An Analytical Method for the Determination of Temperature Distribution in Short Journal Bearing Oil Film

Nebojsa Nikolic,Jovan Doric,Zivota Antonic,Dragan Ruzic,Mitar Jocanovic,Stjepan Galambos,Velibor Karanovic

doi:10.3390/sym12040539

Nebojsa Nikolic, Jovan Doric + Show 5 more

Open Access

https://doi.org/10.3390/sym12040539

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Journal: Symmetry	Publication Date: Apr 3, 2020
Citations: 5	License type: CC BY 4.0

Affiliation: University of Novi Sad

Abstract

The aim of this paper is to derive an equation for the temperature distribution in journal bearing oil film, in order to predict the thermal load of a bearing. This is very important for the prevention of critical regimes in a bearing operation. To achieve the goal, a partial differential equation of the temperature field was first derived, starting from the energy equation coupled with the Reynolds equation of hydrodynamic lubrication for a short bearing of symmetric geometry. Then, by solving the equation analytically, the function of temperature distribution in the bearing oil film has been obtained. The solution is applied to the journal bearing, for which the experimental data are available in the references. Finally, the obtained results have been compared to the corresponding experimental values for two operating regimes, and a good level of agreement was achieved.

Highlights

Journal bearings are some of the oldest and most relevant machine elements
In order to validate the mathematical model of temperature distribution in a journal bearing oil film (Equation (41)), the experimental results given in the reference [25] were used
The results of applying this equation to a journal bearing have been compared to the corresponding experimental results of other researchers for the same bearing, showing a small deviation

Summary

Introduction

Journal bearings are some of the oldest and most relevant machine elements. When it comes to the design, the concept of these bearings did not significantly change over the course of history, retaining its original simplicity and functionality. To keep the bearing operation reliable even in such conditions, the materials of the bearings and their lubricants were improved over time. The bearing materials were changed in terms of improving their slip properties and embeddability, and the lubricants were changed in terms of improving their rheological properties. These improvements are the result of the studies of many researchers

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Conclusion