On the Characteristics of Misaligned Journal Bearings

Jang, Jinho; Khonsari, M. M.

doi:10.3390/lubricants3010027

Cited by 75 publications

(38 citation statements)

References 110 publications

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“…Misalignment results an increase in the wear rate and vibration levels thereby causing a reduction in the performance and life of a journal bearing. 21,22 Schematic diagram of journal bearings under normal and misaligned operating conditions is depicted in Figure 1. The details of the geometry of a journal bearing presented as shown in Figure 1(a) and (b) shows the hydrodynamic journal bearing in misaligned position, where the journal of the bearing has declined along the axial direction due to misalignment.…”

Section: Tribological Parameters To Assess the Performance Of Journalmentioning

confidence: 99%

Applications of microwave heat treatment process to enhance the surface properties of bronze and steel materials used in journal bearing

Perumalla

Amarnath

Aravindan

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Journal bearings are important conformal sliding contact machine elements widely used in industrial applications to support cylindrical shafts subjected to radial loads. Wear in journal bearings propagate due to increase in fatigue load cycles, lubricant degradation, misalignment, etc. Hence, it is important to minimize the occurrence of wear in journal bearings by improving their mechanical properties. Microwave heat treatment process is one of the recent developments emerged to improve the surface properties of materials in which energy is directly delivered to the material surface through molecular interaction with the electromagnetic field. In the present work, microwave heat treatment process was used to improve the performance of journal and bearing materials. Further, the microwave-treated journal and bearing specimens were used to conduct performance evaluation experiments under hydrodynamic lubrication regime operating condition. Results highlighted the importance of microwave treatment to reduce wear in both journal and bearing components. A significant reduction in friction coefficient and specific wear rate values were obtained, which resulted in a considerable improvement in the operating performance of the journal bearing system with respect to the increase in fatigue load cycles.

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Section: Tribological Parameters To Assess the Performance Of Journalmentioning

confidence: 99%

Applications of microwave heat treatment process to enhance the surface properties of bronze and steel materials used in journal bearing

Perumalla

Amarnath

Aravindan

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The use of additional oil in the bearings decreases the friction coefficient, especially at high velocities and pressures. 39,40 Kasai et al 38 enhanced the bearing performance increasing the lubricant pressure inside the bearing. In addition, it has been observed that the friction coefficient decreases using additional additives in lubricants.…”

Section: Introductionmentioning

confidence: 99%

Friction coefficient and performance evaluation of plain journal bearing using SAE 5W-30 engine oil

Chowdhury

Mia

Kchaou

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Friction is a crucial parameter in tribological applications such as power transmission, crankshafts, gears, cams, bearings, and other rotating machine parts or components. Due to the relative motion of the shaft and bearing, friction needs to be analyzed according to all lubrication states of the journal bearing. The friction coefficient was significantly reduced using piezo-viscous SAE 5W-30 engine oil in this study. An adequate lubricant pressure is obtained using this approach to produce a suitable oil film thickness. Minimal variation in lubricant temperature was obtained which prescribes the sustainability of the lubricant. The bearing performance was observed through computational fluid dynamics analysis under different viscosities. The SAE 5W-30 lubricant-containing 0.052693 Pa s viscosity minimized bearing deformation and stress formation at 500, 750, and 1000 r/min. A new bearing material as gun-metal having good bearing properties and good resistance to corrosion has been proposed in this study.

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“…One of the most common causes of wear in the bearing is misalignment between the shaft and the outer ring. The wear effect of misalignment occurs when [1]: asymmetric load is applied; the shaft or the outer ring are distorted; defaults of clearance appears after manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of a Bio-inspired Bearing for off-center Loads

2020

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Misalignment is one of the most common causes of wear in bush bearings. Design improvements have been proposed by research studies for years. Unfortunately, it did not efficiently reduce the phenomenon. Classic geometrical designs sometimes reach their limits. For this reason, a bio-inspired design is proposed to solve the impediment. In this article, a bio-inspired bearing suited to misalignment was tested and compared to a classical bush bearing. The contact pressures of both bearings were compared with static finite element simulations for off-center load. Due to the complex shape of the involved contact, the performances of both bearings were also studied over time. Their wear behaviors were predicted with a numerical method. The methodologies emplaced to simulate the wear are described in this paper. Particularly, the wear coefficient determination obtained by experimental testing is detailed. The results for the classical bearing are in accordance with the literature. The pressure value, the contact zone and the wear depth are compared and discussed. Although the pressure is not uniformly distributed over the bio-inspired bearing, the simulations show a deeper wear on the classical bush bearing than on the bio-inspired bearing. Therefore, the superiority of this bearing is proved.

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On the Characteristics of Misaligned Journal Bearings

Cited by 75 publications

References 110 publications

Applications of microwave heat treatment process to enhance the surface properties of bronze and steel materials used in journal bearing

Applications of microwave heat treatment process to enhance the surface properties of bronze and steel materials used in journal bearing

Friction coefficient and performance evaluation of plain journal bearing using SAE 5W-30 engine oil

Wear Behavior of a Bio-inspired Bearing for off-center Loads

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