JP2015072009A - Blade structure and power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve torque by increasing resistance generated on blades.SOLUTION: A blade structure 2 has a plurality of blades 22 receiving flow force as force of a fluid, a supporting member supporting the blades 22 and being rotatable on a rotating shaft extended in a direction vertical to the flow force, and a blade rotating mechanism for freely rotating the blades 22 around the rotating shaft by a prescribed rotating angle TZ. As the blades can be inclined in the direction of flow force by utilizing the flow force, and symmetry of the blades can be disturbed, the resistance generated on the blades can be increased.

Description

  The present invention relates to a blade structure that can be rotated by, for example, hydraulic power, wind power, and the like, and a power generation device that uses the blade structure.

  2. Description of the Related Art Conventionally, as a wind turbine for wind power generation, a vertical axis wind turbine having a rotating shaft extending in a vertical direction and a horizontal axis wind turbine having a rotating shaft extending in a horizontal direction are known. Further, the vertical axis windmill includes a drag type in which the drag generated on the blades is the rotational force of the windmill (see, for example, Patent Document 1), and the lift type in which the lift generated on the blades is the rotational force of the windmill. Drag type wind turbines such as Saponius type wind turbines and rotating blade type wind turbines have a simple structure and are easy to check and repair because the mechanical parts such as the power generation unit are in a low position. Has characteristics.

  However, in such a drag type wind turbine, a rotational force is generated by a drag generated on the blade on one side of the wind turbine rotating shaft with respect to the wind direction, but on the other side of the rotating shaft on the blade, The generated drag does not become a rotational force, and a force that reduces the rotational force of the windmill will work, and the power generation system including such a drag-type windmill has poor energy conversion efficiency of wind energy.

  Therefore, in the wind turbine disclosed in Patent Document 1, a speed increasing portion that increases the speed of wind traveling toward the blades is provided to improve the energy conversion efficiency of wind energy. This is to increase the drag generated on the blades by the speed increasing portion and to obtain a larger rotational force than usual.

Japanese Patent Laid-Open No. 2001-211569

  In recent years, there has been a need to further utilize natural energy, and there has been a demand to increase the rotational force further than the above-described drag-type windmill and water turbine.

  This invention is made | formed in view of this point, The place made into the objective provides the blade structure and electric power generation system which can increase a rotational force.

  In order to solve such a problem, the blade structure of the present invention supports a plurality of blades that receive a fluid force that is a fluid force, supports the blades, and can rotate around a rotation axis that extends in a direction perpendicular to the fluid force. And a blade rotating mechanism for freely rotating the blade by a predetermined rotation angle around the rotation axis.

  Accordingly, the blade structure can change the position of the blade so that the drag force of the blade is increased by the flow force, and can improve the rotational force.

  Further, the power generation system of the present invention has a rotating shaft that extends in a direction perpendicular to the fluid force that is the force of the fluid, a plurality of blades that receive the fluid force, and supports the blades and extends in a direction perpendicular to the fluid force. A blade structure having a support member that can rotate around the rotation axis, a blade rotation mechanism that freely rotates the blade by a predetermined rotation angle around the rotation axis, and rotation of the blade structure that is transmitted through the rotation shaft And a power generator that converts power into electric power.

  As a result, in the power generation system, the rotational force can be improved by changing the position of the blades so that the drag force of the blades is increased by the flow force.

  INDUSTRIAL APPLICABILITY The present invention can realize a blade structure and a power generation system that can improve the rotational force by changing the position of the blade so that the drag force of the blade is increased by the flow force.

It is a basic diagram which shows the structure of the electric power generation system in 1st Embodiment. It is a basic diagram which shows the structure (1) of the blade | wing structure in 1st Embodiment. It is a basic diagram which shows the structure (2) of the blade | wing structure in 1st Embodiment. It is a basic diagram which shows the structure (3) of the blade | wing structure in 1st Embodiment. It is a basic diagram with which it uses for description of rotation of the conventional blade | wing structure. It is a basic diagram with which it uses for description of rotation of the blade | wing structure in 1st Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 2nd Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing structure in 2nd Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 3rd Embodiment. It is a basic diagram which shows the structure (1) of the blade | wing in 3rd Embodiment. It is a basic diagram which shows the structure (2) of the blade | wing in 3rd Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 4th Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing in 4th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 5th Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing in 5th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 6th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 7th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 8th Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing in 8th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 9th Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing in 9th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 10th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 11th Embodiment. It is a basic diagram with which it uses for description of rotation of the blade | wing in 11th Embodiment. It is a basic diagram with which it uses for description of arrangement | positioning (1) of the blade | wing in 11th Embodiment. It is a basic diagram with which it uses for description of arrangement | positioning (2) of the blade | wing in 11th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 12th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 13th Embodiment. It is a basic diagram which shows the structure of the blade | wing in 13th Embodiment. It is a basic diagram which shows the structure of the blade | wing structure in 14th Embodiment.

  Next, modes for carrying out the present invention will be described with reference to the drawings.

<First Embodiment>
[1-1. Configuration of power generation system]
FIG. 1 shows a power generation system 1 as a whole. For example, power generation is performed with a flow force that is a fluid flow force, such as hydropower using wind power or river power or wind power.

  The blade structure 2 is connected to the power generation device 4 in a state in which the blade structure 2 can be rotated in the horizontal direction by passing the central rotation shaft 3 in the vertical direction through a center hole 21 provided in the central portion. The power generation device 4 includes an energy conversion mechanism that converts the rotational force transmitted from the blade structure 2 via the central rotation shaft 3 into electric power.

  The blade structure 2 has a so-called vertical type propeller structure that rotates by receiving a force in a substantially vertical direction with respect to the flow of the fluid, and the fluid flows in the horizontal direction in the figure, Rotate. Within this lateral direction, the vane structure 2 can rotate irrespective of the fluid flow direction. The power generation device 4 may have a function according to the characteristics of the fluid, such as a waterproof function.

[1-2. Configuration of blade structure]
FIG. 2 is a view of the blade structure 2 in FIG. 1 as viewed from above in the vertical direction. The blade structure 2 has a cylindrical center support 25 as a center, and a center hole 21 is provided in the center thereof. Eight blade rotating shafts 23 are provided concentrically on the outer side of the central support 25, and eight blades 22 (22a to 22g) are rotatable in a state of being outwardly rotated from each blade rotating shaft 23. Is provided.

