Technical Brief

Effect of Thermal Properties of a Coated Elastohydrodynamic Lubrication Line Contact Under Various Slide-to-Roll Ratios

[+] Author and Article Information
Huaiju Liu

State Key Laboratory of Mechanical Transmissions,
Chongqing University,
Shazhengjie 174,
Chongqing 400044, China
e-mail: huaijuliu@cqu.edu.cn

Caichao Zhu

State Key Laboratory of Mechanical Transmissions,
Chongqing University,
Shazhengjie 174,
Chongqing 400044, China
e-mail: cczhu@cqu.edu.cn

Zonglin Gu

State Key Laboratory of Mechanical Transmissions,
Chongqing University,
Shazhengjie 174,
Chongqing 400044, China
e-mail: 1148752323@qq.com

Zhanjiang Wang

Department of Mechanical Engineering,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: wangzhanjiang001@gmail.com

Jinyuan Tang

State Key Laboratory of High Performance
Complex Manufacturing,
Central South University,
Changsha 410083, Hunan, China
e-mail: jytangcsu@163.com

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received April 28, 2016; final manuscript received January 24, 2017; published online April 4, 2017. Assoc. Editor: Ali Khounsary.

J. Heat Transfer 139(7), 074505 (Apr 04, 2017) (5 pages) Paper No: HT-16-1235; doi: 10.1115/1.4036078 History: Received April 28, 2016; Revised January 24, 2017

A numerical thermal elastohydrodynamic lubrication (EHL) model is developed for coated line contacts by considering both the mechanical properties and the thermal properties of the coating and the substrate. The temperature fields within the oil film and within the solids are solved by deriving the energy equations for the solids and the oil film. Heat continuity conditions are satisfied at the interfaces between the solids and the oil film, and the coating/substrate interfaces. Effects of the slide-to-roll ratio (SR), the thermal conductivities of the coating bodies, and the oil film on temperature fields are studied.

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Grahic Jump Location
Fig. 1

The lubricated contact between two coated rollers

Grahic Jump Location
Fig. 2

Effect of slide-to-roll ratio on temperature profile at five characteristic layers

Grahic Jump Location
Fig. 3

The temperature distribution under three slide-to-roll ratio cases

Grahic Jump Location
Fig. 4

The temperature distribution under three slide-to-roll ratio cases with ub>ua

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Fig. 5

Temperature distribution under three thermal conductivities of the coating

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Fig. 6

Effect of the thermal conductivity of the fluid on temperature distribution



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