Drag type turbine device, wind power rotary device, hydraulic rotary device, and tidal rotary device including drag type turbine device, and wind power generator, hydraulic power generator, and tidal power generator including drag type turbine device

Abstract

To provide a drag type turbine device which suppresses deterioration of device performance, and easily secures device strength.SOLUTION: A drag type turbine device 1A includes a support shaft 3, a plurality of support members 4 arranged to be separated apart from each other by a predetermined distance in an axial direction of the support shaft 3 and fixed to the support shaft 3, and a plurality of pressure receiving members 5 arranged between the adjacent support members 4 in one pair symmetrical with respect to a rotation center axis O1 of the support shaft 3 and supported by the support members 4. The pressure receiving member 5 has an outer wall face part 50 formed in a curved surface shape, and one or more inner wall face parts 51, 52 formed in a curved surface shape or planar surface shape. The support member 4 has a curved profile part 40 which is formed in a curve line along the outer wall face part 50 as shape in a plan view, and has the amount of a longitudinal protrusion protruding from the outer wall face part 50 in a radial outer direction so as to be set to become larger farther away from an outer end 53, and a linear outer shape part 41 formed linearly along the inner wall face parts 51, 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 some time. For example, as a drag-type wind power generator, Patent Document 1 discloses a Savonius-type wind turbine having multiple blades with a C-shaped (arc-shaped) cross section. Patent Document 2 discloses a Bach-type wind turbine having multiple blades with a J-shaped cross section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-183640 A [Patent Document 2] Japanese Patent Application Publication No. 6-323237 Summary of the Invention [Problem to be solved by the invention]

[0004] In the drag type wind power generators disclosed in Patent Document 1 and Patent Document 2, the support member (the wind turbine rotor in Patent Document 1, the end plate in Patent Document 2) that supports the pressure-receiving member is formed in a disk shape, that is, in a circular shape in a plan view of the support member. It is known that the presence of the support member at the end of the pressure-receiving member generates lift up to the end (blade tip) of the pressure-receiving member when the pressure-receiving member rotates, and the generation of vortexes at the end of the pressure-receiving member is suppressed, thereby improving the performance of the device.

[0005] However, the support member formed in a disk shape has a large protruding amount and area of ​​the part protruding from the pressure-receiving member, and the overhang from the pressure-receiving member becomes large. Therefore, the fluid resistance and moment of inertia of the support member 4 increase depending on the overhang from the pressure-receiving member, which can be a factor in reducing the performance of the device, and measures to ensure the strength of the device are required.

[0006] Therefore, an object of the present invention is to provide a resistance type turbine device that can easily ensure device strength while suppressing a decrease in device performance, a wind rotation device, a hydrodynamic rotation device, and a tidal rotation device that use the resistance type turbine device, as well as a wind turbine generator, a hydrodynamic generator, and a tidal generator that use the resistance type turbine device. [Means for solving the problem]

[0007] 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 pair of pressure-receiving members symmetrically disposed with respect to the rotational center axis of the support shaft between adjacent support members and supported by the support members; Each of the plurality of pressure-receiving members includes As a wall surface portion extending between an outer end and an inner end disposed on the opposite side of the outer end with respect to the rotation central axis and radially inward of the support shaft than the outer end in a plan view perpendicular to the axial direction, an outer wall surface portion that is formed in a curved shape and bulges outward in the radial direction, the outer wall surface portion being extended between the outer end and an outer boundary portion that is disposed on the side in the direction of travel when the pressure-receiving member receives fluid pressure relative to the outer end and the support shaft rotates and is closer to the rotation central axis; one or more inner wall surface portions extending between the outer boundary portion and the inner end disposed on the traveling direction side of the outer boundary portion and formed in a curved or flat shape bulging outward in the radial direction, Each of the plurality of support members has a shape in the plan view of: a pair of curved outer shaped portions that are curved along the outer wall surface portions on the longitudinal outer sides of the pair of pressure-receiving members, and that protrude radially outward from the outer wall surface portions to a greater extent as the curved outer shaped portions move away from the outer ends; The pressure-receiving members each have a pair of straight line contour portions formed in a straight line along the inner wall portion so as to connect the pair of curved line contour portions to each other on the outer side in the short direction of the pair of pressure-receiving members, and each straight line contour portion protrudes outward in the short direction from the inner wall portion.

[0008] 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

[0009] According to the drag type turbine device according to an embodiment of the present invention, the curved outer shape of the support member is formed in a curved shape along the outer wall surface portion with respect to the longitudinal outside of the pressure-receiving member in a plan view, and the amount of protrusion from the outer wall surface portion in the radial direction outward from the outer end is set to be larger as it moves away from the outer end. In the support member, the vector of the lift force generated near the outer end is a component in the longitudinal direction of the support member, so even if the amount of protrusion near the outer end is increased, the effect on the increase of the rotational force for rotating the rotating shaft is small. On the other hand, if the amount of protrusion near the outer end is increased, the fluid resistance and moment of inertia of the support member increase, and the device performance is reduced. Therefore, by setting the amount of protrusion of the curved outer shape portion to be larger as it moves away from the outer end, the amount of protrusion of the curved outer shape portion can be secured while reducing the amount of protrusion near the outer end, and thus the deterioration of the device performance can be suppressed.

