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Coupling analysis of the fatigue life and the TEHL contact behavior of ball screw under the multidirectional load

Jia-Jia Zhao (National Demonstration Center for Experimental Mechanical Engineering Education, Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, China)
Ming-Xing Lin (National Demonstration Center for Experimental Mechanical Engineering Education, Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, China)
Xian-Chun Song (National Demonstration Center for Experimental Mechanical Engineering Education, Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, China)
Nan Wei (College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 2 July 2020

Issue publication date: 13 November 2020

135

Abstract

Purpose

This paper aims to provide thermal elastohydrodynamic lubrication (TEHL) contact model to study all balls’ lubrication performance of the ball screw when the multidirectional load is applied.

Design/methodology/approach

A new TEHL contact model combining the multidirectional load and the roughness surface texture is established to describe fatigue life of the ball screw. Meanwhile, the authors use the Reynolds equation to study the lubrication performance of the ball screw.

Findings

When the multidirectional load is applied, contact load, slide-roll ratio and entrainment velocity of all balls have a periodic shape. The TEHL performance values at the ball-screw contact points including contact stress, shear stress, minimum film thickness and temperature rise are higher than that at the ball-nut contact points. The TEHL performance values increase with the increase of root mean square (RMS) except for the film thickness. In addition, the radial load of the ball screw has a significant effect on the fatigue life.

Originality/value

The results of the studies demonstrate the new TEHL contact model that provides the instructive significance to analyze the fatigue life of the ball screw under the multidirectional load.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0097/

Keywords

Acknowledgements

This work was supported by the National Natural Science Foundation of China (51475267). The authors greatly thank China Best Precision Company for providing experiment platform to support the research.

Citation

Zhao, J.-J., Lin, M.-X., Song, X.-C. and Wei, N. (2020), "Coupling analysis of the fatigue life and the TEHL contact behavior of ball screw under the multidirectional load", Industrial Lubrication and Tribology, Vol. 72 No. 10, pp. 1285-1293. https://doi.org/10.1108/ILT-03-2020-0097

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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