Structure of vertical axis windmill

Abstract

To provide a vertical axis windmill with improved power generation capacity.SOLUTION: Because light energy of sunlight S can be converted into electric energy by a flexible photoelectromotive element P provided on the outside surface of a lift force blade 7, power also can be generated by the sunlight S in addition to that by conventional rotation energy of a vertical axis windmill 8, so as to improve power generation capacity as the entire structure of the vertical axis windmill. Only the flexible photoelectromotive element P is provided on the outside surface of the lift force blade 7, and nothing projects outside an outer frame body 1, so as to maintain an advantage such that plural vertical axis windmills 8 can be overlaid per outer frame body 1. By using a perovskite type battery, the windmill is easily molded into a flexible and thin film-like shape, and is easily provided on the outside surface of the lift force blade 7.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vertical axis wind turbine structure. [Background technology]

[0002] One type of wind turbine for wind power generation is the vertical axis wind turbine, which has multiple lift blades attached to a vertical rotating shaft. There are two types of vertical axis wind turbines: a one-sided support type, in which only the lower end of the vertical rotating shaft is rotatably supported, and a two-sided support type, in which the vertical rotating shaft is housed inside a ventilated frame structure and both the upper and lower ends of the vertical rotating shaft are rotatably supported by the frame structure. The two-sided support type has higher support rigidity for the vertical axis wind turbine, and multiple types can be stacked on top of each other along with the frame structure if necessary (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-41596 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, compared to propeller-type horizontal axis wind turbines, vertical axis wind turbines can only generate effective rotational torque for the lift blades within an angular range of about 90 degrees, where the wind from the upwind side first strikes the lift blades in their 360-degree rotational range, whereas horizontal axis wind turbines generate rotational torque over the entire 360-degree rotational range of the lift blades. For this reason, vertical axis wind turbines have a lower power generation capacity than horizontal axis wind turbines.

[0005] The present invention has been made in view of the above-mentioned conventional techniques, and has an object to provide a vertical axis wind turbine with improved power generation capacity. [Means for solving the problem]

[0006] According to a first technical aspect of the present invention, there is provided a vertical axis wind turbine structure comprising an outer frame body having a structure capable of receiving sunlight and ventilation from all directions except the bottom surface, and a small-area support part near the center of the top and bottom, and a vertical axis wind turbine having a plurality of lift blades attached by a horizontal frame extending radially around a vertical rotation shaft whose top and bottom ends are supported rotatably relative to the support parts of the outer frame body, and characterized in that flexible photovoltaic elements are provided on the outer surfaces of the lift blades.

[0007] According to a second technical aspect of the present invention, the flexible photovoltaic element is characterized in that it is a perovskite cell. Effect of the Invention

[0008] According to the first technical aspect of the present invention, the flexible photovoltaic elements provided on the outer surface of the lifting blades can convert the light energy of sunlight into electrical energy, so that in addition to power generation from the rotational energy of the original vertical axis wind turbine, power generation from sunlight can also be obtained, improving the power generation capacity of the entire vertical axis wind turbine structure. By simply providing the flexible photovoltaic elements on the outer surface of the lifting blades, nothing protrudes outside the outer frame body, so the advantage of being able to stack multiple vertical axis wind turbines together with their outer frames on top of each other is maintained.

[0009] According to the second technical aspect of the present invention, since the flexible photovoltaic element is a perovskite type cell, it can be easily formed into a flexible and thin film, and can be easily installed on the outer surface of the lift blade. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is an overall perspective view showing a vertical axis wind turbine structure. [Diagram 2] FIG. 1 is a perspective view showing a vertical axis wind turbine. [Diagram 3] FIG. 1 is a plan view showing a vertical axis wind turbine. [Figure 4] A cross-section of a lift blade. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 1 to 4 are diagrams showing a preferred embodiment of the present invention.

[0012] The wind turbine structure according to this embodiment has an outer frame 1. The outer frame 1 is a rectangular parallelepiped with each side formed by a metal frame as a whole, and the side surfaces are formed only by four support columns 2. Small rectangular support parts 3 are formed in the center at the top and bottom of the outer frame 1. A circular hole 4 is formed in the center of each support part 3. Due to this structure of the outer frame 1, ventilation and reception of sunlight S are possible from all directions except the bottom surface.

[0013] The upper and lower ends of a vertical rotating shaft 5 are rotatably supported by bearings in the circular holes 4 of the upper and lower support parts 3. Lift blades 7 are attached to the vertical rotating shaft 5 by four horizontal frames 6. The vertical rotating shaft 5, horizontal frames 6 and lift blades 7 constitute a vertical axis wind turbine 8.

[0014] The lift blades 7 are of the straight blade type, and when they receive wind W, lift is generated on the lift blades 7, and the rotational component of this lift causes the vertical axis wind turbine 8 to rotate in the rotational direction R (see Figure 3). A pulley (not shown) is fixed near the lower end of the vertical rotation shaft 5, and the rotational force of this pulley is transmitted to a generator by a timing belt, where the rotational energy is converted into electrical energy.

[0015] Furthermore, a flexible photovoltaic element P is provided on the outer surface of the lift blade 7. In this embodiment, a perovskite cell is used as the flexible photovoltaic element P. In addition to the perovskite cell, a CIS, CIGS, GaAs or Si cell, an organic photovoltaic element (OPV), etc. can be used. The flexible photovoltaic element P is designed as a flexible film covered with at least one photoactive layer, and is provided on the outer surface of the lift blade 7 by a method such as adhesion. The perovskite cell used in this embodiment is flexible and easy to form into a thin film, so it is easy to install on the outer surface of the blade 7.

[0016] Since the outer frame 1 surrounding the vertical axis wind turbine 8 has a frame structure, direct light and reflected light of sunlight S pass through the outer frame 1 and hit the flexible photovoltaic elements P provided on the outer surfaces of the lift blades 7, and the light energy of sunlight S can be converted into electrical energy. The electrical energy generated by the flexible photovoltaic elements P can be extracted by a known slip ring or the like. Therefore, in addition to the inherent power generation of the vertical axis wind turbine 8, power generation by the flexible photovoltaic elements P can also be performed, improving the overall power generation capacity.

[0017] Furthermore, since there is nothing protruding outside the outer frame 1 by simply providing the flexible photovoltaic elements P on the outer surface of the lift blades 7, the advantage of being able to stack multiple vertical axis wind turbines 8 on top of each other with the outer frame 1 is maintained. [Explanation of symbols]

[0018] 1 Outer frame 2 pillars 3 Support part 5 Vertical Rotation Axis 6 Horizontal Frame 7 Lifting Blades 8 vertical axis windmill R Rotation direction P Flexible photovoltaic element S Sunlight W Wind

Claims

1. A vertical axis wind turbine structure that is capable of receiving sunlight and ventilation from all directions except the bottom surface, and that is composed of an outer frame body having a small support part near the center of the top and bottom, and a vertical axis wind turbine having a vertical rotation shaft whose top and bottom ends are rotatably supported by the support parts of the outer frame body, and a plurality of lift blades attached to a horizontal frame extending radially around the vertical rotation shaft, A vertical axis wind turbine structure characterized in that flexible photovoltaic elements are provided on the outer surfaces of the lift blades.

2. 2. The vertical axis wind turbine structure according to claim 1, characterized in that the flexible photovoltaic element is a perovskite type cell.

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