Rotating blade and device equipped with same

Abstract

Provided is a rotary wing that is unlikely to be deformed by fluid. A rotary wing 1 comprises: a hub 10; a first blade 20, a second blade 30, and a third blade 40, being a plurality of blades which each have one end connected to the hub 10 and are provided so as to be curved around the hub 10; and a plurality of linear reinforcing parts provided between at least radially adjacent ones of the blades on one side and / or the other side along the rotational axis of the hub 10. Each of the plurality of reinforcing parts has a straight line shape, and the axial distance of the reinforcing part between the blades radially adjacent to each other is at most 1 / 2 of the radial distance thereof, or a plurality of the reinforcing parts 51, 52, 53, 61, 62, 63 are curved. The plurality of blades are unlikely to be deformed by fluid.

Description

[Technical Field]

[0001] The present invention relates to a rotor blade. [Background technology]

[0002] Natural energy is used to rotate rotors and generate electricity from the rotation, or conversely, electricity is used to rotate rotors and create a flow.

[0003] Patent Document 1, in claim 1 and Figures 4A to 5, discloses a rotor unit for a wind turbine, in which the rotor blades have a spiral shape around a central axis and extend along the central axis. Patent Document 2, in paragraph 0056 and Figures 1A to 2C, discloses a funnel-shaped propeller in which each of the propeller blades is configured in a spiral or volute shape centered on the central axis. Patent Document 3, in paragraphs 0004, 0006, 0014, and Figure 1, discloses a horizontal-axis rotor in which fluid moving toward the blade tip is significantly bent in the backward direction from the middle to the blade tip to prevent it from passing outside the blade's rotation diameter, thereby improving rotational efficiency. Meanwhile, Patent Document 4, in Figure 1, discloses a cooling fan in which a second ring concentric with the boss is provided between the first ring of blades and the boss to increase rigidity between the first ring of blades and the boss. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2013-526671 [Patent Document 2] US Patent Application Publication No. 2011 / 0311363 [Patent Document 3] Japanese Patent Application Publication No. 2018-91281 [Patent Document 4] Japanese Patent Application Laid-Open No. 2008-240564 Summary of the Invention [Problem to be solved by the invention]

[0005] As disclosed in Patent Documents 1 to 3, curved blades or wings have been considered, and some of these have been put to practical use, but there is a problem in that the blades or wings are easily deformed.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a rotor in which a plurality of blades that are curved and connected to a hub are less likely to be deformed by a fluid. [Means for solving the problem]

[0007] The above objectives are achieved through the following concepts: The rotor according to the first concept of the present invention comprises: Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, Each of the plurality of reinforcing portions has a linear shape, and the reinforcing portions between adjacent blades in the radial direction have an axial distance that is ½ or less of the radial distance, or A plurality of the reinforcing portions, each of which is curved; The plurality of reinforcing portions prevent the blade from deforming.

[0008] A rotor according to a second concept of the present invention is the rotor according to the first concept of the present invention, each of the plurality of blades is curved in a first direction around the rotation axis of the hub when viewed from the one direction side; each of the plurality of reinforcing portions is curved in a second direction around the rotation axis of the hub when viewed from the one direction side; The first orientation is opposite to the second orientation.

[0009] A rotor according to a third concept of the present invention is a rotor according to the first concept of the present invention, wherein each of the multiple reinforcing parts is connected to each of the multiple blades at one or more points.

[0010] A rotor according to a fourth concept of the present invention is a rotor according to the third concept of the present invention, wherein each of the multiple reinforcing parts is connected to one of the multiple blades at a point farthest from the hub.

[0011] A rotor according to the fifth concept of the present invention is a rotor according to the first concept of the present invention, wherein an endless ring portion is provided across the blades on at least one of the one side or the opposite side to which the reinforcing portions are respectively attached.

[0012] A rotor according to a sixth concept of the present invention is the rotor according to the fifth concept of the present invention, wherein a portion of the base end side of each of the plurality of reinforcing portions is connected to the ring portion.

[0013] A rotor according to a seventh concept of the present invention is the rotor according to the first concept of the present invention, wherein a portion of the base end side of each of the plurality of reinforcing portions is connected to the hub.

[0014] A rotor according to an eighth concept of the present invention is a rotor according to any one of the first to seventh concepts of the present invention, each of the plurality of blades includes a blade body portion whose end on the one direction side or whose end on the opposite direction side, as viewed from the one direction side, is formed around the hub in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral; The width of the blade body parallel to the rotation axis of the hub is uniform around the hub.

[0015] A rotor according to a ninth concept of the present invention is a rotor according to the eighth concept of the present invention, wherein each of the plurality of blades is connected to the blade main body and includes a tip portion whose end on the one side or the end on the opposite side, as viewed from the one side, is equidistant from the hub.

[0016] A rotor according to a tenth concept of the present invention is the rotor according to the first concept of the present invention, Each of the plurality of blades has: a blade body portion whose end on the one side or the end on the opposite side, as viewed from the one side, is formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral around the hub; an extension portion provided on a side of the blade body not connected to the hub, the extension portion having a width parallel to the rotation axis of the hub that varies around the rotation axis of the hub; a base portion provided on either the one side or the opposite side of the extension portion; It is composed of At least one of the plurality of reinforcing portions is connected to the base portion at a point farthest from the hub.

[0017] The rotor according to the 11th concept of the present invention is a rotor according to the 10th concept of the present invention, wherein the portion of the reinforcing portion connected to the base portion and the portion connected to the blade main body portion are not misaligned in the direction of the rotational axis of the hub.

[0018] A rotor according to a twelfth concept of the present invention is a rotor according to the first concept of the present invention, At least two of the plurality of blades each have: a blade body portion whose end on the one side or the end on the opposite side, as viewed from the one side, is formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral around the hub; an extension portion provided on a side of the blade body not connected to the hub, the extension portion having a width parallel to the rotation axis of the hub that varies around the rotation axis of the hub; a base portion provided on either the one side or the opposite side of the extension portion; The invention comprises: At least two of the plurality of reinforcing portions are connected to the base portion at a location farthest from the hub, One of the pedestals is connected to the other pedestal. [Effects of the Invention]

[0019] A rotor according to a first concept of the present invention includes a hub, a plurality of blades, each connected at one end to the hub and curved around the hub, and a plurality of linear reinforcing portions provided between adjacent blades in the radial direction on at least one side or the other side of the hub along the rotation axis of the hub, where each of the reinforcing portions is linear and the axial distance between adjacent blades is equal to or less than half the radial distance, or each of the reinforcing portions is curved, making the blades less likely to deform due to fluid. Here, the reinforcing portions connecting the blades together prevent the blades from warping, preventing deformation of the curved surface due to centrifugal force caused by the rotation of the blades and, as a result, increasing the rigidity of the blades.

[0020] In a rotor according to the second concept of the present invention, each of the multiple blades is curved in a first direction around the rotation axis of the hub when viewed from one side, and each of the multiple reinforcing portions is curved in a second direction around the rotation axis of the hub when viewed from the one side, and since the first direction is opposite to the second direction, the reinforcing portions are arranged in the opposite direction to the direction in which the multiple blades deform, and deformation of the multiple blades is easily suppressed.

[0021] In the rotor according to the third concept of the present invention, each of the multiple reinforcing parts is connected to each of the multiple blades at one or more points, so that the effect of the weight of the multiple reinforcing parts on the multiple blades is small and deformation of the multiple blades is suppressed.

[0022] In the rotor according to the fourth concept of the present invention, each of the multiple reinforcing parts is connected to one of the multiple blades at the point farthest from the hub, and therefore the reinforcing parts reinforce the parts of each blade that are most susceptible to deformation.

