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18 Results Found

  • Article
  • Open Access
11 Citations
2,833 Views
20 Pages

A flexible structure is applied to improve the lubrication performance of a misaligned journal bearing. The journal bearing is a representative sliding bearing, and there is damage due to metal-to-metal contact as a result of misalignment. Since misa...

  • Article
  • Open Access
7 Citations
4,952 Views
19 Pages

The pressure distribution of a misaligned elastomeric journal bearing is crucial for analyzing the uneven excessive wearing of the propulsion shaft bearing. However, analysis of the misaligned bearing is usually mainly based on the finite element met...

  • Article
  • Open Access
4 Citations
1,848 Views
21 Pages

21 October 2022

Rough elliptic bore misaligned journal bearing performance involves many geometric and operational parameters, which directly or indirectly affect the thermohydrodynamic performance output. Improper design and manufacturing of journal bearings lead t...

  • Review
  • Open Access
91 Citations
17,671 Views
27 Pages

On the Characteristics of Misaligned Journal Bearings

  • Joon Young Jang and
  • Michael M. Khonsari

16 March 2015

Journal bearing misalignment arise generally from the shaft deformation under load, deflection of the shaft, manufacturing and assembly errors, improper installation, and asymmetric loading. During operations, misalignment has a considerable effect...

  • Article
  • Open Access
8 Citations
3,507 Views
17 Pages

Minimizing Misalignment Effects in Finite Length Journal Bearings

  • Hazim U. Jamali,
  • Hakim S. Sultan,
  • Adolfo Senatore,
  • Zahraa A. Al-Dujaili,
  • Muhsin Jaber Jweeg,
  • Azher M. Abed and
  • Oday I. Abdullah

27 September 2022

This paper focuses on a method to reduce the detrimental effects that occur due to the misalignment in journal bearings by approaching it with the more complete model of a finite length bearing. Such a drawback is quite common in industrial applicati...

  • Article
  • Open Access
5 Citations
2,682 Views
22 Pages

25 November 2023

Bearings might be damaged due to shock loads caused by disturbances, in addition to static loads. In this study, a flexible structure was applied to enhance the lubrication characteristics of misaligned journal bearings subjected to impact loads. Whe...

  • Article
  • Open Access
12 Citations
2,792 Views
25 Pages

28 November 2022

Marine water-lubricated polymer bearings support the propeller shaft that stretches out of the ship. The bending deformation of propeller shaft often leads to journal misalignment, significantly impacting the bearing performance. In this paper, a mix...

  • Article
  • Open Access
26 Citations
3,760 Views
20 Pages

16 October 2022

The shaft misalignment under mixed lubrication is an important factor affecting the running performance of the bearing, which can occur under heavy load and unsatisfactory assembly. This paper presents a misaligned journal mixed lubrication model cou...

  • Article
  • Open Access
526 Views
23 Pages

29 October 2025

Previous studies on improving journal bearing performance have predominantly overlooked the combined effects of the surface textures, circumferential oil grooves, eccentricity ratio, and misalignment. To address this gap, this study employed an adjoi...

  • Article
  • Open Access
2 Citations
1,865 Views
11 Pages

28 December 2023

Disturbances caused as a result of the misalignment and axial motion of the journal affect the characteristics of the rotor-bearing system. This paper aims to propose an algorithm for the theoretical analysis of a rotor-bearing system that considers...

  • Article
  • Open Access
36 Citations
7,871 Views
19 Pages

The application of sliding planet gear bearings in wind turbine gearboxes has become more common in recent years. Assuming practically applied helix angles, the gear mesh of the planet stage causes high force and moment loads for these bearings invol...

  • Article
  • Open Access
3 Citations
2,498 Views
24 Pages

An Evaluation of the Design Parameters of a Variable Bearing Profile Considering Journal Perturbation in Rotor–Bearing Systems

  • Adawiya Ali Hamzah,
  • Abbas Fadhil Abbas,
  • M. N. Mohammed,
  • H. S. S. Aljibori,
  • Hazim U. Jamali and
  • Oday I. Abdullah

7 October 2023

A variety of bearing profile designs can be used to improve the performance of a rotor–bearing system in severe conditions, such as operating with a shaft misalignment. Misalignments usually occur due to a deformation of the journal, bearing we...

  • Article
  • Open Access
10 Citations
2,560 Views
21 Pages

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

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

22 January 2023

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...

  • Article
  • Open Access
4 Citations
2,449 Views
25 Pages

Analysis of Modified Finite Length Journal Bearing under Position Perturbation

  • Hazim U. Jamali,
  • Hakim S. Sultan,
  • Oday I. Abdullah,
  • Adnan Naji Jameel Al-Tamimi,
  • Murtadha M. Al-Masoudy,
  • Alessandro Ruggiero and
  • Maria Cristina Valigi

The performance of journal bearings is significantly affected by the presence of misalignment, which is usually an accompanying problem for this type of bearing. This includes exceeding the design limits for the maximum pressure and the minimum film...

  • Article
  • Open Access
8 Citations
2,749 Views
28 Pages

Effect of Chamfer Form and Parameters on the Characteristics of Finite Length Journal Bearing under Impact Load

  • Hazim U. Jamali,
  • Hakim S. Sultan,
  • Oday I. Abdullah,
  • Adnan Naji Jameel Al-Tamimi,
  • Luay Hashem Abbud,
  • Alessandro Ruggiero and
  • Zahraa A. Al-Dujaili

10 February 2023

Journal bearings in typical applications are subjected to misalignment due to several causes, such as shaft deformation under load and errors related to the installation and manufacturing processes. Misalignment has well-known severe negative consequ...

  • Article
  • Open Access
17 Citations
6,304 Views
15 Pages

Tilting pad journal bearings are usually employed in turbomachines for their stable behavior at high rotational speeds. Devoted test rigs have been realized to validate the predictions of theoretical models. However, the design of new high-performanc...

  • Article
  • Open Access
14 Citations
9,130 Views
15 Pages

10 September 2018

Jacking-oil pockets are applied in many journals and thrust bearing applications in order to provide a hydrostatic oil film force that ensures a wear free run-up following a successful lift-off procedure. However, all components of the jacking-oil sy...

  • Article
  • Open Access
7 Citations
5,433 Views
25 Pages

3 January 2020

There are many cases when in large power equipment (such as a turbine or compressor) asymmetrically loading on bearings due to thermal deformations, production inaccuracies, or simple deflection of the shaft occurs. This asymmetrically loading means...