The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness Part 2, Recessed Fitted Bearing
International Journal of Mechanical Engineering and Applications
Volume 6, Issue 3, June 2018, Pages: 73-90
Received: Jul. 12, 2018;
Accepted: Aug. 14, 2018;
Published: Sep. 11, 2018
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Ahmad Waguih Yacout Elescandarany, Mechanical Department, Faculty of Engineering, Alexandria University, Alex, Egypt
The study deals with the fluid viscosity variation, the centripetal inertia and the bearing surface roughness affecting the externally pressurized thrust spherical bearing performance where the partial differential equation of the temperature gradient previously derived from the fluid governing equations, is integrated and applied to this type of bearings to calculate and predict temperature distribution along the fluid film. In this part of the research, the recessed fitted type of bearings has been studied deriving mathematical expressions that not only cover this configuration but also cover the fitted type of this bearing with its different configurations and showing also the recess effect on the bearing performance. The results showed the effect of the viscosity variation on the pressure, the load caring capacity, the fluid flow rate, the frictional torque, the friction factor, the power factor, the stiffness factor and the central pressure ratio as well as the effect of the speed parameter and the eccentricity on the temperature rise. Applying these derived mathematical expressions, which could be considered as a general solution for the fitted type, an optimum design for the fitted type with its different configurations (with and without recess; hemispherical and partial hemispherical seats) has been performed. Using the same bearing dimensions, the application of these equations proved the excellence of the aforementioned optimum design of this bearing in our previous papers where the temperature of the outlet flow was less than 14 degrees centigrade over its inlet temperature.
Ahmad Waguih Yacout Elescandarany,
The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness Part 2, Recessed Fitted Bearing, International Journal of Mechanical Engineering and Applications.
Vol. 6, No. 3,
2018, pp. 73-90.
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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