[0023] In the rotor according to the fifth concept of the present invention, the blades on at least one side or the opposite side to which the reinforcing parts are respectively attached are provided with an endless ring part that spans the blades, so that the parts of each blade closer to the axis of rotation are reinforced by the ring part, and the parts farther from the axis of rotation are reinforced by the reinforcing parts, thereby providing efficient reinforcement.

[0024] In the rotor according to the sixth concept of the present invention, a portion of the base end of each of the multiple reinforcing parts is connected to the ring part, so that the portion of the base end of each reinforcing part and the nearby area can dissipate force in the direction of the arrangement of the ring part, thereby providing efficient reinforcement.

[0025] In the rotor according to the seventh concept of the present invention, a portion of the base end of each of the multiple reinforcing parts is connected to the hub, thereby reducing the load on the blade compared to when a portion of the base end of each of the multiple reinforcing parts is connected to the blade.

[0026] In a rotor according to an eighth concept of the present invention, each of the multiple blades includes a blade body portion whose end on one side or the end on the opposite side, as viewed from one side, is formed in one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, or a hyperbolic spiral shape around the hub, and the width of the blade body portion parallel to the rotation axis of the hub is uniform around the hub, allowing for efficient use of space in the rotation axis direction, which is particularly effective when space in that direction is limited. This facilitates rotor transportation and inventory management.

[0027] In the rotor according to the ninth concept of the present invention, each of the multiple blades is connected to the blade body and includes a tip portion at the end on one side or the end on the opposite side when viewed from one side, which is equidistant from the hub, thereby enabling more efficient transfer of rotational force from the fluid to the rotor, or force from the rotor to the fluid.

[0028] In a rotor according to the tenth concept of the present invention, each of the multiple blades includes a blade main body portion, the end of which on one side or the end on the opposite side of the blade, when viewed from one side, being formed in any of the following shapes: a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, or a hyperbolic spiral, centered on the hub; an extension portion, which is provided on the side of the blade main body that is not connected to the hub and whose width parallel to the hub's rotation axis varies around the hub's rotation axis; and a base portion, which is provided on either the one side or the opposite side of the extension portion; and since at least one of the multiple reinforcing portions is connected to the base at a point farthest from the hub, the reinforcing portion is connected to the base portion even on the tip side of the blade, thereby increasing the rigidity of the tip side of the blade.

[0029] In the rotor according to the 11th concept of the present invention, the portion of the reinforcing portion connected to the base portion and the portion connected to the blade main body portion are not misaligned in the direction of the rotation axis of the hub, so the reinforcing portion is less likely to come off the blade and is easier to maintain its rigidity.

[0030] In a rotor according to the twelfth concept of the present invention, at least two of the multiple blades each include a blade main body portion, the end of which on one side or the end on the opposite side when viewed from one side being formed in any of the following shapes: a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, or a hyperbolic spiral, centered on the hub; an extension portion provided on the side of the blade main body that is not connected to the hub, and whose width parallel to the hub's rotation axis varies around the hub's rotation axis; and a base portion provided on either the one side or the opposite side of the extension portion, and at least two of the multiple reinforcing portions are each connected to the base portion at a point farthest from the hub, and one base portion is connected to the other base portion.Since not only are base portions provided on each of the two blades, but the base portions are continuous with each other, the extension portions of the blades are also continuous with each other, making it easier to maintain rigidity.

[0031] As described above, according to the present invention, the plurality of blades that are curved and connected to the hub are less likely to be deformed by the fluid. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a perspective view of a rotor according to a first embodiment of the present invention. [Figure 2A] FIG. 2A is a plan view of the rotor shown in FIG. [Figure 2B] FIG. 2B is a bottom view of the impeller shown in FIG. [Figure 3A] FIG. 3A is a plan view of a first blade as one of the blades that constitute the rotor of FIG. [Figure 3B] FIG. 3B is a front view of a first blade as one of the blades that constitute the rotor of FIG. [Figure 3C] FIG. 3C is a rear view of a first blade as one of the blades that make up the rotor of FIG. [Figure 3D] FIG. 3D is a left side view of a first blade as one of the blades that constitute the rotor of FIG. [Figure 3E]FIG. 3E is a right side view of a first blade as one of the blades that constitute the rotor of FIG. [Figure 4] FIG. 4 is a perspective view of a rotor according to a second embodiment of the present invention. [Figure 5] In Figure 5, the right side is a bottom view of the second reinforcing group (reinforcing portion) of the rotor according to the second embodiment, and the left side is a bottom view of the second reinforcing group (reinforcing portion) of the rotor according to the first embodiment. [Figure 6] FIG. 6 is a perspective view of a rotor according to a third embodiment of the present invention. [Figure 7] FIG. 7 is a perspective view of a rotor according to a fourth embodiment of the present invention. [Figure 8] FIG. 8 is a plan view of a rotor according to a fifth embodiment of the present invention. [Figure 9A] FIG. 9A is a partial cross-sectional view taken along line BB in FIG. [Figure 9B] FIG. 9B is a cross-sectional view of a modified example of the portion along the line BB in FIG. [Figure 10] FIG. 10 is a partial cross-sectional view taken along line AA in FIG. 2A. [Figure 11] FIG. 11 is a schematic diagram showing the relationship between the rotor blades and the power generating motor or the drive motor. [Figure 12] FIG. 12 is a perspective view of a rotor according to a sixth embodiment of the present invention. [Figure 13A] FIG. 13A is a perspective view of a first blade as one of the blades that constitute the rotor of FIG. [Figure 13B] FIG. 13B is a front view of a first blade as one of the blades that make up the rotor of FIG. [Figure 13C] FIG. 13C is a rear view of a first blade as one of the blades that make up the rotor of FIG. [Figure 13D] FIG. 13D is a left side view of a first blade as one of the blades that make up the rotor of FIG. [Figure 13E] FIG. 13E is a right side view of a first blade as one of the blades that make up the rotor of FIG. [Figure 14A]FIG. 14A is a plan view of the connecting portion, the blade main body portion, and the extension portion shown in FIG. 13A. [Figure 14B] FIG. 14B is a bottom view of the connecting portion, blade main body portion, and extension portion shown in FIG. 13A. [Figure 15A] FIG. 15A is a plan view of the base shown in FIG. 13A. [Figure 15B] FIG. 15B is a bottom view of the pedestal shown in FIG. 13A. [Figure 15C] FIG. 15C is a front view of the base shown in FIG. 13A. [Figure 15D] FIG. 15D is a rear view of the base shown in FIG. 13A. [Figure 15E] FIG. 15E is a left side view of the base shown in FIG. 13A. [Figure 15F] FIG. 15F is a right side view of the base shown in FIG. 13A. [Figure 16] Figure 16 is a schematic diagram showing the relationship between the blade main body, extension, and base in the first blade shown in Figure 12, with the upper left showing the relationship between the blade main body, extension, and base in a plan view, the lower left showing the relationship between the blade main body, extension, and base in a rear view, the upper right showing a plan view of the first blade, and the lower right showing a rear view of the first blade. [Figure 17] FIG. 17 is a diagram schematically showing a method of assembling the first blade shown in FIG. 13A. [Figure 18A] FIG. 18A is a perspective view of a first blade constituting a rotor according to a seventh embodiment of the present invention. [Figure 18B] FIG. 18B is a rear view of a first blade constituting a rotor according to a seventh embodiment of the present invention. [Figure 19A] FIG. 19A is a perspective view of a first blade constituting a rotor according to an eighth embodiment of the present invention. [Figure 19B] FIG. 19B is a rear view of a first blade constituting a rotor according to an eighth embodiment of the present invention. [Figure 20A] FIG. 20A is a perspective view of a first blade and a second blade constituting a rotor according to a ninth embodiment of the present invention. [Figure 20B] FIG. 20B is a front view of the first blade and the second blade constituting the rotor according to the ninth embodiment of the present invention. [Figure 21A] FIG. 21A is a perspective view of the base shown in FIG. 20A. [Figure 21B] FIG. 21B is a front view of the base shown in FIG. 20A. [Figure 21C] FIG. 21C is a perspective view of the base part as seen from a different direction than that of FIG. 21A. [Figure 22] FIG. 22 is a perspective view of a rotor according to a tenth embodiment of the present invention. [Figure 23] FIG. 23 is a diagram schematically illustrating a state in which the first blade, which can be provided even if it is curved around the rotation axis of the hub, is virtually extended in a plane. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments of the present invention include design modifications, such as changing or deleting some of the components of one embodiment or replacing some of the components with components of another embodiment, within the scope of the present invention.

