A constant pressure control device and a control method of a hydraulic pump
A technology of constant pressure control and hydraulic pumps, which is applied to fluid pressure actuation devices, fluid pressure actuation system components, mechanical equipment, etc. Change, improve the quality of power generation, and reduce the effect of damage
Active Publication Date: 2018-11-27
JIANGSU UNIV
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Problems solved by technology
[0004] In view of the deficiencies in the prior art, the present invention provides a hydraulic pump constant pressure control device and control method, which can effectively solve the problems of small displacement and low power generation efficiency of traditional hydraulic pumps at low speeds due to large internal leakage, and It can effectively suppress the pressure fluctuation caused by the change of wind speed, so that the hydraulic pump can output constant pressure, and improve the power generation quality of the wind power generation system
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
[0033] Such as figure 1 As shown, a hydraulic pump constant pressure control device according to the present invention includes a hydraulic pump (2), a detection unit (S1), a control unit (S2), a one-way valve (3), a two-position three-way electromagnetic reversing valve (4), two-position two-way electromagnetic reversing valve (5), high-pressure accumulator A (6), high-pressure accumulator B (7), hydraulic motor (14) and generator (1),
[0034] The hydraulic pump (2) mainly includes a driving mechanism (8), a medium-pressure accumulator (9), multiple sets of main hydraulic cylinders (13), multiple sets of auxiliary hydraulic cylinders (11), multiple three-position four-way electromagnetic reversing valves B (10) and three-position four-way electromagnetic reversing valv...
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The invention provides a constant pressure control device and a control method of a hydraulic pump, which mainly comprises a hydraulic pump, a detection unit, a control unit, a one-way valve, a two-position three-way electromagnetic reversing valve, a two-position two-way electromagnetic reversing valve, a high-pressure accumulator, a hydraulic motor and a generator. Hydraulic pump mainly includesdrive mechanism, double-acting hydraulic cylinder, three-position four-way electromagnetic reversing valve. The detection unit mainly collects the wind speed and the rotational speed of the hydraulicpump, and feeds back signals to the control unit. According to the collected rotational speed and the wind speed, the control unit adjusts the working positions of the three-position four-way electromagnetic reversing valve, the two-position two-way electromagnetic reversing valve and the two-position three-way electromagnetic reversing valve, so as to realize the constant pressure control of thehydraulic pump. The control method of the invention can effectively suppress the pressure fluctuation caused by the wind speed change, enable the hydraulic pump to maintain the constant pressure output under different working conditions, and improve the power generation quality of the wind power generation system.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic pump constant pressure control device and a control method. Background technique [0002] The hydraulic pump is the power component of the hydraulic wind power generation system, and its output characteristics directly affect the power generation quality and efficiency of the wind power generation system. In the hydraulic wind power generation system, the transmission shaft of the wind turbine is directly connected to the hydraulic pump. Under different working conditions, the displacement of the traditional large-displacement plunger pump cannot be adjusted, resulting in the change of the output pressure with the change of the wind speed, which reduces the hydraulic system. transfer efficiency. In order to reduce the output pressure fluctuation of the hydraulic pump and improve the quality of power generation, it is necessary to use a constant pressure con...
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IPC IPC(8): F15B1/02F15B21/08
CPCF15B1/02F15B21/087
Inventor 谢方伟柯俊戴开宇王存堂赵呈向孙俊雨张兵
Owner JIANGSU UNIV