A vertical axis wind turbine

Abstract

The invention discloses a vertical axis wind power generator, which belongs to the field of wind power generation equipment and includes a wind power machine, a gearbox, and a generator. The wind power machine includes a vertical shaft and several blades. The two support plates are installed vertically on the vertical rotating shaft at equal intervals in the circumferential direction; the front edge of the blade is provided with a cavity, and the opening of the cavity is covered with a flexible film. The vertical axis wind power generator provided by the present invention adopts partial flexible blades, and has better aerodynamic performance compared with traditional rigid airfoils; at the same wind speed, it can effectively improve the lift-to-drag ratio of the wind turbine blades, increase the output torque of the wind turbine, and broaden the The range of effective working conditions of the blades of the wind turbine can realize the effective utilization of wind energy at low wind speeds, and the structure is simple and easy to control.

Description

technical field [0001] The invention belongs to the field of wind power generation equipment, and in particular relates to a vertical axis wind power generator. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Its reserves are huge, and the total global wind energy resources are about 2.74×10 9 megawatts, of which available wind power is 2×10 7 megawatts. China's wind energy reserves are large and widely distributed, with great potential for development and utilization. [0003] The introduction of the concept of distributed energy systems in recent years provides a new direction for solving the current energy problems, and wind power is an important part of it. The research on wind power generation equipment, especially small and medium-sized wind power generation equipment suitable for distributed energy systems has important application value. Of course, the relatively wi...

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Problems solved by technology

[0004] However, H-type wind turbine blades generally adopt an equal-section airfoil structure. In most applications such as residential areas and high-rise buildings, the wind force is generally low, and in the actual operation of the wind turbine, the wind speed may change constantly, and the wind turbine cannot work. In the best working condition point, especially when the wind speed becomes low, the angle of attack of the incoming flow becomes smaller, and the phenomenon of flow separation tends to occur on the blades of the wind turbine, the lift force on the blades becomes smaller and the resistance increases, and the maximum torque cannot be obtained. It can only operate at low load, or the wind speed is too low so that the wind turbine cannot start and run, resulting in low annual operating hours of wind power equipment, and there are still problems of high start-up wind speed and low output efficiency

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