KR101915220B1 - Vertical-axis wind turbine - Google Patents

Abstract

Disclosed is a vertical wind power generator. The vertical wind power generator comprises a wind power generator main body. The wind power generator main body may include: a rotary shaft; at least one main blade radially spaced apart about the rotary shaft; at least one sub blade connecting between the rotary shaft and the main blade; a generator for generating electrical energy using rotary force of the rotary shaft.

Description

Vertical Wind Turbine {VERTICAL-AXIS WIND TURBINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical wind turbine generator, and more particularly, to a vertical wind turbine generator capable of ensuring light weight and structural stability of the wind turbine generator.

The wind turbine generator is classified into a horizontal type and a vertical type according to the installation shape of the blade. Among these, the vertical type wind turbine has the advantage that it can generate power irrespective of the wind direction.

The wind turbine adopts an airfoil structure that maximizes the force of the direction vector component that rotates the blade under the generated aerodynamic load component because the change of the relative angle of attack of the blade section rotating about the direction of the wind is very large. .

Since such a wind turbine uses wind to produce electricity by rotating the blades, there is a demand for a technique to lighten the weight of the blades and to stably support the blades rotating by the wind.

Patent Publication No. 10-2012-0131827 (2012.12.05 published)

Embodiments of the present invention are intended to provide a vertical wind turbine capable of structurally and stably supporting the blade while realizing weight reduction of parts.

A vertical wind turbine generator according to one aspect of the present invention includes a wind turbine generator main body including: a rotary shaft; At least one main blade radially spaced apart from the rotation shaft; At least one sub blade connecting between the rotating shaft and the main blade; And a generator for generating electrical energy using the rotational force of the rotating shaft.

At least one of the main blades and the sub-blades is formed of a magnesium alloy that is drawn and formed into an airfoil, and the sub-blades can connect the main blades and the rotating shaft with a truss structure.

The main blade may include a first frame forming a head part; A second frame forming a tail; And a third frame assembled between the first frame and the second frame to form a body part.

The first frame may have a convex curvature curved surface formed on one side, a first vertical surface may be formed on the other side, and the sub-blade may have the same shape as the first frame.

Further, the vertical wind turbine according to an aspect of the present invention may further include a tower for supporting the generator, and the generator may be located at the center of gravity of the wind turbine generator main body.

The embodiments of the present invention are advantageous in that the main components such as the main blade are made of a magnesium alloy material so that the weight of the product can be reduced and the power generation efficiency of the wind turbine can be improved.

In addition, embodiments of the present invention can manufacture a main blade by assembling a plurality of frames that are drawn and formed, and some frames of the main blade can be applied to sub-blades. Therefore, when a main blade and a sub- There is an advantage in that the cost of additional production can be reduced.

Further, the embodiments of the present invention have an advantage in that the connection structure between the main blade and the rotating shaft can be stably supported by connecting the main blade and the rotating shaft in the form of a truss structure.

In addition, embodiments of the present invention have an advantage that a blade function can be performed by using a connection structure that connects the main blade and the rotating shaft by connecting the main blade and the rotating shaft through the sub-plate.

Embodiments of the present invention also have the advantage of securing the structural stability of the wind turbine by positioning the position of the generator at the center of gravity of the tower.

1 is a perspective view illustrating a vertical wind turbine according to an embodiment of the present invention.
Fig. 2 is an enlarged view showing the "A" portion of Fig. 1 on an enlarged scale.
3 is a cross-sectional view cut along the line BB of Fig.
4 is a cross-sectional view of the "CC"
5 is a side view showing a vertical wind turbine according to an embodiment of the present invention.
6 is a plan view of a vertical wind turbine according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

1 is a perspective view illustrating a vertical wind turbine according to an embodiment of the present invention.

As shown in FIG. 1, the vertical wind turbine according to an embodiment of the present invention may include a wind turbine generator 10 and a tower 600. Here, the main body 10 of the wind turbine generator may include a rotating shaft 100, a main blade 200, a sub blade 300, a generator 400, and a fixing bracket 500.

Specifically, the rotary shaft 100 of the wind power generator main body 10 may be vertically installed via the generator 400 so as to be rotatable at an upper end of the tower 600. Since the main blade 200 and the sub blade 300 are symmetrically connected to the rotating shaft 100 with respect to the center of rotation, they can rotate smoothly corresponding to various wind directions.

The rotary shaft 100 may be driven to be connected to the generator 400. Accordingly, when the rotating shaft 100 is rotated by the wind force, the rotating force of the rotating shaft 100 can be converted into electric energy through the generator 400. [

The main blades 200 may be provided at a plurality of positions that are located at the same radial distance from the rotating shaft 100. The plurality of main blades 200 may be spaced equidistantly in the circumferential direction of the rotary shaft 100 while maintaining the same distance from the rotary shaft 100.

In this embodiment, three main blades 200 are spaced apart from each other in the circumferential direction of the rotating shaft 100. However, the present invention is not limited thereto, and the main blade 200 may be symmetrical Within the positional range, a variable number of main blades 200 may be spaced apart circumferentially of the rotary shaft 100.

The main blade 200 may be pultruded to produce a streamlined airfoil having a rounded head and a sharp tail. At this time, since the material of the main blade 200 is made of a magnesium alloy that is lighter than an aluminum alloy material, energy efficiency due to weight reduction in wind power generation can be improved.

2 is an enlarged view showing the "A" portion of FIG. 1, FIG. 3 is a cross-sectional view cut along the "BB" Fig.

2 to 4, the main blade 200 can be drawn and formed into a frame corresponding to each part of the blade (for example, a head, a tail, and a body part). Each of the drawn and drawn frames can be made of a frame assembly that is assembled with one main blade.

For example, the main blade 200 includes a first frame 210 forming a round head, a second frame 220 forming a sharp tail, a first frame 210 and a second frame 220 And a third frame 230 which forms a body part so as to be connected in a streamlined manner.

In this embodiment, three frames (first to third frames 230) are assembled into one main blade 200, but are not limited thereto. Depending on the size and design environment of the main blade 200, Four frames may be assembled into one main blade 200 or two frames may be assembled into one main blade 200. [

Each of the frames is fitted in a state of being closely contacted with each other in the lengthwise direction of the main blade 200, and each of the assembled frames can be welded to each other. At this time, a first coupling protrusion 211 protruding from one side of the second frame 220 is formed on one side of the first frame 210, And a second engagement step 221, which is fitted to the other side of the second frame 220, may be protruded from the side.

A first vertical surface 213 may be formed on one side of the first frame 210 and a convex curved surface 212 may be formed on the other side of the first frame 210. A second vertical surface 223 may be formed on one side of the second frame 220 and a second side surface of the second frame 220 may be formed of a pointed surface 222.

The first engaging jaw 211 of the first frame 210 and the second engaging jaws 221 of the second frame 220 are fitted and fitted to both sides of the second frame 220, These frames can be mutually fitted and, in this state, the assembling portion between these frames can be welded.

The blade tip 240 can be coupled to both ends of the main blade 200. The blade tip 240 can be coupled to both ends of these frames with the first frame 210, the second frame 220, and the third frame 230 assembled together. This blade tip 240 secures additional lift to the airflow moving at both ends of the main blade 200, so that during wind power generation, the force of the wind can be utilized to the full of the rotational force of the blade.

The sub-blade 300 may be provided with a plurality of links connecting the rotating shaft 100 and the main blade 200. The plurality of sub-blades 300 can stably support the main blade 200 at the rotary shaft 100 by connecting the rotary shaft 100 and the main blade 200 in the form of a truss structure.

Of course, in addition to the sub-blade 300, a separate connecting frame 800 for connecting between the rotating shaft 100 and the main blade 200 or between the different main blades 200 may be provided in the vertical wind turbine .

The sub-blade 300 may be composed of the first frame 210 of the main blade 200. At this time, the sub-blade 300 is disposed in a direction opposite to the head portion (the first frame 210) of the main blade 200, so that the lift force can be increased or the drag force can be increased according to the wind direction .

For example, a sub-blade 300, i.e., a first side 210 of the first frame 210 is formed with a first vertical surface 213 that can confront the wind direction and the other side of the first frame 210 The convex curved surface 212 is formed so that the convex curved surface 212 is formed so that the curved surface 212 can increase the lift with respect to the wind and the other direction The first vertical surface 213 can increase the drag force to improve the rotational force of the rotary shaft 100. As a result, the power generation efficiency of the present embodiment can be increased .

The stationary bracket 500 may connect the end of the sub-blade 300 and the outer surface of the main blade 200. The fixed bracket 500 includes a first bracket 510 connected to an end of the sub blade 300 and a second bracket 520 coupled to the first bracket 510 with the main blade 200 therebetween ).

A first contact surface 511 may be formed on one surface of the first bracket 510 so as to be in close contact with one surface of the main blade 200. The other surface of the first bracket 510 may be formed on an end of the sub- And both ends of the first bracket 510 can be engaged with both ends of the second bracket 520 through fastening means (e.g., bolts, rivets, etc.). A second contact surface 521 which is in close contact with the other surface of the main blade 200 may be formed on one surface of the second bracket 520. Both ends of the second bracket 520 may be connected to the first bracket 510 As shown in Fig.

