JP5567547B2 - Power generator and vertical axis power generator using the same - Google Patents

Description

  The present invention relates to a power generation device that rotates a vertical shaft by receiving a fluid pressure of a fluid and a vertical shaft power generation device using the power generation device.

  In recent years, abnormal weather and environmental destruction associated with global warming have progressed, and there is an increasing need for effective use of environmentally friendly renewable natural energy in order to reduce greenhouse gas emissions. For this reason, various wind power generators have been developed and put into practical use as part of the development of energy that does not use fossil fuels.

  Wind turbines for wind power generation include an orthogonal axis type wind turbine and a vertical axis type wind turbine depending on the direction of the rotation axis. Among these, many orthogonal axis type wind turbines having high power generation efficiency and easy to increase in size have already been developed and put into practical use. This is a device in which the rotation axis of the windmill is an orthogonal axis, and it is necessary to provide a heavy object such as a generator integrally with the windmill on the upper part of the support column, which causes difficulty in installation work and maintenance work. In addition, it is necessary to always arrange the rotating surfaces of the windmills so that they face each other.

On the other hand, in the vertical axis type windmill, the rotation axis of the windmill is perpendicular to the installation surface, and heavy objects such as generators can be installed on the ground, so installation work and maintenance work are easy. In Japan, where the wind direction is likely to change depending on the time of day, there is no dependence on the wind direction regardless of the direction of the wind. Therefore, although a vertical axis type wind turbine is suitable, a wind power generator using an orthogonal axis type wind turbine has been widely used at a rate of 95% or more.
The reason for this is that the vertical axis wind turbine has a structure that does not depend on the wind direction. Since a large torque is sometimes required, it is difficult to start in a low wind speed range of about 1 m / sec. In addition, even if the windmill is started, there is a large aerodynamic loss (about 60% of wind energy), and effective power generation efficiency cannot be obtained.

In order to reduce the influence of the aerodynamic loss of the vertical axis wind turbine, the wind turbine is mounted on the disk assembled on the upper end of the vertical axis in a state where the wind receiving plate is twisted 90 degrees symmetrically to the connecting rod. Has been proposed. As a result, when the wind receiving plate standing on the disk receives the tailwind, the disk rotates, and when it becomes the opposite wind, it falls horizontally and the opposite wind receiving plate stands up and receives the wind and rotates repeatedly (patent) Reference 1).
In addition, a movable blade portion that is assembled to a support member that is supported in a direction orthogonal to the vertical axis so as to be rotatable around the axis in a range larger than 0 degree and smaller than 90 degrees with respect to the virtual horizontal plane, and 0 with respect to the virtual horizontal plane A fixed blade portion fixed to the support member with a depression angle larger than 15 degrees and smaller than 15 degrees is provided. When moving toward the lee, the movable blade is opened by receiving fluid pressure to rotate the vertical axis, and when moving toward the wind, the movable blade is closed by receiving the drag of the fluid so as not to receive resistance. (See Patent Document 2).

JP 2009-275641 A JP 2011-94574 A

  In the configuration of the vertical axis wind turbine described above, the wind turbine is opened and closed at an opening angle of about 0 to 90 degrees with respect to the stationary blade portion on the disk or the movable blade portion with respect to the fixed blade portion. The area of the blade portion that receives the wind pressure when heading is limited, and there is a possibility that sufficient torque cannot be obtained. In addition, since the wind receiving plate assembled by twisting the connecting rod by 90 degrees rotates together with the connecting rod, it is difficult to rotate if the amount of air received by the wind receiving plate standing on the disk is small. When a windmill rotates and a fixed blade | wing part faces windward, it has a structure which is easy to receive resistance.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a power generator that can take a large area of a rotary blade that receives fluid pressure, has little hydrodynamic loss, rotates even at a small flow rate, and obtains sufficient rotational torque, and is reduced in size and weight using the power generator. An object of the present invention is to provide a vertical axis power generation device that is capable of generating power even at a small flow rate regardless of the flow direction of fluid, having good portability, ease of assembly and maintainability.

