Drag type turbine device, wind power rotation device, hydraulic power rotation device, and tidal power rotation device using drag type turbine device, and wind power generator, hydraulic power generator, tidal power generator using drag type turbine device

Abstract

To provide a drag type turbine device which enables improvement of performance and strength of the device.SOLUTION: A drag type turbine device 1A includes: a support shaft 3; a plurality of support members 4 fixed to the support shaft 3 at predetermined intervals in an axial direction of the support shaft 3; and a plurality of pressure receiving members 5 which are symmetrically disposed around the support shaft 3 while making a pair and supported by the support members 4. The pressure receiving member 5 includes, as a wall surface part extending between an outer end 53 and an inner end 54, an outer wall surface part 50 which extends from the outer end 53 and is formed in a curved surface form, an intermediate wall surface part 51 extending from the outer wall surface part 50 and formed into a flat surface form, and an inner wall surface part 52 extending from the intermediate wall surface part 51 to the inner end 54 and formed in the flat surface form. When the pair of pressure receiving members 5 is symmetrically disposed, the inner end 54 of one of the pressure receiving members 5 is disposed in a first area enclosed by a first straight line ZL1, a second straight line ZL2, a third straight line ZL3, and a fourth straight line ZL4 in a plan view.SELECTED DRAWING: Figure 5

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 drag-type wind power generators, Patent Document 1 discloses a Savonius-type wind turbine having multiple blades with a C-shaped (arcuate) cross section, and 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 2006-152937 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 Documents 1 and 2, the blades are supported by support members arranged at intervals in the vertical direction without providing a support shaft at the rotation center of the drag type wind power generator. Therefore, the blade design has the advantage of having a high degree of freedom in its shape and arrangement, but in the case of a configuration without a support shaft, in order to ensure the strength of the device, it is necessary to increase the strength of the blades, which makes the blades heavier and inevitably increases the cost of the device. On the other hand, in the case of a configuration with a support shaft at the rotation center of the drag type wind power generator, the presence of the support shaft restricts the design of the blades, and the airflow flowing from the blade moving from the windward side to the leeward side to the blade moving from the leeward side to the windward side is obstructed, which leads to a decrease in power generation efficiency, and it is difficult to achieve both the performance and the improvement of the strength of the device.

[0005] Therefore, an object of the present invention is to provide a drag type turbine device that makes it possible to achieve both improved performance and strength of the device, a wind-powered rotation device, a hydroelectric rotation device, and a tidal-powered rotation device that use the drag type turbine device, and a wind-powered generator, a hydroelectric generator, and a tidal-powered generator that use the drag 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 arranged symmetrically in pairs around the support shaft with a space between adjacent support members along the axial direction and in a radial direction of the support shaft, and are supported by the support members; Each of the plurality of pressure-receiving members includes As a wall surface portion extending between an outer end disposed radially outward in a plan view perpendicular to the axial direction and an inner end disposed radially inward relative to the outer end on the opposite side of the outer end with respect to the support shaft, an outer wall surface portion extending from the outer end toward a direction of travel of the pressure-receiving member when the pressure-receiving member receives fluid pressure and rotates the support shaft, the outer wall surface portion being formed in a curved shape that bulges outward in the radial direction; an intermediate wall portion extending from the outer wall portion toward the traveling direction and toward the support shaft via a curved or bent outer boundary portion and formed in a flat shape; an inner wall surface portion that is formed in a planar shape and extends from the intermediate wall surface portion via a curved or bent inner boundary portion to the inner end that is disposed on the traveling direction side of the intermediate wall surface portion, When the pair of pressure-receiving members are symmetrically disposed, the inner end of one of the pressure-receiving members is In the plan view, the first region is disposed, The first region is a first straight line that is parallel to the intermediate wall surface portion of one of the pressure-receiving members and is tangent to the support shaft on the side of the one of the pressure-receiving members; a second straight line that is parallel to the intermediate wall surface portion of one of the pressure-receiving members and is tangent to the support shaft on the other pressure-receiving member side; a third straight line connecting the inner boundary portion of one of the pressure-receiving members and the outer boundary portion of the other pressure-receiving member; The area is surrounded by a fourth straight line connecting the outer end of the other pressure-receiving member and the outer boundary of the other pressure-receiving member.