  The blade 22 is curved so as to receive more fluid force in one direction. There is no restriction | limiting in particular about this curvature degree.

  As shown in FIG. 3, disk-shaped upper and lower surfaces 26 and 27 are provided in the vertical and vertical directions of the center support 25. The blade structure 2 is provided with eight rod-shaped angle adjusting portions 24 on concentric circles along the outer edges of the upper and lower surfaces 26 and 27.

  FIG. 4 shows a layout view of the blade rotation shaft 23 and the angle adjustment unit 24. The blade rotation shafts 23 are arranged on the outside of the center support 25 at substantially equal intervals. The angle adjusters 24 are arranged at substantially equal intervals along the inner edges of the upper and lower surfaces 26 and 27 so as to be alternated with the blade rotation shaft 23.

  That is, the blade rotation shaft 23 and the angle adjustment unit 24 are arranged every 45 degrees. Further, the angle adjusting unit 24 is disposed at a position shifted by approximately 22.5 degrees in the rotation direction with respect to the blade rotation shaft 23.

  As a result, as shown in FIG. 2, for example, the blade 22 d can freely rotate in a region surrounded by the two angle adjustment units 24. That is, the angle adjustment unit 24 limits the rotation angle of the blade 22d to a predetermined rotation angle. Note that the angle adjusting unit 24 preferably uses an elastic material for at least a part of a portion in contact with the blades 22 in order to reduce an impact when the blades 22 collide with the blades 22 by a fluid force.

  Here, the conventional blade | wing structure P2 is demonstrated using FIG. Hereinafter, the conventional blade structure P2 will be described by adding P to the head of the same reference numerals as in FIGS. In the blade structure P2, the angle of the blade P22 is fixed without rotating.

  The direction in which the fluid flows (for example, windward) is the X direction, and the direction in which the fluid flows (for example, leeward) is the Y direction. At this time, the blades P22a to P22d located on the left side in the drawing can receive a flow force in the rotation direction.

  On the other hand, the blades P22e to P22h located on the right side in the drawing receive a fluid force in a direction opposite to the rotation direction (hereinafter referred to as a counter-rotation direction). If the blades P22a to P22g are flat plates (not shown), the flow forces received by the left blades P22a to P22d and the right blades P22e to P22h are balanced and do not rotate.

  However, since the blades P22a to P22g are curved so as to be easily subjected to a flow force in one direction, the flow force received in the rotation direction exceeds the flow force received in the anti-rotation direction by the amount of the curve, and as a result, The conventional blade structure P2 will rotate.

  Next, the flow force received by each blade P22 will be examined. According to the physical law, the blade P22 located at the angle most perpendicular to the rotation direction, that is, the blade P22c (FIG. 6) can efficiently convert the flow force into the rotation force.

  However, due to the positional relationship, the blade P22b positioned in the X direction receives a large amount of fluid force. Since the blade P22b is inclined with respect to the flow force, the rotational force is reduced accordingly, and the efficiency is poor.

  As described above, the blade structure 2 in the present embodiment can freely rotate by the rotation angle TZ in the adjustment region surrounded by the two angle adjustment units 24. That is, the blades 22a to 22h try to be located in the Y direction as much as possible due to the influence of the fluid force.

  As a result, the blade 22a located in the most X direction and the blade 22b located second are opened, and most of the fluid force is concentrated on the blade 22b located at an angle perpendicular to the fluid force, The spring 22b can convert the flow force into the rotational force very efficiently.

  On the other hand, in the blades 22e to 22h located on the right side, the flow force concentrates on the blade 22h that is not the most vertical like the conventional blade structure P2, and thus the rotational force in the counter-rotating direction becomes small. For this reason, in the blade structure 2 of the present invention, the rotational force in the rotational direction can greatly exceed the rotational force in the counter-rotating direction, and the rotational force can be remarkably improved as compared with the conventional structure.

  As described above, the blade structure 2 according to the present embodiment is provided with the blade 22 so as to freely rotate in the adjustment region, thereby eliminating the left-right symmetry and receiving the flow force most efficiently. It is possible to improve the energy conversion efficiency when the fluid force is concentrated on 22b and the fluid force is converted into rotational force.

  According to the above configuration, the blade structure 2 of the present invention indirectly supports the blade 22 via the blade rotation shaft 23 and the plurality of blades 22 that receive the fluid force of fluid such as air and water, The upper and lower surfaces 26 and 27 are rotatable about a central rotational axis 3 as a rotational axis extending in a direction perpendicular to the flow force, and the blades 22 are free to rotate around the central rotational axis 3 by a predetermined rotational angle TZ. I was able to rotate.

  Accordingly, the blade structure 2 can change the positional relationship between the blades 22a to 22h without artificial power by always positioning the blade 22 in the Y direction in which the flow of fluid flows by the flow force. The conversion efficiency of force into rotational force can be improved.

  The blade structure 2 is attached to the upper and lower surfaces 26 and 27 and includes a blade rotation shaft 23 that rotates the blade 22 around the central rotation shaft 3 and an angle adjustment unit 24 that adjusts the rotation angle TZ of the blade 22. It has a blade rotation mechanism. Thereby, the blade structure 2 can adjust the rotation angle TZ of the blade 22 with a simple configuration.

  The angle adjusting unit 24 is a bar that suppresses the rotation operation of the blade 22, and an elastic material is used at least at a part of the portion that contacts the blade 22. Thereby, the impact added to the blade | wing 22 is reduced and the durability of the blade | wing 22 is improved. Further, it is not necessary to increase the weight of the blades 22.

  The power generation system 1 of the present invention includes a central rotating shaft 3, a blade structure 2, and a power generation device 4 that converts the rotational force of the blade structure 2 transmitted through the central rotating shaft 3 into electric power. The energy conversion efficiency in the power generation system such as wind power or hydraulic power can be remarkably improved by improving the rotational force.

<Second Embodiment>
[2-1. Configuration of blade structure]
In the second embodiment shown in FIGS. 7 to 8, the blade structure 102 is different from the first embodiment in the arrangement of the blade rotation shaft 123 and the angle adjusting unit 124 and the configuration of the center support 125. Yes. In the second embodiment, 100 is shown in the same configuration as in the first embodiment. The configuration of the power generation system 1 is the same as that of the first embodiment, except that the configuration of the blade structure 102 is different.

