Valve spool displacement measuring test bed

Abstract

The invention provides a valve spool displacement measuring test bed which comprises a linear guide rail, a valve seat, a first sliding portion, a second sliding portion, a third sliding portion, a flange, an electromagnet coil, a sealing bin, a support, a transition ring, a laser displacement sensor and a mounting seat. The valve seat is mounted on the first sliding portion, the sealing bin is arranged on the support, the mounting seat is arranged on the third sliding portion, the laser displacement sensor is arranged on the mounting seat, a first end of a measuring rod can penetrate a sealing cover and a through hole and is fixedly connected with a connecting hole, so that the first end of the measuring rod is fixedly connected with a moving iron of a switching valve, the transition ring is welded with a plunger tube of the switching valve and the sealing cover, a transparent plate fixes a sealing ring into a groove of the sealing cover through a pressing plate and a bolt, a second end of the measuring rod is sealed in high-pressure oil, the laser displacement sensor can irradiate the second end of the measuring rod through the transparent plate and then reflect laser to a receiving port of the laser displacement sensor, and displacement of the measuring rod is calculated by the aid of optical reflection theory, namely, displacement of a valve spool is calculated.

Description

technical field [0001] The invention relates to the technical field of a switching valve spool measuring mechanism, in particular to a spool displacement measuring test bench. Background technique [0002] At present, in daily life, people often use displacement sensors to measure the tiny displacement of objects, and displacement sensors are divided into contact type and non-contact type. One end of the contact sensor is fixed, and the other end is connected to the measured object, so that the displacement of the measured object can be measured. The non-contact type does not need to be directly connected to the measured object, and the displacement is measured through electromagnetic or optical signal transmission. [0003] However, for high-speed switching valves, the spool is sealed inside the magnetic isolation tube, which cannot be connected with traditional contact displacement sensors, and displacement measurement cannot be performed. For the non-contact magnetostric...

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a valve core displacement measurement test bench to solve the technical problem in the prior art that the valve core displacement cannot be measured for high-speed switching valves

Images