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research-article

Transient analysis of the textured journal bearing operating with the piezoviscous and shear-thinning fluids

[+] Author and Article Information
Chunxing Gu

School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
chunxinggu@hotmail.com

Xianghui Meng

School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
xhmeng@sjtu.edu.cn

Di Zhang

School of Mechanical Electronic Technology, Shanghai JianQiao University, Shanghai 201306, China
dizhang@outlook.com

Youbai Xie

School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
star_in_spring@outlook.com

1Corresponding author.

ASME doi:10.1115/1.4035812 History: Received August 19, 2016; Revised January 12, 2017

Abstract

In this paper, a mixed lubrication model is presented to analyze the tribological behavior of the textured journal bearings operating from mixed to hydrodynamic lubrication regimes. In particular, the effects of fluid piezoviscosity and the non-Newtonian fluid behavior are also considered. The presented model solves the hydrodynamic lubrication problem by a mass-conserving formation of the Reynolds equation. Whereas, the metal-metal contact is considered by using the Greenwood and Tripp contact model, which is linked with the hydrodynamic model based on the concept of Johnson's load sharing. As a result, the performance of the textured journal bearing system under different lubrication regimes, including boundary lubrication regime, mixed hydrodynamic lubrication regime and hydrodynamic lubrication regime can be evaluated. Using the journal bearing systems operated under the start-up condition as examples, prediction demonstrates the influences of texture distributions on friction and wear. Moreover, the effect of non-Newtonian lubricants is also performed.

Copyright (c) 2017 by ASME
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