Fatigue test method for metal diaphragm of diaphragm compressor

Abstract

The invention discloses a fatigue test method for a metal diaphragm of a diaphragm compressor. The method comprises the following steps of S0, designing the shape of a diaphragm test piece through simulation, enabling the fundamental frequency of the diaphragm test piece to be about 200Hz which is several times of the running frequency of a diaphragm in a compressor, shortening the fatigue test time, and ensuring that the maximum stress appears at a required part at the same time; S1, pressing and fixing the diaphragm test piece on a vibration table in a cantilever form; S2, determining the fundamental frequency of the diaphragm test piece through the maximum deformation of the diaphragm test piece; S3, adjusting the acceleration of the vibration table and enabling the stress of the test sample piece to reach a required test stress value; and S4, when the diaphragm test piece is damaged, obtaining the actual fatigue life of the compressor operation diaphragm through conversion. According to the present invention, the performance of the diaphragm is predicted in advance, the performance can be improved in advance, the development period is shortened, and the development efficiency and reliability are improved; the testing device and the testing steps are simple, and the fatigue life of the diaphragm can be conveniently and directly tested.

Description

technical field [0001] The invention relates to a metal diaphragm fatigue testing method of a diaphragm compressor. Background technique [0002] The diaphragm compressor divides the system into a hydraulic part and a gas part through a diaphragm, and the hydraulic oil periodically pushes the diaphragm to reciprocate to compress the gas, thereby realizing high-pressure compression of the gas. At present, diaphragm compressors have been widely used in food industry, petroleum industry, chemical industry, aerospace, medicine, scientific research and other fields. [0003] The metal diaphragm is a key component of the diaphragm compressor, and its life directly affects the reliability of the diaphragm compressor. When selecting diaphragm materials, it is necessary to perform fatigue tests on the materials to test the reliability of the metal diaphragm. At present, the reliability test of the diaphragm of the diaphragm compressor is carried out on the whole machine, so the tes...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the metal diaphragm of the diaphragm compressor diaphragm in the prior art has a long test cycle, high cost, and the performance of the diaphragm cannot be known in advance, and provides a diaphragm compressor metal diaphragm fatigue testing method

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