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Experimental Tests and Model Based Calculations for the Diagnosis of a Crack in 320 MW Generator

  • Conference paper
Diagnostics of Rotating Machines in Power Plants

Part of the book series: International Centre for Mechanical Sciences ((CISM,volume 352))

Abstract

The paper reports the results of an extensive experimental test program for the diagnosis of a transverse crack in a generator rotor of a 320 MW steam power plant.

An adequate vibration monitoring equipment was installed on the machine in order to supply the items for the diagnosis of the malfunction.

The experimental dynamic behaviour of the rotor in-service and during the off-line tests in the factory was simulated by means of mathematical model of the rotor including the cracked effect: a satisfactory agreement was found with the experimental results.

The performed analysis strongly indicated the presence of a crack, which was later found by ultrasonic internal inspection.

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References

  1. G. Diana, N. Bachschmid, F. Angeli “An on-line crack detection method for turbogenerator rotors” Int.Conf. on Rotordynamics, Tokyo, sept. 1986, pp. 385–390.

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  2. N. Bachschmid, D. Del Vescovo “Thermal bow in an axisymmetrical shaft containing a transverse notch and related vibrational behaviour” III Int. Conf. on Rotordynamics, Lyon, sept. 1990, pp. 239–244.

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  3. S. Ghia, A. Sala “Ultrasonic examination of large forging” Int.Conf.Materials for Power Engineering Components, Cost 501, Julich-Gerany, 13–14 oct.92.

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Author information

Authors and Affiliations

  1. CISE SpA, Segrate, Italy

    G. L. Lapini & M. Zippo

  2. Technical University of Milan, Milan, Italy

    N. Bachschmid & A. Collina

  3. ENEL S.p.A. DPT-VDT-STE, Pisa, Italy

    A. Vallini

Authors
  1. G. L. Lapini
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  2. M. Zippo
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  3. N. Bachschmid
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  4. A. Collina
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  5. A. Vallini
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Editor information

Editors and Affiliations

  1. Technical University of Milan, Italy

    G. Diana

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© 1994 Springer-Verlag Wien

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Cite this paper

Lapini, G.L., Zippo, M., Bachschmid, N., Collina, A., Vallini, A. (1994). Experimental Tests and Model Based Calculations for the Diagnosis of a Crack in 320 MW Generator. In: Diana, G. (eds) Diagnostics of Rotating Machines in Power Plants. International Centre for Mechanical Sciences, vol 352. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2706-3_6

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  • DOI: https://doi.org/10.1007/978-3-7091-2706-3_6

  • Publisher Name: Springer, Vienna

  • Print ISBN: 978-3-211-82613-3

  • Online ISBN: 978-3-7091-2706-3

  • eBook Packages: Springer Book Archive

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