天然气与石油2025，Vol.43Issue(5)：125-134,10.DOI:10.3969/j.issn.1006-5539.2025.05.016
中低压氢环境下橡胶O形圈密封性能仿真分析
Simulation analysis of rubber O-ring sealing performance in low and medium pressure hydrogen environments
摘要
Abstract
To investigate the changing patterns of rubber O-ring sealing performance parameters under multi-factor coupling,ABAQUS finite element software is used to establish a two-dimensional model of the flange sealing assembly under low-and-medium pressure hydrogen environments.Through comparison,it is found that the sealing performance parameters of the O-rings do not change significantly with the cross-section diameter under the pure hydrogen pressure of 0.5～2.0 MPa.When the pressure is increased to 5.0 MPa,the contact stress and Mises stress of the seals increase significantly under pure hydrogen environment.Further increasing the cross-section diameter leads to increased contact stress and decreased Mises stress,which in turn improves the sealing performance of the sealing system.The contact stress increases with increasing pressure and pre-compression rate,but the relationship between Mises stress and gas pressure and pre-compression rate is more complicated.When pressure is≤1.0 MPa,the peak Mises stress increases with increasing pre-compression,which is unfavorable for the sealing.At a pressure of 2.0 MPa,the peak Mises stress shows a decreasing then increasing trend with increasing pre-compression rate,indicating a minimum value of Mises stress.At 5.0 MPa,the peak stress decreases with increasing pre-compression rate,which can improve the sealing performance of the assembly.The hydrogen swelling effect of rubber O-rings is relatively small in low and medium pressure hydrogen environments.Change in the hydrogen blending ratio did not significantly affect the sealing performance parameters of the rubber O-rings when the cross-sectional diameter and the pre-compression ratio were fixed.The research results can provide an effective reference for the study of pure hydrogen or hydrogen-blended pipeline sealing systems.关键词
橡胶O形圈/吸氢膨胀/掺氢比/密封性能Key words
Rubber O-ring/Swelling behavior induced by hydrogen/Hydrogen blending ratio/Sealing performance引用本文复制引用
张捷,朱建鲁,李玉星,刘翠伟,陆玉臣..中低压氢环境下橡胶O形圈密封性能仿真分析[J].天然气与石油,2025,43(5):125-134,10.基金项目
国家重点研发计划"氢能技术"重点专项资助"中低压纯氢与掺氢燃气管道扩散机理与相容性研究"(2021YFB4001601) （2021YFB4001601）
