WO2022059624A1 - Vertical shaft wind turbine and vertical shaft wind turbine generator - Google Patents

Abstract

This vertical shaft wind turbine (1) has a plurality of, for example two, blades (3) that are parallel to the vertically-extending rotational axis (O) of a rotational center member (2), wherein the blades (3) and the rotation center member (2) are joined by support members (4). The blade-side ends of the support members (4) are provided with blade end plates (8) that cover the end faces of the blades (3) and project outward to the outer periphery of the blades (3). The support members (4) and the blades (3) are joined by the blade end plates (8).

Description

Vertical axis wind turbines and vertical axis wind turbines

This application claims the priority of Japanese Patent Application No. 2020-157315 filed on September 18, 2020, and is cited in its entirety as a part of the present application by reference.

The present invention relates to a vertical axis wind turbine and a vertical axis wind power generator using the vertical axis wind turbine.

The wind power generator having a vertical axis has the feature of being quiet without depending on the wind direction. In a wind turbine having a vertical axis, a wing extending in a direction parallel to a rotation center member such as a rotation axis rotates around the axis, so a support material for connecting the wing and the rotation center member is required. This support is formed extending from the center of the rotor in the rotational centrifugal direction and is connected to the blade that produces the driving force. In a vertical axis wind turbine, this support material rotates together with the blades, so the aerodynamic characteristics of the support material and the weight of the rotor part including the blades and the support material greatly affect the energy conversion efficiency of converting wind energy into rotational energy. It is one of the factors that influence the performance. Further, in a wind power generator having a vertical axis, the lift or drag generated in the wing changes due to the vortex at the tip of the wing generated from the end of the wing and the separation of the airflow flowing on the surface of the wing, and the rotational force of the wind turbine changes. .. Controlling the vortex at the tip of the blade and the airflow flowing on the surface of the blade is a factor that affects the performance of the wind turbine.

Conventionally, various measures have been taken to improve the performance of the wind turbine.
In Patent Documents 1 and 2, a foam material is used as the material of the wing. This is a measure to reduce the mass of the wings and improve the performance of the wind turbine.
Regarding the support material for connecting the blade and the rotation shaft and transmitting the driving force of the blade to the rotation shaft, it is known that the rotational energy conversion efficiency is improved by the shape of the support material. In Patent Document 3, a wire is used in order to reduce the resistance of the support material and reduce the mass of the support material.
Further, Patent Document 4 describes a method of suppressing a vortex flow by a tip plate with respect to a tip vortex. This patent aims to change the shape of the tip plate according to the magnitude of the influence of the tip vortex at each part of the tip to obtain the optimum shape.

Japanese Unexamined Patent Publication No. 2018-168789 Japanese Unexamined Patent Publication No. 2018-003650 Japanese Unexamined Patent Publication No. 2018-135875 Japanese Unexamined Patent Publication No. 2017-066878 Japanese Unexamined Patent Publication No. 2018-150863 Japanese Unexamined Patent Publication No. 2004-293409

In a vertical axis wind turbine, it is necessary to connect the blade and the rotation center member by a support material that rotates with the blade. When the wing is fixed by the support material, the connecting part between the wing and the support material becomes a protrusion from the wing surface, and this protrusion disturbs the airflow flowing on the wing surface, induces the separation of the airflow from the wing surface, and the wind turbine. Will reduce the rotational force of.
For example, in the vertical axis wind turbines shown in FIGS. 19 to 21, a connecting plate 31 is provided at the end of the support material, the blade 3 is sandwiched between the reinforcing plate 32 and the connecting plate 31, and the blade 3 penetrates through the reinforcing plate 32 and the connecting plate 31. The support member 4 is connected to the wing 3 with bolts and nuts. In the case of this configuration, the reinforcing plate 32 and the connecting plate 31 become protrusions from the blade surface, and the rotational force of the wind turbine is reduced as described above.

