Device capable of simultaneously measuring motion acceleration of valve disc of reciprocating and impact force of pump valve

Abstract

The invention provides a device capable of simultaneously measuring the motion acceleration of a valve disc of a reciprocating pump and the impact force of a pump valve. The device is mainly used for simultaneously measuring signals of the motion acceleration and the impact force by a waterproof compression type impedance head sensor 12 arranged on the valve disc when the valve disc of the pump valve collides with a valve seat; a valve cover 9 is provided with two signal wire sealing devices which are the same in structure, each signal wire sealing device comprises a stud 6, a nut 7, an internal thermoplastic polyurethane elastomer (TPE) 13 and an O-shaped sealing ring 14; the two signal wire sealing devices are used for leading an acceleration output signal wire 5 and a force output signal wire 11 of the impedance head sensor out of an inner cavity of a valve cylinder 10, thus guaranteeing that the pump valve does not leak; after being led out, the signal wires are connected with a charge amplifier 15; after being amplified by the charge amplifier, the signals are input into a data acquisition box 16 and then are transmitted into a computer and a pump valve impact characteristic parameter test and analysis system 17 by a universal serial bus (USB) interface of the data acquisition box; therefore, the real impact motion law of the pump valve of the reciprocating pump can be obtained, and an important scientific basis and an experimental verification method are provided for perfecting the design theory of the pump valve.

Description

technical field [0001] The invention is a device for simultaneously measuring the motion acceleration of the valve disc of a reciprocating pump and the impact force of the pump valve (including the valve disc and valve seat), thereby simultaneously measuring the motion acceleration of the valve disc and the impact force of the pump valve when the valve disc hits the valve seat. The impact force brought by it can provide a basis for studying the theory of no impact of pump valves, material selection and structural design of pump valves, and is of great significance for determining the maximum allowable stroke times and pump pressure and other working parameters of reciprocating pumps. The device is equipped with a customized waterproof and pressure-resistant piezoelectric crystal impedance head sensor (integrated with a force sensor and an acceleration sensor, installed on the measured valve disc, and can simultaneously measure the motion acceleration of the valve disc and the c...

AI Technical Summary

Problems solved by technology

Some scholars have tried such a method, and proposed to use the strain gauge test technology on the valve seat to measure the stress generated by the impact of the valve seat. The object of action is the ribbed valve seat. The hole valve seat is not applicable, and this method cannot study the impact force on the valve disc

Since the valve disc works in the liquid in the pump cylinder with pressure, so far, no one has proposed a more effective and widely applicable method for measuring the impact force of the pump valve, nor has there been a method that can simultaneously measure the motion acceleration and Device for pump valve impact force

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