Vertical axis wind turbine

Abstract

The invention discloses a vertical axis wind turbine, which comprises at least three main blades (1), wherein the middle of each main blade (1) is fixed with one end of a beam (2); the other end of the beam (2) is fixed with the top of a rotating shaft (3); the beam (2) is fixed with the upper end and the lower end of the main blade (1) through a supporting blade (4) respectively; the rotating shaft (3) is vertically connected with a tower post (5); a supporting shaft (6) extends out of the top of the rotating shaft (3); the supporting shaft (6) is fixed with each beam (2) through a supporting rod (7); the upper end and the lower end of each main blade (1) are provided with a wingtip winglet (8) respectively; the upper end and the lower end of each main blade (1) extend out from the connecting point of both ends and the supporting blade (4) in a straight line ; all the main blades (1) are fixedly connected through a coupling ring (9); and the connecting point is arranged between the extending point of each main blade (1) and the wingtip winglet (8). The wind turbine has the advantages of simple structure, strong stability and high efficiency and is favorable for large-scale application.

Description

technical field [0001] The invention relates to the field of wind energy applications, in particular to a vertical axis wind turbine. Background technique [0002] At present, the most widely used vertical axis wind turbines mainly have two different structures, namely the Darrieus Φ structure and the Darrieus H structure. Among them, the vertical axis wind turbine with Darrieus Φ structure is mainly used in large-scale occasions; the vertical axis wind turbine with Darrieus H structure is mainly used in miniaturized occasions. [0003] see figure 1 , figure 1 It is a structural schematic diagram of the existing Darrieux Φ-type and H-type vertical-axis wind turbines. Such as figure 1 As shown, the Darrieux Φ-type vertical axis wind turbine uses curved blades, which only bear tension and do not bear centrifugal force loads, so the bending stress is minimized. Because the blade material is subjected to stronger tension than bending stress, bay blades are lighter for the s...

AI Technical Summary

Problems solved by technology

However, the centrifugal force generated by the vertical axis wind turbine with H-shaped structure will cause severe bending stress on the blade at its connection point, and the blade is supported at the end of the cantilever beam, which is easy to swing; the cantilever beam also bears a huge bending moment

At the same time, the blades need to be supported by crossbars or cables, which will generate aerodynamic resistance and reduce efficiency

[0005] In the process of realizing the present invention, the inventors found that the existing vertical axis wind turbines have complex structures, poor stability and low efficiency, which is not conducive to the large-scale application of vertical axis wind turbines

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