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The study on the shrink-fit multi-ring flywheel with fall-off function

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Nuclear Science and Techniques 2017年第3期28卷 115-122页

作者： Yu-Jin Wang De-Zhong Wang Wei-Zhong Guo Jun-Lian Yin Cheng-Wei Wang School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Dalian Clean Energy Heavy Industrial Co. LTDDalian 116630 China

Structural integrity of the flywheel of reactor coolant pump is important for safe operation of a nuclear power plant. A shrink-fit multi-ring flywheel is designed with a fall-off function, i.e., it will separate from the shaft at a designed fall-off rotation speed, which is determined by the assembly process and the gravity. However, the two factors are ignored in the analytical method based on the Lame's equation. In this work, we conducted fall-off experiments to analyze the two factors and used the experimental data to verify the validity of the analytical method and the finite element method(FEM). The results show that FEM performs better than the analytical method in designing the falloff function of the flywheel, though FEM cannot successfully predict the strain variation with the rotational speed.

关键词： Multi-ring flywheel Fall-off rotational speed Shrink-fit assembly Gravity

RESEARCH ON CONTROL OF flywheel SUSPENDED BY ACTIVE MAGNETIC BEARING SYSTEM WITH SIGNIFICANT GYROSCOPIC EFFECTS

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Chinese Journal of Mechanical Engineering 2004年第1期17卷 63-66页

作者： ZhangKai ZhaoLei ZhaoHongbin DepartmentofPhysicalEngineering TsinghuaUniversityBeijing100084China

Traditional PID controllers are no longer suitable formagnetic-bearing-supported high-speed flywheels with significant gyroscopic effects. Becausegyroscopic effects greatly influence the stability of the flywheel rotor, especially at highrotational speeds. Velocity cross feedback and displacement cross feedback are used to overcomeharmful effects of nutation and precession modes, and stabilize the rotor at high rotational speeds.Theoretical analysis is given to show their effects. A control platform based on RTLinut and a PCis built to control the active magnetic bearing (AMB) system, and relevant results are reported.Using velocity cross feedback and displacement cross feedback in a closed loop control system, theflywheel successfully runs at over 20000 r/min.

关键词： Active magnetic bearings flywheel Displacement cross feedback Velocitycross feedback Gyroscopic effects

Study on electromechanical coupling nonlinear vibration of flywheel energy storage system

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Science China(Technological Sciences) 2006年第1期49卷 61-77页

作者： JIANG Shuyun JU Lihua Department of Mechanical Engineering Southeast University Nanjing 210096 China Department of Mechanical Engineering Southeast University Nanjing 210096 China

The electromechanical coupling dynamics of the flywheel energy storage system (FESS) with a hybrid permanent magnetic-dynamic spiral groove bearing has been studied. The functions of the kinetic energy, the potential energys, the magnetic field energy in air gap of the flywheel motor and the energy dissipation of the whole system were obtained, and the differential equations set with electromagnetic parameters of FESS was established by applying the extended Lagrange-Maxwell equation. The four-order implicit Runge-Kutta formula to the equations was derived, and the nonlinear algebraic equations were solved by using the Gauss-Newton method. The analytical solution of an example shows that the upper damping coefficient, the lower damping coefficient and the residual magnetic induction of the rare earth permanent magnet play an important role in electromechanical resonance of the flywheel rotor system. There is a small change for the electromechanical coupling resonance frequency with the upper damping coefficient in-creasing, but the resonance amplitude decreases with the upper damping coefficient in-creasing. With the lower damping coefficient increasing, the resonance frequency in-creases, and the resonance amplitude decreases. With the residual magnetic induction of the permanent magnet increasing, the resonance frequency decreases, and the reso-nance amplitude increases.

关键词： flywheel energy storage system, hybrid permanent magnetic-dynamic spiral groove bearing, electromechanical coupling dynamics, Lagrange-Maxwell equation.

Performance Analysis of the flywheel Assembly Design Using SolidWorks Modeling and Simulation Capabilities

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Smart Grid and Renewable Energy 2022年第5期13卷 109-119页

作者： Abdelbaki Abdallah Seif Eddine Bendaoudi Houcine Naim Samir Habibi Laboratory of Industrial Engineering and Sustainable Development Mechanical Department University of Relizane Relizane Algeria

The flywheel energy storage system (FESS) has been rediscovered a few years ago, it is a rotary system allowing the storage and restoration of kinetic energy which has an inertia wheel. The current paper investigates an assembly design of the flywheel for durable, maintainable and optimal performance. The designed model is based on a geometrical configuration which was already studied in a previous research. Using SolidWorks modelling and simulation capabilities, the model was designed and investigated with different combination of materials. A total of 16 combinations has been tested at high speed and then analyzed in order to optimize the effect of materials on the efficiency of the flywheel and particularly on the specific energy and stress Von-Mises stress. This research shows that a good geometric design of the flywheel and selection of combination of two materials can improve its energy storage capacity. Maximum specific energy of 55,764.538 J/Kg, is observed in the flywheel of combined material which is about 13% higher than flywheel of a single material.

关键词： flywheel Simulation Modelling Energy Storage High Mechanical Strength

THE CALCULATION METHOD OF flywheel MOMENT OFINERTIA OF CRANE MECHANISM

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Journal of Northeast Forestry University 1995年第4期6卷 64-67页

作者：谷永茂 Northeast Forestry University China

The origin and substance of the tlywheel moment calculation method of inertia mo ment of crane mechanism are set forth comprehensively and systematically in this paper, that is, the nucleus or the focus ofmoment of inertia calculation is the problem of calculating convertible tlywheelmoment. It is much better for the calculation of flywheel moment of loading move mass of lifting, traveling and rotating mechanism using the low of conservation of energy, the theorem of kinetic energyfor that of radius - changing mechanism, and the law of conservation of energy for that of all parts of gearing mechanism.

