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
PublisherTrans Tech Publications Ltd
Pages688-693
Number of pages6
Volume656-657
ISBN (Print)9783038354956
DOIs
Publication statusPublished - 2015
Externally publishedYes
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)10139826

Other

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

Fingerprint

Bearings (structural)
Journal bearings
Hydrodynamics
Shafts (machine components)
Oils

Keywords

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

ASJC Scopus subject areas

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

Cite this

Miyanaga, N., & Tomioka, J. (2015). Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. In Recent Development in Machining, Materials and Mechanical Technologies (Vol. 656-657, 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. Vol. 656-657 Trans Tech Publications Ltd, 2015. p. 688-693 (Key Engineering Materials; Vol. 656-657).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Miyanaga, N & Tomioka, J 2015, Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. in Recent Development in Machining, Materials and Mechanical Technologies. vol. 656-657, 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
Miyanaga N, Tomioka J. Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. In Recent Development in Machining, Materials and Mechanical Technologies. Vol. 656-657. Trans Tech Publications Ltd. 2015. p. 688-693. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.656-657.688
Miyanaga, Norifumi ; Tomioka, Jun. / Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings. Recent Development in Machining, Materials and Mechanical Technologies. Vol. 656-657 Trans Tech Publications Ltd, 2015. pp. 688-693 (Key Engineering Materials).
@inproceedings{1d2c626ece5c40ccb510c95825d41114,
title = "Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings",
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.",
keywords = "Conical whirl instability, Cylindrical whirl instability, Hydrodynamic bearings, Journal bearing",
author = "Norifumi Miyanaga and Jun Tomioka",
year = "2015",
doi = "10.4028/www.scientific.net/KEM.656-657.688",
language = "English",
isbn = "9783038354956",
volume = "656-657",
series = "Key Engineering Materials",
publisher = "Trans Tech Publications Ltd",
pages = "688--693",
booktitle = "Recent Development in Machining, Materials and Mechanical Technologies",

}

TY - GEN

T1 - Investigations of cylindrical and conical whirl instabilities on hydrodynamic journal bearings

AU - Miyanaga, Norifumi

AU - Tomioka, Jun

PY - 2015

Y1 - 2015

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.

KW - Conical whirl instability

KW - Cylindrical whirl instability

KW - Hydrodynamic bearings

KW - Journal bearing

UR - http://www.scopus.com/inward/record.url?scp=84952362248&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84952362248&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/KEM.656-657.688

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

M3 - Conference contribution

AN - SCOPUS:84952362248

SN - 9783038354956

VL - 656-657

T3 - Key Engineering Materials

SP - 688

EP - 693

BT - Recent Development in Machining, Materials and Mechanical Technologies

PB - Trans Tech Publications Ltd

ER -