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为了更准确地研究具有凸轮张开装置的领、从蹄式制动器系统的力学行为,在凸轮轴上施加输入力矩来模拟仿真制动器系统的制动过程,并通过ADAMS动力学仿真软件进行仿真分析。计算结果表明:具有凸轮张开装置的领、从蹄式制动器系统在制动过程中,领蹄制动力矩远大于从蹄;由于非线性摩擦因数等的影响,领、从蹄在制动过程中一直处于随机振动状态,且领蹄振动程度随着车速的提高而明显增大;领蹄的制动摩擦衬片上的切向摩擦力(或衬片上的正压力)分布为中部大、两侧小,而从蹄摩擦衬片上的切向摩擦力分布为上部大、下部小,且从蹄切向摩擦力远小于领蹄切向摩擦力;从蹄促动力大于领蹄促动力,在凸轮输入力矩相等的情况下,领、从蹄促动力不随车速发生变化。
In order to study the collar with cam-opening device more accurately, the input torque is applied to the camshaft to simulate the braking process of the brake system and the simulation analysis is carried out by ADAMS dynamic simulation software from the mechanical behavior of the shoe-brake system. The calculation results show that the braking torque of collar-hoof during the braking process is higher than that of slave-hooves with collar opening and cam-releasing device. Due to the influence of nonlinear friction coefficient and so on, In the random vibration state, and the vibration amplitude of the collar hoof increased significantly with the increase of the vehicle speed. The tangential friction force (or the positive pressure on the lining plate) Small, while from the hoof friction lining tangential friction distribution for the upper large, lower small, and from the hoof tangential friction is far less than the tangential friction; from the hoof power is greater than the hoof motivation, the cam input Torque equal circumstances, collar, from hoof motivation does not change with the speed.