JP7475101B1 - Drag-type turbine device, wind-powered rotating device, hydro-powered rotating device, and tidal-powered rotating device using said drag-type turbine device, and wind-powered generator, hydro-powered generator, and tidal-powered generator using said drag-type turbine device - Google Patents

Abstract

[Problem] To provide a drag type turbine device that can improve both the performance and strength of the device. [Solution] The drag type turbine device 1A includes a support shaft 3, a plurality of support members 4 fixed to the support shaft 3 at a predetermined interval in the axial direction of the support shaft 3, and a plurality of pressure-receiving members 5 that are arranged around the support shaft 3 with a predetermined distance between the plurality of support members 4 along the axial direction and spaced apart from each other in the radial direction of the support shaft 3 and are supported by the plurality of support members 4. In a plan view perpendicular to the axial direction, the pressure-receiving member 5 has, as wall surface portions extending between an outer end 53 and an inner end 54, an outer wall surface portion 50 that extends from the outer end 53 toward the traveling direction and the support shaft and is formed in a convex shape that bulges outward in the radial direction, an intermediate wall surface portion 51 that extends from the outer wall surface portion 50 toward the traveling direction and the support shaft and is formed in a convex or flat shape, and an inner wall surface portion 52 that extends from the intermediate wall surface portion 51 to the inner end 54 and is formed in a convex or flat shape. [Selected Figure] FIG.

Description

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-powered generator, a hydroelectric generator, and a tidal-powered generator that use the drag-type turbine device.

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 with multiple blades having a C-shaped (arcuate) cross section, and Patent Document 2 discloses a Bach-type wind turbine with multiple blades having a J-shaped cross section.

JP 2006-152937 A Japanese Patent Application Laid-Open No. 6-323237

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 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 a configuration without a support shaft, the strength of the blades must be increased to ensure the strength of the device, which makes the blades heavier and unavoidably increases the cost of the device. On the other hand, if a support shaft is provided at the rotation center of the drag-type wind power generator, the presence of the support shaft places restrictions on the blade design, and the airflow flowing from the blade moving from the upwind side to the downwind side to the blade moving from the downwind side to the upwind side is obstructed, resulting in a decrease in power generation efficiency, making it difficult to achieve both improved performance and strength of the device.

Therefore, the present invention aims to provide a drag-type turbine device that makes it possible to achieve both improved performance and strength of the 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-powered generator, a hydroelectric generator, and a tidal-powered generator that use the drag-type turbine device.

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 fixed to the support shaft at predetermined intervals in the axial direction of the support shaft;
a plurality of pressure-receiving members that are disposed around the support shaft in a state spaced apart from each other along the axial direction and in a radial direction of the support shaft and are supported by the plurality of 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 support shaft rotates under the fluid pressure and toward the support shaft, the outer wall surface portion being formed in a convex shape that bulges outward in the radial direction;
an intermediate wall portion extending from the outer wall portion toward the support shaft in the traveling direction via a curved or bent outer boundary portion and formed in a convex or flat shape that gradually bulges outward in the radial direction from the outer wall portion;
The inner wall portion extends from the intermediate wall portion via a curved or bent inner boundary portion to the inner end located on the traveling direction side of the intermediate wall portion, and is formed in a convex or flat shape that bulges radially outward.

A wind-powered rotating device, a hydroelectric rotating device, or a tidal rotating device according to one embodiment of the present invention uses the drag-type turbine device.A wind-powered generator, a hydroelectric generator, or a tidal generator according to one embodiment of the present invention uses the drag-type turbine device.

According to one embodiment of the drag-type turbine device of the present invention, each of the multiple pressure-receiving members has a wall portion extending between an outer end arranged radially outward in a plan view perpendicular to the axial direction of the support shaft and an inner end arranged on the opposite side of the outer end with respect to the support shaft and radially inward from the outer end, the wall portion having an outer wall portion extending from the outer end toward the direction of travel and the support shaft and formed in a convex shape that bulges radially outward, an intermediate wall portion extending from the outer wall portion toward the direction of travel and the support shaft and formed in a convex or flat shape that bulges radially outward more gently than the outer wall portion, and an inner wall portion extending from the intermediate wall portion to an inner end arranged on the direction of travel side of the intermediate wall portion and formed in a convex or flat shape that bulges radially outward.

As a result, the multiple pressure-receiving members are supported by multiple support members fixed to the support shaft, so that the entire device is configured to form a monocoque structure and is arranged to form gaps between the support shaft and the multiple pressure-receiving members. 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 inner wall surface portion, and flows out from the inner end. This makes it possible to achieve both improved performance and strength of the device.