[0034] [First embodiment] FIG. 1 shows a perspective view of a rotor according to a first embodiment of the present invention, FIG. 2A shows a plan view of the rotor shown in FIG. 1, and FIG. 2B shows a bottom view of the rotor shown in FIG.

[0035] The rotor 1 according to the first embodiment of the present invention is configured to include a hub 10, a plurality of blades including a first blade 20, a second blade 30 and a third blade 40, a reinforcing portion 50 and a reinforcing portion 60.

[0036] An axle (not shown) extending in one direction is inserted into the hub 10, or the axle is integrated with the hub 10. The axle is connected to a generator motor, with a speed governor (not shown) interposed as necessary, and the rotation from the hub 10 is adjusted by the speed governor and transmitted to the generator motor, which generates electricity. The axle is also connected to a drive motor, with a speed governor (not shown) interposed as necessary, and the rotation from the drive motor is adjusted by the speed governor and transmitted to the hub 10, which rotates the hub 10.

[0037] As shown in FIG. 1, the first blade 20, the second blade 30 and the third blade 40 as the plurality of blades are configured by three pieces, but they may be configured by two pieces, four pieces or other pieces.

[0038] 3A, 3B, 3C, 3D, and 3E show, in order, a plan view, a front view, a rear view, a left side view, and a right side view of a first blade 20 as one of the blades constituting the rotor 1 of FIG. 1. As shown in FIGS. 3A to 3E, one end of the first blade 20 is connected to the hub 10 and curved around the hub 10. The first blade 20 is integrally formed and includes a connecting portion 21, a blade main body 22, and a tip portion 23. The connecting portion 21 is the portion where one end of the blade main body 22 is twisted and connected to the hub 10. The blade main body 22 is continuous with the connecting portion 21, and when viewed from one side of the hub 10 (specifically, when viewed from the +Z direction to the -Z direction), an upper end 22a is formed in a predetermined spiral shape, and when viewed from the same side, a lower end 22b is formed in a predetermined spiral shape closer to the hub 10 than the upper end 22a. The blade main body 22 has a larger curvature at the lower end 22b than at the upper end 22a. Therefore, the curved surface of the blade main body 22 facing the hub 10 has a normal that intersects with the hub 10 on one side (specifically, on the +Z axis) of the hub 10. The tip 23 has an upper end 23a that is formed in an arc shape equidistant from the hub 10 when viewed from one side (specifically, when viewed from the +Z direction to the -Z direction), and a lower end 23b that is formed in a spiral shape closer to the hub 10 than the upper end 22a when viewed from the same side. The curved surface of the tip 23 facing the hub 10 has a normal that intersects with the hub 10 on one side (specifically, on the +Z axis). Here, the lower end 23b may also be formed in an arc shape equidistant from the hub 10 when viewed from one side (specifically, when viewed from the +Z direction to the -Z direction). Here, the upper end 22a is the end (front end) on one side, and the lower end 22b is the end (rear end) on the opposite side.

[0039] Either the upper end 22a or the lower end 22b of the blade body 22 is formed in a predetermined spiral shape, such as a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, or a hyperbolic spiral, centered on the hub 10. The lower end 23b of the tip 23 is smoothly connected along the lower end 22b of the blade body 22.

[0040] The dimension in the Z-axis direction along the hub 10 between the upper end 22a and the lower end 22b of the blade body 22 is approximately the same and uniform regardless of the angle formed from the +X-axis direction of the blade body 22 around the hub 10. In other words, the width of the blade body 22 parallel to the rotation axis of the hub 10 is uniform around the hub 10, and the upper end 22a and lower end 22b of the blade body 22 are approximately parallel in front view, rear view, and left and right side views.

[0041] Meanwhile, the dimension in the Z-axis direction along the hub 10 between the upper end 23a and the lower end 23b of the tip portion 23 depends on the angle formed from the +X-axis direction of the tip portion 23 with the hub 10 as the center, and becomes smaller toward the tip. Here, the lower end 22b of the blade body 22 and the lower end 23b of the tip portion 23 do not change in one direction (+Z direction) or the opposite direction (-Z direction) of the hub 10, and exist within the same XY plane.

[0042] As shown in the figure, first blade 20 has a blade main body 22 that forms an angle of approximately 180 degrees around hub 10 when viewed from one side (looking from the +Z direction to the -Z direction) or from the opposite side (looking from the -Z direction to the +Z direction), and has a tip end 23 that forms an angle of approximately 90 degrees around hub 10. The angles that blade main body 22 and tip end 23 of first blade 20 form around hub 10 can be selected arbitrarily, and blade main body 22 does not have to make one revolution around hub 10 as shown in the figure, but may make multiple revolutions.

[0043] The second blade 30 and the third blade 40 also have a shape similar to that of the first blade 20 .

[0044] In the illustrated embodiment, the plurality of blades are three, a first blade 20, a second blade 30, and a third blade 40, and are arranged concentrically around the hub 10, offset by 120 degrees. In the case of any number of blades, they are arranged concentrically around the hub 10, offset by a predetermined angle so as to be equally spaced.

[0045] The rotor 1 according to the first embodiment of the present invention has a first blade 20, a second blade 30 and a third blade 40 attached to a hub 10 as the above-described multiple blades, so that the multiple blades can rotate by receiving a fluid (gas such as air, or liquid such as water), or the rotation of the multiple blades can push out the fluid from the multiple blades.

[0046] In the rotor 1 according to the first embodiment of the present invention, a plurality of linear reinforcing portions 50 are provided on the first blade 20, the second blade 30, and the third blade 40, which are the plurality of blades on one side (+Z direction) of the hub 10. The plurality of linear reinforcing portions 50 are referred to as a "first reinforcing group" to distinguish them from a plurality of linear reinforcing portions 60, which will be described later. In the illustrated embodiment, the first reinforcing group 50 is composed of three members: a first reinforcing portion 51, a second reinforcing portion 52, and a third reinforcing portion 53, but the number of members may be two, four, or other numbers. The first reinforcing portion 51 is curved in a direction away from the hub 10. A portion of one end (base end) of the first reinforcing portion 51 is connected to the hub 10, and a portion of the other end (tip end) is connected to the upper end 22a of the first blade 20 that is the outermost (i.e., the farthest from the hub 10). The second reinforcing portion 52 and the third reinforcing portion 53 are also curved in a direction away from the hub 10. One end (base end) of the second reinforcing portion 52 is connected to the hub 10, and a portion of the other end (tip end) is connected to the upper end 42a of the outermost third blade 40 (i.e., the farthest from the hub 10). One end (base end) of the third reinforcing portion 53 is connected to the hub 10, and a portion of the other end (tip end) is connected to the upper end 32a of the outermost second blade 30 (i.e., the farthest from the hub 10). Here, portions of the other ends (tip ends) of the first reinforcing portion 51, the second reinforcing portion 52, and the third reinforcing portion 53 may be connected to the upper ends of the tips of the corresponding blades, but the portions connected to the upper ends of the blade main bodies rather than the tip ends are located in the same XY plane, making them easier to process and less likely to cause damage or other problems. Depending on their cross-sectional shapes, one end or the other end of the first reinforcing portion 51, the second reinforcing portion 52, and the third reinforcing portion 53 may protrude from the multiple blades to which they are connected on an extension line in the direction in which they are arranged.