[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 a drag type turbine device according to an embodiment of the present invention, each of the multiple pressure-receiving members has, in a plan view perpendicular to the axial direction of the support shaft, an outer wall surface portion extending from an outer end and formed in a curved shape, an intermediate wall surface portion extending from the outer wall surface portion and formed in a flat shape, and an inner wall surface portion extending from the intermediate wall surface portion to an inner end and formed in a flat shape. When a pair of pressure-receiving members are arranged symmetrically, the inner end of one pressure-receiving member is arranged in a first region surrounded by the first straight line, the second straight line, the third straight line, and the fourth straight line in a plan view.

[0009] As a result, the pair of pressure-receiving members are supported between the adjacent support members, so that the entire device is configured to form a monocoque structure. In addition, by disposing the inner end of the pressure-receiving member in the first region, a passage for fluid to flow between the support shaft and the multiple pressure-receiving members is secured. Therefore, when a fluid flows from a predetermined direction, the fluid flows in from the outer end along the outer wall surface portion, passes between the support shaft and the intermediate wall surface portion and the inner wall surface portion, and flows out from the inner end. Therefore, it is possible to improve both the performance and strength of the device. [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. 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. 2 is a schematic diagram showing each parameter of the vertical axis resistance type wind power generator 1A according to the first embodiment. [Diagram 5] FIG. 1 is a schematic diagram showing an example of arrangement of a vertical axis drag type wind power generator 1A according to a first embodiment and each characteristic line. [Figure 6] 13 is a distribution diagram showing the output coefficient Cp and the first region ZA when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. [Figure 7]13 is a distribution diagram showing the output coefficient Cp and the second region ZB when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. [Figure 8] 13 is a distribution diagram showing the output coefficient Cp and the third region ZC when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. [Figure 9] 13 is a distribution diagram showing the output coefficient Cp and the fourth region ZD when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. [Figure 10] 11 is a distribution diagram showing a change in the output coefficient Cp with respect to the first shortest distance s and the third shortest distance u. FIG. [Figure 11] 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 12] 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 13] 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 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.

[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, and a plurality of pressure-receiving members 5 arranged around the support shaft 3 along the axial direction Da between the plurality of support members 4 and spaced apart in the radial directions Dr1 and Dr2 of the support shaft 3, 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.

[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) 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 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 arranged in pairs symmetrically with respect to the rotation center axis O1 of the support shaft 3 between each of the three support members 4, i.e., between adjacent support members 4, as the multiple pressure receiving members 5. That is, the vertical axis drag type wind power generator 1A includes four 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 (two 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, each of the multiple support members 4 is fixed to the support shaft 3 via a connecting and fixing member (not shown) formed, for example, in a ring shape or flange shape. In addition, each of the multiple support members 4 is fixed to a pair of pressure-receiving members 5 arranged therebetween by any fixing method as described above, and supports the pressure-receiving members 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 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.

[0021] Each of the multiple support members 4 has, as a shape (planar 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 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 (both of which 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] 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.

[0023] 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.

[0024] In plan view, the straight line contour portions 41 are disposed on respective short-side outer sides Ds of the pair of pressure-receiving members 5. In plan view, the straight line contour portions 41 protrude from the intermediate wall surface portion 51 and the inner wall surface portion 52 to the short-side outer sides Ds.

[0025] Each of the pair of pressure-receiving members 5 has wall surface portions 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 of the outer end 53 with respect to the support shaft 3 and on the radially inner side Dr2 of the outer end 53 in a plan view perpendicular to the axial direction Da (see FIG. 3). In this embodiment, each of the pair of pressure-receiving members 5 has, as the wall surface portions 50-52, an outer wall surface portion 50, an intermediate wall surface portion 51, and an inner wall surface portion 52, as well as an outer boundary portion 55 disposed at the boundary portion between the outer wall surface portion 50 and the intermediate wall surface portion 51, and an inner boundary portion 56 disposed at the boundary portion between the intermediate wall surface portion 51 and the inner wall surface portion 52.

