Results 211 to 220 of about 134,453 (255)

Porous Metal Journal Bearings

2013
Porous journal bearings are made of a porous bush impregnated with oil, acting as an oil reservoir, and so avoiding any external oil supply, for lubricating the contact between a rotating shaft and the stationary bush (or sometimes between a stationary shaft and a rotating bush).
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Double layer porous journal bearing analysis

Mechanics of Materials, 1983
Abstract A double layer porous journal bearing has been studied using the short bearing approximation. Taking the curvature of the bearing into consideration, expressions for the pressure distribution, load carrying capacity, coefficient of friction, and the attitude angle are derived.
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Investigation of slip effects in plane porous journal bearings

Wear, 1981
Abstract Slip effects in plane porous journal bearings are considered realistically: only the slip coefficient is treated as an independent parameter and the porosity and the ratio of clearance to journal radius are the other factors which determine the effects of slip.
M. Chandra, M. Malik, R. Sinhasan
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The Effects of Geometric Irregularities of Journals on the Performance of Porous Bearings

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 1994
In the theoretical analysis of porous bearings the journal has so far been assumed to be ideal, that is perfectly cylindrical. In the present analysis the geometric irregularities of the journal, such as circumferential undulations and barrel/bellmouth shapes, are taken into account.
T S Chennabasavan, R Raman
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Effect of Surface Roughness in a Narrow Porous Journal Bearing

Journal of Tribology, 1999
This paper examines the effect of surface roughness in hydrodynamic narrow porous journal bearings operating under steady conditions. The problem is formulated mathematically and solved analytically with appropriate boundary conditions. It is shown that the results are significantly different than those for the case of an infinitely long journal ...
GURURAJAN, K, PRAKASH, J
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Lubrication of a Two-Layer Porous Journal Bearing

Journal of Mechanical Engineering Science, 1972
An analytical solution for the performance characteristics of a two-layer porous bearing, using the short-bearing approximation, is obtained. Results are presented which relate the eccentricity ratio and coefficient of friction as functions of load number for design variables of 0·0001, 0·001, 0·01, and 0·1 and for a ratio of the permeability of the ...
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Non-Newtonian effects on porous elastic journal bearings

Tribology International, 2018
Abstract This work investigates numerically couple stresses influence on finite porous elastic journal bearings performance. Using the micro-continuum theory of Stokes, the Reynolds equation, considering bearing elastic deformation and Beaver-Joseph velocity conditions at the film-porous interface, is derived. The porous flow is modeled using Darcy's
Anas Sakim, Mohamed Nabhani, Mohamed El Khlifi   +2 more
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Hydrostatic Journal Bearing With Porous Pads and Improved Properties

Journal of Tribology, 2019
Abstract A hydrostatic journal bearing with porous pads to improve its performance is designed. The porous pads, which are embedded in recesses of the hydrostatic journal bearing, not only allow lubricant to flow through them but also form a complete cylindrical surface with the bearing land.
Dein Shaw, Hui-An Hsieh
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Analysis of externally pressurized porous gas journal bearings —II

Wear, 1975
Abstract This analysis gives a theoretical design method for externally pressurized porous gas journal bearings. The steady state performance characteristics of a stationary and a rotating journal at various design conditions are studied. The theoretical analysis has been obtained by the simultaneous solution of the continuity equation (derived from ...
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Designing the Partially Porous Journal Bearings of an Aerostatic Spindle

Applied Mechanics and Materials, 2017
The aerostatic journal bearings are widely used in ultra-precision machine tools. Due to remarkable ability of the porous medium in flow restriction, the porous aerostatic journal bearings are better than other types of aerostatic bearings in load carrying capacity, stiffness, damping and dynamic stability.
Te Yen Huang, Song Chiang Shen, Shao Yu Hsu   +2 more
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