论文部分内容阅读
DF7A、B型机车为目前我国大部分站段所采用的调车用机车,但是投入使用多年来,机油压力低一直是其使用的惯性故障,DF7A、B型机车在其主润滑油路未端安装有压力继电器YK2、YK4,当主油道末端压力低于3·0 MPa时,YK2动作,柴油机卸载,主油道末端压力低于0·5 MPa时,YK4动作,柴油机不
DF7A and B locomotives are the shunting locomotives currently used in most of the stations in our country. However, when put into service for many years, the low oil pressure has always been the inertia failure of DF7A and B locomotives at the end of their main lubricating oil road YK2 and YK4 are installed. When the pressure in the end of the main oil passage is lower than 3.0 MPa, YK2 acts and the diesel engine is unloaded and the pressure in the end of the main oil passage is lower than 0 · 5 MPa.