Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model

To analyze the cause and mechanism of oil mist escaping from the lower guide bearing during the operation of a turbine, the oil-gas mixture in the lower guide bearing was numerically simulated by using the VOF two-phase flow model and the SST turbulence model. The influences of different sealing cle...

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Autores principales:	Jiayang Pang, Huizi Liu, Xiaobing Liu, Minghui Ren, Pan Zhang, Zhishun Yu
Formato:	article
Lenguaje:	EN
Publicado:	SAGE Publishing 2021
Materias:	Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/80b1628583fe447eae3ad35a1f15de73
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spelling	oai:doaj.org-article:80b1628583fe447eae3ad35a1f15de732021-12-02T03:34:03ZAnalysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model1687-814010.1177/16878140211060929https://doaj.org/article/80b1628583fe447eae3ad35a1f15de732021-11-01T00:00:00Zhttps://doi.org/10.1177/16878140211060929https://doaj.org/toc/1687-8140To analyze the cause and mechanism of oil mist escaping from the lower guide bearing during the operation of a turbine, the oil-gas mixture in the lower guide bearing was numerically simulated by using the VOF two-phase flow model and the SST turbulence model. The influences of different sealing clearances and speeds on the flow field and the oil-gas distribution in the oil tank were studied, and the escaping characteristics of oil mist were analyzed. The results show that increasing the clearance of the labyrinth seal will reduce the pressure difference between the inside and outside of the oil tank and reduce the driving force for the escape of the oil mist. However, increasing the clearance will increase the turbulence of the flow field, the number and volume of bubbles in the lubricating oil, which will lead to the uneven distribution of oil and gas and reduce the motion stability of the lower guide bearing. The change of speed will affect the normal use of the shaft-collar pump. High speed will aggravate the generation of bubbles in the oil tank and increase the possibility of cavitation in the lower guide bearing structure. In engineering practices, it is necessary to comprehensively consider factors such as oil mist escape phenomenon, economic benefits, process manufacturing and assembly, and adopt the lower guide bearing structure with a suitable labyrinth seal clearance.Jiayang PangHuizi LiuXiaobing LiuMinghui RenPan ZhangZhishun YuSAGE PublishingarticleMechanical engineering and machineryTJ1-1570ENAdvances in Mechanical Engineering, Vol 13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Mechanical engineering and machinery TJ1-1570
spellingShingle	Mechanical engineering and machinery TJ1-1570 Jiayang Pang Huizi Liu Xiaobing Liu Minghui Ren Pan Zhang Zhishun Yu Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
description	To analyze the cause and mechanism of oil mist escaping from the lower guide bearing during the operation of a turbine, the oil-gas mixture in the lower guide bearing was numerically simulated by using the VOF two-phase flow model and the SST turbulence model. The influences of different sealing clearances and speeds on the flow field and the oil-gas distribution in the oil tank were studied, and the escaping characteristics of oil mist were analyzed. The results show that increasing the clearance of the labyrinth seal will reduce the pressure difference between the inside and outside of the oil tank and reduce the driving force for the escape of the oil mist. However, increasing the clearance will increase the turbulence of the flow field, the number and volume of bubbles in the lubricating oil, which will lead to the uneven distribution of oil and gas and reduce the motion stability of the lower guide bearing. The change of speed will affect the normal use of the shaft-collar pump. High speed will aggravate the generation of bubbles in the oil tank and increase the possibility of cavitation in the lower guide bearing structure. In engineering practices, it is necessary to comprehensively consider factors such as oil mist escape phenomenon, economic benefits, process manufacturing and assembly, and adopt the lower guide bearing structure with a suitable labyrinth seal clearance.
format	article
author	Jiayang Pang Huizi Liu Xiaobing Liu Minghui Ren Pan Zhang Zhishun Yu
author_facet	Jiayang Pang Huizi Liu Xiaobing Liu Minghui Ren Pan Zhang Zhishun Yu
author_sort	Jiayang Pang
title	Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
title_short	Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
title_full	Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
title_fullStr	Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
title_full_unstemmed	Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model
title_sort	analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on vof model
publisher	SAGE Publishing
publishDate	2021
url	https://doaj.org/article/80b1628583fe447eae3ad35a1f15de73
work_keys_str_mv	AT jiayangpang analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel AT huiziliu analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel AT xiaobingliu analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel AT minghuiren analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel AT panzhang analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel AT zhishunyu analysisontheescapephenomenonofoilmistfromturbinelowerguidebearingbasedonvofmodel
_version_	1718401737950232576

Analysis on the escape phenomenon of oil mist from turbine lower guide bearing based on VOF model

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