Further, in order to control the blade tip vortex, for example, a tilted portion 33 is provided at the blade tip as shown in FIG. 22 (for example, Patent Document 5), or a blade end plate 34 is provided as shown in FIG. 23 (for example, patent). Document 6) Since the inclined portion 33 and the wing tip plate 34 have a shape different from the wing shape of the main wing portion, the manufacturing cost increases by changing the manufacturing process, and the performance is improved by shortening the main wing portion. There is a problem that it decreases.

An object of the present invention is a vertical axis wind turbine and a vertical axis wind turbine that can connect the blade and the support material without obstructing the airflow flowing on the blade surface, can sufficiently exhibit the original performance of the blade, and can reduce the tip loss. To provide a vertical-axis wind turbine.

The first vertical axis wind turbine of the present invention has a plurality of blades extending in a direction parallel to the rotation axis extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member. Each of the blades is a vertical axis wind turbine having a lift-type cross-sectional shape.
A wing tip plate portion that covers the end surface of the wing and projects over the outer periphery of the wing is provided at the wing-side end portion of the support member, and the support member and the wing are connected by the wing tip plate portion. ing.

According to this configuration, since the support material is connected to the wing tip plate portion that covers the end face of the wing, there is no protrusion from the surface at the connection portion between the wing and the support material, and it is a part for connecting. The wing and the support material can be connected without obstructing the airflow flowing on the wing surface, and the original performance of the wing can be fully exhibited. Further, since the wing tip plate portion covers the end surface of the wing and projects to the outer periphery of the wing, the wing tip vortex is suppressed and the effect of the wing tip plate can be exhibited. As a result, the power generation performance of the wind power generation device can be improved.
In this way, it is possible to prevent the airflow from being obstructed at the connecting portion between the blade and the support material, and it is possible to obtain a synergistic effect that the vortex at the tip of the blade can be suppressed.

In the present invention, the wing is a wing-shaped member having a solid or hollow outer peripheral surface formed in the shape of the wing, and the wing-shaped member embedded in a part or the whole in the longitudinal direction of the wing-shaped member. It may have a core material protruding from the end face, and the core material and the blade end plate portion may be joined to each other.
By providing the core material on the blade in this way and connecting the core material to the support material, the hard core material can increase the strength of the wind turbine blade against the centrifugal force during rotation. In addition, this facilitates the connection between the wing and the support material, and this configuration also reduces the protrusions on the wing surface that hindered power generation performance, changes the shape of the support material, and reduces the number of parts. Therefore, the resistance inside the wind turbine can be reduced.

In the present invention, the support material is provided in the middle of the blade in the length direction, and the intermediate support material is provided with a cover portion that covers the entire circumference of the outer circumference in a part of the blade in the length direction. The support member and the wing may be connected by the cover portion.
By providing a support material in the middle in the length direction of the wing, a long wing can be supported. For example, it is possible to construct a multi-stage vertical axis wind turbine in which a plurality of split blades are connected in the length direction to form one continuous blade.
Since the cover part, which is a member used to connect the support material and the wing, covers the entire circumference of the outer circumference with a part in the length direction of the wing, it obstructs the air flow as compared with the configuration in which the local connecting plate is overlapped on the wing. It is possible to fully demonstrate the original performance of the wing.

The second vertical axis wind turbine of the present invention has a plurality of blades extending in a direction parallel to the rotation axis extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member. Each of the blades is a vertical axis wind turbine having a lift-type cross-sectional shape.
A cover portion is provided at the end of the support material on the wing side to cover the entire circumference of the outer circumference at a part in the length direction of the wing, and this cover portion projects from the wing over the entire circumference of the outer circumference. It has a rectifying plate portion, and the support member and the blade are connected by the cover portion.
In the case of this configuration, since the cover portion used for connecting the support material and the wing covers the entire circumference of the outer circumference at a part in the length direction of the wing, compared with the configuration in which the local connecting plate for the entire circumference is overlapped on the wing. It does not obstruct the airflow and can fully demonstrate the original performance of the wing. Further, since the cover portion has a rectifying plate portion protruding from the blade over the entire circumference of the outer circumference, it is possible to suppress the tip vortex, and the effect of the tip plate can be exhibited.