[0010] In addition, the linear outer shape portion of the support member is formed in a straight line along the inner wall surface portion with respect to the outside of the short side direction of the pressure-receiving member so as to connect the curved outer shape portions with each other, and protrudes outward in the short side direction from the inner wall surface portion. As a result, the protrusion amount of the linear outer shape portion is smaller than when the shape of the support member in a plan view is formed in a circular shape, and therefore the overhang from the inner wall surface portion is reduced, making it easy to ensure the strength of the device. [Brief description of the drawings]

[0011] [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. 1 is a partially exploded perspective view showing an example of a vertical axis resistance type wind power generator 1A according to a first embodiment. [Diagram 3] FIG. 1 is a cross-sectional view showing an example of a vertical axis resistance type wind power generator 1A according to a first embodiment. [Figure 4] 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. [Diagram 5] 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 6] 11 is a graph showing simulation results of the output coefficient Cp when a reference value P1 of the longitudinal protrusion amount of the curved outer portion 40 is changed. [Figure 7] 13 is a graph showing a simulation result of the output coefficient Cp when a reference value P2 of the amount of protrusion in the short side direction of a straight outline portion 41 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. 11 is a cross-sectional view showing an example of a vertical axis resistance type wind power generator 1B according to a second embodiment. [Figure 10] FIG. 11 is a schematic diagram showing an example of the arrangement and each parameter of a vertical axis drag type wind power generator 1B according to a second embodiment. [Figure 11]FIG. 11 is a schematic diagram showing an example of the arrangement and each parameter of a vertical axis drag type wind power generator 1B according to a second embodiment. [Figure 12] 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. [Figure 13] FIG. 11 is a cross-sectional view showing an example of a vertical axis resistance type wind power generator 1C according to a third embodiment. [Figure 14] 13 is a graph showing a comparison of simulation results of the output coefficient Cp depending on whether or not the shape of the support member 4 is changed and whether or not the auxiliary support member 6 is present. [Figure 15] FIG. 11 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1D according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Specific embodiments of the present invention are 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 1D) 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 a completely parallel case, but also a substantially parallel case in which a deviation is allowed to a degree that does not impair the function of the vertical axis drag type wind power generator 1. Similarly, "vertical" includes not only a completely vertical case, but also a substantially vertical case in which a deviation is allowed to a degree that does not impair the function of the vertical axis drag type wind power generator 1. In addition, in the description of the embodiments, "arc" includes not only a completely circular arc, but also a substantially arc in which a deviation is allowed to a degree that does not impair the function of the vertical axis drag type wind power generator 1.

[0013] (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 a vertical axis drag type wind power generator 1A according to the first embodiment. Fig. 3 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1A according to the first embodiment.

[0014] 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, and a plurality of pressure-receiving members 5 arranged between the plurality of support members 4 and supported by the plurality of support members 4. The vertical-axis drag type wind power generator 1A functions as a drag type wind turbine, in which the support shaft 3 rotates in the traveling direction Dt (clockwise in this embodiment (see FIG. 3)) when the pressure-receiving member 5 receives wind pressure (fluid pressure) due to wind (air flow) flowing from a predetermined direction.

[0015] 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) 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.

[0016] In this embodiment, as shown in Fig. 1, the vertical axis drag type wind power generator 1A includes three 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 the three support members 4, i.e., between adjacent support members 4. That is, the vertical axis drag type wind power generator 1A includes four pressure receiving members 5 in total.

[0017] 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. 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.

[0018] 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.

[0019] 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. The support shaft 3 may be composed of a single shaft member, or may be composed of multiple (in this embodiment, two) connected shaft members having a length approximately equal to the interval L1.

[0020] 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 (not shown) formed, for example, in a ring shape or flange shape. The support members 4 are also fixed to the pressure-receiving member 5 by any fixing method as described above, and support the pressure-receiving member 5.

[0021] 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 third support members 4 from the bottom in the example of FIG. 1) may be fixed to the support shaft 3 via a connecting and fixing member. In this case, a part or all of the intermediate support members 4 arranged between the both ends (the second support member 4 from the bottom in the example of FIG. 1) may be fixed to the support shaft 3 via a connecting and fixing member, 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.

[0022] The support member 4 has, as a shape (plan view shape) in a plan view (see FIG. 3) 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 each 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 inner wall surface portions 51, 52 (details will be described later) of each 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 that connect both ends of the two linear portions in a curved shape.

[0023] The longitudinal direction of the pair of pressure-receiving members 5 is defined as a direction parallel to the straight line formed by the linear outer portion 41 in a plan view. The lateral direction of the pair of pressure-receiving members 5 is defined as a direction perpendicular to the straight line formed by the linear outer portion 41 in a plan view.

[0024] The curved contour portions 40 are disposed on the longitudinal outer sides Dl of the pair of pressure-receiving members 5, respectively, in plan view. The curved contour portions 40 protrude from the outer wall surface portions 50 to the radial outer sides Dr1 of the support shaft 3, in plan view.

[0025] In plan view, the linear contour portions 41 are disposed on respective lateral outer sides Ds in the short side direction of the pair of pressure-receiving members 5. In plan view, the linear contour portions 41 protrude from the inner wall surface portions 51, 52 to the lateral outer sides Ds.

[0026] 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. 3), the pressure-receiving member 5 has wall surfaces 50-52 extending between an outer end 53 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 from the outer end 53.

[0027] The pressure-receiving member 5 has, as the wall surface portions 50-52, an outer wall surface portion 50 extending between an outer end 53 and an outer boundary portion 55 and formed in a curved shape bulging outward in the radial direction Dr1, and one or more inner wall surface portions 51, 52 extending between the outer boundary portion 55 and an inner end 54 and formed in a curved or flat shape bulging outward in the radial direction Dr1. In this case, the outer boundary portion 55 is disposed on the traveling direction side Dt of the pressure-receiving member 5 and closer to the rotation central axis O1 than the outer end 53. Also, the inner end 54 is disposed on the traveling direction side Dt of the pressure-receiving member 5 than the outer boundary portion 55.