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. 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. 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. FIG. 2 is a schematic diagram showing an example of the arrangement of a vertical axis drag type wind power generator 1A according to the first embodiment and each parameter. 11 is a distribution diagram showing the output coefficient Cp in a first parameter example of the pressure-receiving member 5. FIG. FIG. 13 is a distribution diagram showing the output coefficient Cp in a second parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the output coefficient Cp in a third parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the output coefficient Cp in a fourth parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the output coefficient Cp in a fifth parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the output coefficient Cp in a sixth parameter example of the pressure-receiving member 5. 13 is a distribution diagram showing a power coefficient ratio Cp_ratio in a first parameter example of the pressure-receiving member 5. FIG. FIG. 13 is a distribution diagram showing the power coefficient ratio Cp_ratio in a second parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the power coefficient ratio Cp_ratio in a third parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the power coefficient ratio Cp_ratio in a fourth parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the power coefficient ratio Cp_ratio in a fifth parameter example of the pressure-receiving member 5. FIG. 13 is a distribution diagram showing the power coefficient ratio Cp_ratio in a sixth parameter example of the pressure-receiving member 5. 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. FIG. 11 is a partially exploded perspective view showing an example of a vertical axis resistance type wind power generator 1B according to a second embodiment. 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. 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. FIG. 13 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1D according to a fourth embodiment. FIG. 13 is a cross-sectional view showing an example of a vertical axis resistance type wind power generator 1D according to a fourth embodiment. FIG. 13 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1E according to a fifth embodiment.

Specific embodiments of the present invention are described below. The embodiments are merely examples, and are not limited to these examples. In the following embodiments, a vertical axis drag type wind power generator 1 (1A-1E) using a drag type turbine device will be described as one application example of a 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 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.

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.

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 fixed to the support shaft 3 at a predetermined interval L1 with respect to the axial direction Da of the support shaft 3, and a plurality of pressure-receiving members 5 supported by the plurality of support members 4, which are arranged around the support shaft 3 along the axial direction Da and spaced apart in the radial directions Dr1 and Dr2 of the support shaft 3. The vertical-axis drag-type wind power generator 1A functions as a drag-type wind turbine, with the support shaft 3 rotating in the traveling direction Dt (in this embodiment, clockwise (see FIG. 3)) as the pressure-receiving members 5 receive wind pressure (fluid pressure) due to wind (air flow) flowing from a predetermined direction.

Each component of the vertical axis drag type wind turbine 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 the above-mentioned various materials, 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.

In this embodiment, the vertical axis resistance type wind turbine 1A is mainly described as having a vertical axis resistance type wind turbine 1A with four support members 4 as the multiple support members 4, as shown in FIG. 1, and with a pair of pressure-receiving members 5 arranged symmetrically with respect to the support axis 3 between each of the four support members 4 as the multiple pressure-receiving members 5, i.e., with a total of six pressure-receiving members 5.

The support housing 2 is a cylindrical housing arranged coaxially with the support shaft 3. The support housing 2 is provided with a power generation unit 20 at its upper portion, which 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 of the support shaft 3 (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.

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.

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 Figure 2, the support shaft 3 may be composed of a single shaft member, or may be composed of multiple (three in this embodiment) connected shaft members having a length approximately equal to the interval L1.

Each of the multiple support members 4 is, for example, made of a flat plate material having a predetermined shape in plan view, and is 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. At that time, each of the multiple support members 4 is fixed to the support shaft 3 via a connecting and fixing member 30 (not shown in FIG. 2) 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 (details will be described later).

In addition, among the multiple support members 4, at least the support members 4 arranged at both ends (in the example of FIG. 1, the first and fourth support members 4 from the bottom) may be fixed to the support shaft 3 via the connecting and fixing members 30, and some or all of the intermediate support members 4 arranged between both ends (in the example of FIG. 1, the second and third support members 4 from the bottom) may or may not be fixed to the support shaft 3 via the connecting and fixing members 30. In this case, 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.

Each of the multiple support members 4 has a planar shape, in a planar view perpendicular to the axial direction Da (see Figure 3), which includes a pair of outer wall surface contour portions 40 formed along the outer wall surface portions 50 (details of which will be described later) that each of the pair of pressure-receiving members 5 has, and a pair of linear contour portions 41 formed to linearly connect the pair of outer wall surface contour portions 40.

Each of the pair of pressure-receiving members 5 has an outer wall surface portion 50, an intermediate wall surface portion 51, and an inner wall surface portion 52 as wall surface portions 50-52 extending between an outer end 53 arranged on the radially outer side Dr1 in a plan view perpendicular to the axial direction Da (see FIG. 3) and an inner end 54 arranged on the opposite side of the outer end 53 with respect to the support shaft 3 and radially inner than the outer end 53. The outer wall surface portion 50 has an outer boundary portion 55 arranged at the boundary portion between the outer wall surface portion 50 and the intermediate wall surface portion 51, and an inner boundary portion 56 arranged at the boundary portion between the intermediate wall surface portion 51 and the inner wall surface portion 52. Each of the pair of pressure-receiving members 5 also has an outer mounting portion 57, an intermediate mounting portion 58, and an inner mounting portion 59 as mounting portions 57-59 for respectively mounting both ends of the pressure-receiving member 5 in the axial direction Da to the support member 4.

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

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

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

The intermediate wall surface portion 51 and the inner wall surface portion 52 are arranged so as to be convex toward the radially outer 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. 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 outer 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.