关键词： Mechanism of crane Moment of inertia Moment of flywheel Calculation method

Reducing Fuel Consumption Using flywheel Battery Technology for Rubber Tyred Gantry Cranes in Container Terminals

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Journal of Power and Energy Engineering 2017年第7期5卷 15-33页

作者： Kai Hou Tan Yap Fook Fah School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore

flywheel Energy Storage System (FESS) is used as an energy regeneration system to help with reducing peak power requirements on RTG cranes that are used to load or unload container ships. Nevertheless, with the use of FESS, Port Operator can deploy undersized generator for new RTG as this will further reduce fuel consumption. This paper presents the investigation of the amount of energy and fuel consumption that can be reduced in Rubber Tyred Gantry (RTG) cranes in container terminals by the use of simulation. In addition, Variable Speed Generator is integrated to the simulation-hybridized RTG. Simulation results reveal that the total energy saving exceeded 30% relatively to conventional RTG. A hardware-in-loop system is introduced for the purpose of validating the simulation results. The hardware components procured include a FESS, a Variable Frequency Drive (VFD) and brake resistors.

关键词： flywheel Energy Storage System Rubber Tyred Gantry Mechanical Battery Hardware-in-Loop (HIL) Simulation

Suppression of Gyroscopic Rotation in flywheel Energy Storage Systems

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Suppression of Gyroscopic Rotation in Flywheel Energy Storag...

Characteristic Analysis and Harmonic Feature Identification of Micro-Vibration on flywheels

2011 Chinese Control and Decision Conference（CCDC）

作者： Yong Xiao is with College of Information Engineering,Shenyang University of Chemical Technology,Shenyang,China Chi Zhang is with Ningbo Institute of Technology,Zhejiang University,Ningbo,China Kuanyi Zhu is with Department of Electronic and Computer Engineering,Ngee Ann Polytechnic,Singapore Xiaoyu Ge is with College of Information Engineering,Shenyang University of Chemical Technology,Shenyang,China

flywheel energy storage systems （FESS） with magnetically assisted bearings are becoming an exciting alternative to traditional battery systems.However,one of the challenging problems for such systems is to suppress the gyroscopic rotation of the sensitive rotor subject to internal or external disturbances.This paper presents an optimal control strategy by incorporating cross-coupling technology into the closed-loop architecture,so that synchronized movement of the rotor in the radial direction can be resulted,instead of unwanted gyroscopic e ect.Simulation study demonstrating the e ectiveness of the proposed approach is provided.

关键词： flywheel rotor synchronization gyroscopic rotation

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Journal of Donghua University(English Edition) 2021年第1期38卷 28-35页

作者：尹显波盛晓伟徐洋申妍 College of Mechanical Engineering Donghua UniversityShanghai 201620China

To avoid the negative effects of disturbances on satellites,the characteristics of micro-vibration on flywheels are studied.Considering rotor imbalance,bearing imperfections and structural elasticity,the extended model of micro-vibration is established.In the feature extraction of micro-vibration,singular value decomposition combined with the improved Akaike Information Criterion(AIC-SVD)is applied to denoise.More robust and self-adaptable than the peak threshold denoising,AIC-SVD can effectively remove the noise components.Subsequently,the effective harmonic coefficients are extracted by the binning algorithm.The results show that the harmonic coefficients have great identification in frequency domain.Except for the fundamental frequency caused by rotor imbalance,the harmonics are also caused by the coupling of imperfections on bearing components.

关键词： flywheel micro-vibration sigular value decomposition comined with the improved Akaike Information Criterion(AIC-SVD) harmonic coefficient binning algorithm

Design and Analysis of a Magnetic Bearings with Three Degrees of Freedom

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Chinese Journal of Mechanical Engineering 2019年第1期32卷 142-151页

作者： Ye Yuan Yukun Sun Qianwen Xiang School of Electrical and Information Engineering Jiangsu University College of Electrical Engineering Nanjing Institute of Technology

The current research of supporting and transmission system in flywheel energy storage system(FESS) focuses on the low consumption design. However, friction loss is a non-negligible factor in the high-speed but lightweight FESS energy and momentum storage with mechanical-type supporting system. In order to realize the support system without mechanical loss and to maximize the e ciency of the flywheel battery, a permanent magnet biased magnetic bearings(PMBMB) is applied to the FESS with the advantages of low loss, high critical speed, flexible controllability and compact structure. In this frame, the relevant research of three degrees of freedom(3-DOF) PMBMB for a new type FESS is carried out around the working principle, structural composition, coupling characteristics analysis, mathematical model, and structural design. In order to verify the performance of the 3-DOF PMBMB, the radial force mathematical model and the coupling determination equations of radial two DOF are calculated according to an equivalent magnetic circuit, and radial–axial coupling is analyzed through finite element analysis. Moreover, a control system is presented to solve the control problems in practical applications. The rotor returns to the balanced position in 0.05 s and maintains stable suspension. The displacement fluctuation is approximately 40 μm in the y direction and 30 μm in the x direction. Test results indicate that the dynamic rotor of the proposed flywheel energy storage system with PMBMB has excellent characteristics, such as good start-of-suspension performance and stable suspension characteristics. The proposed research provides the instruction to design and control a low loss support system for FESS.

关键词： flywheel energy storage system Magnetic bearings Degrees of freedom Coupling Finite element analysis