  7 and 8 show the configuration of the blade structure 102 according to the second embodiment. In the blade structure 102, the diameter of the center support 125 is smaller than that of the center support 25 of the first embodiment, and an adjustment ring 130 for adjusting the direction of fluid force is provided outside the center support 125. Is provided.

  The blade rotation shafts 123 are evenly arranged on the concentric circles, but the concentric circles are larger in diameter than the first embodiment and are arranged at positions close to the angle adjusting unit 124. In addition, the ratio of the distance from the center of the blade structure 102 to the blade rotation shaft 123 and the distance from the center of the blade structure 102 to the angle adjustment unit 124 is about 1: 2. As a result, in the present embodiment, the rotation angle TZ is about 90 degrees, which is larger than that in the first embodiment.

  Further, the angle adjusting unit 124 (FIG. 7) is disposed at a position shifted from the blade rotation shaft 123 by about 15 degrees in the rotation direction. That is, the blade 122 has a small degree of inclination toward the rotation direction and a degree of inclination toward the counter-rotation direction in the rotation angle TZ. As a result, when the blade 122 falls in the rotation direction side, the blade 122 stands, and when the blade 122 falls in the counter rotation direction side, the blade 122 lies down. Here, “standing” refers to a state where the inclination is smaller (that is, close to 0 degree) with respect to the straight line passing through the center of the blade structure 102 and the blade rotation shaft 123 that is the rotation center of the blade 122. “Sleeping” refers to a state in which the person is more inclined with respect to the straight line. The greater the difference in the degree of inclination, the greater the effect. The difference is preferably 5 degrees or more, more preferably 15 degrees or more.

  For this reason, as shown in FIG. 8, the blade 122 protrudes from the upper and lower surfaces 126 and 127 on the left side in the drawing in which the fluid force is received in the forward direction in the rotational direction, whereas the fluid force is greatly received. On the right side in the figure, the blade 122 hardly protrudes from the upper and lower surfaces 126 and 127, and is less influenced by the flow force.

  That is, in the blade structure 102 in the second embodiment, as in the first embodiment, the blade 122 is rotatably attached by the rotation angle TZ, so that the blade 122 is displaced by the flow force, The portion of the blade 122 that receives the fluid force in the rotational direction opens greatly in the direction in which the fluid force comes, so that the energy of the fluid force can be efficiently converted into the rotational force.

  Further, in the blade structure 102, the blade rotation shaft 123 and the angle adjusting unit 124 are set so that the degree of inclination of the blade 122 in the rotation direction side is small and the degree of inclination in the counter-rotation direction side of the rotation angle TZ is large. The position of is adjusted.

  As a result, the blade structure 102 is configured such that the blade 122 stands when receiving the flow force in the forward direction in the rotation direction and lays the blade 122 when receiving the flow force in the reverse direction in the rotation direction. The angle can be changed. As a result, the difference between the fluid forces received in the forward direction and the reverse direction can be increased, and the energy of the fluid force can be efficiently converted into a rotational force.

  Further, the blade structure 102 has a large diameter of a concentric circle on which the blade rotation shaft 123 is arranged, and the distance from the center of the blade structure 102 to the blade rotation shaft 123 and from the center of the blade structure 102 to the angle adjustment unit 124. The ratio to the distance is set to about 1: 2. Thereby, the rotation angle TZ can be set large, and the difference in the degree of inclination of the blade 122 toward the rotation direction side and the counter-rotation direction side can be increased.

<Other embodiments>
In the first embodiment described above, the blade 22 is described as having a shape in which a rectangular flat plate is curved in one direction. The present invention is not limited to this, and may have, for example, a free curve shape, and the most suitable shape depending on various factors such as the type of fluid force, the number and size of the blades 22 and the size of the fluid force. Can be selected as appropriate.

  Moreover, in 1st Embodiment mentioned above, although the blade | wing structure 2 described the case where it was made to have eight blade | wings 22, this invention is not limited to this, The kind of fluid force and the magnitude | size of the blade | wings 22 are described. It can be appropriately selected depending on various factors such as the position of the sheath and the size of the flow force. In order to obtain the best effect of the present invention that efficiently receives the flow force, the rotation angle TZ is preferably set to 30 to 120 degrees, and preferably 6 to 12 blades 22 are provided. More preferably, it is 8-10.

  On the other hand, in the second embodiment, the rotation angle TZ is preferably set to 60 to 120 degrees, and preferably 6 to 12 blades 22 are provided. More preferably, it is 8-10. Depending on the positional relationship with the blade rotation shaft 23, the rotation angle between the blades 22 can be set in the vicinity of 90 degrees. Thus, the rotation angle TZ is preferably selected as an optimum angle according to the shape of the blade and the positional relationship between the blade rotation shaft 23 and the angle adjusting unit 24.

  Further, in the above-described second embodiment, the case where the angle adjusting unit 24 is arranged at a position shifted by 15 degrees from the blade rotation shaft 23 has been described. The present invention is not limited to this. The angle of the blade 122 is such that the blade 122 stands when receiving the fluid force in the forward direction in the rotational direction and lays the blade 122 when receiving the fluid force in the reverse direction. Can be changed. For example, in the case of the second embodiment, the same effect can be obtained if the angle adjusting unit 24 is displaced from the blade rotation shaft 23 by 0 degrees to less than 22.5 degrees. In other words, when the position on the same line passing through the center as the blade rotation shaft 23 is set as the reference position, the angle adjusting unit 24 is disposed at a position from the reference position to less than half of the angle between the blade rotation shafts 23. Thus, the same effect can be obtained.

  Furthermore, in the above-described second embodiment, the case where the adjusting ring 130 for adjusting the flow of the fluid force is provided has been described. The present invention is not limited to this, and the adjustment ring 130 is not necessarily required. Moreover, there is no restriction | limiting in the shape of the adjustment ring 130, For example, polygonal shape may be sufficient.

  Furthermore, in the above-described first embodiment, the case where the blade rotation shaft 23 and the angle adjusting unit 24 are arranged on a concentric circle has been described. The present invention is not limited to this, and is not necessarily arranged on a concentric circle. For example, it may be arranged alternately (zigzag) every other, and is preferably arranged according to various factors such as the configuration of the blade structure 2 and the type and size of the fluid.

  Furthermore, in the above-described first embodiment, the case where the upper and lower surfaces 26 and 27 support the blade 22 via the blade rotation shaft 23 has been described. The present invention is not limited to this. For example, only one of the upper and lower surfaces 26 and 27 may support the blade 22. Even without the upper and lower surfaces 26 and 27, for example, the rod extended from the center support 25 having the center hole 21 supports the blade 22 via the blade rotation shaft 23, and the angle is adjusted to the rod shape. A portion 24 may be provided. Further, the vane 22 is rotatably attached to the center support 25 so that the center support 25 can directly support the vane 22.

