JP7392926B2 - Floating vertical axis wind turbine and floating vertical axis wind turbine power generation system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floating vertical axis wind turbine that is floated on the sea or the like and rotated by wind power, and a floating vertical axis wind turbine power generation system.

Conventionally, a floating natural energy extraction device has been disclosed (Patent Document 1). In the natural energy extraction device shown in Patent Document 1, a power transmission device attached to a second floating body surrounding a first floating body forming a swingable vertical rotation axis transfers the rotational kinetic energy of the first floating body to a driven device. This converts it into driving torque.

Patent No. 5818743

However, the invention described in Patent Document 1 is a device that has achieved miniaturization, and since the rotating shaft and the members near the rotating shaft form a floating body, there is a risk that the balance will be lost if the device is enlarged. be.

An object of the present invention is to provide a floating vertical axis wind turbine and a floating vertical axis wind turbine power generation system that can rotate stably even if the wind turbine is large.

A floating vertical axis wind turbine according to an embodiment of the present invention includes:
a first floating body that is axially symmetrical about the rotation axis;
a shaft extending coaxially from the first floating body;
a first coupling part installed on the outer periphery of the shaft;
an arm portion having one end attached to the first coupling portion and extending from the shaft;
a wind blower attached to the other end of the arm;
a second connecting portion that connects the arm portion and the wind blowing portion;
a second floating body attached to the lower end of the wind receiving section;
It is characterized by having the following.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
The maximum horizontal cross-sectional area of the second floating body below the water surface is larger than the water line area.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
A plurality of the arm portions extend radially from at least above and below the shaft,
The first coupling part and the second coupling part are configured to be rotatable about an axis perpendicular to a rotation axis of the shaft and a longitudinal direction of the arm part.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
When the arms form the same angle, a center line connecting the leading edge and the trailing edge of the second floating body is on a circumference centered on the rotation axis of the shaft.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
The wind receiving section has an airfoil shape in a cross section perpendicular to the rotation axis of the shaft.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
When the arm portions form the same angle, a center line connecting the front edge and the rear edge of the wind blowing portion is on a circumference centered on the rotation axis of the shaft.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
The wind receiving part is
a cylindrical portion rotatable in an axis parallel to the rotational axis of the shaft;
a current plate that rotatably supports both ends of the shaft of the cylindrical portion and is installed in parallel with the cylindrical portion with a gap therebetween;
has
the second coupling portion is coupled to the current plate;
The second floating body is attached to the lower end of the current plate.

Furthermore, in the floating vertical axis wind turbine according to an embodiment of the present invention,
The wind receiving section is
A cup-shaped bottom installed on the side in the direction of travel,
an extension extending from an end of the bottom portion located far from the rotation axis;
has
The second coupling part is coupled to a side of the rotation shaft of the extension part.

Furthermore, a floating vertical axis wind turbine system according to an embodiment of the present invention includes:
The floating vertical axis wind turbine;
a mooring section mooring the shaft;
a generator that generates electricity using the rotation of the shaft as rotational force;
Equipped with

A floating vertical axis wind turbine and a floating vertical axis wind turbine power generation system according to an embodiment of the present invention can rotate stably even if they are large.

1 shows a floating vertical axis wind turbine according to a first embodiment. The wind receiving part and the 2nd floating body are shown when the floating vertical axis type wind turbine according to the first embodiment is viewed from above. 1 shows a mooring section for mooring a floating vertical axis type wind turbine according to a first embodiment. 1 shows a support portion of a floating vertical axis wind turbine according to a first embodiment. 1 shows a usage state of the floating vertical axis type wind turbine according to the first embodiment. FIG. 7 shows a second floating body of a floating vertical axis wind turbine according to another embodiment. 7 shows the second floating body of the embodiment of FIG. 6 seen from above; FIG. The wind receiving part of the floating vertical shaft type wind turbine according to the second embodiment is shown. 9 shows the wind blowing section of the second embodiment of FIG. 8 viewed from above. 11 shows a wind receiving section of a floating vertical axis wind turbine according to a third embodiment. 11 shows the wind receiving section of the third embodiment of FIG. 10 viewed from above.

