Control method of opening of large flow throttle valve for water

A control method and throttle valve technology, applied in the direction of feedback control, controllers with specific characteristics, electric controllers, etc., can solve the problems of valve stem displacement drift, compressor needs to be improved, and control accuracy is not high, etc. To achieve the effect of uniform flow change and good micro-adjustment performance
CN101634862AActive Publication Date: 2010-01-27CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2010-01-27

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Abstract

The invention provides a control method of the opening of a large flow throttle valve for water. The control method is characterized in that the position of a piston rod in a proportional servo oil cylinder is controlled by regulating input current of a pilot electro-hydraulic proportional flow valve, and the piston rod drives a valve core of the large flow throttle valve for water to move, thus ultimately controlling the opening of the large flow throttle valve for water; the piston rod is fixedly connected with the valve core of the throttle valve for water by screw threads; an unsymmetrical closed loop PID control method is employed in the control process, input is a given opening value of the large flow throttle valve for water, feedback is the actually detected opening value of the large flow throttle valve for water, the difference e (t) between the given opening value of the large flow throttle valve for water and the actually detected opening value of the large flow throttle valve for water is input into a PID controller, and the PID controller outputs current signals to the pilot electro-hydraulic proportional flow valve. The method has the advantages of high control precision, convenient installation and operation, strong practicability and high reliability.
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Description

technical field

[0001] The invention belongs to the field of electromechanical-hydraulic integrated control, specifically a method for controlling the opening degree of a large-flow water throttle valve, which is applied to an oil pressure control system mainly based on an electro-hydraulic proportional reversing valve to accurately control large-flow water. The position of the spool of the valve can be controlled to control the excess flow of the large flow water valve. Background technique

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Claims

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