Cooling system of flywheel energy storage device

Abstract

The invention discloses a cooling system of a flywheel energy storage device. The flywheel energy storage device consists of a shell and an internal disc-type motor, wherein the shell has a vacuum sealing structure; an upper oil cavity and a lower oil cavity are respectively arranged at the upper part and lower part of the shell; the shell internally comprises at least one set of flywheel; a center shaft of each flywheel is a hollow mandrel, and an axle hole is formed in the center of the center shaft and is communicated with the upper oil cavity and the lower oil cavity; an oil tank is arranged outside the shell; the oil tank is communicated with the upper oil cavity by an upper oil pipe and is communicated with the lower oil cavity by an oil return pipe; the oil return pipe is provided with a third valve, an oil pump and a radiator. The cooling system can be used for cooling a rotor by the axle hole, so that a great deal of heat of the rotor which rotates at a high speed can be taken away in time, and safe and stable operation of the flywheel energy storage device is guaranteed. An upper bearing, a lower bearing and a stator disc are cooled in time by part of cooling oil, and the bearings can be lubricated, so that the reliable work of key parts can be guaranteed, and the defects of cavitation and the like of a pump caused by low pressure can be avoided.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a heat dissipation system of a flywheel energy storage device. Background technique [0002] As an alternative to chemical batteries and supercapacitors, flywheel energy storage systems have the advantages of long life, low maintenance, high efficiency and high power. The flywheel energy storage relies on the inertia of the rotating flywheel rotor to convert electrical energy into kinetic energy and store it to realize uninterrupted power supply in the event of a power outage. When the flywheel rotates at high speed for a long time, the calorific value of the rotor is relatively large. In the case of concentrated discharge of large current, the calorific value of the stator is relatively large. If the heat cannot be dissipated in time, the excessive temperature will cause damage to the stator and rotor, resulting in The entire machine is damaged. At the same time, the flywheel...

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Problems solved by technology

[0004] The applicant aims at the disadvantages of the above-mentioned existing flywheel accumulators, such as the fact that the heat dissipation of the flywheel accumulator cannot take into account the various components, the inlet pressure of the pump is small and cannot work normally, and it is easy to cause cavitation and cannot dissipate heat, etc., to provide a cooling system for the flywheel accumulator with a reasonable structure, thereby It can not only dissipate heat from key components such as the stator, rotor, and bearings, but also take into account the lubrication of the bearings

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