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Stress analysis of self-tightness metal sealing against ultrahigh pressure medium

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Abstract

Stress is one of the most important factors in metal-to-metal sealing. In this paper, two methods (theoretical and empirical) were adopted to calculate the normal stress of the brass sealing surfaces against different ultrahigh pressure liquid. The theoretical formula was derived in terms of force balance, and the empirical formula was obtained by polynomial curve fitting, which the fitted data were from simulated results; besides, the results calculated using the empirical formula agree well with the results by theoretical formula. Meanwhile, the equivalent stresses of the brass seal, normal stress and contact stress on the brass seal surfaces were simulated by finite element method, and the simulated results indicated these stresses are increased with the increase of liquid pressure, and the maximum stresses always appear on the tip of the brass seal.

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Acknowledgementse

This work was supported by the Natural Science Foundation of the Jiansu Province of China (Grant No. BK20200999). Special thanks are also given to Prof. Renshu Yuan for his assistance in this study.

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Authors and Affiliations

  1. The School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    M. J. Zhao, P. C. Zhu, Z. Li, Z. Liu & C. Kang

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  1. M. J. Zhao
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  2. P. C. Zhu
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  3. Z. Li
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  4. Z. Liu
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  5. C. Kang
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Correspondence to M. J. Zhao.

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Zhao, M.J., Zhu, P.C., Li, Z. et al. Stress analysis of self-tightness metal sealing against ultrahigh pressure medium. Inflamm. Res. 72, 195–202 (2023). https://doi.org/10.1007/s00011-022-01583-1

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