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 (GT) 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. It is found that the friction reducing effect induced by texturing is influenced by the distribution of the texturing zones. In particular, the hydrodynamic friction can be reduced when the eccentricity ratio is changed from high to low. Moreover, it appears that the shear-thinning effect of lubricant cannot be neglected in the transient analysis of journal bearing system.
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September 2017
Research-Article
Transient Analysis of the Textured Journal Bearing Operating With the Piezoviscous and Shear-Thinning Fluids
Chunxing Gu,
Chunxing Gu
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: chunxinggu@hotmail.com
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: chunxinggu@hotmail.com
Search for other works by this author on:
Xianghui Meng,
Xianghui Meng
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: xhmeng@sjtu.edu.cn
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: xhmeng@sjtu.edu.cn
Search for other works by this author on:
Di Zhang,
Di Zhang
School of Mechanical Electronic Technology,
Shanghai JianQiao University,
Shanghai 201306, China
Shanghai JianQiao University,
Shanghai 201306, China
Search for other works by this author on:
Youbai Xie
Youbai Xie
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
Shanghai Jiaotong University,
Shanghai 200240, China
Search for other works by this author on:
Chunxing Gu
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: chunxinggu@hotmail.com
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: chunxinggu@hotmail.com
Xianghui Meng
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: xhmeng@sjtu.edu.cn
Shanghai Jiaotong University,
Shanghai 200240, China
e-mail: xhmeng@sjtu.edu.cn
Di Zhang
School of Mechanical Electronic Technology,
Shanghai JianQiao University,
Shanghai 201306, China
Shanghai JianQiao University,
Shanghai 201306, China
Youbai Xie
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200240, China
Shanghai Jiaotong University,
Shanghai 200240, China
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received August 19, 2016; final manuscript received January 12, 2017; published online May 26, 2017. Editor: Michael Khonsari.
J. Tribol. Sep 2017, 139(5): 051708 (20 pages)
Published Online: May 26, 2017
Article history
Received:
August 19, 2016
Revised:
January 12, 2017
Citation
Gu, C., Meng, X., Zhang, D., and Xie, Y. (May 26, 2017). "Transient Analysis of the Textured Journal Bearing Operating With the Piezoviscous and Shear-Thinning Fluids." ASME. J. Tribol. September 2017; 139(5): 051708. https://doi.org/10.1115/1.4035812
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