A dual-pump split-confluence control system and its control method

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: 2022-08-02
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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  • A dual-pump split-confluence control system and its control method
  • A dual-pump split-confluence control system and its control method
  • A dual-pump split-confluence control system and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 As shown, a dual-pump sub-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 solution, the first oil inlet path 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 path 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 pass-through position, and the upper position is the cut-off position), 1 control oil port, and more than 2 working oil ports. There are 4 oil ports in the embodime...

Embodiment 2

[0041] like figure 2 As shown, a dual-pump split-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 33. The mechanism control valve 34 , the first actuator 41 , the second actuator 42 , the third actuator 43 , and the fourth actuator 44 .

[0042] By operating any one of the second actuator 42 , the third actuator 43 and the fourth actuator 44 alone, the dual pumps can simultaneously supply oil, which improves the operating efficiency of the actuator.

[0043] The electromagnetic reversing valve 2 can be controlled by an automatically resettable button on the joystick whether it is energized or not. When the first actuator 41 needs to reach the maximum speed of the dual-pump oil supply, it is only necessary to press and hold the control button to make the electromagnetic reversing valve 2 Whe...

Embodiment 3

[0045] like image 3 As shown, on the basis of Embodiment 1, a hydraulically controlled 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 hydraulically controlled reversing valve 5, and the The second oil inlet port 6 is connected to a stable pilot oil source.

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PUM

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Abstract

The invention discloses a dual-pump split-confluence control system, comprising a first hydraulic pump, a second hydraulic pump, a confluence valve, an electromagnetic reversing valve, a first actuator control valve, a second actuator control valve, and a first actuator The invention also discloses its control method; it solves the problem that the operating speed of the luffing mechanism changes greatly during the switching process of the compound action, and improves the smoothness of the compound action under the premise of ensuring the working efficiency of the common actions in the dual-pump hydraulic system. sex.

Description

technical field [0001] The invention belongs to the technical field of dual-pump hydraulics, and in particular relates to a dual-pump split-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 rapidity of cranes. 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 compound action. [0003] In order to further improve the control accuracy during compound action, a dual-pump hydraulic system is proposed, and the dual-pump control scheme of the multi-way valve on the truck is used to greatly improve the compound action effect of the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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