The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings

The performance of air foil journal bearings is closely related to the stiffness of the bump foil. In this paper, the stiffness characteristics of bump foil having a rounding in the structure are investigated and compared with previous models. The dynamic coefficients of bearings and the stability t...

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Autores principales:	Hongyang Hu, Ming Feng
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	foil journal bearing rounding radius dynamic coefficients stability threshold speed (sts) Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/0d150ed4f5864358a0331c0acae629be
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id	oai:doaj.org-article:0d150ed4f5864358a0331c0acae629be
record_format	dspace
spelling	oai:doaj.org-article:0d150ed4f5864358a0331c0acae629be2021-11-05T09:17:25ZThe Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings1881-219810.2474/trol.14.301https://doaj.org/article/0d150ed4f5864358a0331c0acae629be2019-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/5/14_301/_pdf/-char/enhttps://doaj.org/toc/1881-2198The performance of air foil journal bearings is closely related to the stiffness of the bump foil. In this paper, the stiffness characteristics of bump foil having a rounding in the structure are investigated and compared with previous models. The dynamic coefficients of bearings and the stability threshold speed (STS) of a rotor supported by the bearings are numerically calculated using FEM and are compared to models with various rounding radius and friction coefficients. The results show that the presence of rounding indicates a significant effect on the total dynamic and the stability performance of foil bearings and there is an optimum rounding radius to maximize the structural stiffness and stability. The validity of the theoretical analysis was verified by the structural stiffness and stability experiments. The results are expected to be helpful to bearing designers, researchers, and academicians concerned.Hongyang HuMing FengJapanese Society of Tribologistsarticlefoil journal bearingrounding radiusdynamic coefficientsstability threshold speed (sts)PhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 5, Pp 301-311 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	foil journal bearing rounding radius dynamic coefficients stability threshold speed (sts) Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	foil journal bearing rounding radius dynamic coefficients stability threshold speed (sts) Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hongyang Hu Ming Feng The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
description	The performance of air foil journal bearings is closely related to the stiffness of the bump foil. In this paper, the stiffness characteristics of bump foil having a rounding in the structure are investigated and compared with previous models. The dynamic coefficients of bearings and the stability threshold speed (STS) of a rotor supported by the bearings are numerically calculated using FEM and are compared to models with various rounding radius and friction coefficients. The results show that the presence of rounding indicates a significant effect on the total dynamic and the stability performance of foil bearings and there is an optimum rounding radius to maximize the structural stiffness and stability. The validity of the theoretical analysis was verified by the structural stiffness and stability experiments. The results are expected to be helpful to bearing designers, researchers, and academicians concerned.
format	article
author	Hongyang Hu Ming Feng
author_facet	Hongyang Hu Ming Feng
author_sort	Hongyang Hu
title	The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
title_short	The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
title_full	The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
title_fullStr	The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
title_full_unstemmed	The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings
title_sort	effect of rounding in bump foil structure on the dynamic performance of foil journal bearings
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/0d150ed4f5864358a0331c0acae629be
work_keys_str_mv	AT hongyanghu theeffectofroundinginbumpfoilstructureonthedynamicperformanceoffoiljournalbearings AT mingfeng theeffectofroundinginbumpfoilstructureonthedynamicperformanceoffoiljournalbearings AT hongyanghu effectofroundinginbumpfoilstructureonthedynamicperformanceoffoiljournalbearings AT mingfeng effectofroundinginbumpfoilstructureonthedynamicperformanceoffoiljournalbearings
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The Effect of Rounding in Bump Foil Structure on the Dynamic Performance of Foil Journal Bearings

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