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. If the outer boundary 55 is curved, it may be formed in the same curved shape as the outer wall surface 50 or the intermediate wall surface 51, and if the inner boundary 56 is curved, it may be formed in the same curved shape as the intermediate wall surface 51.

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

The wall portions 50-52 may also 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 using any fixing method (welding, adhesive, screw fixing, press fitting, rivet, pin connection, joint, 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.

In this embodiment, as shown in FIG. 3, the wall surface portions 50-52 of each of the pair of pressure receiving members 5 are integrally formed, and the outer wall surface portion 50 is formed in an arc-shaped curved surface shape with a radius of curvature R in a plan view, the intermediate wall surface portion 51 and the inner wall surface portion 52 are formed in a planar shape, and the outer boundary portion 55 and the inner boundary portion 56 are formed in a curved shape (arc-shaped curved surface shape). 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 the inner boundary portion 56 of each of the pair of pressure receiving members 5 and the outer circumferential surface of the support shaft 3. Moreover, each of the pair of pressure-receiving members 5 is disposed such that the intermediate wall surface portion 51 and the inner wall surface portion 52 are convex toward the radially outward side Dr1 via the inner boundary portion 56, so that the distance 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 distance between the pair of pressure-receiving members 5 becomes wider as they approach the support shaft 3 side.

In addition, when a pair of pressure-receiving members 5 are arranged symmetrically, the inner end 54 of one pressure-receiving member 5 is preferably arranged 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 of rotation O1 of the support shaft 3 in a plan view perpendicular to the axial direction Da, and more preferably arranged on the traveling direction side Dt of a line connecting the outer end 53 of the other pressure-receiving member 5 and the inner boundary portion 56 (dashed line in Figure 4 described below). This allows the width of the passage formed between the pair of pressure-receiving members 5 to be appropriately set.

Furthermore, in this embodiment, each of the multiple support members 4 has, as its planar shape, a pair of outer wall surface contour portions 40 formed along the arc-shaped outer wall surface portion 50, and a pair of straight line contour portions 41 formed to connect the pair of outer wall surface contour portions 40. Therefore, each of the multiple support members 4 is formed, in planar view, with two straight line portions arranged in parallel and two curved line portions connecting both ends of the two straight line portions in a semicircular shape.

The outer mounting portion 57, the intermediate mounting portion 58, and the inner mounting portion 59 are formed so as to face the radially outer side Dr1 perpendicularly to the outer wall surface portion 50, the intermediate wall surface portion 51, and the inner wall surface portion 52, respectively, and are in surface contact with the flat plate surface of the support member 4, and are fixed to the support member 4 by any fixing method (welding, adhesive, screw fixing, rivet, joint, etc.). The mounting portions 57-59 may be integrally formed with the wall surface portions 50-52, for example, by bending, or may be formed as separate parts from the wall surface portions 50-52. The outer mounting portion 57 may be formed so as to face the radially inner side Dr2 perpendicularly to the outer wall surface portion 50. In this embodiment, the outer mounting portion 57 of each of the pair of pressure-receiving members 5 is formed as a separate part from the outer wall surface portion 50, and the intermediate mounting portion 58 and the inner mounting portion 59 are formed integrally with the intermediate mounting portion 58 and the inner mounting portion 59.

When the vertical axis drag type wind power generator 1A having the above configuration receives wind from a predetermined direction (windward), the wind passes between the outer end 53 of the leeward pressure receiving member 5 and the inner end 54 of the windward pressure receiving member 5, and flows between the pair of pressure receiving members 5 along the outer wall surface portion 50 of the leeward pressure receiving member 5, so that a rotational force (resistance force) acts on the leeward pressure receiving member 5 to rotate it in the direction of travel Dt. Then, the wind that flows between the pair of pressure receiving members 5 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 peripheral 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, in this order, and then flows out along the outer wall surface portion 50 of the windward pressure receiving member 5. Furthermore, when the windward-side pressure-receiving member 5 directly receives 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 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.

In this way, a rotational force acts on the leeward pressure-receiving member 5 to rotate it in the direction of travel Dt, and this 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 alternating between the leeward and windward sides, causing the support shaft 3 to rotate continuously, and electricity to be generated by the power generation unit 20 connected to the support shaft 3.

(Parameter range of pressure-receiving member 5)
FIG. 4 is a schematic diagram showing an example of the layout and each parameter of the vertical axis drag type wind power generator 1A according to the first embodiment.

In a plan view perpendicular to the axial direction Da of the support shaft 3, the parameters for specifying the arrangement and shape of each part of the vertical axis drag type wind power generator 1A are as follows:
D is the diameter (outer end diameter) of a circumscribing circle of the outer end 53 centered on the rotation central axis O1 of the support shaft 3,
d is the diameter of the support shaft 3 (support shaft diameter),
R is the radius of curvature of the outer wall portion 50,
s is 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 is the shortest distance between the pressure-receiving member 5 and the outer circumferential surface of the support shaft 3 (second shortest distance),
θ is the angle between the intermediate wall portion 51 and the inner wall portion 52,
The above parameters (D, d, R, s, t) correspond to the dimensions of each part, and therefore can take positive values. Note that, when the outer wall surface portion 50 is a circular arc curved surface, the radius of curvature R is a parameter corresponding to the radius of curvature of the outer wall surface portion 50. However, when the outer wall surface portion 50 is a polygonal surface, the radius of curvature R may be treated as a parameter corresponding to the radius of curvature of the circumscribed arc of the outer wall surface portion 50.

