Dynamics Characteristics of Rotor Systems under Magnetic Bearing Excitation

被引：0
|
作者：
Li S. [1 ]
Zheng L. [1 ]
机构：
[1] School of Power and Energy, Northwestern Polytechnical University, Xi'an
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2021年 / 32卷 / 08期
关键词：
Backward whirl; Forward whirl; Harmonic excitation; Magnetic bearing; Rotor system;
D O I：
10.3969/j.issn.1004-132X.2021.08.003
中图分类号：
学科分类号：
摘要：
To analyze the vibration mechanism of the rotor systems excited by magnetic bearings, a calculation model for dynamics characteristics of a double-disk rotor system was established by using one-dimensional finite element method. The dynamics behaviors of rotor system under different types of magnetic bearing excitations were studied. Results show that the co-rotating sweep frequency exciting forces excite forward whirl mode of the rotor systems, while the counter-rotating sweep frequency exciting forces excite backward whirl mode. In both cases, the rotor system whirls in a circular trajectory. The unidirectional harmonic exciting force may be decomposed into the sum of co-rotating and counter-rotating exciting forces, therefore both of the backward whirl and forward whirl modes of the rotor system are excited and the rotor system whirls with an elliptical trajectory under the effect of unidirectional harmonic sweep exciting force. Under bi-directional harmonic sweep exciting forces, the whirl direction and whirl trajectory of the rotor system depend on the phase difference of the two exciting forces. Research results provide a theoretical basis for the selection of excitation scheme of magnetic bearings when evaluating the stability of rotor systems of high-pressure compressor. © 2021, China Mechanical Engineering Magazine Office. All right reserved.
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页码：901 / 907
页数：6
相关论文
共 20 条
  • [1] ATKINS K E, PEREZ R X., Assessing Rotor Stability Using Practical Test Procedures, Proceedings of the 21st Turbomachinery Symposium, pp. 151-159, (1992)
  • [2] NING Xi, WANG Weimin, ZHANG Ya, Et al., Dynamic Performance Analysis of Seals in a Centrifugal Compressor and Rotor System Evaluation, Journal of Vibration and Shock, 32, 13, pp. 153-158, (2013)
  • [3] SUN Zhenglan, Stability Analysis of Rotor Dynamic System for Centrifugal Compressors, Chinese Journal of Turbomachinery, 2, pp. 24-27, (2013)
  • [4] Axial and Centrifugal Compressors and Expander-compressors: API Standard: API 617-2014, pp. 1-374, (2014)
  • [5] QIAO Xiaoli, ZHU Changsheng, ZHONG Zhixian, Stability and Control for Cutting Chatter Based on Active Magnetic Bearings, China Mechanical Engineering, 27, 12, pp. 1632-1637, (2016)
  • [6] BAUMANN U., Rotordynamic Stability Tests on High-pressure Radial Compressors, Proceedings of the 28th Turbomachinery Symposium, pp. 115-122, (1999)
  • [7] TAKAHASHI N, MAGARA Y, NARITA M, Et al., Rotordynamic Evaluation of Centrifugal Compressor Using Electromagnetic Exciter, Journal of Engineering for Gas Turbines and Power, 134, 3, (2012)
  • [8] MOORE J J, WALKER S T, KUZDZAL M J., Rotordynamic Stability Measurement during Dull-load, Full-pressure Testing of a 6000 Psi Reinjection Centrifugal Compressor, Proceedings of the 31st Turbomachinery Symposium, pp. 29-38, (2002)
  • [9] MOORE J J, SOULAS T A., Damper Seal Comparison in a High-pressure Re-injection Centrifugal Compressor during Full-load, Full-pressure Factory Testing Using Direct Rotordynamic Stability Measurement, ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, pp. 1319-1326, (2003)
  • [10] BIDAUT Y, BAUMANN U, Al-HARTHY S M H., Rotordynamic Stability of a 9500 Psi Reinjection Centrifugal Compressor Equipped with a Hole Pattern Seal-measurement versus Prediction Taking into Account the Operational Boundary Conditions, Proceedings of the 38th Turbomachinery Symposium, pp. 251-259, (2009)
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