Effect of journal cylindricity error with saddle or drum distribution on the performance of hydrodynamic journal bearing systems

Li, Bing; Zhou, Dejian; Ogrodnik, Peter; Xu, Wubin

Abstract

The present study investigates the effect of cylindricity error on the performance of hydrodynamic journal bearing systems. Two types of cylindricity errors of the journal, namely the drum shape distribution cylindricity error (DCE) and the saddle shape distribution cylindricity error (SCE), are considered. The Legendre–Fourier model is used to characterize the profile of each journal. Based on the nonlinear analysis method, the dynamic characteristics and stability of hydrodynamic journal bearing systems are analyzed. The results indicate that cylindricity error affects the system stability, and the effect is related to the type and level of the error. DCE used with a certain range of operating speed and load is not harmful and is even beneficial to the stability of hydrodynamic journal bearing systems; conversely, SCE decreases the system stability. When the Sommerfeld number is between 0.02 and 0.05, cylindricity errors have a minimal effect on the system stability. Additionally, the results indicate that the effect of cylindricity error on the bearing system is more significant than that of roundness error.

Citation

Li, B., Zhou, D., Ogrodnik, P., & Xu, W. (2020). Effect of journal cylindricity error with saddle or drum distribution on the performance of hydrodynamic journal bearing systems. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 234(7), 1092-1105. https://doi.org/10.1177/1350650119876221

• Journal Article Type: Article
• Acceptance Date: Aug 20, 2019
• Online Publication Date: Sep 14, 2019
• Publication Date: 2020-07
• Deposit Date: Jun 14, 2023
• Journal: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
• Print ISSN: 1350-6501
• Electronic ISSN: 2041-305X
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 234
• Issue: 7
• Pages: 1092-1105
• DOI: https://doi.org/10.1177/1350650119876221
• Keywords: Surfaces, Coatings and Films; Surfaces and Interfaces; Mechanical Engineering