Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings

Norifumi Miyanaga, Jun Tomioka

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationRecent Development in Machining, Materials and Mechanical Technologies
EditorsJyh-Chen Chen, Usuki Hiroshi, Sheng-Wei Lee, Yiin-Kuen Fuh
PublisherTrans Tech Publications Ltd
Pages688-693
Number of pages6
ISBN (Print)9783038354956
DOIs
Publication statusPublished - 2015 Jan 1
EventInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014 - Taipei City, Taiwan, Province of China
Duration: 2014 Aug 312014 Sep 5

Publication series

NameKey Engineering Materials
Volume656-657
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014
CountryTaiwan, Province of China
CityTaipei City
Period14/8/3114/9/5

Keywords

  • Conical whirl instability
  • Cylindrical whirl instability
  • Hydrodynamic bearings
  • Journal bearing

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • 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