[0028] In this embodiment, the pressure-receiving member 5 has, as the wall surface portions 50 to 52, an outer wall surface portion 50 disposed near the outer end 53, a second inner wall surface portion 52 disposed near the inner end 54, and a first inner wall surface portion 51 disposed between the outer wall surface portion 50 and the second inner wall surface portion 52. The pressure-receiving member 5 also has an outer boundary portion 55 disposed at the boundary portion between the outer wall surface portion 50 and the first inner wall surface portion 51, and an inner boundary portion 56 disposed at the boundary portion between the first inner wall surface portion 51 and the second inner wall surface portion 52. In this case, the inner boundary portion 56 is disposed on the traveling direction side Dt of the pressure-receiving member 5 and near the rotation central axis O1 with respect to the outer boundary portion 55.

[0029] The outer wall surface portion 50 is an outer wall surface portion that is extended between the outer end 53 and the outer boundary portion 55 and formed into a curved shape that bulges outward in the radial direction Dr1. The outer wall surface portion 50 is curved so as not to impede the flow of air, and is, for example, a curved shape in a plan view that is an arc, an elliptical arc, or another curve. In this embodiment, the outer wall surface portion 50 is formed into a curved shape of an arc having a single curvature. When the outer wall surface portion 50 is curved into an arc, the central angle of the arc is, for example, preferably in the range of 75 degrees to 135 degrees, and more preferably in the range of 90 degrees to 120 degrees.

[0030] The first inner wall surface portion 51 is an inner wall surface portion that is extended between the outer boundary portion 55 and the inner boundary portion 56 and is formed in a curved or flat shape that bulges outward in the radial direction Dr1. The first inner wall surface portion 51 is formed in an arbitrary curved shape, for example, a curved shape, such as a circular arc, an elliptical arc, or other curved line, as a curved surface. The first inner wall surface portion 51 is formed in a flat shape that is a straight line as shown in FIG. 3. When the planar shape of the outer wall surface portion 50 is a curved arc, the first inner wall surface portion 51 may be a flat shape that is arranged on a tangent extended from the end 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 arc or elliptical arc) and the first inner wall surface portion 51 (tangent to the circular arc or elliptical arc). This allows the flow of air from the outer wall surface portion 50 toward the first inner wall surface portion 51 to be smooth.

[0031] The second inner wall surface portion 52 is an inner wall surface portion that extends between the inner boundary portion 56 and the inner end 54 and is formed in a curved or flat shape that bulges outward in the radial direction Dr1. The second inner wall surface portion 52 is formed in a curved shape, for example, a curved shape that has a circular arc, an elliptical arc, or other curved line in a planar view. The second inner wall surface portion 52 is also formed in a flat shape that has a straight line in a planar view, as shown in FIG.

[0032] In this embodiment, the first inner wall surface portion 51 and the second inner wall surface portion 52 are formed on a straight plane in plan view, and the inner end 54 is disposed on the traveling direction side Dt with respect to the extension line of the first inner wall surface portion 51 in plan view. As a result, the first inner wall surface portion 51 and the second 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 first inner wall surface portion 51 may also be disposed so as to be convex toward the radially outer side Dr1 via the outer boundary portion 55 in plan view, so that the outer wall surface portion 50 and the first inner wall surface portion 51 form an obtuse angle on the support shaft 3 side.

[0033] 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 first inner wall surface 51, and when the inner boundary 56 is curved, it may be formed in the same curved shape as the first inner wall surface 51.

[0034] The wall surface portions 50 to 52 may be formed integrally with each other by a part or the whole of adjacent portions among the respective portions (the outer wall surface portion 50, the outer boundary portion 55, the first inner wall surface portion 51, the inner boundary portion 56, and the second inner wall surface portion 52), or may be formed by joining a plurality of parts. For example, when the entire wall surface portions 50 to 52 (the outer wall surface portion 50, the outer boundary portion 55, the first inner wall surface portion 51, the inner boundary portion 56, and the second inner wall surface portion 52) are formed integrally, the pressure-receiving member 5 may be manufactured by bending a flat metal plate or a resin plate or the like in an area corresponding to each portion. This eliminates seams and fasteners in the wall surface portions 50 to 52, so that the fluid resistance of the pressure-receiving member 5 can be reduced. In this embodiment, the pressure-receiving member 5 is formed integrally with the entire wall surface portions 50 to 52, as shown in FIG. 3.

[0035] Furthermore, when the wall surface portions 50 to 52 are formed as separate parts, they may be configured as three parts divided at the outer boundary portion 55 and the inner boundary portion 56, or may be configured as two parts divided near the middle of the first inner wall surface portion 51. The pressure-receiving member 5 may be manufactured by fixing each part via a fixing portion using any fixing method as described above.

[0036] The pair of pressure receiving members 5 are symmetrically arranged around the support shaft 3, shifted by 180 degrees, while being spaced apart in the radial directions Dr1 and Dr2 of the support shaft 3. Therefore, the first inner wall surface portion 51 of one pressure receiving member 5 and the second inner wall surface portion 52 of the other pressure receiving member 5 are arranged at positions facing each other, and a gap is formed between the inner boundary portion 56 of the pressure receiving member 5 and the outer circumferential surface of the support shaft 3. At this time, the first inner wall surface portion 51 and the second inner wall surface portion 52 of the pressure receiving member 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.