In order to solve the above problems, a power generation device according to the present invention has the following configuration.
That is, from a vertical axis pivotally supported so as to be rotatable in a vertical direction with respect to the installation surface, one or a plurality of orthogonal axes assembled perpendicular to the vertical axis, and a central bone arranged along the orthogonal axis A hinge in which a first blade portion and a second blade portion having a shape in which a sheet material is integrated with a skeleton portion in which a branch bone branches at a plurality of positions toward the outside are provided on the central bone side around the orthogonal axis Rotating blades which are provided on both sides so as to be swingable by the respective portions and rotate in one body with the vertical shaft, and the first blade portion and the second blade portion receive fluid at a rotational position toward the downstream side in the fluid flow direction. The rotating blades open up and down in a direction in which the opening angle around the orthogonal axis increases to a predetermined range, and when the fluid pressure is received at a rotational position toward the upstream side in the fluid flow direction, the opening angle is reduced to the predetermined range. around the orthogonal axis for restricting the opening angle of the A plurality of an angle regulating unit, by comprising the features.
According to the above configuration, the first blade portion and the second blade portion provided on both sides of the orthogonal axis orthogonal to the vertical axis receive the fluid pressure at the rotational position toward the downstream side in the fluid flow direction and open up and down. The opening angle of the rotation increases to a predetermined range, and when the fluid pressure is received at the rotational position toward the upstream side in the fluid flow direction, the angle is controlled so that the opening angle is decreased to the predetermined range and swings. Since a plurality of angle restricting portions are provided around the orthogonal axis, they are not easily damaged even in strong winds or gusts . Further, since the first blade portion and the second blade portion have a shape in which the sheet material is integrated with the branched skeleton portion, the first blade portion and the second blade portion are lightweight and can be opened and closed even with a slight fluid pressure. As a result, the rotating blades are not easily affected by the direction of the fluid and the fluid resistance, so there is little hydrological loss, and the rotating blades are efficiently rotated integrally with the vertical shaft under the slight fluid pressure to generate power. it can.

The first blade portion and the second blade portion have a blade shape in which a sheet material is integrated with a skeleton portion where branches are branched at a plurality of locations from the central bone arranged along the orthogonal axis toward the outside. And the first blade portion is provided on the central bone side with respect to the orthogonal axis, and the second blade portion is provided on the central bone side with respect to the orthogonal axis. It is desirable that each part is assembled so as to be swingable.
According to the above configuration, since the weight of the rotary blade is light, the opening angle of the first blade portion and the second blade portion around the orthogonal axis is increased by receiving a slight fluid pressure, and when receiving the fluid resistance, the orthogonal axis The opening angle of the rotation is reduced, and the rotating blade can be efficiently rotated integrally with the vertical shaft.

When the rotation angle below the vertical axis in the vertical direction is 0 degree and the rotation angle above the axial direction is 180 degrees, the angle restricting member causes the first blade portion to be larger than 90 degrees around the orthogonal axis and from 180 degrees. It is preferable that the second blade portion is swung in a small range, and the second blade portion is swung in a range larger than 0 degree and smaller than 90 degrees around the orthogonal axis.
As a result, the first blade portion and the second blade portion 2 receive the fluid pressure at the rotational position toward the downstream side in the fluid flow direction and open to an opening angle close to 180 degrees, so that the fluid pressure is sufficiently received over a wide area. Can generate a large rotational force (torque). In addition, since the first blade portion and the second blade portion 2 are subjected to fluid pressure at the rotational position toward the upstream side in the fluid flow direction and the opening angle is reduced to nearly 90 degrees, the effect of the fluid resistance is reduced. The rotational force generated in the blade can be maintained.

Further, the vertical axis power generator is characterized in that the vertical axis of any of the power generation devices described above is connected to the rotor of the generator.
Accordingly, it is possible to provide a power generation device that can be reduced in size and weight, has good portability, assembly property, and maintainability, and generates power even at a small flow rate regardless of the fluid flow direction.

  According to the present invention, the area of the rotary blade that receives the fluid pressure at the rotational position toward the downstream side in the fluid flow direction can be increased, and the fluid resistance at the rotational position toward the upstream side in the fluid flow direction is less likely to be affected. Regardless of this, it is possible to provide a power generator capable of rotating with a small flow rate to obtain a sufficient rotational torque, and a small-sized vertical axis power generator capable of generating power efficiently using this and having good maintainability.

