A constant pressure control method and device for one-way gear pump outlet pressure
A technology of outlet pressure and constant pressure control, which is applied in the direction of pump control, pump, rotary piston type/oscillating piston type pump combination, etc., and can solve problems such as slow tracking speed
Active Publication Date: 2020-07-03
BEIJING MECHANICAL EQUIP INST
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[0003] In view of the above analysis, the present invention aims to provide a constant pressure control method and device for outlet pressure of a one-way gear pump to solve the problem of slow tracking speed in the closed-loop pressure control of the existing one-way gear pump
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[0048] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.
[0049] A specific embodiment of the present invention discloses a constant pressure control method for outlet pressure of a one-way gear pump. The flow chart is as follows figure 1 As shown, the steps are as follows:
[0050] Step S1: According to the given pressure at the outlet of the one-way gear pump (1) and the feedback pressure at the outlet of the one-way gear pump, the pressure tracking error e(k) is obtained:
[0051] e(k)=P g (k)-P f (k) (1)
[0052] Among them, k is the sampling number, P f (k) is the feedback pressure at the outlet of the one-way gear pump, collected by the pr...
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The invention relates to a method and device for constant pressure control of a unidirectional gear pump outlet pressure, and belongs to the technical field of constant pressure control. The problem that the tracking speed of a unidirectional gear pump is low when the pressure is controlled by a closed loop is solved. The control method includes the following steps that according to a setting pressure and a feedback pressure at an outlet of the unidirectional gear pump, a pressure tracking error is obtained; according to the pressure tracking error, a motor rotating speed setting is obtained;according to the motor speed setting, a motor rotating speed and a high-speed switching valve state instruction are obtained; rotation of the unidirectional gear pump is controlled according to the motor rotating speed; and according to the high-speed switching valve state instruction, opening and closing of a high-speed switching valve are controlled, and the unidirectional gear pump outlet pressure is adjusted. According to the method and device for constant pressure control of the unidirectional gear pump outlet pressure, fast tracking of the unidirectional gear pump outlet pressure is realized.
Description
technical field [0001] The invention relates to the technical field of constant pressure control, in particular to a constant pressure control method and device for outlet pressure of a one-way gear pump. Background technique [0002] When the one-way gear pump is working, the volume of the oil inlet chamber and the oil outlet chamber suddenly increases and decreases, and the sudden change of volume will cause the vibration of the oil circuit. Therefore, an unloading groove is generally designed in the gear pump to offset the vibration caused by the sudden change of volume. The unloading groove is set according to the oil inlet and outlet, and the position is asymmetrical; therefore, the gear pump can only be used in one direction. A one-way pump is a pump that can only flow in one direction, and the inlet and outlet are not variable. The problem with this is that the speed of the one-way pump is slower when it needs to depressurize. It is difficult to perform precise pre...
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IPC IPC(8): F04C14/00F04C14/24F04C14/28F04C11/00
CPCF04C11/00F04C14/00F04C14/24F04C14/28F04C2270/18
Inventor 吴庆勋杜晓东崔翔
Owner BEIJING MECHANICAL EQUIP INST