Since the vertical axis wind power generator of the present invention includes a vertical axis wind turbine having any of the above configurations of the present invention and a generator that generates electricity by the rotation of the vertical axis wind turbine, the airflow flowing through the blade surface in the vertical axis wind turbine is provided. The blade and the support material can be connected without hindering the blade, and the original performance of the blade can be fully exhibited, the blade tip loss can be reduced, and the power generation efficiency is improved.

Any combination of claims and / or at least two configurations disclosed in the specification and / or drawings is included in the invention. In particular, any combination of two or more of each claim is included in the invention.

The first vertical axis wind power generator of the present invention has a plurality of blades extending in a direction parallel to the rotation axis extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member. Each of the blades is a vertical axis wind turbine having a lift-type cross-sectional shape, and a blade end plate portion that covers the end surface of the blade and projects to the outer periphery of the blade is provided at the end of the support material on the blade side. Since the support material and the blade are connected at the blade end plate portion, the blade and the support material can be connected without obstructing the airflow flowing on the blade surface, and the original performance of the blade is fully exhibited. At the same time, it is possible to reduce the blade tip loss.

The second vertical axis wind power generator of the present invention has a plurality of blades extending in a direction parallel to the rotation axis extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member. A vertical axis wind turbine in which each wing has a lift-type cross-sectional shape, and a cover at the end of the support member on the wing side, which covers the entire circumference of the outer circumference at a part in the length direction of the wing. A portion is provided, and this cover portion has a rectifying plate portion protruding from the wing over the entire circumference of the outer circumference, and the support member and the wing are connected by the cover portion, so that the airflow flowing on the wing surface is obstructed. The wing and the support material can be connected without any trouble, and the original performance of the wing can be fully exhibited and the wing tip loss can be reduced.

Since the vertical axis wind power generator of the present invention includes a vertical axis wind turbine having any of the above configurations of the present invention and a generator that generates electricity by the rotation of the vertical axis wind turbine, the airflow flowing through the blade surface in the vertical axis wind turbine is provided. The blade and the support material can be connected without hindering the blade, and the original performance of the blade can be fully exhibited, the blade tip loss can be reduced, and the power generation efficiency is improved.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, embodiments and drawings are for illustration and illustration purposes only and should not be used to define the scope of the invention. The scope of the invention is determined by the appended claims. In the accompanying drawings, the same part number in multiple drawings indicates the same or equivalent part.
It is a perspective view of the vertical axis wind turbine which concerns on 1st Embodiment of this invention. It is a partially enlarged exploded perspective view of the vertical axis wind turbine. It is an exploded perspective view which shows the relationship between the blade shape member and the core material of the vertical axis wind turbine. It is a perspective view of an example of the vertical axis power generation apparatus provided with the same vertical axis wind turbine. It is a perspective view of the vertical axis wind turbine which concerns on 2nd Embodiment of this invention. It is a top view which shows the support material and the cover part in the vertical axis wind turbine. It is an exploded perspective view which shows the relationship between the cover part of the vertical axis wind turbine, and a split wing. It is a perspective view of the assembled state of the cover part of the vertical axis wind turbine and the split wing. It is a perspective view of the vertical axis wind turbine which concerns on 3rd Embodiment of this invention. It is an exploded perspective view of the modification which shows the relationship between a blade shape member and a core material. It is an exploded perspective view of another modification which shows the relationship between a blade shape member and a core material. It is a perspective view of the vertical axis wind turbine which concerns on 4th Embodiment of this invention. It is a perspective view of the vertical axis wind turbine which concerns on 5th Embodiment of this invention. It is a perspective view of the vertical axis wind turbine which concerns on 5th Embodiment of this invention, and is a partially enlarged exploded perspective view thereof. It is a figure which shows the 1st example of the cross-sectional shape of the core material end portion at the time of fixing a core material of the vertical axis wind turbine with a bolt. It is a figure which shows the 2nd example of the cross-sectional shape of the core material end portion at the time of fixing the core material of the vertical axis wind turbine with a bolt. FIG. 3 is a third view showing a cross-sectional shape of an end portion of the core material when the core material of the vertical axis wind turbine is fixed with a bolt. It is a perspective view of the vertical axis wind turbine which concerns on 6th Embodiment of this invention. It is a partially enlarged exploded perspective view of the vertical axis wind turbine. It is a perspective view of the vertical axis wind turbine which concerns on 7th Embodiment of this invention. It is a perspective view of the vertical axis wind turbine which concerns on 8th Embodiment of this invention. It is a perspective view of the vertical axis wind turbine which concerns on 9th Embodiment of this invention. It is a perspective view which shows an example of the conventional vertical axis wind turbine. FIG. 19 is a partially enlarged exploded perspective view of FIG. It is a perspective view of the assembled state of the same part. It is a perspective view which shows the other example of the conventional vertical axis wind turbine. It is a perspective view which shows still another example of the conventional vertical axis wind turbine.

The vertical axis wind turbine and the vertical axis power generation device according to the first embodiment of the present invention will be described together with FIGS. 1 to 4.
The vertical axis wind turbine 1 has a plurality of blades 3 extending in a direction parallel to the rotation axis O extending in the vertical direction of the rotation center member 2, and each blade 3 and the rotation center member 2 are connected by a support member 4. The plurality of blades 3, the rotation center member 2, and the support member 4 form a rotor 5 which is a rotary blade. The vertical axis wind turbine 1 is composed of a rotor 5 and a member that supports the rotor 5, for example, a support column 6 which will be described later with reference to FIG. Although the number of blades 3 is two in this embodiment, three or more blades 3 may be provided side by side in the rotation direction.

The rotation center member 2 is composed of a rotation axis extending in the vertical direction, and is rotatably supported on the upper end of the support column 6 via a bearing (not shown) as shown in FIG. The rotation center member 2 is connected to or integrated with the rotation input portion of the generator 7. The vertical axis wind turbine 1 and the generator 7 constitute a vertical axis power generator. A speed increaser, a mechanical brake, or the like (neither of them is shown) may be provided between the rotation center member 2 and the generator 7. The support column 6 is configured in a pole shape, for example, as shown in the figure, or is configured as a steel tower.

The support member 4 is provided with a wing tip plate portion 8 that covers the end surface of the wing 3 and projects over the entire circumference of the wing at the end portion on the wing 3 side, and the connection between the support member 4 and the wing 3 is the wing tip. It is done in the plate part 8. The outer peripheral shape of the wing tip plate portion 8 is, for example, a shape similar to the cross-sectional shape of the wing 3, or a shape that projects from the outer circumference of the wing 3 over the entire circumference by the same overhang width. The support material 4 is made of a metal plate or the like, and has a flat plate shape over the wing tip plate portion 8. In this embodiment, it is formed in a flat plate shape, but other shapes such as streamline may be used except for the wing tip plate portion 8 of the support member 4.
The support members 4 of the plurality of blades 3 are connected to a common base end side connecting portion 9 at the base end. The base end side connecting portion 9 is connected to the end surface of the axial rotation center member 2.

As shown in FIG. 3, the wing 3 has a wing-shaped member 13 whose outer peripheral surface is formed in the shape of the wing 3 and a wing-shaped member 13 embedded in a part or the whole of the wing-shaped member 13 in the longitudinal direction. It has a core material 14 protruding from the end surface of the blade, and the blade 3 and the support material 4 are connected by joining the core material 14 and the blade end plate portion 8. The wing 3 has a lift-type cross-sectional shape.
The blade-shaped member 13 is solidly formed of a resin material or the like, and an insertion hole 15 through which the core material 14 is passed is provided so as to extend in the axial direction. The blade-shaped member 13 may be hollow. When the blade is hollow, a plurality of ribs constituting the cross-sectional shape of the blade 3 are attached to a beam-shaped member extending in the blade length direction, and a face material (none of which is shown) constituting the blade surface is attached to the rib. Can be installed. The insertion hole 15 is provided in each rib. The core material 14 is made of a metal rod or the like, and is inserted through the blade-shaped member 13 over its entire length.