It is a front view of a vertical axis power generator. It is a perspective view showing rotation operation of a power generator. It is a top view of a power generator. It is the front view and side view which show the state which the rotary blade | wing opened. It is explanatory drawing which shows the open / close state of a 1st blade | wing part and a 2nd blade | wing part. It is explanatory drawing which shows an example of the movable range of a 1st blade | wing part and a 2nd blade | wing part. It is the front view and side view which show the principal part form of the frame | skeleton part of the rotary blade which concerns on another example. It is a perspective view which shows the principal part form of the frame | skeleton part of the rotary blade which concerns on another example. It is a state explanatory drawing in the case of removing the accommodation state and rotary blade of a windmill. It is an axial sectional view of a vertical axis power generator according to another example.

  Hereinafter, embodiments of a power generation device and a vertical axis power generation device according to the present invention will be described in detail with reference to the drawings. Hereinafter, a wind turbine will be described as an example of a power generation device, and an independent power source type wind power generation device having an output of around 10 kW will be described as an example of a vertical axis power generation device. In addition, although the wind pressure is utilized for the fluid pressure, when using fluid pressures, such as a water pressure, a water turbine, a hydroelectric generator, etc. may be sufficient.

  As shown in FIG. 1, in the wind turbine generator, a vertical shaft 2 of a windmill 1 (power generator) is connected to a rotor (not shown) of a generator 3. Alternatively, the vertical shaft 2 may be connected to the rotor shaft of the generator 3 or a coupling to the rotor shaft.

  The configuration of the windmill 1 will be described. A vertical shaft 2 extending in a direction perpendicular to the installation surface from the generator 3 is rotatably supported. The vertical shaft 2 is assembled with rotating blades 4 that rotate in unison with the vertical shaft 2 under the pressure of wind blowing from any direction.

  Hereinafter, the configuration of the rotary blade 4 will be described. A plurality of orthogonal shafts 5 are integrally assembled perpendicular to the vertical shaft 2 (see FIG. 3). A vertical shaft 2 passes through a through-hole 5b provided in a connecting portion 5a provided in the central portion of each orthogonal shaft 5 and is fixed to the vertical shaft 2 with screws or the like in the radial direction. Yes. In the present embodiment, as shown in FIG. 1, orthogonal shafts 5 are assembled at five locations at equal intervals in the axial direction of the vertical shaft 2. As shown in FIG. 2, adjacent orthogonal axes 5 are assembled so as to be orthogonal to each other. The number of orthogonal axes 5 may be singular, or may be less than five or more than five. Further, it is desirable that the plurality of orthogonal shafts 5 are assembled with an equal angular arrangement around the vertical axis 2 in addition to the case where they are orthogonal.

  4A and 4B, a pair of first movable blade portion 6 and second movable blade portion 7 are provided on both sides of the orthogonal shaft 5 so as to be swingable around the orthogonal shaft 5. The first blade portion 6 and the second blade portion 7 are formed by superposing the sheet material 12 on the skeleton portion 8 in which the branch bones 8b branch from the central bone 8a arranged along the orthogonal axis 5 side toward the outside. It has an integrated blade shape. Although the first blade portion 6 and the second blade portion 7 are the same size, the first blade portion 6 is smaller in size than the second blade portion 7 in consideration of easiness of opening by receiving wind pressure. May be.

In the present embodiment, the first movable blade portion 6 and the second movable blade portion 7 are opened around the orthogonal axis 5 so that the branch bones 8b branch from the central bone (spine) 8a toward the outside. The fishbone-shaped skeleton portion 8 is formed. A first wing portion 6 and a second wing portion 7 are formed by bonding a water-repellent cloth sheet material 12 to the fishbone-shaped skeleton portion 8. The skeleton 8 is not limited to the fishbone shape, and various forms such as a feather shape or a leaf vein shape can be adopted. In addition, a resin material or a metal material is preferably used for the skeleton portion 8, and the sheet material 12 includes a sheet shape or a thin plate shape such as a resin material in addition to a cloth material.
Moreover, in the case of the small rotary blade 4, it is also possible to integrally mold the skeleton part 8 and the sheet material 12 by resin molding. Alternatively, it may be integrally formed by insert molding using a metal material as the skeleton part 8 (one or both of the central bone 8a and the branch bone 8b) or by two-color molding using a resin material different from the blade as the skeleton part 8. .