Figures 5A to 5F are distribution diagrams showing the output coefficient Cp when the parameters of the pressure-receiving member 5 are changed. Figures 6A to 6F are distribution diagrams showing the output coefficient ratio Cp_ratio when the parameters of the pressure-receiving member 5 are changed.

The output coefficient Cp of the vertical axis drag type wind power generator 1A is defined as follows.
Cp = P / (0.5 x ρ x U ³ x 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.

The power coefficient ratio Cp_ratio of the vertical axis drag type wind power generator 1A is defined as follows.
Cp_ratio=Cp/Cp_max
Here, Cp_max is the maximum value of the output coefficient Cp when the parameters are changed under a specific condition.

The peripheral speed ratio λ of the vertical axis drag type wind power generator 1A is defined as follows.
λ=V/U
where V is the rotational speed (circumferential speed) of the outer end 53.

5A to 5F and 6A to 6F are distribution diagrams obtained by simulating the power coefficient Cp and the power coefficient ratio Cp_ratio when the peripheral speed ratio λ is 0.8. The power coefficient Cp and the power coefficient ratio Cp_ratio were calculated when the two parameters, the first shortest distance s and the second shortest distance t, were changed under the conditions for implementing the simulation, in which the ratio (D:d:R) of the outer end diameter D, the support shaft diameter d, and the curvature radius R satisfied the following six set ratios:
(1) First set ratio: D=1, d/D=0.1, R/D=0.15
(2) Second set ratio: D=1, d/D=0.1, R/D=0.20
(3) Third set ratio: D=1, d/D=0.1, R/D=0.25
(4) Fourth preset ratio: D=1, d/D=0.05, R/D=0.15
(5) Fifth preset ratio: D=1, d/D=0.05, R/D=0.20
(6) Sixth preset ratio: D=1, d/D=0.05, R/D=0.25

In the first to sixth set ratios, the outer end diameter D is used as the reference and the other parameters (support shaft diameter d, radius of curvature R) are normalized (1:d/D:R/D). For example, in the first set ratio, the support shaft diameter d is 10% of the outer end diameter D, and the radius of curvature R is 15% of the outer end diameter D.

In Figures 5A to 5F and 6A to 6F, the first parameter ratio s/R is assigned to the horizontal axis and the second parameter ratio (d+2t)/D is assigned to the vertical axis, with lighter colored areas indicating larger output coefficient Cp and output coefficient ratio Cp_ratio and darker colored areas indicating smaller output coefficient Cp and output coefficient ratio Cp_ratio. Therefore, it was found that the output coefficient Cp and output coefficient ratio Cp_ratio become stably large when the first parameter ratio s/R and the second parameter ratio (d+2t)/D satisfy the following conditional expressions (A1), (B), (C) and (D) (preferably (A2), (B), (C) and (D), more preferably (A3), (B), (C) and (D)).

The conditional expressions (A1), (B), (C) and (D) for the first parameter ratio s/R and the second parameter ratio (d+2t)/D are determined as follows: The region Z1 determined by the conditional expressions (A1), (B), (C) and (D) is specified for each of the six set ratios as shown by the frame lines in Figures 5A to 5F and 6A to 6F.
0.2≦(s/R)≦0.9 (A1)
(d+2t)/D≦(R/D)×(s/R)−(R/D)×0.5+0.2 (B)
(d+2t)/D>(R/D)×(s/R) (C)
(d+2t)/D>d/D (D)

As preferred conditional expressions, the conditional expressions (A2), (B), (C) and (D) for the first parameter ratio s/R and the second parameter ratio (d+2t)/D are defined as follows: The region Z2 defined by the conditional expressions (A2), (B), (C) and (D) is specified for each of the six set ratios described above, as shown by the frame lines in Figures 5A to 5F and 6A to 6F.
0.2≦(s/R)≦0.8 (A2)
(d+2t)/D≦(R/D)×(s/R)−(R/D)×0.5+0.2 (B)
(d+2t)/D>(R/D)×(s/R) (C)
(d+2t)/D>d/D (D)

As more preferable conditional expressions, the conditional expressions (A3), (B), (C) and (D) for the first parameter ratio s/R and the second parameter ratio (d+2t)/D are defined as follows: The region Z3 defined by the conditional expressions (A3), (B), (C) and (D) is specified for each of the six set ratios described above, as shown by the frame lines in Figures 5A to 5F and 6A to 6F.
0.4≦(s/R)≦0.6 (A3)
(d+2t)/D≦(R/D)×(s/R)−(R/D)×0.5+0.2 (B)
(d+2t)/D>(R/D)×(s/R) (C)
(d+2t)/D>d/D (D)