The core material 14 is made of a material that is harder than the blade-shaped member 13, such as a metal rod. The number of core materials 14 may be one or a plurality, but in this example, it is two. For the connection between the core material 14 and the blade end plate portion 8, the end portion of the core material 14 is inserted into the connecting hole 16 provided in the blade end plate portion 8, and the end portion of the core material 14 is plastically deformed to an enlarged diameter state. It may be done by such a thing, or it may be done by using a screw member or an appropriate fastener (not shown). The core material 14 does not necessarily have to be provided over the entire length of the blade-shaped member 13, and may be buried only in a part of the blade-shaped member 13 in the length direction.

According to this configuration, the support member 4 extending from the rotation center member 2 in the centrifugal direction of rotation of the wind turbine and the blade 3 are joined at the blade tip portion, and the blade end plate portion 8 is provided on the support member 4 to join the blade tip portion. The shape of the support member 4 in the portion has an area larger than the cross section of the wing 3 and has a plate-like shape protruding from the wing cross section.
By joining in this way, the support member 4 and the blade 3 can be connected without providing unevenness on the blade surface of the blade 3. Further, the plate-shaped blade end plate portion 8 has an area larger than the blade cross section and protrudes from the blade cross section. By providing such a wing tip plate portion 8 at the end portion of the wing 3, it is possible to suppress the wing tip vortex, and it is possible to obtain the effect of the wing tip plate.

By eliminating the unevenness of the blade surface in this way, the original performance of the blade can be fully exhibited, the decrease in the conversion efficiency of rotational energy is suppressed, and the shape of the support member 4 at the blade tip is made larger than the shape of the blade tip. Therefore, the blade tip loss can be reduced.

Further, the wing 3 is a wing-shaped member 13 which is solid or hollow and whose outer peripheral surface is formed in the shape of the wing 3, and the wing-shaped member 13 which is embedded in a part or the whole of the wing-shaped member 13 in the longitudinal direction. It has a core material 14 protruding from the end face, and the core material 14 and the blade end plate portion 8 are joined to each other.
By providing the core material 14 on the blade 3 in this way and connecting the core material 14 to the support material 4, the strength of the blade 3 can be increased against the centrifugal force during rotation. In addition, this facilitates the connection between the blade 3 and the support material 4, and this configuration also reduces the convex portion of the blade surface that hinders the power generation performance, changes the shape of the support material 4, and reduces the number of parts. It becomes possible and the resistance inside the wind turbine can be reduced.

Table 1 below compares the analysis results of the assembling property, the tip plate effect, the air resistance, the centrifugal force, etc. of the example in which the area of the tip plate composed of the tip plate portion 8 is different. It is a figure.
As shown in the table, the assemblability is good except for the example in which the slab area is set to 200%, which is the largest. The tip plate effect was obtained satisfactorily as long as it was the minimum tip plate area (125%) or more in the table. The air resistance becomes large when the slab area is 175% or more, which is somewhat unfavorable. Centrifugal force becomes slightly unfavorable when the wing tip plate area is 175%, and is not preferable when the wing tip slab area is 200%.

 

Hereinafter, other embodiments of the present invention will be shown. These embodiments are the same as those of the first embodiment described with FIGS. 1 to 4, except for the matters described in particular.

In the embodiment shown in FIGS. 5 to 7, a support member 4A is provided in the middle of the blade 3 in the length direction, and the support member 4A in the middle is a part of the blade 3 in the length direction and the entire circumference of the outer circumference. A cover portion 17 (see FIG. 7) is provided to cover the cover portion 17, and the support member 4A and the wing 3 are connected by the cover portion 17. The cover portion 17 has a straightening vane portion 19 protruding from the blade 3 over the entire circumference of the outer circumference.