  Furthermore, in the above-described first embodiment, the angle adjusting unit 24 has been described as having a cylindrical rod shape. The present invention is not limited to this, and the point is that the rotation angle of the blade 22 may be limited. For example, the protrusion may protrude from the upper and lower surfaces 27, and the shape and arrangement thereof are not limited.

  Furthermore, in the first embodiment described above, the blade rotation shaft 23 is arranged around the center support 25 having a diameter much larger than the center hole 21, that is, on a concentric circle having a diameter much larger than the center hole 21. The case where it was made to describe was described. The present invention is not limited to this, and the center support 25 may be made smaller, and the blade rotation shaft 23 may be disposed on a concentric circle having a diameter slightly larger than the center hole 21. The rotation angle TZ varies depending on the position where the blade rotation shaft 23 is disposed and the positional relationship where the angle adjustment unit 24 is disposed. Therefore, the blade rotation shaft 23 and the blade rotation shaft 23 and the most suitable position according to the shape of the fluid and the blade 22 are used. It is preferable that the angle adjusting unit 24 is disposed. The distance from the center of the center hole 21 to the blade rotation shaft 23 and the distance from the center of the center hole 21 to the tip of the blade 22 are preferably between 1:20 and 1: 2. Is 1: 8 to 1: 2.

  Further, in the embodiment described above, the blade structure of the present invention is constituted by the blade 22 as the blade, the upper and lower surfaces 26 and 27 as the support members, the blade rotation shaft 23 and the angle adjusting unit 24 as the blade rotation mechanism. The case where the blade structure 2 is constructed is described. The present invention is not limited to this, and the blade structure of the present invention may be configured by blades having various configurations, a support member, and a blade rotation mechanism.

  Further, in the above-described embodiment, the case where the central rotation shaft 3 as the rotation shaft, the blade structure 2 as the blade structure, and the power generation device 4 as the power generation device are described. The present invention is not limited to this, and the power generation system of the present invention may be configured by the central rotating shaft 3, the blade structure 2, and the power generation device having various other configurations.

<Third Embodiment>
In the third embodiment shown in FIGS. 9 to 11, the blade structure 102 </ b> X is different from the second embodiment in that the blade 190 has a configuration and an air tank 150. In the third embodiment, the same reference numerals are given to the same components as those in the second embodiment, and the description thereof is omitted. The configuration of the power generation system 1 is the same as that of the first embodiment, except that the configuration of the blade structure 102 is different. The same applies to the following embodiments.

  As shown in FIG. 9, the blade structure 102 </ b> X has eight blades 190. As shown in FIGS. 10 and 11, the blade 190 is connected to the blade rotation shaft 123 in a rotatable state by passing the blade rotation shaft 123 through a rotation hole 199 formed in the vicinity of the end portion on the root side. ing.

  The blade 190 receives a fluid force in the rotation direction at the fluid force receiving surface 194 and receives a fluid force in the counter rotation direction at the reaction force receiving surface 193. The blade 190 has a tip 191 formed in a thin plate shape, whereas the body portion 192 is formed thicker toward the rotation center. In the blade 190, compared with the case where the thickness of the body part 192 is uniform (indicated by the center line CT), the angle formed by the reaction force receiving surface 193 and the tip 191 is made gentle to release the fluid force in the counter rotation direction. be able to. On the other hand, the blade 190 makes it possible to make the angle formed between the fluid force receiving surface 194 and the tip 191 steep so as to firmly receive the fluid force in the rotational direction.

  Further, the reaction force receiving surface 193 suppresses the resistance of the fluid force, while the fluid force receiving surface 194 is subjected to surface processing so as to increase the resistance of the fluid force.

  For example, when the hydropower is hydropower, processing to reduce the resistance of the hydrodynamic force can be achieved by adding irregularities that imitate the skin of marine animals such as fish, dolphins, and sharks, or by applying water repellent or hydrophilic treatment with paint. It is possible to suppress the force. In addition, when the flow force is wind power, it is possible to add irregularities that imitate the feathers of flying animals such as birds and insects, or to suppress the flow force with a special paint.

  As the processing for increasing the resistance of the fluid force, it is possible to increase the fluid force by making the surface as smooth as possible, adding irregularities that cause turbulent flow, or applying a special paint.

  Thereby, in the blade 190, the flow force in the counter-rotation direction can be released as much as possible while receiving a large flow force in the rotation direction, and the rotation force of the blade structure 102X can be further increased.

  In addition, the process mentioned above may be performed in either the reaction force receiving surface 193 or the fluid force receiving surface 194. In short, if the surface states of the reaction force receiving surface 193 and the fluid force receiving surface 194 are processed so that the fluid resistance at the reaction force receiving surface 193 is smaller than the fluid resistance at the fluid force receiving surface 194, the rotational force is increased by that amount. Can be improved.

  In addition, the blade structure 102 </ b> X has an air tank 150 outside the central rotation shaft 103. By containing a predetermined amount of gas such as air, the air tank 150 can cause almost no buoyancy in the water as the entire blade structure 102X. Specifically, the amount of gas contained is determined from the volume and weight of the blade structure 102X, and is sealed so that the gas does not leak to the outside.

  As a result, the position of the blade structure 102 in the water is stabilized, and it is possible to prevent the blade structure 102 from floating and being exposed to the air or sinking into contact with the bottom of the water, and eliminating unnecessary force. Therefore, the posture in water can be stabilized.

  Thus, in the third embodiment, by making the blade 190 thick and thin on the tip side, it is possible to efficiently receive the fluid force and improve the rotational force. Further, by adjusting the buoyancy by the air tank 150, the position of the blade structure 102 in water can be stabilized. Further, by providing a difference in the surface condition of the reaction force receiving surface 193 and the fluid force receiving surface 194 in the blade 190 so that the resistance of the fluid in the fluid force receiving surface 194 is larger than that of the reaction force receiving surface 193, the blade 190. The difference in the flow force received from the fluid between the rotation direction and the counter-rotation direction can be further improved.

