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1.故障现象1台使用6年的徐工履带式XM200型路面铣刨机(工作时间10040h),启动后操纵行走手柄时,出现无法前进和后退故障。2.行走液压系统工作原理该铣刨机行走液压系统为闭式回路,行走泵为电比例柱塞泵,4个行走马达为定量柱塞马达。行走速度的快慢通过改变行走泵输入电流信号的大小来改变其斜盘倾斜角度,以调节其排量。当行走手柄给控制器输入模拟电压信号
1. Symptom One XCMG crawler XM200 pavement milling machine (working time: 10040h), which has been used for 6 years, can not move forward and backward when it is used to manipulate the walking handle after starting. 2. Walking hydraulic system works The milling machine walking hydraulic system for the closed loop, electric pump for the proportional piston pump, 4 walking motor for the quantitative plunger motor. Speed of walking by changing the size of the pump input current signal to change its tilt angle of the swashplate to adjust its displacement. When the walking handle to the controller input analog voltage signal