Theoretical investigations on the performance of an externally adjustable fluid-film bearing including misalignment and turbulence effects

Shenoy, Bhaskar; Pai, Raghuvir

doi:10.1016/j.triboint.2009.03.008

Cited by 41 publications

(31 citation statements)

References 8 publications

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“…The authors claim that the power consumed by friction increased with the increase in DM for the same load capacity. For an adjustable fluid film bearing, the load capacity was hardly affected due to misalignment apart from a rise in load capacity immediately prior to shaft contact as found by Shenoy et al 10 in their investigation. Pinkus et al 11 in their theoretical study of misaligned grooved journal bearing recommend that long L/D ratios are undesirable for misaligned journal bearings.…”

Section: Introductionmentioning

confidence: 50%

“…Turbulent flow in a hydrodynamic bearing can be modeled by introducing the ''turbulence coefficients'' into the Reynolds equation. Pressure distribution in the clearance space between the journal and bearing is governed by the Reynolds equation, as given in Shenoy et al 10…”

Section: Theorymentioning

confidence: 99%

“…The film thickness equation as given in Shenoy et al, 10 for adjustable journal bearing is modified and incorporated in the Reynolds equation to calculate the misaligned nondimensional pressure.…”

Section: Implementation Of Misalignmentmentioning

confidence: 99%

See 2 more Smart Citations

Static characteristics of misaligned multiple axial groove water-lubricated bearing in the turbulent regime

Mallya

Shenoy

Pai

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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The static characteristics of misaligned three-axial water-lubricated journal bearing in the turbulent regime are analyzed for groove angles 36° and 18°. Ng and Pan’s turbulence model is applied to study the turbulence effects in the journal bearing. The static parameters such as load-carrying capacity, friction coefficient, and side leakage are found for different degree of misalignment (DM). The change in flow regime of the lubricant from laminar to turbulent and the increase in misalignment, improved the load capacity of the bearing. For lightly loaded bearings, the friction coefficient of the bearing increased with the increase in Reynolds number.

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Section: Introductionmentioning

confidence: 50%

Section: Theorymentioning

confidence: 99%

See 1 more Smart Citation

Static characteristics of misaligned multiple axial groove water-lubricated bearing in the turbulent regime

Mallya

Shenoy

Pai

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Shenoy and Pai [103] in 2009 investigated theoretically the effect of turbulence and misalignment on the performance characteristics of a centrally loaded 120° single pad externally adjustable bearing under the steady-state operation. They found that for a given eccentricity, adjustment configuration and degree of misalignment with unidirectional load increases the friction variable and shaft attitude angle.…”

Section: Turbulent Effectsmentioning

confidence: 99%

On the Characteristics of Misaligned Journal Bearings

Jang

Khonsari

2015

Lubricants

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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 on the static and dynamic performances. It could cause wear, vibration and even system failure. In this article, a literature review of misalignment of the journal bearings is presented. The basic theory for the misalignment and some results for the circular journal bearing are also presented to show the general trends of the misalignment.

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“…Therefore, for a realistic prediction of the journal bearing performance characteristics data, the consideration of journal misalignment in the analysis is quite desirable. In recent times few studies related to the performance of misaligned hydrostatic/hybrid journal bearing have also been carried out and reported in the literature (San Andres, 1993;Safar and Riad, 1988;Jain et al, 1997;Pierre et al, 2004;Nikolakopoulos and Papadopoulos, 2008;Shenoy and Pai, 2009). San Andres (1993) presented results for the hydrostatic journal bearing operating in the turbulent regime including journal misalignment effects.…”

Section: Introductionmentioning

confidence: 99%

A study of misaligned hole‐entry worn journal bearing operating in turbulent regime

Ram

Sharma

2013

Industrial Lubrication and Tribology

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Purpose -The purpose of this paper is to study theoretically the combined influence of journal misalignment and wear on the performance of a holeentry hybrid journal bearing system. The bearing is assumed to be operating in a turbulent regime. Design/methodology/approach -The modified Reynolds equation based on Constantinescu lubrication theory has been solved by using finite element method together with orifice and capillary restrictors flow equations as a constrain together with appropriate boundary conditions. Findings -It has been observed that for a symmetric hole-entry journal bearing configuration the value of h min is more for the bearing compensated by orifice restrictor as compared to capillary restrictor when bearing operates in turbulent regime under worn/unworn conditions. From the point of view of stability threshold speed v th , the reduction in the value of v th for capillary compensated bearing is around 2 3.89 percent whereas for orifice compensated bearing it is 27.85 percent when misaligned worn bearing is operating in turbulent regime.Originality/value -The present work is original of its kind, in case of misaligned hole-entry worn journal bearing. The results are quite useful for the bearing designer.

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Theoretical investigations on the performance of an externally adjustable fluid-film bearing including misalignment and turbulence effects

Cited by 41 publications

References 8 publications

Static characteristics of misaligned multiple axial groove water-lubricated bearing in the turbulent regime

Static characteristics of misaligned multiple axial groove water-lubricated bearing in the turbulent regime

On the Characteristics of Misaligned Journal Bearings

A study of misaligned hole‐entry worn journal bearing operating in turbulent regime

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