[0026] 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 curved shape that bulges outward in the radial direction Dr1. The outer wall surface portion 50 may be formed in a curved shape that does not obstruct the flow of air, for example, a curved shape that is an arc, an elliptical arc, or other curved shape in a plan view. When the outer wall surface portion 50 is curved in 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 plan view shape other than an arc, it is sufficient that the outer wall surface portion 50 is extended in a range similar to that of an arc.

[0027] The intermediate wall surface portion 51 is a wall surface portion that is extended 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 planar shape. That is, the intermediate wall surface portion 51 is formed in a planar shape that is a straight line in a planar view. When the planar view shape of the outer wall surface portion 50 is a curved surface such as a circular arc or an elliptical arc, the intermediate wall surface portion 51 may be a planar 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 intermediate wall surface portion 51 (tangent to the circular arc or elliptical arc). This makes it possible to smooth the flow of wind from the outer wall surface portion 50 toward the intermediate wall surface portion 51.

[0028] The inner wall surface portion 52 is a wall surface portion formed in a planar shape and extending from the intermediate wall surface portion 51 through the inner boundary portion 56 to an inner end 54 disposed on the traveling direction side Dt of the intermediate wall surface portion 51. That is, the inner wall surface portion 52 is formed in a planar shape having a straight line shape in a plan view.

[0029] 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 perpendicular to the axial direction Da, 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 perpendicular to the axial direction Da, 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.

[0030] The outer boundary portion 55 and the inner boundary portion 56 are formed in a curved or bent shape. The shapes of the outer boundary portion 55 and the inner boundary portion 56 may be the same or different. In addition, when the outer boundary portion 55 is curved, it may be formed in the same curved surface shape as the outer wall portion 50.

[0031] 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 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 entire wall surface portions 50 to 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) 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.

[0032] The wall portions 50 to 52 may be manufactured by fixing the outer wall portion 50, the intermediate wall portion 51, and the inner wall portion 52, which are formed as separate parts, via fixing portions by any fixing method (welding, bonding, screw fixing, press fitting, rivets, pin connection, joints, etc.). In this case, the fixing portions of the outer wall portion 50 and the intermediate wall portion 51 correspond to the curved outer boundary portion 55, and the fixing portions of the intermediate wall portion 51 and the inner wall portion 52 correspond to the curved inner boundary portion 56.

[0033] 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 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.

[0034] In this embodiment, each of the pair of pressure-receiving members 5 has wall surface portions 50-52 which are integrally formed as a whole, as shown in Fig. 3. In this case, the outer wall surface portion 50 is formed into an arcuate curved surface shape having a radius of curvature 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 each formed into an arcuate curved surface shape when viewed from above.

[0035] 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 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. Furthermore, each of the pair of pressure receiving members 5 is arranged such that the intermediate wall surface portion 51 and the inner wall surface portion 52 are 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 perpendicular to the axial direction Da 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.

[0036] When the pair of pressure-receiving members 5 are arranged symmetrically, they are arranged so as to satisfy the following relationship using various parameters defined for each part of the vertical axis drag type wind power generator 1A.

[0037] FIG. 4 is a schematic diagram showing each parameter of the vertical axis drag type wind power generator 1A according to the first embodiment.

[0038] 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.

[0039] D: diameter of the circumscribing circle C1 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), 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 (second shortest distance) between the intermediate wall surface portion 51 of the pressure-receiving member 5 and the outer circumferential surface of the support shaft 3, u: the distance between the inner end 54 of the pressure-receiving member 5 and the rotation central axis O1 (third shortest distance), W: Dimension of the support member 4 in the short direction (support member width), θ: Angle between the intermediate wall surface portion 51 and the inner wall surface portion 52

[0040] In this embodiment, the parameters (D, d, R, s, t, u, W) of the vertical axis resistance type wind turbine generator 1A are set in units of "mm" as follows: D=1000, d=140, R=200, s=100, t=27, u=280, W=450.

[0041] FIG. 5 is a schematic diagram showing an example of the arrangement of the vertical axis drag type wind power generator 1A according to the first embodiment and each characteristic line.

[0042] When a pair of pressure-receiving members 5 are arranged symmetrically, the inner end 54 of one pressure-receiving member 5 is arranged in a first area ZA defined by the following characteristic lines in a plan view perpendicular to the axial direction Da. Here, when one pressure-receiving member 5 indicates a pressure-receiving member 5 arranged toward the right side of the paper in Fig. 5, the other pressure-receiving member 5 indicates a pressure-receiving member 5 arranged toward the left side of the paper in Fig. 5. Also, when one pressure-receiving member 5 indicates a pressure-receiving member 5 arranged toward the left side of the paper in Fig. 5, the other pressure-receiving member 5 indicates a pressure-receiving member 5 arranged toward the right side of the paper in Fig. 5.

[0043] The first region ZA is a region surrounded by a first straight line ZL1 which is a straight line parallel to the intermediate wall surface portion 51 of one pressure-receiving member 5 and tangent to the support shaft 3 on the side of one pressure-receiving member 5, a second straight line ZL2 which is a straight line parallel to the intermediate wall surface portion 51 of one pressure-receiving member 5 and tangent to the support shaft 3 on the side of the other pressure-receiving member 5, a third straight line ZL3 connecting the inner boundary portion 56 of one pressure-receiving member 5 and the outer boundary portion 55 of the other pressure-receiving member 5, and a fourth straight line ZL4 connecting the outer end 53 of the other pressure-receiving member 5 and the outer boundary portion 55 of the other pressure-receiving member 5.

[0044] It is more preferable that the inner end 54 of one pressure-receiving member 5 is disposed in a second region ZB defined by the following characteristic lines in a plan view perpendicular to the axial direction Da.

[0045] The second region ZB is a region surrounded by the above-mentioned first straight line ZL1, the above-mentioned third straight line ZL3, a fifth straight line ZL5 which is a straight line parallel to the intermediate wall surface portion 51 of one of the pressure-receiving members 5 and passes through the rotational center axis O1 of the support shaft 3, and a first arc line ZA1 which is centered on the rotational center axis O1 of the support shaft 3 and passes through the outer boundary portion 55 of the other pressure-receiving member 5.

[0046] Moreover, it is more preferable that the inner end 54 of one pressure-receiving member 5 is disposed in a third region ZC defined by the following characteristic lines in a plan view perpendicular to the axial direction Da.

[0047] The third region ZC is a region surrounded by the third straight line ZL3, the fifth straight line ZL5, the first arc line ZA1, and a sixth straight line ZL6 which is a straight line passing through the intersection of the fifth straight line ZL5 and the circumscribing circle C1 of the outer end 53 and which is tangent to the support shaft 3 on one side of the pressure-receiving member 5.

[0048] Furthermore, it is more preferable that the inner end 54 of one pressure-receiving member 5 is disposed in a fourth zone ZD defined by the following characteristic line in a plan view perpendicular to the axial direction Da.

[0049] The fourth region ZD is a region surrounded by the third straight line ZL3, the fifth straight line ZL5, the sixth straight line ZL6, the first arc line ZA1, and a seventh straight line ZL7 which is a straight line passing through the intersection of the second straight line ZL2 and the circumscribing circle C1 of the outer end 53 and which is tangent to the support shaft 3 on one side of the pressure-receiving member 5.

[0050] Furthermore, when a pair of pressure-receiving members 5 are disposed symmetrically, the inner boundary portion 56 of one of the pressure-receiving members 5 is disposed on the opposite side to the support shaft 3 with respect to the first straight line ZL1 in a plan view perpendicular to the axial direction Da.

[0051] In addition, the inner boundary 56 of one pressure-receiving member 5 is a straight line passing through the outer end 53 of the other pressure-receiving member 5 when viewed in a plane perpendicular to the axial direction Da, and is preferably positioned on the opposite side of the support shaft 3 with respect to an eighth straight line ZL8 that is tangent to the support shaft 3 on the one pressure-receiving member 5 side, and is also preferably positioned on the support shaft 3 side with respect to a ninth straight line ZL9 that connects the outer end 53 of the other pressure-receiving member 5 and the outer boundary 55 of one pressure-receiving member 5.

