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Seal Properties

  • R. Nordmann
Part of the International Centre for Mechanical Sciences book series (CISM, volume 297)

Abstract

Hydraulic forces in annular seals may have a large influence on the vibrations of high speed centrifugal pumps. To have a better knowledge about such seal effects, theoretical as well as experimental studies are important in the actual research of rotordynamics. In this chapter a theoretical model and an identification procedure are presented to determine the dynamic coefficients of seals by calculation and measurements as well. The identified parameters confirm the assumptions in modelling and point out, that the stiffness and damping characteristics of seals are significant for the stability behavior of pumps.

Keywords

Frequency Response Function Leakage Flow Fluid Element Dynamic Coefficient Circumferential Velocity 
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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    Hirs, G.G.: “Fundamentals of a bulk-flow theory for turbulent lubricant films”; Diss. TH Delft, Niederlande, 1970.Google Scholar
  2. /2/.
    Childs, D.W.: “Finite-Length solution for rotordynamic coefficients of turbulent annular seals”; ASME 82-Lub-142.Google Scholar
  3. /3/.
    Nordmann, R. et. al: “Rotordynamic Coefficients and Leakage Flow for Smooth and Grooved Seals in Turbopumps”; IFTOMM-Conference Proceedings, Tokyo 1986.Google Scholar
  4. /4/.
    Black, H.F.: “Effects of hydraulic forces in annular pressure seals on the vibrations of centrifugal pump rotors”; J. Mech. Eng. Sci., Vol 11, No 2, 1969, S. 206–213.CrossRefMathSciNetGoogle Scholar
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    Childs, D.W.: “Dynamic analysis of turbulent annular seals based on Hirs’ lubrication equation”; ASME 82-Lub-41.Google Scholar
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    Maßmann, H.: “Ermittlung der dynamischen Parameter turbulent durchströmter Ringspalte bei inkompressiblen Medien”; Diss. Universität Kaiserslautern 1986.Google Scholar

Copyright information

© Springer-Verlag Wien 1988

Authors and Affiliations

  • R. Nordmann
    • 1
  1. 1.University of KaiserslauternKaiserslauternGermany

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