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The relevance of the dynamic behaviour of the supporting structure in calculating critical speeds of multistage centrifugal pumps with interstage seals

  • N. Bachschmid
  • K. L. Cavalca
  • F. Cheli
Conference paper

Abstract

The dynamic behaviour of a six-stage centrifugal pump rotor is calculated with different models of the supporting structure. The differences in the obtained results show that an accurate modelling of the supporting structure is necessary if the dynamic properties of the seals are considered.

Keywords

Frequency Response Mode Shape Supporting Structure Centrifugal Pump Critical Speed 
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.

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References

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    Nordmann R., “Seal properties”, Rotordynamics 2 — Problems in turbomachinery, Springer Verlag, 1988, pp.153–173.Google Scholar
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    Black H.F., “Effects of hydraulic forces in anular pressure seals on the vibrations of centrifugal pump rotor”, JMES, Vol.II, N.2, 1969, pp.206–213.Google Scholar
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    Childs D.W. “Finite length solutions for rotordynamic coefficients of turbulent anular seals”, ASME 82-Lub-42.Google Scholar
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    Bachschmid N., Pizzigoni B., DiPasquantonio F., “A method for investigating the dynamic behaviour of a turbomachinery shaft on a foundation”, ASME paper 77-DET-16, DET Conference, Chicago (USA), Sept. 1977.Google Scholar
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    Allaire P.F., Lee C.C., Gunter E.J., “Dynamics of short excentric plain seals with high axial Reynolds number”, Journal of Spacecraft and Rockets, Vol.15, N.6, Nov–Dec 1978, pp.342–347.CrossRefGoogle Scholar
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    Cheli F., Lucchesi Cavalca K., Dedini F., Vania A., “Dynamical behaviour analysis of rotor structure systems by a modal truncation method”, 9th International Modal Analysis Conference IMAC, Florence, 1991.Google Scholar

Copyright information

© Springer-Verlag London Limited 1992

Authors and Affiliations

  • N. Bachschmid
    • 1
  • K. L. Cavalca
    • 1
  • F. Cheli
    • 1
  1. 1.Dipartimento di MeccanicaPolitecnico di MilanoItaly

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