[0047] As shown in the figure, the first reinforcing portion 51, the second reinforcing portion 52, and the third reinforcing portion 53 are connected multiple times to the upper ends of the first blade 20, the second blade 30, and the third blade 40, respectively. In terms of the first reinforcing portion 51, it is connected twice to the upper ends of each of the third blade 40, the second blade 30, the first blade 20, the third blade 40, the second blade 30, and the first blade 20, in that order. By connecting multiple times in this manner, even if the multiple blades rotate and interact with a fluid, deformation is suppressed by the action of the first reinforcing group 50.

[0048] In the rotor 1 according to the first embodiment of the present invention, a plurality of linear reinforcing portions 60 are provided on the first blade 20, the second blade 30, and the third blade 40, which are the blades on the opposite side (-Z direction side) of the hub 10. The plurality of linear reinforcing portions 60 are referred to as a "second reinforcing group" to distinguish them from the plurality of linear reinforcing portions 50 described above. In the illustrated embodiment, the second reinforcing group 60 is composed of three members: a first reinforcing portion 61, a second reinforcing portion 62, and a third reinforcing portion 63, but the number of members may be two, four, or other numbers. The first reinforcing portion 61 is curved in a direction away from the hub 10. One end (base end) of the first reinforcing portion 61 is partially connected to the hub 10, and the other end (tip end) is partially connected to the lower end 23b of the outermost first blade 20 (i.e., the farthest from the hub 10). The second reinforcing portion 62 and the third reinforcing portion 63 are also curved in a direction away from the hub 10. The second reinforcing portion 62 has a portion on one end (base end) side connected to the hub 10, and a portion on the other end (tip end) side connected to the lower end 33b of the second blade 30 that is the outermost (i.e., the farthest from the hub 10) side. The third reinforcing portion 63 has a portion on one end (base end) side connected to the hub 10, and a portion on the other end (tip end) side connected to the lower end 43b of the third blade 40 that is the outermost (i.e., the farthest from the hub 10) side. Here, portions on the other end (tip end) side of the first reinforcing portion 61, the second reinforcing portion 62, and the third reinforcing portion 63 may be connected to the lower end of the blade main body of the corresponding blade, but connecting to the lower end of the tip portion will provide greater reinforcement than connecting to the lower end of the blade main body.

[0049] In the rotor 1 according to the first embodiment of the present invention, a first reinforcing group 50 is provided on one side and a second reinforcing group 60 is provided on the opposite side, and the direction of curvature of the first reinforcing group 50 and the second reinforcing group 60 is opposite to the direction of curvature of the first blade 20, the second blade 30, and the third blade 40. Therefore, since the first reinforcing group 50 and the second reinforcing group 60 are provided in the opposite direction to the direction in which the first blade 20, the second blade 30, and the third blade 40 deform, deformation of the first blade 20, the second blade 30, and the third blade 40 as a plurality of blades is easily suppressed. Note that the first reinforcing portion 61, the second reinforcing portion 62, and the third reinforcing portion 63 constituting the second reinforcing group 60 have approximately the same curvature as the first reinforcing portion 51, the second reinforcing portion 52, and the third reinforcing portion 53 constituting the first reinforcing group 50.

[0050] [Second embodiment] Fig. 4 shows a perspective view of a rotor according to a second embodiment of the present invention. The right side of Fig. 5 shows a bottom view of a second reinforcing group (reinforcing portion) 70 of the rotor according to the second embodiment, and for comparison, the left side shows a bottom view of a second reinforcing group (reinforcing portion) 60 of the rotor according to the first embodiment. The rotor 2 according to the second embodiment of the present invention comprises a hub 10, a plurality of blades including a first blade 20, a second blade 30, and a third blade 40, a first reinforcing group 50, and a second reinforcing group 70. In the figures showing the first embodiment, identical components are designated by the same reference numerals to avoid duplication of description.

[0051] In the rotor 2 according to the second embodiment of the present invention, unlike the rotor 1 according to the first embodiment, the first reinforcing portion 71, the second reinforcing portion 72, the third reinforcing portion 73, the fourth reinforcing portion 74, the fifth reinforcing portion 75, and the sixth reinforcing portion 76 constituting the second reinforcing group 70 have a smaller curvature than the first reinforcing portion 51, the second reinforcing portion 52, and the third reinforcing portion 53 constituting the first reinforcing group 50. As a result, the first reinforcing portion 71, the second reinforcing portion 72, the third reinforcing portion 73, the fourth reinforcing portion 74, the fifth reinforcing portion 75, and the sixth reinforcing portion 76 constituting the second reinforcing group 70 have fewer connections to the first blade 20, the second blade 30, and the third blade 40. Furthermore, the number of reinforcing portions constituting the second reinforcing group 70 is also increased. The number of reinforcing portions in the second reinforcing group 70 is six, as shown in the figure, but the number may be determined according to the curvature. The rest is the same as in the first embodiment.

[0052] [Third embodiment] Figure 6 is a perspective view of a rotor according to a third embodiment of the present invention. The rotor 3 according to the third embodiment of the present invention includes a hub 10, a plurality of blades, namely, a first blade 20, a second blade 30, and a third blade 40, a plurality of linear reinforcing portions 60, and a ring portion 80. In the drawings showing the first embodiment, the same components are designated by the same reference numerals to avoid duplication of explanation.

[0053] Unlike the first embodiment of the present invention, the rotor 3 according to the third embodiment of the present invention does not include a first reinforcing group 50 on one side of the first blade 20, the second blade 30, and the third blade 40 as the plurality of blades, and instead includes a ring portion 80 symmetrically arranged with respect to the hub 10. As shown in FIG. 6 , the ring portion 80 has an annular shape with a predetermined radius. The ring portion 80 preferably has a radius that is at least half to one-third the radius of the first blade 20, the second blade 30, and the third blade 40 as the plurality of blades (the radius of the arc at the upper end of the tip portion). The radius of the ring portion 80 is equal to or less than the radius of the first blade 20, the second blade 30, and the third blade 40 as the plurality of blades (the radius of the arc at the upper end of the tip portion). This is because deformation of the first blade 20, the second blade 30, and the third blade 40 as the plurality of blades can be suppressed. The ring portion 80 is connected to the first blade 20, the second blade 30, and the third blade 40 at connection points 81, 82, and 83, respectively.

[0054] [Fourth embodiment] 7 is a perspective view of a rotor according to a fourth embodiment of the present invention. The rotor 4 according to the fourth embodiment of the present invention includes a hub 10, a plurality of blades including a first blade 20, a second blade 30, and a third blade 40, a first reinforcing group 90, a second reinforcing group 60, and a ring portion 95. In the figures showing the first embodiment, the same components are designated by the same reference numerals to avoid duplication of explanation.

[0055] In a rotor 4 according to a fourth embodiment of the present invention, a ring portion 95 is provided on one side of a plurality of blades, namely, first blade 20, second blade 30, and third blade 40, in a shape symmetrical with respect to hub 10. Ring portion 95 has an annular shape with a predetermined radius, but unlike the third embodiment, it preferably has a radius that is ½ or less, and more preferably ¼ or less, of the radius of the plurality of blades, namely, first blade 20, second blade 30, and third blade 40 (the radius of the arc at the upper end of the tip portion).

[0056] A portion of one end (base end) of the first reinforcing portion 91, the second reinforcing portion 92, and the third reinforcing portion 93 constituting the first reinforcing group 90 according to the first embodiment of the present invention is connected to the ring portion 95, and a portion of the other end (tip end) of the first reinforcing portion 91, the second reinforcing group 92, and the third reinforcing group 93 is connected at each connection point of the first blade 20, the second blade 30, and the third blade 40 that are farthest from the hub 10. In this way, the ring portion 95 and the first reinforcing group 90 can suppress deformation of the first blade 20, the second blade 30, and the third blade 40 due to fluid from the +Z direction side or fluid pushed out toward the +Z direction.

[0057] [Fifth embodiment] Fig. 8 shows a plan view of a rotor according to a fifth embodiment of the present invention. The rotor 5 according to the fifth embodiment of the present invention includes a hub 10, a plurality of blades including a first blade 20, a second blade 30, and a third blade 40, a first reinforcing group 100, and a second reinforcing group 60. In the figures showing the first embodiment, the same components are designated by the same reference numerals to avoid duplication of explanation.

[0058] In the rotor 5 according to the fifth embodiment of the present invention, unlike the rotor 1 according to the first embodiment, the first reinforcing group 100 includes a first reinforcing portion 101, a second reinforcing portion 102, and a third reinforcing portion 103, which are linear, and preferably a fourth reinforcing portion 105, a fifth reinforcing portion 106, and a sixth reinforcing portion 107. The first reinforcing portion 101, the second reinforcing portion 102, and the third reinforcing portion 103 are each provided so as to connect to the hub 10 and the upper ends of the first blade 20, the second blade 30, and the third blade 40, respectively. In this case, they are connected to the upper ends of the first blade 20, the second blade 30, and the third blade 40 that are farthest from the hub 10. The first reinforcing portion 101, the second reinforcing portion 102, and the third reinforcing portion 103 each extend across all the spaces between adjacent blades and extend at equal intervals around the hub 10. As shown in FIG. 9A , a partial cross-sectional view taken along line BB in FIG. 8 , the sixth reinforcing portion 107 extends radially between the upper ends of the blade body portion 22 of the first blade 20 and the blade body portion 42 of the third blade 40, which are adjacent in the radial direction (distance L1). The fourth reinforcing portion 105 also extends radially between the upper ends of the blade body portion 32 of the second blade 30 and the blade body portion 42 of the third blade 40, which are adjacent in the radial direction. The fifth reinforcing portion 106 also extends radially between the upper ends of the blade body portions of the first blade 20 and the second blade 30, which are adjacent in the radial direction. The fourth reinforcing portion 105, the fifth reinforcing portion 106, and the sixth reinforcing portion 107 are provided in portions far from the hub 10 between the two blades whose ends are at least partially connected, thereby efficiently suppressing deformation of the corresponding two blades. 8, the fourth reinforcing portion 105, the fifth reinforcing portion 106, and the sixth reinforcing portion 107 are provided between any two of the first reinforcing portion 101, the second reinforcing portion 102, and the third reinforcing portion 103 when viewed in the circumferential direction of the hub 10. It is also possible to provide the linear fourth reinforcing portion 105, the fifth reinforcing portion 106, and the sixth reinforcing portion 107 without providing the linear first reinforcing portion 101, the second reinforcing portion 102, and the third reinforcing portion 103.

[0059] The rotor 5 according to the fifth embodiment can also achieve the same effects as those of the first embodiment. As shown in FIG. 9B, a cross-sectional view of a modified example of a portion along line BB in FIG. 8, the sixth reinforcing portion 107a is located between the blade body portion 22 of the first blade 20 and the blade body portion 42 of the third blade 40, which are adjacent in the radial direction, and also extends in the Z-axis direction. Here, the sixth reinforcing portion 107a between the radially adjacent blades (distance L1) has a dimension that inclines so that the axial distance Z1 is equal to or less than half the radial distance L1. This is to accommodate cases where the fourth reinforcing portion 105, the fifth reinforcing portion 106, or the sixth reinforcing portion 107 is not necessarily provided at the upper end of the corresponding blade due to the mounting method or processing convenience, as shown in FIG. 9B. As for the linear first reinforcing portion 101, second reinforcing portion 102, and third reinforcing portion 103, at least one of the first reinforcing portion 101, second reinforcing portion 102, and third reinforcing portion 103 between adjacent blades in the radial direction, as well as on a plane perpendicular to the rotation axis, is inclined so that the axial distance is 1 / 2 or less of the radial distance.

[0060] In the first to fifth embodiments, all of the reinforcing portions are linear, and the dimension in the Z direction can be ignored compared to the dimension of the blade in the Z axis direction.

[0061] [Sixth embodiment] FIG. 12 shows a perspective view of a rotor 6 according to a sixth embodiment of the present invention. The rotor 6 according to the sixth embodiment of the present invention includes a hub 10, a plurality of blades, namely, a first blade 120, a second blade 130, and a third blade 140, a reinforcing portion 50, and a reinforcing portion 60. Each of the first blade 120, the second blade 130, and the third blade 140 has an end face on one side of the rotation axis of the hub 10 (the +Z direction) and an end face on the opposite side (the -Z direction). Each end face is inclined and curved so that the side on the one side of the rotation axis (the +Z direction) is farther from the rotation axis than the side on the opposite side (the -Z direction). The hub 10 is the same as that described in the first embodiment. The rotor 6 according to the sixth embodiment is similar to the first embodiment in that the reinforcing portion 50 is provided at one end of the plurality of blades on one side of the rotation axis, and the reinforcing portion 60 is provided at the end of the plurality of blades on the opposite side of the rotation axis.

[0062] As shown in FIG. 12, the plurality of blades is composed of three blades: a first blade 120, a second blade 130, and a third blade 140, but it may be two, four, or any other number.

[0063] 13A, 13B, 13C, 13D, and 13E show, in order, a perspective view, a front view, a rear view, a left side view, and a right side view of a first blade 120 as one of the blades constituting the rotor 6 of FIG. 12. As shown in FIG. 12, one end of the first blade 120 is connected to the hub 10 and curved around the hub 10. The first blade 120 is integrally formed including a connecting portion 121, a blade main body 122, and an extending portion 123, and a base portion 124 is provided on the extending portion 123. In FIG. 13A, the connecting portion 121 of the first blade 120 corresponds to the curve of the hub 10, and the connecting portion 121 is connected to the hub 10.

[0064] FIG. 14A shows a plan view of the connecting portion 121, the blade main body 122, and the extension portion 123, and FIG. 14B shows a bottom view of the connecting portion 121, the blade main body 122, and the extension portion 123. When viewed from one side (viewed from the +Z direction to the -Z direction), the blade main body 122 has an end (upper end) 122a on one side or an end (lower end) 122b on the opposite side formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral shape around the hub 10. The blade main body 122 may have a uniform width parallel to the rotation axis of the hub 10 around the hub 10. Here, up and down correspond to the directions shown in FIGS. 13A to 13E. The "upper end 122a" and "lower end 122b" can also be referred to as the "front end," "rear end," or "rear end" and "front end" from upwind to downwind.

