Micropolar lubricant effects on the performance of noncircular lobed bearings

Rahmatabadi, A D; Nekoeimehr, M; Rashidi, Reza

doi:10.1016/j.triboint.2009.07.002

Cited by 78 publications

(81 citation statements)

References 20 publications

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“…In similar tasks, dedicated to the hydrodynamic designs of the radial journal bearings of the finite length with porous bushings (Cusano & Conri, 1974;Akhverdiev & Mulenko, 2002;Akhverdiev, Mukutadze, Novgorodova, & Cherkasova, 2013;Cusano & Funk, 1977;Mukutadze, Aleksandrova, Konstantinov, & Shevchenko, 2012;Zadorozhnaya, 2015;Rozhdestvensky & Zadorozhnaya, 2014;Tolpinskaya, 1986;Rahmatabadi, 2010;Akhverdiev, Kochetova, & Mukutadze, 2009;Akhverdiev, Kopotun, & Mukutadze, 2007;Akhverdiev & Kopotun, 2005), their permeability is considered to be constant, and the feed lubricant direction is not taken into consideration. Such set of variable factors cannot provide the stable liquid mode.…”

Section: Introductionmentioning

confidence: 99%

Damper with Porous Anisotropic Ring

Akhverdiev¹

2016

MER

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Section: Introductionmentioning

confidence: 99%

Damper with Porous Anisotropic Ring

Akhverdiev¹

2016

MER

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“…This has necessitated the development of multilobe journal bearing to prevail over the fluid induced instabilities. Recently, many studies related to multilobe journal bearings have been carried out and reported in the published literature [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A study of 2-lobe symmetric hole entry hybrid journal bearing operating with non-Newtonian lubricant considering thermal effects

Kushare¹,

Sharma

2015

Tribology International

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“…Recently, Rahmatabadi et al (2010) studied two, three and four-lobe non-circular hydrodynamic journal bearing configurations lubricated with micropolar fluids. The results showed that the bearings lubricated with micropolar lubricants may produce significant enhancement in the static performance characteristics.…”

Section: Introductionmentioning

confidence: 99%

Performance of a noncircular 2‐lobe multirecess hydrostatic journal bearing with wear

Sharma

Phalle

Jain

2012

Industrial Lubrication and Tribology

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Purpose -Noncircular journal bearings are used in industry because of their simplicity, efficiency and low cost. During the life time of a machine, these are required to be operated over a number of years and are submitted to several stops and starts. As a result, the bush becomes progressively worn out and the bearing performance changes. The purpose of this paper is to study theoretically the influence of wear on the performance of a non-circular 2-lobe four-pocket multirecess hybrid journal bearing system. Design/methodology/approach -The Reynolds equation governing the flow of lubricant in the clearance space of a non-circular 2-lobe multirecess worn hybrid journal bearing system has been solved using FEM along with appropriate boundary conditions. The defects caused by wear are centered on the load line and range from 10 per cent to 50 per cent of the bearing radial clearance. Findings -The numerically simulated results based on a Newtonian lubricant and the steady state flow field system have been presented in terms of maximum fluid film pressure, minimum fluid film thickness, lubricant flow rate, direct fluid film stiffness and damping coefficients and stability threshold speed margin. The paper demonstrates that, for the bearing configurations studied, the bearing behavior is clearly affected by wear. The numerically simulated results indicate that for an offset factor of d ¼ 1.2, the value of h min reduces by 21.21 per cent atOriginality/value -The presented results have valuable data in case of 2-lobe four pocket hybrid journal bearing compensated with constant flow valve restrictor. The paper outcomes are sure to be of interest for researchers and useful for bearing designers.

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Micropolar lubricant effects on the performance of noncircular lobed bearings

Cited by 78 publications

References 20 publications

Damper with Porous Anisotropic Ring

Damper with Porous Anisotropic Ring

A study of 2-lobe symmetric hole entry hybrid journal bearing operating with non-Newtonian lubricant considering thermal effects

Performance of a noncircular 2‐lobe multirecess hydrostatic journal bearing with wear

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