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

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

Institute of Electrical and Control Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-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 language	English
Title of host publication	Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
Pages	681-688
Number of pages	8
Edition	PART A
State	Published - 1 Dec 2004
Event	2004 ASME/STLE International Joint Tribology Conference - Long Beach, CA, United States Duration: 24 Oct 2004 → 27 Oct 2004

Publication series

Name	Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
Number	PART A

Conference

Conference	2004 ASME/STLE International Joint Tribology Conference
Country	United States
City	Long Beach, CA
Period	24/10/04 → 27/10/04

Keywords

Ferrofluid
Finite difference method
Grooves
Journal bearing

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Huang, J. S., Chao, C-P., & Lui, P. W. (2004). Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis. In Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004 (PART A ed., pp. 681-688). (Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004; No. PART A).

Huang, Jeng Sheng ; Chao, Chang-Po ; Lui, Po Wen. / Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis. Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004. PART A. ed. 2004. pp. 681-688 (Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004; PART A).

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

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.",

keywords = "Ferrofluid, Finite difference method, Grooves, Journal bearing",

author = "Huang, {Jeng Sheng} and Chang-Po Chao and Lui, {Po Wen}",

year = "2004",

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series = "Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004",

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Huang, JS, Chao, C-P & Lui, PW 2004, Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis. in Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004. PART A edn, Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004, no. PART A, pp. 681-688, 2004 ASME/STLE International Joint Tribology Conference, Long Beach, CA, United States, 24/10/04.

Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis. / Huang, Jeng Sheng; Chao, Chang-Po; Lui, Po Wen.

Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004. PART A. ed. 2004. p. 681-688 (Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004; No. PART A).

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

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AU - Huang, Jeng Sheng

AU - Chao, Chang-Po

AU - Lui, Po Wen

PY - 2004/12/1

Y1 - 2004/12/1

N2 - 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.

AB - 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.

KW - Ferrofluid

KW - Finite difference method

KW - Grooves

KW - Journal bearing

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BT - Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004

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Huang JS, Chao C-P, Lui PW. Calculating rotordynamic coefficients of a ferrofluid-lubricated and herringbone-grooved journal bearing via finite difference analysis. In Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004. PART A ed. 2004. p. 681-688. (Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004; PART A).