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Hydraulic system capable of achieving constant pressure control and load sensitive control and control method

A load-sensitive control and hydraulic system technology, applied in the field of hydraulic systems, can solve the problems of additional auxiliary pumps, etc., and achieve the effects of reduced energy consumption, reliable operation, and long service life

Pending Publication Date: 2021-08-06
SHENGBANG GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing suspension control system in the background technology needs to add additional auxiliary pumps and hydraulic control oil circuits, the present invention provides a hydraulic system and control method that can realize constant pressure control and load sensitive control

Method used

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  • Hydraulic system capable of achieving constant pressure control and load sensitive control and control method
  • Hydraulic system capable of achieving constant pressure control and load sensitive control and control method
  • Hydraulic system capable of achieving constant pressure control and load sensitive control and control method

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Embodiment Construction

[0023] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0024] Depend on figure 1 combine Figure 2-3 As shown, a hydraulic system capable of realizing constant pressure control and load-sensing control includes a load-sensing variable pump 1, a multi-way valve 2, a reversing valve 3, a first feedback oil circuit 41 and a suspension module 5. The multiple The road valve includes a control module 21, a second feedback oil circuit 42, a shuttle valve 22 and at least one working module 7, and the load sensitive variable pump includes a variable pump 11, a control valve 12, a cut-off valve 13 and a control cylinder 14. The control cylinder includes a piston rod 141, a rod chamber 142 and a rodless chamber 143. The variable pump is connected to the first oil circuit 61 and the second oil circuit 62 respectively, and the first oil circuit is respectively connected to the control valve. cavity, the cut-off valve contr...

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Abstract

The invention discloses a hydraulic system capable of achieving constant pressure control and load sensitive control and a control method. The invention solves the problem that an auxiliary pump and a hydraulic control oil way need to be additionally arranged in an existing suspension control system. The system comprises a load-sensitive variable pump, a multi-way valve, a reversing valve, a first feedback oil way and a suspension module, the multi-way valve comprises a control module, a second feedback oil way, a shuttle valve and at least one working module, the load-sensitive variable pump comprises a variable pump, a control valve, a stop valve and a control oil cylinder, the control oil cylinder comprises a piston rod, a rod cavity and a rodless cavity, the shuttle valve selects pressure oil of the first feedback oil way or the second feedback oil way and inputs the pressure oil into a control valve spring cavity, and the pressure oil of the first oil way enters the rodless cavity by overcoming the pressure of a stop valve spring cavity and interacts with the pressure oil in the rod cavity to enable the piston rod to move. The system also has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system and a control method capable of realizing constant pressure control and load sensitive control. Background technique [0002] The active suspension system of engineering vehicles generally adopts electro-hydraulic control hydraulic suspension. The hydraulic suspension system can automatically adjust the expansion and contraction of the suspension hydraulic cylinder according to the road conditions. It is necessary to respond quickly to the expansion or contraction of the suspension hydraulic cylinder. The power source of the hydraulic cylinder comes from the pump. To make the cylinder perform actions quickly, the pump needs to respond quickly. The suspension control of existing engineering vehicles is mostly controlled by adding an independent auxiliary gear pump, and the auxiliary gear pump that independently controls the suspension must always be in working condition to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/04B60G17/056B60G17/0195
CPCB60G17/0195B60G17/0408B60G17/0416B60G17/056
Inventor 姜伟姜洪王震山张晓磊李贺祝天昊皇甫大旭
Owner SHENGBANG GRP
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