Title:
HYDRAULIC CONTROL VALVE GROUP, HYDRAULIC SYSTEM, AND OPERATION MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/070969
Kind Code:
A1
Abstract:
A hydraulic control valve group, a hydraulic system, and an operation machine. The hydraulic control valve group comprises a proportional valve (1) and a pressure regulating valve (2), wherein the pressure regulating valve (2) comprises an oil inlet connected to a main oil circuit of a main valve, an oil outlet for returning oil, and a remote pressure regulating port connected to an oil outlet of the proportional valve (1); a corresponding control flow is output from the oil outlet of the proportional valve (1) according to the pressure of the main oil circuit of the main valve; and the pressure regulating valve (2) adjusts the opening degree of a valve port thereof according to the control flow that is output by the proportional valve (1). A safe pressure value is preset for the pressure regulating valve, and during operation, the control flow at the oil outlet of the proportional valve is controlled according to the pressure of the main oil circuit of the main valve, and is transmitted to the remote pressure regulating port. A real-time pilot control pressure required by the pressure regulating valve is then calculated according to the control flow, and the opening degree of the valve port of the pressure regulating valve is adjusted, such that the control pressure of the pressure regulating valve is proportionally reduced, and a pressure peak value of a system is reduced during reversing, thereby reducing the system impact, and alleviating the shaking caused by the impact without losing the pumping efficiency and pumping continuity.
More Like This:
| JPS52114121 | DAMPING DEVICE FOR SPOOL VALVE |
| WO/1997/037137 | HYDRAULIC CONTROL VALVE |
| WO/2013/087156 | PRESSURE LIMITING VALVE AND CLOSED HYDRAULIC CIRCUIT HAVING A PRESSURE LIMITING VALVE |
Inventors:
LI JUN (CN)
YANG MIN (CN)
HU TAO (CN)
YANG MIN (CN)
HU TAO (CN)
Application Number:
PCT/CN2022/073535
Publication Date:
May 04, 2023
Filing Date:
January 24, 2022
Export Citation:
Assignee:
SANY AUTOMOBILE MFG CO LTD (CN)
International Classes:
F15B13/02; F15B13/044; F15B20/00; F15B21/00
Foreign References:
| CN216430099U | 2022-05-03 | |||
| CN113898633A | 2022-01-07 | |||
| CN103603840A | 2014-02-26 | |||
| CN204677522U | 2015-09-30 | |||
| JP2000045340A | 2000-02-15 |
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
Download PDF: