Five-level variable-pitch wind power generation device

Abstract

The invention discloses a five-level variable-pitch wind power generation device which comprises a supporting frame and a wind wheel fixed to the supporting frame. An electric generator is arranged between the wind wheel and the supporting frame. The wind wheel comprises a wind wheel shaft and a blade support. The centers of the two sides of the blade support are arranged at the two ends of the wind wheel shaft through flanges. The two sides of the blade support form mounting faces. Each mounting face comprises five concentrically-arranged mounting rings of different diameters at intervals, wherein the five mounting rings are connected into a whole through ten main ribs annularly arranged with the wind wheel shaft as the center of the circle to be fixed to the corresponding flange. The portions between the adjacent mounting rings on the two sides of the blade support are provided with a first-level blade, a second-level blade, a third-level blade and a fourth-level blade and further provided with a fifth-level blade. According to the five-level variable-pitch wind power generation device, solidity of the fan blades and the wind wheel is increased, the start wind speed of a draught fan is lowered, the wind filed condition is lowered, through five-level variable pitch, the blades can be adjusted at different layers at different wind speeds according to the requirements, the fan blades are shortened, the manufacturing, transporting and mounting difficulty is lowered, cost is reduced, and wind power generation can be better achieved.

Description

technical field [0001] The invention relates to a five-stage variable-pitch wind power generation device. Background technique [0002] With the development of science and technology and the improvement of living standards, the demand for energy, especially environmentally friendly energy, is increasing, and the phenomenon of energy shortage is becoming more and more serious. It urgently needs to be solved by the whole society. As an economical and environmentally friendly renewable energy It has aroused people's great attention. At present, there are many kinds of wind power technologies. Due to the different technical applications, many projects have high costs and poor economic benefits. It is difficult for wind power companies to survive without relying on state subsidies. At present, the most mature three-bladed propeller wind turbine has many shortcomings in terms of its structure and application. 1. One end of the three-bladed propeller is fixed at the center of the w...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology and the improvement of living standards, the demand for energy, especially environmentally friendly energy, is increasing, and the phenomenon of energy shortage is becoming more and more serious. It urgently needs to be solved by the whole society. As an economical and environmentally friendly renewable energy It has aroused people's great attention. At present, there are many kinds of wind power technologies. Due to the differences in technology applications, many projects have high costs and poor economic benefits. It is difficult for wind power companies to survive without relying on state subsidies.

At present, the most mature three-bladed propeller wind turbine has many shortcomings in terms of its structure and application. 1. One end of the three-bladed propeller is fixed at the center of the wind wheel, and it is extended by a single blade, which is limited by materials and technologies. It is difficult to continue to develop larger wind blades

2. The longer the blade extends, the greater the distance between the blades, and the relative wind energy utilization rate is low. 3. The speed of the upper and lower blade tips of the blades is different, and the wind resistance is also different. Due to the single adjustment of the blade, it cannot meet the requirements of different parts of the blade. 4. Gravity Concentrated in the center of the shaft, the inertia is poor, 5 blades are relatively few, and irregular gusts have a greater impact, 6 pairs of wind fields, high road requirements, and difficult hoisting

High cost in all aspects, relatively poor benefit

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