Energy Storage Science and Technology ›› 2018, Vol. 7 ›› Issue (5): 821-827.doi: 10.12028/j.issn.2095-4239.2018.0076

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Critical speed analysis of disc and column flywheel rotor system

REN Zhengyi1, ZHOU Yuanwei2, MA Yanqin3, HUANG Tong2   

  1. 1 National Engineering Experimental Teaching Demonstration Center, Harbin Engineering University, Harbin 150001, Heilongjiang, China;
    2 College of Mechanical and Electrical, Harbin Engineering University, Harbin 150001, Heilongjiang, China;
    3 Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2018-05-21 Revised:2018-06-28 Online:2018-09-01 Published:2018-09-01
  • Contact: 10.12028/j.issn.2095-4239.2018.0076

Abstract: For the flywheel energy storage system, the maximum speed of the flywheel energy storage system in experiments is 9300 r/min, which is less than the maximum rated speed of 15000 r/min. This will greatly reduce the maximum energy storage of the flywheel energy storage system. In order to improve rotor dynamics structural design, theoretical formulae analysis, finite element analysis of SAMCEF Rotor are used to study the critical speed distribution and stability of disc rotor and column flywheel rotor with combination of experimental data. The analysis result indicated that the second-order critical speed of the disc flywheel rotor with the same mass and different structure far exceeds the column-type flywheel rotor, and the first-order critical speed of the two types of flywheel is almost the same value. According to the different working speed and energy requirements of the flywheel rotor, different structural solutions should be adopted to ensure the requirements of the operating speed and stable operation.

Key words: flywheel energy storage, SAMCEF Rotor, critical speed, stability

CLC Number: