The Influence of Thermal Deformation on the AMB-rotor System of HTR-PM Helium Circulator
关键词:
AMBs, HTR-PM, thermal deformation, unbalanced response摘要
Helium circulator is the core component of High Temperature Reactor-Pebblebed Modules (HTRPM), and its rotor is supported by active magnetic bearings (AMBs). The windings of the motor and AMBs will generate a great deal of heat due to Ohmic loss, which increases the temperature of the circulator. The high temperature will cause the thermal deformation of AMB-rotor system, leading to the clearance change between rotor and AMBs. The AMB stiffness and inductive transducer sensitivity will be affected by the changed clearance, which decrease the stability of the AMB-rotor system. In this paper, through theoretical analysis and finite element analysis (FEA), the influence of thermal deformation on the AMB stiffness and transducer measurement is studied. The simulation and experiment for the AMB-rotor system in the circulator is carried out to explore the performance of AMB controllers and the influences of thermal deformation on the unbalanced response of the AMB-rotor system is analyzed. The theoretical calculations in this paper has general applications in the controller improvement of AMBs under clearance change and provides a reference for mechanical structure design and controller design of AMBs.
##plugins.generic.usageStats.downloads##
参考
Z. Zhang, Z. Wu, Y. Sun, and F. Li, “Design aspects of the Chinese modular high-temperature gas-cooled reactor HTR-PM,” Nuclear Engineering and Design, vol. 236, no. 5-6, pp. 485-490, Mar. 2006.
Z. Zhang and Y. Sun, “Economic potential of modular reactor nuclear power plants based on the Chinese HTR-PM project,” Nuclear Engineering & Design, vol. 237, no. 23, pp. 2265-2274, Dec. 2007.
G. Yang, Z. Shi, N. Mo, and L. Zhao, “Research on active magnetic bearing applied in Chinese modular high-temperature gas-cooled reactor,” Progress in Nuclear Energy, vol. 77, pp. 352-360, Nov. 2014.
G. Yang, Z. Shi, and N. Mo, “Technical design and engineering prototype experiment of active magnetic bearing for helium blower of HTR-PM,” Annals of Nuclear Energy, vol. 71, pp. 103-110, Sep. 2014.
Z. Sun, Y. He, J. Zhao, Z. Shi, L. Zhao, and S. Yu, “Identification of active magnetic bearing system with a flexible rotor,” Mechanical Systems & Signal Processing, vol. 49, no. 1-2, pp. 302-316, Dec. 2014.
Z. Sun, X. Yan, J. Zhao, X. Kang, G. Yang, and Z. Shi, “Dynamic behavior analysis of touchdown process in active magnetic bearing system based on a machine learning method,” Science & Technology of Nuclear Installations, vol. 2017, no. 5, pp. 1-11, Oct. 2017.
C. Zhang, Z. Yi, and Z. Zhang, “THD Analysis of high speed heavily loaded journal bearings including thermal deformation, mass conserving cavitation, and turbulent effects,” Journal of Tribology, vol. 122, no. 3, pp. 597-602, July 2000.
H. Suzuki, K. Urano, H. Kumehara, and K. Kusumoto, “Minimizing thermal deformation of ultraprecision machine tool induced by lubricating oil of hydrostatic bearings,” Journal of the Japan Society of Precision Engineering, vol. 75, no. 9, pp. 1106-1111, Sep. 2009.
K. Jiang, C. Zhu, L.Chen, and X. Qiao, “MultiDOF rotor model based measurement of stiffness and damping for active magnetic bearing using multi-frequency excitation,” Mechanical Systems & Signal Processing, vol. 60-61, pp. 358-374, Aug. 2015.
J. I. Inayat-Hussain, “Nonlinear dynamics of a statically misaligned flexible rotor in active magnetic bearings,” Communications in Nonlinear Science & Numerical Simulation, vol. 15, no. 3, pp. 764-777, Mar. 2010.
M. FeLix, A. LizaRraga, A. Islas, and A. Gonzalez, “Analysis of a ferrofluid core LVDT displacement sensor,” IECON 2010-36th Annual Conference on IEEE Industrial Electronics Society, Glendale, AZ, 2010.
A. Hossain and M. J. Dwyer, “A new type of liquid density transducer based on the principle of linear variable differential transformer,” Sensors for Industry, 2001. Proceedings of the First ISA/IEEE Conference, pp. 270-275, 2001.
J. Yu and L. Zhao, “Internal vibration source analysis of AMB-rotor system in HTR-PM primary helium circulator,” ASME. International Conference on Nuclear Engineering, London, 2018.
J. Tang, B. Xiang, and Y. Zhang, “Dynamic characteristics of the rotor in a magnetically suspended control moment gyroscope with active magnetic bearing and passive magnetic bearing,” ISA Trans, vol. 53, no. 4, pp. 1357-1365, Nov. 2014.
Y. He, Z. Shi, L. Shi, and Z. Sun, “Unbalance compensation of a full scale test rig designed for htr-10gt: a frequency-domain approach based on iterative learning control,” Science and Technology and Nuclear Installations, vol. 2017, no. 1-15, Jan. 2017.
T. Fan, Z. Sun, X. Zhang, X. Yan, J. Zhao, and Z. Shi, “Residual unbalanced mass determination of an AMBs controlled rotor based on control current analysis of the feedback loop,” ASME. International Conference on Nuclear Engineering, London, vol. 1.
