Artículos de revistas
Control System Design For Active Lubrication With Theoretical And Experimental Examples
Registro en:
Journal Of Engineering For Gas Turbines And Power. , v. 125, n. 1, p. 75 - 80, 2003.
7424795
10.1115/1.1451757
2-s2.0-0037252101
Autor
Santos I.F.
Scalabrin A.
Institución
Resumen
This work focuses on the theoretical and experimental behavior of rigid rotors controlled by tilting-pad journal bearings with active oil injection. Initially the mathematical model of the active bearing is presented: The equations that describe the dynamics of hydraulic actuators are introduced into the equations of the lubricant, resulting in a new form of Reynolds' equation for active lubrication. The global model of the system is obtained by coupling the equation of motion of the rigid rotor with the stiffness and damping of the active oil film. This global model is then used to design the control system of the active bearing based on root locus curves. The active system stability is analyzed by calculating its eigenvalues and frequency response curves. The theoretical and experimental results show that this kind of bearing can significantly reduce the vibration level of rotating machinery. Copyright © 2003 by ASME. 125 1 75 80 Mohan, S., Hahn, E.J., "Design of Squeeze Film Damper Supports for Rigid Rotors" (1974) ASME J. Eng. Ind., 96 (3), p. 976 Shiau, T.N., Rao, J.S., Chang, J.R., Choi, S.T., "Dynamic Behavior of Geared Rotors" (1999) ASME J. Eng. Gas Turbines Power, 121, pp. 494-503 Ulbrich, H., Althaus, J., "Actuator Design for Rotor Control" (1989) 12th Biennial ASME Conference on Vibration and Noise, 1, pp. 17-22. , ASME, New York Santos, I.F., Ulbrich, H., "Actively Controlled Tilting Pad Journal Bearings" (1992) ISROMAC - The International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, 2, pp. 423-431. , Honolulu Santos, I.F., (1993) Aktive Kippsegmentlagerung - Theorie und Experiment (Schwingungstechnik, 189), , VDI-Verlag, Dusseldorf Santos, I.F., "On the Adjusting of the Dynamic Coefficients of Tilting-Pad Journal Bearings" (1995) STLE Tribol. Trans., 38 (3), pp. 700-706 Santos, I.F., "Design and Evaluation of Two Types of Active Tilting-Pad Journal Bearings" (1994) IUTAM Symposium on Active Control of Vibration, pp. 79-87. , Bath, England Santos, I.F., "Strategien für die Erhöhung der Dämpfungsreserve von kippsegmentgelagerten Rotorsystemen" (1995) Schwingungen in Rotierenden Maschinen, 3, pp. 3-12 Santos, I.F., Russo, F.H., 'Tilting-Pad Journal Bearings with Electronic Radial Oil Injection' (1998) ASME J. Tribol., 120, pp. 583-594 Santos, I.F., Nicoletti, R., 'THD Analysis in Tilting-Pad Journal Bearings Using Multiple Orifice Hybrid Lubrication' (1999) ASME J. Tribol., 121, pp. 892-900 Bently, D.E., Grant, J.W., Hanifan, P., "Active Control Fluid Bearings for a New Generation of Machine" (1999) Orbits, Second/Third Quarters, 20 (2), pp. 15-20 El-Shafei, A., Hathout, J.P., "Development and Control of HSFDs for Active Control of Rotor-Bearing Systems" (1995) ASME J. Eng. Gas Turbines Power, 117, pp. 757-766 Ulbrich, H., "Haben aktive Lagerungen Zukunft?" (1993) Schwingungen in Rotierenden Maschinen, 2, pp. 18-27. , Vieweg Verlag Ulbrich, H., "Active Vibration Control of Rotors" (1998) Fifth International IFToMM Conference on Rotor Dynamics, pp. 16-31. , Vieweg Verlag, Braunschweig Scalabrin, A., "Utilização de Mancais Segmentados com Injeç ão Electrǒnica para Controle de Rotores - Teoria e Experiment" (1999), Master thesis, Department of Mechanical Design, State University of Campinas, Brazil