Specific embodiments of the present invention are shown below. The embodiment is just an example and is not limited to this example.

FIG. 1 shows a floating vertical axis wind turbine 1 according to a first embodiment.

The floating vertical axis wind turbine 1 includes a first floating body 2 that is axially symmetrical with respect to the rotation axis A, a shaft 3 extending coaxially from the first floating body 2, and a first coupling part 4 installed on the outer periphery of the shaft 3. , an arm portion 5 having one end 5a attached to the first coupling portion 4 and extending radially with respect to the shaft 3; a wind blowing portion 6 rotatably attached to the other end 5b of the arm portion 5; It includes a second connecting part 7 that connects the wind receiving part 6, and a second floating body 8 attached to the lower end of the wind receiving part 6.

The first floating body 2 is a columnar member, has buoyancy, and includes a weight 2a below. The weight 2a is placed on the first floating body 2 in consideration of weight and the like. It is preferable that the upper part of the first floating body 2 protrudes from the water surface when the entire floating vertical axis wind turbine 1 is floated on a still water surface, and the rotation axis A is in a vertical direction.

The shaft 3 is a cylindrical member and coaxially extends upward from the first floating body 2 . The shaft 3 rotates together with the first floating body 2. It is preferable that the connecting portion between the shaft 3 and the first floating body 2 is formed so that the first floating body 2 has a larger diameter.

The first coupling portion 4 includes an annular portion 4a surrounding the outer periphery of the shaft 3, and a protruding portion 4b protruding from the annular portion 4a. It is preferable that the protrusions 4b are formed radially at equal intervals with respect to the rotation axis A. In this embodiment, the protrusions 4b are formed radially every 120 degrees with respect to the rotation axis A. It is preferable that the first coupling portions 4 are installed at two locations, one above and one below the shaft 3. Note that the first coupling portions 4 may be installed at three or more locations on the shaft 3.

The arm portion 5 extends radially from the first coupling portion 4 with respect to the rotation axis A. In this embodiment, the arm portions 5 are formed radially every 120° with respect to the rotation axis A, similar to the protrusion portion 4b. One end 5a of the arm portion 5 and the protrusion 4b are rotatable by a structure in which one side forms a shaft and the other forms a bearing, or a structure in which both form a bearing and are connected by a shaft such as a connecting pin of a separate member. A first hinge mechanism is configured. It is preferable that the first hinge mechanism rotates the arm portion 5 with respect to the first coupling portion 4 with the tangential direction of the outer periphery of the shaft 3 as the first rotation axis B in a cross section orthogonal to the rotation axis A.

FIG. 2 shows the wind receiving section 6 and the second floating body 8 when the floating vertical axis wind turbine 1 according to the first embodiment is viewed from above. Note that FIG. 2 shows a case where all the arm portions 5 form the same angle by the plurality of first hinge mechanisms and the plurality of second hinge mechanisms.

The wind receiving section 6 is attached to the other end 5b of the arm section 5 via the second coupling section 7. The wind receiving section 6 is formed in a shape that propels the wind when it receives wind. When all the arm parts 5 form the same angle by the plurality of first hinge mechanisms and the plurality of second hinge mechanisms, the center line 6c connecting the front edge 6a and the rear edge 6b in the horizontal cross section of the wind receiving part 6 is Preferably, it is on the circumference of a circle D centered on the rotation axis A. The wind receiving section 6 of this embodiment is formed into an airfoil shape.

A second coupling section 7 is installed in the wind receiving section 6 . The second connecting portion 7 and the other end 5b of the arm portion 5 are rotated by a structure in which one side forms a shaft and the other forms a bearing, or a structure in which both form a bearing and are connected by a shaft such as a connecting pin of a separate member. A freely movable second hinge mechanism is configured. It is preferable that the second hinge mechanism rotates the arm portion 5 with respect to the second coupling portion 7 about a second rotation axis C parallel to the first rotation axis B.

