Stabilization of journal bearing using two-layered film lubrication

Rao, T.V.V.L.N. (2012) Stabilization of journal bearing using two-layered film lubrication. Journal of Tribology, 134 (1). ISSN 07424787

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Abstract

The purpose of this paper is to present the linearized stability analysis of two-layered fluid film in the journal bearing. In this work, a modified classical Reynolds equation is derived under dynamic conditions consisting of two layers of fluid film described by Newtonian viscosities. The magnitude of lubricant layer's film thickness and viscosities are taken into consideration. The Reynolds boundary conditions are used in the analysis of classical one-dimensional journal bearing to predict the stiffness and damping coefficients, threshold speed and critical whirl frequency ratio. The coefficients of load capacity, threshold speed, and critical whirl frequency ratio (C w, C �, C Ω) for two-layered film with reference to homogeneous film are computed as a function of the two parameters: (i) higher to lower dynamic viscosity ratio of two-layered fluid film (β), and (ii) thickness ratio of fluid layer attached to journal and bearing (γ). Higher threshold speed is obtained for thick high viscosity fluid film attached to the bearing surface and a thin low viscosity fluid film attached to the journal surface. © 2012 American Society of Mechanical Engineers.

Item Type: Article
Additional Information: cited By 2
Uncontrolled Keywords: Bearing surfaces; Damping coefficients; Dynamic condition; Dynamic viscosities; Film lubrication; Fluid films; Fluid layer; High viscosity fluids; Homogeneous films; Linearized stability analysis; Load capacity; Low viscosity fluids; Lubricant layers; Newtonian viscosity; Reynolds; Thickness ratio; Threshold speed; Two layers; Two parameter; two-layered fluid film; Whirl frequency ratios, Damping; Reynolds equation; Stiffness, Journal bearings
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 15:51
Last Modified: 09 Nov 2023 15:51
URI: https://khub.utp.edu.my/scholars/id/eprint/3052

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