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Hydraulic oil distribution controlling device for crane hydraulic system

The invention relates to a hydraulic oil distributing and controlling device of a crane hydraulic system, which consists of a first oil inlet and a second oil inlet which are used for communicating with at least two duplex pumps, a first oil outlet and a second oil outlet which are used for supplying oil for a main hoisting motor and an auxiliary hoisting motor as well as a third oil outlet and a fourth oil outlet which are used for supplying oil for a derricking cylinder and a telescopic cylinder; the first oil inlet and the second oil inlet are communicated with the four oil outlets through an oil circuit; control valves are arranged at least on the communicating oil circuits of the first oil inlet and the second oil outlet as well as the third oil outlet and the fourth oil outlet; the control valves are arranged at least on the communicating oil circuits of the second oil inlet and the first oil outlet as well as the second oil outlet and the third oil outlet. The hydraulic oil distributing and controlling device can realize interfluent oil supply of the two duplex pumps so as to improve the operation speed of the corresponding operating condition and operation efficiency, and can use any duplex pump to supply oil respectively to realize a flexible and convenient flow distribution proposal combined by diversified operating conditions.
Owner:SANY AUTOMOBILE HOISTING MACHINERY
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