The invention discloses an
aviation ground support equipment hydraulic
system step pressure relief device,
system and method, which comprises a pressure
transmitter, pressure relief stop valve groups and an overflow valve, an integrated mounting block is of a rectangular structure, the pressure
transmitter is arranged on one side of the integrated mounting block, the pressure relief stop valve groups are arranged at the upper end and the lower end of the integrated mounting block, and the overflow valve is arranged on the integrated mounting block. The overflow valve is arranged on the adjacent side of the pressure
transmitter, the integrated mounting block is provided with an
oil supply port and an oil return port, the
oil supply port and the pressure transmitter are arranged on the same side, and the oil return port is arranged on the opposite side of the
oil supply port; according to the stepped pressure relief method, a medium flowing channel is formed in an integrated mounting block, a pressure transmitter, a pressure relief stop valve set and an overflow valve are communicated through the integrated mounting block, the
system pressure is quickly relieved to zero step by step in a two-stage pressure relief mode during pressure relief, the pressure relief time is short, and on the premise that the pressure relief time is not obviously prolonged, the pressure relief efficiency is greatly improved. And the pressure of the hydraulic system is quickly and safely released to zero, so that the influence on the
safe operation of the aircraft hydraulic system is prevented.