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我们在工矿型内燃机车设计中,采用了《内燃机车》1987年第12期发表的“NTP_5型空压机机组在东风_4型机车上的试验”一文中关于空压机控制电路的改进方案。该控制电路针对空压机有载起动时,起动电流超过了该电机瞬时过载电流允许值的问题,应用了较为成熟的东方红型及北京型液力传动内燃机车空压机机组无负荷起动电空阀。此阀安装在空压机及止回阀之间的总风管上,当风压低于0.735MPa空压机起动时,电空阀有电,使总风管直通大气,则空压机可在无背压工况下起动,从而减小了空压机起动转矩,使电动机起动电流大大减少。这就防止了降压起动电阻、接触器触头、电动机等各有关器件的烧损。但通过调查,该控制电路并非能实现完全无背压起
We in the design of industrial and mining diesel locomotive, the use of the “diesel locomotive” No. 12 of 1987 published “NTP_5 air compressor unit in the Dongfeng _4 locomotive test,” an article on the air compressor control circuit improvements . The control circuit for air compressor start-up load, the starting current exceeds the allowable value of the instantaneous overload current of the motor, the application of the more mature Dongfanghong and Beijing hydraulic transmission diesel locomotive air compressor unit no-load start-up Empty valve. This valve is installed in the air duct between the compressor and the check valve. When the air pressure is lower than 0.735MPa and the air compressor is started, the electropneumatic valve is electrified and the air duct is opened to the atmosphere. Start without back pressure conditions, thus reducing the compressor starting torque, the motor starting current is greatly reduced. This prevents the buck start-up resistors, contactor contacts, motors and other related devices burn. However, through the investigation, the control circuit is not able to achieve completely no back pressure