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Simulation analysis of sealing medium of a sealing structure and experimental research on its leakage characteristics

Published:2023-04-20 author:GUO Yi-xiang, CHEN Li-fang. Browse: 569 Check PDF documents

Simulation analysis of sealing medium of a sealing structure and

experimental research on its leakage characteristics

GUO Yi-xiang1, CHEN Li-fang1,2

(1.College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029,

China; 2.Beijing Key Laboratory of High End Mechanical Equipment Health Monitoring and Self Recovery, Beijing

University of Chemical Technology, Beijing 100029, China)

Abstract: 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.

Key words: rubber sealing ring; high-temperature heat seal; compression rate; sealing test system; leakage test; P-seal; finite element thermal analysis

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