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Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals

For gas–liquid medium isolation seals in aero-engines, the upstream pumping function of directional grooves provides an effective way to realize the design of longer service life and lower leakage rate. However, this produces a new problem for gas–liquid mass transfer in the sealing clearance. This...

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Detalles Bibliográficos
Autores principales: Bai, Shaoxian, Hao, Jialin, Yang, Jing, Song, Yuansen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8874364/
https://www.ncbi.nlm.nih.gov/pubmed/35208020
http://dx.doi.org/10.3390/ma15041482
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author Bai, Shaoxian
Hao, Jialin
Yang, Jing
Song, Yuansen
author_facet Bai, Shaoxian
Hao, Jialin
Yang, Jing
Song, Yuansen
author_sort Bai, Shaoxian
collection PubMed
description For gas–liquid medium isolation seals in aero-engines, the upstream pumping function of directional grooves provides an effective way to realize the design of longer service life and lower leakage rate. However, this produces a new problem for gas–liquid mass transfer in the sealing clearance. This study establishes an analytical model to investigate the gas–liquid mass transfer behavior and the change rule for the opening force of mechanical face seals with elliptical grooves. Compared with traditional studies, this model considers not only the gas–liquid transfer but also the cavitation effect. The results obtained show that with the increase of rotational speed, the gas medium transferred from the inner low-pressure side to the outer high-pressure side. In addition, the leakage rate of the liquid medium from the outer high-pressure side to the inner low-pressure side increased with the growth of sealing clearance, rotational speed and seal pressure. The upstream pumping effect of the gas medium with elliptical grooves not only led to a state of gas–liquid mixed lubrication in the sealing surfaces, but also significantly increased the opening capacity of the seal face. This research may provide a reasonable basis for the design of upstream pumping mechanical face seals.
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spelling pubmed-88743642022-02-26 Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals Bai, Shaoxian Hao, Jialin Yang, Jing Song, Yuansen Materials (Basel) Article For gas–liquid medium isolation seals in aero-engines, the upstream pumping function of directional grooves provides an effective way to realize the design of longer service life and lower leakage rate. However, this produces a new problem for gas–liquid mass transfer in the sealing clearance. This study establishes an analytical model to investigate the gas–liquid mass transfer behavior and the change rule for the opening force of mechanical face seals with elliptical grooves. Compared with traditional studies, this model considers not only the gas–liquid transfer but also the cavitation effect. The results obtained show that with the increase of rotational speed, the gas medium transferred from the inner low-pressure side to the outer high-pressure side. In addition, the leakage rate of the liquid medium from the outer high-pressure side to the inner low-pressure side increased with the growth of sealing clearance, rotational speed and seal pressure. The upstream pumping effect of the gas medium with elliptical grooves not only led to a state of gas–liquid mixed lubrication in the sealing surfaces, but also significantly increased the opening capacity of the seal face. This research may provide a reasonable basis for the design of upstream pumping mechanical face seals. MDPI 2022-02-16 /pmc/articles/PMC8874364/ /pubmed/35208020 http://dx.doi.org/10.3390/ma15041482 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bai, Shaoxian
Hao, Jialin
Yang, Jing
Song, Yuansen
Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title_full Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title_fullStr Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title_full_unstemmed Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title_short Gas–Liquid Mass Transfer Behavior of Upstream Pumping Mechanical Face Seals
title_sort gas–liquid mass transfer behavior of upstream pumping mechanical face seals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8874364/
https://www.ncbi.nlm.nih.gov/pubmed/35208020
http://dx.doi.org/10.3390/ma15041482
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