The second floating body 8 is attached to the lower end of the wind receiving section 6 . When all the arm parts 5 form the same angle by a plurality of first hinge mechanisms and a plurality of second hinge mechanisms, the second floating body 8 is constructed in the circumferential direction of a circle D centered on the rotation axis A or in the circle D A shape having a center line F in a tangential direction E is preferable. The second floating body 8 of this embodiment is formed into a boat shape having a centerline F in a tangential direction E of a circle D.

The second floating body 8 may have a resistance portion 8a installed on at least one of the inner surface on the side of the rotation axis A or the outer surface on the opposite side. The resistance portion 8a is normally housed on the inner or outer surface of the floating body portion 8, and opens from the inner or outer surface of the floating body portion 8 when the rotation is stopped to generate a rotational resistance force.

FIG. 3 shows a mooring section 10 for mooring the floating vertical axis wind turbine 1 according to the first embodiment.

The floating vertical axis wind turbine 1 is moored by a mooring section 10 so as not to drift. The mooring section 10 includes a polygonal frame 11, a support section 12 attached to the frame 11, a rotating body 13 rotatably supported by the support section 12, and a connecting section 14 that anchors the frame 11 to the seabed or the ground. has.

The frame 11 is installed so as to surround the shaft 3 in a plane. The frame 11 is preferably formed into a polygonal shape. The frame 11 of this embodiment is formed in a triangular shape. A holding portion 11a that holds the connecting portion 14 is formed at the apex of the frame 11. A support portion 12 is attached to a side portion of the frame 11.

FIG. 4 shows the support part 12 of the floating vertical axis wind turbine 1 according to the first embodiment.

The support portion 12 is installed on the inner side of the frame 11 and rotatably supports the rotating body 13. Three supporting parts 12 of this embodiment are installed corresponding to the inner side of the triangular frame 11, and are formed by a gimbal mechanism with three rotational degrees of freedom in the directions of arrows X, Y, and Z shown in FIG. be done. Note that the support portion 12 only needs to be able to support at least the rotation of the rotating body 13 in the Z direction. Further, it is preferable that the support portion 12 is biased in a direction away from the frame 11.

The rotating body 13 is rotatably supported by the support portion 12 . The rotating bodies 13 of this embodiment are disk-shaped rollers, and three of them are installed on the outer periphery of the shaft 3, and contact the shaft 3 at intervals of 120 degrees around the rotation axis A.

Since the rotating body 13 of the first embodiment is supported by the support part 12 with three rotational degrees of freedom, the rotating body 13 can change its attitude while contacting the shaft 3. For example, the floating vertical axis wind turbine 1 can rotate, move vertically, and tilt with respect to the mooring section 10.

The connecting portion 14 connects the frame 11 to the seabed or the ground so that the floating vertical axis wind turbine 1 does not drift. The connecting portion 14 of the first embodiment is formed of a cable-like member such as a cable or wire. Note that the connecting portion 14 may be a chain or the like. The connecting portion 14 is connected to the seabed or the ground by an anchor or the like (not shown).

The rotating body 13 of the mooring section 10 may constitute a generator 15. The generator 15 generates electricity by rotating the shaft 3 and the rotating body 13 . The generated electrical energy is sent to power transmission equipment or the like through a cable serving as the connecting portion 14.

A third floating body (not shown) may be installed in the mooring section 10. When installing the third floating body on the mooring section 10, it is preferable to install it on the frame 11.

FIG. 5 shows how the floating vertical axis wind turbine 1 according to the first embodiment is used.

