Effect of pad offset on the stability of Jeffcott rotor operating in tilting 4-pad journal bearings

• Autorzy: Strzelecki S. , Socha Z. , Towarek Z. , Zakrzewski S.
• Konferencja: Symposium “Vibrations In Physical Systems” (26 ; 04-08.05.2014 ; Będlewo koło Poznania ; Polska)
• Języki publikacji: EN

Abstrakty

EN

Tilting-pad journal bearings are applied in high-speed rotor systems. Excellent stability properties allow obtaining the reliable, vibration free, operation of bearings and rotor. There is still need for better knowledge of such bearings static and dynamic characteristics. In case of tilting-pad journal bearings the stability can be evaluated by the system damping. The system damping gives the damping reserve of the bearings-rotor system and can be obtained by the solution of basic hydrodynamic and rotor motion equations. In this paper the hydrodynamic equations were solved by means of finite difference method. As result, the dynamic characteristics of bearings in form of stiffness and damping coefficients were obtained. These coefficients were the basis for the determination of the system damping.

Słowa kluczowe

EN

tilting-pad journal bearings; stability of rotor

PL

łożysko ślizgowe segmentowe; stateczność rotoru

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2014
• Tom: Vol. 26
• Strony: 273--280
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Strzelecki S.

• Research Development Institute of Textile Machinery “POLMATEX-CENARO”, Wolczańska 55/591/15, 90-924 Lodz, Poland

autor

Socha Z.

• Research Development Institute of Textile Machinery “POLMATEX-CENARO”, Wolczańska 55/591/15, 90-924 Lodz, Poland

autor

Towarek Z.

• Lodz University of Technology, Stefanowskiego 1/15, 90-924 Łódź, Poland

autor

Zakrzewski S.

• Lodz University of Technology, Stefanowskiego 1/15, 90-924 Łódź, Poland

Bibliografia

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• 2. R. Gasch, H. Pfützner, Rotordynamik. Springer -Verlag. 1975
• 3. R. Klumpp, Ein Beitrag zur Theorie von Kippsegmentlagern. Dissertation, Technische Universität Karlsruhe. 1975.
• 4. F. Walle, Unwuchtschwingungen und Systemdämpfung gleitgelagerter Rotoren unter praxisnahen Bedingungen. Ph. D. Thesis. University Karlsruhe. Karlsruhe 1975.
• 5. D.C. Han, Statische und dynamische Eigenschaften von Gleitlagern bei hohen Umfangsgeschwindigkeiten und bei Verkantung. Dissertation. Karlsruhe. 1979.
• 6. S. Strzelecki, G.C.Jr. Brito, Dynamics of Tilting Pad Journal Bearings of Large Overall Dimensions Applied in Hydro Generating Units. Encontro Nacional de Monitoramento. Proceedings of the III ENAM. 29.10 – 03.11.2006. Foz de Iguasu. PR - Brasil. 1-12.
• 7. S. Strzelecki, S.M. Ghoneam, Z. Towarek, Stability of Tilting 7. 5-Pad Journal Bearing. Proceedings of the ISCORMA-4. Calgary 27-31.08. Canada. 2007.
• 8. S. Strzelecki, Z. Towarek, Stability of rotor operating in multilobe or tilting-pad journal bearings. 10th Conference on DYNAMICAL SYSTEMS. THEORY AND APPLICATIONS. December 7-10, 2009, Łódź, Poland. Proceedings Vol. 1. 473-480.
• 9. S. Strzelecki, S.M. Ghoneam, Static characteristics of tilting 3-pad journal bearing. INTERTRIBO 2009 (October 21-23.2009, Slovak Republik). Proc. of the Conference. 52-55.
• 10. S. Strzelecki, H. Kapusta, Effect of Pivot Offset on the Oil Film Temperature Distribution in the Tilting 5-Pad Journal Bearing. 14th International Colloquium Tribology, January 13-15, 2004. Germany. 971-976
• 11. S. Strzelecki, Effect of pivot location on the maximum oil film temperature of tilting 5-pad journal bearing. IX International Symposium INTERTRIBO 2006. October 11-13, Vysoke Tatry Stara Lesna. 2006.