[0065] The extension portion 123 is provided on the opposite side of the connection portion 121 of the blade main body 122 around the rotation axis of the hub 10. The width of the extension portion 123 parallel to the rotation axis of the hub 10 varies around the rotation axis of the hub 10. That is, depending on the angle formed with the rotation axis of the hub 10, the end of the extension portion 123 on one side approaches the end on the opposite side, or conversely, the end of the extension portion 123 on the opposite side approaches the end on the one side. Specifically, the end (upper end, front end) 123a of the extension portion 123 on one side is different from the end (upper end, front end) 122a of the blade main body 122 on one side in the Z axis direction, and / or the end (lower end, rear end) 123b of the opposite side is different from the end (lower end, rear end) 122b of the blade main body 122 on the opposite side in the Z axis direction. The illustrated embodiment shows the former. The opposite end (lower end, rear end) 122b of the blade main body 122 and the opposite end (lower end, rear end) 123b of the extension 123 are not different in the Z-axis direction and exist on the same plane parallel to the XY plane. The one end (upper end, front end) 123a of the extension 123 approaches the tip of the opposite end (lower end, rear end) 123b of the extension 123 when viewed from the +Z direction (counterclockwise in a plan view). The length of the extension 123 in the Z-axis direction gradually shortens around the hub 10.

[0066] 15A, 15B, 15C, 15D, 15E, and 15F are plan, bottom, front, rear, left, and right side views of the base. Base 124 is provided on either the +Z side, which is one side of extension portion 123, or the -Z side, which is the opposite side. In the illustrated embodiment, base 124 is provided at end (upper end) 123a of extension portion 123 on one side, and end (lower end, rear end) 124b of base 124 on the opposite side has the same shape as end (upper end, front end) 123a of extension portion 123 on one side. Base 124 is formed such that its height in the Z direction from end (lower end, rear end) 123b of extension portion 123 on the opposite side is equal to that of blade main body 122. The first reinforcing portion 51 is connected to an end (upper end, front end) 124a of the tip end portion 124d of the base portion 124 on one side, and a base end portion 124e of the base portion 124 is smoothly connected to an end (upper end, front end) 122a on one side of the blade body portion 122. A tip side portion 124g of the end (lower end, rear end) on the opposite side of the base portion 124 is smoothly connected to an end (lower end, rear end) 123b of the extension portion 123 on the opposite side.

[0067] 16 is a schematic diagram showing the relationship between the blade main body 122, the extension portion 123, and the base portion 124 of the first blade shown in FIG. 12. The upper left shows the relationship between the blade main body 122, the extension portion 123, and the base portion 124 in a plan view, the lower left shows the relationship between the blade main body 122, the extension portion 123, and the base portion 124 in a rear view, the upper right shows a plan view of the first blade 120, and the lower right shows a rear view of the first blade 120. The upper left and lower left show the positional relationship between the blade main body 122 and the extension portion 123 before the base portion 124 is attached to them. FIG. 17 is a schematic diagram showing a method of assembling the first blade 120 shown in FIG. 13A.

[0068] Here, base portion 124 is configured as a component itself and is attached to extension portion 123, which is integrally configured including connecting portion 121, blade main body 122, and extension portion 123, thereby configuring first blade 120 as a whole. As shown in FIG. 17, a convex engaging portion 123c is provided on the attachment surface of extension portion 123 to base portion 124, and a concave engaging portion 124c (see FIG. 15B) is provided on the attachment surface of base portion 124 to extension portion 123, and engaging portion 124c is inserted into engaging portion 123c. This is because the relative positioning of extension portion 123 and base portion 124 can be achieved. Engaging portions 123c, 124c are merely an example; the engaging portion 123c shown in FIG. 17 may be concave, and the engaging portion 124c shown in FIG. 15B may be convex.

[0069] In the rotor 6 according to the sixth embodiment of the present invention, the first blade 120 has its end (upper end, front end) 122a on one side and its end (lower end, rear end) 122b on the opposite side all in the same plane due to the blade main body 122, extension 123, and base 124, so that reinforcing parts 51 can be attached to the top and bottom (front and rear) of the tip of the first blade 120, as shown in Fig. 12. This makes it possible to increase the rigidity of the tip of the first blade 120 and suppress deformation such as twisting.

[0070] Such a configuration can be applied to rotors that require higher rigidity, such as turbines for hydroelectric power generation and aircraft propellers.

[0071] Although not shown in the figures, the base portion may protrude further circumferentially toward the tip side than the extension portion, in which case the -Z side of the base portion is on the same plane as the lower end (rear end) of the extension portion (see Figures 18A and 19A showing the seventh and eighth embodiments).

[0072] The base portion 124 has a portion (the end face of the tip) that is circumferentially farthest around the hub 10 than the tip of the extension portion 123, and in this configuration, the tip side of the end (lower end, rear end) on the opposite side of the base portion 124 is provided along the end (lower end, rear end) 123b on the opposite side of the extension portion 123. The tip side of the end (lower end, rear end) on the opposite side of the base portion 124 does not change in the Z-axis direction, like the end (lower end, rear end) 123b on the opposite side of the extension portion 123, and exists in the same plane.

[0073] As shown in the figure, pedestal 124 may be provided at one end (upper end, front end) of extension portion 123, or at the opposite end (lower end, rear end) of extension portion 123, or may be provided at one end (upper end, front end) of extension portion 123 and at the opposite end (lower end, rear end) of extension portion 123. Second blade 130 and third blade 140 are similar to first blade 120, with second blade 130 being integrally configured to include a connecting portion, a blade main body, and an extension portion, and pedestal 134 being provided on the extension portion. Third blade 140 is integrally configured to include a connecting portion, a blade main body, and an extension portion, and pedestal 144 being provided on the extension portion. Details are similar to those of first blade 120, so a detailed description will be omitted.

[0074] [Seventh embodiment] Fig. 18A is a perspective view of a first blade 120 constituting a rotor according to a seventh embodiment of the present invention, and Fig. 18B is a rear view of the first blade 120. As shown in the figure, the first blade 120 is configured such that a connecting portion 121, a blade main body 122, and an extension portion 123 are integrally formed, as in the sixth embodiment, and a base portion 124 is attached to the extension portion 123 as a component.

[0075] Unlike the sixth embodiment, the base portion 124 is not attached to the entire end (upper end, front end) of the extension portion 123 on one side, and the end (upper end, front end) 124a of the base portion 124 on one side is not continuous with the end (upper end, front end) 122a of the blade main body 122 on one side, so that the end (upper end, front end) 123a of the extension portion 123 on one side is partially exposed. In this embodiment, as shown in the figure, the base portion 124 has an end surface 124f that is aligned with the rotation axis of the hub 10. The base portion 124 only needs to have a circumferential dimension sufficient to allow the linear reinforcing portion 51 to be attached, and have a predetermined angle around the rotation axis of the hub 10.

[0076] The base portion 124 has a portion (tip end face) 124d that is circumferentially farthest around the hub 10 than the tip of the extension portion 123, and in this configuration, the tip side portion 124g of the end (lower end, rear end) on the opposite side of the base portion 124 is arranged along the end (lower end, rear end) 123b on the opposite side of the extension portion 123 and exists in the same plane.

[0077] As shown in the figure, base portion 124 may be provided at one end (upper end, front end) of extension portion 123, or at the end (lower end, rear end) of extension portion 123 in the opposite direction, or may be provided at both one end (upper end, front end) of extension portion 123 and the end (lower end, rear end) of extension portion 123 in the opposite direction. The same applies to second blade 130 and third blade 140 as to first blade 120.

[0078] [Eighth embodiment] Fig. 19A is a perspective view of a first blade constituting a rotor according to an eighth embodiment of the present invention, and Fig. 19B is a rear view of the first blade constituting a rotor according to the eighth embodiment of the present invention. As shown in the figure, the first blade 120 is configured such that a connecting portion 121, a blade main body 122, and an extension portion 123 are integrally formed, as in the sixth embodiment, and a base portion 124 is attached to the extension portion 123 as a component.

