Drag type turbine device, wind power rotation device, hydraulic rotation device, or tidal power rotation device using the same, and wind power generator, hydraulic generator, or tidal power generator using the same

Abstract

To provide a drag type turbine device which can prevent overspeed of pressure receiving members.SOLUTION: A drag type turbine device (a vertical axis drag type wind power generator 1A) includes: a support shaft 3; a plurality of support members 4; a plurality of pressure receiving members 5 disposed between the adjacent support members 4 and supported by the support members 4; and a plurality of flap members 6 each of which is connected to the pressure receiving member 5 through a flap opening / closing mechanism 7. Each of the plurality of flap members 6 has a flap wall surface part 60 extending between a base end 61 which is disposed close to an inner end 54 relative to pressure receiving wall surface parts 50 to 52 and a tip 62 disposed at the radial outer side relative to the pressure receiving wall surface parts 50 to 52 in a plan view perpendicular to an axial direction. Further, each flap member 6 is connected to the pressure receiving member 5 through the flap opening / closing mechanism 7 so that the flap member may move between a closed position P1 where the flap wall surface part 60 is arranged along the pressure receiving wall surface parts 50 to 52 and an open position P2 where the flap wall surface part 60 forms a predetermined angle θ1 relative to the pressure receiving wall surface parts 50 to 52.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a drag type turbine device, a wind powered rotating device, a hydroelectric rotating device, and a tidal powered rotating device that use the drag type turbine device, as well as a wind power generator, a hydroelectric power generator, and a tidal power generator that use the drag type turbine device. [Background technology]

[0002] Rotating devices and generators using drag-type turbine devices have been known. For example, drag-type wind power generators include a Savonius wind turbine having a pressure-receiving member (also called a blade or bucket) with a C-shaped (arc-shaped) cross section, and a Bach wind turbine having a pressure-receiving member with a J-shaped cross section. Drag-type wind power generators include a brake device that applies a braking force to a rotating shaft to which the pressure-receiving member is connected in order to stop the pressure-receiving member from rotating (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-074403 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a drag type wind power generator equipped with a brake device, when a strong wind (such as a typhoon or a storm) that exceeds a predetermined wind speed is received, an excessive load is applied to the brake device, and there is a risk of the brake device being damaged. As a result, the pressure-receiving member in the drag type wind power generator over-rotates, and there is a risk of the drag type wind power generator itself being damaged.

[0005] Therefore, an object of the present invention is to provide a resistance type turbine device that makes it possible to prevent over-rotation of a pressure-receiving member, a wind-powered rotation device, a hydroelectric rotation device, and a tidal rotation device that use the resistance type turbine device, as well as a wind turbine generator, a hydroelectric generator, and a tidal generator that use the resistance type turbine device. [Means for solving the problem]

[0006] The present invention aims to solve the above problems, and provides a drag type turbine device according to one embodiment of the present invention, A support shaft that is rotatably supported; A plurality of support members are arranged at predetermined intervals in the axial direction of the support shaft, at least one of which is fixed to the support shaft; a plurality of pressure-receiving members that are disposed symmetrically with respect to the central axis of rotation of the support shaft between adjacent support members and supported by the support members; a plurality of flap members respectively connected to the plurality of pressure-receiving members via flap opening / closing mechanisms; Each of the plurality of pressure-receiving members includes a pressure-receiving wall portion extending between an outer end and an inner end disposed radially inward of the outer end on the opposite side of the outer end with respect to the rotation central axis in a plan view perpendicular to the axial direction, Each of the plurality of flap members includes: When viewed in the plane, the flap wall portion extends between a base end that is positioned toward the inner end relative to the pressure-receiving wall portion and a tip end that is positioned radially outward relative to the pressure-receiving wall portion, and is connected to the pressure-receiving member via the flap opening and closing mechanism so as to be movable between a closed position in which the flap wall portion is positioned along the pressure-receiving wall portion and an open position in which the flap wall portion forms a predetermined angle with respect to the pressure-receiving wall portion.

[0007] A wind powered rotating device, a water powered rotating device, or a tidal powered rotating device according to one embodiment of the present invention uses the drag type turbine device.A wind powered generator, a water powered generator, or a tidal powered generator according to one embodiment of the present invention uses the drag type turbine device. Effect of the Invention

[0008] According to the drag type turbine device of the embodiment of the present invention, each of the plurality of flap members is connected to the pressure-receiving member via a flap opening / closing mechanism so as to be movable between a closed position where the flap members are disposed along the pressure-receiving wall portion and an open position where the flap members form a predetermined angle with respect to the pressure-receiving wall portion. This allows the flap members to move between the closed position and the open position with respect to the pressure-receiving member. Therefore, the magnitude of the rotational force generated in the pressure-receiving member is changed depending on the position of the flap members.

[0009] Specifically, when the flap member is in a closed position arranged along the pressure-receiving member, a rotational force is generated in the pressure-receiving member when the pressure-receiving member receives wind, causing the support shaft to rotate. On the other hand, when the flap member is in an open position forming a predetermined angle with respect to the pressure-receiving member, even if the pressure-receiving member receives wind, the generation of a rotational force in the pressure-receiving member is suppressed, resulting in a feathering state and the rotation of the support shaft being stopped. Therefore, in the event of a strong wind exceeding a predetermined wind speed, the flap member is moved to the open position to function as an aerodynamic brake, thereby preventing overrotation of the pressure-receiving member. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1A according to a first embodiment. [Diagram 2] FIG. 2 is a partially exploded perspective view showing an example of a vertical axis drag type wind power generator 1A when a flap member 6 is arranged in a closed position P1. [Diagram 3] FIG. 2 is a partially exploded perspective view showing an example of a vertical axis drag type wind power generator 1A when a flap member 6 is arranged in an open position P2. [Figure 4] FIG. 2 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1A when a flap member 6 is arranged in a closed position P1. [Diagram 5] FIG. 2 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1A when a flap member 6 is arranged in an open position P2. [Figure 6] FIG. 1 is a schematic diagram showing an example of the arrangement of a vertical axis drag type wind power generator 1A according to a first embodiment and each parameter. [Figure 7] 13 is a graph showing a simulation result of the output coefficient Cp when the angle θ1 of the flap member 6 is changed. [Figure 8] FIG. 11 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1B according to a second embodiment. [Figure 9] FIG. 2 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1B when a flap member 6 is arranged in an open position P3. [Figure 10] FIG. 11 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1C according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Specific embodiments of the present invention will be described below. The embodiments are merely examples, and the present invention is not limited to these examples. In the following embodiments, a vertical axis drag type wind power generator 1 (1A to 1C) using a drag type turbine device will be described as one application example of the drag type turbine device. In addition, in the description of the embodiments, "parallel" includes not only the case of being completely parallel, but also the case of being approximately parallel with a degree of deviation that does not impair the function of the vertical axis drag type wind power generator 1. Similarly, "vertical" includes not only the case of being completely vertical, but also the case of being approximately vertical with a degree of deviation that does not impair the function of the vertical axis drag type wind power generator 1. Furthermore, in the description of the embodiments, "arc" includes not only the case of being a completely circular arc, but also the case of being approximately arc with a degree of deviation that does not impair the function of the vertical axis drag type wind power generator 1.

