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Technical Briefs

# Influence of Solid Body Temperature on the Thermal EHL Behavior in Circular Contacts

[+] Author and Article Information
Xiaoling Liu, Peiran Yang

School of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, P.R.C.

J. Tribol 130(1), 014501 (Dec 06, 2007) (4 pages) doi:10.1115/1.2806212 History: Received July 03, 2006; Revised August 18, 2007; Published December 06, 2007

## Abstract

In order to investigate the influence of the body temperature of contacting solids on the lubrication performance of machine components, such as gears and roller bearings, a full numerical solution for the thermal elastohydrodynamic lubrication (EHL) problem in circular contacts under steady state has been achieved. The analysis assumed that the body temperature is different from the temperature of the supplied lubricating oil. The effects of the body temperature, the slide-roll ratio, and the velocity parameter have been discussed. Results show that if the entrainment velocity is not very high, the solid body temperature plays a dominant role in the EHL behavior; however, the influence of the body temperature decreases as the entrainment velocity increases.

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Topics: Temperature , Solids

## Figures

Figure 1

Schematic of the boundary temperatures of both solids and the oil film

Figure 2

Distributions of the film thicknesses, pressures, and film temperatures on the plane of Y=0, with the same body temperatures shown in Fig. 2: (a) film thicknesses, (b) pressures, and (c) film temperatures in the layer of Z=0.6. Newtonian fluid, ξ=1.0, Ue=1.0×10−11, G=5000, and W=1.74×10−6.

Figure 3

Profiles of the temperatures on surfaces a (dashed lines) and b (dotted lines) and in the layer of Z=0.6 (solid lines) with different body temperatures and slide-roll ratios. All curves are plotted on the plane of Y=0. Newtonian fluid, Ue=1.0×10−11, G=5000, and W=1.74×10−6.

Figure 4

Distributions of the film thicknesses, pressures, and film temperatures in the layer of Z=0.6 with different body temperatures for Ue=5×10−12, 5×10−11, and 5×10−10, respectively. All curves are plotted on the plane of Y=0. Newtonian fluid, ξ=1.0, G=5000, and W=1.74×10−6.

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