Results 171 to 180 of about 28,663 (219)

A Hero-Jet Driven Porous Spherical Hydrostatic Gas Bearing Gyro

Journal of Lubrication Technology, 1973
The gyro system under consideration consists of a hollow porous sphere supported in a hydrostatic gas-lubricated spherical bearing. High pressure gas leaking into the sphere through the pores from the bearing film pressurizes the inside of the sphere and is exhausted from a series of Hero jets located around the equator to counter the viscous drag from
A. L. Gu, J. A. Walowit, D. F. Wilcock
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A Porous Hydrostatic Gas Bearing for Use in Miniature Turbomachinery

A S L E Transactions, 1971
An analytical program was conducted to establish recommended types of gas-lubricated journal bearings for use in miniature cryogenic turbomachinery. Very high rotative speeds, and the limiting damping properties of gas, indicated that fractional frequency whirl is prevalent, and the most difficult problem to overcome.
S. Heller, W. Shapiro, O. Decker
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Static Properties of Hydrostatic Thrust Gas Bearings With Curved Surfaces

Journal of Lubrication Technology, 1972
The classical treatment of circular, hydrostatic, orifice-regulated thrust gas bearings, in which perfectly plane bearing plates are assumed, is extended to include axisymmetric, but otherwise arbitrary, plate profiles. Plate curvature has a strong influence on bearing load capability, static stiffness, tilting stiffness, and side force per unit ...
F. H. Rehsteiner, R. H. Cannon
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Static and dynamic performance analysis of radial hydrostatic gas bearings

AIP Conference Proceedings, 2019
Hydrostatic gas bearings have been widely used in industrial applications, however, the dispersion of the extremely thin gas film has always plagued engineers who want to use the computational fluid dynamics method to predict the performance of them. This paper combined the relevant modules of commercial software COMOSL Multiphysics, which avoids the ...
Changpei Zhuang, Xiaojun Wang, Chunjie Yan   +2 more
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Vibration of a hydrostatic gas bearing due to supply pressure oscillations

Wear, 1984
The vibration of a statically loaded, inherently compensated hydrostatic journal bearing due to oscillating supply pressure is investigated. Both angular and radial vibration modes are analyzed. The time-dependent Reynolds equation governing the pressure distribution between the oscillating journal and the sleeve is solved numerically together with the
H.D. Branch, C.B. Watkins, I.E. Eronini
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Modeling and Experimental Investigation of Micro-Hydrostatic Gas Thrust Bearings for Micro-Turbomachines

Volume 4: Turbo Expo 2005, 2005
One of the major challenges for the successful operation of high-power-density micro-devices lies in the stable operation of the bearings supporting the high-speed rotating turbomachinery. Previous modeling efforts by Piekos [1], Liu et al. [2] and Spakovszky and Liu [3] have mainly focused on the operation and stability of journal bearings.
C. J. Teo, Z. S. Spakovszky
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Amplitude Effects on the Dynamic Performance of Hydrostatic Gas Thrust Bearings

Journal of Lubrication Technology, 1979
A strip gas film bearing with inherently compensated inlets is analyzed to determine the effect of disturbance amplitude on its dynamic performance. The governing Reynolds’ equation is solved using finite-difference techniques. The time dependent load capacity is represented by a Fourier series up to and including the third harmonics.
A. Kent Stiffler, R. R. Tapia
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Hydrostatic slider gas bearings fed through a row of porous discs

International Journal of Machine Tool Design and Research, 1971
Abstract This paper analyses some advantagesof externally pressurized gas bearings onto which gas is supplied through a row of porous discs, the surfaces of which are ground together with the bearing pad surface. Formulae and curves are given for calculating the main static and dynamic characteristics and for stability analysis.
R. Gomez, M. Szwarcman
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Design Study of a Hydrostatic Gas Bearing With Inherent Orifice Compensation

Journal of Fluids Engineering, 1957
Abstract A hydrostatic gas bearing can provide shaft support with very low friction in high-speed devices such as centrifuges and gyroscopes and in precision static devices such as dynamometers. For comparable load conditions, the friction torque required to rotate a hydrostatic bearing is from 100 to 10,000 times less than the friction ...
S. K. Grinnell, H. H. Richardson
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Rotordynamic Performance of Flexure Pivot Hydrostatic Gas Bearings for Oil-Free Turbomachinery

Volume 6: Turbo Expo 2004, 2004
Micro-turbomachinery demands gas bearings to ensure compactness, lightweight and extreme temperature operation. Gas bearings with large stiffness and damping, and preferably of low cost, will enable successful commercial applications. Presently, tests conducted on a small rotor supported on flexure pivot–hydrostatic pad gas bearings (FPTPBs ...
Xuehua Zhu, Luis San Andrés
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