[0012] (First embodiment) FIG. 1 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1A according to the first embodiment. FIG. 2 is a partially exploded perspective view showing an example of the vertical axis drag type wind power generator 1A when the flap member 6 is arranged in the closed position P1. FIG. 3 is a partially exploded perspective view showing an example of the vertical axis drag type wind power generator 1A when the flap member 6 is arranged in the open position P2. FIG. 4 is a cross-sectional view showing an example of the vertical axis drag type wind power generator 1A when the flap member 6 is arranged in the closed position P1. FIG. 5 is a cross-sectional view showing an example of the vertical axis drag type wind power generator 1A when the flap member 6 is arranged in the open position P2.

[0013] The vertical-axis drag type wind power generator 1A includes a support housing 2 installed on an installation surface (not shown), a support shaft 3 rotatably supported by the support housing 2, a plurality of support members 4 arranged at a predetermined interval L1 with respect to the axial direction Da of the support shaft 3, at least one of which is fixed to the support shaft 3, a plurality of pressure-receiving members 5 arranged between the plurality of support members 4 and supported by the plurality of support members 4, and a plurality of flap members 6 each connected to the plurality of pressure-receiving members 5 via a flap opening / closing mechanism 7. The vertical-axis drag type wind power generator 1A functions as a drag type wind turbine, with the support shaft 3 rotating in the traveling direction Dt (clockwise in this embodiment (see FIG. 4)) when the pressure-receiving member 5 receives wind pressure (fluid pressure) due to wind (air flow) flowing from a predetermined direction.

[0014] Each component of the vertical axis drag type wind power generator 1A (support housing 2, support shaft 3, support member 4, pressure receiving member 5, flap member 6, flap opening / closing mechanism 7) is made of, for example, metal materials (including alloys) such as aluminum, stainless steel, titanium, and steel, fiber reinforced resin materials such as carbon fiber reinforced resin and glass fiber reinforced resin, resin materials such as polycarbonate and polyvinyl chloride, or composite materials of these. Each component may be made by appropriately combining various materials such as those described above, and for example, each component may be made of a different material, or some or all of the components may be made of a common material.

[0015] In this embodiment, as shown in Fig. 1, the vertical axis drag type wind power generator 1A includes four support members 4 as the multiple support members 4. The vertical axis drag type wind power generator 1A also includes multiple pressure receiving members 5 as the multiple pressure receiving members 5, which are arranged in pairs symmetrically with respect to the rotation center axis O1 of the support shaft 3 between each of the four support members 4, i.e., between adjacent support members 4. That is, the vertical axis drag type wind power generator 1A includes six pressure receiving members 5 in total.

[0016] The support housing 2 is a cylindrical housing arranged coaxially with the support shaft 3. The support housing 2 includes, at its upper portion, a power generation unit 20 that supports the support shaft 3 and converts the rotational energy generated when the support shaft 3 rotates into electrical energy. As shown in FIG. 1, the support housing 2 may support only the lower end side of the support shaft 3, or may support the upper end side of the support shaft 3 in addition to the lower end side (which may be the upper end of the support shaft 3 or a shaft member connected to the upper end of the support shaft 3). The support housing 2 may also be a truss-shaped housing.

[0017] The power generating unit 20 is, for example, an outer rotor type generator. The power generating unit 20 may be an inner rotor type generator. The support shaft 3 and the power generating unit 20 may be directly connected to each other or may be connected to each other via a gearbox.

[0018] The support shaft 3 is composed of a cylindrical or columnar shaft member, and is supported by the power generation unit 20 around the central rotation axis O1. As shown in Fig. 2, the support shaft 3 may be composed of a single shaft member, or may be composed of multiple (three in this embodiment) connected shaft members having a length approximately equal to the interval L1.

[0019] Each of the multiple support members 4 is plate-shaped and is made of, for example, a flat plate material. In this embodiment, the support members 4 are fixed to the support shaft 3 by any fixing method (welding, adhesive, screw fixing, press fitting, rivet, pin connection, joint, etc.) so that the support shaft 3 penetrates near the center of the support members 4. At this time, the support members 4 are fixed to the support shaft 3 via a connecting and fixing member 30 (not shown in FIG. 2) formed, for example, in a ring or flange shape. In addition, the support members 4 are fixed to the pressure-receiving member 5 by any fixing method (details will be described later) to support the pressure-receiving member 5.

[0020] It is sufficient that at least one of the support members 4 is fixed to the support shaft 3. For example, the support members 4 arranged at both ends of the support shaft 3 (the first and fourth support members 4 from the bottom in the example of FIG. 1) may be fixed to the support shaft 3 via the connecting and fixing member 30. In this case, a part or all of the intermediate support members 4 arranged between the both ends (the second and third support members 4 from the bottom in the example of FIG. 1) may be fixed to the support shaft 3 via the connecting and fixing member 30, or may not be fixed. The intermediate support members 4 that are not fixed to the support shaft 3 connect the pressure-receiving members 5 to each other in the axial direction Da and function as connecting and reinforcing members that reinforce the pressure-receiving members 5. For example, the support shaft 3 may pass through a through hole formed in the support member 4, or a connecting elastic member formed in a ring shape of an elastic material such as rubber may be arranged to close the gap between the support shaft 3 and the through hole of the support member 4.

