Strength Analysis of Energy Storage Flywheel Wrapped with Composite Material

2013 ◽  
Vol 577-578 ◽  
pp. 105-108
Author(s):  
Hong Li ◽  
Yi Meng Pang ◽  
Fang Fang Xu ◽  
Li Li
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Power Systems ◽  
High Speed ◽  
Strength Analysis ◽  
Flywheel Energy Storage ◽  
Element Analysis ◽  
Rotating Speed ◽  
Energy Storage Efficiency ◽  
Design And Manufacture

The technology of flywheel energy storage is already widely used in motorcar, electric power systems, spaceflight and martial fields. Decreasing the weight, increasing rotating speed and strength of the flywheel rotor and improving the energy storage efficiency of the flywheel are always attention-getting. In this paper, the flywheel energy storage wrapped with composite material by interference fit to hub is designed and finite element analysis is done to obtain the stress distribution of it before being produced. The maximum and variety of stress are studied and the influence of composite material wrapped on flywheel rotating at a high speed is discussed. Then the action of composite material preload to the flywheel is thought about. The results of this analysis can prepare a valuable guide for flywheel energy storage at design and manufacture stage.

Analysis of Strength of Energy Storage Flywheel Rotating at a High Speed

2012 ◽  
Vol 251 ◽  
pp. 42-46 ◽  
Author(s):  
Zhen Li ◽  
Tao Jiang ◽  
Xiao Fang Bi ◽  
Hong Li ◽  
Li Li
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Power Systems ◽  
High Speed ◽  
Circumferential Stress ◽  
Flywheel Energy Storage ◽  
Element Analysis ◽  
Rotating Speed ◽  
Energy Storage Efficiency ◽  
Design And Manufacture

The technology of flywheel energy storage is already widely used in motorcar, electric power systems, spaceflight and martial fields. Decreasing the weight, increasing rotating speed and strength of the flywheel rotor and improving the energy storage efficiency of the flywheel are always attention-getting. In this paper, a flywheel energy storage is designed and finite element analysis is done to obtain the stress distribution of it before being produced. The maximum and variety of radial stress and circumferential stress are studied and the influence of composite material wrapped on flywheel rotating at high speed is discussed. Then the action of composite material to stress concentration around the small hole on the hub is thought about. The results of this analysis can prepare a valuable guide for flywheel energy storage at design and manufacture stage.

Design and Strength Analysis of Ultra-High Speed Permanent Magnet DC Rotor

2011 ◽  
Vol 188 ◽  
pp. 481-486 ◽  
Author(s):  
J.C. Xiao ◽  
S.H. Xiao ◽  
H. Wu
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
High Speed ◽  
Rotational Velocity ◽  
Contact Theory ◽  
Strength Analysis ◽  
Interference Fit ◽  
Rotating Speed ◽  
Shrink Fitting ◽  
Nonmagnetic Steel

The sintered neodymium-iron-boron (Nd-Fe-B) material is used in most of PM machines. The kind of PM materials has small tensile strength and cannot withstand large centrifugal force due to high rotational velocity. A nonmagnetic steel enclosure is needed to cover the PM material. The tensile stress of the PM can reduced by pre-pressure applied to the outer surface of the PM through shrink-fitting into the enclosure. Based on the elasticity theory and the elastic-plastic contact theory, in soft ANSYS it is feasibility to establish a finite element mechanical model of interference fit between the enclosure and motor rotor PM at high rotating speed. This paper simulates the effects of the temperature and rotating speed (centrifugal force) on the displacement and the contact pressure on the interference-fitting surfaces .By finite element non-linear contact model analysis, if setting up right fit clearance, this paper could ensure the security of the PM rotor under rotational velocity up to 300,000 r/min high and temperature up to 150°C.

scholarly journals Design and Experimental Evaluation of a Low-Cost Test Rig for Flywheel Energy Storage Burst Containment Investigation

2018 ◽  
Vol 8 (12) ◽  
pp. 2622 ◽  
Author(s):  
Armin Buchroithner ◽  
Peter Haidl ◽  
Christof Birgel ◽  
Thomas Zarl ◽  
Hannes Wegleiter
Keyword(s):  
Energy Storage ◽  
High Speed ◽  
Low Cost ◽  
Ambient Pressure ◽  
Failure Mechanisms ◽  
Test Methods ◽  
Flywheel Energy Storage ◽  
Test Rig ◽  
Strategic Development ◽  
Development Tool

Data related to the performance of burst containments for high-speed rotating machines, such as flywheel energy storage systems (FESS), turbines or electric motors is scarce. However, development of optimized burst containment structures requires statistically significant data, which calls out for low-cost test methods as a strategic development tool. Consequently, a low-cost test rig (so called spin pit) for the investigation of burst containments was designed, with the goal to systematically investigate the performance of different containment structures and materials, in conjunction with the failure mechanisms of different rotors. The gathered data (e.g., burst speed, acceleration, temperature, ambient pressure, etc.) in combination with a post-mortem analysis was used to draw an energy balance and enabled the assessment of the effectiveness of various burst containments.

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