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The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Shicheng Yan (Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China; National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, China and College of Mechanical Engineering, Tianjin University of Technology, Tianjin, China)
Yahong Xue (Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, China; National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin, China and College of Mechanical Engineering, Tianjin University of Technology, Tianjin, China)
Liming Wei (Huabei Pharmaceutical Group Ltd., Shijiazhuang, China)
Zhanchao Wang (Tianjin Yingchuang Huizhi Automobile Technology Co. Ltd., Tianjin, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 26 March 2021

Issue publication date: 14 May 2021

239

Abstract

Purpose

This paper aims to elucidate the effects of lubricant groove shape, vertical load, swing angle and grease injection cycle on the friction and wear performances of journal bearings under the grease lubrication condition.

Design/methodology/approach

Three different types of lubricant grooves, namely, numeral eight-shaped, axial straight line-shaped and circular blind hole-shaped, were designed and machined in the bearing bush of journal bearings. The tribological behaviors of these journal bearings were investigated on the self-developed reciprocating swing friction and wear tester. Experimental data including the friction coefficient, the friction temperature, the wear loss and wear time were analyzed in detail. The wear morphologies of friction pairs were observed by scanning electron microscope and confocal laser scanning microscope.

Findings

The load carrying capacity and service life of the journal bearing with circular blind hole-shaped lubricant grooves are not affected. However, the load carrying capacities of journal bearings with numeral eight-shaped and axial straight line-shaped lubricant grooves are declined. The coverage areas of lubricating grease in the bearing bush are associated with the swing angle. The smaller the swing angle is, the more limited the coverage areas of lubricating grease get. Among these journal bearings, the maintenance-free time of journal bearing with circular blind hole-shaped lubricant grooves is the longest because of its large grease storage capacity.

Originality/value

The journal bearing with circular blind hole-shaped lubricant grooves exhibits the excellent antifriction and wear-resistant properties, making it suitable for the application in the low-speed and heavy-load engineering conditions.

Keywords

Acknowledgements

This work was supported by Natural Science Research Project of Tianjin Colleges and Universities and Scientific Research Project of Tianjin Education Commission (2018KJ144).

Citation

Yan, S., Xue, Y., Wei, L. and Wang, Z. (2021), "The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions", Industrial Lubrication and Tribology, Vol. 73 No. 3, pp. 493-499. https://doi.org/10.1108/ILT-12-2020-0443

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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