<Fourth embodiment>
In the fourth embodiment shown in FIGS. 12 to 13, the blade structure 102 </ b> Y is different from the third embodiment in that the blade structure 102 </ b> Y includes angle adjusting parts 124 a and 124 b as angle adjusting parts. In the fourth embodiment, parts having the same configuration as those in the third embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As illustrated in FIGS. 12 and 13, the blade structure 102 </ b> Y includes a pair of angle adjustment units 124 a and 124 b as angle adjustment units. The angle adjustment unit 124a adjusts the angle of the blade 190 when it receives the flow force in the counter-rotation direction, and the angle adjustment unit 124b adjusts the angle of the blade 190 when it receives the flow force in the rotation direction.

  The angle adjusters 124a and 124b are alternately arranged at equal intervals on the same circumference. As a result, the rotation angle TZ of the blade 190 is about half that of the third embodiment. As a result, the distance (hereinafter referred to as the rising distance) that the blade 190 moves from the angle adjusting unit 124a to 124b in response to the rotational force in the rotational direction can be shortened, and the hydrodynamic force is transmitted via the angle adjusting unit 124b. Can be quickly transmitted to the blade structure 102Y. The intervals at which the angle adjusting units 124a and 124b are arranged need not be equal, and the rising distance can be freely set by the arrangement of the angle adjusting units 124a and 124b, and the rising distance can be arbitrarily determined.

  As described above, in the fourth embodiment, by shortening the rising distance until the blade 190 moves to the position where the torque can be transmitted from the angle adjusters 124a to 124b, the flow force in the rotational direction can be quickly increased. Rotational force can be improved by transmitting to the blade structure 102Y.

<Fifth embodiment>
In the fifth embodiment shown in FIGS. 14 to 15, the blade structure 202 is different from the third embodiment in the number of blades 290 and the configuration of the blade rotation mechanism. In the fifth embodiment, parts having the same configuration as those in the third embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 14, the blade structure 202 has 12 blades 290. As shown in FIG. 15, the blade 290 has a tapered shape in which the reaction force receiving surface 293 and the fluid force receiving surface 294 are gently curved and draws an arc, and becomes narrower toward the tip. The radius of curvature of 294 is smaller than the reaction force receiving surface 293. Further, the tip 291 of the blade 290 is slightly curved in the direction opposite to the arc of the reaction force receiving surface 293 and the fluid force receiving surface 294.

  An arc-shaped arc curve 294 a centering on the blade rotation shaft 123 is formed on the base side of the fluid force receiving surface 294, and the arc curve 294 a is connected to the gentle curve of the reaction force receiving surface 293. . This connection portion is provided with a step, and forms a protruding portion 295 that protrudes toward the root side.

  The angle adjustment unit 224 has a flat hexagonal shape and is disposed near the root of the blade 290. When the blade 290 stands perpendicular to the circumferential direction, the projecting portion 295 is caught by the angle adjusting portion 224, and its position is fixed. That is, the angle adjusting unit 224 and the protruding portion 295 constitute an angle to form an angle adjusting unit.

  Further, since the circular arc curve 294a of the fluid force receiving surface 294 does not come into contact with the angle adjusting unit 224, the blade 290 can be largely rotated, and as a result, comes into contact with the adjacent blade 290 (FIG. 14). As a result, when receiving the flow force in the counter-rotating direction, the blades 290 can prevent the fluid from entering, prevent the generation of turbulent flow, and reduce the fluid resistance.

  As described above, in the fifth embodiment, the rotation angle TZ is increased by providing the angle adjustment unit 224 on the base side of the blade 290. Thus, when receiving the fluid force in the rotational direction, the projection 295 is locked to the angle adjusting unit 224 to receive the fluid force, while when receiving the fluid force in the counter-rotating direction, the blades are in contact with the adjacent blades 290. By rotating the 290, the blades 290 can be adjacent to and in contact with each other, and the influence of the fluid force can be reduced.

<Sixth Embodiment>
In the sixth embodiment shown in FIG. 16, the blade structure 202 </ b> X is different from the fifth embodiment in that the blade structure 202 </ b> X includes a connection ring 280 that connects the angle adjustment unit 224. In the sixth embodiment, parts having the same configuration as in the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 16, the connection ring 280 is formed in a circular shape that connects the angle adjustment unit 224, and connects the upper and lower surfaces 126 and 127. Thereby, the strength of the angle adjusting unit 224 and the entire blade structure 202X can be improved, and turbulence can be prevented from occurring inside the connection ring 280. The connection ring 280 may be sealed inside, but the turbulent flow need not be generated. Therefore, it is not necessary to seal the internal space, and holes and gaps can be provided as appropriate.

  Thus, in the sixth embodiment, by providing the connection ring 280 immediately inside the blade 290, turbulent flow generated inside the blade 290 can be prevented in advance, and the rotational force can be improved.

<Seventh embodiment>
In the seventh embodiment shown in FIG. 17, the blade structure 202Y is different from the sixth embodiment in the number of blades 290. Note that in the seventh embodiment, identical symbols are assigned to components having the same configurations as in the sixth embodiment and descriptions thereof are omitted.

  As shown in FIG. 17, the blade structure 202Y has 16 blades 290. In general, it is said that the optimum number of blades for a water turbine is 32. The number of blades 290 is preferably selected as appropriate according to various factors such as the size of the blade structure 202Y, the type and strength of the fluid, and the relationship with the size of the blade structure 202Y.

  Thus, in the seventh embodiment, by increasing the number of blades 290, the fluid force can be received efficiently and the rotational force can be increased.

<Eighth Embodiment>
In the eighth embodiment shown in FIG. 18, the blade structure 202Z is different from the seventh embodiment in the shape of the blade 290Z. Note that in the eighth embodiment, identical symbols are assigned to components having the same configurations as in the seventh embodiment and descriptions thereof are omitted.

  As shown in FIG. 19, the blade 290 </ b> Z has two projecting portions 295 a and 295 b that project toward the root side. The protruding portion 295a is provided on the reaction force receiving surface 293 side. When the blade 290Z protrusion root side stands perpendicular to the circumferential direction, the protruding portion 295a is caught by the angle adjusting portion 224 and the position thereof is fixed.

  On the other hand, the projecting portion 295b is provided on the hydrodynamic receiving surface 294 side, and when the blade 290Z projection root side is nearly parallel to the circumferential direction and is in a lying state, it is caught by the angle adjusting unit 224, The position is fixed.

  Thereby, in the blade | wing 290Z, the rotation angle TZ can be stored in a fixed angle, and a rising force can be shortened and fluid force can be rapidly transmitted to the blade | wing structure 202Z.

