Research On Structure Of Flywheel Rotor Based On Composite Materials

The flywheel of high-speed movement,with a high energy,is stored in the form of mechanical energy,which can be liberated in the case of needing energy.It is an energy storage method with high application value.This mode is being extensive favored because of its advantages such as high energy storage density,pollution-free,durable development,and so on.As the key component in the storage flywheel system,the rationalization of flywheel rotor structure is directly related to the energy storage value.In this paper,the physical property parameter of basalt fiber composite material is predicted.The materials of rotor hub and ply orientation have been confirmed.Single layer structure composite flywheel rotors of glass fiber,basalt fiber,carbon fiber and aramid fiber have been analyzed by ANSYS.When the interference is 0.2 mm,glass fiber,basalt fiber and aramid fiber are unsuited to be a flywheel material but carbon fiber is suitable.When the interference is 0.5 mm,glass fiber is unsuited to be a flywheel material because of its inferior security but the other three fiber material comply with the design requirement.In addition,the maximum speed of single layer structure composite flywheel rotor of basalt fiber,carbon fiber and aramid fiber have been forecasted and the results show that their maximum speed are 16000 rpm,23000rpm and 17500 rpm,respectively.The double-layer composite flywheel rotor structure of basalt fiber/ basalt fiber and basalt fiber/ carbon fiber have also been studied.The results indicated that the radial compressive stress of isomorphic basalt fiber composite flywheel rotor is lower than that of isomerous.Double-layer structure can reduces the radial tensile stress,which enhances the reliability of composite flywheel rotor.Its circumferential stress is not continuous and the maximal circumferential stress exists in the internal surface of outer layer material.The results of layered optimization indicate that the stress of uniform thickness delamination is minimum,and its flange is the radial compressive stress.The mechanical properties of flywheel rotor is worst when the thickness ratio of inlayer and outer layer is 2.33:1.Therefore,uniform thickness delamination is fine.The results in this paper can be acted as the basic data and parameters for the design and manufacture of the composite flywheel rotor.