The invention discloses a multi-purpose crane hydraulic system. A power source is mounted at the bottom of a rack body; the inlet of the power source is connected with an oil tank; the outlet of the power source is connected with the inlet of a pressure flow control valve group; the oil tank and the pressure flow control valve group are mounted in the middle of the rack body; the outlet of the pressure flow control valve group is connected with the inlet of an execution mechanism control valve group; the execution mechanism control valve group is mounted at the upper part of the rack body; outlets of the execution mechanism control valve group are connected with corresponding execution mechanisms; a breathing system is mounted on one side of the rack body; the outlet of the breathing system is connected with the oil tank. Due to the adoption of the breathing system, the dust pollution problem is solved, the system is not heated due to the adoption of a proportional pressure valve and a proportional flow valve, and the energy can be saved; as only one proportional pressure valve and one proportional flow valve are adopted to replace a plurality of pressure valves and flow valves, the system is greatly simplified, the size is also greatly reduced, and the problem of space for high-altitude operation is solved.
Multi-purpose crane hydraulic system
2015-05-13
Patent
Electronic Resource
English