[0052] FIG. 6 is a distribution diagram showing the output coefficient Cp and the first region ZA when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. 7 is a distribution diagram showing the output coefficient Cp and the second region ZB when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. 8 is a distribution diagram showing the output coefficient Cp and the third region ZC when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. 9 is a distribution diagram showing the output coefficient Cp and the fourth region ZD when the position of the inner end 54 of the pressure-receiving member 5 is changed. FIG. 10 is a distribution diagram showing the change in the output coefficient Cp with respect to the first shortest distance s and the third shortest distance u.

[0053] The power coefficient Cp of the vertical axis drag type wind turbine generator 1A is defined as follows. 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.

[0054] The tip speed ratio λ of the vertical axis drag type wind power generator 1A is defined as follows. λ=V / U Here, V is the rotational speed (circumferential speed) of the outer end 53.

[0055] The distribution of the power coefficient Cp shown in Figures 6 to 10 is calculated by simulation when the wind speed is 10 m / s and the peripheral speed ratio λ is 0.6. The simulation was performed under the following conditions: the outer end diameter D, the support shaft diameter d, the curvature radius R, the second shortest distance t, and the ratio of the support member width W (D:d:R:t:W) are: D=1000, d=140, R=200, t=27, W=450 10 is a graph showing the output coefficient Cp when the first shortest distance s and the third shortest distance u are changed when the condition (1) is satisfied. The white circles (◯) shown in Fig. 10 indicate the positions of the first shortest distance s (=100) and the third shortest distance u (=280) in this embodiment.

[0056] 6 to 10, when the inner end 54 is located in a light-colored portion, the output coefficient Cp is large, and when the inner end 54 is located in a dark-colored portion, the output coefficient Cp is small. Therefore, it was found that when the inner end 54 is in the first region ZA shown in Fig. 6, the output coefficient Cp is large. In particular, it was found that when the inner end 54 is in the second region ZB shown in Fig. 7, the output coefficient Cp is stably large, when the inner end 54 is in the third region ZC shown in Fig. 8, the output coefficient Cp is even more stably large, and when the inner end 54 is in the fourth region ZD shown in Fig. 9, the output coefficient Cp is even more stably large.

[0057] Here, the parameters (D, d, R, s, t, u, W) in the vertical axis drag type wind turbine 1A have been described as being set by the outer end diameter D (=1000) and the ratios of the other parameters (support shaft diameter d, radius of curvature R, first shortest distance s, second shortest distance t, third shortest distance u, and support member width W), but the specific numerical values ​​(actual dimensions) of the parameters (D, d, R, s, t, u, W) may be realized in multiple embodiments.

[0058] For example, the actual dimensions (unit: mm) of each parameter (D, d, R, s, t, u, W) in this embodiment include multiple examples, as shown in (S1) to (S3) below. (S1)D=1000,d=140,R=200,s=100,t=27,u=280,W=450 (S2)D=2000,d=280,R=400,s=200,t=54,u=560,W=900 (S3)D=500,d=70,R=100,s=50,t=13.5,u=140,W=225

[0059] In the vertical axis drag type wind power generator 1A having the above 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) acts on the leeward pressure receiving member 5 to rotate it in the traveling direction Dt. Then, 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, it 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 portion 56 of the windward and leeward pressure receiving members 5 and the outer circumferential surface of the support shaft 3, and 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. In addition, when the windward-side 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 downwind direction (opposite to the traveling direction). On the other hand, when the wind that has flowed in between the pair of pressure receiving members 5 flows out along the outer wall surface portion 50 of the windward-side pressure receiving member 5, the outer wall surface portion 50 of the windward-side pressure receiving member 5 receives the wind, generating a rotational force that presses the outer wall surface portion 50 of the pressure receiving member 5 in the upwind direction (traveling direction side Dt), so that a part of the rotational force acting in the opposite direction to the traveling direction is offset by the rotational force acting in the traveling direction side Dt.

[0060] 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.