[0079] The base 124 is different in that it is not attached to the entire end (upper end, front end) of the extension 123, and the end (upper end, front end) 124a of the base 124 is not continuous with the end (upper end, front end) 122a of the blade main body 122, leaving the end (upper end, front end) 123a of the extension 123 exposed. In this configuration, as shown in the figure, the base 124 has an end face 124f that intersects with the rotation axis of the hub 10. The end face 124f and the end (upper end, front end) 123a of the extension 123 form an obtuse angle. The base 124 only needs to have a circumferential dimension sufficient to allow a linear reinforcing member to be attached.

[0080] The base portion 124 has a portion (tip end face) 124d that is circumferentially farthest around the hub 10 than the tip of the extension portion 123, and in this configuration, the tip side portion 124g of the end (lower end, rear end) on the opposite side of the base portion 124 is arranged along the end (lower end, rear end) 123b on the opposite side of the extension portion 123 and exists in the same plane.

[0081] As shown in the figure, base portion 124 may be provided at one end (upper end, front end) of extension portion 123, or at the end (lower end, rear end) of extension portion 123 in the opposite direction, or may be provided at both one end (upper end, front end) of extension portion 123 and the end (lower end, rear end) of extension portion 123 in the opposite direction. The same applies to second blade 130 and third blade 140 as to first blade 120.

[0082] [Ninth embodiment] Figure 20A is an oblique view of a first blade 120 and a second blade 130 constituting a rotor relating to the ninth embodiment of the present invention, Figure 20B is a front view of the first blade 120 and the second blade 130 constituting a rotor relating to the ninth embodiment of the present invention, Figure 21A is an oblique view of base portions 124, 134 shown in Figure 20A, Figure 21B is a front view of base portions 124, 134 shown in Figure 20A, and Figure 21C is an oblique view of base portions 124, 134 seen from a direction different from that of Figure 21A.

[0083] In the sixth to eighth embodiments, a base is provided for each blade, and the bases are not directly connected to each other. In the ninth embodiment, the base 124 of the first blade 120 and the base 134 of the second blade 130 are connected and continuous, thereby further increasing rigidity.

[0084] Specifically, extension portion 123 of first blade 120 and extension portion 133 of second blade 130 each extend (circumferentially) around the rotation axis of the hub, and pedestal portion 124 is provided on extension portion 123 of first blade 120, and pedestal portion 134 is provided not only on extension portion 133 of second blade 130 but also on part of the tip of pedestal portion 124 of first blade 120. The tip of pedestal portion 124 of first blade 120, on which pedestal portion 134 is placed, has a short length in the direction of the rotation axis of the hub. The end (lower end, rear end) 124b of the base 124 on the opposite side is not misaligned with the rotation axis of the hub as a whole, but the length of the tip of the base 124 from the end (lower end, rear end) 124b on the opposite side to the end (upper end, front end) 124a on the one side becomes shorter as it approaches the tip. As a result, the exposed ends (upper end, front end) of the blade main body and base 124 of the first blade 120 and the blade main body and base 134 of the second blade 130 on the one side are on the same plane (a plane perpendicular to the rotation axis of the hub).

[0085] At one end (upper end, front end) of first blade 120, connection points P11 to P17 are provided in order from the hub's rotation axis side toward the curved outward direction as connection points with the reinforcing parts. At one end (upper end, front end) of second blade 130, connection points P21 to P27 are provided in order from the hub's rotation axis side toward the curved outward direction as connection points with the reinforcing parts.

[0086] A linear reinforcing portion (not shown in FIG. 20A) is connected from the hub (not shown) to the ends (upper ends, front ends) on one side of first blade 120 and second blade 130 at connection points P22, P13, P25, and P16 in this order. Another reinforcing portion (not shown in FIG. 20A) is connected at connection points P11, P23, P14, P26, and P17 in this order.

[0087] The first blade 120, which is composed of a connection portion, a blade main body portion, and an extension portion 123, has a base portion 124 attached to one side end (upper end, front end) of the extension portion 123, so that not only the connection points P11, P23, P14, and P26 but also the connection point P17 do not shift in position in the direction of the rotation axis of the hub, and therefore the reinforcing portion can also be attached to the tip portion of the first blade 120 on the same plane (a plane perpendicular to the rotation axis of the hub).

[0088] Further, another reinforcing portion (not shown in FIG. 20A ) is connected at connection points P21, P12, P24, P15, and P27 in this order. Second blade 130, which includes the connection portion, blade main body, and extension portion 133, has base portion 134 attached to one end (upper end, front end) of extension portion 133. This prevents misalignment in the direction of the rotational axis of the hub at connection points P21, P12, P24, and P15, as well as connection point P27. This allows a reinforcing portion to be attached to the tip of second blade 130 on the same plane (a plane perpendicular to the rotational axis of the hub).

[0089] Connection points with the reinforcing portion are also provided at the ends (lower ends, rear ends) of the opposite sides of first blade 120 and second blade 130, and the reinforcing portion is connected therebetween.

[0090] In the ninth embodiment, the ends (lower end, rear end) of the connecting portion, blade main body, and extension portion 123 on the opposite side that constitute first blade 120 are not misaligned in the direction of the rotation axis of the hub, so a reinforcing portion can also be attached to extension portion 123 of first blade 120 on the same plane. The ends (lower end, rear end) of the connecting portion, blade main body, and extension portion 133 on the opposite side that constitute second blade 130 are not misaligned in the direction of the rotation axis of the hub, so a reinforcing portion can also be attached to extension portion 133 of second blade 130 on the same plane. The same can be achieved by providing a base portion at the end (lower end, rear end) on the opposite side.

[0091] As shown in the figure, the base portions 124, 134 may be provided at one end (upper end, front end) of the extension portion 123, or at the end (lower end, rear end) of the extension portion 123 in the opposite direction, or may be provided at both the end (upper end, front end) of the extension portion 123 in one direction and the end (lower end, rear end) of the extension portion 123 in the opposite direction.

[0092] [Tenth embodiment] 22 shows a perspective view of a rotor 7 according to a tenth embodiment of the present invention. The rotor 7 according to the tenth embodiment of the present invention is configured to include a hub 10, a plurality of blades, namely a first blade 150, a second blade 160, and a third blade 170, a reinforcing portion 50, and a reinforcing portion 60. The hub 10 is the same as that described in the first embodiment. Similar to the first embodiment, the reinforcing portion 50 is provided at one end of the plurality of blades on one side of the rotation shaft, and the reinforcing portion 60 is provided at the other end of the plurality of blades on the opposite side of the rotation shaft.

[0093] As shown in FIG. 22, the plurality of blades is composed of three blades: a first blade 150, a second blade 160, and a third blade 170, but it may be two, four, or any other number.

[0094] As shown in Fig. 22, a first blade 150, which is one of the blades that make up the rotor 7 in Fig. 22, has one end connected to the hub 10 and is curved around the hub 10. The first blade 150 is integrally formed including a connecting portion and a blade main body 152. When viewed from one side, the end of the blade main body 152 on one side (the +Z-axis side) or the end on the opposite side (the -Z-axis side) is formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral, centered on the hub 10. Furthermore, the width of the blade main body 152 parallel to the rotation axis of the hub 10 is uniform around the hub 10. That is, when viewed from one side of the blade body 152, the end of the blade body 152 on one side (the side in the +Z-axis direction) does not change around the hub 10, and the end of the blade body 152 on the opposite side (the side in the -Z-axis direction) does not change around the hub 10. That is, the ends of the blade body 152 do not shift in the Z-axis direction around the hub 10.

