Misalignment Effects In 180° Partial Journal Bearings

Stokley, J.R.; Donaldson, R. R.

doi:10.1080/05698196908972265

Cited by 22 publications

(9 citation statements)

References 3 publications

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“…Researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] observed the deviations in the theoretical and experimental data of the static performance of journal bearing. Practical changes in the lubrication were proposed by researchers to improve the performance of journal bearings.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier numerous theoretical and experimental studies have been reported in the literature concerning the static and dynamic performance of partial arc journal bearings systems. Steady-state performance of Newtonian lubricated partial journal bearing (60°, 120°, and 180°) in terms of bearing load, friction coefficient, side leakage, and pressure was discussed by Stokley and Donaldson, 1 Balupari, 2 and Allaire 3 for different values of eccentricity ratio and aspect ratio. Their results show that higher arc angle produces higher load capacity.…”

Section: Introductionmentioning

confidence: 99%

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Micropolar lubricant effects on the performance of partial journal bearings

Sharma

Lambah

Mittal

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Present work deals with the computation of static performance of partial journal bearing, operated with micropolar lubricant. The non-dimensional Reynolds equation governs the lubricant flow in clearance space and finite element method is used to solve it. Static characteristics including bearing load capacity, attitude angle, friction force, friction factor, and side flow are presented. Input parameters are chosen such as partial angles 120° and 180° and a width-diameter ratio (1.0), for a range of micropolar fluid parameters. The numerically simulated results show that the bearing geometry and lubricant micropolar parameters on higher side, provide an improved static performance of partial journal bearing system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Micropolar lubricant effects on the performance of partial journal bearings

Sharma

Lambah

Mittal

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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show abstract

“…Several numerical methods have been proposed to solve the Reynolds equation for misaligned bearing analysis, generally we use the finite difference method (FDM) [5][6][7][8], we can also find the finite element method (FEM) in some studies [9][10][11], these methods are known to be accurate but with a very high computational cost and this is not really useful for dealing with certain problems such as optimization problems where multiple solutions are required. In the last decades, group of method called reduced-order models(ROM) was proposed to resolve problems of fluid mechanics , the most popular of this method is an aposteriori methods named the proper orthogonal decomposition (POD) which was used in [12][13][14][15][16], this category of method often require some snapshots of the flow, which mat takes significant computation time.…”

Section: Introductionmentioning

confidence: 99%

A reduced-order method with PGD for the analysis of misaligned journal bearing

et al. 2021

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In recent years, machine component design has been a major concern for researchers. Emphasis has been placed especially on the analysis of bearing systems in order to avoid detrimental contact. The shaft misalignment is one of the most problems that affects directly the operating conditions of these components. In this context, the present study proposes a reduced-order method "Proper Generalized Decomposition" (PGD) using the separation technique through the alternating direction strategy to solve the modified Reynolds equation, taking into account the presence of misalignment in the shafting system. The solution shows the representation of two types of misalignment geometry, especially axial and twisting. A comparison of the results between the proposed approach and the classical method, through several benchmark examples, made it possible to highlight that the new scheme is more efficient, converges quickly and provides accurate solutions, with a very low CPU time expenditure.

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“…12,13 also carried out two successive experiments to determine the misalignment effects—one on the hydrodynamic film pressure and the other one on the couple generated by the misalignment. Stokely and Donaldson 14 presented a theoretical analysis of misalignment due to shaft/journal elastic deflection under a load for a 180° partial journal bearing and the numerical results of the solution were presented in the form of Raimodi and Boyd diagrams. Bouyer and Fillon 15 attempted an experiment to find the misalignment effect on the hydrodynamic porous journal bearing and the outcome data showed not only misalignment shifted the bearing pressure in either side of bearings, but also reduced the bearing pressure by about 18%.…”

Section: Introductionmentioning

confidence: 99%

Analysis of misaligned hydrodynamic porous journal bearings in the steady-state condition with micropolar lubricant

Baidya¹,

Das

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Impregnated porous bearings are used in different machines and other applications. In this work, an analytical work is investigated to evaluate the steady-state characteristics of such self-lubricated porous journal bearings in micropolar lubrication with misalignment. Bi-axial misalignments are considered, namely axial (along the vertical direction) and twisting (along the horizontal direction). Reynolds equation is modified to fit bearing misalignment, by incorporating the effects of micropolarity of the lubricant and porosity of the bush. Darcy’s equation that considers porosity and the misalignment Reynolds’s equation applicable for film region are numerically solved using finite difference method applying successive over-relaxation scheme employing appropriate boundary conditions to obtain the dimensionless fluid film pressure at steady state, which is used to get the steady-state characteristics e.g. load parameter, moment of misalignment, frictional force, and friction parameter.

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Misalignment Effects In 180° Partial Journal Bearings

Cited by 22 publications

References 3 publications

Micropolar lubricant effects on the performance of partial journal bearings

Micropolar lubricant effects on the performance of partial journal bearings

A reduced-order method with PGD for the analysis of misaligned journal bearing

Analysis of misaligned hydrodynamic porous journal bearings in the steady-state condition with micropolar lubricant

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