Abstract
For turbo refrigerant compressor, oil-free bearing has merits that the continuous operation is possible because the lubrication system is not required and the refrigerant is not contaminated by the oil. Magnetic bearing is one of oil-free bearing and recently it started to be applied to a few turbo refrigerant compressors because of easy maintenance thanks to no friction and no wear in bearing. 200RT class turbo refrigerant compressor using oil-free bearing is under development after finishing the development of 145RT compressor. This paper presents the design modification from 145RT compressor and design procedure of hybrid thrust magnetic bearing using both of permanent magnet and electromagnet. Thrust magnetic bearing are designed to support 2,000N thrust force by compressor at 18,000rpm operating speed. The controller for magnetic bearing was designed and the rotordynamic analysis such as critical speed, and unbalance response in case that the rotor is supported by magnetic bearings are simulated by using finite-element method.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Park, C.H., Choi, S.K., Park, J.Y., Yun, D.W.: Design of hybrid magnetic bearings for turbo refrigerant compressor. In: Proc. 17th International Congress on Sound & Vibration, pp. 1–8 (2010)
Allaire, P.E., Maslen, E.H., Humphris, R.R., Sortore, C.K., Studer, P.A.: Low power magnetic bearing design for high speed rotating machinery. In: Proceedings of the NASA International Symposium on Magnetic Suspension, pp. 317–329 (1992)
Rao, J.S., Tiwari, R.: Design optimization of double-acting hybrid magnetic thrust bearings with control integration using multi-objective evolutionary algorithms. Mechatronics 19, 945–964 (2009)
Morales, W., Fusaro, R.: “Permanent magnetic bearing for spacecraft applications”, NASA/TM-2003-211996/REV1
TURBOCOR INC., “Device to relieve thrust load in a rotor-bearing system using permanent magnets”, PCT patent, 2004007984
Lee, A.C., Hsiao, F.Z., Ko, D.: Analysis and testing of magnetic bearing with permanent magnets for bias. JSME International Journal Series C 37, 774–782 (1994)
Lee, A.C., Hsiao, F.Z., Ko, D.: Performance limits of permanent-magnet-biased magnetic bearings. JSME International Journal Series C 37, 783–794 (1994)
Maslen, E.H., Allaire, P.E., Noh, M.D., Sortore, C.K.: Magnetic bearing design for reduced power consumption. Journal of Tribology 118, 839–846 (1996)
Fan, Y.H., Lee, A.C.: Design of a permanent/electromagnetic magnetic bearing-controlled rotor system. Journal of the Franklin Institute 334B, 337–356 (1997)
Yoo, S.Y., Park, C.H., Choi, S.K., Noh, M.K.: Flexible rotor modelling for a large capacity flywheel energy storage system. In: Proceedings of 11th International Symposium on Magnetic Bearing 2008, Nara, Japan, pp. 238–242 (2008)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Park, C.H., Choi, S.K. (2013). Design of Rotor and Magnetic Bearings for 200RT Class Turbo Refrigerant Compressor. In: Kim, JH., Matson, E., Myung, H., Xu, P. (eds) Robot Intelligence Technology and Applications 2012. Advances in Intelligent Systems and Computing, vol 208. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37374-9_91
Download citation
DOI: https://doi.org/10.1007/978-3-642-37374-9_91
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-37373-2
Online ISBN: 978-3-642-37374-9
eBook Packages: EngineeringEngineering (R0)