摘要
针对高超声速飞行器起落架舱门密封结构存在的流体泄漏问题,以P型橡胶密封圈为研究对象,采用有限元仿真分析与密封试验相结合的方法,对密封结构的密封泄漏特性进行了研究。首先,准备了待测密封件(橡胶P型密封圈),并依据其固有理化特性以及试验需求与目标,搭建了密封测试用试验器工装与配套控制系统;然后,建立了试验器及P型密封圈的有限元模型,并结合实际工况条件施加了载荷与边界条件,进行了试验器主体的有限元热分析和P型圈的有限元压缩仿真分析;最后,设计了测试方案,在不同压缩率以及不同开孔数目的工况条件下,对各类密封件开展了常温与高温气体泄漏量检测试验。研究结果表明:P型圈的密封性能对压缩率和开孔数的变化较为敏感,在一定压缩率范围内,其泄漏量随压缩率的增大而减小;以恒定方向通入流体,其泄漏量随密封介质开孔数的增加而减小,且呈倍率线性函数关系。
Aiming at the fluid leakage problem of the landing gear door sealing structure of hypersonic aircraft,P-type rubber seals were used as research objects,the sealing leakage characteristics of the sealing structure were studied by combining finite element simulation analysis and sealing test.Firstly,the seal to be tested(rubber P-ring)was prepared,and according to its inherent physical and chemical properties and test requirements and goals,the tester tooling and supporting control system for the sealing test were independently designed and built.Then,the finite element model of the tester and the P-type sealing ring was established,loads and boundary conditions combined with actual operating circumstances were used,and the finite element thermal analysis of the tester body and the finite element compression simulation analysis of the P-ring were carried out.Finally,test scheme was designed,under the conditions of different compression ratios and different numbers of openings,the gas leakage detection tests of various types of seals at room temperature and high temperature were carried out.The results indicate that the sealing performance of the P-ring is more sensitive to changes in the compression rate and the number of openings,within a certain compression ratio range,the leakage decreases with the increase of the compression ratio.When the fluid is passed in a constant direction,the leakage decreases with the increase of the number of openings in the sealing medium,which is a linear function of magnification.
作者
郭仪翔
陈立芳
GUO Yi-xiang;CHEN Li-fang(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Key Laboratory of High End Mechanical Equipment Health Monitoring and Self Recovery,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《机电工程》
CAS
北大核心
2023年第2期258-265,274,共9页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51775030,91860126)。
关键词
橡胶密封圈
高温热密封
压缩率
密封试验系统
泄漏试验
P型密封圈
有限元热分析
rubber sealing ring
high-temperature heat seal
compression rate
sealing test system
leakage test
P-seal
finite element thermal analysis
