Abstract
An important assumption for the reliability of high speed centrifugal pumps is a good rotordynamic behavior. Connected to this problem hydraulic forces acting on the rotor are of major importance. It is well known that neck ring seals as well as interstage seals (Fig. 1) may have a large influence on the bending vibrations of a pump rotor. Besides their designed function of reducing the leakage flow between the impeller outlet and inlet or between two adjacent pump stages, the contactless seals have the potential to develop significant forces. This type of forces, created by lateral rotor vibrations can be described by a linear model with stiffness, damping and inertia coefficients.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Hirs, G.G.: “Fundamentals of a bulk-flow theory for turbulent lubricant films”; Diss. TH Delft, Niederlande, 1970.
Childs, D.W.: “Finite-Length solution for rotordynamic coefficients of turbulent annular seals”; ASME 82-Lub-42.
Nordmann, R. et. al: “Rotordynamic Coefficients and Leakage Flow for Smooth and Grooved Seals in Turbopumps”; IFTOMMConference Proceedings, Tokyo 1986.
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.
Childs, D.W.: “Dynamic analysis of turbulent annular seals based on Hirs’ lubrication equation”; ASME 82-Lub-41.
Maßmann, H, H.: “Ermittlung der dynamischen Parameter turbulent durchströmter Ringspalte bei inkompressiblen Medien”; Diss. Universität Kaiserslautern 1986.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1988 Springer-Verlag Wien
About this chapter
Cite this chapter
Nordmann, R. (1988). Identification of Stiffness, Damping and Inertia Coefficients of Annular Turbulent Seals. In: Natke, H.G. (eds) Application of System Identification in Engineering. International Centre for Mechanical Sciences, vol 296. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2628-8_17
Download citation
DOI: https://doi.org/10.1007/978-3-7091-2628-8_17
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-82052-0
Online ISBN: 978-3-7091-2628-8
eBook Packages: Springer Book Archive