High-speed magnetically suspended flywheel energy storage device

Abstract

The invention provides a high-speed magnetically suspended flywheel energy storage device, which is characterized in that a casing is vertically mounted on a base, and the top of the casing is provided with a top end cover; a stator is vertically mounted at the lower part of the top end cover; a rotor coats outside the stator; the rotor is vertically integrated with a motor rotor; a passive magnetic suspension bearing is arranged between the top of the rotor and the stator for radial support; two interacting parts of magnetic poles of the passive magnetic suspension bearing are respectively arranged on the stator and the rotor, and the part on the rotor is a composite magnetic material containing permanent magnetic powder; and the bottom of the rotor is provided with a pin-type ball bearing, the top of the pin-type ball bearing is fixedly connected with an umbrella-shaped collet of the rotor, the bottom of the pin-type ball bearing is a sphere, the sphere is located in a bearing bush,the bearing bush is internally provided with lubricating oil, and the pin-type ball bearing forms axial support for the rotor. The structure 1) reduces the design difficulty of the bearing, 2) solvesproblems of the friction loss of the bearing and complex control of an active magnetic suspension bearing system, and 3) reduces the high-frequency harmonic eddy current loss of the rotor, reduces theheat generation amount of the rotor and improves the number of full-power rated capacity operation times of the flywheel in unit time.

Description

technical field [0001] The invention belongs to the technical field of high-speed and high-power flywheel energy storage, and relates to a high-speed magnetic levitation flywheel energy storage device. Background technique [0002] As a physical energy storage method, flywheel energy storage has the characteristics of fast response, long cycle life, environmental friendliness, and maintenance-free compared with chemical batteries. It is one of the important directions for the development of energy storage technology; and high-speed flywheel energy storage Compared with traditional low-speed flywheel energy storage, it has more excellent performances such as high energy and power density, millisecond-level fast response, etc., and has more application value. [0003] High-speed flywheels put forward higher requirements for the structural strength of the rotor, low-loss shafting, high-efficiency high-speed motors and other technologies. The existing high-speed maglev flywheel...

AI Technical Summary

Problems solved by technology

[0009] The invention aims to solve the problems in the prior art that the eddy current loss of the flywheel structure is large, the heat dissipation of the rotor is difficult, and the supporting structure of the rotor needs to be optimized.

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