Static Characteristics of Conical Hydrostatic Journal Bearing Under Micropolar Lubrication

Rana, Narendra Kumar; Gautam, Satyam Shivam; Verma, Suresh

doi:10.1007/s40032-014-0148-7

Cited by 10 publications

(7 citation statements)

References 15 publications

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“…Rajput and Sharma (2014) further studied CFV conical hybrid journal bearing using Newtonian and micropolar fluid and compared bearing performances, and Rajput and Sharma (2014) observed that when micropolar fluid is put into service, it increased thickness of fluid film, bearing stiffness, damping and bearing threshold speed. Rana et al (2014) theoretically studied conical journal bearing with CFV using micropolar fluid and noted that the bearing is much stable for larger pressure developed. Rana et al (2019) further extended their work and studied hybrid conical journal bearing for 90° and 45° loading configurations; Rana et al (2019) observed that 45° loading configuration is more suitable for minimum thickness of fluid film, bearing damping and stiffness.…”

Section: Introductionmentioning

confidence: 99%

Restrictor-based studies of hybrid hole-entry conical journal bearings

Khakse

Phalle²

2021

ILT

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Purpose This paper aims to describe how successfully a particular restrictor delivers its best in increasing the conical journal bearing performance. The restrictors are used in the hole-entry conical journal bearing subjected to hybrid mode. Thus, the restrictors, like constant flow valve (CFV), orifice and capillary, are studied comparatively. Design/methodology/approach Numerical simulation for the bearing results with the three restrictors are obtained by using finite element method (FEM) under the well-known modified Reynolds equation. Findings When the hole-entry conical journal bearings, with the restrictor design parameter range C¯s2 = 0.03 – 0.09, are operated, the results obtained are quite distinctive and significant. It indicates that the CFV restrictor-based conical bearing gives enhanced performance in comparison to orifice and capillary restrictors. Moreover, it suggests the performance-wise sequence of the restrictors in hybrid bearings as CFV > Orifice > Capillary. Originality/value The outcome of the research paper will give insight to help the bearing designer to choose the particular restrictor in hybrid conical bearing depending on the industrial need.

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Section: Introductionmentioning

confidence: 99%

Restrictor-based studies of hybrid hole-entry conical journal bearings

Khakse

Phalle²

2021

ILT

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“…The multirecess externally pressurised journal bearing with micropolar lubrication has been studied by Verma et al [1]. Rana et al have studied theoretically the effect of micropolar fluid parameters on the steady state as well as stiffness and damping characteristics of 4-pocket constant flow valve compensated hydrostatic conical journal bearing [2,3]. Sharma et al [4,5] theoretically analyzed the effect of wear on the characteristics of a 4 pocket hydrostatic/hybrid conical journal bearing system for different cone angles with different restrictors for different load arrangements.…”

Section: Introductionmentioning

confidence: 99%

Stiffness and damping characteristics of conical multirecess hybrid journal bearing for different load arrangements

2019

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This paper presents the theoretical analysis on the effect of two different load arrangements for a conical multirecess hybrid journal bearing. For this analysis constant flow valve restrictors are used under micropolar lubricant for different semi cone angles. The modified Reynolds equation using micropolar fluid flow on the conical surface has been solved with the use of FEM and Galerkin's technique applying proper boundary conditions in the iterative scheme. The study suggests that the configuration LA I can be a better alternative as compared to LA II for different semi-cone angles and external load in terms of bearing characteristics. Keywords CFV restrictor • Conical bearing • Micropolar lubrication • FEM List of symbols a b Axial bearing land width, mm A p Area of pocket, mm 2 A b Area of bearing, mm 2 A e Area of each element c Radial clearance, mm C ij Fluid film damping coefficients (N/mm 2), (i, j = x, z) D m Mean journal diameter of conical shaft, mm e Eccentricity, mm F Fluid film reaction F x , F z Fluid film reaction component, N h Fluid film thickness, mm l m ,l Bearing characteristic length L Bearing length, mm M Journal mass, kg p s Supply pressure, N/mm 2 Q Lubricant flow (mm 3 /s) R j Journal radius, mm r Radial coordinate S ij Fluid film stiffness coefficients (N/mm),

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“…It is convenient to use conical bearings to increase the mechanical performance of the machines. In this group, multilobe conical bearings stand out for their stable dynamic characteristics [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Inertia Effects in a Multilobe Conical Bearing Lubricated with a Couple Stress Fluid

Walicka

Walicki

Jurczak

2019

International Journal of Applied Mechanics and Engineering

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In this paper, a multilobe conical bearing is analyzed. A lubricant modelled by a couple stress fluid flows in the bearing clearance. The Galerkin method is used to determine the mechanical parameters of multilobe journal bearings. An example of a two-lobe conical bearing is discussed in detail. The inertia of the flowing lubricant is taken into account in the analysis. It has been found that the increase of the couple stress generates an increase the pressure in the clearance.

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Static Characteristics of Conical Hydrostatic Journal Bearing Under Micropolar Lubrication

Cited by 10 publications

References 15 publications

Restrictor-based studies of hybrid hole-entry conical journal bearings

Restrictor-based studies of hybrid hole-entry conical journal bearings

Stiffness and damping characteristics of conical multirecess hybrid journal bearing for different load arrangements

Inertia Effects in a Multilobe Conical Bearing Lubricated with a Couple Stress Fluid

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