[0021] The support member 4 has, as a shape (planar view shape) in a plan view (see FIG. 4) perpendicular to the axial direction Da, a pair of curved outer contour portions 40 curved along outer wall surface portions 50 (details will be described later) of the pair of pressure-receiving members 5, and a pair of linear outer contour portions 41 linearly formed so as to connect the pair of curved outer contour portions 40 along intermediate wall surface portions 51 and inner wall surface portions 52 (details will be described later) of the pair of pressure-receiving members 5. Thus, the support member 4 is formed in a plan view by two linear portions arranged in parallel and two curved portions connecting both ends of the two linear portions in a curved shape.

[0022] Each of the pair of pressure-receiving members 5 is disposed around the support shaft 3 between adjacent support members 4 along the axial direction Da and spaced apart in radial directions Dr1, Dr2 of the support shaft 3. In a plan view perpendicular to the axial direction Da (see FIG. 4), the pressure-receiving member 5 has pressure-receiving wall surfaces 50-52 extending between an outer end 53 disposed on the radially outer side Dr1 and an inner end 54 disposed on the opposite side to the outer end 53 with respect to the central rotation axis O1 and radially inward Dr2 of the outer end 53.

[0023] In this embodiment, the pressure-receiving member 5 has, as the pressure-receiving wall surface portions 50-52, an outer wall surface portion 50 arranged near the outer end 53, an inner wall surface portion 52 arranged near the inner end 54, and an intermediate wall surface portion 51 arranged between the outer wall surface portion 50 and the inner wall surface portion 52. The pressure-receiving member 5 also has an outer boundary portion 55 arranged at the boundary portion between the outer wall surface portion 50 and the intermediate wall surface portion 51, and an inner boundary portion 56 arranged at the boundary portion between the intermediate wall surface portion 51 and the inner wall surface portion 52. The outer boundary portion 55 is arranged on the side of the traveling direction Dt of the pressure-receiving member 5 and closer to the rotation central axis O1 with respect to the outer end 53. The inner boundary portion 56 is arranged on the side of the traveling direction Dt of the pressure-receiving member 5 and closer to the rotation central axis O1 with respect to the outer boundary portion 55. Furthermore, the pressure-receiving member 5 has an outer mounting portion 57, an intermediate mounting portion 58, and an inner mounting portion 59 as mounting portions 57-59 for mounting both ends of the pressure-receiving member 5 in the axial direction Da to the support member 4, respectively.

[0024] The outer wall surface portion 50 is a wall surface portion that is extended from the outer end 53 toward the traveling direction side Dt and the support shaft 3, and is formed in a convex shape that bulges outward in the radial direction Dr1. The outer wall surface portion 50 may have a convex shape that does not obstruct the flow of air, and may be, for example, a curved surface shape whose planar shape is an arc, an elliptical arc, or other curved line, a polygonal surface shape whose planar shape is a polygonal surface with an obtuse interior angle, or a combination of a curved surface shape and a polygonal surface shape. When the outer wall surface portion 50 is a curved surface shape of an arc, the central angle of the arc is preferably, for example, in the range of 75 degrees to 135 degrees, and more preferably in the range of 90 degrees to 120 degrees. When the outer wall surface portion 50 has a planar shape other than an arc, it may be extended to a range similar to that of an arc.

[0025] The intermediate wall surface portion 51 is a wall surface portion that extends from the outer wall surface portion 50 via the outer boundary portion 55 toward the traveling direction side Dt and the support shaft 3, and is formed in a convex or flat shape that bulges outward in the radial direction Dr1 more gently than the outer wall surface portion 50. The intermediate wall surface portion 51 may have a different shape in plan view from the outer wall surface portion 50. For example, the convex shape may be a curved shape whose plan view shape is a circular arc, an elliptical arc, or other curved line, or a polygonal shape whose plan view shape is a polygon with obtuse interior angles, or a combination of a curved shape and a polygonal shape. The intermediate wall surface portion 51 may also be a flat shape whose plan view shape is a straight line. When the planar shape of the outer wall surface portion 50 is a curved surface such as a circular or elliptical arc, the intermediate wall surface portion 51 may be planar and disposed on a tangent line extended from the end portion of the outer wall surface portion 50 on the outer boundary portion 55 side, and the outer boundary portion 55 may be located at the boundary between the outer wall surface portion 50 (circular or elliptical arc) and the intermediate wall surface portion 51 (tangent line to the circular or elliptical arc). This allows the air to flow smoothly from the outer wall surface portion 50 toward the intermediate wall surface portion 51.

[0026] The inner wall surface portion 52 is a wall surface portion that extends from the intermediate wall surface portion 51 via the inner boundary portion 56 to an inner end 54 that is disposed on the traveling direction side Dt of the intermediate wall surface portion 51, and is formed in a convex or flat shape that bulges outward in the radial direction Dr1. For example, the inner wall surface portion 52 may be convex in shape, and may be a curved surface having a planar shape that is a circular arc, an elliptical arc, or another curve, or may be a polygonal surface having a planar shape that is a polygon with obtuse interior angles. The inner wall surface portion 52 may also be flat in shape that is a straight line in a planar shape.

[0027] The intermediate wall surface portion 51 and the inner wall surface portion 52 are arranged so as to be convex toward the radially outward side Dr1 via the inner boundary portion 56 in a plan view, so that the intermediate wall surface portion 51 and the inner wall surface portion 52 form an obtuse angle on the support shaft 3 side. Note that the outer wall surface portion 50 and the intermediate wall surface portion 51 may also be arranged so as to be convex toward the radially outward side Dr1 via the outer boundary portion 55 in a plan view, so that the outer wall surface portion 50 and the intermediate wall surface portion 51 form an obtuse angle on the support shaft 3 side.

[0028] The outer boundary 55 and the inner boundary 56 are formed in a curved or bent shape. The shapes of the outer boundary 55 and the inner boundary 56 may be the same or different. When the outer boundary 55 is curved, it may be formed in the same curved shape as the outer wall surface 50 or the intermediate wall surface 51, and when the inner boundary 56 is curved, it may be formed in the same curved shape as the intermediate wall surface 51.

