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Approximate Numerical Solution of Hydrodynamic Gas Journal Bearings
2008Considering small pressure change in the gas film of hydrodynamic gas-lubricated journal bearings, the corresponding nonlinear Reynolds equation is linearized through appropriate approximation and approximate Reynolds equation is derived and solved by means of finite difference method (FDM).
Haijun Zhang, Changsheng Zhu, Qin Yang
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Optimum computerized design of hydrodynamic journal bearings
International Journal of Mechanical Sciences, 1976Abstract Solutions of the Reynolds equation have been computed for a bearing configuration which, previously, has received little attention theoretically. Operating characteristics evaluated from the computed solutions are presented graphically, and also form the basis for the development of a computerized optimum design technique. The optimum design
D. Dowson, J.N. Ashton
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Hydrodynamic Lubrication of Journal Bearings with a Polymer Melt
Journal of Mechanical Design, 1980An experimental investigation of hydrodynamic lubrication of journal bearings was conducted using a polymer melt as the lubricating fluid. The test apparatus monitored the pressure profile, eccentricity ratio, axial flow rate and frictional power loss for a bearing with L/D = 1.5.
J. V. Accorsi, T. A. DeRossett
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Hydrodynamic and Elastohydrodynamic Studies of a Cylindrical Journal Bearing
Journal of Hydrodynamics, 2010In this article, the effect of the bearing elastic deformation on the performance characteristics of a cylindrical journal bearing is analyzed. The variety of simulation models covers hydrodynamic (HD) and elastohydrodynamic (EHD) lubrication theories. The Reynolds equations governing the flow in the clearance space of the journal bearing are obtained ...
Molka Attia Hili +4 more
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Stresses and deformation of a long hydrodynamic journal bearing
Computers & Structures, 1993Abstract The pressure in the lubricant film of a long hydrodynamic journal bearing is non-axisymmetric in nature. Therefore, Lame's equations are not valid to calculate the stresses and deformation of the bearing. In this paper, a closed-form solution has been obtained to calculate the stresses and deformation of the bearing by means of Airy's stress
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Hybrid (hydrodynamic + permanent magnetic) journal bearings
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2007Survey of patents on bearings indicates the maturity of hydrodynamic and rapid development of magnetic bearings. Active magnetic bearings are costlier compared with permanent magnetic bearings. To understand the performance characteristics of permanent magnetic bearings, an experimental setup has been developed. Experimental studies on radial permanent
HIRANI, H, SAMANTA, P
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Performance Analysis of a Conical Hydrodynamic Journal Bearing
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 2018Many turbo-machines such as turbines and compressors generate axial and radial load during their operation. Conical hydrodynamic journal bearing is proposed to sustain radial load and adjust the effect of axial load on rotating elements. The present study has proposed the performance analysis for conical hydrodynamic journal bearing of semi-cone angles
Ajay Kumar Gangrade +2 more
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Thermohydrodynamic Analysis for a Hydrodynamic Journal Bearing Groove
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2005Abstract A numerical procedure is developed for the analysis of thermohydrodynamic behaviour of the hydrodynamic (HD) flow in the groove of a journal bearing. The Navier-Stokes and energy equations are written in terms of the primitive variables u, v, p , and
L Jeddi, M El Khlifi, D Bonneau
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Advances in Materials and Processing Technologies, 2023
P. Sudam Sekhar +8 more
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P. Sudam Sekhar +8 more
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Active Vibration Control of Hydrodynamic Journal Bearings
2011Rotor instability is one of the most serious problems of high-speed rotors supported by sliding bearings. With constantly increasing parameters, new machines problems with rotor instability are encountered more and more often. Even though there are many solutions based on passive improvement of the bearing geometry to enlarge the operational speed ...
J. Tůma +4 more
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