  As described above, in the eighth embodiment, since the two protrusions 295a and 295b are provided and the rising distance is reduced while suppressing the generation of turbulent flow by the connection ring 280, the rotational force can be increased.

<Ninth embodiment>
In the ninth embodiment shown in FIGS. 20 to 21, the blade structure 302 is different from the third embodiment in the number and configuration of the blades 390. Note that in the ninth embodiment, identical symbols are assigned to components having the same configurations as in the third embodiment and descriptions thereof are omitted.

  As shown in FIGS. 20 and 21, the blade structure 302 has six blades 390 and is arranged at equal intervals on the circumference. The blades 390 are rotatably installed in the vicinity of the circumferential ends of the upper and lower surfaces 126 and 127.

  The blade 390 has a body part 392, a tip 391 that curves in the counter-rotating direction, and a root 396 that curves in the counter-rotating direction, and the reaction force receiving surface 393 and the fluid receiving surface 394 are gentle S-shaped ( (Or reverse S-shaped). In other words, the blade 390 has a smaller radius of curvature of the fluid force receiving surface 394 than the reaction force receiving surface 393 on the tip side from the blade rotating shaft 123, and more than the reaction force receiving surface 393 on the root side from the blade rotating shaft 123. The fluid receiving surface 394 has a large radius of curvature, and as a whole has a point-symmetric structure with the blade rotation shaft 123 as the center point.

  Compared with the blade 290 (FIG. 14), the blade 390 is formed to have a long base side toward the center, and the tip of the root 396 (FIG. 21) is the outer wall of the air tank 150 when receiving a flow force in the rotation direction. The position is fixed by coming into contact with. That is, the root 396 and the air tank 150 function as an angle adjustment unit. Since the blade 390 has a large area, the blade 390 can be converted into a rotational force without missing the fluid force in the rotational direction.

  On the other hand, the vane 390 has a very large rotation angle TZ and is separated from the adjacent vane 390, so that it has the least resistance to the flow force in the counter-rotating direction, that is, substantially parallel to the circumferential direction. You can stay in a state of sleeping.

  Thus, in the ninth embodiment, the blade 390 is greatly extended inward and is locked by the air tank 150, so that the area of the blade 390 can be increased and the flow force in the rotational direction can be greatly received. In addition, the degree of freedom can be improved with respect to the flow force in the counter-rotation direction, the flow force resistance can be minimized, and the rotation force of the blade structure 302 can be improved.

<Tenth Embodiment>
In the tenth embodiment shown in FIG. 22, the blade structure 302X is different from the ninth embodiment in the position of the blade rotation shaft 123. Note that in the tenth embodiment, identical symbols are assigned to components having the same configurations as in the ninth embodiment and descriptions thereof are omitted.

  As shown in FIG. 22, the blade 390 </ b> X has the blade rotation shaft 123 positioned at the root side from the center, and the rotation shaft of the blade 390 </ b> X is eccentric. Accordingly, the blade 390X can easily rotate the blade 390X by concentrating the flow force on one side, and the switching force between the reaction force receiving surface 393 and the fluid force receiving surface 394 can be quickly increased to increase the rotation force of the blade structure 302X. be able to. The direction of eccentricity may be either the center side or the circumferential side.

  Thus, in the tenth embodiment, by intentionally breaking the balance between the root side and the tip side of the blade 390X having a large area, the flow force received by the blade 390X may be biased on the root side and the tip side. The blade 390X can be quickly rotated to increase the rotational force of the blade structure 302X.

<Eleventh embodiment>
In the eleventh embodiment shown in FIG. 23, the blade structure 402 does not have the upper and lower surfaces 126 and 127, and the outer wall of the air tank 450 is partially recessed to serve as an angle adjustment unit together with the base side of the blade 490. It differs from the third embodiment in that it has a function. Note that in the eleventh embodiment, identical symbols are assigned to components having the same configurations as in the third embodiment and descriptions thereof are omitted.

  As shown in FIG. 23, in the blade structure 402, the outer wall 451 of the air tank 450 is formed thick, and the dent 452 is formed. The recess 452 has a function of locking the blade 490 and adjusting its angle, like the angle adjusting unit 224 (FIG. 14). The dent 452 is formed in a circular arc shape, and has a locking portion 452a that protrudes from the circular arc shape at the end on the flow force receiving surface 494 side.

  As shown in FIG. 24, the blade 490 has its root side greatly curved from the vicinity of the blade rotation shaft 123 toward the fluid force receiving surface 494, and when receiving the fluid force in the rotational direction, the tip of the root portion 496 is moved. The position is fixed by being locked by a locking portion 452 a formed in the recess 452.

  The blade structure 402 does not have the upper and lower surfaces 126 and 127, and as shown in FIGS. 25 and 26 showing a partial cross section of the recess 452, the upper and lower surface portions 451x extended in the vertical direction from the outer wall 451. The blade rotation shaft 123 is connected to the outer wall 451 by having the shaft extension 123x fixed to the outer wall 451 or extending to the outer wall 451. That is, in the blade structure 402, the air tank 450 serves as a support member that supports the blade 490.

  As described above, in the eleventh embodiment, the depression 452 formed in the outer wall 451 of the air tank 450 and the root portion 496 of the blade 490 constitute an angle adjustment mechanism. Thereby, since there is nothing other than the blade | wing 490, the blade | wing structure body 402 protrudes outside the air tank 450, Therefore It can prevent generation | occurrence | production of a turbulent flow and can improve durability.

<Twelfth embodiment>
In the twelfth embodiment shown in FIG. 27, the blade structure 402X is different from the eleventh embodiment in the shape of the outer wall 451X. Note that in the twelfth embodiment, identical symbols are assigned to components having the same configurations as in the eleventh embodiment and descriptions thereof are omitted.

  As shown in FIG. 27, in the blade structure 402X, a protruding portion 451Xa that is a protruding portion in the vicinity of the locking portion 452a in the outer wall 451X and a recess 452X are formed in a substantially linear shape. In other words, the outer wall 451X has a substantially hexagonal shape as a whole, the protruding portion 451Xa is formed at the corner portion, and the locking portion 452a is formed on the rotation direction side of the protruding portion 451Xa.