The above conditional expressions (B), (C), and (D) are modifications of the following conditional expressions (B1), (C1), and (D1), respectively. Therefore, the regions Z1 to Z3 can be determined using conditional expressions (B1), (C1), and (D1) that are equivalent to the conditional expressions (B), (C), and (D), instead of the conditional expressions (B), (C), and (D).
d + 2t ≦ s − 0.5 × R + 0.2 × D (B1)
d+2t>s (C1)
t>0 (D1)

The above conditional formula (C1) indicates that the distance s 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 is smaller than the value (d + 2t) obtained by adding the support shaft diameter d and twice the distance t between the pressure receiving member 5 and the support shaft 3. This specifies that in each of the pair of pressure receiving members 5, the intermediate wall surface portion 51 and the inner wall surface portion 52 are arranged so as to be convex toward the radially outer side Dr1 via the inner boundary portion 56, and the intermediate wall surface portion 51 and the inner wall surface portion 52 form an obtuse angle (90° < θ < 180°) toward the support shaft 3 side, so that the distance 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. In other words, 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 form an obtuse angle (90°<θ<180°) on the support shaft 3 side, and the distance (=d+2t) on the inner boundary portion 56 side is wider than the distance (=s) on the inner end 54 side. As a result, the pair of pressure-receiving members 5 are arranged to avoid the support shaft 3 without causing a decrease in the output coefficient Cp, while ensuring the strength of the device by the support shaft 3, thereby achieving both improved performance and strength of the device. Moreover, the above conditional formula (D1) indicates that the second shortest distance t is a positive value.

The conditional expressions for the first parameter ratio s/R and the second parameter ratio (d+2t)/D may be such that the combination of the lower limit values and the upper limit values in the conditional expressions (A1) to (A3) is changed as appropriate while satisfying the conditional expressions (B1), (C1), and (D1) (or the conditional expressions (B), (C), and (D)). For example, instead of the conditional expressions (A1) to (A3), any of the following conditional expressions (A4), (A5), and (A6) may be combined. Also, in the conditional expressions (A1) to (A6), the lower limit values may be changed to 0.3 and the upper limit values may be changed to 0.7.
0.2≦(s/R)≦0.6 (A4)
0.4≦(s/R)≦0.9 (A5)
0.4≦(s/R)≦0.8 (A6)

Moreover, the conditional expression for the first parameter ratio s/R and the second parameter ratio (d+2t)/D may further include the following conditional expression (B2):
(d+2t)/D≦0.2 (B2)

Furthermore, the ratios of the outer end diameter D, the support shaft diameter d, and the curvature radius R are not limited to the six set ratios described above and may be changed as appropriate. For example, when normalized with the outer end diameter D (=1) as a reference, if the first parameter ratio s/R and the second parameter ratio (d+2t)/D satisfy any of the above conditional expressions, and the support shaft diameter d is within the range of the following conditional expression (E) and the curvature radius R is within the range of the following conditional expression (F), an improvement in the power coefficient Cp is expected. In this case, the circumferential speed ratio λ is not limited to 0.8, and an improvement in the power coefficient Cp is also expected in the same manner, for example, in a range of 0.6 to 0.8.
0.05≦d/D≦0.10 (E)
0.15≦R/D≦0.25 (F)

Here, the parameters (D, d, R, s, t) of the vertical axis drag type wind power generator 1A are normalized by the outer end diameter D (=1) while the other parameters (support shaft diameter d, radius of curvature R, first shortest distance s, second shortest distance t) are normalized by the outer end diameter D (=1). However, the specific numerical values (actual dimensions) when the parameters (D, d, R, s, t) satisfy the conditional expressions are realized in a number of examples. For example, when the parameters (D, d, R, s, t) are defined by the conditions (s/R=0.5, (d+2t)/D=0.1) shown by the open black circles in Figures 5A to 5F in the second set ratio, the parameters are specified by the following (S), and the actual dimensions include a number of examples as shown in the following (S1) to (S3).
(S) D = 1, d/D = 0.1, R/D = 0.2, s/D = 0.1, t/D = 0.025
(S1) D = 1 m, d = 0.1 m, R = 0.2 m, s = 0.1 m, t = 0.025 m
(S2) D = 5 m, d = 0.5 m, R = 1 m, s = 0.5 m, t = 0.125 m
(S3) D = 10 m, d = 1 m, R = 2 m, s = 1 m, t = 0.25 m

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 is, in a plan view perpendicular to the axial direction Da of the support shaft 3, an outer end 53 arranged on the radially outer side Dr1, and an inner end 54 arranged on the opposite side of the outer end 53 with respect to the support shaft 3 and radially inner than the outer end 53 Dr2, as wall surface portions 50-52 that extend from the outer end 53 toward the traveling direction side Dt and the support shaft 3, and are arranged on the radially outer side D The shaft 50 has an outer wall surface portion 50 formed in a convex shape bulging in the direction r1, an intermediate wall surface portion 51 extending from the outer wall surface portion 50 toward the travel direction side Dt and toward the support shaft 3, and formed in a convex or flat shape bulging radially outward Dr1 more gently than the outer wall surface portion 50, and an inner wall surface portion 52 extending from the intermediate wall surface portion 51 to an inner end 54 positioned on the travel direction side Dt of the intermediate wall surface portion 51, and formed in a convex or flat shape bulging radially outward Dr1.

