Performance Characteristics of Two-Lobe Hydrodynamic Journal Bearings

The present study analyzes the effect of pressure dam depth and relief track depth on the performance of three-lobe pressure dam bearing. Different values of dam depth and relief track depth are taken in nondimensional form in order to analyze their effect. Results are plotted for different parameters against eccentricity ratios and it is shown that the effect of pressure dam depth and relief track depth has great significance on stability and other performance parameters. Study of stability and performance characteristics is undertaken simultaneously.

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“…Equation (6) gives the steady-state pressure distribution and (7) and (8) give the dynamic pressure distribution in each individual lobe.…”

Section: Theorymentioning

confidence: 99%

“…Kumar et al [7] had done the detail study and analysis of two-lobe pressure bearing and shown the superiority of these bearings over conventional circular bearing. Static and dynamic characteristics of orthogonally displaced pressure dam bearing had been studied by Mehta [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dam Depth and Relief Track Depth on Steady-State and Dynamic Performance Parameters of 3-Lobe Pressure Dam Bearing

Kumar

Kakoty

2017

Advances in Tribology

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“…The different sections includes two-lobed, three-lobed and four-lobed bearings, micropolar lubrication, lubrication with non-Newtonian lubricants, porous bearings and comparative study of different bearing configurations. Kumar et al (1980) computed a design data using a variational solution which included Sommerfeld number, equilibrium locus, damping coefficient, fluid film stiffness, temperature rise parameter and end flow friction parameter.…”

Section: Review Of Non-circular Bearingsmentioning

confidence: 99%

A Review on Non-Circular Journal Bearings

Jose¹

2018

IJMPERD

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Hydrodynamic bearings depend on the high journal speed to move the pressurized fluid in a wedge between the faces. Instabilities due to oil whip and whirl are usually observed when using hydrodynamic circular journal bearing in high speed rotating machinery. To overcome these difficulties, non-circular bearings are usually preferred over circular bearings. A non-circular journal bearing has increased shaft stability, increased oil flow and reduced power losses as compared to circular journal bearing under proper working conditions. This paper deals with a review of major works conducted on non-circular bearings to improve the performance characteristics. The effect of incorporating pressure dams in bearings, use of porous bearing, use of non-Newtonian lubricants and micropolar lubricants on the static and dynamic characteristics of the bearing have also been analyzed.

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“…Therefore, researchers showed interest to examine the noncircular (lobed) bearing. The analysis of lobed bearing was given by [4][5][6][7]. These researchers analyzed the performances of such bearings and found that lobed bearings were much better in stability, which was the main problem of high speed rotating machineries.…”

Section: Introductionmentioning

confidence: 99%

Effect ofL/DRatio on the Performance of Two-Lobe Pressure Dam Bearing: Micropolar Lubricated

Sharma

Krishna

2015

Advances in Tribology

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Two-lobe pressure dam bearings are commonly used in high speed rotating machineries. Their use is considered more stable than plain cylindrical bearings. Such bearings have a dam in the upper half whereas the lower half is provided with a relief track. Performance of two-lobe pressure dam bearings under micropolar fluid is evaluated. Finite element method is used to solve the modified Reynolds equation. Fluid film pressures are obtained by solving modified Reynolds equation. Thus pressure obtained is used to find performance characteristics of this bearing. The dynamic performance characteristics are studied at variousL/Dratios. ThreeL/Dratios are considered 1.6, 2.0, and 2.4 for the analysis purpose. Results obtained are presented for various micropolar parameters. Results show that stability of two-lobe pressure dam bearings increases with decrease in aspect ratio (L/D).

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Performance Characteristics of Two-Lobe Hydrodynamic Journal Bearings

Cited by 30 publications

References 0 publications

Effect of Dam Depth and Relief Track Depth on Steady-State and Dynamic Performance Parameters of 3-Lobe Pressure Dam Bearing

Effect of Dam Depth and Relief Track Depth on Steady-State and Dynamic Performance Parameters of 3-Lobe Pressure Dam Bearing

A Review on Non-Circular Journal Bearings

Effect ofL/DRatio on the Performance of Two-Lobe Pressure Dam Bearing: Micropolar Lubricated

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