JP7492262B2 - Magnus type thrust generating device, wind power rotating device, water power rotating device, tidal power rotating device using said Magnus type thrust generating device, and wind power generator, water power generator, tidal power generator using said Magnus type thrust generating device - Google Patents

Description

The present invention relates to a Magnus thrust generating device that uses the Magnus force generated by a roughly cylindrical blade that rotates in a fluid, a wind-powered rotating device, a hydraulic rotating device, and a tidal rotating device that use the Magnus thrust generating device, and fluid machinery such as a wind-powered generator, a hydraulic generator, and a tidal generator that use the Magnus thrust generating device.

Conventionally, devices that utilize the Magnus force generated by cylindrical blades rotating in a fluid have been known. For example, Patent Document 1 discloses a Magnus type thrust generating device (vertical axis type Magnus type wind power generating device) that includes a support member that rotates around the generator shaft and supports the cylindrical blades, and a plurality of cylindrical blades that are suspended from the support member and rotate independently, with the cylindrical blades suspended from the support member being arranged on a circumferential orbit centered on the generator shaft.

JP 2010-121518 A

The present invention aims to provide a Magnus thrust generating device capable of increasing the strength of cylindrical blades, a wind-powered rotating device, a hydro-powered rotating device, and a tidal-powered rotating device that use the Magnus thrust generating device, as well as a wind-powered generator, a hydro-powered generator, and a tidal-powered generator that use the Magnus thrust generating device.

The present invention aims to solve the above problems, and provides a Magnus thrust generating device according to one embodiment of the present invention,
A supporting housing;
a rotating unit rotatable about a first rotation axis relative to the support housing;
A plurality of cylindrical blades capable of revolving around the first rotation axis and rotating around a second rotation axis parallel to the first rotation axis ;
a support portion that is fixed to the rotating portion to be rotatable about the first rotation axis and that supports the cylindrical blade on a circumference centered on the first rotation axis;
Equipped with
The cylindrical blade is
A cylindrical blade body,
A reinforcing portion provided on the cylindrical blade body;
having
The reinforcing portion is
A reinforcing member formed in an annular shape as a whole by at least one member and installed on an inner periphery of the cylindrical blade body;
A reinforcing auxiliary member formed in an annular shape as a whole by at least one member and installed on the outer periphery of the cylindrical blade body;
has.

In addition, a wind-powered rotating device, a hydraulic rotating device, or a tidal rotating device according to one embodiment of the present invention uses the Magnus thrust generating device.

In addition, a wind power generator, a hydroelectric power generator, or a tidal power generator according to one embodiment of the present invention uses the Magnus thrust generating device.

The Magnus thrust generating device according to one embodiment of the present invention has a reinforcing part installed on the rotor body. This makes it possible to increase the strength of the cylindrical blade.

FIG. 1 is a perspective view showing an example of a vertical axis type Magnus wind power generator 1 according to an embodiment of the present invention. FIG. 1 is a front view showing an example of a vertical axis type Magnus wind power generator 1 according to an embodiment of the present invention. FIG. 1 is an exploded front view showing an example of a vertical axis type Magnus wind power generator 1 according to an embodiment of the present invention. FIG. 2 is a plan view showing an example of a cylindrical blade 4 of the vertical axis type Magnus wind power generator 1 according to the embodiment of the present invention. 1 is a cross-sectional view taken along line VV, showing an example of a vertical axis type Magnus wind power generator 1 according to an embodiment of the present invention. FIG. 1 is a cross-sectional view showing an example of a cylindrical blade 4 according to an embodiment of the present invention. 2 is a cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. FIG. 8 is an enlarged view of part A in FIG. 7 . 6 is an enlarged cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to a second embodiment of the present invention. FIG. 11 is an enlarged cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to a third embodiment of the present invention. FIG.

Specific embodiments of the present invention are described below. The embodiments are merely examples, and the present invention is not limited to these examples. In the following embodiment, a vertical axis type Magnus type wind power generator 1 using a Magnus type thrust generating device will be described as one application example of a Magnus type thrust generating device.