[0037] 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 central axis O1 of rotation 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. This allows the width of the passage formed between the pair of pressure-receiving members 5 to be appropriately set.

[0038] 4 and 5 are schematic diagrams showing an example of the arrangement and each parameter of the vertical axis drag type wind power generator 1A according to the first embodiment. Note that the support shaft 3 is not shown in FIG.

[0039] In a plan view perpendicular to the axial direction Da of the support shaft 3, parameters for specifying the arrangement and shape of each part of the vertical-axis drag type wind power generator 1A are defined as follows. Note that each parameter corresponds to the size of each part, and therefore can take a positive value.

[0040] D: diameter of the circumscribing circle of the outer end 53 centered on the rotation central axis O1 (outer end diameter), d: diameter of the support shaft 3 (support shaft diameter), R1: radius of the circumscribing circle of the outer end 53 centered on the rotation axis O1 (=D / 2), R2: Radius of the circumscribed circle of the curved outer portion 40 centered on the rotation axis O1 R3: radius of curvature of the outer wall surface portion 50, R4: radius of curvature of the curved outer portion 40, s: the shortest distance (first shortest distance) between the first inner 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), θ: Angle between the first inner wall surface portion 51 and the second inner wall surface portion 52 Px: Length of protrusion of the curved outer portion 40 from the outer wall portion 50 (variable) Py: Amount of protrusion of the linear outer portion 41 from the inner wall surface portions 51 and 52 in the short side direction (variable) P1: Protrusion amount from the outer end 53 to the curved outer portion 40 (reference value of the longitudinal protrusion amount) P2: Protrusion amount from the outer end 53 to the virtual arc 42 (reference value of the protrusion amount in the short side direction) P3: Amount of protrusion of the linear outer portion 41 from the inner end 54 in the short direction P4: Amount of protrusion of the linear outer portion 41 from the inner boundary portion 56 in the short side direction

[0041] The curved outer portion 40 is formed into a curved surface shape that is an arc having a single radius of curvature R4 in a plan view. The radius of curvature R4 of the curved outer portion 40 is set to be smaller than the radius R1 of the circumscribing circle of the outer end 53. In this case, it is preferable that the radius of curvature R4 of the curved outer portion 40 is set to be larger than the radius of curvature R3 of the outer wall portion 50.

[0042] The longitudinal protrusion amount Px of the curved outer portion 40 protruding radially outward Dr1 from the outer wall surface portion 50 is set to increase as the curved outer portion 40 moves away from the outer end 53 of the pressure-receiving member 5. That is, the protrusion amount P1 when the curved outer portion 40 protrudes radially outward Dr1 from the outer end 53 is minimum, and the longitudinal protrusion amount Px of the curved outer portion 40 is set to increase as the curved outer portion 40 moves away from the outer end 53. The protrusion amount P1 from the outer end 53 to the curved outer portion 40 is defined as the reference longitudinal protrusion amount P1.

[0043] The straight line outer shape portion 41 is formed on a tangent to an imaginary arc 42 that is set concentrically with the outer wall surface portion 50. The tangent to the imaginary arc 42 is drawn so as to intersect with the curved line outer shape portion 40 in the vicinity of the outer end 53. The straight line outer shape portion 41 and the curved line outer shape portion 40 are preferably connected in a smooth curved shape in a plan view, and may be connected in an arc shape having a radius of curvature that is set smaller than the radius of curvature R3 of the outer wall surface portion 50, for example.

[0044] The amount of lateral protrusion Py of the straight line outer shape portion 41 protruding outward in the lateral direction Ds from the inner wall surface portions 51, 52 is set to be larger the further it is from the inner boundary portion 56 and the closer it is to the inner end 54. In other words, the amount of lateral protrusion P4 of the straight line outer shape portion 41 protruding outward in the lateral direction Ds from the inner boundary portion 56 is set to be smaller than the amount of lateral protrusion P3 of the straight line outer shape portion 41 protruding outward in the lateral direction from the inner end 54. When the straight line outer shape portion 41 is formed on a tangent to a virtual arc 42 set concentrically with the outer wall surface portion 50, the amount of protrusion P2 from the outer end 53 to the virtual arc 42 is defined as the reference value P2 of the amount of lateral protrusion.

[0045] Fig. 6 is a graph showing the simulation results of the output coefficient Cp when the reference value P1 of the longitudinal protrusion amount of the curved outer portion 40 is changed. Fig. 7 is a graph showing the simulation results of the output coefficient Cp when the reference value P2 of the lateral protrusion amount of the straight outer portion 41 is changed.

[0046] The power coefficient Cp of the vertical axis drag type wind turbine generator 1A is defined as follows.

[0047] 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.

[0048] The tip speed ratio λ of the vertical axis drag type wind power generator 1A is defined as follows.

[0049] λ=V / U Here, V is the rotational speed (circumferential speed) of the outer end 53.

[0050] The graphs of the power coefficient Cp shown in Figures 6 and 7 are the power coefficients Cp calculated by simulation when the peripheral speed ratio λ is 0.6. The simulation was performed under the following conditions: the ratio (D:d:R3) of the outer end diameter D, the support shaft diameter d, and the curvature radius R3 is: D=1, d / D=0.07, R / D=0.20 When the above condition is satisfied, the output coefficient Cp is calculated by varying the reference values ​​P1 and P2.

