Research on Dynamic Sealing Performance of Combined Sealing Structure under Extreme Working Conditions

IF 2.5 4区综合性期刊 Q2 CHEMISTRY, MULTIDISCIPLINARY Applied Sciences-Basel Pub Date : 2023-09-07 DOI:10.3390/app131810100

Shengpeng Zheng, Xiaoping Xiao, Xin Ma, Zisheng Li, Yitao Liu, J. Li, Dongyu Wang, Xiang Li

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Abstract

This study investigates the sealing performance of a combined sealing structure under extremely high and low temperature conditions, considering potential issues like high-temperature aging and low-temperature brittle fracture, which can lead to sealing failure. EPDM rubber underwent uniaxial compression tests at high, low, and normal temperatures, then the sealing performance under extreme working conditions was compared with that under normal temperature conditions. Additionally, the influences of gasket parameters and gas pressure on the sealing performance were analyzed. The result shows that compared with the normal temperature conditions, the maximum von Mises stress is reduced by 65% and the effective sealing length and the maximum contact pressure is reduced by 40% under the high temperature conditions, while the maximum von Mises stress is increased by 7 times and the maximum contact pressure is increased by a remarkable 7 times under the low temperature conditions. In the range of 10–100 MPa, the increase in gas pressure aggravates the O-ring stress concentration and improves the sealing performance relatively. When the thickness of gasket is 0.85–1.05 mm, the stress concentration of the O-ring is lighter and the sealing performance is better.

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极端工况下组合式密封结构动密封性能研究

本研究研究了组合密封结构在极高和低温条件下的密封性能，考虑到可能导致密封失效的高温老化和低温脆性断裂等潜在问题。三元乙丙橡胶在高温、低温和常温下进行了单轴压缩试验，并与常温下的密封性能进行了比较。此外，还分析了垫片参数和气压对密封性能的影响。结果表明，与常温条件相比，高温条件下最大von Mises应力降低了65%，有效密封长度和最大接触压力降低了40%，而在低温条件下，最大von Mises应力增加了7倍，最大接触压力显著增加了7次。在10–100 MPa范围内，气体压力的增加加剧了O型环的应力集中，并相对提高了密封性能。当垫片厚度为0.85–1.05 mm时，O型环的应力集中度较轻，密封性能较好。

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来源期刊

Applied Sciences-Basel CHEMISTRY, MULTIDISCIPLINARYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.30

自引率

11.10%

发文量

10882

期刊介绍： Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.