Figure 1 is a perspective view showing an example of a vertical axis type Magnus type wind power generator 1 according to an embodiment of the present invention. Figure 2 is a front view showing an example of a vertical axis type Magnus type wind power generator 1 according to an embodiment of the present invention. Figure 3 is an exploded front view showing an example of a vertical axis type Magnus type wind power generator 1 according to an embodiment of the present invention. Figure 4 is a plan view showing an example of a vertical axis type Magnus type wind power generator 1 according to an embodiment of the present invention. Figure 5 is a V-V line cross-sectional view showing an example of a vertical axis type Magnus type wind power generator 1 according to an embodiment of the present invention.

The vertical axis type Magnus wind power generator 1 includes a support housing 2 that is installed on an installation surface S, a generator 21 and a gearbox 22 that are arranged inside the support housing 2, a rotating unit 3 that is connected to the generator 21 via the gearbox 22 and can rotate around a first rotation axis O1 that is perpendicular to the installation surface S, a plurality of cylindrical blades 4 that can revolve around the first rotation axis O1 and rotate around a second rotation axis O2 that is parallel to the first rotation axis O1, a plurality of straightening plates 5 and a plurality of shielding plates 7 that form each group together with the plurality of cylindrical blades 4 and whose longitudinal direction 5L is arranged along the axial direction of the cylindrical blades 4 of each group, and a support unit 6 that is fixed to the rotating unit 3 and can rotate around the first rotation axis O1, and supports the cylindrical blades 4 on a circumference C1 centered on the first rotation axis O1 for each group of cylindrical blades 4, straightening plates 5, and shielding plates 7, and supports the straightening plates 5 and shielding plates 7 on the opposite side to the traveling direction when the cylindrical blades 4 revolve.

In the description of this embodiment, "parallel" does not only mean completely parallel, but also means approximately parallel, allowing for a degree of misalignment that does not impair the function of the vertical-axis Magnus wind power generator 1. Similarly, "vertical" does not only mean completely vertical, but also means approximately vertical, allowing for a degree of misalignment that does not impair the function of the vertical-axis Magnus wind power generator 1. In addition, the vertical-axis Magnus wind power generator 1 according to this embodiment will be described as having two cylindrical blades 4 and two straightening plates 5, as shown in FIG. 1, and the number of sets of cylindrical blades 4, straightening plates 5, and shielding plates 7 is two.

The support housing 2 is a cylindrical housing arranged coaxially with the first rotation axis O1. The upper part 30 of the rotating part 3 protrudes from the upper part of the support housing 2, and a bearing unit 20 is provided to support the rotating part 3 so that the first rotation axis O1 is perpendicular to the installation surface S. The support housing 2 may be a truss-shaped housing.

The rotating part 3 is composed of a rotating shaft supported by the bearing unit 20, and the support part 6 is fixed to the peripheral wall of the upper part 30 that protrudes from the upper surface of the bearing unit 20.

The generator 21 is connected to the rotating part 3 via the speed-up gear 22, and is configured to generate electricity by converting the rotational energy generated when the rotating part 3 rotates into electrical energy. The generator 21 may also be connected directly to the rotating part 3 without the speed-up gear 22.

If the rated output of the Magnus vertical axis wind turbine 1 is assumed to be, for example, about 10 kW, the external dimensions of the cylindrical blades 4 are about 10 m in length and 1 m in diameter, and the external dimensions of the baffle vane 5 are about 10 m in length, 1.6 m in width, and 0.5 to 3 mm in thickness.

The multiple cylindrical blades 4 are supported on the circumference C1 by the support portion 6, so that, as shown in FIG. 5, on a plane perpendicular to the first rotation axis O1 and the second rotation axis O2, the multiple second rotation axes O2 are arranged on the circumference C1 at a predetermined interval (cylindrical blade support interval) on the circumference C1. In this embodiment, the two second rotation axes O2 for the two cylindrical blades 4 are arranged on the circumference C1 so as to face each other across the first rotation axis O1.

The cylindrical blade 4 includes a cylindrical blade body 40 formed in a cylindrical shape, and the cylindrical blade body 40 includes an upper end (one end) 40a arranged on the upper side in the vertical direction and a lower end (other end) 40b arranged on the lower side in the vertical direction as both ends in the axial direction of the cylindrical blade 4 parallel to the second rotation axis O2. The cylindrical blade 4 also includes a disk-shaped blade end plate 41 arranged at each of the upper end 40a and the lower end 40b and larger than the diameter of the cylindrical blade 4, a cylindrical blade motor (rotation drive unit) 42 that rotates (spins) the cylindrical blade 4 clockwise R2 around the second rotation axis O2, and an upper rotation transmission shaft part (one end side rotation transmission shaft part) 42a and a lower rotation transmission shaft part (other end side rotation transmission shaft part) 42b that are connected to the cylindrical blade body 40 and arranged coaxially with the second rotation axis O2 at the upper end 40a and the lower end 40b, respectively.

The straightening vane 5 is formed in a flat plate shape, and has an upper end (one end) 50a and a lower end (the other end) 50b as both ends in the longitudinal direction 5L of the straightening vane 5, and has a front end edge 50c arranged on the cylindrical blade 4 side and close to the cylindrical blade 4, and a rear end edge 50d arranged on the opposite side of the front end edge 50c and far from the cylindrical blade 4 as both edges in the width direction 5W of the straightening vane 5. The straightening vane 5 also has an inner surface 50e arranged on the first rotation axis O1 side and an outer surface 50f opposite the inner surface 50e as surfaces perpendicular to the plate thickness direction of the straightening vane 5.

The straightening plate 5 has a tapered portion 53 at the rear edge 50d of the straightening plate 5, in which the width of the straightening plate 5 narrows as it approaches the upper end 50a and the lower end 50b of the straightening plate 5. The tapered portion 53 may be linear, or may be a curved shape that draws a parabola, or may be a combination of a linear shape and a curved shape. In this embodiment, the straightening plate 5 has tapered portions 53 of the same linear shape at both ends 50a and 50b of the straightening plate 5, but the straightening plate 5 may have tapered portions 53 of different shapes at both ends 50a and 50b of the straightening plate 5, or may have a tapered portion 53 only at either the upper end 50a or the lower end 50b.

The shielding plate 7 is formed in a flat plate shape like the straightening plate 5, and the longitudinal direction of the shielding plate 7 is arranged parallel to the longitudinal direction 5L of the straightening plate 5. The shielding plate 7 has, as both edges in the width direction of the shielding plate 7, a base end edge 70a arranged on the straightening plate 5 side, and a tip end edge 70b on the opposite side to the base end edge 70a.

The straightening plate 5 and the shielding plate 7 are supported by the support 6, and are arranged on the opposite side of the traveling direction of the cylindrical blade 4 on a plane perpendicular to the first rotation axis O1 and the second rotation axis O2, as shown in FIG. 5. The straightening plate 5 is arranged so that the front end edge 50c and the rear end edge 50d extend in the opposite direction to the traveling direction of the cylindrical blade 4. The shielding plate 7 is arranged on the front end edge 50c side of the straightening plate 5 and is supported so as to stand on the first rotation axis O1 side (inner surface 50e side) with respect to the straightening plate 5. At this time, a gap is formed between the cylindrical blade 4 and the front end edge 50c of the straightening plate 5, and a gap is formed between the cylindrical blade 4 and the tip edge 70b of the shielding plate 7. The specific configuration of the straightening plate 5 and the shielding plate 7 will be described later.

For each set of cylindrical blade 4, baffle plate 5, and shield plate 7, the support portion 6 supports both ends 40a, 40b of the cylindrical blade 4 in the axial direction so that the cylindrical blade 4 is positioned on a circumference C1 centered on the first rotation axis O1, and supports the baffle plate 5 and shield plate 7 so that the baffle plate 5 and shield plate 7 are positioned on the opposite side to the direction of travel when the cylindrical blade 4 revolves clockwise R1 around the first rotation axis O1.

The manner in which the support part 6 supports the cylindrical blade 4 on the circumference C1 includes not only the case in which the support part 6 supports the cylindrical blade 4 with the second rotation axis O2, which is the center of the cylindrical blade 4, overlapping with the circumference C1 as shown in FIG. 5, but also the case in which a misalignment between the second rotation axis O2 and the circumference C1 is permitted to an extent that does not impair the function of the vertical axis type Magnus wind power generator 1, and the support part 6 supports the cylindrical blade 4 with, for example, the circular cross section of the cylindrical blade 4 overlapping with the circumference C1. The specific configuration of the support part 6 will be described later.

When the vertical axis type Magnus wind power generator 1 receives wind (air flow) from a specific direction while the cylindrical blade motor 42 is rotating (spinning) the cylindrical blade 4 clockwise R2 around the second rotation axis O2, a Magnus force is generated in the cylindrical blade 4. The Magnus force generated in the cylindrical blade 4 acts in a direction that causes the cylindrical blade 4 to revolve clockwise R1 around the first rotation axis O1.