In the case of this configuration, the support member 4A is provided in the middle of the blade 3 in the length direction, so that the long blade 3 can be supported with sufficient strength. For example, as shown in FIG. 5, a multi-stage vertical axis wind turbine can be configured in which the blades 3 are connected to a plurality of split blades 3A in the length direction to form one continuous blade 3.
Since the cover portion 17, which is a member used for connecting the support member 4 and the wing 3, covers the entire circumference of the outer circumference of the wing 3, compared with the conventional configuration in which the local connecting plate 31 (see FIG. 20) is overlapped on the wing 3. The airflow is less likely to be obstructed, and the original performance of the wing 3 can be fully exhibited. Further, since the cover portion 17 has a rectifying plate portion 19 protruding from the blade 3 over the entire circumference of the outer circumference, the rectifying plate portion 19 has a rectifying effect as a boundary layer plate between the upper and lower split blades 3A and 3A. You can expect it. As a result, the decrease in efficiency of conversion from wind energy to rotational energy is suppressed.

The third embodiment shown in FIG. 8 is an example in which the support member 4 having the cover portion 17 is connected to the end portion of the wing 3. In this example, a cover portion 17 is provided at the end of the support member 4 on the wing 3 side to cover the entire circumference of the outer circumference at a part in the length direction of the wing 3, and the cover portion 17 covers the entire outer circumference. It has a rectifying plate portion 19 protruding from the blade 3 over the circumference, and the support member 4 and the blade 3 are connected by a cover portion 17.
In the case of this configuration, since the cover portion 17 covers the entire circumference of the outer circumference of the blade 3, the blade 3 and the support member 4 can be connected without obstructing the airflow flowing on the blade surface, and the original performance of the blade is fully exhibited. can. Further, since the straightening vane portion 19 is provided, the blade tip loss can be reduced.

When the blade 3 is composed of the blade-shaped member 13 (see FIG. 3) and the core material 14 as described above, and when a material having a certain degree of rigidity is used for the blade-shaped member 13, as shown in FIG. The core material 14 may be provided at both ends of the blade 3 with a part of the blade length, for example, a core material 14 having a length of about 1/3 with respect to the blade length.

Further, as shown in FIG. 10, the core material 14 may be provided exposed on the surface of the blade 3. In this case, a mating groove 21 is provided on the outer surface of the blade-shaped member 13, and the core material 14 is embedded in a state of being exposed on the surface of the blade-shaped member 13. The cross-sectional shape of the core material 14 is not limited to a circle, but may be a polygon or any other shape. Further, the core material 14 may be solid or hollow. However, when the core material 14 is exposed on the surface of the blade 3, it is preferable that the surface of the core material 14 has a shape along the surface of the blade 3 in order to reduce the convex portion that hinders the performance of the blade 3.

The fourth embodiment shown in FIG. 11 shows a case where the rotation center member 2 is not axial but is located at the center of the rotor 5 which is an impeller in the vertical direction. In this case, the support member 4 extends up and down in an oblique direction and is connected to the end portion of the blade 3 by the blade end plate portion 8.
The present invention can also be applied to this type of vertical axis wind turbine.

A fifth embodiment shown in FIGS. 12A and 12B shows an example in which the support member 4 and the core member 14 are fastened with bolts in the vertical axis wind turbine having the configuration of FIG.
As shown in the figure, if the support material 4 and the core material 14 are fixed with bolts 22, they can be fixed more firmly. The core material 14 may be solid or hollow, but when the core material 14 is solid, screw portions are provided at both ends and fixed with bolts 22. The bolt 22 is preferably a type of bolt having a smooth head, such as a low head bolt, a button bolt, or an ultra-low head bolt. When the core material 14 is hollow, it is fixed by providing screw portions at both ends as in the case of solid, or by using an attachment having screw portions (for example, POP rivet, nut rivet, etc.). At this time, the shape of the core material 14 is preferably circular when an attachment having a screwed portion is used.

