Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings

Norifumi Miyanaga; Jun Tomioka

doi:10.4028/www.scientific.net/KEM.656-657.688

Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings

Norifumi Miyanaga, Jun Tomioka^*

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Hydrodynamic journal bearings induced serious shaft vibrations called oil whirl. Since they often give severe damages to the mechanical systems, it is important to fully understand the phenomenon to avoid the occurrence by the proper bearing design. This study theoretically and experimentally investigated both cylindrical and conical whirl instabilities, which can be appeared in journal bearings, and their relation was discussed. As the result, the span length of the bearings had a significant effect on the vibration mode. The transitional state in which the cylindrical and conical whirl instabilities alternately appeared was observed.

Original language	English
Title of host publication	Recent Development in Machining, Materials and Mechanical Technologies
Editors	Jyh-Chen Chen, Usuki Hiroshi, Sheng-Wei Lee, Yiin-Kuen Fuh
Publisher	Trans Tech Publications Ltd
Pages	688-693
Number of pages	6
ISBN (Print)	9783038354956
DOIs	https://doi.org/10.4028/www.scientific.net/KEM.656-657.688
Publication status	Published - 2015
Event	International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014 - Taipei City, Taiwan, Province of China Duration: 2014 Aug 31 → 2014 Sep 5

Publication series

Name	Key Engineering Materials
Volume	656-657
ISSN (Print)	1013-9826
ISSN (Electronic)	1662-9795

Other

Other	International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014
Country/Territory	Taiwan, Province of China
City	Taipei City
Period	14/8/31 → 14/9/5

Keywords

Conical whirl instability
Cylindrical whirl instability
Hydrodynamic bearings
Journal bearing

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.4028/www.scientific.net/KEM.656-657.688

Cite this

Miyanaga, N., & Tomioka, J. (2015). Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. In J-C. Chen, U. Hiroshi, S-W. Lee, & Y-K. Fuh (Eds.), Recent Development in Machining, Materials and Mechanical Technologies (pp. 688-693). (Key Engineering Materials; Vol. 656-657). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.656-657.688

Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. / Miyanaga, Norifumi; Tomioka, Jun.

Recent Development in Machining, Materials and Mechanical Technologies. ed. / Jyh-Chen Chen; Usuki Hiroshi; Sheng-Wei Lee; Yiin-Kuen Fuh. Trans Tech Publications Ltd, 2015. p. 688-693 (Key Engineering Materials; Vol. 656-657).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Miyanaga, N & Tomioka, J 2015, Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. in J-C Chen, U Hiroshi, S-W Lee & Y-K Fuh (eds), Recent Development in Machining, Materials and Mechanical Technologies. Key Engineering Materials, vol. 656-657, Trans Tech Publications Ltd, pp. 688-693, International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014, Taipei City, Taiwan, Province of China, 14/8/31. https://doi.org/10.4028/www.scientific.net/KEM.656-657.688

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abstract = "Hydrodynamic journal bearings induced serious shaft vibrations called oil whirl. Since they often give severe damages to the mechanical systems, it is important to fully understand the phenomenon to avoid the occurrence by the proper bearing design. This study theoretically and experimentally investigated both cylindrical and conical whirl instabilities, which can be appeared in journal bearings, and their relation was discussed. As the result, the span length of the bearings had a significant effect on the vibration mode. The transitional state in which the cylindrical and conical whirl instabilities alternately appeared was observed.",

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N2 - Hydrodynamic journal bearings induced serious shaft vibrations called oil whirl. Since they often give severe damages to the mechanical systems, it is important to fully understand the phenomenon to avoid the occurrence by the proper bearing design. This study theoretically and experimentally investigated both cylindrical and conical whirl instabilities, which can be appeared in journal bearings, and their relation was discussed. As the result, the span length of the bearings had a significant effect on the vibration mode. The transitional state in which the cylindrical and conical whirl instabilities alternately appeared was observed.

AB - Hydrodynamic journal bearings induced serious shaft vibrations called oil whirl. Since they often give severe damages to the mechanical systems, it is important to fully understand the phenomenon to avoid the occurrence by the proper bearing design. This study theoretically and experimentally investigated both cylindrical and conical whirl instabilities, which can be appeared in journal bearings, and their relation was discussed. As the result, the span length of the bearings had a significant effect on the vibration mode. The transitional state in which the cylindrical and conical whirl instabilities alternately appeared was observed.

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Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings

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Keywords

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