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Research on the Application of Metal Bellows in Sealing Compensation of Cryogenic Coupling
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Quankun BA, Weiqi DAI, Jianqiu WANG, Zhongming LIU, Xuelei XU
Missiles and Space Vehicles | 2025, 48(3) : 38 - 44
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Missiles and Space Vehicles | 2025, 48(3): 38-44
• Launch Support •
Research on the Application of Metal Bellows in Sealing Compensation of Cryogenic Coupling
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Quankun BA, Weiqi DAI, Jianqiu WANG, Zhongming LIU, Xuelei XU
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  • Beijing Institute of Space Launch Technology, Beijing, 100076
Published: 2025-06-25 doi: 10.7654/j.issn.2097-1974.20250306
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The cryogenic coupling is the key equipment between the rocket and the ground filling system. It is mainly used for the filling, draining,venting of cryogenic propellant, such as liquid hydrogen, liquid oxygen, liquid methane, etc. The sealing reliability of the cryogenic coupling is crucial to the launch mission. According to the application characteristics of cryogenic coupling, the performance parameters and structural parameters of the metal bellows are proposed.The stiffness, strength and fatigue life of the metal bellows are obtained by theoretical calculation. The stress distribution, contact state, stiffness and residual deformation of the metal bellows at normal temperature are obtained by simulation analysis, and the influence of low temperature on the stress and stiffness of the metal bellows is analyzed. The stiffness test, life test and performance tests of the cryogenic coupling are carried out, and the test data are in good fit with theoretical calculation and simulation analysis. The feasibility of the application of the metal bellows in cryogenic couplings for the seal compensation is verified.

cryogenic coupling  /  metal bellow  /  seal  /  axial stiffness  /  residual deformation
Quankun BA, Weiqi DAI, Jianqiu WANG, Zhongming LIU, Xuelei XU. Research on the Application of Metal Bellows in Sealing Compensation of Cryogenic Coupling[J]. Missiles and Space Vehicles, 2025 , 48 (3) : 38 -44 . DOI: 10.7654/j.issn.2097-1974.20250306
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Year 2025 volume 48 Issue 3
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doi: 10.7654/j.issn.2097-1974.20250306
  • Receive Date：2024-09-16
  • Online Date：2025-10-27
  • Published：2025-06-25
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  • Received：2024-09-16
  • Revised：2024-12-10
Affiliations
    Beijing Institute of Space Launch Technology, Beijing, 100076
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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