Results 221 to 230 of about 134,453 (255)

Design of aerostatic journal bearings with partially porous walls

International Journal of Machine Tool Design and Research, 1978
Abstract Steady-state characteristics of aerostatic journal bearings fed through rows of porous inserts are investigated. The use of a simplified mathematical model allows to derive relationships for the load-capacity, the stiffness, the gas flow rate and the power consumption of the bearing, as functions of the supply pressure, the relative ...
M. Szwarcman, R. Gorez
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Axially undefined porous journal bearings considering cavitation

Wear, 1972
Abstract An analysis is made of the performance of axially undefined porous journal bearings using the Reynolds' boundary conditions. Expressions for angular film-extent, pressure distribution, load carrying capacity, attitude angle and coefficient of friction are obtained in closed form.
J. Prakash, Sanjay Kumar Vij
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Analysis of two-lobe porous hydrodynamic journal bearings

Wear, 1980
Abstract The two-lobe porous hydrodynamic journal bearing has been analysed to study its static and dynamic performance characteristics. A comparison of the static and dynamic performance characteristics of porous and non-porous two-lobe bearings has also been made on the basis of comprehensive data for a wide range of permeability parameters.
R. Sinhasan, M. Malik, Mahesh Chandra
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Externally Pressurized Gas Journal Bearings With Porous Inserts

Journal of Lubrication Technology, 1980
An analytical solution of externally pressurized gas journal bearings with porous inserts as restrictors is presented. The solution is based on a first-order perturbation method with respect to eccentricity ratio.
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Analysis of Porous Layered Journal Bearing Lubricated with Ferrofluid

Applied Mechanics and Materials, 2016
This paper presents an analysis of porous layered long journal bearing lubricated with ferrofluid using displaced infinitely long wire magnetic field model. The ferrofluid flow in the porous region is analyzed using modified Brinkman model.
T.V.V.L.N. Rao, A.M.A. Rani, T. Nagarajan, F.M. Hashim   +3 more
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Gas-Lubricated Porous Bearings—Short Journal Bearings, Steady-State Solution

Journal of Lubrication Technology, 1977
The governing equations for a short porous bearing are derived by adopting Ocvirk’s approximation to the general equations for a finite bearing, which are given in a previous paper (reference [1]). Crank-Nicholson’s numerical method and the analytical-numerical technique, which consists of Green function approximation and the local smoothing by ...
Erh-Rong Wu, Vittorio Castelli
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Torque of misaligned gas-lubricated porous journal bearings

Wear, 1976
Abstract A perturbation solution is obtained for torque produced by misaligned porous gas journal bearings. It is shown that misalignment torque in porous bearings is higher than that obtained in conventional (externally pressurized and self-acting) gas bearings. The results are given in graphical and tabular form.
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Analytical solution for two‐dimensional Reynolds equation for porous journal bearings

Industrial Lubrication and Tribology, 2006
PurposeAims to explore many aspects of the dynamic behaviour of a rotor on bearings, such as the fluid film force. In order to find in an analytical model an effective solution to provide a more readable description of the interaction between journal and bearing.Design/methodology/approachThe present theoretical analysis is carried out to determine the
D'AGOSTINO, Vincenzo, SENATORE, ADOLFO
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Mathematical model. existence and uniqueness of cavitation problems in porous journal bearing

Nonlinear Analysis: Theory, Methods & Applications, 1993
Self lubricating bearings are a constituent of an impervious turning shaft, surrounded with a bush, which is made of a porous sintered material, impregnated with oil. A thin film of oil separates the bush from the turning shaft. The behavior of the oil in this gap is usually taken into account by considering the Reynolds hydrodynamic equation. At first
Boukrouche, Mahdi, Bayada, Guy
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Effects of Misalignment on the Performance of Flexible Porous Journal Bearings

Tribology Transactions, 2003
A mathematical model is introduced to study the effects of journal misalignment on the hydrodynamic lubrication performance of finite flexible porous journal bearings. A modified form of Reynolds equation, which was derived from the Brinkman-extended Darcy equations and Stokes' equations, is utilized in the present study.
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