A study of thermohydrodynamic lubrication in a circular journal bearing

Mitsui, Jun'ichi

doi:10.1016/0301-679x(87)90061-2

Cited by 35 publications

(19 citation statements)

References 5 publications

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“…There is a significant increase in the power loss due to increased speed, but it does not vary much due to variation in eccentricity ratio or applied load. Mitsui (1987) conducted a number of experiments on circular journal bearings. The bearing with an L/D value of 0.7, had one axial groove of 10° arc, extending 85% of length, located at the crown of top pad.…”

Section: Numerical Examplesmentioning

confidence: 99%

An Efficient Numerical Procedure for Thermohydrodynamic Analysis of Cavitating Bearings

Vijayaraghavan

1996

Journal of Tribology

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In this paper, an efficient and accurate numerical procedure to determine the thermo-hydrodynamic performance of cavitating bearings is described. This procedure is based on the earlier development of Elrod for lubricating films, in which the properties across the film thickness are determined at Lobatto points and their distributions are expressed by collocated polynomials. The cavitated regions and their boundaries are rigorously treated. Thermal boundary conditions at the surfaces, including heat dissipation through the metal to the ambient, are incorporated. Numerical examples are presented comparing the predictions using this procedure with earlier theoretical predictions and experimental data. With a few points across the film thickness and across the journal and the bearing in the radial direction, the temperature profile is very well predicted.

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Section: Numerical Examplesmentioning

confidence: 99%

An Efficient Numerical Procedure for Thermohydrodynamic Analysis of Cavitating Bearings

Vijayaraghavan

1996

Journal of Tribology

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“…In a perfectly aligned, stationary-loaded bearing a two-dimensional heat transfer analysis generally provides satisfactory results, for thermohydrodynamic analyses show that, indeed, the predictions closely match the experimental results. The interested reader is referred to analyses [6,8,[11][12][13][14][15] where comparison with experimental results of references [16][17][18] are shown to verify the predictions. These analyses also provide a generalized procedure for predicting the effective and maximum bearing temperature as reported in references [9,19,20].…”

Section: Temperature Fieldmentioning

confidence: 92%

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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“…For uniformly magnetized material (18) From (17) and (18) (19) Now from (13) and (19) (20) where . The magnitudes of the vector between different magnetic faces (shown in Fig.…”

Section: B Surface Charge Density Methodsmentioning

confidence: 99%

Magnetic Bearing Configurations: Theoretical and Experimental Studies

Samanta

Hirani

2008

IEEE Trans. Magn.

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A radial magnetic bearing, consisting of two permanent magnets, is an attractive choice because of its zero wear, negligible friction, and low cost, but it suffers from low load capacity, low radial stiffness, lack of damping, and high axial instability. To enhance the radial load and radial stiffness, and reduce the axial thrust, we have made a theoretical and experimental study of various radial configurations, including hydrodynamic lubrication to improve dynamic performance of the magnetic bearing. We developed an experimental setup to investigate the performance of bearing configurations under different operating conditions. The motion of a rotating shaft is mapped by two displacement sensors with a data acquisition system and personal computer. The first critical speed of each configuration is determined experimentally and verified through frequency analysis. We present a polar plot of displacement data.Index Terms-Hydrodynamic bearing, low-friction bearing, natural frequency of magnetic bearing, permanent-magnet bearing, wearless bearing.

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A study of thermohydrodynamic lubrication in a circular journal bearing

Cited by 35 publications

References 5 publications

An Efficient Numerical Procedure for Thermohydrodynamic Analysis of Cavitating Bearings

An Efficient Numerical Procedure for Thermohydrodynamic Analysis of Cavitating Bearings

On the Characteristics of Misaligned Journal Bearings

Magnetic Bearing Configurations: Theoretical and Experimental Studies

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