Vertical axis wind turbine based on magnetic damping technology

Abstract

The invention discloses a vertical axis wind turbine based on a magnetic damping technology and belongs to the technical field of wind power generation. The vertical axis wind turbine capable of stably running in a high-wind-speed area is designed, in order to improve the utilization rate of wind energy, a unique upper divergent paddle structure and a magnetorheological fluid energy storage mechanism are designed, paddles can generate upward lift force when rotating at a high speed under the action of wind power, a stand column is driven to stretch out upwards along the pipe wall of a pile foundation, a sliding valve is installed at the bottom of the stand column and divides a pile foundation cavity into an upper cavity and a lower cavity, and in the ascending process of the sliding valve, magnetorheological fluid in the upper cavity enters the lower cavity through a drainage hole in the sliding valve and provides reverse torsion for preventing a turbofan from rotating along with a hub, so that part of wind energy is converted into gravitational potential energy of a wind tower to be stored, and the other part of wind energy is converted into damping force, so that the stability of the hub in high-speed movement is enhanced.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a vertical axis wind power generator based on magnetic damping technology. Background technique [0002] Compared with the horizontal axis wind turbine, the blades of the vertical axis wind turbine are distributed symmetrically around the central axis, which reduces the burden on the tower. At the same time, the rotation of the blades of the vertical axis wind turbine has nothing to do with the wind direction and can absorb The energy from the wind in any direction does not need to face the wind when the wind direction changes, and does not need to adjust the mechanism. It can still operate at high wind speeds, and the maximum wind speed can reach 50m / s, so its operating range is much larger than that of horizontal axis wind turbines, which can realize the utilization of wind energy by fans at high wind speeds. [0003] The pitch control technology of wind turbines...

AI Technical Summary

Problems solved by technology

[0005] The application in wind turbines has been relatively mature, but the theoretical research and practical application of vertical axis wind turbines are relatively slow, so the application of blade pitch technology in vertical axis wind turbines is very rare, and most pitch technology only stays in the theoretical stage

At the same time, one of the main reasons restricting the development of vertical axis wind turbines is that due to the special structure of vertical axis wind turbines, it is easy to generate strong airflow disturbances in the sweeping area during the rotation of the blades. Cause the blades to vibrate and vibrate, which is not conducive to the stable operation of the generator

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