流体机械2025，Vol.53Issue(4)：83-92,10.DOI:10.3969/j.issn.1005-0329.2025.04.012
90 MPa高压隔膜压缩机油缸优化设计
Cylinder optimization design of 90 MPa high-pressure diaphragm compressor
摘要
Abstract
To address the cylinder fracture issue in 90 MPa diaphragm compressors for hydrogen refueling stations,a thermo‑mechanical coupling model of the high‑pressure stage membrane head was established using Ansys Workbench finite element analysis software.The cylinder strength was analyzed,and an improved through‑hole bolt cylinder connection structure was proposed and verified.Results show that when the cylinder bottom fillet radius is 0.5 mm,the local stress reaches 1 665 MPa,exceeding the material yield strength and causing stress concentration,leading to fatigue failure under cyclic alternating loads.Increasing the fillet radius to 3 mm reduces the maximum stress to 793 MPa,meeting strength requirements.The improved through‑hole bolt structure reduces the maximum stress by 17%for cylinders with the same fillet radius.At a 3 mm fillet radius,the optimized structure achieves a maximum stress of 649 MPa,satisfying design specifications.This study provides reference for structural design of 90 MPa diaphragm compressor cylinders.关键词
隔膜压缩机/油缸失效/热固耦合模型/塑性变形/通孔油缸结构Key words
diaphragm compressor/cylinder failure/thermo‑mechanical coupling model/plastic deformation/through‑hole cylinder structure分类
通用工业技术引用本文复制引用
李凯,任省栋,张升涛,贾晓晗..90 MPa高压隔膜压缩机油缸优化设计[J].流体机械,2025,53(4):83-92,10.基金项目
内蒙古自治区科技重大专项(2020ZD0022) （2020ZD0022）
