Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads

Jamali, Hazim U.; Sultan, Hakim S.; Abdullah, Oday I.; Al-Tamimi, Adnan Naji Jameel; Albdeiri, Mahmood Shaker; Ruggiero, Alessandro; AL-Dujaili, Zahraa A.

doi:10.3390/math11030587

Open AccessArticle

Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads

by

Hazim U. Jamali

¹

,

Hakim S. Sultan

²,

Oday I. Abdullah

^3,4,5,*

,

Adnan Naji Jameel Al-Tamimi

⁶,

Mahmood Shaker Albdeiri

⁷,

Alessandro Ruggiero

⁸

and

Zahraa A. AL-Dujaili

¹

Mechanical Engineering Department, College of Engineering, University of Kerbala, Karbala 56001, Iraq

²

College of Engineering, University of Warith Al-Anbiyaa, Karbala 56001, Iraq

³

Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad 10001, Iraq

⁴

Institute of Laser and Systems Technologies (iLAS), Hamburg University of Technology (TUHH), Harburger Schloßstraße 28, 21079 Hamburg, Germany

⁵

Department of Mechanics, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan

⁶

College of Technical Engineering, Al-Farahidi University, Baghdad 10001, Iraq

⁷

Air Conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Hillah 51001, Iraq

⁸

Department of Industrial Engineering, University of Salerno, 84084 Fisciano, Italy

^*

Author to whom correspondence should be addressed.

Mathematics 2023, 11(3), 587; https://doi.org/10.3390/math11030587

Submission received: 14 December 2022 / Revised: 30 December 2022 / Accepted: 19 January 2023 / Published: 22 January 2023

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Abstract

Misalignment is one of the most common challenges that the normal operation of journal bearings faces. This type of problem may be the result of a wide range of reasons, such as bearing wear, shaft deformation, and errors related to the manufacturing and installation process. The main undesirable consequences of the misalignment, such as pressure rise and lubricant film reduction, are concentrated on the bearing edges. Therefore, chamfering the bearing edges reduces such misalignment-related drawbacks. This work presents a novel numerical solution to the problem of finite-length journal bearing considering edge chamfering. This solution involves the determination of the levels of lubricant layer thickness and pressure distribution in addition to the journal trajectory under impact load with the related stability limits. The finite difference method is used in this solution, and the equations of motion are also solved numerically using the Runge–Kutta method. The Results of this novel analysis show that chamfering the bearing edges increases the film thickness and reduces pressure spikes associated with the system operation under the case of 3D misalignment. Furthermore, the chamfered bearing shows a wide stability range under impact loads, where the normal bearing is unstable as the critical speed increases by 26.98%, which has positive consequences on the journal’s trajectory.

Keywords: journal bearings; dynamical systems; mathematical physics; numerical analysis

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MDPI and ACS Style

Jamali, H.U.; Sultan, H.S.; Abdullah, O.I.; Al-Tamimi, A.N.J.; Albdeiri, M.S.; Ruggiero, A.; AL-Dujaili, Z.A. Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads. Mathematics 2023, 11, 587. https://doi.org/10.3390/math11030587

AMA Style

Jamali HU, Sultan HS, Abdullah OI, Al-Tamimi ANJ, Albdeiri MS, Ruggiero A, AL-Dujaili ZA. Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads. Mathematics. 2023; 11(3):587. https://doi.org/10.3390/math11030587

Chicago/Turabian Style

Jamali, Hazim U., Hakim S. Sultan, Oday I. Abdullah, Adnan Naji Jameel Al-Tamimi, Mahmood Shaker Albdeiri, Alessandro Ruggiero, and Zahraa A. AL-Dujaili. 2023. "Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads" Mathematics 11, no. 3: 587. https://doi.org/10.3390/math11030587

APA Style

Jamali, H. U., Sultan, H. S., Abdullah, O. I., Al-Tamimi, A. N. J., Albdeiri, M. S., Ruggiero, A., & AL-Dujaili, Z. A. (2023). Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads. Mathematics, 11(3), 587. https://doi.org/10.3390/math11030587

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Analysis of the Performance of Chamfered Finite-Length Journal Bearings under Dynamic Loads

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