As a result, the multiple pressure-receiving members 5 are supported by the multiple support members 4 fixed to the support shaft 3, so that the entire device is configured to form a monocoque structure and is arranged to form gaps between the support shaft 3 and the multiple pressure-receiving members 5. 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 inner wall surface portion 52, and flows out from the inner end 54. This makes it possible to achieve both improved performance and strength of the device.

In addition, since the support member 4 is formed in a parallel straight line by a pair of straight outer portions 41, for example, when manufacturing or transporting the vertical axis resistance type wind power generator 1A, the straight outer portion 41 can be placed horizontally as a temporary placement surface, or 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 generator facing each other.

Second Embodiment
Fig. 7 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1B according to the second embodiment. Fig. 8 is a partially exploded 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.

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

Each of the multiple support members 4 has a planar shape, in a planar view perpendicular to the axial direction Da (see Figure 9), which includes a pair of outer wall surface contour portions 40 formed along the outer wall surface portions 50 of each of the pair of pressure-receiving members 5, a pair of intermediate wall surface contour portions 42 formed along the intermediate wall surface portions 51 of each of the pair of pressure-receiving members 5, a pair of inner wall surface contour portions 43 formed along the inner wall surface portions 52 of each of the pair of pressure-receiving members 5, and a pair of straight line contour portions 44 formed to connect the pair of outer wall surface contour portions 40 and the pair of inner wall surface contour portions 43, respectively.

As described above, in the vertical axis drag type wind power generator 1B according to this embodiment, the support member 4 is formed to fit along 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 support member 4 in a plan view can be reduced. This makes it possible to reduce the weight of the device and reduce snow accumulation on the support member 4, thereby preventing damage due to snow accumulation.

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

The vertical axis drag type wind power generator 1C according to this embodiment differs from the first and second embodiments in that it includes support members 4A and 4B having different shapes in plan view as the multiple support members 4 (four in this embodiment), but the other basic configurations are the same as those of the first and second embodiments. The following mainly describes the features of this embodiment.

Of the four support members 4, the two support members 4A arranged at both ends of the axial direction Da are composed of the same support members 4 as in the first embodiment, and the two support members 4B arranged between these support members 4A are composed of the same support members 4 as in the second embodiment.

As described above, the vertical axis resistance type wind turbine 1C of this embodiment can be configured by combining support members 4A and 4B having different planar shapes.

Fourth Embodiment
Fig. 11 is an overall perspective view showing an example of a vertical axis drag type wind power generator 1D according to the fourth embodiment. Fig. 12 is a cross-sectional view showing an example of a vertical axis drag type wind power generator 1D according to the fourth embodiment.

The vertical axis drag type wind power generator 1D according to this embodiment differs from the first embodiment in that each of the multiple pressure receiving members 5 (two in this embodiment) has an inner wall surface portion 52 that can rotate relative to the intermediate wall surface portion 51, but the other basic configuration is the same as that of the first embodiment. The following mainly describes the features of this embodiment.

11 and 12, each of the pair of pressure-receiving members 5 has an outer wall surface portion 50, an outer boundary portion 55, and an intermediate wall surface portion 51 that are integrally formed, and is fixed to a plurality of support members 4 via an outer mounting portion 57 and an intermediate mounting portion 58. The integrally formed outer wall surface portion 50, outer boundary portion 55, and intermediate wall surface portion 51 support the inner wall surface portion 52 via the inner boundary portion 56.

The inner boundary portion 56 includes a pivot support mechanism 560 that supports the inner wall portion 52 rotatably around the inner wall portion pivot axis O2 that is parallel to the support shaft 3. The pivot support mechanism 560 is composed of parts that allow the position of the inner end 54 to be changed around the inner wall portion pivot axis O2 in a plan view perpendicular to the axial direction Da, and is composed of, for example, hinges and elastic parts. The pivot support mechanism 560 also includes a biasing member 561 that biases the inner wall portion 52 to rotate toward the traveling direction side Dt, and a stopper member 562 that restricts the rotation of the inner wall portion 52 biased by the biasing member 561. The biasing member 561 functions as an adjustment part that adjusts the position of the inner end 54 by the biasing force when biasing the inner wall portion 52.