At this time, the straightening vane 5 controls the magnitude of the Magnus force depending on the position of the cylindrical blade 4 relative to the wind direction. Specifically, when the cylindrical blade 4 is on the upwind side, the straightening vane 5 is in an area (flow deceleration side) where the wind direction and the rotation direction of the cylindrical blade 4 are opposite. Therefore, although the straightening vane 5 obstructs the wind flow on the flow deceleration side, it does not significantly reduce the Magnus force generated in the cylindrical blade 4, so the Magnus force acts as a rotational force that revolves the cylindrical blade 4.

On the other hand, when the cylindrical blade 4 is on the downwind side, the baffle vane 5 is in the area (flow acceleration side) where the wind direction and the rotation direction of the cylindrical blade 4 coincide. Therefore, the baffle vane 5 reduces the Magnus force generated in the cylindrical blade 4 by obstructing the wind flow on the flow acceleration side, thereby preventing the Magnus force from acting to counteract the rotational force that revolves the cylindrical blade 4.

As described above, the cylindrical blade 4 revolves clockwise R1 while the Magnus force generated on the cylindrical blade 4 is controlled by the baffle vane 5, causing the rotating part 3 to rotate clockwise, generating electricity with the generator 21 connected to the rotating part 3.

The support portion 6 is arranged on the first rotation axis O1 side with respect to the straightening plate 5, and includes a straightening plate support portion 61 that supports the straightening plate 5 and the shielding plate 7 along the longitudinal direction 5L of the straightening plate 5 between both ends 50a, 50b of the straightening plate 5 in the longitudinal direction 5L, a first connecting arm portion 62 that connects an upper end portion (one end portion) 610a of the straightening plate support portion 61 to the rotating portion 3, and a lower end portion (the other end portion) 610b of the straightening plate support portion 61 to the rotating portion 3. A second connecting arm 63 that connects the first connecting arm 62 and the second connecting arm 63 is provided for each set (two sets in this embodiment) of the cylindrical wing 4, the straightening plate 5, and the shielding plate 7. A first cylindrical wing support part (one end support part) 64 that supports the upper end 40a of the cylindrical wing 4 and is connected to the first connecting arm 62 and a second cylindrical wing support part (other end support part) 65 that supports the lower end 40b of the cylindrical wing 4 and is connected to the second connecting arm 63 are provided for each set (two sets in this embodiment) of the cylindrical wing 4, the straightening plate 5, and the shielding plate 7.

The straightening plate support portion 61 is arranged along the longitudinal direction 5L of the straightening plate 5 between both ends 50a, 50b and includes a straightening plate support arm portion 610 that supports the straightening plate 5, and a plurality of straightening plate reinforcing members 611 that are arranged at a predetermined interval (reinforcement interval) with respect to the longitudinal direction 5L of the straightening plate 5 and at a predetermined angle (right angle in this embodiment) with respect to the longitudinal direction 5L between both edge portions 50c, 50d of the straightening plate 5 in the width direction 5W of the straightening plate 5, and support the straightening plate 5 and the shielding plate 7.

The first cylindrical wing support section 64 includes an oscillating shaft support structure 640 that supports the axis of the cylindrical wing 4 in a swingable state at the upper end 40a side of the cylindrical wing 4, a first cylindrical wing support arm section 641 that connects the tip end 620b of the first connecting arm section 62 to the oscillating shaft support structure 640, and a second cylindrical wing support arm section 642 that connects the bent section 620c of the first connecting arm section 62 to the oscillating shaft support structure 640. The oscillating shaft support structure section 640 includes a first bearing (not shown) that supports a rotating shaft provided at the upper end 40a of the cylindrical wing 4, etc.

The second cylindrical wing support section 65 is provided with a fixed support structure 650 that supports the cylindrical wing motor 42 while fixing the axis of the cylindrical wing 4 at the lower end 40b side of the cylindrical wing 4, a first cylindrical wing support arm section 651 that connects the tip 630b of the second connecting arm section 63 to the fixed support structure section 650, and a second cylindrical wing support arm section 652 that connects the bent section 630c of the second connecting arm section 63 to the fixed support structure section 650. The fixed support structure section 650 is provided with a second bearing (not shown) that supports the rotating shaft provided at the lower end 40b of the cylindrical wing 4, and supports the cylindrical wing motor 42 so that the rotational driving force of the cylindrical wing motor 42 is transmitted to the rotating shaft of the cylindrical wing 4.

