Intelligent calibration device and method for steady-state fluid force of valve element of proportional valve

Abstract

The invention relates to a proportional valve, in particular to an intelligent calibration device and method for a steady-state fluid force of a valve element of a proportional valve. The proportionalvalve with a valve controller is mounted in a mounting table of a pressure adjustable hydraulic system valve; a circuit board for calibration is connected to the valve controller, and a D / A module onthe circuit board sends out a position command to the valve controller, so that the circuit board is controlled in a target position, and the A / D module receives a valve element position fed back bythe valve controller and a current signal of the proportional valve; the circuit board is programmed by using a singlechip microcomputer or other microprocessors, a signal collected by a program is processed to obtain a fluid force of a measuring point and a position command signal of a next measuring point is sent out till the fluid forces of all measuring points are measured, and at the moment,the circuit board for calibration sends measured data to a computer by way of serial communication or bus communication. According to the intelligent calibration device and method, the amplitude of the fluid force can be calibrated automatically without detaching a 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.

Images