储能科学与技术 ›› 2024, Vol. 13 ›› Issue (5): 1542-1550.doi: 10.19799/j.cnki.2095-4239.2023.0925

• 储能系统与工程 • 上一篇    下一篇

MW级大储能量飞轮轴系结构力学及动力学研究

胡东旭1,2(), 朱少飞3, 魏晓钢4, 崔亚东5, 祝保红5, 戴兴建1,2, 李文1,2, 陈海生1,2()   

  1. 1.中国科学院工程热物理研究所，北京 100190
    2.中国科学院大学，北京 100049
    3.中核汇能内蒙古能源有限公司，内蒙古 呼和浩特 010010
    4.中海油新能源二连浩特风电有限公司，内蒙古 二连浩特 011199
    5.北京泓慧国际能源技术发展有限公司，北京 101300
  • 收稿日期:2023-12-19 修回日期:2024-01-25 出版日期:2024-05-28 发布日期:2024-05-28
  • 通讯作者: 陈海生 E-mail:hudongxu@iet.cn;chen_hs@mail.etp.ac.cn
  • 作者简介:胡东旭（1987—），男，硕士，工程师，研究方向为压缩空气储能、飞轮储能，E-mail：hudongxu@iet.cn；
  • 基金资助:
    内蒙古自治区科技重大专项(2020ZD0017-1);国家重点研发计划项目(2023YFB2406301)

Research on mechanics and dynamics of MW-level large energy storage flywheel shafting

Dongxu HU1,2(), Shaofei ZHU3, Xiaogang WEI4, Yadong CUI5, Baohong ZHU5, Xingjian DAI1,2, Wen LI1,2, Haisheng CHEN1,2()   

  1. 1.Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing 100190, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.CNNP Rich Energy Inner Mongolia Corporation Limited, Hohhot 010010, Inner Mongolia, China
    4.CNOOC New Energy Erenhot Wind Power Co. Ltd, Erenhot 011199, Inner Mongolia, China
    5.Beijing Honghui Energy Development Co. Ltd, Beijing 101300, China
  • Received:2023-12-19 Revised:2024-01-25 Online:2024-05-28 Published:2024-05-28
  • Contact: Haisheng CHEN E-mail:hudongxu@iet.cn;chen_hs@mail.etp.ac.cn

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摘要：

当前，对于高功率大储能量飞轮储能系统的仿真和实验研究还不够充分，本工作主要针对MW/100 MJ级飞轮储能样机展开。比较分析了内置式和表贴式两种结构飞轮电机转子的结构力学，比较了不同动平衡块材质对应力及形变的影响，并开展了轴系的动力学特性分析。对飞轮样机开展了实验测试，验证了系统的稳定性。数值计算结果表明，表贴式结构形式可以使电机硅钢片应力显著降低，但是通常这种结构需要在硅钢片外缠绕碳纤维加强层，以确保运行时磁钢不会因为离心力与硅钢片发生分离。动平衡块材质为不锈钢时的应力值相较于动平衡块为铝合金时提高了45%以上。对轴系进行了动力学特性分析，在工作转速下存在着1300 r/min和4200 r/min两个刚性振型，分别为平动和锥动。测试运行中，飞轮轴系在1300 r/min出现振动峰值，证明了数值仿真计算的准确性。但是数值仿真中的4200 r/min临界转速(锥动)在实际运行中并未出现明显峰值，在本工作的轴系结构中，相较于锥动，平动振型更容易被激发。

关键词: 飞轮, 电机, 数值仿真

Abstract:

Current research on high-power, large-capacity flywheel energy storage systems remains insufficient. This study focuses on a newly developed prototype of a MW/100 MJ flywheel. We analyzed the structural mechanics of both built-in and surface-mounted flywheel motor rotors, assessed the impact of different dynamic balance block materials on stress and deformation, and performed a dynamic characteristics analysis of the shaft system. Experimental validation of the flywheel prototype was conducted to ascertain system stability. Findings from numerical calculations suggest that the surface-mounted design substantially reduces stress on the silicon steel sheet, although this configuration typically necessitates a carbon fiber reinforced layer to prevent the magnetic steel from detaching from the silicon steel sheet under centrifugal forces during operation. Stress values increased by over 45% when using stainless steel for the dynamic balance block compared to aluminum alloy. The shaft system's dynamic analysis revealed two rigid vibration modes at operational speeds of 1300 r/min and 4200 r/min, corresponding to translational and conical movements, respectively. Experimental observations confirmed a peak vibration at 1300 r/min, corroborating the numerical simulations. However, the anticipated critical speed (conical motion) at 4200 r/min did not manifest as a significant peak in actual tests, indicating that translational vibration modes are more prone to excitation in this shaft configuration.

Key words: flywheel, motor, numerical simulation

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