The inner wall surface portion 52 is supported by the intermediate wall surface portion 51 via the pivot support mechanism portion 560. The inner end 54 is positioned at the initial position P1 when the inner wall surface portion 52 is biased by the biasing member 561 and abuts against the stopper member 562. When a centrifugal force exceeding the biasing force of the biasing member 561 acts on the inner wall surface portion 52, the inner wall surface portion 52 is rotated in the opposite direction to the traveling direction, and the inner end 54 is moved to, for example, an intermediate position P2 located on the extension line of the intermediate wall surface portion 51 or an open position P3 located on the opposite side to the traveling direction from the extension line of the intermediate wall surface portion 51, depending on the magnitude of the centrifugal force. The open position P3 is the limit position of the inner end 54 when the inner wall surface portion 52 is rotated in the opposite direction to the traveling direction, and may be set inside the support member 4 or outside the support member 4 as shown in FIG. 12. In this case, the open position P3 may be set to a position where the angle between the inner wall surface portion 52 and the intermediate wall surface portion 51 is 90 degrees, for example. The rotation support mechanism 560 may also include a restricting member (not shown) that restricts the inner end 54 from moving beyond the open position P3. Furthermore, the rotation support mechanism 560 may also include a weight member (weight) on the inner end 54 side of the inner wall surface portion 52 and on the radially inner side Dr2 side in order to adjust the centrifugal force acting on the inner wall surface portion 52.

The pivot support mechanism 560 may be configured to automatically adjust the position of the inner end 54 by providing an actuator such as a motor or cylinder instead of or in addition to the biasing member 561. The pivot support mechanism 560 may also be configured to provide a magnet on the inner wall portion 52 or the stopper member 562 instead of or in addition to the biasing member 561, so that the inner wall portion 52 is positioned at the initial position P1 by magnetic force. In this case, when a centrifugal force exceeding the magnetic force of the magnet acts on the inner wall portion 52, the inner wall portion 52 is pivoted in the opposite direction to the traveling direction, and the inner end 54 is moved to the intermediate position P2 or the open position P3 depending on the magnitude of the centrifugal force. In addition, the pivoting support mechanism 560, regardless of whether or not a biasing member 561, an actuator, and a magnet are included, allows the position of the inner end 54 to be manually adjusted, and may, for example, fix the position of the inner end 54 to the initial position P1, the intermediate position P2, or the open position P3, or may fix the position of the inner end 54 to any position between the initial position P1 and the open position P3.

As described above, according to the vertical axis drag type wind power generator 1D of this embodiment, the pivotal support mechanism 560 rotatably supports the inner wall surface portion 52 around the inner wall surface portion pivot axis O2, so that the position of the inner end 54 can be adjusted. Therefore, the rotational force generated in the pressure-receiving member 5 can be changed according to the position of the inner end 54, and the closer the position of the inner end 54 is to the intermediate position P2 or the open position P3, the smaller the rotational force generated in the pressure-receiving member 5 becomes, so that the vertical axis drag type wind power generator 1D can function as an aerodynamic brake.

In addition, when the rotation of the vertical axis drag type wind generator 1D is stopped by minimizing the rotational torque when receiving wind from a specified direction, such as when the vertical axis drag type wind generator 1D is feathering, the rotational force generated in the pressure-receiving member 5 can be suppressed by moving the inner wall portion 52 to the intermediate position P2 or the open position P3, thereby stabilizing the posture during feathering.

Furthermore, since the pivoting support mechanism 560 includes a biasing member 561 that biases the inner wall surface 52, when a centrifugal force exceeding the biasing force of the biasing member 561 acts on the inner wall surface 52 due to, for example, a strong wind or storm, the position of the inner end 54 is rotated to the opposite side of the traveling direction and approaches the intermediate position P2 or the open position P3, thereby reducing the rotational force generated in the pressure-receiving member 5. This makes it possible to prevent over-rotation of the vertical axis drag type wind turbine 1D.

Fifth Embodiment
FIG. 13 is an overall perspective view showing an example of a vertical axis resistance type wind power generator 1E according to the fifth embodiment.

The vertical axis drag type wind turbine generator 1E according to this embodiment differs from the first embodiment in that it has a tandem structure with multiple drag type turbine units 10, with a support shaft 3, multiple support members 4 (three in this embodiment), and multiple pressure-receiving members 5 (four (two pairs) in this embodiment) forming one drag type turbine unit 10. The other basic configuration is the same as that of the first embodiment. The following will focus on the features of this embodiment.

The support shaft 3 is provided with a coupling mechanism 31 that detachably couples adjacent support shafts 3 when the support shafts 3 of the drag turbine units 10 are arranged coaxially. The support member 4 is provided with a coupling mechanism 45 that detachably couples adjacent support members 4 when the support shafts 3 of the drag turbine units 10 are arranged coaxially. The coupling mechanism 31 of the support shaft 3 and the coupling mechanism 45 of the support member 4 couple the support shafts 3 or the support members 4 by any coupling method (screw fixing, rivet, pin coupling, joint, etc.), and may be, for example, detachable with a tool or detachable with one touch without the need for tools. One of the coupling mechanism 31 of the support shaft 3 and the coupling mechanism 45 of the support member 4 may be omitted.

In this embodiment, the vertical axis drag type wind power generator 1E 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 part 31 of the support shaft 3 and the connection mechanism part 45 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. 11, 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 composed of 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.

