Skip to main content
SpringerLink
Log in

Stability of Rotors in Bearings

  • Chapter
Dynamics of Rotors

Part of the book series: International Centre for Mechanical Sciences ((CISM,volume 273))

  • 366 Accesses

Abstract

A rotor is said to be unstable when the shaft orbit increases with time, without apparent limit. Instability begins when the rotor speed exceeds a so-called “threshold” speed. Stable operation usually resumes when the speed is again decreased below this threshold speed. Unstable whirl motions can cause mechanical problems such as rubbing between journal and bearing, seal rubbing, and blade/stator rub contacts, and may result in substantial machine damage. Unstable motions can also themselves introduce additional dynamic forces within the bearing which stabilize the whirling at a limiting whirl radius. Such whirl motions are called “bounded” instabilities.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Newkirk, B. L., “Shaft Whipping,” General Electric Review (1924).

    Google Scholar 

  2. Kimball, A.J., “Internal Friction Theory of Shaft Whirling,” General Electric Rep. Vol. 27, p. 266 (1926).

    Google Scholar 

  3. Robertson, D., “Hysteretic Influences on the Whirling of Rotors,” Proc. Inst. Mech. Eng., Vol. 131, p. 513 (1935).

    Article  Google Scholar 

  4. Kimball, A.L., “Measurement of Internal Friction is a Revolving Deflected Shaft,” General Electric Review, Vol. 28, p. 554 (1925).

    Google Scholar 

  5. Kushul, M.Y. “The Self-Induced Oscillations of Rotors,” Consultants Bureau, NY (1964).

    Google Scholar 

  6. Gunter, E.G. and Trumpler, P.R., “The Influence of Internal Friction on the Stability of High Speed Rotors with Anisotropic Supports,” ASME Paper No. 69-VIBR-2, (1969).

    Google Scholar 

  7. Newkirk and Lewis, “Oil Film Whirl, and Investigation of Disturbances due to Oil Films in Journal Bearings,” Trans. ASME Vol. 78, p. 21 (1954).

    Google Scholar 

  8. Pinkus, O.J., “Experimental Investigation of Resonant Whip,” Trans. ASME Vol. 87, p. 975 (1956).

    Google Scholar 

  9. Tondl, A., “Experimental Investigation of Self-Excited Vibrations of Rotors due to the Action of Whirling Oil Film in Journal Bearings,” Monographs and Memoranda No. 1 (1961).

    Google Scholar 

  10. Tondl, A., “Notes on the Problem of Self-Excited Vibrations and Non-Linear Resonances of Rotors Supported in Several Journal Bearings,” Wear, 8 (1965).

    Google Scholar 

  11. Tondl, A., “Some Problems of Rotor Dynamics,” Publishing House of the Czechoslovakian Academy of Sciences, Prague (1965).

    Google Scholar 

  12. Lund, J.W., “The Stability of an Elastic Rotor in Journal Bearings with Flexible, Damped Support,” Trans. ASME, Jurnal Appl. Mech., Series E, Vol. 87, p. 911. (1965).

    Article  Google Scholar 

  13. Sternlicht,. B., “Gas-Lubricated Cylindrical Journal Bearings of the Finite Length: Part 1-Static Loading,” Trans. ASME, Journal Appl. Mech., Paper 61-APM-17 (1961).

    Google Scholar 

  14. Sternlicht, B., Poritsky, H., and Arwas, E.B., “Dynamic Stability of Cylindrical Journal Bearings Using Compressible and Incompressible Fluids,” First International Symposium on Gas-Lubricated Bearings, Washington, D.C., ONR/ACR-49, p. 119 (October, 1959 ).

    Google Scholar 

  15. Castelli, V. and Elrod, H.G., “Solution of the Stability Problem for 360 Degree Self-Acting, Gas-Lubricated Bearings,” Trans. ASME, Jnl. Basic Eng., Series D, Vol. 87, p. 199 (1965).

    Google Scholar 

  16. Cheng, H.S. and Pan, C.H.T., “Stability Analysis of Gas-Lubricated, Self-Acting, Plain, Cylindrical Journal Bearings of Finite Length, Using Galerkin’s Method,” ASEM Paper No. 64-tUBS-5 (1964).

    Google Scholar 

  17. Sternlicht, B., “On Stability of Rotors Supported by Gas Bearings,” MTI Report prepared for Rotating Machinery for Gas-Cooled Reactor Symposium, April 26, 1962.

    Google Scholar 

  18. Taniguchi, O., Tamura, A., and Ano, K., “Experimental Study of Whirl Instability for Externally Pressurized Air Journal Bearings,” Bulletin of JSME, Vol. 11, No. 43 (1968).

    Google Scholar 

  19. Larson, R.H. and Richardson, H.H., “A Preliminary Study of Whirl Instability for Pressurized Gas Bearings,” Journal of Basic Engineering, p. 511 (December, 1962)•

    Google Scholar 

  20. Kerr, J., “The Onset and Cessation of Half-Speed Whirl in Air-Lubricated Self-Pressurized Journal Bearings,” NEL Report No. 237 (1966).