[0061] As described above, according to the vertical-axis drag type wind power generator 1A of this embodiment, each of the multiple pressure receiving members 5 has, in a plan view perpendicular to the axial direction Da of the support shaft 3, an outer wall surface portion 50 extending from the outer end 53 and formed in a curved shape, an intermediate wall surface portion 51 extending from the outer wall surface portion 50 and formed in a flat shape, and an inner wall surface portion 52 extending from the intermediate wall surface portion 51 to the inner end 54 and formed in a flat shape. When a pair of pressure receiving members 5 are arranged symmetrically, the inner end 54 of one pressure receiving member 5 is arranged in a first area ZA (preferably, the second area ZB, more preferably, the third area ZC, and even more preferably, the fourth area ZD) surrounded by the first straight line ZL1, the second straight line ZL2, the third straight line ZL3, and the fourth straight line ZL4 in a plan view.

[0062] As a result, the pair of pressure-receiving members 5 are supported between the adjacent support members 4, so that the entire device is configured to have a monocoque structure. In addition, the inner end 54 of the pressure-receiving member 5 is disposed in the first area ZA (preferably the second area ZB, more preferably the third area ZC, and even more preferably the fourth area ZD), so that a passage for fluid to flow between the support shaft 3 and the multiple pressure-receiving members 5 is secured. Therefore, when a fluid flows from a predetermined direction, the fluid flows in from the outer end 53 along the outer wall surface portion 50, passes between the support shaft 3 and the intermediate wall surface portion 51 and the inner wall surface portion 52, and flows out from the inner end 54. Therefore, it is possible to achieve both improved performance and strength of the device.

[0063] Second Embodiment Fig. 11 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1B according to the second embodiment. Fig. 12 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 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 configuration is the same as that of the first embodiment. In this embodiment, the vertical axis drag type wind power generator 1B includes one auxiliary support member 6 as shown in Fig. 11. The following mainly describes the features of this embodiment.

[0065] 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.

[0066] 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 intermediate wall surface portion 51 and the inner wall surface portion 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 of the curved outer shape portion 40 of the support member 4 when it projects from the outer end 53 to the radially outward Dr1, and is not set large even when it moves away from the outer end 53, but is set to be approximately the same as the amount of projection. The amount of longitudinal projection of the auxiliary support member 6 may be set to be smaller than the amount of longitudinal projection of the support member 4.

[0067] 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 intermediate wall surface contour parts 61 formed along the intermediate wall surface part 51, a pair of inner wall surface contour parts 62 formed along the 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 inner wall surface contour parts 62, respectively. Note that the planar shape of the auxiliary support member 6 is not limited to the above example as long as the area in a planar view is smaller than that of the support member 4, and may be appropriately changed. 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.

[0068] As described above, according to the vertical axis drag type wind power generator 1B of this embodiment, the auxiliary support member 6 disposed between the pair of support members 4 is formed so as to follow the outer wall surface portion 50, the intermediate wall surface portion 51, and the inner wall surface portion 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 the strength of the device can be easily ensured while improving the device performance, as in the first embodiment.

[0069] (Third embodiment) FIG. 13 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1C according to the third embodiment.

[0070] 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.

[0071] 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 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 30 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 30 of the support shaft 3 and the coupling mechanism 42 of the support member 4 may be omitted.

[0072] 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. 13, 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 30 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. 13, or in different directions. In that 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.

[0073] 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.

[0074] (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.

[0075] In the above embodiment, the features of the vertical axis drag type wind power generators 1A to 1C of each embodiment have been described, but the features of each embodiment may be appropriately combined, and any two or more of the first to third embodiments may be appropriately combined, or all of them may be combined. For example, the vertical axis drag type wind power generator 1B of the second embodiment may adopt the tandem structure of the third embodiment.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[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 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.

