Frictional power loss in journal bearing considering parabolic shape for the bearing edges under misalignment
Jamali H.U. Aljibori H.S.S. Jweeg M.J. Mohammed M.N. Abdullah O.I. Schlattmann J.
September 2024SAGE Publications Inc.
Advances in Mechanical Engineering
2024#16Issue 9
In recent years, there has been a rising demand for minimizing any power loss in industrial applications due to the direct relation to economic as well as climate considerations. This work investigates the parameters that affect the frictional power loss in journal bearings as they are widely used in such applications. The frictional power loss is calculated considering misalignment conditions in the vertical and horizontal planes with the use of a modified bearing shape. Wide ranges of misalignment and bearing shape parameters are considered in the numerical investigation to study the combined effects of misalignment and bearing shape. It has been found that the misalignment significantly increases the frictional power loss at high operating speed levels. The use of a modified bush shape can play an important role in reducing the frictional power loss as well as, it added further advantages in elevating the lubricant film thickness and reducing the pressure levels. Results show that using a modified bearing shape despite the presence of severe misalignment levels reduces the maximum pressure from 20.30 to 17.94 MPa, increasing the minimum film thickness from 2.66 to 8.21 (Formula presented.) and reducing the fictional power loss from 1179.74 to 1094.41 W.
bearing shape , Frictional power loss , misalignment , numerical solution
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Mechanical Engineering Department, College of Engineering, University of Kerbala, Karbala, Iraq
College of Engineering, University of Warith Al-Anbiyaa, Karbala, Iraq
College of Technical Engineering, Al-Farahidi University, Baghdad, Iraq
Mechanical Engineering Department, College of Engineering, Gulf University, Sanad, Bahrain
Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
Department of Mechanics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Institute of Laser and Systems Technologies (iLAS), Hamburg University of Technology (TUHH), Hamburg, Germany
Mechanical Engineering Department
College of Engineering
College of Technical Engineering
Mechanical Engineering Department
Department of Energy Engineering
Department of Mechanics
Institute of Laser and Systems Technologies (iLAS)
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