The support section 6 further includes a third connecting arm section 66 that connects the intermediate section 610c of the baffle support arm section 610 relative to the longitudinal direction 5L of the baffle 5 to the adjacent section 661 adjacent to the fixed end section 620a on the rotating section 3 side of the first connecting arm section 62 and the fixed end section 630a on the rotating section 3 side of the second connecting arm section 63, for each set (two sets in this embodiment) of the cylindrical blade 4, the baffle 5, and the shielding plate 7.

Each arm part (baffle support arm part 610, first connecting arm part 62, second connecting arm part 63, first cylindrical wing support arm part 641, 651, second cylindrical wing support arm part 642, 652, and third connecting arm part 66) of the support part 6 is formed as a tubular member having any cross-sectional shape such as a circle, an ellipse, a polygon, or a plate-like member having any cross-sectional shape such as an L-shape, an H-shape, an I-shape, or a wire member using, for example, a metal material such as steel, stainless steel, aluminum, an aluminum alloy, titanium, or a titanium alloy, or a resin material such as a carbon fiber reinforced resin or a glass fiber reinforced resin. Note that the outer shape, cross-sectional shape, cross-sectional area, and material of each arm part of the support part 6 may be changed depending on the location where each arm part is arranged and the load supported by each part.

In addition, each arm section of the support section 6 is composed of multiple composite arm members in which multiple arm sections are integrally formed, and each composite arm member is joined via a joint that is formed by any joining method (welding, adhesive bonding, screw fixing, press fitting, rivets, pin connections, joints, etc.).

In this embodiment, for example, the first connecting arm section 62, the second connecting arm section 63, the first cylindrical wing support arm sections 641, 651, and the second cylindrical wing support arm sections 642, 652 are integrally formed to constitute the first composite arm member 60A. The baffle support arm section 610 and the third connecting arm section 66 are integrally formed to constitute the second composite arm member 60B. The first composite arm member 60A is joined to the rotating section 3 via joints 600A and 600B. The second composite arm member 60B is joined to the first composite arm member 60A via joints 601A to 601C.

Figure 6 is a cross-sectional view showing an example of a cylindrical blade 4 according to an embodiment of the present invention.

The cylindrical wing 4 comprises a cylindrical wing body 40 and disk-shaped wing end plates 41 that are arranged at the upper end 40a and lower end 40b of the cylindrical wing 4 and are larger in diameter than the cylindrical wing 4. The upper end fixing portion 45 and the lower end fixing portion 46 are connected by a connecting portion 43. The cylindrical wing body 40 is also reinforced by a reinforcing portion 44.

The connecting portion 43 includes at least a connecting member 431 made of a material with high tensile strength and excellent resilience. For example, the material of the connecting member 431 may be a metal material such as carbon steel, high-strength steel, or stainless steel, or a resin material such as carbon fiber reinforced resin, glass fiber reinforced resin, or aramid fiber. In particular, carbon fiber reinforced plastic is preferable because of its light weight. The connecting member 431 is a linear member having any cross-sectional shape such as a circle, ellipse, or polygon, and may be a single high-strength wire, or may be a thick-diameter cable made by winding multiple small-diameter wires together in a spiral.

The connecting member 431 is preferably installed on the second rotation axis O2 of the cylindrical blade body 4. Since it is difficult to install the connecting member 431 exactly on the second rotation axis O2, it may be considered that the connecting member 431 is installed on the second rotation axis O2 if there is a small error, for example, an error of about the diameter of the connecting member 431.

The reinforcing portion 44 is made of, for example, a metal material such as steel, stainless steel, aluminum, aluminum alloy, titanium, or titanium alloy, or a resin material such as carbon fiber reinforced resin or glass fiber reinforced resin. The cross section of the reinforcing portion 44 is preferably an arbitrary shape such as an L-shape, H-shape, I-shape, T-shape, or Z-shape.

