以10kW，120,000r/min的超高速永磁同步电机为实验样机，对三瓦双向箔片轴承-电机转子系统动力学行为进行实验研究。分析了三瓦双向箔片轴承的承载特点，在对轴承刚度和阻尼系数适当简化的基础上，计算了弹性支撑时的转子锥动模态频率和平动模态频率。在样机上进行了30,000r/min, 60,000r/min的升速实验和 90,000r/min的自由降速实验。实验表明：转子的起飞转速约为4,000r/min，当转子工作在90,000r/min时，伴随着强烈的亚同步涡动频率，而且该亚同步涡动频率完全是由轴承-转子系统本身所引起。结果显示三瓦双向箔片轴承-转子系统具有较好的稳定性，本文理论分析和实验结果为超高速永磁电机轴系设计和动力学分析提供了参考。
Abstract
Taking a permanent magnet synchronous motor with 10 kW and 120 000 r/min ultra-highspeed as a test prototype, tests were conducted to study dynamic behavior of arotor system with 3-pad bidirectional gas foil bearing (GFB) and high-speed motor. The 3-pad bidirectional GFB’s load-bearing features were analyzed, natural frequencies of conical and parallel whirling modes of the elastically supported rotor system were calculated based on an appropriate simplification ofbearing stiffness and damping coefficients. 30 000 r/min and 60 000 r/min speed-up tests and a 90 000 r/min free deceleration test were conducted on the prototype. Test results showed that the take-off speed of the rotor is about 4 000 r/ min; when the rotor running at 90 000 r/min, there is a strong sub-synchronous whirl frequency, it is completely caused by the system itself; the rotor system with 3-pad bidirectional GFB has a better stability; the theoretical analysis and test results here provide a reference for designing ultra-high speed permanent magnet motor shafting and its dynamic analysis.
关键词
三瓦双向箔片轴承 /
超高速电机 /
亚同步涡动 /
刚体模态 /
转子动力学
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Key words
3-pad bidirectional-foil bearing (GFB) /
ultra-high-speed motor /
sub-synchronous whirl /
rigid body mode /
rotor dynamics
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参考文献
[1] Moore J. J, Lerche A, Allison T, et. al,．Development of a high speed gas bearing test rig to measure rotordynamic force coefficients [J]．Transactions of the ASME Journal of Engineering for Gas Turbines and Power，2011，133：102504-1-9．
[2] 虞烈，戚社苗，耿海鹏. 可压缩气体润滑与弹性箔片气体轴承技术[M]. 北京：科学出版社，2011：1-1．
Yu lie, QI She-miao, GENG Hai-peng, et al. Compressible Gas Lubrication and Elastic Foil Gas Bearing Technology[M]. Beijing: Science Press, 2011:1-1.
[3] Lee D, Kim D, Sadashiva P. R．Transient thermal behavior of preloaded three-pad foil bearings: modeling and experiments [J]．Transactions of the ASME Journal of Tribology，2011，133：021703-1-11．
[4] Andres S. L, Kim T H．Forced nonlinear response of gas foil bearing supported rotors [J]．Tribology International，2008，41：704-715．
[5] Sim K, Kim D．Design of flexure pivot tilting pads gas bearings for high-speed oil-free microturbo machinery [J]．Transactions of the ASME Journal of Tribology，2007，129：112-129．
[6] Kim T H，Lee J，Kim Y M．Static structural characterization of multilayer gas foil journal bearings[C]．Proceedings of ASME Turbo Expo 2015: Turbine Technical Conference and Exposition，Montreal，Canada，2015．
[7] Y. Tian, Y.H. Sun. and L Yu, Structural Stiffness and Damping Coefficients of a Multi-leaf Foil Bearing with Bump Foils Underneath [J]. Journal of Engineering for Gas Turbines and Power 136(2014),044501.
[8] Zhang Bo, Qi She-miao, Feng Sheng, et. al,. An experimental investigation of a microturbine simulated rotor supported on multileaf gas foil bearings with backing bump foils [J]. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology，2018，232 (9)：1169–1180．
[9] Zhang Kai, Zhao Xue-yuan, Feng kai, et al. Analysis of novel hybrid bump-metal mesh foil bearings[J]. Tribology International, 2016, 103: 529-539.
