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一台维特根1000C型铣刨机在作业 过程中,突然出现前轮过度制动(此种 铣刨机只在前轮有制动装置)的故障, 导致不能正常作业,后未经维修又恢复 了正常。分析认为有两种可能:一是控 制制动的液压系统有故障;二是控制制 动电磁阀的电路系统有故障。 首先检查液压系统(见图1)。主泵 Q1的辅助泵供给压力油,压力油经制动 电磁阀右位、手控阀图示位置进入前轮 制动缸,克服制动缸弹簧力解除制动; 另有一路压力油来自转向系统,转动转 向盘。当手控阀杆在垂直位置时,压力 油经手控阀进入制动缸克服弹簧力解
A WITTEN 1000C milling machine in the course of the job, suddenly appeared in front of the wheel over brake (this milling machine only in the front wheel brake device) failure, resulting in not working properly, and then restored without repair Normal Analysis that there are two possibilities: First, the hydraulic system to control braking failure; second is to control the braking solenoid valve circuit system failure. First check the hydraulic system (see Figure 1). The main pump Q1 pump supply pressure oil, pressure oil by the brake solenoid valve right position, manual valve position into the front wheel brake cylinder to overcome the brake cylinder spring force to lift the brake; the other way the pressure oil from the steering System, turn the steering wheel. When the manual valve stem in the vertical position, the pressure oil into the brake cylinder by manual valve to overcome the spring force solution