Theoretical Investigation of Fluid Inertia Effects and Stability of Self-Acting Gas Journal Bearings-Reference-Cited by-同舟云学术

Theoretical Investigation of Fluid Inertia Effects and Stability of Self-Acting Gas Journal Bearings

Published:1999-10-01 Issue:4 Volume:121 Page:836-843
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Belforte G.¹,Raparelli T.²,Viktorov V.¹

Affiliation:

1. Department of Mechanics, Politecnico di Torino, C.so Duca degli Abruzzi, 24-10129 Torino, Italy

2. Department of Energetics, University di L’Aquila, 67040 Roio Poggio-L’Aquila, Italy

Abstract

The journal equation of motion and the complete Reynolds equation of compressible fluid film are numerically solved and a computer program is developed. The formulas are for externally pressurized bearings, but results are shown only for self-acting bearings. For certain cases, the validity of the theoretical results is verified by comparison with the experimental data available from the literature. Through intensive use of the program, journal center trajectories are obtained and effects of fluid inertia are investigated. New stability parameters are presented and stability diagrams are established for bearings with L/D = 0.25, 0.5, 1, 1.5, and 2. The rotor unbalance effects on bearing stability limits are illustrated for several cases.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/121/4/836/5938864/836_1.pdf

Reference18 articles.

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2. Akkok M. , and McC. EttlesC. M., 1980, “The Effect of Grooving and Bore Shape on the Stability of Journal Bearings,” ASLE Transaction, Vol. 23, No. 4, pp. 431–441.

3. Ausman J. S. , 1961, “An Improved Analytical Solution for Self-Acting, Gas Lubricated Journal Bearings of Finite Length,” ASME Journal of Basic Engineering, Vol. 83, No. 2, pp. 188–194.

4. Ausman J. S. , 1963, “Linearised ph Stability Theory for Translatory Half-Speed Whirl of Long, Self-Acting Gas-Lubricated Journal Bearings,” ASME Journal of Basic Engineering, Vol. 85, No. 4, pp. 611–619.

5. Cantaloube, A., and Boudet, R., 1997, “Determination of the dynamic characteristics of an aerostatic journal bearing under hybrid conditions,” Acts of National Congress AIMETA, Siena, Italy, pp. 261–266.

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