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1 问题提出 ＤＦ7Ｄ型机车在我局黔桂线的金城江至麻尾区段担当客货运列车的牵引任务 ,该区段的线路纵断面变化较复杂 ,因此机车需要在不同的工况下 (牵引工况、制动工况 )频繁地交替工作。在实际运用中 ,工况转换开关故障现象时有发生 ,若不能及时发现故障隐患 ,查找原因
1 PROBLEMS It is proposed that the DF7D locomotive should be used as a towing task for passenger and freight trains between the Jincheng River and Ma tail sections of the Guizhou-Guangxi coastline. The changes of the longitudinal profiles of the sections in this section are complicated. Therefore, locomotives need to be under different working conditions Conditions, braking conditions) frequently alternating work. In actual application, the phenomenon of the working condition changeover switch sometimes occurs. If the hidden trouble of the trouble can not be found in time, find the reason