Multilobe floating ring bearings for automotive turbochargers

Rob Eling, Ron van Ostayen, Daniel Rixen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

Floating ring bearings are commonly applied in automotive turbocharger machinery because they are inexpensive and are able to reduce unbalance-induced vibrations. This type of bearings, however, can become a source of noise due to oil whirl-induced sub-synchronous vibrations. This study examined whether the concept of a floating ring bearing with a lobed clearance might be a solution to diminish oil whirl induced vibrations. A numerical model is developed to evaluate the dynamic behavior of the coupled rotor-bearing system. The resulting run-up simulations have been validated with experimental results of turbocharger run-up measurements. The results of the plain floating ring design and the multilobe floating ring design are compared, showing that the multilobe floating ring bearing design is superior in suppressing both synchronous and sub-synchronous vibrations at the cost of a slight increase in friction losses. Hence, multilobe floating ring bearings are an attractive alternative to plain floating ring bearings for automotive turbocharger applications.

Original languageEnglish
Title of host publicationProceedings of the 9th IFToMM International Conference on Rotor Dynamics
EditorsPaolo Pennacchi
PublisherKluwer Academic Publishers
Pages821-833
Number of pages13
ISBN (Electronic)9783319065892
DOIs
StatePublished - 2015
Event9th IFToMM International Conference on Rotor Dynamics, 2014 - Milan, Italy
Duration: 22 Sep 201425 Sep 2014

Publication series

NameMechanisms and Machine Science
Volume21
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

Conference

Conference9th IFToMM International Conference on Rotor Dynamics, 2014
Country/TerritoryItaly
CityMilan
Period22/09/1425/09/14

Keywords

  • Floating ring bearing
  • Multilobe bearing
  • Sub-synchronous noise
  • Turbocharger NVH
  • Whirling

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