The fixing bracket 500 is tightly fixed to the main blade 200 through the first contact surface 511 of the first bracket 510 and the second contact surface 521 of the second bracket 520, It is possible to prevent the main blade 200 from being damaged when it is fixed by welding and to remove the resistance element (for example, bolting, riveting, welding, etc.) that obstructs the air flow.

FIG. 5 is a side view showing a vertical wind turbine according to an embodiment of the present invention, and FIG. 6 is a plan view showing a vertical wind turbine according to an embodiment of the present invention.

5 to 6, the generator 400 is a rotor assembly including a stator core and a rotor magnet, and can generate electric energy using the rotational force of the rotating shaft 100. [ The generator 400 corresponds to an ordinary generator that generates electricity through an electromagnetic induction action between a stator and a rotor, and therefore, a detailed description thereof will be omitted.

However, since the generator 400 according to the present embodiment is positioned at the center of gravity of the vertical wind turbine generator, the structural stability of the wind turbine generator 400 can be secured from the strong wind. In addition, since the length of the rotary shaft 100 that transmits the rotational force can be relatively short, the weight of the rotary shaft 100 can be lightened as compared with the case where the generator is located at the bottom of the vertical wind power generator.

The tower 600 may be composed of a plurality of support pipes vertically connected to each other in succession as a support for supporting the rotary shaft 100, the main blade 200, the sub-blade 300 and the generator 400. The tower 600 is connected to the rotating shaft 100 with the generator 400 interposed therebetween. The upper end of the tower 600 is kept in the inside of the vertical wind turbine generator, Type wind turbine generator.

[Example]

The results of the 20 kW output performance test through the wind turbine according to the present embodiment are shown in Table 1 below.

Item Rotation speed Print Line indirect pressure frequency Measures 80rpm 19.69 kW 358Vrms 59.64 Hz

At this time, the rotational speed of the generator 400 was limited to a range of 0 to 80 rpm, and a power meter (PPA5530) or an oscilloscope (DPO 3034) was used as the measuring instrument.

As described above, in this embodiment, since the main components such as the main blades are made of magnesium alloy material, the weight of the product can be reduced, and the main blades and the rotary shaft are connected in the form of trusses, The structure between the shafts can be stably supported and the position of the generator can be positioned at the center of gravity of the tower to secure the overall structural stability of the wind power generator.

It is to be understood that the embodiments described above are merely illustrative of some examples of the technical idea and the scope of the technical idea is not limited to the described embodiments, It will be understood that various changes, substitutions, and alterations may be made therein without departing from the spirit and scope of the invention.

100: rotating shaft 200: main blade
210: first frame 220: second frame
230: Third frame 300: Sub-blade
400: generator 500: fixed bracket
600: Tower 800: Connection frame

Claims (5)

Comprising a wind power generator main body,
The wind power generator main body includes:
A rotating shaft;
At least one main blade radially spaced apart from the rotation shaft;
At least one sub blade connecting between the rotating shaft and the main blade;
A generator for generating electric energy using a rotational force of the rotating shaft; And
And a fixing bracket connecting the end of the sub blade and the outer surface of the main blade,
The main blade
A first frame comprising a head, a second frame comprising a tail, and a third frame assembled between the first frame and the second frame to form a body part, wherein the first frame has a curvature- A first vertical surface is formed on the other side,
Wherein the sub-blade has the same shape as the first frame,
Wherein the sub-blade is disposed in a direction opposite to the head portion of the main blade,
The fixing bracket
A first bracket connected to an end of the sub blade, and a second bracket coupled to the first bracket with the main blade interposed therebetween,
On one surface of the first bracket
A first contact surface which is in close contact with one surface of the main blade is formed,
The other surface of the first bracket
A sub-blade connected to an end of the sub-
Both ends of the first bracket are engaged with both ends of the second bracket through fastening means,
On one surface of the second bracket
A second contact surface which is in close contact with the other surface of the main blade is formed,
Both ends of the second bracket
The first bracket being coupled to both ends of the first bracket via fastening means,
Wherein the fixing bracket is closely fixed to the main blade through a first contact surface of the first bracket and a second contact surface of the second bracket,
At least one of the main blades and the sub-blades is made of a magnesium alloy that is drawn and formed into an airfoil, and the sub-blade connects the main blade and the rotating shaft in a truss structure,
Wherein the main blade is made of a frame assembly in which the first frame, the second frame, and the third frame, which are drawn and formed, are assembled with one blade. delete delete delete The method according to claim 1,
Further comprising a tower for supporting the generator,
Wherein the generator is located at the center of gravity of the main body of the wind turbine generator.

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