Rolling friction piston pressure gauge

Abstract

The invention discloses a rolling friction piston pressure gauge, which comprises a special poise, a checker and a rolling friction piston cylinder, wherein the rolling friction piston cylinder comprises a piston, a cylinder barrel, a cylinder cover, an elastic retainer ring, a positioning sleeve, a sealing ring and linear rolling bearings; the cylinder cover sleeved with the sealing ring is fixedly arranged at the bottom end of the cylinder barrel through a screw; the piston is contacted with rolling bodies of the two linear rolling bearings; each linear rolling bearing is axially positionedby using the elastic retainer ring or / and the positioning sleeve; a flange linear rolling bearing is fastened with the cylinder barrel through a screw; the piston is in clearance fit with the inner wall of the cylinder barrel between two bearing positioning installation holes on the cylinder barrel; a clearance delta is 2-20 mum; the fitting length L is 10-20d; d is the piston diameter and is 1-20 millimeters; the special poise acts at the top end of the piston; and the checker is connected with a drainage port and an oil inlet channel pipeline of the rolling friction piston cylinder through a No.1 cutoff valve and a No.3 cutoff valve.

Description

technical field [0001] The invention relates to a standard pressure measurement verification device. More specifically, it relates to a rolling friction piston pressure gauge applied to calibration, verification and calibration of pressure instruments. Background technique [0002] Various pressure gauges, pressure sensors and other pressure measurement test instruments serving the pressure measurement test are widely used, and these pressure measurement test instruments all need calibration, verification and calibration. Piston pressure gauge is an indispensable standard instrument for pressure measurement detection, calibration and value transmission, and is widely used in metrology institutes, military units and industrial production enterprises at all levels. [0003] Piston pressure gauges work according to Pascal's law and the principle of hydrostatic pressure. The piston system is composed of a piston and a piston cylinder. Ideally, when the measured pressure acts o...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the sliding friction has a great influence on the precision in the prior art, and many steps need to be completed manually, the control is difficult, time-consuming and laborious, and various errors are generated due to human factors. The present invention overcomes the above problems and provides a It is a rolling friction piston pressure gauge that reduces the friction force of the piston cylinder, automatically compensates the oil leakage, simplifies the manufacturing process, is easy to operate, and has high working accuracy

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