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VACUUM ›› 2026, Vol. 63 ›› Issue (1): 88-96.doi: 10.13385/j.cnki.vacuum.2026.01.14

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Optimization Design of Bellows Structure for Electron Beam Melting Equipment

YAN Chao1,2, JIA Zizhao1,2   

  1. 1. National Key Laboratory of Particle Transport and Separation Technology, Tianjin 300180, China;
    2. Research Institute of Physics and Chemistry Engineering of Nuclear Industry, Tianjin 300180, China
  • Received:2025-02-08 Online:2026-01-25 Published:2026-02-02

Abstract: As the core component of the electron beam melting system, the evaporator relies on bellows for connections at critical points in its water circuit,which experience bending failure during operation. This paper conducts a failure analysis on the existing bellows A used in the evaporator. Based on design specifications, the bellows structure is optimized, completing design calculations for pressure resistance, fatigue life, stiffness, and stability. A numerical simulation model was established to perform finite element analysis on stress, deformation, and internal flow resistance. Ultimately, two optimized structures, bellows B and C, are determined. Simultaneously, the type tests were performed on bellows B and C to verify the sealing, pressure resistance, stiffness, stability, and fatigue life. The final results indicate that both redesigned bellows meet design requirements, demonstrating excellent overall performance.

Key words: bellows, structural optimization, finite element simulation, type test

CLC Number:  TQ053.6

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