Structure Optimization of Membrane Cavity Profile of Diaphragm Compressor Based on Deflection Index
In order to solve the problem of diaphragm rupture in diaphragm compressors,a FB diaphragm compressor was taken as the prototype to study the operation mechanism of diaphragm group and explore the influence of the variation of membrane cavity deflection index on diaphragm operation.Based on the theory of large deflection of thin plate,the maximum stress on the upper and lower surfaces of the diaphragm was calculated,and the minimum stress on the membrane cavity profile was obtained by changing the membrane cavity deflection index.The finite element analysis software was used to simulate the results,which verified that the center of the upper surface of the diaphragm and the edge of the lower surface of the diaphragm were the most vulnerable to failure.At the same time,it was concluded that when the deflection index of the membrane cavity profile was 2.9,the stress on the upper and lower surfaces of the diaphragm was the least and the stress intensity was almost equal.The radial stress of the optimized diaphragm decreased by about 14%compared with that before optimization.The service life of the diaphragm is extended.
diaphragm compressordiaphragmsfinite element analysisdeflection index
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