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

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.

In the above embodiment, the features of the vertical axis drag wind power generators 1A to 1E 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 fifth embodiments may be appropriately combined, or all of them may be combined. For example, the vertical axis drag wind power generators 1B and 1C of the second or third embodiment may be equipped with the pivot support mechanism 560 of the fourth embodiment, and the vertical axis drag wind power generators 1B to 1D of the second to fourth embodiments may adopt the tandem structure of the fifth embodiment.

In the above embodiment, a case has been described in which the multiple support members 4 include three or four support members 4, but the number of support members 4 may be two or five or more.

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

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

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 it. 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, preventing damage caused by snow accumulation.

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., parallel to the vertical direction, but it may be arranged diagonally to the vertical direction, or perpendicular to the vertical direction, i.e., horizontally.

In the above embodiment, the vertical axis drag type wind generators 1A to 1E 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 create a wind power rotating device using a drag type turbine device.

In the above embodiment, the vertical axis drag type wind generators 1A to 1E 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, water currents, waves, tides, etc. may be used to create 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 create a hydroelectric rotating device or a tidal power rotating device using a drag type turbine device.

1A to 1E: Vertical axis drag type wind power generator (drag type turbine device), 2: Support housing,
3...support shaft; 4, 4A, 4B...support member; 5...pressure-receiving member;
10...drag type turbine unit, 20...power generation unit,
30...connecting and fixing member, 31...connecting mechanism part,
40: outer wall surface contour portion, 41: straight line contour portion, 42: intermediate wall surface contour portion,
43: Inner wall surface contour portion, 44: Straight line contour portion, 45: Connection mechanism portion, 50: Outer wall surface portion, 51: Intermediate wall surface portion, 52: Inner wall surface portion, 53: Outer end, 54: Inner end, 55: Outer boundary portion, 56: Inner boundary portion,
57: outer mounting portion, 58: intermediate mounting portion, 59: inner mounting portion,
560: Rotation support mechanism, 561: Pressing member, 562: Stopper member

Claims (8)

A support shaft that is rotatably supported;
A plurality of support members fixed to the support shaft at predetermined intervals in the axial direction of the support shaft;
a plurality of pressure-receiving members that are disposed around the support shaft in a state spaced apart from each other along the axial direction and in a radial direction of the support shaft and are supported by the plurality of support members;
A pair of the pressure-receiving members is disposed between each of the plurality of support members symmetrically with respect to the support shaft,
Each of the plurality of pressure-receiving members includes
In a plan view perpendicular to the axial direction, a wall surface portion is provided extending between an outer end disposed radially outward 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 and 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 flat shape and extends from the intermediate wall surface portion through 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;
Drag type turbine device. The intermediate wall portion and the inner wall portion are
In the plan view, the inner boundary portion is disposed so as to be convex toward the radially outward side, thereby forming an obtuse angle toward the support shaft,
The pair of pressure-receiving members include
The pressure-receiving members are disposed such that a distance between the pair of pressure-receiving members in the plan view is relatively narrow on the inner end side and relatively wide on the inner boundary portion side.
2. The drag turbine arrangement of claim 1. Each of the pair of pressure-receiving members is
In the plan view, the following conditional expressions (A1), (B1), and (C1) are satisfied:
3. A drag type turbine arrangement as claimed in claim 2.
0.2≦(s/R)≦0.9 (A1)
d + 2t ≦ s − 0.5 × R + 0.2 × D (B1)
d+2t>s (C1)
however,
D is the diameter of the circumscribing circle of the outer end,
d is the diameter of the support shaft,
R is the radius of curvature of the outer wall portion,
s is the shortest distance between the intermediate wall surface portion of one of the pressure-receiving members and the inner end of the other pressure-receiving member,
t is the shortest distance between the pressure-receiving member and the outer circumferential surface of the support shaft,
It is. The inner boundary portion is
a rotation support mechanism that supports the inner wall portion rotatably around an inner wall portion rotation axis that is parallel to the support axis,
The inner wall portion is
The pivot support mechanism is supported by the intermediate wall surface portion.
A drag type turbine arrangement according to any one of claims 1 to 3. The rotation support mechanism includes:
a biasing member that biases the inner wall surface portion so as to rotate in the traveling direction,
The inner wall portion is
The inner wall surface portion is positioned at an initial position by being biased by the biasing member,
When a centrifugal force exceeding the biasing force of the biasing member acts on the inner wall surface portion, the inner wall surface portion is rotated from the initial position in the opposite direction to the traveling direction.
5. A drag type turbine arrangement as claimed in claim 4. The outer wall portion, the outer boundary portion, and the intermediate wall portion are
Formed integrally,
5. A drag type turbine arrangement as claimed in claim 4. 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,
A drag type turbine arrangement according to any one of claims 1 to 3. Among the plurality of support members, two support members arranged at both ends in the axial direction have a shape different from that of the other support member arranged between the two support members in the plan view.
A drag type turbine arrangement according to any one of claims 1 to 3.

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