Influence of Micropolar Lubrication on the Performance of 4-Pocket Capillary Compensated Conical Hybrid Journal Bearing

Sharma, Satish C.; Rajput, Arvind K.

doi:10.1155/2012/898252

Cited by 20 publications

(28 citation statements)

References 31 publications

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“…Since, for hybrid bearing design it must be possible to support the full operating load at maximum speed, the results of maximum speed are presented here. The results are computed for the following dimensionless values of bearing operating and geometric parameters: [7], which are presented in Table 1. The comparisons of the results are in good agreement with the published data.…”

Section: Resultsmentioning

confidence: 99%

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Comparative Study on the Effect of Recesses on Conical Hybrid Journal Bearing Compensated with CFV under Micropolar Fluid Lubrication

2016

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This paper theoretically presents the comparative performances of conical hybrid journal bearing with 4-pockets and 6-pockets compensated with constant flow valve (CFV) under micropolar fluid lubrication for various semi-cone angles. The numerical solution of the modified Reynolds equation for micropolar fluid flow on the conical surface has been done by using finite element method using Galerkin's technique along with the necessary boundary conditions and iterative scheme. The bearing performances have been presented for two different semi-cone angles, radial load and the restrictor design parameter. It is observed that bearing performances improve for 6-pockets CFV than 4-pockets. The bearing performances also increase with increase in semi-cone angle, constant flow valve restrictor and micropolar parameters significantly. With increase in semi-cone angle of bearing the direct stiffness, damping coefficients and the stability have been observed to increase under micropolar lubrication for 6-pockets CFV restrictors.

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Section: Resultsmentioning

confidence: 99%

“…Sharma and Rajput [7][8][9] have demonstrated the influence of micropolar lubricant on a 4 pocket conical hybrid journal bearing system compensated with different restrictors. Dhawan and Verma [10] have analyzed micropolar lubrication in non-circular hybrid journal bearings.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Effect of Recesses on Conical Hybrid Journal Bearing Compensated with CFV under Micropolar Fluid Lubrication

2016

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“…The flow of micropolar lubricant in a bearing system is modelled using Eringen's theory of micropolar fluid. The modified Reynolds equation, governing the flow of micropolar lubricant in the clearance space of a finite length conical journal bearing system as shown in Figure , is expressed as follows …”

Section: Discussionmentioning

confidence: 99%

“…Non‐dimensionalisation of equation using the following non‐dimensional parameters yields equation given as follows

β = \frac{Rsin γ}{r_{j}}; \overset{true¯}{italicp} = \frac{italicp}{p_{s}}; \overset{true¯}{italicl} = \frac{italicc}{italicl}; \overset{true¯}{italich} = \frac{italich}{italicc}; \overset{true¯}{italict} = t / [\frac{italicμ r_{j}^{2}}{c^{2} p_{s}}]; Ω = {normalω}_{italicj} / [\frac{c^{2} p_{s}}{normalμ r_{j}^{2}}]; \overset{true¯}{normalΦ} (italicΝ, \overset{l}{true}, \overset{h}{true}) = \frac{Φ (italicN, italicl, italich)}{c^{3}}

\frac{si {italicn}^{2} γ}{italicβ} \frac{\partial}{\partial β} [\frac{β \overset{true¯}{normalΦ} (italicN, \overset{l}{true}, \overset{h}{true})}{12} \frac{\partial \overset{true¯}{italicp}}{\partial β}] + \frac{1}{β^{2}} \frac{\partial}{\partial α} [\frac{\overset{true¯}{normalΦ} (italicN, \overset{l}{true}, \overset{h}{true})}{12} \frac{\partial \overset{true¯}{italicp}}{\partial}]

…”

Section: Discussionmentioning

confidence: 99%

“…The lubricant flow field has been discretised using four‐node Lagrangian quadrilateral isoparametric elements. Applying finite element method by using the orthogonality condition of Galerkin's technique in equation , the following elemental equation in matrix form is obtained

[{\overset{true¯}{italicF}}^{e}] \{{\overset{true¯}{italicp}}^{e}\} = \{{\overset{true¯}{italicQ}}^{e}\} + Ω \{{\overset{true¯}{italicR}}_{H}^{e}\} + {\overset{\overset{true˙}{italicX}}{true}}_{italicJ} \{{\overset{true¯}{italicR}}_{{italicX}_{italicJ}}^{e}\} + {\overset{\overset{true˙}{italicZ}}{true}}_{italicJ} \{{\overset{true¯}{italicR}}_{{italicZ}_{italicJ}}^{e}\}

where i , j = 1,2, 3,4(number of nodes per element).…”

Section: Discussionmentioning

confidence: 99%

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Stability of a constant flow valve compensated multi‐recess conical hybrid journal bearing operating with micropolar lubricant

Rajput

Sharma

2014

Lubrication Science

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The present paper investigates the influence of micropolar lubrication on the stability of a constant flow valve compensated multi-recess conical hybrid journal bearing system. Eringen's micropolar fluid theory has been used to model the micropolar lubrication in a fluid-film bearing system. The modified Reynolds equation of the micropolar lubricated bearing system has been solved using finite element method. Performance characteristics parameters of four pocket hybrid journal bearing system have been computed for the values of semi-cone angle 10°, 20°and for the judiciously selected micropolar parameters. Numerically simulated results indicate that the value of stability threshold speed margin gets increased substantially with the use of micropolar lubricant vis-à-vis Newtonian lubricant.

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Design of Hybrid Bearings and Its Development: A Review

Singh

Agarwal

2021

Lecture Notes in Mechanical Engineering

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Influence of Micropolar Lubrication on the Performance of 4-Pocket Capillary Compensated Conical Hybrid Journal Bearing

Cited by 20 publications

References 31 publications

Comparative Study on the Effect of Recesses on Conical Hybrid Journal Bearing Compensated with CFV under Micropolar Fluid Lubrication

Comparative Study on the Effect of Recesses on Conical Hybrid Journal Bearing Compensated with CFV under Micropolar Fluid Lubrication

Stability of a constant flow valve compensated multi‐recess conical hybrid journal bearing operating with micropolar lubricant

Design of Hybrid Bearings and Its Development: A Review

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