Double-pump flow dividing and combining control system and control method thereof

A technology of a control system and a control method, which is applied in the field of dual-pump hydraulics, can solve problems such as the speed change of the actuator, and achieve the effect of improving smoothness and realizing high-speed operation.

Active Publication Date: 2020-12-25
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this control scheme will have a large change in the speed of the actuator during the switching process of the compound action

Method used

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  • Double-pump flow dividing and combining control system and control method thereof
  • Double-pump flow dividing and combining control system and control method thereof
  • Double-pump flow dividing and combining control system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 As shown, a dual-pump diversion and confluence control system includes a confluence valve 1, an electromagnetic reversing valve 2, a first actuator control valve 31, a second actuator control valve 32, a first actuator 41, and a second actuator 42. .

[0037]In this scheme, the first oil inlet P1 is connected to the outlet of the first hydraulic pump, the first feedback oil path LS1 is connected to the load feedback port of the first hydraulic pump, the second oil inlet P2 is connected to the outlet of the second hydraulic pump, and the second feedback oil path LS1 is connected to the load feedback port of the first hydraulic pump. The oil passage LS2 is connected to the load feedback port of the second hydraulic pump. The confluence valve 1 has 2 working positions (the lower position is the through position, and the upper position is the cut-off position), 1 control oil port, and more than 2 working oil ports. Road P1, the second oil inlet road P2, the ...

Embodiment 2

[0041] like figure 2 As shown, a dual-pump diversion and confluence control system includes a confluence valve 1, an electromagnetic reversing valve 2, a first actuator control valve 31, a second actuator control valve 32, a third actuator control valve 33, and a fourth actuator control valve. The mechanism controls the valve 34 , the first actuator 41 , the second actuator 42 , the third actuator 43 , and the fourth actuator 44 .

[0042] Operating any one of the second actuator 42 , the third actuator 43 , and the fourth actuator 44 alone can realize dual pumps to supply oil at the same time, which improves the operating efficiency of the actuator.

[0043] The electromagnetic reversing valve 2 can be controlled by a button on the joystick that can be automatically reset. When the first actuator 41 needs to reach the maximum speed of the double pump oil supply, it is only necessary to press and hold the control button to make the electromagnetic reversing valve 2 Power on,...

Embodiment 3

[0045] like image 3 As shown, on the basis of Embodiment 1, a hydraulic control reversing valve 5 is added, and the feedback pressure of the control valve of the first actuator 41 is used as the control pressure of the hydraulic control reversing valve 5, and the hydraulic control reversing valve 5 The second oil inlet port 6 is connected to a stable pilot oil source.

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Abstract

The invention discloses a double-pump flow dividing and combining control system. The double-pump flow dividing and combining control system comprises a first hydraulic pump, a second hydraulic pump,a flow combining valve, an electromagnetic reversing valve, a first executing mechanism control valve, a second executing mechanism control valve, a first executing mechanism and a second executing mechanism. Meanwhile, the invention further discloses a control method of the double-pump flow dividing and combining control system. The problem that the operation speed of an amplitude changing mechanism is greatly changed in a composite action switching process is solved, and the smoothness of composite actions is improved on the premise that the operation efficiency of common actions in a double-pump hydraulic system is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of dual-pump hydraulics, and in particular relates to a dual-pump separation and confluence control system and a control method thereof. Background technique [0002] With the development of construction machinery, people put forward higher requirements for the operability and speed of the crane. In modern hoisting machinery, in order to improve the compound action effect of the crane, the flow independent distribution (LUDV) control method has been continuously applied to the development of the hydraulic system of the crane. When the load pressure difference is large, the shunt accuracy cannot be guaranteed, resulting in a decrease in the effect of the compound action. [0003] In order to further improve the control accuracy of the compound action, a double-pump hydraulic system is proposed, which cooperates with the dual-pump control scheme of the multi-way valve on the car, which greatly improves the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/17F15B13/06B66C13/18
CPCF15B11/17F15B13/06B66C13/18F15B2211/20576
Inventor 曹立峰焦国旺周彬朱双双
Owner XUZHOU HEAVY MASCH CO LTD
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