[0029] The pressure-receiving wall surface portions 50-52 may be formed integrally with adjacent portions or the entirety of each portion (the outer wall surface portion 50, the outer boundary portion 55, the intermediate wall surface portion 51, the inner boundary portion 56, and the inner wall surface portion 52), or may be formed by joining a plurality of parts. For example, when the entirety of the pressure-receiving wall surface portions 50-52 (the outer wall surface portion 50, the outer boundary portion 55, the intermediate wall surface portion 51, the inner boundary portion 56, and the inner wall surface portion 52) is formed integrally, the pressure-receiving member 5 may be manufactured by bending a flat metal plate, a resin plate, or the like in an area corresponding to each portion. This eliminates seams and fasteners in the pressure-receiving wall surface portions 50-52, thereby reducing the fluid resistance of the pressure-receiving member 5.

[0030] Furthermore, when the pressure-receiving wall surface portions 50-52 are formed as separate parts, they may be composed of three parts divided at the outer boundary portion 55 and the inner boundary portion 56, or may be composed of two parts divided near the middle of the intermediate wall surface portion 51. The pressure-receiving member 5 may be manufactured by fixing each part via a fixing portion using any of the above-mentioned fixing methods.

[0031] In this embodiment, the pressure-receiving member 5 is formed such that the entire pressure-receiving wall surface portions 50 to 52 are integrally formed as shown in Fig. 4. In this case, the outer wall surface portion 50 is formed into a curved surface shape that is an arc with a curvature radius R when viewed from above, the intermediate wall surface portion 51 and the inner wall surface portion 52 are each formed into a linear flat surface shape when viewed from above, and the outer boundary portion 55 and the inner boundary portion 56 are formed into a curved surface shape that is an arc when viewed from above.

[0032] The pair of pressure receiving members 5 are symmetrically arranged around the support shaft 3, separated from each other in the radial directions Dr1 and Dr2 of the support shaft 3 and shifted by 180 degrees. Therefore, the intermediate wall surface portion 51 of one pressure receiving member 5 and the inner wall surface portion 52 of the other pressure receiving member 5 are arranged in opposing positions, and a gap is formed between each inner boundary portion 56 of the pair of pressure receiving members 5 and the outer circumferential surface of the support shaft 3. The intermediate wall surface portion 51 and the inner wall surface portion 52 of each of the pair of pressure receiving members 5 are arranged so as to be convex toward the radially outer side Dr1 via the inner boundary portion 56, so that the interval between the pair of pressure receiving members 5 in a plan view is relatively narrow on the inner end 54 side and relatively wide on the inner boundary portion 56 side. Therefore, the interval between the pair of pressure receiving members 5 becomes wider as the pair of pressure receiving members 5 approaches the support shaft 3 side.

[0033] Furthermore, when the pair of pressure-receiving members 5 are disposed symmetrically, the inner end 54 of one pressure-receiving member 5 is preferably disposed on the traveling direction side Dt of a line connecting the outer end 53 of the other pressure-receiving member 5 and the rotational center axis O1 of the support shaft 3 in a plan view, and more preferably disposed on the traveling direction side Dt of a line connecting the outer end 53 of the other pressure-receiving member 5 and the inner boundary portion 56 (dashed line in FIG. 4 described later). This allows the width of the passage formed between the pair of pressure-receiving members 5 to be appropriately set.

[0034] The outer mounting portion 57, the intermediate mounting portion 58, and the inner mounting portion 59 are formed so as to face the radially outward Dr1 perpendicularly to the outer wall surface portion 50, the intermediate wall surface portion 51, and the inner wall surface portion 52, respectively, and are in surface contact with the flat plate surface of the support member 4, and are fixed to the support member 4 by any fixing method as described above. The mounting portions 57-59 may be integrally formed with the pressure-receiving wall surface portions 50-52, for example, by bending, or may be formed as separate parts from the pressure-receiving wall surface portions 50-52. The outer mounting portion 57 may be formed so as to face the radially inward Dr2 perpendicularly to the outer wall surface portion 50. In this embodiment, the pressure-receiving member 5 is such that the outer mounting portion 57 is formed as a separate part from the outer wall surface portion 50, and the intermediate mounting portion 58 and the inner mounting portion 59 are formed integrally with the intermediate mounting portion 58 and the inner mounting portion 59.

[0035] Each of the plurality of flap members 6 has a flap wall portion 60 extending between a base end 61 disposed closer to the inner end 54 relative to the pressure-receiving wall portions 50-52 and a tip end 62 disposed on the radially outer side Dr1 relative to the pressure-receiving wall portions 50-52 in a plan view perpendicular to the axial direction Da (see FIG. 4). The flap member 6 is connected to the pressure-receiving member 5 via the flap opening / closing mechanism 7 so as to be movable between a closed position P1 where the flap wall portion 60 is disposed along the pressure-receiving wall portions 50-52 and an open position P2 where the flap wall portion 60 forms a predetermined angle θ1 with respect to the pressure-receiving wall portions 50-52 (inner wall portion 52 in this embodiment). FIGS. 2 and 4 show the flap member 6 when disposed in the closed position P1, and FIGS. 3 and 5 show the flap member 6 when disposed in the open position P2.

[0036] In this embodiment, the flap wall portion 60 is formed in a planar shape, similar to the inner wall portion 52, and is disposed along the inner wall portion 52 when disposed at the closed position P1. The base end 61 of the flap member 6 is connected to the inner end 54 via the flap opening / closing mechanism 7, and is rotated about the base end 61 as the rotation center axis O2. At that time, the length of the flap member 6 in the axial direction Da is set shorter than the length of the inner wall portion 52 in the axial direction Da, as shown in FIG. 2. The width of the flap member 6 in plan view is set shorter than the width of the inner wall portion 52 in plan view, as shown in FIG. 4.

[0037] The angle θ1 between the flap member 6 and the pressure-receiving wall surface portions 50-52 (inner wall surface portion 52 in this embodiment) when placed in the open position P2 is preferably in the range of 40 degrees to 120 degrees, and more preferably in the range of 80 degrees to 100 degrees. In this embodiment, the open position P2 of the flap member 6 is set at a position where the angle θ1 becomes a right angle.

[0038] The flap opening / closing mechanism 7 is a connecting mechanism for movably connecting the flap member 6 to the pressure-receiving member 5. The flap opening / closing mechanism 7 is, for example, configured with a hinge mechanism 70 attached to the base end 61 of the flap member 6. The hinge mechanism 70 rotates the flap member 6 about the base end 61 as a rotation center axis O2, thereby connecting the flap member 6 to the pressure-receiving member 5 so as to be movable between a closed position P1 and an open position P2. In this embodiment, as shown in FIG. 3, three hinge mechanisms 70 are used for one flap member 6. The three hinge mechanisms 70 are arranged at predetermined intervals in the axial direction Da, but the number and arrangement of the hinge mechanisms 70 may be changed as appropriate.

