Dynamic and stability analysis of crescent geometry-possessing textured journal bearing using nanolubricant
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 2 July 2024
Issue publication date: 2 August 2024
Abstract
Purpose
This study aims to find the dynamic performance parameters of the journal bearing with micro geometries patterning the arc (crescent) shape textures provided in three specific regions of the journal bearing: the full, the second half and the increasing pressure region. The dynamic behavior of textured journal bearings has been analyzed by computing dynamic parameters and linear and non-linear trajectories.
Design/methodology/approach
The lubricant flows between the bearing and journal surface are governed by Reynold’s equation, which has been solved by finite the element method. The dynamic performance parameters such as stiffness, damping, threshold speed, critical mass and whirl frequency ratio are examined under various operating conditions by considering various ranges of eccentricity ratios and texture depths. Linear and non-linear equations of motion have been solved with Ranga–Kutta method to get journal motion trajectories. Also, the impact of adding aluminum oxide and copper oxide nanoparticles to the base lubricant in combination with arc-shaped textures is analyzed to further see any enhancement in the performance parameters.
Findings
The findings demonstrated that direct stiffness and damping parameters increased to their maximum level with six textures in the pressure-increasing region when compared with the untextured surface. Also, nanoparticle additives showed improvements above the highest value attained with no inclusion of additives in the same region or quantity of textures.
Originality/value
Engineers may design bearings with improved stability and overall performance if they understand how texture form impacts dynamic properties.
Keywords
Acknowledgements
Author declarations: The author(s) received no financial support for the research, authorship and/or publication of this article.
Conflict of interest: The authors have no conflicts to disclose.
Data availability: All data gathered regarding this publication is presented.
Citation
Byotra, D. and Sharma, S. (2024), "Dynamic and stability analysis of crescent geometry-possessing textured journal bearing using nanolubricant", Industrial Lubrication and Tribology, Vol. 76 No. 6, pp. 788-803. https://doi.org/10.1108/ILT-03-2024-0089
Publisher
:Emerald Publishing Limited
Copyright © 2024, Emerald Publishing Limited