  Further, as shown in FIGS. 4 to 6, the shape of the skeleton part 8 is such that the branch bone 8b has a uniform thickness, but is not limited to this, for example, FIGS. 7A and 7B. As shown in FIG. 8, the branch bone 8b may have a narrow width (c <d) and a thin plate thickness (a <b) toward the distal side away from the central bone 8a, as shown in FIG. In this manner, the branch bone 8b may be tapered and the plate thickness may be reduced (a <b) as the distance from the central bone 8a increases. Thus, by making the distal end side of the branch bone 8b narrow or tapered, the flexibility is increased, the weight of the rotary blade 4 can be reduced, and the flexibility is increased and the bending of the sheet material 12 is utilized. This makes it easier to capture various winds such as light breeze, light breeze, cool breeze and strong breeze. 7 and 8, the wind receiving plate 9 provided on the orthogonal shaft 5 is omitted.

In addition, as shown in FIG. 2, the first blade portion 6 is assembled so as to be swingable by a first hinge portion 6 a provided on the central bone 8 a side with respect to the orthogonal shaft 5. The second blade portion 7 is assembled so as to be swingable by a second hinge portion 7 a provided on the central bone 8 a side with respect to the orthogonal axis 5. The first hinge part 6 a and the second hinge part 7 a are alternately arranged in the axial direction of the orthogonal axis 5.
According to the above configuration, the rotating blade 4 is light in weight and receives a slight wind pressure, so that the opening angle of the first blade portion 6 and the second blade portion 7 around the orthogonal axis 5 is increased to a predetermined range, thereby reducing the wind resistance. When received, the opening angle around the orthogonal axis is reduced to a predetermined range, and the rotary blade 4 can be efficiently rotated integrally with the vertical axis 2.

  As shown in FIGS. 5A and 5B, the orthogonal shaft 5 is provided with an angle restricting portion 10 that restricts the opening / closing angle of the rotary blade 4. Specifically, the opening angle is set when the first blade portion 6 and the second blade portion 7 are opened up and down in a direction in which the opening angle around the orthogonal axis 5 increases by receiving wind pressure at the rotational position toward the leeward side. An opening-side stopper 10a that restricts the opening angle to a predetermined range, and a closing-side stopper 10b that restricts the opening angle to a predetermined range when it is closed so as to decrease the opening angle when receiving wind pressure at a rotational position toward the windward are provided. Yes. In the present embodiment, the angle restricting portion 10 is provided with slits 10d in the circumferential direction of a cylindrical body 10c provided concentrically with the orthogonal shaft 5, and both ends in the rotational direction of the slit 10d are open side stoppers 10a and closed sides. It is a stopper 10b. The angle restricting portion 10 is not limited to the slit shape, and a stopper such as a protrusion may be provided around the orthogonal axis 5.

  Further, an assist spring 11 may be fitted into the orthogonal shaft 5. The assist spring 11 is a torsion coil spring, a shape memory spring, or the like. One end of the assist spring 11 is connected to the first blade portion 6, and the other end is connected to the second blade portion 7. As a result, the opening / closing operation of the first blade portion 6 and the second blade portion 7 is accelerated by assisting the opening / closing operation when the rotating blade 4 is opened / closed when receiving wind pressure and resistance, and fluid loss Can be reduced.

  FIG. 5A shows the opening side stopper 10a when the first blade portion 6 and the second blade portion 7 are opened in the direction in which the opening angle around the orthogonal axis 5 is increased by receiving wind pressure at the rotational position facing leeward. The contact state is shown. 5B shows the closed side when the first blade 6 and the second blade 7 that have received wind pressure at the rotational position toward the windward are closed so that the opening angle around the orthogonal axis 5 decreases. The state which contact | abutted to the stopper 10b is shown.

In FIG. 6, when the rotation angle below the vertical axis 2 is 0 degree and the rotation angle above the axial direction is 180 degrees, the angle restricting member 10 moves the first blade portion 6 around 90 degrees around the orthogonal axis 5. It is swung within a range of less than 180 degrees. In FIG. 6, the first blade portion 6 swings around the orthogonal axis 5 in the range of approximately 60 degrees from 105 degrees to 165 degrees. Further, the second blade portion 7 is swung around the orthogonal axis 5 in a range of approximately 60 degrees from 15 degrees to 75 degrees.
As a result, the first blade portion 6 and the second blade portion 7 receive wind pressure at the rotational position toward the leeward and open to an opening angle close to 180 degrees, so that sufficient rotational force (torque) is received by receiving wind pressure over a wide area. Can be generated. Moreover, since it closes to a position close to 90 degrees at the rotational position toward the windward, it is difficult to receive wind resistance and the rotating blade 4 can continue to rotate efficiently.
Therefore, since it is difficult to be influenced by the wind direction and wind resistance, the rotating blade 4 rotates by receiving a slight wind pressure, and the windmill can be driven to rotate.