[0051] 6, the horizontal axis represents the ratio of the reference value P1 of the longitudinal protrusion amount to the outer end diameter D, and the vertical axis represents the output coefficient Cp. Models M1 to M3 have the ratio of the reference value P2 of the lateral protrusion amount to the outer end diameter D set to "14%, " "20%, and "30%, respectively.

[0052] 6, it was found that the reference value P1 of the longitudinal protrusion amount of the curved outer portion 40 protruding radially outward Dr1 from the outer end 53 reduces the power coefficient Cp when the ratio of the reference value P1 of the longitudinal protrusion amount to the outer end diameter D exceeds 5%, even if there is a difference in the reference value P2 of the transverse protrusion amount. Also, when this ratio is less than 3%, the power coefficient Cp may reduce. Therefore, it is preferable that the ratio of the reference value P1 of the longitudinal protrusion amount to the outer end diameter D is set to be 3% or more and 5% or less.

[0053] 7, the horizontal axis represents the ratio of the reference value P2 of the lateral protrusion amount to the outer end diameter D, and the vertical axis represents the output coefficient Cp. Models M4 to M6 have the ratio of the reference value P1 of the longitudinal protrusion amount to the outer end diameter D set to "0", "3%", and "5%, respectively.

[0054] 7, it was found that the standard value P2 of the lateral protrusion amount of the straight outer portion 41 protruding outward in the lateral direction Ds from the inner wall surface portions 51, 52 has a high rate of increase (slope) of the power coefficient Cp up to a ratio of about 15% of the standard value P2 of the lateral protrusion amount to the outer end diameter D, even if there is a difference in the standard value P1 of the longitudinal protrusion amount, and that the power coefficient Cp increases further even if the ratio exceeds 15%. Therefore, it is preferable that the ratio of the standard value P2 of the lateral protrusion amount to the outer end diameter D is set to 10% or more and 20% or less.

[0055] In the vertical axis drag type wind generator 1A having the above-mentioned configuration, when wind from a predetermined direction (upwind) is received by the outer wall portion 50 of the downwind side pressure-receiving member 5, a rotational force (drag) acts on the downwind side pressure-receiving member 5 so as to rotate it in the direction of travel Dt.

[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 first inner wall surface portion 51 of the leeward pressure receiving member 5 and the second 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 second inner wall surface portion 52 of the leeward pressure receiving member 5 and the first inner 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 first inner 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] It is also known that when the azimuth angle of the vertical axis drag type wind power generator 1A satisfies a specific range, lift (negative pressure) is generated mainly on the outer wall surface portion 50 and the first inner wall surface portion 51 of the pressure receiving member 5, and contributes to a rotational force that presses the pressure receiving member 5 toward the traveling direction side Dt. At that time, the support member 4 protrudes toward the radial outside Dr1 or the short side outside Ds with respect to the wall surface portions 50 to 52 of the pressure receiving member 5, so that lift is generated up to the end portion (wing tip) of the pressure receiving member 5 in the axial direction Da, and the generation of a vortex at the end portion of the pressure receiving member 5 in the axial direction Da can be suppressed. This can further increase the rotational force that presses the pressure receiving member 5 toward the traveling direction side Dt.

[0058] 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.

[0059] As described above, in the vertical axis drag type wind power generator 1A according to this embodiment, the support member 4 protrudes radially outward Dr1 or short-side outward Ds from the wall surface parts 50-52 of the pressure-receiving member 5, so that lift is generated up to the end (wing tip) of the pressure-receiving member 5 in the axial direction Da, and vortex generation at the end of the pressure-receiving member 5 in the axial direction Da is suppressed. As a result, the pressure-receiving member 5 is pressed toward the traveling direction side Dt with a stronger force, so that the rotational force for rotating the support shaft 3 increases, and the device performance can be improved. The effect of improving the device performance can also be understood from FIG. 14 described later.

[0060] The curved outer shape portion 40 of the support member 4 is formed in a curved shape along the outer wall surface portion 50 with respect to the longitudinal outside Dl of the pressure-receiving member 5 in a plan view, and the protruding amount Px protruding from the outer wall surface portion 50 to the radial outside Dr1 is set to be larger as it moves away from the outer end 53. The vector of the lift force generated on the outer wall surface portion 50 and the first inner wall surface portion 51 is generated so as to be perpendicular to the outer wall surface portion 50 and the first inner wall surface portion 51, but near the outer end 53, it is generated toward the radial outside Dr1. Therefore, even if the protruding amount P1 near the outer end 53 is increased, the effect on the increase of the rotational force for rotating the support shaft 3 is small. On the other hand, if the protruding amount P1 near the outer end 53 is increased, the fluid resistance and moment of inertia of the support member 4 increase, and the device performance is reduced. In the outer wall surface portion 50 and the first inner wall surface portion 51 located away from the outer end 53, the lift vector is generated toward the traveling direction Dt side compared to the outer end 53, and therefore has a large effect on the increase in the rotational force for rotating the support shaft 3. Therefore, by setting the protrusion amount Px of the curved outer portion 40 to be larger the further away from the outer end 53, the protrusion amount of the curved outer portion 40 is secured while reducing the protrusion amount P1 near the outer end 53, and thereby it is possible to suppress a decrease in device performance.

[0061] Moreover, the linear outer shape portion 41 of the support member 4 is formed in a straight line connecting the curved outer shape portions 40 along the inner wall surface portions 51, 52 with respect to the outside Ds in the short side direction of the pressure-receiving member 5 in a plan view, and protrudes from the inner wall surface portions 51, 52 to the outside Ds in the short side direction. As a result, the protrusion amount Py of the linear outer shape portion 41 is smaller than when the shape of the support member 4 in a plan view is formed in a circular shape, and therefore the overhang from the inner wall surface portions 51, 52 is reduced, and therefore it is possible to easily ensure the strength of the device.

