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

A flow matching, oil inlet and outlet technology, applied in the direction of fluid pressure actuators, servo motors, servo motor components, etc., can solve the problems of difficult to guarantee control performance, applicable to a single actuator, low energy efficiency, etc., to reduce energy Low consumption, low throttling loss, and the effect of flow matching

Active Publication Date: 2008-01-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 m

Method used

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

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Embodiment 1

[0026] In Fig. 1, the electro-hydraulic system implementing the compound flow matching of the pump and valve of the present invention to independently control the inlet and outlet ports includes a hydraulic actuator 1, a safety valve 2, a hydraulic power source 3, a flow matching controller 4, and an independent control valve group for the inlet and outlet ports 5. Its pump valve electro-hydraulic system is composed of hydraulic power source 3. The output flow rate can be continuously adjusted by electronic signal control. A flow matching controller 4 is added. The oil inlet and outlet independent control valve group 5 is composed of pressure sensor I6, pressure sensor II7, 2-position 2-way proportional throttle valve I8, 2-position 2-way proportional throttle valve II9, 2-position 2-way electromagnetic directional valve I10 and 2-position 2-way electromagnetic directional valve II11.

[0027] Among them: the inlet of the two-position two-way proportional throttle valve I8 pass...

Embodiment 2

[0029] In Fig. 2, the electro-hydraulic system implementing the compound flow matching of the pump and valve of the present invention to independently control the inlet and outlet ports includes a hydraulic actuator 1, a safety valve 2, a hydraulic power source 3, a flow matching controller 4, and an independent control valve group 5 for the inlet and outlet ports , the electro-hydraulic system of the pump valve is composed of the output flow of the hydraulic power source 3 can be continuously adjusted by electronic signal control, a flow matching controller 4 is added, and the independent control valve group 5 of the oil inlet and outlet is composed of a pressure sensor I6, a pressure sensor II7, two One-position two-way proportional throttle valve I8, two-position two-way proportional throttle valve II9, two-position two-way electromagnetic directional valve I10 and two-position two-way electromagnetic directional valve II11.

[0030] Among them, the oil inlet and outlet inde...

Embodiment 3

[0032] In Fig. 3, according to the method of embodiment 2, the oil inlet and outlet independent control valve group 5 is composed of a pressure sensor III12, a three-position four-way reversing valve 13, a two-position two-way proportional throttle valve III14, and a three-position four-way The oil inlet of the reversing valve 13 is connected to the outlet P of the hydraulic power source 3 through the oil pipe L1, and the oil outlet A is connected to the oil port P of the hydraulic actuator 1 through the oil pipe L2 A , the oil outlet B is connected to the oil port P of the hydraulic actuator 1 through the oil pipe L3 B , the oil return port t is connected to the outlet of the two-position two-way proportional throttle valve through the oil pipe L4 to communicate with the fuel tank T, the pressure sensor III12 is installed on the oil pipe L4, and its output signal is connected to the flow matching controller 4 through wires;

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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...

Claims

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Application Information

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IPC IPC(8): F15B13/044F15B11/08
Inventor 权龙冯克温陈青
Owner TAIYUAN UNIV OF TECH
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