我公司综采工作面的主力设备MXA-300/3.5型采煤机在使用过程中牵引部频繁出现故障而无法正常运行。其故障表现为:牵引速度下降、高温不退、密封件破坏,最终导致主轴泵经常损坏。若换1台主泵需投入1万余元,加上使用期间油耗太大,误时误工,造成综采工作面产量和效益明显下降。为 The main equipment MXA-300 / 3.5 shearer of the fully mechanized mining face of our company frequently fails and the traction unit can not operate normally during use. The fault performance as follows: traction speed decline, high temperature without retreat, seal damage, eventually leading to frequent damage to the spindle pump. If you want to change a main pump to invest 1 million yuan, coupled with fuel consumption during use is too large, mistakenly working hours, resulting in fully mechanized face production and benefits decreased significantly. for