整体式斯特林制冷机的密封泄漏分析  

Analysis on Leakage of Integral Stirling Cryocooler Seal

作　　者：刘湘德 甘玉梅[1] 段燕波 迟国春[1] 薛鼎 LIU Xiang-de;GAN Yu-mei;DUAN Yan-bo;CHI Guo-chun;XUE Ding(North China Research Institute of Electro-Optics,Beijing 100015,China)

机构地区：[1]华北光电技术研究所,北京100015

出　　处：《红外》2024年第10期1-7,共7页Infrared

摘　　要：整体式斯特林制冷机的主要失效原因有蓄冷器污染、运动摩擦副磨损、轴承失效、驱动控制电路失效以及气体工质密封泄漏。而气体工质密封泄漏问题是影响制冷机可靠性的最主要因素。影响制冷机密封性能的主要因素为密封表面加工质量、密封材料和密封结构。选取两款典型制冷机的密封结构作为研究对象,对制冷机的密封结构建立有限元模型。仿真结果表明,与轴对称结构相比,中心对称密封结构的应力分布更加均匀,有利于制冷机密封性能的改善。该结果也为后续制冷机生产工艺过程中提高可靠性以及新研发制冷机设计思路提供了参考借鉴。The main failure causes of the integral Stirling refrigerator are the contamination of the regenerator,the wear of the moving friction pair,the failure of the bearing,the failure of the drive control circuit and the leakage of the gas working medium seal.The leakage of the gas working medium seal is the most important factor affecting refrigerator reliability.The main factors affecting the sealing performance of refrigerators are sealing surface machining quality,sealing material and sealing structure.In this paper,the sealing structures of two typical refrigerators are selected as the research object,and the finite element models of the sealing structures of the refrigerators are established.The simulation results show that the stress distribution of the center symmetric seal structure is more uniform than that of the axisymmetric structure,which is beneficial to the improvement of the sealing performance of the refrigerator.The results also provide a reference for the improvement of reliability in the subsequent production process of the refrigerator and the design of the new refrigerator.

关 键 词：整体式斯特林制冷机 泄漏 密封可靠性 密封结构 有限元分析 

分 类 号：TB615[一般工业技术—制冷工程]