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Research Article | Open Access

Stochastic uncertain lubrication in gear transmission subjected to tribodynamic loading

Zhou CHEN1,2( ), Haiming SHA1,2, Sheng LI3, Zheming TONG1,2, Shuiguang TONG1,2
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, USA
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Abstract

A stochastic uncertain tribodynamic model is established for a spur gear pair for the first time. The stochastic uncertainty of pinion rotation speed propagated to lubrication performance is investigated. The probability density function of the minimum lubricant film thickness hmin evolves over time periodically at interval of an engagement process. Correspondence between abrupt increase in meshing force and amplification of hmin uncertainty is found. Robust and reliable lubrication performance can be achieved by suppressing the hmin uncertainty and decreasing the lubrication failure probability. This can be done by increasing lubricant viscosity, and decreasing input torque and uncertainty level of input rotation speed. This work lays a solid foundation for robust and reliability based optimization for tribodynamic gear system.

Keywords

elastohydrodynamic lubrication (EHL)gearsstochastic uncertaintytribodynamics

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Friction
Volume 12 Issue 8,
August 2024
Pages 1741-1756
DOI: 10.1007/s40544-023-0843-6
Cite this article:
CHEN Z, SHA H, LI S, et al. Stochastic uncertain lubrication in gear transmission subjected to tribodynamic loading. Friction, 2024, 12(8): 1741-1756. https://doi.org/10.1007/s40544-023-0843-6

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Received: 18 May 2023
Revised: 07 September 2023
Accepted: 05 November 2023
Published: 03 April 2024
© The author(s) 2023.

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