State-of-the-art rotordynamic analyses of pumps

• Autorzy: Gaulard Frédéric , Schmied Joachim , Fuchs Andreas

Identyfikatory

DOI

10.24425/bpasts.2021.139316

• Języki publikacji: EN

Abstrakty

EN

State-of-the-art analyses for the rotordynamic assessment of pumps and specific requirements for the simulation tools are described. Examples are a horizontal multistage pump with two fluid film bearings in atmospheric pressure, a horizontal submerged multistage pump with many bearings, and a submerged vertical single-stage pump with water-lubricated bearings. The rotor of the horizontal pump on two bearings is statically overdetermined by the seals and the static bearing forces depend on the deflection in the seals and the bearings. The nonlinear force-displacement relation in the bearings is considered in this paper. The stability of pumps is assessed by Campbell diagrams considering linear seal and bearing properties. Cylindrical bearings can have a destabilizing effect in the case of low loads as in the examples of the submerged pumps. For the pump with many bearings, the influence of the bearing ambient pressure and the bearing specific load on the stability is analyzed. For the vertical pump, the limit cycle, i.e. the vibration level of stabilization, is determined with a nonlinear analysis. All examples have a practical background from engineering work, although they do not exactly correspond to real cases. Analyses were performed with the rotordynamic software MADYN 2000.

Słowa kluczowe

EN

rotordynamics; lateral analysis; pump; fluid-film bearing; pump seal; nonlinear analysis

PL

dynamika wirnika; pompa; uszczelnienie pompy; analiza nieliniowa

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2021
• Tom: Vol. 69, nr 6
• Strony: art. no. e139316
• Opis fizyczny: Bibliogr. 9 poz., il., wykr.

Twórcy

autor

Gaulard Frédéric

• Delta JS AG, Technoparkstrasse 1, 8005 Zürich, Switzerland

autor

Schmied Joachim

• Delta JS AG, Technoparkstrasse 1, 8005 Zürich, Switzerland

autor

Fuchs Andreas

• Delta JS AG, Technoparkstrasse 1, 8005 Zürich, Switzerland

Bibliografia

• [1] D. Childs, Turbomachinery Rotordynamics, New York, Chichester, Brisbane, Toronto, Singapore: Wiley Inter Science Publication, 1993.
• [2] J. Glienicke, “Feder- und Dämpfungskonstanten von Gleitlagern für Turbomaschinen und deren Einfluss auf das Schwingungsverhalten eines einfachen Rotors,” Dissertation, Technische Hochschule Karlsruhe, 1966.
• [3] J. Lund and K. Thomsen, “A Calculation Method and Data for the Dynamic Coefficients of Oil Lubricated Journal Bearings,” in Topics in Fluid Film Bearing and Rotor Bearing System Design and Optimization. New York: ASME, 1978, pp. 1–28.
• [4] X. Cheng, “Einfluss einer Schmierfilmkavitation auf die dynamischen Eigenschaften von Quetschöldämpfern,” Fortschr.-Ber. VDI Reihe 1 no. 243, Düsseldorf, VDI-Verlag.
• [5] A. Fuchs, J. Schmied, and A. Kosenkov, “Hydrodynamic Bearings – State of the Art Calculations,” in Proceedings of the 11th Conference on Vibrations in Rotating Machines (SIRM), Magdeburg, Germany, 2015.
• [6] R. Nordmann and F.J. Dietzen, “Calculating Rotordynamic Coefficients of Seals by Finite-Difference Techniques,” ASME J. Tribol., vol. 109, pp. 388–394, July 1987.
• [7] J. Schmied, “Application of MADYN 2000 to rotor dynamic problems of industrial machinery,” in Proceedings of the 13th International Conference on Dynamics of Rotating Machines (SIRM), Copenhagen, Denmark, 2019.
• [8] American Petroleum Institute, “Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries – ANSI/API Standard 610,” Eleventh Edition, September 2010.
• [9] J. Schmied and A. Fuchs, “Nonlinear Analyses in Rotordynamic Engineering,” in Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM, 2019, vol. 3, pp. 426‒442.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).