  In addition, the rotation range of the 1st blade | wing part 6 and the 2nd blade | wing part 7 is not limited to the said range, and the rocking | fluctuation range does not necessarily need to be the same. Specifically, by changing the range of the slit 10d of the angle restricting portion 10, it can be changed to an arbitrary swinging range. For example, the second blade portion 7 may be suspended by its own weight and swung to about 90 degrees by receiving wind resistance from the 0 degree position. When the second blade portion 7 swings to the 90 degree position, it is difficult for the blade to open at a position facing the leeward side, so it is desirable to swing within a smaller range. Further, the first blade portion 6 may swing within a range from an elevation angle (for example, 95 degrees) greater than 90 degrees to around 180 degrees (for example, 175 degrees). When the first blade portion 6 is also swung to the 90 degree position, it is difficult for the blade to open at the position facing the leeward side, so it is desirable that the first blade portion 6 be swung within a larger range. Further, the assist spring 11 connected to the first blade portion 6 and the second blade portion 7 may be omitted.

As shown in FIG. 1, orthogonal shafts 5 are rotatably assembled to the vertical shaft 2 so as to intersect with each other at five points in the axial direction. Therefore, even if the rotating blades 4 are opened and closed, there is no interference even if the rotating blades 4 provided on the orthogonal shaft 5 adjacent in the vertical axis direction are opened and closed. Therefore, the orthogonal shaft 5 is assembled to the vertical shaft 2 so that the second blade portion 7 and the first blade portion 6 provided on the orthogonal shaft 5 adjacent in the vertical axis direction overlap each other.
As a result, a large number of rotating blades 4 can be assembled in the axial direction of the vertical shaft 2 without interfering with each other, and the rotational efficiency and rotational force can be increased regardless of the direction of wind flow while suppressing the vertical height. Can do.

  In the vertical axis wind power generator, since the sheet-like rotary blades 4 are assembled so as to overlap each other on the orthogonal shaft 5 fixed to the vertical shaft 2 of the windmill 1, the axial length of the rotary blades 4 is 20 m or more. A large-scale windmill 1 can be reduced in size and weight, and it is easy to carry, assemble, and maintain, and provides a vertical axis wind power generator with good power generation efficiency that generates power even with a small flow rate regardless of the wind direction. can do.

  Further, as shown in FIG. 9 (A), when the vertical axis wind power generator is not used, the fixing (screwing or the like) between each orthogonal shaft 5 and the vertical shaft 2 is released, and each orthogonal shaft 5 is connected. If the portions 5a are stacked on the main body of the generator 3 so that the portions 5a are stacked, it is convenient for storage without taking a place. In this case, the first movable blade 6 and the second movable blade 7 provided on both sides of the orthogonal shaft 5 are overlapped with each other along the vertical axis 2 by reducing the opening angle around the orthogonal shaft 5. In addition, the rotary blade 4 can be folded in a compact manner.

  Further, as shown in FIG. 9B, when moving the vertical axis wind power generator, the fixing (screwing etc.) between each orthogonal axis 5 and the vertical axis 2 is released and the tip of the vertical axis 2 is released. Further, by pulling out the through hole 5b and removing each of the connecting portions 5a of the orthogonal shaft 5, the rotating blade 4 can be detached from the vertical shaft 2 and transported separately from the generator 3, and the portability is improved again. There is no need to assemble a vertical axis wind power generator.

