Hydraulic control system for differential oil compensation with electric-hydraulic proportional cartridge valves

Abstract

The invention relates to a hydraulic control system for differential oil compensation with electric-hydraulic proportional cartridge valves, and in particular to hydraulic control system equipment with electric-hydraulic proportional control and differential speed regulation. According to the hydraulic control system, the control port of a first cartridge valve is communicated with the working port of a three-position four-way electromagnetic directional valve; the oil inlet of a second cartridge valve is communicated with a rod cavity of an oil cylinder, and the control port of the second cartridge valve is communicated with the working port of the three-position four-way electromagnetic directional valve; the control port of a sequence valve is communicated with a plug cavity of the oil cylinder; the oil outlet of a fourth cartridge valve is communicated with the plug cavity of the oil cylinder; the oil inlet of a third cartridge valve is communicated with the plug cavity of the oil cylinder; the oil inlet of a first electromagnetic stop valve is communicated with the control port of the third cartridge valve; the oil inlet of a second electromagnetic stop valve is communicated with the plug cavity of the oil cylinder. The hydraulic control system has the effects of being simple in structure, small in size by adopting the cartridge valves, stable and reliable in working, high in working efficiency, capable of saving energy consumption, high in integration level, and widely applied to equipment with the hydraulic control system for differential oil compensation with the electric-hydraulic proportional cartridge valves.

Description

technical field [0001] The invention relates to an electro-hydraulic proportional cartridge valve differential supplement oil hydraulic control system, in particular to a hydraulic control system equipment for electro-hydraulic proportional control and differential speed adjustment. Background technique [0002] At present, the slide valve type hydraulic control system equipment developed in the 1950s is mainly used in the hydraulic mechanical system, especially the speed control structure of the hydraulic actuator is complicated, and more valves are needed to realize the speed adjustment control of the actuator, but only manual control , can not be connected with the existing computer control, and the control precision is low, the working efficiency of hydraulic machinery is low, and it cannot meet the needs of existing operations. Its defects are complex structure, high failure rate, serious leakage, unstable action, large impact, and occupation Large space, inconvenient m...

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Problems solved by technology

[0003] The object of the present invention is to provide an electro-hydraulic proportional cartridge valve differential charge hydraulic control system, which combines the proportional cartridge valve with the integrated hydraulic control system to control the fast forward, work forward, Return to the process to solve the problems of low precision of hydraulic machinery, complex structure, high failure rate, serious leakage, unstable movement, large impact, large space occupation, and inconvenient maintenance. The hydraulic signal is connected with the computer to realize the rapid hydraulic control. The purpose of the process of entering, working and returning

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