Pump control system main valve hysteresis compensation method and device

A technology of compensation device and compensation method, which is applied in the direction of fluid pressure actuation device, transportation and packaging, load suspension components, etc., which can solve the problems of ineffectiveness, weakening of the secondary adjustment effect of the valve on the pump, etc., and prevent the compensation from being over-compensated. When the effect

Active Publication Date: 2019-12-03
XUZHOU HEAVY MASCH CO LTD
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AI Technical Summary

Problems solved by technology

Although this kind of scheme can allow the valve to adjust the flow of the pump twice, but when the handle increases and then gradually decreases, due to the existence of the main valve hysteresis, in this case, the valve has a secondary adjustment to the pump flow. sub-regulatory effect will be greatly weakened, or even no effect

Method used

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  • Pump control system main valve hysteresis compensation method and device

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0041] The relevant description of the pump control system in the prior art is as follows:

[0042] The main valve is an electronically controlled main valve, increasing its control current can increase the opening of the main valve, reducing its control current can reduce the opening of the main valve;

[0043] The pump is an electronically controlled main pump, increasing its control current can increase the displacement of the pump, and reducing its control current can reduce the displacement of the pump;

[0044] This technical solution is mainly used for cranes with electronic control mode, that is, by pushing the handles corresponding to the action (there is a handle on the left and right...

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Abstract

The invention discloses a pump control system main valve hysteresis compensation method and device, and the method comprises the following steps of collecting the valve front pressure P1 and the valverear pressure P2 of a main valve, and calculating to obtain a pressure difference P3 = P1-P2; comparing the pressure difference P3 with the preset pressure preset values K1 and K2, wherein K2 is greater than K1; A) not carrying out the hysteresis compensation when K1 <=P3<=K2; B) carrying out the hysteresis compensation when P3<K1, and stopping the hysteresis compensation until P3>K1; C) when P3>K2, considering that the hysteresis compensation is excessive, and correcting the compensation. The method of the present invention can compensate the hysteresis of the main valve, and prevents the excessive compensation.

Description

technical field [0001] The invention relates to the technical field of crane pump control system design, in particular to a hysteresis compensation method and device for a main valve of a pump control system. Background technique [0002] Explanation of related terms: [0003] Main valve hysteresis: When the main valve changes direction, as the inclination angle of the handle gradually increases, the opening of the main valve also gradually increases. When the inclination angle of the handle gradually increases to the maximum value and then decreases to the minimum value, for the same handle , there is a difference in the opening of the main valve, and the difference is a hysteresis. [0004] Cranes are important equipment widely used in engineering construction. They mainly include basic actions such as lifting, telescopic, luffing, and slewing, all of which are driven by a hydraulic system. In the vertical lifting condition of heavy objects, when lifting, the oil output ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/20F15B13/02
CPCB66C13/20F15B13/026
Inventor 曹立峰焦国旺李超杜建西朱双双
Owner XUZHOU HEAVY MASCH CO LTD
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