The floating vertical shaft type wind turbine 1 is moored to a mooring section 10 and floated on a water body W. When the water area W is calm with few waves, most of the first floating body 2 sinks into the water W1 due to the weight of the shaft 3 and the weight 2a, and the upper part rises above the water surface W2 and becomes substantially vertical with the shaft 3. To position. The second floating body 8 floats on the water surface W2, and the angles of the arm portions 5 at the first joint portion 4 and the second joint portion 7 change depending on the height of the second floating body 8. Since the angle of the arm portion 5 at the first joint portion 4 and the second joint portion 7 changes, the wind receiving portion 6 becomes substantially parallel to the shaft 3. Therefore, the floating vertical axis type wind turbine 1 is accurately moored to the mooring section 10 and stably floats on the water body W.

When the waves are high, the first floating body 2 may tilt. Even if the first floating body 2 is tilted, the second floating body 8 floats on the water surface W2, and the angle of the arm portion 5 at the first joint 4 and the second joint 7 corresponds to the height of the second floating body 8. The wind receiving portion 6 becomes substantially parallel to the shaft 3. Therefore, the floating vertical axis type wind turbine 1 is accurately moored to the mooring section 10 and stably floats on the water body W.

When the first floating body 2 floats a lot, the frame 11, the support part 12, and the rotating body 13 contact the upper surface of the first floating body 2 and are lifted. The difference in height between the first floating body 2 and the second floating body 8 corresponds to the angle of the arm portion 5 at the first connecting portion 4 and the second connecting portion 7. For example, the first connecting portion 4, the arm portion 5, and the second connecting portion 7 may be located at higher positions in this order.

When the first floating body 2 sinks significantly, the frame 11, the support part 12, and the rotating body 13 move upward relative to the shaft 3. Note that when a floating body (not shown) is installed on the mooring section 10, the frame 11, the support section 12, and the rotating body 13 will be in a state of floating on the water surface W2 while contacting the shaft 3. The difference in height between the first floating body 2 and the second floating body 8 corresponds to the angle of the arm portion 5 at the first connecting portion 4 and the second connecting portion 7. For example, the second coupling portion 7, the arm portion 5, and the first coupling portion 4 may be located at higher positions in this order.

FIG. 6 shows a second floating body 80 of a floating vertical axis wind turbine 1 according to another embodiment. FIG. 6(a) is a perspective view of the second floating body 80 of the floating vertical axis wind turbine 1 according to another embodiment, and FIG. 6(b) is a perspective view of the second floating body 80 of the floating vertical axis wind turbine 1 according to another embodiment. A sectional view perpendicular to the traveling direction of the second floating body 80 is shown. FIG. 7 shows the second floating body 80 of the embodiment of FIG. 6 viewed from above.

The second floating body 80 of the embodiment shown in FIG. 6 includes a protrusion 81 attached to the lower end of the wind receiving part 6 and a body 82 below the protrusion 81. When all the arm parts 5 form the same angle by the plurality of first hinge mechanisms and the plurality of second hinge mechanisms, the protrusion part 81 and the body part 82 form a circle D centered on the rotation axis A in a horizontal section. A shape having a center line 80c connecting the front edge 81a and the rear edge 81b on the circumference of the circle D or on the tangent E of the circle D is preferable. The protruding portion 81 and the body portion 82 of this embodiment are formed in a shape having a center line 80c on the circumference of a circle D connecting the front edge 81a and the rear edge 81b.

It is preferable that the protruding part 81 has substantially the same shape as the wind blowing part 6 when viewed from above, and has a rectangular shape in a cross section perpendicular to the traveling direction. It is preferable that the body part 82 has substantially the same shape as the wind blowing part 6 when viewed from above, and has a circular shape in a cross section perpendicular to the traveling direction.

The body 82 propels W1 underwater like a submarine. Further, at least a portion of the protruding portion 81 propels the water above the water surface W2, and the remaining portion propels the water W1 underwater. Therefore, the water line area of the second floating body 80 on the water surface W2 is smaller than the maximum horizontal cross-sectional area of the second floating body 80 on the water surface W1.

A resistance portion 80a may be installed on at least one of the inner surface on the rotation axis A side or the outer surface on the opposite side of the protruding portion 81 or the body portion 82 of the second floating body 80. The resistance portion 80a is normally housed on the inner or outer surface of the floating body portion 80, and opens from the inner or outer surface of the floating body portion 80 when the rotation is stopped to generate rotational resistance force.