  In this way, by forming the outer wall 451 of the air tank 450 in a polygonal shape, the flow resistance in the counter-rotating direction can be reduced by the outer wall 451 using the shape of each side of the polygon, It is possible to receive a fluid force, and the rotational force of the blade structure 402X can be increased. Note that the shape of each side of the outer wall 451 is not particularly limited, and various shapes can be used. Of course, a polygonal shape other than a hexagonal shape may be used according to the number of blades 490.

<Thirteenth embodiment>
In the thirteenth embodiment shown in FIGS. 28 to 29, the blade structure 502 is different from the second embodiment in that the shape of the blade 590, the arrangement of the angle adjusting unit 124, and the center support 125 are not provided. ing. Note that in the thirteenth embodiment, identical symbols are assigned to components having the same configuration as in the second embodiment and description thereof is omitted.

  As shown in FIG. 28, the blade 590 is substantially flat except that the vicinity of the blade rotation shaft 123 is slightly swollen, and has a long portion 592x and a length shorter than the long portion 592x around the blade rotation shaft 123. A short portion 592y. The blade rotation shaft 123 is disposed in the vicinity of the circumference of the upper and lower surfaces 126 and 127, and fixes the blade 590 in a rotatable state. The blade 590 has the blade rotation shaft 123 located at a position deviated from the center, and locks the root portion 596, which is the end of the long portion 592 x, to the angle adjustment unit 124 against the flow force in the rotation direction. And fix the position.

  Further, the blade 590 can rotate without bringing the tip 591 which is the end of the short portion 592y into contact with the angle adjustment unit 124. For this reason, with respect to the flow force in the counter-rotating direction, the blade 590 directs the tip 591 toward the upstream side where the fluid flows so that the fluid resistance becomes small.

  As shown in FIG. 29, the blade 590 has two leading protrusions 591x having a rounded tip 591. The leading protrusion 591x is preferably formed in a shape corresponding to the fluid and has a shape in which the fluid resistance is minimized. Of course, the number of the tip protrusions 591x is not limited and may be only one.

  As described above, in the thirteenth embodiment, the blade 590 has a shape close to a flat plate, the angle adjusting unit 124 is disposed on the root side, and only one end of the both ends of the blade 590 serves as the angle adjusting unit 124. The blade rotation shaft 123 is eccentric so as to come into contact. Thereby, the blade structure 502 can reduce the fluid resistance to the blade 590 with respect to the flow force in the counter-rotating direction as much as possible, and can increase the rotational force.

<Fourteenth embodiment>
In the fourteenth embodiment shown in FIG. 30, the blade structure 602 has a reaction force hood 570 in a region where the outer wall 651 has a triangular shape and a flow force in the counter-rotating direction is applied. Is different from the eleventh embodiment. Note that in the fourteenth embodiment, identical symbols are assigned to components having the same configurations as in the eleventh embodiment and descriptions thereof are omitted.

  As shown in FIG. 30, the blade 690 has a substantially flat plate shape, and the tip 691 is slightly tapered. A recess 652 is formed in the outer wall 651 of the air tank 650, and a locking portion 652a is formed on the reaction force receiving surface 693 side. A gentle slope 652b is formed on the flow force receiving surface 694 side of the recess 652, and the blade 690 can be placed on the outer wall 651 along this slope.

  The outer wall 651 has a substantially triangular shape in which each side slightly swells as a whole, and each side plays a role of receiving a flow force. Three blades 690 are arranged on each side. In addition, there is no restriction | limiting in the number of the blade | wings 690 arrange | positioned per side, and the shape of each side, According to the kind of fluid, intensity | strength, etc., it can change suitably.

  The blade structure 602 includes a reaction force hood 570 that connects the upper and lower surfaces 126 and 127 on the outermost side of a region to which a fluid force in the counter-rotating direction is applied (hereinafter referred to as a reaction force region, which indicates the left half of the drawing). is set up. The reaction force hood 570 may be formed in a semicircular shape, for example, in the entire reaction force region, or may be partially formed in the reaction force region, for example. The reaction force hood 570 is preferably formed in more than half of the reaction force region, more preferably 2/3 or more. Thereby, in the reaction force region, the force in the counter-rotating direction applied to the rotating body (blade 690, air tank 650, and central rotating shaft 103) can be minimized.

  In addition, it is preferable to install the blade | wing structure body 602 in the location where the direction of fluid force is decided like a river, a groove | channel, etc., for example.

  Thus, in the fourteenth embodiment, the outer wall 651 has a polygonal shape, and a plurality of blades 690 are arranged on one side. Thus, in the blade structure 602, the shape of the outer wall 651 can be optimized regardless of the number of blades 690, and the rotational force can be increased.

  Further, in the blade structure 602, the upper and lower surfaces 126 and 127 and the blade rotating shaft 123 are not connected, and only the rotating body rotates, and the reaction force hood 570 is provided in the reaction force region. Thereby, the blade structure 602 can minimize the counter-rotating force applied to the rotating body, and can increase the rotating force.

<Operation and effect>
According to the above configuration, the blade structure has a plurality of blades that receive the fluid force that is the force of the fluid, and the rotation shaft (blade rotation shaft 123) that supports the blades and extends in a direction perpendicular to the fluid force. And a support member (upper and lower surfaces 126 and 127, or air tanks 450 and 650) that can rotate freely, and a blade rotation mechanism that freely rotates the blades by a predetermined rotation angle around the rotation axis.

  Thus, the blade structure can increase the rotational force because the angle of the fluid force receiving surface that receives the rotational force in the rotational direction and the angle of the reaction force receiving surface that receives the fluid force in the counter rotating direction can be made different. .

  The blade rotation mechanism includes a blade rotation shaft that is attached to the support member and rotates the blade around the rotation axis, and an angle adjustment unit that adjusts the rotation angle of the blade, and a part of the blade is brought into contact with the angle adjustment unit. Thus, the rotation angle of the blade is adjusted.

  The angle adjusting unit is a rod or a protrusion that suppresses the rotational movement of the blade, and an elastic material is used at least at a part of the portion that contacts the blade. Thereby, while reducing the sound which generate | occur | produces when a blade | wing and an angle adjustment part contact | abut, damage to a contact location can be prevented.

  The angle adjustment unit adjusts the rotation angle of the blade so that the inclination of the blade in the rotation direction of the blade structure is smaller than the inclination of the blade in the counter-rotation direction that is the reverse direction of the rotation direction.