    Google Scholar 

  21. Kerr, J., “The Onset and Cessation of Half-Speed Whirl in Air-Lubricated Self-Pressurized Journal Bearings,” Paper No. 22, p. 236 (1965).

    Google Scholar 

  22. Tondl, A., “The Effect of an Elastically-Suspended Foundation Mass and Its Damping on the Initiation of Self-Excited Vibrations of a Rotor Mounted in Air-Pressurized Bearings,” Gas Bearing Symposium, Paper No. 2 (1971).

    Google Scholar 

  23. Rieger, N.F., RPI, MTI “Gas-Bearings Design” Course, Section 8 of the Gas Bearing Design Manual, Vol. 1 (1966).

    Google Scholar 

  24. Wright, D.V., “Air Model Tests of Labyrinth Seal Forces on a Whirling Rotor,” Trans. ASME, Vol. 100, p. 533 (1978).

    Google Scholar 

  25. Den Hartog, J.P., “Mechanical Vibrations,” Fourth Edition, McGraw-Hill Book Co., Inc, NY (1956).

    Google Scholar 

  26. Van der Pol. Phil. Mag. Ser. 7, Vol. 5, p. 18 (1878)

    Google Scholar 

  27. Taylor, H.D., “Critical Speed Behavior of Unsymmetrical Shafts,” Trans. ASME A71, Jill. Appl. Mech. A79 (1940).

    Google Scholar 

  28. Foote, W. R., Poritsky, H., and Slade, J. J., Jr., “Critical Speeds of a Rotor with Unequal Flexibilities Mounted in Bearings of Unequal Flexibility,” Trans. ASME 84 Jnl. Appl. Mech. A77 (1945).

    Google Scholar 

  29. Kellenburger, W., “Forced, Double-Frequency, Flexural Vibrations in a Rotating Horizontal Circular Shaft,” BrownBoveri Review, 42, 3, 79 (1955).

    Google Scholar 

  30. Dimentberg, F.M., “Flexural Vibrations of Rotating Shafts,” Butterworth’s Publishing House, London (1961).

    Google Scholar 

  31. Tondl, A., “Some Problems of Rotor Dynamics,” Publishing House Czechoslovakian Academy of Sciences, Prague (1965).

    Google Scholar 

  32. Yamamoto, T., and Ota, H., “On the Unstable Vibrations of a Shaft Carrying an Unsymmetrical Rotor,” ASME Paper No. 64-APM-32 (1966).

    Google Scholar 

  33. Yamamoto, T., and Ota, H., “The Damping Effect on Unstable Whirlings of a Shaft Carrying an Unsymmetrical Rotor,” Memoirs of the Faculty of Engineering, Nagoya University, Vol. 19, No. 2 (November, 1967 ).

    Google Scholar 

  34. Yamamoto, T., and Ota, H., “On the Unstable Vibrations of a Shaft with Unsymmetrical Stiffness Carrying an Unsymmetrical Rotor,” ASME Paper No. 68-APM-N (1960).

    Google Scholar 

  35. Broniarek, C., Osinski, Z., “Pewien Przypadek Drgan Gietnych Walu Wirujacego Przy Nieliniowej Charakterystyce Materialu,” Arch. Bud. Maszyn., t. 10, 4 (1963).

    Google Scholar 

  36. Smith, D.M., “Dynamics of Rotors,” IUTAM Symposium, Lyngby, Denmark, pp. 524–565 (1974).

    Google Scholar 

  37. Lund, J.W., “Some Unstable Whirl Phenomena in Rotating Machinery,” Shock and Vibration Digest. (1978).

    Google Scholar 

  38. Alford, J.S., “Protecting Turbomachinery from Self-Excited Rotor Whirl, ” J. l. Eng. for Power, Trans. ASME 87, pp. 333–344 (1965).

    Article  Google Scholar 

  39. Lund, J.W. “Spring and Damping Coefficients for the Tilting Pad Journal Bearing”, Trans. ASLE, Vol. 7, (1964).

    Google Scholar 

Download references

Authors
  1. N. F. Rieger
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

  1. Institut für Meerestechnik, Technische Universität Hamburg-Harburg, Eissendorferstrasse 38 (Technikum), 2100, Hamburg 90, Federal Republic of Germany

    Oskar Mahrenholtz

Rights and permissions

Reprints and permissions

Copyright information

© 1984 Springer-Verlag Wien

About this chapter

Cite this chapter

Rieger, N.F. (1984). Stability of Rotors in Bearings. In: Mahrenholtz, O. (eds) Dynamics of Rotors. International Centre for Mechanical Sciences, vol 273. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2812-1_6

Download citation

  • DOI: https://doi.org/10.1007/978-3-7091-2812-1_6

  • Publisher Name: Springer, Vienna

  • Print ISBN: 978-3-211-81846-6

  • Online ISBN: 978-3-7091-2812-1

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics

Search

Navigation