FIG. 8 shows a wind receiving section 60 of a floating vertical axis wind turbine 1 according to the second embodiment. FIG. 9 shows the wind blower 60 of the second embodiment of FIG. 8 viewed from above.

A wind receiving section 60 according to the second embodiment shown in FIG. 8 includes a cylindrical cylindrical section 61 and a rectifying plate 62 that rotatably supports the cylindrical section 61. Both ends of the axis G of the cylindrical portion 61 are rotatably supported by the current plate 62 . The current plate 62 is formed into a plate shape, is installed in parallel with the cylindrical part 61 with a gap therebetween, and has extension parts 62a that support the cylindrical part 61 at both ends in the longitudinal direction.

The current plate 62 is attached to the other end 5b of the arm portion 5 via the second coupling portion 7. The second coupling portion 7 and the other end 5b of the arm portion 5 form a rotatable second hinge mechanism, with one forming a shaft and the other forming a bearing. It is preferable that the second hinge mechanism rotates the arm portion 5 with respect to the second coupling portion 7 about a second rotation axis C parallel to the first rotation axis B.

The rectifying plate 62 of the second embodiment has an airfoil-shaped horizontal cross section at both end portions. When all the arm parts 5 form the same angle by the plurality of first hinge mechanisms and the plurality of second hinge mechanisms, the center line connecting the front edge 62a and the rear edge 62b in the horizontal cross section of both end portions of the rectifying plate 62 62c is preferably located on the circumference of a circle D centered on the rotation axis A.

When the cylindrical portion 61 of the second embodiment receives wind (airflow) from a predetermined direction while being rotated counterclockwise about the rotation axis G by a motor (not shown), a Magnus force is generated. The Magnus force generated in the cylindrical portion 61 acts in a direction to move the cylindrical portion 61 along the circle D in a counterclockwise direction. This causes the shaft 3 to rotate.

Note that a generator (not shown) may be installed in the mooring portion 10 to configure a vertical axis Magnus type wind power generator. The generator generates electricity by rotating the rotating body 13 that contacts the shaft 3. The generated electrical energy is sent to power transmission equipment or the like through a cable serving as the connecting portion 14.

Moreover, in the second embodiment shown in FIGS. 8 and 9, the second floating body 80 of the first embodiment shown in FIGS. 6 and 7 may be used. When all the arm parts 5 form the same angle by the plurality of first hinge mechanisms and the plurality of second hinge mechanisms, the protrusion part 81 and the body part 82 form a circle centered on the rotation axis A in the horizontal section. A shape having a center line 80c connecting the front edge 81a and the rear edge 81b on the circumference of the circle D or on the tangent line E of the circle D is preferable. Note that the body portion 82 may be directly connected to the current plate 62 without providing the protruding portion 81.

FIG. 10 shows a wind receiving section 60 of a floating vertical axis wind turbine 1 according to a third embodiment. FIG. 11 shows the wind blowing section 60 of the third embodiment of FIG. 8 viewed from above.

The wind receiving part 65 of the third embodiment may be a bucket type having a cup-shaped configuration in a cross section perpendicular to the rotation axis A. The bucket-shaped wind receiving part 65 has a cup-shaped bottom part 65a installed on the traveling direction side, and an extension part 65b extending from the end part of the bottom part 65a located far from the rotation axis A. The second coupling part 7 is coupled to the inside of the extension part 65b. Therefore, the structure is such that the wind hits the bottom portion 65a from the inside and a propulsive force is generated.

Note that a generator (not shown) may be installed in the mooring portion 10 to configure a vertical axis Magnus type wind power generator. The generator generates electricity by rotating the rotating body 13 that contacts the shaft 3. The generated electrical energy is sent to power transmission equipment or the like through a cable serving as the connecting portion 14.

As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the technical idea of the present invention.