[0039] The flap opening / closing mechanism 7 has a closed position holding mechanism 71 that holds the flap wall portion 60 in the closed position P1 relative to the pressure-receiving wall portions 50 to 52 (inner wall portion 52 in this embodiment). When the vertical axis drag type wind power generator 1A rotates and a predetermined force (centrifugal force) acts on the flap wall portion 60, the closed position holding mechanism 71 releases the holding state in which the flap wall portion 60 is held in the closed position P1. That is, when the centrifugal force acting on the flap member 6 becomes larger than the holding force with which the closed position holding mechanism 71 holds the flap member 6 in the closed position P1, the holding state of the flap member 6 is released and it becomes possible to move to the open position P2. The flap opening / closing mechanism 7 may include a weight member (weight) near the tip 62 of the flap wall portion 60 in order to adjust the centrifugal force acting on the flap member 6.

[0040] In this embodiment, the closed position holding mechanism 71 is composed of a magnet member that holds the flap wall portion 60 at the closed position P1 with respect to the pressure-receiving wall portions 50-52 (inner wall portion 52 in this embodiment) by the magnetic force of a magnet. When a magnetic material is used for the inner wall portion 52, the magnet member is attached to the flap wall portion 60. When a magnetic material is used for the flap wall portion 60, the magnet member is attached to the inner wall portion 52. When a magnetic material is not used for the inner wall portion 52 and the flap wall portion 60, the magnet member is attached to one of the inner wall portion 52 and the flap wall portion 60, and a magnetic body is attached to the other of the inner wall portion 52 and the flap wall portion 60.

[0041] 3, three magnet members are used for one flap member 6. The three magnet members are arranged on the flap wall portion 60 at predetermined intervals in the axial direction Da, but the number and arrangement of the magnet members may be changed as appropriate. Note that the closed position holding mechanism 71 may be composed of a biasing member (hinge mechanism 70 including a biasing member) that biases the flap member 6 to the closed position P1 instead of or in addition to the magnet member, or may be composed of a connecting member having a predetermined connection strength.

[0042] The flap opening / closing mechanism 7 has an opening position restricting mechanism 72 that restricts the flap wall surface portion 60 from moving beyond the opening position P2. In this embodiment, the opening position restricting mechanism 72 is configured with a stopper member. The opening position restricting mechanism 72 is attached to the support member 4, for example, and is disposed at a position where it contacts the flap member 6 disposed at the opening position P2 as shown in FIG. 5. The opening position restricting mechanism 72 may be configured with a hinge mechanism 70 that restricts the opening / closing angle instead of or in addition to the stopper member, or may be configured with a link mechanism in which a plurality of arms are connected. The opening position restricting mechanism 72 may also be configured by bending the base end 61 of the flap member 6 at a right angle in a plan view. Furthermore, the stopper member may function as an opening position holding mechanism that holds the flap wall surface portion 60 at the opening position P2 with respect to the pressure receiving wall surface portions 50 to 52 (the inner wall surface portion 52 in this embodiment). For example, the open position restriction mechanism 72 formed of a stopper member may be made of a magnet member or a magnetic material so as to function as an open position holding mechanism.

[0043] The flap opening / closing mechanism 7 may include an actuator such as a motor or a cylinder, or a biasing member, and may automatically adjust the position of the flap member 6. In this case, the flap member 6 may be automatically moved from the closed position P1 to the open position P2. After moving to the open position P2, the flap member 6 may be automatically moved to the closed position P1 when a predetermined automatic return condition (such as a decrease in wind speed) is satisfied. The flap opening / closing mechanism 7 may be configured to manually adjust the position of the flap member 6, and may be fixed to either the closed position P1 or the open position P2, or may be fixed to any position between the closed position P1 and the open position P2.

[0044] FIG. 6 is a schematic diagram showing an example of the arrangement and each parameter of the vertical axis drag type wind power generator 1A according to the first embodiment.

[0045] In a plan view perpendicular to the axial direction Da of the support shaft 3, the parameters for specifying the arrangement and shape of each part of the vertical-axis drag type wind power generator 1A are defined as follows.

[0046] D: diameter of the circumscribing circle of the outer end 53 centered on the rotation central axis O1 of the support shaft 3 (outer end diameter), d: diameter of the support shaft 3 (support shaft diameter), R: radius of curvature of the outer wall surface portion 50, s: the shortest distance (first shortest distance) between the intermediate wall surface portion 51 of one pressure-receiving member 5 and the inner end 54 of the other pressure-receiving member 5, t: the shortest distance between the pressure-receiving member 5 and the outer circumferential surface of the support shaft 3 (the second shortest distance), θ2: Angle between the intermediate wall surface portion 51 and the inner wall surface portion 52

[0047] The above parameters correspond to the dimensions of each part, and therefore can take positive values. Note that, when the outer wall surface portion 50 is a curved surface of a circular arc, the radius of curvature R is a parameter corresponding to the radius of curvature of the outer wall surface portion 50. However, when the outer wall surface portion 50 is a polygonal surface, the radius of curvature R may be treated as a parameter corresponding to the radius of curvature of the circumscribed arc of the outer wall surface portion 50.

[0048] FIG. 7 is a graph showing the simulation results of the power coefficient Cp when the angle θ1 of the flap member 6 is changed.

[0049] The power coefficient Cp of the vertical axis drag type wind turbine generator 1A is defined as follows.

[0050] Cp = P / (0.5 × ρ × U 3 ×D) however, P is the output per unit width in the height direction of the vertical axis drag type wind turbine 1A, ρ is the air density, U is the wind speed.

[0051] The tip speed ratio λ of the vertical axis drag type wind power generator 1A is defined as follows.

[0052] λ=V / U Here, V is the rotational speed (circumferential speed) of the outer end 53.

[0053] The graph of the power coefficient Cp shown in FIG. 7 is a result of calculations of the power coefficient Cp by simulation when the peripheral speed ratio λ is 0.8. The simulation was carried out under the following conditions: the ratio (D:d:R) of the outer end diameter D, the support shaft diameter d, and the curvature radius R is: D=1, d / D=0.07, R / D=0.20 The output coefficient Cp was calculated when the angle θ1 of the flap member 6 was changed when the above condition was satisfied. The angle θ1 of the flap member 6 was set to 16 degrees, 27 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, and 120 degrees, respectively.

