子加压机构进程和回程增力系数函数,分析了弹子槽倾角和摩擦因数对增力系数的影响规律。结果表明,进程增力系数与试验结果相近,进程增力系数远大于回程增力系数,合理的弹子槽倾角与摩擦因数能够提高干片式制动器的制动效率和可靠性。

In this article,with the focus on mobility and braking efficiency of tracked vehicles,efforts are made to explore the transfer coefficient of transmission performance which has influence on the dry-disc brake’s ball-plate forcing mechanism in the process of proceeding and returning.According to the dynamic and structural characteristics,a full-stroke mechanical model of the ball-plate forcing mechanism is set up,and the transfer coefficient of the ball-plate forcing mechanism in the process of and returning is derived.Besides,the analysis is conducted on the law of influence on the transfer coefficient exerted by the spiral raceway inclination angle and the friction coefficient.The results show that the proceeding transfer coefficient,which is consistent with the experimental result,is much larger than the returning transfer coefficient.It is of great significance to choose reasonable spiral raceway inclination angle and friction coefficient,in order to improve the dry-disc brake’s braking efficiency and reliability.