[0081] 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]

[0082] 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...auxiliary support member, 10...drag type turbine unit, 20...power generation unit, 30...Connection mechanism part, 40...Curved outer shape part, 41...Straight line outer shape part, 42...Connection mechanism part, 50...Outer wall surface part, 51...Middle wall surface part, 52...Inner wall surface part, 53...Outer end, 54...Inner edge, 55...Outer boundary, 56...Inner boundary, 60... Outer wall outer shape, 61... Intermediate wall outer shape, 62... Inner wall outer shape, 63…Straight line outline part

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 arranged symmetrically in pairs around the support shaft with a space between adjacent support members along the axial direction and in a radial direction of the support shaft, and are supported by the support members; Each of the plurality of pressure-receiving members includes As a wall surface portion extending between an outer end disposed radially outward in a plan view perpendicular to the axial direction and an inner end disposed radially inward relative to the outer end on the opposite side of the outer end with respect to the support shaft, an outer wall surface portion extending from the outer end toward a direction of travel of the pressure-receiving member when the pressure-receiving member receives fluid pressure and the support shaft and toward the support shaft, the outer wall surface portion being formed in a curved shape that bulges outward in the radial direction; an intermediate wall portion extending from the outer wall portion toward the traveling direction side and the support shaft via a curved or bent outer boundary portion and formed in a flat shape; an inner wall surface portion extending from the intermediate wall surface portion via a curved or bent inner boundary portion to the inner end disposed on the traveling direction side of the intermediate wall surface portion and formed in a flat shape, When the pair of pressure-receiving members are symmetrically disposed, the inner end of one of the pressure-receiving members is In the plan view, the first region is disposed, The first region includes: a first straight line that is parallel to the intermediate wall surface portion of one of the pressure-receiving members and is tangent to the support shaft on the side of the one of the pressure-receiving members; a second straight line that is parallel to the intermediate wall surface portion of one of the pressure-receiving members and is tangent to the support shaft on the other pressure-receiving member side; a third straight line connecting the inner boundary portion of one of the pressure-receiving members and the outer boundary portion of the other pressure-receiving member; a fourth straight line connecting the outer end of the other pressure-receiving member and the outer boundary of the other pressure-receiving member; Drag type turbine device.

2. When the pair of pressure-receiving members are symmetrically disposed, the inner end of one of the pressure-receiving members is In the plan view, the second region is disposed, The second region is the first straight line; the third straight line; a fifth straight line that is parallel to the intermediate wall surface portion of one of the pressure-receiving members and passes through a rotation central axis of the support shaft; a region surrounded by a first arc line passing through the outer boundary portion of the other pressure-receiving member and centered on the rotation central axis of the support shaft; 2. The drag turbine arrangement of claim 1.

3. When the pair of pressure-receiving members are symmetrically disposed, the inner end of one of the pressure-receiving members is In the plan view, the second region is disposed in the second region, The third region is the third straight line; the fifth straight line; The first arc line; a sixth line passing through an intersection of the fifth line and the circumscribing circle of the outer end and tangent to the support shaft on one of the pressure-receiving members; 3. A drag type turbine arrangement as claimed in claim 2.

4. When the pair of pressure-receiving members are symmetrically disposed, the inner end of one of the pressure-receiving members is In the plan view, the second region is disposed in a fourth region, The fourth region is the third straight line; the fifth straight line; the sixth straight line; The first arc line; a seventh line that passes through an intersection of the second line and the circumscribing circle of the outer end and is tangent to the support shaft on one of the pressure-receiving members; 4. A drag turbine arrangement as claimed in claim 3.

5. When the pair of pressure-receiving members are symmetrically disposed, the inner boundary portion of one of the pressure-receiving members is In the plan view, the support shaft is disposed on the opposite side to the first straight line.

2. The drag turbine arrangement of claim 1.

6. When the pair of pressure-receiving members are symmetrically disposed, the inner boundary portion of one of the pressure-receiving members is a straight line passing through the outer end of the other pressure-receiving member, the straight line being disposed on the opposite side of the support shaft with respect to an eighth straight line tangent to the support shaft on the one pressure-receiving member side, a ninth straight line connecting the outer end of the other pressure-receiving member and the outer boundary of the one pressure-receiving member, the ninth straight line being disposed on the support shaft side; 6. A drag type turbine arrangement as claimed in claim 5.

7. A drag type turbine device according to any one of claims 1 to 6, Wind, water or tidal rotating devices.

8. A drag type turbine device according to any one of claims 1 to 6, Wind, hydro or tidal generators.

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