[0054] In the graph shown in FIG. 7, the horizontal axis represents the rotation angle of the support shaft 3 (ranging from 0 degrees to 180 degrees) and the vertical axis represents the output coefficient Cp. When the output coefficient Cp is a negative value, the pressure-receiving member 5 suppresses the rotation of the support shaft 3 as if applying a brake to the support shaft 3, rather than generating a rotational force for rotating the support shaft 3. Furthermore, the wider the range of the rotation angle of the support shaft 3 when the output coefficient Cp is a negative value, the more reliably the rotation of the support shaft 3 can be suppressed. Therefore, referring to FIG. 7, the angle θ1 of the flap member 6 is preferably in the range of 40 degrees or more and 120 degrees or less, and more preferably in the range of 80 degrees or more and 100 degrees or less.

[0055] In the vertical axis drag type wind power generator 1A having the above-mentioned configuration, when wind from a predetermined direction (windward) is received by the outer wall surface portion 50 of the leeward pressure receiving member 5, a rotational force (drag) of the wind acts on the leeward pressure receiving member 5 to rotate it toward the traveling direction Dt. At this time, the flap member 6 is in a held state held in the closed position P1 by the closed position holding mechanism 71.

[0056] When the wind flows into between the pair of pressure receiving members 5 along the outer wall surface portion 50 of the leeward pressure receiving member 5, the wind passes between the intermediate wall surface portion 51 of the leeward pressure receiving member 5 and the inner wall surface portion 52 of the windward pressure receiving member 5, between the inner boundary portions 56 of the windward and leeward pressure receiving members 5 and the outer circumferential surface of the support shaft 3, between the inner wall surface portion 52 of the leeward pressure receiving member 5 and the intermediate wall surface portion 51 of the windward pressure receiving member 5, and then flows out along the outer wall surface portion 50 of the windward pressure receiving member 5. When the windward pressure receiving member 5 directly receives the wind from upwind, a rotational force is generated that presses the outer wall surface portion 50 and the intermediate wall surface portion 51 of the pressure receiving member 5 in the leeward direction (opposite to the traveling direction). On the other hand, when the wind that flows in between a pair of pressure-receiving members 5 flows out along the outer wall portion 50 of the windward-side pressure-receiving member 5, the wind is received by the outer wall portion 50 of the windward-side pressure-receiving member 5, generating a rotational force that presses the outer wall portion 50 of the pressure-receiving member 5 in the windward direction (the traveling direction side Dt), and therefore part of the rotational force acting in the opposite direction to the traveling direction is offset by the rotational force acting on the traveling direction side Dt.

[0057] In this way, a rotational force acts on the leeward pressure-receiving member 5 to rotate it in the traveling direction Dt, and the rotational force (rotational energy) is transmitted to the support shaft 3 via the support member 4, causing the support shaft 3 to rotate. The pair of pressure-receiving members 5 then repeat a series of operations while alternately switching between the leeward side and the windward side, causing the support shaft 3 to rotate continuously, and the power generating unit 20 connected to the support shaft 3 to perform a power generating operation.

[0058] As the wind speed increases, the rotation speed of the support shaft 3 increases, but when a strong wind (such as a typhoon or a storm) that exceeds a predetermined wind speed is received, the centrifugal force acting on the flap member 6 becomes greater than the holding force that holds the flap member 6 in the closed position P1 by the closed position holding mechanism 71, and the holding state of the flap member 6 is released. As a result, when the flap member 6 moves from the closed position P1 to the open position P2, the generation of a rotational force in the pressure-receiving member 5 is suppressed, so the rotation speed of the support shaft 3 decreases and the rotation of the support shaft 3 can be stopped. Then, the state in which the rotation of the support shaft 3 is stopped, i.e., the feathering state, can be maintained, so that over-rotation of the vertical axis drag type wind power generator 1A can be prevented.

[0059] As described above, according to the vertical axis drag type wind power generator 1A of this embodiment, each of the multiple flap members 6 is connected to the pressure receiving member 5 via the flap opening / closing mechanism 7 so as to be movable between a closed position P1 where the flap members 6 are disposed along the pressure receiving member 5 (inner wall surface portion 52 in this embodiment) and an open position P2 where the flap members 6 form a predetermined angle θ1 with respect to the pressure receiving member 5 (inner wall surface portion 52 in this embodiment). This allows the flap members 6 to move between the closed position P1 and the open position P2 with respect to the pressure receiving member 5. Therefore, the magnitude of the rotational force generated in the pressure receiving member 5 is changed depending on the position of the flap members 6.

[0060] Specifically, when the flap members 6 are in the closed position P1 arranged along the pressure-receiving members 5, the pair of pressure-receiving members 5 receive wind, generating a rotational force in the pressure-receiving members 5 and rotating the support shaft 3, so that the vertical-axis drag wind power generator 1A performs power generation operation. On the other hand, when the flap members 6 are in the open position P2 forming a predetermined angle θ1 with respect to the pressure-receiving members 5, even if the pair of pressure-receiving members 5 receive wind, the generation of a rotational force in the pressure-receiving members 5 is suppressed, so that the vertical-axis drag wind power generator 1A is in a feathering state, and power generation operation by the vertical-axis drag wind power generator 1A is stopped. Therefore, for example, in a strong wind exceeding a predetermined wind speed, the flap members 6 are moved to the open position P2, and function as an aerodynamic brake for the vertical-axis drag wind power generator 1A, and the vertical-axis drag wind power generator 1A can be prevented from over-rotating.

[0061] Second Embodiment Fig. 8 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1B according to the second embodiment. Fig. 9 is a cross-sectional view showing an example of the vertical axis drag type wind power generator 1B when the flap member 6 is arranged in the open position P3.

[0062] The vertical axis drag type wind power generator 1B according to this embodiment differs from the first embodiment in that the open position P3 of the flap member 6 is changed, and other basic configurations are the same as those of the first embodiment. The following mainly describes the features of this embodiment.

