Dynamic characteristics and stability of high speed cylindrical journal bearing

• Autorzy: Strzelecki S.
• Języki publikacji: EN

Abstrakty

EN

The operation of plain circular journal bearing at high speed is restricted by the excessive temperature that is generated in the oil film and by the loss of stability. Low costs of machining, high-transmitted loads are the advantages of these types of bearings. Better knowledge of bearing operation and its stability from the point of hydrodynamic theory of lubrication and theory of vibration can be affected by modifications of bearing design. These modifications should result in the higher speeds of operation, decrease in power losses and better bearing stability. The basis of stability determination is the dynamic characteristics of bearing. For the plain circular journal bearing the dynamic characteristics has been calculated. Stability of high speed, symmetric rotor was determined, too. Different values of bearing length to diameter ratio, and relative clearance were assumed. Reynolds', energy and viscosity equations were solved by means of iterative procedure. Adiabatic oil film, laminar flow in the bearing gap as well as aligned orientation of journal in the bearing was considered.

Słowa kluczowe

EN

cylindrical journal bearing; dynamic characteristics; stability

PL

walcowe łożysko ślizgowe; charakterystyka aerodynamiczna; stabilność

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2018
• Tom: Vol. 29
• Strony: art. no. 2018025
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Strzelecki S.

Bibliografia

• 1. T. Someya, Stabilität einer in zylindrischen Gleitlagern laufenden, unwuchtfreien Welle-Beitrag zur Theorie des instationär belasteten Gleitlagers, Diss. Techn. Universität Karlsruhe, 1962.
• 2. J. Glienicke, Feder- und Dämpfungskonstanten von Gleitlagern für Turbomaschinen und deren Einfluß auf das Schwingungsverhalten eines einfachen Rotors, Diss. Techn. Universität Karlsruhe, 1962.
• 3. R. Gasch, H. Pfützner, Rotordynamik, Springer-Verlag, 1975.
• 4. T. Zielinski, Vibration and stability of elastic rotor operating in journal bearings, Ph. D. Thesis, Lodz University of Technology, 1969.
• 5. D. Dettmar, S. Kühl, B. Lüneburg, M. Medhioub, U. Mermertas, E. Schüler, H. Schwarze, D. Thomas, E. G. Welp, Advancement of a radial journal bearing for highest load capacity for big steam turbines for power generation, 7th IFToMM- Conference on Rotor Dynamics, September 25-28, 2006, Vienna, Austria.
• 6. S. Strzelecki, H. Kapusta, Z. Socha, Effect of side sealing on the static characteristics of 2-lobe journal bearing, XIX Int. Conf. Naukowo-Techniczna TEMAG, Gliwice-Ustroń, (2011) 59 - 69.
• 7. S. Strzelecki, Thermal performance of 3-lobe journal bearing operating at turbulent oil film, Nordtrib’2002, Stockholm, Sweden, 2002.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).