Intelligent Calibration Device and Method for Steady-state Hydraulic Power of Proportional Valve Spool

Abstract

The present invention relates to proportional valves. The intelligent calibration device and method of the steady-state hydraulic power of the proportional valve spool of the present invention is to install the proportional valve with the valve controller on the installation table of the adjustable pressure hydraulic system valve; the calibration circuit board is connected with the valve controller , the D / A module on the circuit board sends a position command to the valve controller to make it control at the target position, and receives the valve core position and the current signal of the proportional valve through the A / D module; the circuit board adopts a single-chip microcomputer or other The microprocessor is programmed, and the program processes the collected signals to obtain the hydraulic force of the measuring point, and sends out the position command signal of the next measuring point until the hydraulic force of all measuring points is measured, at this time, the calibration circuit board communicates through the serial port Or bus communication and other methods to send the measured data to the computer. The solution of the invention can automatically calibrate the size of the hydraulic power without dismantling the proportional valve body.

Description

technical field [0001] The invention relates to a proportional valve, in particular to the calibration of the steady-state hydraulic power of a valve core of the proportional valve. Background technique [0002] Hydraulic power: The proportional valve controls the opening of the valve port through the movement of the spool. When the continuously flowing oil passes through the valve port, the direction and speed change, and the oil will form a hydraulic force on the valve core, prompting the valve port to close. The opening of the valve port of the proportional valve is controlled by the position of the spool, and the movement direction of the spool is mainly affected by three forces, which are the push or pull force of the electromagnet, the force of the bias spring and the hydraulic force. When the spool stabilizes at a certain position and keeps the opening of the valve port unchanged, it is in a state of force balance. The push or pull force of the electromagnet can be o...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing force measurement technologies are in direct contact with the measured object, but they are helpless for the experimental measurement of the hydraulic power of the spool. We cannot disassemble the proportional valve structure for measurement, let alone change the valve body structure for measurement.

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