At least one reinforcing section 44 is provided on the cylindrical blade body 40, and at least one is preferably provided at the center of the cylindrical blade body 40 in the direction of the second rotation axis O2. Since it is difficult to provide the reinforcing section 44 exactly at the center of the cylindrical blade body 40, for example, if there is an error of about 10% with respect to the length of the cylindrical blade 40 in the direction of the second rotation axis O2, it may be considered that the reinforcing section 44 is provided at the center of the cylindrical blade body 40 in the direction of the second rotation axis O2.

In this embodiment, three reinforcing parts 44 are installed at equal intervals in the direction of the second rotation axis O2 of the cylindrical blade main body 40, but the number of reinforcing parts 44 is not limited to three, and at least one may be installed. It is preferable that at least one of the reinforcing parts 44 is installed in the center of the cylindrical blade main body 40 in the direction of the second rotation axis O2.

Since the cylindrical blade body 40 is most susceptible to radial buckling near the center in the direction of the second rotation axis O2, the strength of the cylindrical blade body 40 can be increased by placing the reinforcing part 44 at the center of the cylindrical blade body 40. Furthermore, by placing the reinforcing part 44 at the center of the cylindrical blade body 40, the resonant frequency of the cylindrical blade 4 can be increased, making it less likely that abnormal vibrations that could cause damage will occur. Therefore, it is preferable that the number of reinforcing parts 44 is an odd number. Note that when multiple reinforcing parts 44 are placed, they may be shaped differently depending on the installation location.

By providing the reinforcing parts 44, the strength of the cylindrical blade body 40 can be increased without increasing the thickness. Furthermore, by providing multiple reinforcing parts 44, the strength of the cylindrical blade body 40 can be further increased. Furthermore, by providing multiple reinforcing parts 44 at equal intervals, the strength of the cylindrical blade body 40 can be further increased.

By installing the reinforcing parts 44, the strength of the cylindrical blade main body 40 can be increased even if the thickness of the cylindrical blade main body 40 is small. Therefore, compared to increasing the thickness of the cylindrical blade main body 40 to increase the strength, it is possible to increase the strength while minimizing the increase in the weight and moment of inertia of the cylindrical blade main body 40, and the cylindrical blade 4 can rotate smoothly. In addition, by increasing the resonant frequency of the cylindrical blade 4, abnormal vibrations that can cause damage are less likely to occur. When installing multiple reinforcing parts 44, either an odd number or an even number may be used.

Figure 7 is a cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to the first embodiment of the present invention. Figure 8 is a cross-sectional view taken along line VIII-VIII in Figure 7. Figure 9 is an enlarged view of part A in Figure 7.

The reinforcing portion 44 has a reinforcing member 441 installed on the inner circumference of the cylindrical blade main body 40, and a reinforcing auxiliary member 442 installed on the outer circumference of the cylindrical blade main body 40. Note that the reinforcing auxiliary member 442 does not have to be installed. The reinforcing member 441 in the first embodiment is formed in a ring shape as a whole from three members arranged at equal intervals in the circumferential direction. Note that it is sufficient that the reinforcing member 441 is formed in a ring shape from at least one member.

The reinforcing member 441 of the first embodiment has a mounting base 441a attached to the inner circumference of the cylindrical blade main body 40, a flange portion 441b extending from one end of the mounting base 441a toward the inner circumference, an extension portion 441c extending from the inner circumference side of the flange portion 441b in a direction parallel to the second rotation axis O2 opposite to the mounting portion 441a, and a connection portion 441d extending from the circumferential end of the flange portion 441b in the same direction as the mounting base 441a.

The mounting base 441a is attached to the inner circumference of the cylindrical blade main body 40 by bolts, rivets, adhesives, welding, or a combination of these. The reinforcing part 44 in the first embodiment is attached by bolts and nuts, with the mounting base 441a and the reinforcing auxiliary member 442 sandwiching the cylindrical blade main body 40. The reinforcing auxiliary member 442 in the first embodiment is formed into a ring shape as a whole from three members arranged at equal intervals in the circumferential direction. Note that the reinforcing auxiliary member 442 only needs to be formed into a ring shape from at least one member.

The flange portion 441b extends from one end of the mounting base 441a toward the inner periphery. This increases the strength of the reinforcing member 441. The extension portion 441c extends from the inner periphery of the flange portion 441b in a direction parallel to the second rotation axis O2, opposite the mounting portion 441a. This increases the strength of the reinforcing member 441.

