Design and Experimental Verification for Diaphragm Compressor Cavity Profile by Two Exponential Terms Generatrix

doi:10.7652/xjtuxb201404022

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Design and Experimental Verification for Diaphragm Compressor Cavity Profile by Two Exponential Terms Generatrix

更新时间：2025-04-29

- Design and Experimental Verification for Diaphragm Compressor Cavity Profile by Two Exponential Terms Generatrix
- Vol. 48, Issue 4, Pages: 127-132(2014)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201404022
  CLC： TH456
- Online First：10 April 2014，
  
  Published：2014
- 稿件说明：
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Design and Experimental Verification for Diaphragm Compressor Cavity Profile by Two Exponential Terms Generatrix[J]. 2014, 48(4): 127-132.
DOI：

Design and Experimental Verification for Diaphragm Compressor Cavity Profile by Two Exponential Terms Generatrix[J]. 2014, 48(4): 127-132. DOI： 10.7652/xjtuxb201404022.

摘要

针对广泛使用的单指数母线膜腔型面进行了优化计算

分析了该型面的特点和不足

同时以增大膜腔容积、降低膜片应力为目标

提出了二指数母线膜腔型面。该二指数母线膜腔型面下的膜片径向应力峰值在膜片半径的中间及边缘处

这样可以避开与膜片中心区域附加应力叠加

使得膜片中心区域油侧和气侧面上的径向应力相同且均处于一个较低的水平。对比研究结果表明:在相同膜腔半径、相同膜片材料及膜片内应力均达到许用应力条件下

二指数母线膜腔容积相比单指数增大6.6%; 在相同膜腔半径、相同膜腔容积及相同膜片材料情况下

二指数母线膜腔下膜片最大径向应力相比单指数降低10.0%

膜片中心区域最大径向应力降低11.8%。

Abstract

The traditional generatrix of cavity profile is optimized and the characteristics of the traditional generatrix are discussed. A new generatrix of cavity profile of diaphragm compressor is presented for increasing cavity volume and decreasing diaphragm radial stress. With the new generatrix

the peak values of the diaphragm radial stresses occur in the middle of radius and edge

thus the radial stress in the diaphragm center gets lower. To verify the design theory for cavity profile

the radial stresses of the diaphragm oil side in the cavities with the new and traditional generatrices were tested

and the experimental radial stresses agree well with the theoretical ones. Additionally

the volumes of the cavities with different generatrices and the radial stress distribution of the diaphragm are theoretically analyzed. The results show that the cavity volume with the new generatrix is enlarged by 6.6% than that with the traditional generatrix under the same design conditions. The maximal radial stress in the cavity with the new generatrix decreases by 10.0% and the maximal radial stress in the centric region decreases by 11.8%.

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references

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