Energy storage wheel and construction method of vacuum chamber of energy storage wheel

Abstract

The invention belongs to the field of electric energy storage engineering, and relates to a method for constructing an energy storage wheel and a vacuum chamber underground by using a concrete material. The inner and outer sides of a vacuum chamber well wall are subjected to waterproof and gas-isolating treatment. A magnetic bearing is adopted, an energy storage wheel is horizontally arranged, and suspension is achieved through the action of a bottom annular permanent magnet and an annular permanent magnet on a support. Reinforcing members are welded on an energy storage wheel rotating shaft, and steel bars are welded on the reinforcing member to serve as a framework of the energy storage wheel. A vertical embedded pipe for adjusting eccentricity is arranged, high-strength and high-density concrete is adopted for pouring the energy storage wheel, and the outer edge of the energy storage wheel is tensioned and reinforced through a binding and fixing material, so that safe operation of equipment at a relatively high rotating speed is ensured. The invention has the beneficial effects that: 1, the equipment space is greatly expanded, and an ultra-large-capacity energy storage electric field can be built; 2, the deformation of the vacuum chamber is restrained by the underground soil body, so that the operation safety of equipment is ensured; 3, the construction cost can be greatly reduced; and 4, arrangement is flexible, and the influence on the environment is small.

Description

technical field [0001] The invention belongs to the technical field of electric power storage, and in particular relates to a method for building an energy storage wheel and a vacuum chamber. Background technique [0002] The contradiction between daytime electricity production and consumption has been around for a long time, and the implementation of carbon reduction policies has further aggravated the contradiction. The use of wind energy and light energy to generate electricity has become the mainstream direction of power production development. Photovoltaic power generation is restricted by day and night and cloudy and sunny conditions, and wind power output is subject to changes in the strength of atmospheric flow. The outstanding feature of both is that the output fluctuates greatly and cannot be consistent with social needs in most periods of time. The most important way to solve the above problems is to control the production of power stations. The excess electric e...

AI Technical Summary

Problems solved by technology

[0005] Calculation formula E=Jω from energy storage wheel mechanical energy 2 / 2 It can be seen that the capacity of the energy storage wheel is positively correlated with the mass and rotational speed of the runner. The first method to increase the stored energy of the flywheel is to increase the rotational speed of the flywheel as much as possible. This is the main technical solution currently adopted, but limited by the mechanical properties of the flywheel material, If the centripetal force required by the rotating speed exceeds the maximum strength of the corresponding material, the flywheel will collapse and cause serious operation accidents. Therefore, at present, carbon fiber or other high-strength materials are mostly used to make small high-speed energy storage wheels. A single flywheel power generation equipment generally has relatively low energy Small, the construction of a MW-level flywheel energy storage electric field requires parallel connection of multiple KW-level equipment, which is expensive, and is currently limited to emergency power supply or local grid voltage regulation, or applied to small-scale energy recovery

It is difficult to build an energy storage power station with the same scale as a pumped storage power station using energy storage wheels

The second way to increase the mechanical energy of the energy storage wheel is to increase the mass of the energy storage wheel. However, the manufacture of a large energy storage wheel is not only limited by the strength of the material of the energy storage wheel, but also by the space of the vacuum chamber where the flywheel is located, because the vacuum under normal pressure Under the action of strong air pressure, the container will deform and destabilize the shell of the large vacuum chamber. If it is light, it will reduce the internal vacuum degree, increase the wind resistance of the energy storage wheel, and reduce the energy conversion efficiency. When the shell deformation is serious, the energy storage wheel and the Shell contact, causing extremely serious operating accidents

Images