论文部分内容阅读
1.故障现象1台某型挖掘机在倾斜25°坡道下坡,当操作人员将行走手柄置于中位时,挖掘机先加速下滑,滑行约0.8m后方能缓慢停止,其制动动作明显延迟。2.工作原理该型挖掘机行走制动液压系统主要由行走换向阀1、减压阀2、前进制动单向阀3、平衡阀4、后退制动单向阀5、溢流阀6、高低速阀7、高低速缸8、制动缸9、减速器10、行走马达11等组成,如图1所示。挖掘机在坡道上行驶时,驾驶员将行走手柄置于下坡行驶方向,挖掘机在
1. Trouble phenomenon An excavator at a slope of 25 ° inclined downhill, when the operator will be placed in the middle of the walking handle, the excavator to accelerate the first slip, taxiing about 0.8m before they stop slowly, the braking action Obvious delay. 2. Working principle This type of excavator walking brake hydraulic system is mainly composed of walking directional valve 1, pressure reducing valve 2, forward brake check valve 3, balance valve 4, reverse brake check valve 5, relief valve 6 , High and low speed valve 7, high and low speed cylinder 8, the brake cylinder 9, reducer 10, walking motor 11 and other components, shown in Figure 1. Excavator driving on the ramp, the driver will be walking handle downhill driving direction, the excavator at