Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis

Jeng Sheng Huang*, Chang-Po Chao, Po Wen Lui

*Corresponding author for this work

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

Abstract

The objective of this study to conduct finite difference analysis for investigating the rotordynamic characteristics of a hydrodynamic journal bearing (HDJB) filled with ferrofluid for lubrication and with herringbone grooves inside. The small-sized journal bearing serves well as the candidate for supporting high-speed rotating spindles of data-storage drives; such as hard disc drives and optical disc derives. The analysis results are expected to serve for distilling design guidelines of these small HDJBs with main goals of reaching higher stiffnesses and simultaneously owns largest stability margin, the mostly-common design goals of small HDJBs. To fulfill the aforementioned goal, the present study starts with building the mass flux equations of the grooved bearing filled with ferrofluid, which is followed by the discretization over the bearing clearance domain and derivation of finite difference equations based on mass flow balance over the clearance domain. Finally, the pressure distribution of fluid film, stiffnesses, damping coefficients, and critical mass are computed. Results show the capability of the ferrofluid to alter or even improve the general dynamic characteristics of a grooved journal bearing.

Original languageEnglish
Title of host publicationProceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
Pages681-688
Number of pages8
EditionPART A
StatePublished - 1 Dec 2004
Event2004 ASME/STLE International Joint Tribology Conference - Long Beach, CA, United States
Duration: 24 Oct 200427 Oct 2004

Publication series

NameProceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
NumberPART A

Conference

Conference2004 ASME/STLE International Joint Tribology Conference
CountryUnited States
CityLong Beach, CA
Period24/10/0427/10/04

Keywords

  • Ferrofluid
  • Finite difference method
  • Grooves
  • Journal bearing

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