[0062] Furthermore, since the straight outer portions 41 of the support members 4 are formed in parallel straight lines, for example, when manufacturing or transporting the vertical axis resistance type wind power generator 1A, the straight outer portions 41 can be used as a temporary placement surface to place the generator horizontally, or the straight outer portions 41 of the support members 4 of multiple vertical axis resistance type wind power generators 1A can be stacked vertically by arranging the straight outer portions 41 of the support members 4 of each of the vertical axis resistance type wind power generators 1A facing each other.

[0063] 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 a vertical axis drag type wind power generator 1B according to the second embodiment.

[0064] The vertical axis drag type wind power generator 1B according to this embodiment differs from the first embodiment in that the planar shape of the support member 4 is changed, and other basic configurations are the same as those of the first embodiment. The following mainly describes the features of this embodiment.

[0065] 10 and 11 are schematic diagrams showing an example of the arrangement and each parameter of a vertical axis drag type wind power generator 1B according to the second embodiment. Note that in FIG. 11, the support shaft 3 is omitted.

[0066] In a plan view perpendicular to the axial direction Da of the support shaft 3, parameters for specifying the arrangement and shape of each part of the vertical-axis drag type wind power generator 1B are defined as follows. Here, only parameters different from the first embodiment are described. Note that each parameter corresponds to the size of each part, and therefore can take a positive value.

[0067] R5: the first radius of curvature of the curved outer portion 40 (=R2), R6: the second radius of curvature of the curved contour portion 40

[0068] The curved outer shape portion 40 is formed in a curved shape in which the planar shape is a plurality of arcs each having a plurality of radii of curvature R5, R6. The plurality of radii of curvature R5, R6 in the curved outer shape portion 40 are set to be smaller as the distance from the outer end 53 increases. In this embodiment, the curved outer shape portion 40 is formed in a curved shape in which an arc having a first radius of curvature R5 and an arc having a second radius of curvature R6 smaller than the first radius of curvature R5 are connected as a plurality of arcs each having a plurality of radii of curvature. Note that the number of radii of curvature R5, R6 is not limited to two as in this embodiment, but may be three or more. The plurality of radii of curvature R5, R6 may be set to be larger as the distance from the outer end 53 increases.

[0069] In this case, it is preferable that the multiple radii of curvature R5, R6 include a radius of curvature R5 larger than the radius R1 of the circumscribing circle of the outer end 53 centered on the rotation central axis O1, and a radius of curvature R6 smaller than the radius R1 of the circumscribing circle of the outer end 53. In this embodiment, the first radius of curvature R5 is larger than the radius R1 of the circumscribing circle of the outer end 53 and is equal to the radius R2 of the circumscribing circle of the curved outer shape portion 40. In addition, the second radius of curvature R6 is smaller than the radius R1 of the circumscribing circle of the outer end 53 and larger than the radius of curvature R3 of the outer wall surface portion 50.

[0070] As described above, according to the vertical axis drag type wind power generator 1B of this embodiment, similarly to the first embodiment, it is possible to easily ensure the strength of the device while suppressing the deterioration of the device performance.

[0071] (Third embodiment) Fig. 12 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1C according to the third embodiment. Fig. 13 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1C according to the third embodiment.

[0072] The vertical axis drag type wind power generator 1C according to this embodiment differs from the first embodiment in that it includes a pair of support members 4 arranged at both ends in the axial direction Da as the multiple support members 4, and further includes at least one auxiliary support member 6 arranged at a predetermined interval L1 between the pair of support members 4, but the other basic configurations are the same as those of the first embodiment. In this embodiment, the vertical axis drag type wind power generator 1C includes one auxiliary support member 6 as shown in Fig. 12. The following mainly describes the features of this embodiment.

[0073] The auxiliary support member 6, together with the pair of support members 4, supports the pressure-receiving member 5 disposed therebetween. The auxiliary support member 6 has a different shape in a plan view from the support members 4, and has an outer shape whose area in a plan view is smaller than that of the support members 4. The materials, manufacturing method, fixing method, etc. of the auxiliary support member 6 are configured similarly to those of the support members 4.

[0074] The auxiliary support member 6 has an outer shape in which the amount of longitudinal projection of the auxiliary support member 6 from the outer wall surface portion 50 to the radially outward Dr1 is set to be smaller than that of the support member 4, and the amount of transverse projection of the auxiliary support member 6 from the inner wall surface portions 51, 52 to the transversely outward Ds is set to be smaller than that of the support member 4. For example, the amount of longitudinal projection of the auxiliary support member 6 is set to be approximately the same as the amount of projection P1 when the curved outer shape portion 40 of the support member 4 projects from the outer end 53 to the radially outward Dr1, and is not set to be large even when it is separated from the outer end 53, but is set to be approximately the same as the amount of projection P1. The amount of longitudinal projection of the auxiliary support member 6 may be set to be smaller than the amount of longitudinal projection Px of the support member 4.

[0075] In this embodiment, the auxiliary support member 6 has, as a planar shape, a pair of outer wall surface contour parts 60 formed along the outer wall surface part 50, a pair of first inner wall surface contour parts 61 formed along the first inner wall surface part 51, a pair of second inner wall surface contour parts 62 formed along the second inner wall surface part 52, and a pair of linear contour parts 63 formed so as to connect the pair of outer wall surface contour parts 60 and the pair of second inner wall surface contour parts 62, respectively. The planar shape of the auxiliary support member 6 is not limited to the above example, and may be changed as appropriate. In this case, the contour of the auxiliary support member 6 may overlap a part of the contour of the support member 4 in a planar view, or may be smaller than the contour of the support member 4.

