Independent control electrohydraulic system of oil inlet and outlet with pump valve composite flux matched

Abstract

The invention discloses an electro-hydraulic system with matched pump-valve compound flow and independent controlling at oil inlet / outlet, which is characterized in that the output flow of the hydraulic supply is continuously adjusted under control of electronic signals, the flow-matching controller is arranged between a pressure sensor and the oil pipe of the hydraulic supply; an independent oil inlet and outlet controlling valve set comprises two pressure sensor I, II, two 2-position 2-way proportion throttle valve I, II, and two 2-position 2-way electromagnetic directional valve I, II. The invention allows the output flow from the power supply to be always matched with the flow desired by all actuators, so that the oil-intake valve controlling the max. load actuator is fully open, this not only allows each actuator be controlled by the oil inlet and outlet independently, but also can minimize the loss of the system. The innovation in the invention also includes that the flow of the inlet and outlet are detected respectively depending upon the moving direction of the load, flow matching is realized for the system, moving steadiness of the actuators in each direction is guaranteed, and condition for automatic control for industrial control technology especially equipment manufacturing is provided.

Description

technical field [0001] The invention relates to an electro-hydraulic control system in which the compound flow rate of a pump valve is matched with the inlet and outlet ports, in particular, it is an electro-hydraulic control system for a pump valve electro-hydraulic control system that controls multiple actuators individually or simultaneously and has a relatively small throttling The lost pump valve composite flow matches the inlet and outlet ports to independently control the electro-hydraulic system. Background technique [0002] Hydraulic actuators include hydraulic cylinders and hydraulic motors, which have two controlled chambers and oil ports for oil inlet and outlet. The traditional four-side valve port linkage control method is adopted, and the pressure of only one chamber can be controlled at a certain time. or traffic. In the electro-hydraulic system using cartridge valves, four two-way cartridge valves are used to control the oil inlet and outlet of the actuato...

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Problems solved by technology

[0007] The present invention is an electro-hydraulic system for independent control of pump valve compound flow matching inlet and outlet ports, and provides a single actuator or multi-actuator, the movement parameters of the two chambers of the hydraulic cylinder are independently controllable, and the throttling loss of the system is reduced. The minimum composite flow rate of the pump and valve matches the system hardware structure of the electro-hydraulic system with independent control of the oil inlet and outlet, in order to solve the low energy efficiency of the four-side valve linkage control system in the prior art, the control performance is not easy to guarantee, and the independent control technology of the oil inlet and outlet Problems that can only be applied to a single executor

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