The reinforcing member 441 has multiple notches 441e formed from the mounting base 441a to a part of the flange 441b. By forming the notches 441e, distortion when formed into a ring is reduced, and the reinforcing member 441 can be attached accurately to the inner circumference of the cylindrical blade main body 40. In addition, if the cylindrical blade main body 40 and the reinforcing member 441 are made of different materials, thermal stress caused by the difference in thermal expansion coefficients can be alleviated. It is preferable that the multiple notches 441e are equally spaced, as this reduces distortion and allows for more accurate attachment. In addition, it is preferable to provide a stress concentration prevention portion 441f such as a hole at the tip of the multiple notches 441e.

The connection portion 441d is a portion that connects the circumferential ends of adjacent flange portions 441b when the reinforcing member 441 is formed in multiple pieces. The connection portion 441d in the first embodiment is connected by a bolt and a nut. Note that while FIG. 7 shows the connection by two sets of connecting members 441g such as a bolt and a nut, the connection may be by at least one set of connecting members 441g. However, multiple sets can provide a stable connection without rotating around the connecting member 441g. The connection portion 441d may also be connected by riveting, gluing, welding, or a combination thereof.

In this way, by providing the reinforcing portion 44, the strength of the cylindrical wing 4 can be increased even if the thickness of the cylindrical wing main body 40 is small, so the weight and moment of inertia of the cylindrical wing 4 are smaller than when the thickness of the cylindrical wing main body 40 is increased to increase the strength, and the cylindrical wing 4 can rotate smoothly. In addition, by increasing the resonant frequency of the cylindrical wing 4, abnormal vibrations that could cause damage are less likely to occur.

Figure 10 is an enlarged cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to a second embodiment of the present invention.

The reinforcing member 441 of the second embodiment is formed into an integral ring shape using a resin material such as carbon fiber reinforced resin or glass fiber reinforced resin. The reinforcing member 441 of the second embodiment has an attachment base 441a that is attached to the inner circumference of the cylindrical blade main body 40, and a flange portion 441b that extends from the attachment base 441a to the inner circumference side.

In the second embodiment, the reinforcing portion 44 has an attachment base 441a attached to the cylindrical blade body 40 by adhesive. A reinforcing auxiliary member 442 may be further provided to connect the inner periphery of the attachment base 441a to the cylindrical blade body 40.

In this way, the reinforcing portion 44 of the second embodiment does not have a reinforcing auxiliary member 442 installed on the outer periphery of the cylindrical blade main body 40, so that the air resistance during rotation of the cylindrical blade 4 can be reduced. In addition, the reinforcing member 441 of the second embodiment is formed in a ring shape from a single member, so that the number of parts of the cylindrical blade 4 can be reduced, and the weight can be reduced.

The reinforcing member 441 of the second embodiment may have a plurality of notches 441e formed therein, as in the first embodiment. The reinforcing member 441 of the second embodiment may also be formed from a plurality of members. In this case, the reinforcing member 441 of the second embodiment may have a connection portion 441d formed therein that connects adjacent members.

Figure 11 is an enlarged cross-sectional view showing an example of a reinforcing portion 44 of a cylindrical blade 4 according to a third embodiment of the present invention.

The reinforcing member 441 of the third embodiment has a mounting base 441a that is attached to the inner circumference of the cylindrical blade main body 40, and a flange portion 441b that extends from the upper and lower ends of the mounting base 441a toward the inner circumference. That is, the cross section of the reinforcing member 441 of the third embodiment is formed into a concave or C-shape with an opening facing inward. The other configurations are the same as those of the first embodiment.

In this way, the reinforcing member 441 of the third embodiment has a concave or C-shaped cross section with an opening facing inward, which increases the strength of the reinforcing member 441 itself.

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.

For example, in the above embodiment, the cylindrical blade 4 is described as revolving clockwise R1 around the first rotation axis O1, but it may also revolve counterclockwise. In that case, the direction in which the cylindrical blade 4 rotates is changed from clockwise R2 to counterclockwise, and the arrangement of the baffle vane 5 is changed accordingly.

In addition, in the above embodiment, the number of sets of cylindrical blades 4, straightening plates 5, and shielding plates 7 is described as two, but the number of sets of cylindrical blades 4, straightening plates 5, and shielding plates 7 may be changed as appropriate, and the vertical axis type Magnus wind power generator 1 may be provided with three or more sets of cylindrical blades 4, straightening plates 5, and shielding plates 7.

