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Werner, Ulrich (2012)
Publisher: Hindawi Publishing Corporation
Journal: International Journal of Rotating Machinery
Languages: English
Types: Article
Subjects: TA1-2040, Engineering (General). Civil engineering (General), Article Subject
This paper shows a theoretical vibration analysis regarding excitation due to elliptical shaft journals in sleeve bearings of electrical motors, based on a simplified rotordynamic model. It is shown that elliptical shaft journals lead to kinematic constraints regarding the movement of the shaft journals on the oil film of the sleeve bearings and therefore to an excitation of the rotordynamic system. The solution of the linear differential equation system leads to the mathematical description of the movement of the rotor mass, the shaft journals, and the sleeve bearing housings. Additionally the relative movements between the shaft journals and the bearing housings are deduced, as well as the bearing housing vibration velocities. The presented simplified rotordynamic model can also be applied to rotating machines, other than electrical machines. In this case, only the electromagnetic spring value cm has to be put to zero.
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    • Friswell, M. I., Penny, J. E. T., Garvey, S. D., Lees, A. W.. Dynamics of Rotating Machines. 2010
    • Maurice, L., Adams, J. R.. Rotating Machinery Vibration. 2010
    • Vance, J. M., Zeidan, F. J., Murphy, B.. Machinery Vibration and Rotordynamics. 2010
    • Rao, J. S.. Rotor Dynamics. 1996
    • Gasch, R., Nordmann, R., Pfützner, H.. Rotordynamik. 2002
    • Kliem, W., Pommer, C., Stoustrup, J.. Stability of rotor systems: a complex modelling approach. Zeitschrift fur Angewandte Mathematik und Physik. 1998; 49 (4): 644-655
    • Dorrell, D. G.. Experimental behaviour of unbalanced magnetic pull in 3-phase induction motors with eccentric rotors and the relationship with tooth saturation. IEEE Transactions on Energy Conversion. 1999; 14 (3): 304-309
    • Smith, A. C., Dorrell, D. G.. Calculation and measurement of unbalanced magnetic pull in cage induction motors with eccentric rotors. I. Analytical model. IEE Proceedings: Electric Power Applications. 1996; 143 (3): 193-201
    • Schuisky, W.. Magnetic pull in electrical machines due to the eccentricity of the rotor. Electricity Research Association Transaction. 1972; 295: 391-399
    • Holopainen, T. P.. Electromechanical interaction in rotor dynamics of cage induction motors, Ph.D. thesis. 2004
    • Arkkio, A., Antila, M., Pokki, K., Simon, A., Lantto, E.. Electromagnetic force on a whirling cage rotor. IEE Proceedings: Electric Power Applications. 2000; 147 (5): 353-360
    • Belmans, R., Vandenput, A., Geysen, W.. Calculation of the flux density and the unbalanced pull in two pole induction machines. Archiv für Elektrotechnik. 1987; 70 (3): 151-161
    • Stoll, R. L.. Simple computational model for calculating the unbalanced magnetic pull on a two-pole turbogenerator rotor due to eccentricity. IEE Proceedings: Electric Power Applications. 1997; 144 (4): 263-270
    • Werner, U.. Rotordynamische analyze von asynchronmaschinen mit magnetischen unsymmetrien, dissertation. 2006
    • Werner, U.. Mathematical analysis of rotor shaft displacements in asynchronous machines; a critical speed or just a rotation of the orbit axis?. ZAMM Zeitschrift fur Angewandte Mathematik und Mechanik. 2009; 89 (7): 514-535
    • IEC 60034-14, null.
    • ANSI /API 541, null.
    • Reynolds, O.. On the theory of lubrication. Philosophical Transaction of the Royal Society. 1886; 177: 157-234
    • Gnanadoss, A. A., Osborne, M. R.. The numerical solution of reynolds' equation for a journal bearing. Quarterly Journal of Mechanics and Applied Mathematics. 1964; 17 (2): 241-246
    • Glienicke, J.. Feder- und dämpfungskonstanten von gleitlagern für turbomaschinen und deren einfluss auf das schwingungsverhalten eines einfachen rotors, dissertation. 1966
    • Lund, J., Thomsen, K.. A calculation method and data for the dynamics of oil lubricated journal bearings. Topics in Fluid Film Bearing and Rotor Bearing System Design and Optimization. 1978: 1-28
    • Tondl, A.. Some Problems of Rotor Dynamics. 1965
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