基于挠度指数的隔膜压缩机膜腔的结构优化  

Structure Optimization of Membrane Cavity Profile of Diaphragm Compressor Based on Deflection Index

作　　者：隋沅晟 张秀珩[1] 曹家维 白皓元 SUI Yuan-sheng;ZHANG Xiu-heng;CAO Jia-wei;BAI Hao-yuan(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110000,China)

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110000

出　　处：《压缩机技术》2024年第1期20-24,共5页Compressor Technology

摘　　要：为了解决隔膜压缩机中膜片经常破裂的问题,以某FB型隔膜压缩机为原型,对膜片组运行机理进行研究,探索膜腔挠度指数变化时对膜片运行情况的影响。基于薄板大挠度理论计算得出膜片上下表面所受应力最大的位置,通过改变膜腔挠度指数,得出膜片所受应力最小的膜腔型线。运用有限元分析软件进行模拟仿真,结果验证了膜片上表面的中心处和膜片下表面的边缘处最易破坏,同时得出膜腔型线的挠度指数在2.9时,可使膜片的上下表面所受应力最小且应力强度几乎相等,优化后的膜片所受径向应力相比优化前下降了14%左右,延长了膜片的使用寿命。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.

关 键 词：隔膜压缩机 膜片组 有限元分析 挠度指数 

分 类 号：TH45[机械工程—机械制造及自动化]