[0076] Fig. 14 is a graph showing a comparison of the simulation results of the output coefficient Cp depending on the change in the shape of the support member 4 and the presence or absence of the auxiliary support member 6. Fig. 14 shows the output coefficient Cp (left side of the vertical axis) for the vertical axis drag type wind power generator 9 as a comparative example, the vertical axis drag type wind power generator 1A-1 (two support members 4) according to the first example included in the first embodiment, the vertical axis drag type wind power generator 1A-2 (three support members 4) according to the second example included in the first embodiment, and the vertical axis drag type wind power generator 1C-3 (two support members 4, one auxiliary support member 6) according to the third example included in the third embodiment. Also, Fig. 14 shows the ratios (right side of the vertical axis) of the output coefficients Cp of the vertical axis drag type wind power generators 1A-1, 1A-2, and 1C-3 of the other examples when the output coefficient Cp of the vertical axis drag type wind power generator 9 as a comparative example is used as a reference. The vertical axis drag type wind power generator 9 serving as the comparative example has two support members whose planar area is smaller than that of the support member 4 and whose longitudinal protrusion amount is set to a constant amount. Other configurations (e.g., the shape and arrangement of the pressure-receiving member 5) are common between the vertical axis drag type wind power generator 9 serving as the comparative example and the vertical axis drag type wind power generators 1A-1, 1A-2, and 1C-3 according to the first to third embodiments.

[0077] The vertical axis drag type wind power generator 1A-1 of the first embodiment is a generator in which the shape of the support members 4 arranged at both ends is changed so that the longitudinal and lateral protrusion amounts are larger than those of the vertical axis drag type wind power generator 9 of the comparative example. By changing the shape of the support members 4, it was found that the output coefficient P of the vertical axis drag type wind power generator 1A-1 of the first embodiment is improved by about 20% compared to the vertical axis drag type wind power generator 9 of the comparative example.

[0078] The vertical axis drag type wind power generator 1A-2 of the second embodiment is obtained by adding an intermediate support member 4 disposed between both ends to the vertical axis drag type wind power generator 1A-1 of the first embodiment. It was found that the addition of the intermediate support member 4 results in almost no change in the output coefficient P of the vertical axis drag type wind power generator 1A-2 of the second embodiment compared to the vertical axis drag type wind power generator 1A-1 of the first embodiment.

[0079] The vertical-axis drag wind power generator 1C-3 of the third embodiment is different from the vertical-axis drag wind power generator 1A-2 of the second embodiment in that the shape of the intermediate support member 4 arranged between both ends is changed to an auxiliary support member 6 so that the longitudinal protrusion amount and the lateral protrusion amount are small. It was found that the vertical-axis drag wind power generator 1C-3 of the third embodiment has almost no change in output coefficient P compared to the vertical-axis drag wind power generator 1A-2 of the second embodiment due to the change from the support member 4 to the auxiliary support member 6. Therefore, since the shape of the intermediate auxiliary support member 6 arranged between both ends does not affect the deterioration of the device performance, it is preferable to make it as small as possible from the viewpoint of reducing the weight of the device and preventing snow accumulation.

[0080] As described above, according to the vertical axis drag type wind power generator 1C of this embodiment, the auxiliary support member 6 arranged between the pair of support members 4 is formed so as to follow the outer wall surface portion 50 and the inner wall surface portions 51 and 52, so that the area of ​​the auxiliary support member 6 in a plan view can be reduced. Therefore, the weight of the device can be reduced, and similarly to the first embodiment, the strength of the device can be easily ensured while suppressing the deterioration of the device performance.

[0081] (Fourth embodiment) FIG. 15 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1D according to the fourth embodiment.

[0082] The vertical axis drag type wind power generator 1D 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.

[0083] The support shaft 3 includes a coupling mechanism 30 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 43 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 30 of the support shaft 3 and the coupling mechanism 43 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 30 of the support shaft 3 and the coupling mechanism 43 of the support member 4 may be omitted.

[0084] In this embodiment, the vertical-axis drag type wind power generator 1D is described as having two drag type turbine units 10 as shown in FIG. 15, but the number of drag type turbine units 10 may be three or more. When a plurality of drag type turbine units 10 are connected via at least one of the connection mechanism 30 of the support shaft 3 and the connection mechanism 43 of the support member 4, the pressure-receiving members 5 of each of the plurality of drag type turbine units 10 may be arranged in the same direction as shown in FIG. 15, 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 the support members 4 and the 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) of pressure-receiving members 5. Furthermore, a plurality of 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.

[0085] As described above, according to the vertical axis drag type wind generator 1D of this embodiment, a single vertical axis drag type wind generator 1D is formed by connecting multiple drag type turbine units 10, so that the power generation output of the vertical axis drag type wind generator 1D can be changed depending on the number of drag type turbine units 10.

[0086] (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.

[0087] In the above embodiment, the case where three 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 may be four or more.

[0088] In the above embodiment, the pressure-receiving member 5 rotates clockwise around the rotation center 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.

[0089] In the above embodiment, the multiple pressure-receiving members 5 have been described as having shapes as shown in Fig. 3, Fig. 9, 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 support member 4 may also be changed as appropriate.

[0090] 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.