In the above embodiment, the first rotation axis O1 and the second rotation axis O2 are described as being arranged perpendicular to the installation surface S, i.e., parallel to the vertical direction, but they may be arranged diagonally to the vertical direction or perpendicular to the vertical direction, i.e., horizontally.

In the above embodiment, a vertical axis type Magnus wind power generator 1 using a Magnus thrust generator was described as one application example of a Magnus thrust generator. However, instead of connecting the rotating part 3 to the generator 21, the rotating part 3 may be connected to a rotating machine such as a pump to create a wind power rotating device using a Magnus thrust generator.

In the above embodiment, the vertical axis type Magnus wind power generator 1 using the Magnus thrust generator has been described as one application example of the Magnus thrust generator. However, instead of using wind (air flow) as the energy source, a water current, wave, tidal current, etc. may be used to create a hydroelectric or tidal power generator using the Magnus thrust generator. Furthermore, instead of connecting the rotating part 3 to the generator 21, the rotating part 3 may be connected to a rotating machine such as a pump to create a hydroelectric or tidal power rotating device using the Magnus thrust generator.

The Magnus thrust generating device of the present invention has a rotor with a cylindrical rotor body and a reinforcing part installed on the rotor body, which increases the strength of the cylindrical blade and makes it possible to efficiently obtain rotational force by the Magnus force generated in the cylindrical blade, and can be used as a wind-powered rotating device, a hydraulic rotating device, and a tidal rotating device, as well as a wind-powered generator, a hydraulic generator, and a tidal generator.

1... Vertical axis type Magnus wind turbine (Magnus thrust generator),
2... supporting housing, 20... bearing unit, 21... generator, 22... speed increaser, 3... rotating part,
4...Cylindrical blade, 40...Cylindrical blade main body,
40a: upper end (one end), 40b: lower end (the other end),
41... wing tip portion, 41a... wing upper end plate, 41b... wing lower end plate,
42...Cylindrical blade motor, 43...Connecting member,
44... Reinforcing portion, 441... Reinforcing member, 441a... Mounting base portion, 441b... Flange portion,
442...reinforcing auxiliary member,
45: upper end fixing portion, 46: lower end fixing portion,
5... current plate, 6... support portion, 7... shielding plate,
O1: first rotation axis, O2: second rotation axis, S: installation surface

Claims (7)

A supporting housing;
a rotating unit rotatable about a first rotation axis relative to the support housing;
A plurality of cylindrical blades capable of revolving around the first rotation axis and rotating around a second rotation axis parallel to the first rotation axis;
a support portion that is fixed to the rotating portion to be rotatable about the first rotation axis and that supports the cylindrical blade on a circumference centered on the first rotation axis;
Equipped with
The cylindrical blade is
A cylindrical blade body,
A reinforcing portion provided on the cylindrical blade body;
having
The reinforcing portion is
A reinforcing member formed in an annular shape as a whole by at least one member and installed on an inner periphery of the cylindrical blade body;
A reinforcing auxiliary member formed in an annular shape as a whole by at least one member and installed on the outer periphery of the cylindrical blade body;
having
Magnus thrust generator. The reinforcing member is
An attachment base attached to an inner periphery of the cylindrical blade body;
a flange portion extending from one end of the mounting base toward an inner periphery;
an extension portion extending from an inner circumferential side of the flange portion in a direction parallel to the second rotation axis opposite to the mounting base;
a connecting portion extending from a circumferential end of the flange portion in the same direction as the mounting base;
2. The Magnus thrust generating device according to claim 1 , The reinforcing member is
An attachment base attached to an inner periphery of the cylindrical blade body;
Flange portions extending from upper and lower ends of the mounting base toward the inner periphery;
2. The Magnus thrust generating device according to claim 1 , The Magnus thrust generating device according to claim 1 , wherein at least one of the reinforcing portions is provided at a center of the cylindrical wing main body in the second rotation axis direction. The Magnus thrust generating device according to claim 1 , wherein a plurality of the reinforcing portions are provided at equal intervals in the second rotation axis direction. A wind-powered rotating device, a water-powered rotating device, or a tidal-powered rotating device using the Magnus thrust generating device according to any one of claims 1 to 5. A wind power generator, a hydroelectric power generator, or a tidal power generator using the Magnus type thrust generating device according to any one of claims 1 to 6.

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