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A general performance calculation model of journal bearing using unified coordinate system

Aibin Zhu (Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xian JiaoTong University, Xi’an, China)
Hongling Wu (School of Mechanical Engineering, Xian JiaoTong University, Xi’an, China)
Yulei Yang (Key Laboratory of Tribology, Tsinghua University, Beijing, China)
Shengli He (Xi’an JiaoTong University, Xi’an, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 8 May 2018

Abstract

Purpose

Because of the various geometric descriptions of different bearing types, performance calculation of journal bearing is complicated, and is difficult in traditional model. This paper aims to simplify the calculation of the journal bearing performance, and to reduce the workload.

Design/methodology/approach

On the basis of previous research, a general performance calculation model of journal bearing is proposed in this paper. Eccentricity ratio and attitude angle of axis to each pad are calculated by coordinates of spindle center and each pad center by establishing the unified coordinate system. The surface deformation of journal bearing is taken into consideration, and a correction value is added to the dimensionless oil film thickness.

Findings

The performance calculation results of various fix-pad and tilting-pad journal bearings match the results of the existing references very well, revealing the validity of the model. The general model can greatly reduce programming workload, and increase adaptability to different bearings.

Originality/value

Geometric descriptions of both fix-pad and tilting-pad journal bearings are unified in this model, which can be applied to both standard and non-standard journal bearings with different preload ratios. In addition, due to the unification of different bearings types, this model is more conducive to performance comparison among different bearing types, and promotes the development of new structural forms for journal bearings.

Keywords

Acknowledgements

The authors would like to acknowledge the financial support of National Natural Science Foundation of China (NSFC, No: 51275395).

Citation

Zhu, A., Wu, H., Yang, Y. and He, S. (2018), "A general performance calculation model of journal bearing using unified coordinate system", Industrial Lubrication and Tribology, Vol. 70 No. 4, pp. 782-788. https://doi.org/10.1108/ILT-05-2017-0144

Publisher

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Emerald Publishing Limited

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