Furthermore, in each of the above embodiments, the floating vertical axis wind turbine 1 has been described as rotating counterclockwise, but it may also rotate clockwise. When the wind receiving section 6 is airfoil-shaped, the directions of the leading edge 6a and the trailing edge 6b may be reversed, and when the wind receiving section 60 has a cylindrical section 61, the direction of rotation is clockwise and the cylindrical section is rotated clockwise. The rectifying plate 62 may be provided on the opposite side to the direction in which the rectifier 61 moves.

Further, in each of the above embodiments, three wind receiving parts 6 are arranged on the circumference of the circle D, but the number of wind receiving parts 6 may be changed as appropriate, and may be two or four. More than one wind receiving section 6 may be arranged. In that case, the angle at which they are arranged with respect to the center A of the circle D may be determined in accordance with the number of wind receiving portions 6. For example, if the number of wind receiving sections 6 is two, the angle may be 180 degrees, and if there are four, the angle may be 90 degrees.

As described above, the floating vertical axis wind turbine 1 of the present embodiment includes a first floating body 2 that is axially symmetrical with respect to the rotation axis A, a shaft 3 extending coaxially from the first floating body 2, and a shaft installed on the outer periphery of the shaft 3. a first coupling part 4; an arm part 5 having one end attached to the first coupling part 4 and extending from the shaft 3; wind receiving parts 6, 60, 65 attached to the other end of the arm part 5; It includes a second connecting part 7 that connects the wind receiving parts 6, 60, and 65, and a second floating body 8, 80 attached to the lower end of the wind receiving part 6. Therefore, even if the floating vertical axis wind turbine 1 of this embodiment is large, the rotation axis A can be stabilized and rotated smoothly.

Furthermore, in the floating vertical axis wind turbine 1 of the present embodiment, the maximum horizontal cross-sectional area of the second floating body 80 under the water surface is larger than the water line area. Therefore, the floating vertical axis wind turbine 1 can reduce the wave load and wave resistance received on the water surface W2, and can rotate smoothly.

Furthermore, in the floating vertical axis wind turbine 1 of the present embodiment, the arm portions 5 extend radially from at least above and below the shaft 3, and the first coupling portion 4 and the second coupling portion 7 are connected to the rotation of the shaft 3. It is configured to be rotatable about axes B and C that are orthogonal to the axis A and the longitudinal direction of the arm portion 5. Therefore, in the floating vertical axis wind turbine 1, the wind receiving part 6 moves up and down in accordance with the height of the water surface W2, reducing wave load and wave resistance during rotation, and allowing smooth rotation. can do.

In addition, in the floating vertical axis wind turbine 1 of the present embodiment, when the arm portions 5 form the same angle, the center line 80c connecting the leading edge 80a and the trailing edge 80b of the second floating body 80 is determined by the rotation of the shaft 3. It lies on the circumference around axis A. Therefore, since the propulsion direction is the same as the center line 80c of the second floating body 80, the floating vertical axis type wind turbine 1 can rotate more smoothly.

Further, in the floating vertical axis wind turbine 1 of the present embodiment, the wind receiving section 6 has an airfoil shape in a cross section perpendicular to the rotation axis A of the shaft 3. Therefore, the floating vertical axis type wind turbine 1 can allow air to flow with little resistance and can rotate smoothly.

Furthermore, in the floating vertical axis wind turbine 1 of the present embodiment, when the double arms 5 form the same angle, the center line 6c connecting the front edge 6a and the rear edge 6b of the wind receiving section 6 is the center line 6c of the shaft 3. It is located on the circumference around the rotation axis A. Therefore, the floating vertical axis wind turbine 1 can rotate more smoothly.

Furthermore, in the floating vertical axis wind turbine 1 of the present embodiment, the wind receiving section 60 includes a cylindrical section 61 that is rotatable on an axis parallel to the rotation axis A of the shaft 3, and a cylindrical section 61 that is rotatable at both ends of the axis of the cylindrical section 61. and a rectifying plate 62 that is supported by the cylindrical part 61 and installed in parallel with the cylindrical part 61 with a gap therebetween. It is attached to the lower end of the plate 62. Therefore, the floating vertical axis type wind turbine 1 can rotate smoothly due to the generation of Magnus force. Furthermore, in the case of strong winds, the wind can be released to avoid failure of the floating vertical axis type wind turbine 1.