[0091] 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.

[0092] In the above embodiment, the vertical axis drag type wind generators 1A to 1D 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.

[0093] In the above embodiment, the vertical axis drag type wind generators 1A to 1D 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]

[0094] 1A~1D: Vertical axis drag type wind turbine generator (drag type turbine device), 2... supporting housing, 3... supporting shaft, 4... supporting member, 5... pressure-receiving member, 6... auxiliary supporting member, 10...drag type turbine unit, 20...power generation unit, 30...connection mechanism part, 40...Curved external part, 41...Straight external part, 43...Connection mechanism part, 50~52...Wall surface part, 50: outer wall surface portion, 51: first inner wall surface portion, 52: second inner wall surface portion, 53...outer end, 54...inner end, 55...outer boundary, 56...inner boundary, 60: outer wall surface contour portion; 61: first inner wall surface contour portion; 62: second inner wall surface contour portion; 63: straight line contour portion

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 pair of pressure-receiving members symmetrically disposed with respect to the rotational center axis of the support shaft between adjacent support members and supported by the support members; Each of the plurality of pressure-receiving members includes As a wall surface portion extending between an outer end and an inner end disposed on the opposite side of the outer end with respect to the rotation central axis and radially inward of the support shaft than the outer end in a plan view perpendicular to the axial direction, an outer wall surface portion that is formed in a curved shape and bulges outward in the radial direction, the outer wall surface portion being extended between the outer end and an outer boundary portion that is disposed on the side in the direction of travel when the pressure-receiving member receives fluid pressure relative to the outer end and the support shaft rotates and is closer to the rotation central axis; the one or more inner wall surface portions are provided between the outer boundary portion and the inner end disposed on the traveling direction side of the outer boundary portion, and are formed into a curved or flat shape that bulges outward in the radial direction, Each of the plurality of support members has a shape in the plan view of: a pair of curved outer shaped portions that are formed in a curved shape along the outer wall surface portion on the longitudinal outer sides of the pair of pressure-receiving members, and that have a longitudinal protrusion amount that protrudes radially outward from the outer wall surface portion larger as the curved outer shaped portions move away from the outer ends; a pair of linear contour portions that are formed along the inner wall surface portion with respect to the outer sides of the pair of pressure-receiving members in the lateral direction so as to connect the pair of curved contour portions with each other, and that protrude outward from the inner wall surface portion in the lateral direction; Drag type turbine device.

2. The plurality of support members include A pair of the support members arranged at both ends in the axial direction, At least one auxiliary support member is disposed between the pair of support members at a predetermined interval and supports the pressure-receiving member. The auxiliary support member has a shape in the plan view of: A longitudinal protrusion amount protruding from the outer wall surface portion to the radially outward direction is set so as not to be larger than that of the support member, a lateral protrusion amount of the outer shape portion protruding outward from the inner wall surface portion in the lateral direction is set to be smaller than that of the support member; 2. The drag turbine arrangement of claim 1.

3. Each of the pair of curved contour portions is The shape in a plan view is formed into a curved surface that is an arc having a single radius of curvature, The radius of curvature is The radius of the circumscribing circle of the outer end is set smaller than the radius of the circumscribing circle of the outer end.

2. The drag turbine arrangement of claim 1.

4. Each of the pair of curved contour portions is The shape in a plan view is formed into a curved surface having a plurality of arcs each having a plurality of radii of curvature, The plurality of radii of curvature include The distance from the outer end is set smaller, and a radius of curvature larger than the radius of a circumscribing circle of the outer end centered on the rotation central axis, and a radius of curvature smaller than the radius of the circumscribing circle of the outer end centered on the rotation central axis; 2. The drag turbine arrangement of claim 1.

5. The amount of protrusion in the longitudinal direction is When the protrusion amount from the outer end to the curved outer portion is defined as the reference value (P1) of the longitudinal protrusion amount, A ratio of a reference value (P1) of the longitudinal protrusion amount to a diameter (D) of a circumscribing circle of the outer end centered on the rotation central axis is set to 3% or more and 5% or less, A protruding amount in the lateral direction by which each of the pair of linear outer shaped portions protrudes outward from the inner wall surface portion in the lateral direction is In the case where the linear outer shape portion is formed on a tangent to a virtual arc set concentrically to the outer wall portion, when the protrusion amount from the outer end to the virtual arc is defined as the reference value (P2) of the short-side protrusion amount, The ratio of the reference value (P2) of the short-side protrusion amount to the diameter (D) is set to 10% or more and 20% or less.

2. The drag turbine arrangement of claim 1.

6. The inner wall portion is a first inner wall surface portion extending between the outer boundary portion and an inner boundary portion disposed on the outer boundary portion in the traveling direction and closer to the rotation central axis, the first inner wall surface portion being formed in a planar shape; a second inner wall portion formed in a planar shape and extending between the inner boundary portion and the inner end disposed on the traveling direction side with respect to an extension line of the first inner wall portion; 2. The drag turbine arrangement of claim 1.

7. The amount of lateral projection (P4) of each of the pair of linear contour portions projecting outward in the lateral direction from the inner boundary portion is The pair of linear outer shaped portions are set smaller than the lateral protrusion amount (P3) by which each of the pair of linear outer shaped portions protrudes outward in the lateral direction from the inner end.

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

8. 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 regarded 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.

9. A drag type turbine device according to any one of claims 1 to 8, Wind, water or tidal rotating devices.

10. A drag type turbine device according to any one of claims 1 to 8, Wind, hydro or tidal generators.

Images