[0063] When the flap member 6 is disposed in the open position P3, the open position P3 of the flap member 6 is set at a position on the traveling direction side Dt of the outer end 53 or the outer end 53 of the other pressure receiving member 5 different from the one pressure receiving member 5 to which the flap member 6 is connected. When the flap member 6 is disposed in the open position P3, it is preferable that the flap member 6 is disposed on the traveling direction side Dt with respect to a line connecting the inner end 54 of one pressure receiving member 5 and the outer end 53 of the other pressure receiving member 5 in a plan view. Therefore, it is preferable that the width of the flap member 6 in a plan view is set shorter than the distance between the inner end 54 of one pressure receiving member 5 and the outer end 53 of the other pressure receiving member 5 in a plan view, as shown in FIG. 9. As a result, the flap member 6 enters the outer wall surface portion 50 on the traveling direction side Dt, which suppresses the wind from hitting the flap member 6, and prevents the flap member 6 from returning to the closed position P1.

[0064] The closed position holding mechanism 71 is, for example, made of a magnet member and a magnetic material, and is attached to the flap wall portion 60 and the inner wall portion 52 of the pressure receiving member 5, respectively. The open position regulating mechanism 72 is, for example, made of a magnet member and a magnetic material, and is attached to the flap wall portion 60 and the outer wall portion 50 of the pressure receiving member 5, respectively. In this way, the open position regulating mechanism 72 also functions as the open position holding mechanism. The outer end 53 of the pressure receiving member 5 may be brought into contact with the flap wall portion 60 when the pressure receiving member 5 is placed in the open position P3, thereby functioning as the open position regulating mechanism 72. In addition, two slits are made from the outer end 53 in the outer wall portion 50 of the pressure receiving member 5, and the outer end 53 between the two slits is folded radially inward Dr2 to form a folded portion. The folded portion may be brought into contact with the flap wall portion 60 when the pressure receiving member 5 is placed in the open position P3, thereby functioning as the open position regulating mechanism 72. In this case, the outer edge 53 or the bent portion may function as an open position maintaining mechanism.

[0065] As described above, according to the vertical axis drag type wind power generator 1B of this embodiment, as in the first embodiment, for example, in the event of a strong wind exceeding a predetermined wind speed, the flap member 6 is moved to the open position P3, thereby functioning as an aerodynamic brake for the vertical axis drag type wind power generator 1B and preventing over-rotation of the vertical axis drag type wind power generator 1B.

[0066] (Third embodiment) FIG. 10 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1C according to the third embodiment.

[0067] The vertical axis drag type wind power generator 1C according to this embodiment differs from the first embodiment in that it has a tandem structure by including a plurality of drag type turbine units 10, each of which is made up of a support shaft 3, a plurality of support members 4 (three in this embodiment), and a plurality of pressure-receiving members 5 (four (two pairs) in this embodiment), but the other basic configurations are the same as those of the first embodiment. The following mainly describes the features of this embodiment.

[0068] The support shaft 3 includes a coupling mechanism 31 that detachably couples adjacent support shafts 3 when the support shafts 3 of the drag type turbine units 10 are arranged coaxially. The support member 4 includes a coupling mechanism 42 that detachably couples adjacent support members 4 when the support shafts 3 of the drag type turbine units 10 are arranged coaxially. The coupling mechanism 31 of the support shaft 3 and the coupling mechanism 42 of the support member 4 couple the support shafts 3 or the support members 4 by any coupling method (screw fixing, rivet, pin connection, joint, etc.), and may be, for example, detachable with a tool or detachable with one touch without the need for a tool. One of the coupling mechanism 31 of the support shaft 3 and the coupling mechanism 42 of the support member 4 may be omitted.

[0069] In this embodiment, the vertical-axis drag type wind power generator 1C is described as having two drag type turbine units 10 as shown in FIG. 10, but the number of drag type turbine units 10 may be three or more. When multiple drag type turbine units 10 are connected via at least one of the connection mechanism 31 of the support shaft 3 and the connection mechanism 42 of the support member 4, the pressure-receiving members 5 of each of the multiple drag type turbine units 10 may be arranged in the same direction as shown in FIG. 10, or in different directions. In this case, for example, they may be shifted by 90 degrees or may be shifted in a spiral shape. The number of support members 4 and pressure-receiving members 5 constituting the drag type turbine unit 10 may be changed as appropriate. For example, the drag type turbine unit 10 may be configured with two support members 4 and two (a pair) pressure-receiving members 5. Furthermore, multiple types of drag type turbine units 10 in which the number of at least one of the support members 4 and the pressure-receiving members 5 is different may be connected.

[0070] As described above, according to the vertical axis drag type wind generator 1C of this embodiment, a single vertical axis drag type wind generator 1C is formed by connecting multiple drag type turbine units 10, so that the power generation output of the vertical axis drag type wind generator 1C can be changed depending on the number of drag type turbine units 10.

[0071] (Other embodiments) As described above, the embodiment of the present invention has been described, but the present invention is not limited to the above embodiment, and can be modified as appropriate without departing from the technical concept of the present invention.

[0072] In the above embodiment, the case where three or four support members 4 are provided as the multiple support members 4 has been described, but the number of support members 4 may be two, or five or more.

[0073] In the above embodiment, the pressure-receiving member 5 rotates clockwise around the central rotation axis O1, but it may also rotate counterclockwise, in which case the shapes of the support member 4 and the pressure-receiving member 5 can be inverted.

[0074] In the above embodiment, a case has been described in which a pair (two) of pressure-receiving members 5 are provided as the multiple pressure-receiving members 5, but the number of pressure-receiving members 5 may be three or more, in which case, they should be arranged at equal intervals around the support shaft 3 and symmetrically with respect to the support shaft 3.

[0075] In the above embodiment, the multiple pressure-receiving members 5 have been described as having shapes as shown in Fig. 2, Fig. 4, etc., but the shape of the pressure-receiving members 5 may be changed as appropriate. For example, the shape of the pressure-receiving members 5 may be a C-shaped (arc-shaped) cross section as used in Savonius wind turbines, or a J-shaped cross section as used in Bach wind turbines. In that case, the shape of the flap members 6 may also be changed as appropriate.

[0076] In the above embodiment, the support member 4 is described as being made of, for example, a flat plate material, but the support member 4 may have a through hole of any shape that passes through a portion of the support member 4. The number of through holes may be multiple, and in that case, they may be arranged symmetrically with respect to the support shaft 3. This reduces the weight of the device and reduces the amount of snow that accumulates on the support member 4, thereby preventing damage caused by snow accumulation.

