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Meccanica

, Volume 9, Issue 2, pp 121–129 | Cite as

Oil whirl in porous metal bearings

  • Erminio Capone
  • Vincenzo D'Agostino
Article

Summary

Peculiar vibrations of journal bearings, tipical of balanced rigid rotors, are examined in order to elucidate the phenomenon in phisical terms and supply design diagrams for limiting its harmful effects in porous metal bearings.

Keywords

Mechanical Engineer Civil Engineer Harmful Effect Journal Bearing Rigid Rotor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols

i

radial clearance

D

bearing diameter

L

bearing length

r

journal radius

e

eccentricity

E =e/c

eccentricity ratio

Μ

oil viscosity

ψ

porosity coefficient

m

shaft mass

Ω

angular speed

Wm,Wmt

fluid-dynamic thrust components

Wm1,Wt1

statical components of the fluid-dynamic thrust

α

whirl frequency

χ =α/Ω

frequency number

Ft

friction force

Sommario

Viene esaminato un particolare fenomeno vibratorio della coppia cinematica pernocuscinetto, caratieristico dei rotori rigidi e perfettamente bilanciati.

Con tale studio si è inteso chiarire fisicamente il fenomeno, e soprattutto fornire, relativamente ai cuscinetti porosi, dei diagrammi alti, in sede di progetto, a limitare gli effetti nocivi da esso derirabili.

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References

  1. [1]
    E. Capone,Oil whirl in journal bearings under no-load conditions, WEAR, 26, pp. 207–217, 1973.Google Scholar
  2. [2]
    E. Capone,Lubrication of axially undefined porous bearings, WEAR, 15, pp. 157–167, 1973.Google Scholar
  3. [3]
    E.Capone and G.Santoro,Cuscinetti portanti porosi, assialmente indefiniti, lubrificati a bassa pressione, La Ricerca I 1970.Google Scholar
  4. [4]
    E.Capone and E.De Rosa,Sulla determinazione delle caratteristiche funzionali dei cuscinetti porosi, I Congr. Naz. AIMETA, 1971.Google Scholar
  5. [5]
    E.Capone,Free and forced bivrations in journal bearings, (in corso di pubblicazione).Google Scholar
  6. [6]
    W. J. Harrison,The hydrodynamical theory of the lubrication of a cylindrical bearing tinder variable load, Trans. Camb. Phil. Soc. Vol. 22, p. 273, 1913–23.Google Scholar
  7. [7]
    B. L. Newkirk,Journal bearings instability, Conf. Lubr. and Wear, Instn. Mech. Engrs., p. 179, London, 1957.Google Scholar

Copyright information

© Tamburini Editore 1974

Authors and Affiliations

  • Erminio Capone
    • 1
  • Vincenzo D'Agostino
    • 2
  1. 1.Istituto di Meccanica Applicata alle MacohineUniversità di NapoliItalia
  2. 2.Istituto di Meccanica Applicata alle MacchineUniversità di NapoliItalia

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