Undercarriage rising and landing control hydraulic device for helicopter
A hydraulic device and landing gear technology, which is applied in fluid pressure actuation devices, mechanical equipment, fluid pressure actuation system components, etc., can solve the problems of high transmission medium requirements, affecting the life of hydraulic pumps, system temperature rise, etc., to achieve convenient Integrated design, easy failure and simple maintenance
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[0032] A hydraulic device for retracting and retracting the landing gear of a helicopter is provided. The device includes a frequency conversion motor 1, a bidirectional quantitative hydraulic pump 2, a first hydraulic control check valve 3, a first overflow valve 4, a second hydraulic control check valve 5, and a second hydraulic control check valve. Three hydraulic control check valves 6, second overflow valve 7, fourth hydraulic control check valve 8, fuel tank 9, landing gear retractable cylinder 10;
[0033] Among them, the two-way quantitative hydraulic pump 2 has oil port A and oil port B, and the drive shaft of the two-way quantitative hydraulic pump 2 is connected to the output shaft of the frequency conversion motor. Oil enters oil from port A and oil exits oil port A. When the frequency conversion motor reverses, the working state of the two-way quantitative hydraulic pump 2 is that oil enters oil port A and oil exits oil port B;
[0034] The four hydraulic control ...
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