[10] Rimpel A, Kim DJ. Rotordynamic performance of flexure pivot tilting pad gas bearings with vibration damper [J] Transactions of the ASME Journal of Tribology，2009，131：021101-1-12．
[11] Shrestha K. S, Kim DJ, Kim YC．Experimental feasibility study of radial injection cooling of three-pad air foil bearings [J]．Transactions of the ASME, Journal of Tribology，2013，135：041703-1-9．
[12] Kim DJ, Lee DH．Design of three-pad hybrid air foil bearing and experimental investigation on static performance at zero running speed [J]．Transactions of the ASME, Journal of Engineering for Gas Turbines and Power，2010，132：122504-1-10．
[13] Weissert H. D, Valley S. Bidirectional radial foil bearing. [P]//United States Patent, 2002, US 0, 054, 718A1:1-5.
[14] Feng Sheng, Geng Hai-peng, Zhang Bo, et. al. Testing of a 100kW oil-free high-speed permanent-magnet synchronous motor [J]. International Journal of Applied Electromagnetics and Mechanics, 2017，50(1)：1–7．
[15] Choe B S, Kim T H, Kim C H, et. al,. Rotordynamic behavior of 225kW (300HP) class PMS motor-generator system supported by gas foil bearings[J]．Transactions of the ASME, Journal of Engineering for Gas Turbines and Power，2015，137：092505-1-8．
[16] Kim DJ, Lee AS, Choi B S. Evaluation of foil bearing performance and nonlinear rotordynamics of 120kW oil-free gas turbine generator[J]．Transactions of the ASME, Journal of Engineering for Gas Turbines and Power，2014，136：032504-1-8．
[17] 田野，孙岩桦，杨利花等. 带弹性支撑和挤压油膜阻尼器的高速电机支撑系统实验研究[J]. 中国电机工程学报，2012, 32 (27)：79-86．
TIAN Ye, SUN Yan-hua, YANG Li-hua, et al. Experimental Studies on Support Systems of High Speed Motors With Flexible Squirrel-cage Support and Squeeze Film Dampers[J]. Proceedings of The Chinese Society for Electrical，2012,32(27)：79-86．
[18] 冯凯，胡小强，赵雪源，李文俊. 三瓣式气体箔片径向轴承的静动态特性[J]. 中国机械工程，2017, 28 (15)：1826-1835．
FENG Kai, HU Xiao-qiang, ZHAO Xue-yuan, et al. Static and Dynamic Performances of a Three-pad Gas Foil Journal Bearing[J]. China Mechanical Engineering，2017, 28 (15)：1826-1835．
[19] 戚社苗，耿海鹏，虞烈. 动压气体轴承的动态刚度和动态阻尼系数[J]. 机械工程学报，2007, 43 (5)：91-98．
QI She-miao, GENG Hai-peng, YU Lie. Dynamic stiffness and dynamic damping coefficients of aerodynamic bearings[J]. Chinese journal of mechanical engineering，2007，43(5)：91-98.
[20] FENG Kai, Shigehiko Kaneko. Calculation of dynamic coefficients for multiwound foil bearings[J]. Journal of System Design and Dynamics，2009, 3 (5)：841-852．
[21] 徐方程，刘占生，马瑞贤等. 箔片摩擦对波箔型径向气体轴承静刚度和悬浮转速影响实验[J]. 航空动力学报，2013, 28 (10)：2194-2201．
XU Fang-cheng, LIU Zhan-sheng, MA Rui-xian, et al. Experiment of foil friction effect on static stiffness and lift off speed of bump foil journal bearing[J]. Journal of Aerospace Power，2013，28(10)：2194-2201.
[22] Guo Zhi-yang, Lyu Peng, Feng Kai, et al. Measurement and prediction of nonlinear dynamics of a gas foil bearing supported rigid rotor system [J]. Measurement，2018，121：205-217．
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