  An angle adjustment part adjusts a rotation angle by latching the edge part vicinity of the root side in a blade | wing. As a result, the angle adjusting unit can set the rotation angle of the blades large, and abuts on the base side of the blades having a low speed, so that the impact at the time of contact can be reduced.

  The blade adjusts the rotation angle by contacting an adjacent blade. Thereby, in the reaction force region to which the hydrodynamic force in the counter rotation direction is applied, the gap generated between the blades can be reduced, and the turbulent flow generated between the blades can be reduced.

  The angle adjustment unit is a protrusion provided outside the ring (connection ring 280). Thereby, the intensity | strength of an angle adjustment part can be increased compared with the case where the angle adjustment part is provided alone.

  As a part of the angle adjustment unit, the blade has a protruding portion in contact with the angle adjustment unit in the vicinity of the end on the root side. Thereby, regardless of the shape of the main body portion of the blade, the blade can be locked at a free angle, and the degree of freedom in design can be improved.

  Since the blade has two protrusions, the rotation angle can be freely adjusted.

  The blade rotation shaft is disposed at a position shifted from the center of the blade. Thereby, a blade | wing accelerate | stimulates a rotation when receiving a fluid force, can speed-change the surface (a fluid force receiving surface and a reaction force receiving surface) which receives a fluid force, and can improve a rotational force.

  The blade structure has a ring (outer walls 451, 451X, and 651) in which an angle adjustment portion is formed on the center side from the blade, and the shape of the ring is selected so as to rotate by receiving a flow force. .

  Thereby, in addition to a blade | wing, the blade | wing structure body can increase rotational force also by the fluid force with respect to a ring.

  The blade structure has an air tank that is used in water and filled with gas in a sealed state. Accordingly, the blade structure can adjust the specific gravity of the blade structure so that the buoyancy and gravity in water are hardly applied, and the posture in water can be stabilized.

  In the blade, the fluid force receiving surface that receives the fluid force in the rotational direction is subjected to surface processing for increasing fluid resistance. Thereby, the force received in the rotation direction can be increased.

  In the blade, the reaction force receiving surface that receives the fluid force in the counter-rotating direction opposite to the rotating direction is subjected to surface processing for reducing fluid resistance. Thereby, the force received in the anti-rotation direction can be reduced.

  The present invention is not limited to the first to fourteenth embodiments, and the number and shape of each part such as a blade, a support member, an angle adjustment unit, a rotation shaft, an air tank, and upper and lower surfaces are appropriately combined and changed. It is possible. In short, it is important to control the flow of the fluid while receiving a large amount of fluid in the rotational direction and a small amount of fluid in the counter-rotating direction, and it is optimal depending on factors such as the type of fluid, directionality and strength. It is preferable to combine the parts.

  The present invention can be applied to a power generation system used for, for example, wind power, hydraulic power, and tidal power generation.

1: Power generation system 2: Blade structure 3: Center rotation shaft 4: Power generation device 21: Center hole 22, 122, 190, 290, 390, 490, 590, 690: Blade 23, 123: Blade rotation shaft 24, 124: Angle adjustment unit 25: center support 26: upper and lower surfaces 27: upper and lower surfaces 102, 102X, 102Y, 202, 202X, 202Y, 202Z: blade structure 103: center rotation shaft 123: blade rotation shafts 126, 127: upper and lower surfaces 130 : Adjustment ring 150: Air tank 193: Reaction force receiving surface 194: Fluid force receiving surfaces 295, 295a, 295b: Protruding part TZ: Rotation angle

Claims (15)

A plurality of blades that receive the fluid force of the fluid,
A support member that supports the blades and is rotatable about a rotation axis extending in a direction perpendicular to the fluid force;
A blade structure having a blade rotation mechanism for freely rotating the blade by a predetermined rotation angle around the rotation axis. The blade rotation mechanism is
A blade rotation shaft attached to the support member and rotating the blade around the rotation shaft;
The blade structure according to claim 1, further comprising an angle adjustment unit that adjusts the rotation angle of the blade. The angle adjuster is
The blade structure according to claim 1 or 2, wherein an elastic material is used in at least a part of a portion that is a rod or a protrusion that inhibits the rotation operation of the blade and contacts the blade. The angle adjuster is
The rotation angle of the blade is adjusted so that the degree of inclination of the blade in the rotation direction of the blade structure is smaller than the degree of inclination of the blade in the counter-rotation direction that is the reverse direction of the rotation direction. The blade structure according to any one of claims 2 to 4, wherein The angle adjuster is
The blade structure according to any one of claims 2 to 4, wherein the rotation angle is adjusted by locking a vicinity of an end portion on a root side of the blade. The blade is
The blade structure according to any one of claims 2 to 5, wherein the rotation angle is adjusted by contacting an adjacent blade. The angle adjuster is
The blade structure according to claim 2, wherein the blade structure is a protrusion provided outside the ring. The blade is
As part of the angle adjustment unit,
The blade structure according to any one of claims 2 to 7, further comprising a projecting portion that is in contact with the angle adjusting portion in the vicinity of an end portion on a root side. The blade is
The blade structure according to claim 8, comprising the two protruding portions. The blade rotation axis is
The blade structure according to claim 5, wherein the blade structure is disposed at a position shifted from a center of the blade. The blade structure is
On the center side of the blade, it has a ring in which the angle adjustment portion is formed,
The ring is
The blade structure according to any one of claims 1 to 10, wherein the shape is selected so as to rotate in response to the flow force. The blade structure is
Used underwater,
It has an air tank filled with gas in the airtight state. The blade | wing structure in any one of Claims 1-11 characterized by the above-mentioned. In the blade, the hydrodynamic receiving surface that receives the hydrodynamic force in the rotational direction,
The surface structure which increases fluid resistance is given. The blade | wing structure in any one of Claims 1-12 characterized by the above-mentioned. In the blade, the reaction force receiving surface that receives the fluid force in the counter-rotation direction opposite to the rotation direction,
The surface structure which reduces fluid resistance is given. The blade | wing structure in any one of Claims 1-13 characterized by the above-mentioned. A rotation axis extending in a direction perpendicular to the fluid force that is the force of the fluid;
A plurality of blades that receive the flow force; a support member that supports the blades and that is rotatable about a rotation axis extending in a direction perpendicular to the flow force; and the blades at a predetermined rotation angle around the rotation axis. A blade structure having a blade rotation mechanism that freely rotates the blade, and
A power generation system comprising: a power generation device that converts rotational force of the blade structure transmitted through the rotation shaft into electric power.

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