Wind collecting double-click type wind wheel vertical shaft wind power generator

Abstract

The invention relates to a wind collecting double-click type wind wheel vertical shaft wind power generator which comprises a wind wheel, a supporting and fixing tower barrel, a vertical transmission shaft, a speed increaser and a generator, wherein the vertical transmission shaft is positioned in the supporting and fixing tower barrel; a hollow cylinder is sleeved on the supporting and fixing tower barrel and rotates around the supporting and fixing tower barrel; the wind wheel is fixed on the hollow cylinder, and is connected with the speed increaser through the vertical transmission shaft; the speed increaser is connected with the generator; the edge of the wind wheel is provided with a stream-line type lifting force blade; a wind collecting cover is arranged in front of the semi periphery of wind wheel air intake; a wind collecting cover supporting rod is connected to the supporting and fixing tower barrel through a bearing; a rectifying air deflector and one end, close to the wind wheel, the wind collecting cover are fixed along the outer edge of the wind wheel through a shaft; and the wind collecting cover is provided with an automatic air discharging device. The wind collecting cover is designed according to the aerodynamics theory, wind energy can be collected, and the wind speed is increased, and the generating power is improved; wind is adjusted by the rectifying air deflector into positive wind which can be used for increasing the speed of the wind wheel, and the wind energy utilization ratio is improved; and the continuous normal operation of the generator is ensured by the automatic air discharging device and the generator is not damaged by strong wind.

Description

technical field [0001] The invention relates to a wind-gathering double-click type wind wheel vertical axis wind power generation device, which belongs to the field of power generation equipment. Background technique [0002] Wind turbines can be classified into two categories: horizontal axis wind turbines and vertical axis wind turbines. Although horizontal axis wind turbines, which are widely used at present, can utilize high-altitude wind energy, their utilization rate is still low. According to the Bezier limit theory, the theoretical maximum utilization rate of wind energy for horizontal axis wind turbines is 59.3%, but in practical applications, the utilization rate of wind energy is much lower than this value. For example, a 2.5 MW horizontal axis wind turbine made in Germany has a rotor diameter of 80m and a swept area of ​​5024m 2 , the design wind speed is 15 m / s, and the wind energy utilization efficiency is only 24.1%. When the wind speed is 9 m / s, the maximum ...

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Problems solved by technology

[0003] Currently widely used horizontal axis wind turbines are limited by the structural strength of the blades, and the power of a single unit is difficult to exceed 5 megawatts, while a wind turbine with 3 megawatts is already close to the commercial limit, and the cost is expensive, generally 10,000 Yuan / kw or more

[0004] The speed reducer, generator and other equipment of the horizontal axis wind turbine must be installed in the cabin at the top of the tower with a height of several tens of meters. Due to the constraints of the narrow space at the high altitude, the volume, weight and shape of the above equipment must be affected. Strict restrictions, complex structure, high failure rate, according to statistics, the average operating rate is less than 20%

It is also very inconvenient for daily inspection and maintenance and maintenance after failure

Due to factors such as insufficient start-up due to high investment and failure rate, the economic benefits of wind farms equipped with horizontal axis wind turbines are poor, and there are not many real profits at present.

This also seriously restricts the healthy development of wind power, a green energy industry.

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