[0077] In the above embodiment, the support axis 3 (rotation center axis O1) is described as being arranged perpendicular (vertical) to the installation surface, i.e., arranged parallel to the vertical direction, but it may be arranged diagonally to the vertical direction, or perpendicular to the vertical direction, i.e., horizontally.

[0078] In the above embodiment, the flap member 6 is connected to each of the multiple pressure receiving members 5. However, the flap member 6 may be connected to only some of the multiple pressure receiving members 5 included in the vertical axis drag type wind power generators 1A to 1C. For example, in the vertical axis drag type wind power generators 1A and 1B according to the first or second embodiment, the pressure receiving members 5 are arranged in three stages, but the flap member 6 may be connected to the first stage pressure receiving member 5 from the bottom and the third stage pressure receiving member 5 from the bottom. In addition, in the vertical axis drag type wind power generator 1C according to the third embodiment, multiple drag type turbine units 10 are connected, but the flap member 6 may be connected to only the pressure receiving members 5 included in some of the drag type turbine units 10.

[0079] In the above embodiment, the vertical axis drag type wind generators 1A to 1C using a drag type turbine device have been described as one application example of a drag type turbine device. However, instead of connecting the support shaft 3 to the power generation unit 20, the support shaft 3 may be connected to a rotating machine such as a pump to form a wind power rotating device using a drag type turbine device.

[0080] In the above embodiment, the vertical axis drag type wind generators 1A to 1C using a drag type turbine device have been described as one application example of a drag type turbine device. However, instead of using wind (air flow) as the energy source, a water flow, wave, tidal current, etc. may be used to make a hydroelectric generator or a tidal power generator using a drag type turbine device. Furthermore, instead of connecting the support shaft 3 to the power generation unit 20, the support shaft 3 may be connected to a rotating machine such as a pump to make a hydroelectric rotating device or a tidal power rotating device using a drag type turbine device. [Explanation of symbols]

[0081] 1A to 1C: vertical axis drag type wind turbine generator (drag type turbine device), 2: support housing, 3...support shaft, 4...support member, 5...pressure-receiving member, 6...flap member, 7...flap opening / closing mechanism, 10...drag type turbine unit, 20...power generation unit, 30: connecting and fixing member, 31: connecting mechanism portion, 40...Curved external part, 41...Straight external part, 42...Connection mechanism part, 50~52...Pressure receiving wall part, 50...Outer wall part, 51...Intermediate wall part, 52...Inner wall part, 53...outer end, 54...inner end, 55...outer boundary, 56...inner boundary, 57: outer mounting portion, 58: intermediate mounting portion, 59: inner mounting portion, 60: flap wall portion, 61: base end, 62: tip end, 70: hinge mechanism, 71: closed position holding mechanism, 72: open position restricting mechanism

Claims

1. A support shaft that is rotatably supported; A plurality of support members are arranged at predetermined intervals in the axial direction of the support shaft, at least one of which is fixed to the support shaft; a plurality of pressure-receiving members that are disposed symmetrically with respect to the central axis of rotation of the support shaft between adjacent support members and supported by the support members; a plurality of flap members respectively connected to the plurality of pressure-receiving members via flap opening / closing mechanisms; Each of the plurality of pressure-receiving members includes a pressure-receiving wall portion extending between an outer end and an inner end disposed radially inward of the outer end on the opposite side of the outer end with respect to the rotation central axis in a plan view perpendicular to the axial direction, Each of the plurality of flap members includes: a flap wall portion extending between a base end disposed near the inner end with respect to the pressure-receiving wall portion in the plan view and a tip end disposed radially outward with respect to the pressure-receiving wall portion, and the flap wall portion is connected to the pressure-receiving member via the flap opening / closing mechanism so as to be movable between a closed position in which the flap wall portion is disposed along the pressure-receiving wall portion and an open position in which the flap wall portion forms a predetermined angle with respect to the pressure-receiving wall portion; Drag type turbine device.

2. Each of the plurality of flap members includes: The base end is connected to the inner end via the flap opening / closing mechanism and is rotated around the base end as a rotation center axis.

2. The drag turbine arrangement of claim 1.

3. The flap opening and closing mechanism includes: Consists of a hinge mechanism.

3. A drag type turbine arrangement as claimed in claim 2.

4. The angle is The range is 40 degrees or more and 120 degrees or less.

2. The drag turbine arrangement of claim 1.

5. The flap opening and closing mechanism includes: a closed position holding mechanism that holds the flap wall portion in the closed position relative to the pressure-receiving wall portion; 2. The drag turbine arrangement of claim 1.

6. The closed position retention mechanism includes: When a predetermined force is applied to the flap wall portion, the flap wall portion is released from the held state in the closed position.

6. A drag type turbine arrangement as claimed in claim 5.

7. The closed position retention mechanism includes: a magnet member that holds the flap wall portion in the closed position with respect to the pressure-receiving wall portion by magnetic force; 7. A drag type turbine arrangement as claimed in claim 6.

8. The flap opening and closing mechanism includes: an open position restriction mechanism that restricts the flap wall portion from moving beyond the open position; 2. The drag turbine arrangement of claim 1.

9. Each of the plurality of pressure-receiving members includes an inner wall surface portion formed in a flat shape as a part of the pressure-receiving wall surface portion disposed near the inner end, Each of the plurality of flap members includes: The flap wall portion is formed in a flat shape, and is connected to the pressure-receiving member via the flap opening / closing mechanism so as to be movable between the closed position in which the flap wall portion is disposed along the inner wall portion and the open position in which the flap wall portion forms the angle with respect to the inner wall portion.

2. The drag turbine arrangement of claim 1.

10. a plurality of the drag type turbine units, each of the support shaft, the plurality of the support members, and the plurality of the pressure-receiving members being defined as one drag type turbine unit; At least one of the support member and the support shaft is a coupling mechanism that detachably couples at least one of the support members and the support shafts that are adjacent to each other when the support shafts of each of the drag type turbine units are coaxially arranged, 2. The drag turbine arrangement of claim 1.

11. A drag type turbine device according to any one of claims 1 to 10, Wind, water or tidal rotating devices.

12. A drag type turbine device according to any one of claims 1 to 10, Wind, hydro or tidal generators.

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