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On-line Access: 2022-05-10

Received: 2021-08-17

Revision Accepted: 2021-12-15

Crosschecked: 2022-05-11

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Jin-yuan Qian

https://orcid.org/0000-0002-5438-0833

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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.4 P.247-256

http://doi.org/10.1631/jzus.A2100395


Seal contact performance analysis of soft seals on high-pressure hydrogen charge valves


Author(s):  Zhen-hao LIN, Long-jie YU, Ting-feng HUA, Zhi-jiang JIN, Jin-yuan QIAN

Affiliation(s):  Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   qianjy@zju.edu.cn

Key Words:  Charge valve, Seal contact performance, High-pressure hydrogen storage cylinder (HP-HSC), Finite element analysis (FEA)


Zhen-hao LIN, Long-jie YU, Ting-feng HUA, Zhi-jiang JIN, Jin-yuan QIAN. Seal contact performance analysis of soft seals on high-pressure hydrogen charge valves[J]. Journal of Zhejiang University Science A, 2022, 23(4): 247-256.

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author="Zhen-hao LIN, Long-jie YU, Ting-feng HUA, Zhi-jiang JIN, Jin-yuan QIAN",
journal="Journal of Zhejiang University Science A",
volume="23",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2100395"
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%T Seal contact performance analysis of soft seals on high-pressure hydrogen charge valves
%A Zhen-hao LIN
%A Long-jie YU
%A Ting-feng HUA
%A Zhi-jiang JIN
%A Jin-yuan QIAN
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%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2100395

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T1 - Seal contact performance analysis of soft seals on high-pressure hydrogen charge valves
A1 - Zhen-hao LIN
A1 - Long-jie YU
A1 - Ting-feng HUA
A1 - Zhi-jiang JIN
A1 - Jin-yuan QIAN
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2100395


Abstract: 
The charge valve is an important element in the charging port of a high-pressure hydrogen storage cylinder (HP-HSC). It is normally closed after the HP-HSC is filled with hydrogen. If the seal of the charge valve is damaged, it will seriously affect the stable operation of the hydrogen supply system and may even cause safety problems. Therefore, the seal performance of the charge valve is important. In this paper, finite element analysis (FEA) is carried out to analyze the seal contact performance of hydrogenated nitrile rubber (HNBR) gaskets in the seal pair of a charge valve. The effects of different pre-compressions, seal widths, and hydrogen pressures on the seal contact performance of the charge valve are analyzed. The contact pressure on the seal surface increases with the increase of pre-compression. With a pre-compression of 2.5 mm, the maximum contact pressure without and with hydrogen pressure are 68.51 and 107.38 MPa, respectively. A contact gap appears in the inner ring of the seal surface with pre-compression below 0.15 mm. The contact gap occurs between the entire seal surface with a seal width of 1 mm. The contact pressure on the seal surface and the width of the separation area between the seal surfaces increase with the increase of the seal width. The contact gap between the seal surfaces is zero with a width of 2.5 mm. The width of the separation area between the seal surfaces decreases with the decrease of the hydrogen pressure. The width of the separation area is reduced from 0.5 mm at 35 MPa to 0.17 mm at 15 MPa. This work can be useful for improvement of the seal performance and of the design of the charge valve used in the HP-HSC.

高压充氢阀软密封接触性能分析

作者:林振浩1,于龙杰1,华霆锋1,金志江1,3,钱锦远1,2
机构:1浙江大学,化工机械研究所,中国杭州,310027;2浙江大学,流体动力与机电系统国家重点实验室,中国杭州,310027;3浙江大学,温州研究院,中国温州,325036
目的:充氢阀阀座良好的软密封性能是保障高压储氢瓶氢气不泄漏的一个关键因素。本文旨在探讨密封预压缩量、密封宽度和氢气压力对软密封元件接触压力和接触间隙的影响规律。
创新点:建立非线性有限元分析模型,在不同预压缩量、密封宽度和氢气压力下对密封接触特性进行动态分析。
方法:1.建立不同预压缩量的数值模型,比较分析在不同密封预压缩量下接触间隙和接触压力在密封面上的分布(图6);2.建立不同密封宽度的数值模型,对比分析在不同密封宽度下密封间隙和密封压力的动态变化过程(图9);3.改变氢气压力值,比较在不同氢气压力下软密封的应力强度和接触特性(图10和11)。
结论:1.密封面上的接触压力随着预压缩量的增加而增大;当预紧压缩量减小到一定值时会出现接触间隙大于零的区域。2.随着密封宽度的增加,密封面上的接触压力和密封面之间分离区域的宽度也随之增加。3.随着氢气压力的降低,密封面之间的分离区域的宽度相应减小。

关键词:充氢阀,密封接触性能,高压储氢罐,有限元分析

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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