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Effect of micro-textures on lubrication characteristics of spur gears under 3D line-contact EHL model

Jiang Zhao (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China and National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Zhengminqing Li (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China and National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Hong Zhang (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China and National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Rupeng Zhu (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China and National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 27 July 2021

Issue publication date: 7 December 2021

430

Abstract

Purpose

The purpose of this paper is to use a combination of numerical simulation and experiment to evaluate the performance of laser surface texturing (LST) in the field of gear lubrication, and to more accurately predict the lubrication characteristics of different surfaces.

Design/methodology/approach

The method used in this paper is developed on the basis of the deterministic solution of the three-dimensional (3D) mixed elasto-hydrodynamic lubrication (EHL) model and the model parameters are corrected by friction test. The film pressure, film thickness and friction coefficient of different micro-textured tooth surfaces are predicted on the basis of accurate 3D mixed EHL models.

Findings

The results demonstrate that the micro-texture structure of the tooth surface can increase the local film thickness and enhance the lubricating performance of the tooth surface without drastically reducing the contact fatigue life. The stress distribution and friction characteristics of the tooth surface can be optimized by adjusting the micro-texture arrangement and the size of the micro-textures.

Originality/value

A new evaluation method using a 3D hybrid EHL model and friction test to predict the lubrication characteristics of LST is proposed, which can effectively improve the processing economy and save time.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2020-0423

Keywords

Acknowledgements

This work was supported by the National Key R&D Program of China (Grant No. 2018YFB2001300), the National Natural Science Foundation of China (Grant No. 51775264) and the National Defense Basic Scientific Research program of China (Grant No. JCKY2019605D003). In addition, the authors declare that there is no conflict of interest regarding the publication of this article. The authors would like to thank the anonymous reviewers for their very valuable comments.

Citation

Zhao, J., Li, Z., Zhang, H. and Zhu, R. (2021), "Effect of micro-textures on lubrication characteristics of spur gears under 3D line-contact EHL model", Industrial Lubrication and Tribology, Vol. 73 No. 9, pp. 1132-1145. https://doi.org/10.1108/ILT-11-2020-0423

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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