Stiffness and damping coefficients of 8-lobe journal bearings

• Autorzy: Strzelecki Stanislaw

Identyfikatory

DOI

10.21008/j.0860-6897.2020.3.21

• Języki publikacji: EN

Abstrakty

EN

High-speed rotating machinery, such as steam turbines, turbo-compressors, pumps, turbo pumps, accelerating gearboxes contain multilobe journal bearings. The bearings with 8 lobes are applied in bearing system of grinding spindle. The reasons for the application of such bearings are not too high temperatures of bearing operation and specific static and dynamic characteristics. Stiffness and damping coefficients of 8-lobe journal bearings with cylindrical and multilobe profile of lobes were calculated by means of perturbation method. Different values of bearing length to diameter ratio, relative clearance and lobe 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 and aligned orientation of journal in the bearing were considered.

Słowa kluczowe

EN

multilobe journal bearing; dynamic characteristic

PL

wielopowierzchniowe łożyska ślizgowe; charakterystyka dynamiczna

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2020
• Tom: Vol. 31, nr 3
• Strony: art. no. 2020321
• Opis fizyczny: Bibliogr. 11 poz., 1 fot. kolor., rys., wykr.

Twórcy

autor

Strzelecki Stanislaw

Bibliografia

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• 2. O. Pinkus, Thermal Aspects of Fluid Film Tribology, ASME, New York, 1990.
• 3. 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.
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• 5. J. Koch, J. Ilczyszyn, J. Krzyżanowski, Spindles of machine tools. Scientific Technical Publishing House, Warsaw (1982) (in Polish)
• 6. S. Strzelecki, Z. Socha, Operating temperatures of the bearing system of grinding spindle. Tribologia 236(2) (2011) 157 - 167.
• 7. S. Strzelecki, Maximum oil film temperature of the 4-lobe journal bearing with the lobes of small angular length. Tribologia 275(5) (2017) 87-92.
• 8. S. Strzelecki, H. Kapusta, Maximum oil film temperature of 8-lobe journal bearing. Proc. of the International Scientific- Technical Conference on Tribology, URAL-TRIBO, 8-12 September 2014. Tschelabinsk, Russia, (2014) 18-24.
• 9. S. Strzelecki, Effect of Bore Profile on the Static and Dynamic Characteristics of 6-Lobe Journal Bearing, Proceedings of 2nd International Symposium on Stability Control of Rotating Machinery, Gdańsk, Poland, (2003) 140-149.
• 10. S. Strzelecki, Static and dynamic characteristics of 8-lobe journal bearing, Proc. of Vth International Symposium INTERTRIBO'96, High Tatra, Stara Lesna, Slovakia. (1996) 212-215.
• 11. S. Strzelecki, Z. Towarek, Stability of rotor operating in cylindrical 3-pocket journal bearings, Vibrations in Physical Systems, 24 (2010) 385-392.

Uwagi

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