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Residual Unbalance Determination for Flexible Rotors at Operational Speed

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Proceedings of the 9th IFToMM International Conference on Rotor Dynamics

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 21))

Abstract

According to ISO 11342 the determination of residual unbalances of flexible rotors, e.g. turbine- and generator-rotors for power plants is based on a modal approach. It delivers good estimations for the residual modal unbalance close to critical speeds. However, the majority of flexible rotors are operated at speeds out of a resonance, where ISO 11342 does not provide a procedure or a criterion to estimate the balancing quality. This is in contradiction to customer demands, who often require a proof of the balancing quality particularly at this operating speed. In this paper a procedure is presented, how to estimate the residual unbalance for the operating speed as well.

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References

  1. ISO11342 (1998) Mechanical vibration—methods and criteria for the mechanical balancing of flexible rotors

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  2. L’vov M (2012) Use of modal weight sets for the residual modal unbalance of high speed balance of flexible rotors. In: 10th International conference on vibrations in rotating machinery, 11–13 September 2012, Imeche London, UK

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  3. Kellenberger W (1987) Elastisches Wuchten, Springer, Berlin, ISBN-13: 978-3642829314

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  4. ISO1940-1 (2004) Mechanical vibration—balance quality requirements for rotors in a constant (rigid) state—part 1: specification and verification of balance tolerances

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Author information

Authors and Affiliations

  1. ALSTOM (Switzerland) Ltd, Brown Boveri Strasse 7, Baden, Switzerland

    Eric Knopf, Thomas Krüger & Rainer Nordmann

Authors
  1. Eric Knopf
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  2. Thomas Krüger
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  3. Rainer Nordmann
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Corresponding author

Correspondence to Eric Knopf .

Editor information

Editors and Affiliations

  1. Mechanical Engineering, Politecnico di Milano, Milano, Italy

    Paolo Pennacchi

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© 2015 Springer International Publishing Switzerland

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Knopf, E., Krüger, T., Nordmann, R. (2015). Residual Unbalance Determination for Flexible Rotors at Operational Speed. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_62

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  • DOI: https://doi.org/10.1007/978-3-319-06590-8_62

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-06589-2

  • Online ISBN: 978-3-319-06590-8

  • eBook Packages: EngineeringEngineering (R0)

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