基于有限单元法密封结构影响因素建模分析  

Modeling and Analysis of Influencing Factors of Sealing Structure Based on Finite Element Method

作　　者：户燕会[1,2] 方雅 户东亮 姜奎 HU Yan-hui;FANG Ya;HU Dong-liang;JIANG Kui(School of Mechanical Engineering,He’nan Polytechnic Institute,He’nan Nanyang 473000,China;Sino-German College of Applied Sciences,Tongji University,Shanghai 201804,China;State Power Investment Corporation Nanyang Thermal Power Co.,Ltd.,He’nan Nanyang 473000,China;Nanyang Changgong Machinery Technology Co.,Ltd.,He’nan Nanyang 473000,China)

机构地区：[1]河南工业职业技术学院机械工程学院,河南南阳473000 [2]同济大学中德工程学院,上海201804 [3]国电投南阳热电有限责任公司,河南南阳473000 [4]南阳长弓机械科技有限公司,河南南阳473000

出　　处：《机械设计与制造》2024年第4期205-208,213,共5页Machinery Design & Manufacture

基　　金：河南省南阳市科技攻关项目(KJGG019)。

摘　　要：密封圈结构对高压试验装置的密封性、承压性具有直接影响。依据高压试验装置的结构特点,对O型密封结构进行结构参数分析,基于Mooney-Rivlin模型对特性进行分析;利用MARC有限元分析的方法对O型圈进行密封分析,分析不同密封间隙和槽深的尺寸下,接触压应力和Von Mises应力的大小,基于分析结果,优选密封间隙和槽深参数。结果可知:密封间隙为(0.04~0.14)mm间,压缩率为(10~20)%间,能够满足设计承载条件下的密封要求;通过对影响因素分析发现,密封间隙与Von Mises应力正相关,与接触应力负相关;压缩率提升,Von Mises应力先增后降,最大接触应力先降后增;80MPa压力下,较小密封间隙、压缩率对密封结构承载是有利的;通过分析设计密封圈影响趋势,发现参数的最优解为间隙0.043mm,槽深5.357mm,压缩率为10%。分析方法和研究结果可为超高压压力容器O型密封结构设计提供参考依据。The sealing ring structure has a direct impact on the sealing and pressure resistance of the high-pressure testing device.Based on the structural characteristics of the high-pressure testing device,analyze the structural parameters of the O-shaped seal-ing structure,and analyze the characteristics based on the Mooney Rivlin model.Using MARC finite element analysis method to analyze the sealing of O-ring,the size of contact pressure stress and Von Mises stress under different sealing clearances and groove depths are analyzed.Based on the analysis results,the sealing clearance and groove depth parameters are optimized.The results show that the sealing gap is between 0.04 and 0.14mm,and the compression rate is between 10%and 20%,which can meet the sealing requirements under the designed bearing conditions.Through analysis of influencing factors,it was found that the sealing gap is positively correlated with Von Mises stress and negatively correlated with contact stress.As the compression ra-tio increases,the Von Mises stress first increases and then decreases,and the maximum contact stress first decreases and then in-creases.Under a pressure of 80MPa,a smaller sealing gap and compression ratio are beneficial for the load-bearing capacity of the sealing structure.By analyzing the trend of sealing ring design,it was found that the optimal solution for the parameters is a clearance of 0.043mm,a groove depth of 5.357mm,and a compression rate of 10%.The analysis methods and research results can provide reference for the design of O-shaped sealing structures in ultra-high pressure vessels.

关 键 词：密封结构 影响因素 有限单元法 O形圈 高压试验装置 

分 类 号：TH16[机械工程—机械制造及自动化] U463.212[机械工程—车辆工程]