Abstract
This paper presents a simulation model for the dropdown of a high-speed electric motor utilizing the active magnetic bearings (AMB). In the circumstance that there is not a sufficient electromagnetic field or the system experiences excessive load, the rotor drops instantly on the backup bearings. The dropdown is accompanied by a considerable friction between the surfaces of the rotor and backup bearings. This study evaluates the heat generation and thermal behavior of backup bearing that are essential for the design of AMB systems. The model enables to calculate the power loss resulted from the friction between the rotor and backup bearing. The simulation includes the FE-model of the rotor and the backup bearing model. The one-dimensional thermal network has been applied to the thermal model of the bearing. The study concentrates on evaluating the friction heat generated and thermal growth of the deep groove ball bearing type in the non-drive end of the motor.
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References
Kärkkäinen, A., Sopanen, J., Mikkola, A.: Dynamic simulation of a flexible rotor during drop on retainer bearings. J. Sound Vib. 306, 601–617 (2007)
Ecker, H.: Nonlinear stability analysis of a single mass rotor contacting a rigid backup bearing. In: Proceedings of the Euromech Collaquium, pp. 79–88, Loughborough, UK (1998)
Schmied, J., Pradetto, J.C.: Behaviour of a one ton compressor rotor being dropped into the auxiliary bearings. In: Proceeding of the Third International Symposium on Magnetic Bearings, Alexandria, pp. 145–156 (1992)
Keogh, P.S.: Contact dynamic phenomena in rotating machines: active/passive considerations. Mech. Syst. Signal Process. 29, 19–33 (2012)
Keogh, P.S., Yong, W.Y.: Thermal assessment of dynamic rotor/auxiliary bearing contact events. ASME J. Tribol. 129, 143–152 (2007)
Burton, R.A., Staph, H.E.: Thermally activated seizure of angular contact bearings. Tribol. Trans. 10, 408–417 (1967)
Takabi, J., Khonsari, M.M.: On the thermally-induced failure of rolling element bearings. Tribol. Int. 94, 661–674 (2016)
Sun, G.: Rotor drop and following thermal growth simulations using detailed auxiliary bearing and damper models. J. Sound Vib. 289, 334–359 (2006)
Jin, C., Zhu, Y., Xu, L., Xu, Y., Zheng, Y.: The thermodynamic properties of a new type catcher bearing used in active magnetic bearings system. Appl. Therm. Eng. 82, 253–263 (2015)
Zhao, Y., Yang, G., Shi, Z., Zhao, L.: Thermal analysis and simulation of auxiliary bearings and its application in the high temperature reactor-10. J. Tribol. 138, (2016)
Zheng, D., Chen, W.: Thermal performances on angular contact ball bearing of high-speed spindle considering structural constraints under oil-air lubrication. Tribol. Int. 109, 593–601 (2017)
Jin, C., Wu, B., Hu, Y.: Heat generation modeling of ball bearing based on internal load distribution. Tribol. Int. 45, 8–15 (2012)
Zahedi, A., Movahhedy, M.R.: Thermo-mechanical modeling of high speed spindles. Scientia Iranica 19, 282–293 (2012)
Flouros, M.: Correlations for heat generation and outer ring temperature of high speed and highly loaded ball bearings in an aero-engine. Aerosp. Sci. Technol. 10, 611–617 (2006)
Ma, F., Li, Z., Qiu, S., Wu, B., An, Q.: Transient thermal analysis of grease-lubricated spherical roller bearings. Tribol. Int. 93, 115–123 (2016)
Kärkkäinen, A.: Dynamic simulations of rotors during drop on retainer bearings. Ph.D. thesis, Lappeenranta University of Technology, Finland (2007)
Halminen, O.: Multibody models for examination of touchdown bearing systems. Ph.D. thesis, Lappeenranta University of Technology, Finland (2016)
Sopanen, J., Mikkola, A.: Dynamic model of a deep-groove ball bearing including localized and distributed defects. Part 1: Theory. In: Proceedings of the Institution of Mechanical Engineers Part, K Journal of Multi-body Dynamics, vol. 217, pp. 201–211(2003)
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Neisi, N., Sikanen, E., Heikkinen, J.E., Sillanpää, T., Sopanen, J. (2019). Power Loss and Temperature Growth in the Backup Bearing of AMB-Supported High-Speed Electric Motor During a Dropdown. In: Cavalca, K., Weber, H. (eds) Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM. IFToMM 2018. Mechanisms and Machine Science, vol 60. Springer, Cham. https://doi.org/10.1007/978-3-319-99262-4_11
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DOI: https://doi.org/10.1007/978-3-319-99262-4_11
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