13A to 13C show examples of various cross-sectional shapes of the end portion of the core material 14 when the core material 14 is bolted.
FIG. 13A is an example in which the screw hole 23 is provided at the end of the core material 14.
FIG. 13B is an example in which the core material 14 is hollow and the female screw portion 24 is provided at the end.
FIG. 13C is an example in which the core material 14 is hollow and the attachment 25 having a female threaded portion at the end is fitted and fixed.

The sixth embodiment shown in FIG. 14 shows an example in which the core material 14 is provided in a vertical axis wind turbine having a structure in which the support material 4 is slanted as shown in FIG. In this case, as shown in FIG. 15, a solid or hollow component 26 is attached to the support member 4 and passed through the inside or the outer periphery of the core member 14. As a result, when the support material 4 and the core material 14 are fastened, the support material 4 can be attached without forming a convex portion.

As shown in the seventh embodiment of FIG. 16 and the eighth embodiment of FIG. 17, when the core material 14 is provided on the outer periphery of the rotor of the blade 3, a groove is formed on the outer periphery of the blade 3 and the core material 14 is provided. And attach the support material 4. The core material 14 and the support material 4 may be fastened as shown in FIG. In the seventh embodiment shown in FIG. 16, the core material 14 does not penetrate the wing tip plate portion 8, but in the eighth embodiment shown in FIG. 17, the core material 14 penetrates the wing tip plate portion 8. ..

Further, when the rotation center member 2 is configured to be located at the center in the vertical direction of the rotor, as shown in the ninth embodiment of FIG. 18, the rotation center member 2 and the blade 3 are formed by a horizontal support member 4. It may be connected.

Although the embodiments for carrying out the present invention have been described above based on the embodiments, the embodiments disclosed this time are exemplary in all respects and are not limiting. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. That is, the present invention is not limited to the above embodiments, and various additions, changes, or deletions can be made without departing from the gist of the present invention.

1 ... Vertical axis wind turbine 2 ... Rotation center member 3 ... Wing 4 ... Support material 4A ... Support material 5 ... Rotor 6 ... Support 7 ... Generator 8 ... Blade end plate 17 ... Cover 19 ... Rectifier plate O ... Rotation shaft heart

Claims (5)

1. It has a plurality of blades extending in a direction parallel to the axis of rotation extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member, and each blade has a lift-type cross-sectional shape. It ’s a vertical axis windmill,
   A wing tip plate portion that covers the end surface of the wing and projects over the outer periphery of the wing is provided at the wing-side end portion of the support member, and the support member and the wing are connected by the wing tip plate portion. Vertical axis wind turbine.
2. In the vertical axis wind turbine according to claim 1, the blade is embedded in a blade-shaped member having a solid or hollow shape and an outer peripheral surface formed in the shape of the blade, and a part or the whole of the blade-shaped member in the longitudinal direction. A vertical axis wind turbine having a core material protruding from the end surface of the blade-shaped member, and the core material and the blade end plate portion joined to each other.
3. In the vertical axis wind turbine according to claim 1 or 2, the support member is provided in the middle of the length direction of the blade, and the support member in the middle is a part of the outer circumference in the length direction of the blade. A vertical-axis wind turbine provided with a cover portion that covers the entire circumference of the wind turbine, and the support member and the wing are connected by the cover portion.
4. It has a plurality of blades extending in a direction parallel to the axis of rotation extending in the vertical direction of the rotation center member, and each blade and the rotation center member are connected by a support member, and each blade has a lift-type cross-sectional shape. It ’s a vertical axis windmill,
   A cover portion is provided at the end of the support material on the wing side to cover the entire circumference of the outer circumference at a part in the length direction of the wing, and this cover portion projects from the wing over the entire circumference of the outer circumference. A vertical-axis wind turbine having a rectifying plate portion and having the support member and the blade connected by the cover portion.
5. A vertical-axis wind power generator comprising the vertical-axis wind turbine according to any one of claims 1 to 4 and a generator that generates electricity by rotating the vertical-axis wind turbine.

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