In the floating vertical axis wind turbine 1 of the present embodiment, the wind receiving section 65 includes a cup-shaped bottom section 65a installed on the traveling direction side, and an end section of the bottom section 65a located far from the rotation axis A. The second coupling part 7 is coupled to the rotation axis A side of the extension part 65b. Therefore, the floating vertical shaft type wind turbine 1 can receive wind at the bottom portion 65a and rotate smoothly.

Furthermore, the floating vertical axis wind turbine system of the present embodiment includes a floating vertical axis wind turbine 1, a mooring section 10 that moores the shaft 3, and a generator 15 that generates electricity by using the rotation of the shaft 3 as rotational force. Be prepared. By using the floating vertical shaft type wind turbine 1 of this embodiment, which can stabilize the rotation axis A and rotate smoothly even if it is large, stable power generation can be achieved.

1... Floating vertical axis windmill 2... First floating body 3... Shaft 4... First coupling part 5... Arm parts 6, 60, 65... Wind receiving part 61... Cylindrical part 62... Current plate 7... Second coupling part 8 , 80...Second floating body 81...Protrusion part 82...Body part 10...Mooring part 11...Frame 12...Support part 13...Rotating body 14...Connection part 15...Generator

Claims (9)

a first floating body that is axially symmetrical about the rotation axis;
a shaft extending coaxially from the first floating body;
a first coupling part installed on the outer periphery of the shaft;
an arm portion having one end attached to the first coupling portion and extending from the shaft;
a wind blower attached to the other end of the arm;
a second connecting portion that connects the arm portion and the wind blowing portion;
a second floating body attached to the lower end of the wind receiving section;
Equipped with
A floating vertical axis wind turbine characterized by: The floating vertical axis wind turbine according to claim 1, wherein the maximum horizontal cross-sectional area of the second floating body below the water surface is larger than the water line area. A plurality of the arm portions extend radially from at least above and below the shaft,
The floating vertical shaft according to claim 1 or 2, wherein the first coupling part and the second coupling part are configured to be rotatable about an axis perpendicular to a rotation axis of the shaft and a longitudinal direction of the arm part. Type windmill. Any one of claims 1 to 3, wherein when the arm portions form the same angle, a center line connecting the front edge and the rear edge of the second floating body is on a circumference centered on the rotation axis of the shaft. Floating vertical axis wind turbine according to item 1. The floating vertical axis wind turbine according to any one of claims 1 to 4, wherein the wind receiving section has an airfoil shape in a cross section perpendicular to the rotation axis of the shaft. 6. The floating vertical structure according to claim 5, wherein when the arm portions form the same angle, a center line connecting the front edge and the rear edge of the wind blowing portion is on a circumference centered on the rotation axis of the shaft. Axial windmill. The wind receiving part is
a cylindrical portion rotatable in an axis parallel to the rotational axis of the shaft;
a current plate that rotatably supports both ends of the shaft of the cylindrical portion and is installed in parallel with the cylindrical portion with a gap therebetween;
has
the second coupling portion is coupled to the current plate;
The floating vertical axis wind turbine according to any one of claims 1 to 4, wherein the second floating body is attached to a lower end of the current plate. The wind receiving section is
A cup-shaped bottom installed on the side in the direction of travel,
an extension extending from an end of the bottom portion located far from the rotation axis;
has
The floating vertical axis wind turbine according to any one of claims 1 to 4, wherein the second coupling part is coupled to the rotating shaft side of the extension part. A floating vertical axis wind turbine according to any one of claims 1 to 8,
a mooring section mooring the shaft;
a generator that generates electricity using the rotation of the shaft as rotational force;
A floating vertical axis wind turbine power generation system.

Images