FIG. 10 is a sectional view in the axial direction of a vertical axis power generator according to another example. The vertical axis power generator described above has a structure that is relatively suitable for downsizing, but the height of the vertical axis 2 exceeds 30 m and the diameter of the rotating blade 4 (the length of the orthogonal axis 5) exceeds 20 m. In the case of a large vertical shaft power generator, the vibration of the vertical shaft 2 itself due to the fluid pressure is increased, the installation strength is reduced, and the loss due to uneven rotation may be increased. For this reason, the structure of the vertical shaft 2 may be a double structure in which the fixed shaft (support) 2a and the cylindrical rotating shaft 2b are concentrically disposed around the fixed shaft 2a. A base portion (foundation) 13 provided with an insertion hole 13a for inserting the fixed shaft 2a is embedded in the installation surface. On the base portion 13, the rotor shaft hole 3a of the generator 3 is installed in alignment with the insertion hole 13a. Then, the fixed shaft 2 a is inserted and fixed in the insertion hole 13 a through the rotor shaft hole 3 a of the generator 3. Moreover, the rotating shaft 2b concentrically arranged with the fixed shaft 2a is rotatably connected to a rotor (not shown) of the generator 3. The rotating shaft 2b is rotatably supported on the generator 3 by a bearing 3b. The rotary blades 4 are assembled by being fixed with screws or the like in the radial direction through the respective orthogonal shafts 5 through the rotary shafts 2b as in the above-described embodiment. Alternatively, the orthogonal shaft 5 may be fitted and assembled to the shaft portion protruding from the outer periphery of the rotating shaft 2b. In FIG. 10, orthogonal shafts 5 are assembled at three locations at equal intervals in the axial direction of the rotating shaft 2b. The orthogonal shafts 5 are divided and may be fitted together and assembled according to the size of the rotary blades 4.
According to the above configuration, a large vertical shaft power generator using large rotating blades 4 can maintain installation strength by suppressing shaft shake and vibration due to fluid pressure, and can reduce loss by suppressing rotation unevenness. Can do.

  As described above, even if the flow of fluid changes in any direction of 360 degrees around the vertical axis 2 such as wind flow, water flow, and tidal current that changes every moment (turbulent flow etc.), the rotating blade 4 Since it is difficult to be affected by the direction of the fluid and the fluid resistance, there is little hydrodynamic loss, and the rotating blade 4 can be efficiently rotated integrally with the vertical shaft 2 by receiving a slight fluid pressure to generate power. .

The power generation device described above is exemplified by the wind turbine 1 and the vertical axis power generation device is exemplified by the wind power generation device. However, if the fluid is something other than wind, for example, a fluid such as water, the turbine, the hydroelectric power generation device. Alternatively, it can be applied to a tidal current power generation device using the flow of seawater.
Furthermore, it is possible to combine a power generation device using these various fluid pressures (wind pressure, water pressure, tidal current, etc.), or a combined power generation device appropriately combining these and other renewable natural energy such as solar power generation. It may be used.

1 windmill
2 Vertical axis 2a Fixed axis (support)
2b Rotating shaft
3 Generator
3a Rotor shaft hole 3b Bearing 4 Rotor blade
5 orthogonal shaft 5a connecting part 5b through hole
6 First blade
6a 1st hinge part
6b, 7b Outer peripheral side end
7 Second blade
7a Second hinge part
8 Skeleton
8a central bone
8b branch bone
9 Wind receiving plate
10 Angle control part
10a Opening side stopper
10b Close side stopper
10c cylinder
10d slit
11 Assist spring 12 Sheet material
13 Base (basic)
13a Insertion hole

Claims (3)

  A vertical axis that is pivotally supported so as to be rotatable in a vertical direction with respect to the installation surface, one or a plurality of orthogonal axes assembled perpendicularly to the vertical axis, and an outer side from a central bone arranged along the orthogonal axis A first blade portion and a second blade portion having a shape in which a sheet material is integrated with a skeleton portion in which branch bones are branched at a plurality of locations, by hinge portions provided on the central bone side around the orthogonal axis. The rotating blades which are provided on both sides so as to be swingable and rotate in one body, and the first blade portion and the second blade portion receive fluid at a rotational position toward the downstream side in the fluid flow direction and receive the fluid. Opening and closing of the rotating blades so that the opening angle around the orthogonal axis opens up and down in a direction increasing to a predetermined range, and when the fluid pressure is received at the rotational position toward the upstream in the fluid flow direction, the opening angle is reduced to the predetermined range. Multiple around the orthogonal axis that regulates the angle Power generating device, wherein the vignetting angle regulating unit, by comprising a.   When the rotation angle below the axial direction of the vertical axis is 0 degree and the rotation angle above the axial direction is 180 degrees, the angle restricting portion makes the first blade portion more than 90 degrees around the orthogonal axis and more than 180 degrees. 2. The power generation device according to claim 1, wherein the second blade portion is swung in a range greater than 0 degree and less than 90 degrees around the orthogonal axis.   The vertical axis | shaft generator of the power generator of Claim 1 or Claim 2 is connected to the rotor of a generator.

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