Stress characteristics of two kinds of variable thickness hollow energy storage flywheels

doi:10.19799/j.cnki.2095-4239.2020.0420

Abstract

Abstract:

Two models of hollow flywheel with variable thickness are established to analyze their stress characteristics. The stress characteristics of the two models are analyzed using ANSYS Workbench. By increasing the flange height of the two rotor models, the variation law of flywheel stress and flywheel deformation is studied. Seven suitable flange heights are selected to analyze the change trend of stress in the direction of flywheel radius under the selected flange height, and the maximum stress and maximum deformation of the two flywheel models are compared. The results showed that the maximum radial stress, maximum circumferential stress, and maximum axial stress of the two flywheel models reach stable values at the flange height of 60 mm, 60 mm, and 80 mm, respectively. The maximum stresses of Model 1 are 65%, 13.3%, and 430% higher than those of Model 2, and the deformation is 43.89% lower than that of Model 2. Under the same moment of inertia, the stress stable values of Model 1 are 54.3%, 44.4%, and 1420% higher than those of Model 2. During the same conditions, using flywheel Model 1 can better reduce the deformation of flywheel; using flywheel Model 2 can better reduce the stress of flywheel. The research results can provide a reference for the design of energy storage flywheels with long cylinder structures.

Key words: flywheel energy storage, Ansys Workbench, variable thickness flywheel, stress analysis

CLC Number:

TH 133

Chen LAN, Wenyan LI. Stress characteristics of two kinds of variable thickness hollow energy storage flywheels[J]. Energy Storage Science and Technology, 2021, 10(3): 1080-1087.

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飞轮模型	X₁/mm	X₂/mm	X₃/mm	X₄/mm	X₅/mm
模型一	20	60	40	0～150	20
模型二	20	60	40	0～300	20

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