[0095] Therefore, when each linear reinforcing portion 50 is provided at the end (upper end, front end) of one of the blades on one side of the rotation axis, the tips of reinforcing portions 51, 52, and 53 can be attached to the tip side of the blade main body portion 152, as shown in Figure 22.

[0096] When each linear reinforcing portion 60 is provided at the end (lower end, rear end) of each of the blades on the opposite side of the rotation axis, the tips of reinforcing portions 61, 62, and 63 can be attached to the tip side of the blade main body portion 152, as shown in Figure 22.

[0097] 22, the linear reinforcement portions 51, 52, and 53 have the same rotation direction as the linear reinforcement portions 61, 62, and 63 when viewed from one side, and all are counterclockwise when viewed from the +Z direction. The linear reinforcement portions 51, 52, and 53 may have an opposite rotation direction to the linear reinforcement portions 61, 62, and 63 when viewed from one side. As in the first embodiment, the reinforcement portion 60 is provided at the end of the multiple blades facing away from the rotation axis.

[0098] 3A to 3D showing the first embodiment and 13A to 21C showing the sixth to ninth embodiments, a linear reinforcing portion can be attached by providing a recess at one end (upper end, front end) and the opposite end (lower end, rear end) of each blade. Conversely, the linear reinforcing portion may be processed to have projections and recesses so as to engage with the connection portions to the blades, and the projections and recesses of the reinforcing portion may be used to connect to the blades.

[0099] [Other embodiments] The embodiments of the present invention are not limited to those described above, and may be modified as appropriate within the scope of the present invention when applied.

[0100] As in the rotor 2 according to the second embodiment of the present invention, each reinforcing portion of the second reinforcing group 70 may have a smaller curvature than each reinforcing portion of the first reinforcing group 50, and this may be applied to the third and fourth embodiments.

[0101] As in the rotor 3 according to the third embodiment of the present invention, ring portions 80 may not be provided on the +Z side of the blades, but may be provided on the -Z side of the blades. A reinforcing group is provided on the side where no ring portion is provided.

[0102] As in the rotor 4 according to the fourth embodiment of the present invention, it is also possible to provide a ring portion and a first reinforcing group connected thereto on the -Z side of the blades, rather than providing the ring portion 95 and the first reinforcing group 90 on the +Z side of the blades. Another reinforcing group is provided on the side where the ring portion is not provided.

[0103] As in the rotor 5 according to the fifth embodiment of the present invention, not only can a reinforcing group consisting of linear reinforcing portions be provided on the +Z side of a plurality of blades, but they may also be provided on the -Z side of a plurality of blades. Also, linear reinforcing portions may be provided as a first reinforcing group on the +Z side of a plurality of blades, and linear reinforcing portions may be provided as a second reinforcing group on the -Z side of a plurality of blades. In this case, a reinforcing portion may be provided across the space between the hub 10 and the blade farthest from the hub 10, or at least linear reinforcing portions may be provided in one or more spaces between adjacent blades in the radial direction.

[0104] In each of the above-described embodiments, each reinforcing portion does not have to be formed only with curved portions as shown in the figures, but may have a portion formed in a straight line, or may be formed entirely in a straight line and bend each time it connects with each blade, forming a bent straight line.

[0105] Each reinforcing portion may have a cross section that is circular, elliptical, triangular, rectangular or other polygonal, and the linear reinforcing portions may be hollow tubular.

[0106] The connection of each reinforcing portion to the blade may be achieved not only by adhesion with an adhesive, but also by welding, adhesion, or by fasteners such as screws, or by other methods.

[0107] The ring portion may be circular, elliptical, rectangular, or of any other shape as long as it has no end.

[0108] In the first to fifth embodiments, at least one of multiple reinforcing portions (reinforcing groups) and ring portions is provided on both the +Z side and the -Z side of the multiple blades, but this may be only on the +Z side or only on the -Z side.

[0109] In the first to fifth embodiments, a certain reinforcing portion may be connected to all of the first blade 20, the second blade 30, and the third blade 40, or may be connected only between specific two blades that are radially adjacent from the hub.

[0110] Various methods of connecting the first blade 20, second blade 30, and third blade 40 as the multiple blades to each reinforcing portion are possible. FIG. 10 shows an example of a partial cross-sectional view taken along line AA in FIG. 2A . Hub 10 has a hub body 11, and blades (only first blade 20 is shown in FIG. 10 ) are connected to the side of hub body 11. Rotating shaft 110 is inserted into and connected to hub body 11. In this figure, the hub body 11 is an inner roller type in which a drive motor and a generator motor are provided to couple with rotating shaft 110. However, this is not limiting, and an outer roller type may also be used. A connecting portion 13 that connects to third reinforcing portion 53 is provided on the +Z direction of hub body 11, and a connecting portion 12 that connects to second reinforcing portion 52 is provided on the -Z direction. Connecting portions 12 and 13 are sandwiched between and connected to hub body 11.

[0111] As shown in FIG. 10 , the hub 10 may be configured such that the connecting portion 12 and a reinforcing portion such as the second reinforcing portion 52 are integrally molded, and the connecting portion 13 and a reinforcing portion such as the third reinforcing portion 53 are integrally molded, and these integrally molded parts are connected to the hub main body 11. The hub 10 may be configured such that the reinforcing portion such as the second reinforcing portion 52 is joined to the connecting portion 12 with a fastener such as a bolt, and the reinforcing portion such as the third reinforcing portion 53 is joined to the connecting portion 13 with a fastener such as a bolt, and the connecting portions 12 and 13 are joined to the hub main body 11. The hub 10 may be configured such that the reinforcing portions such as the second reinforcing portion 52 and the third reinforcing portion 53 are connected to the hub main body 11 one by one. Various methods such as adhesive bonding, welding, and screw fastening are used to connect or join the reinforcing portions such as the second reinforcing portion 52 and the third reinforcing portion 53.

[0112] Various methods such as adhesive bonding, welding, and screw fastening can be used to connect and join the first blade 20, second blade 30, and third blade 40 as multiple blades to the hub main body 11, and the first blade 20, second blade 30, and third blade 40 as multiple blades may be molded integrally with part or all of the hub main body 11.

[0113] The connection or coupling between the hub 10 and reinforcing portions such as the second reinforcing portion 52 and the third reinforcing portion 53 is merely an example, and other configurations are also possible. Regarding the connection or coupling of reinforcing portions such as the second reinforcing portion 52 and the third reinforcing portion 53 to the first blade 20, the second blade 30, and the third blade 40 as multiple blades, as shown in FIG. 10 , the reinforcing portions are linear, and the first blade 20, the second blade 30, and the third blade 40 as multiple blades have short dimensions in the Z-axis direction. As shown in FIG. 10 , when reinforcing portions such as the second reinforcing portion 52 and the third reinforcing portion 53 are connected to either the upper end or the lower end of the first blade 20, the second blade 30, and the third blade 40 as multiple blades, the majority of the reinforcing portion may be exposed from the blade, only a portion of the reinforcing portion may be exposed from the blade, or even a portion may protrude from the first blade 20, the second blade 30, and the third blade 40 as multiple blades. Furthermore, the reinforcing parts such as the second reinforcing part 52 and the third reinforcing part 53 may all be embedded in either the upper end side or the lower end side of the first blade 20, the second blade 30 and the third blade 40 as multiple blades, so that the reinforcing parts are not exposed.

[0114] In the embodiment shown in FIG. 10 , the rotating shaft 110 is inserted into the hub main body 11 from the −Z direction, and necessary components such as a generator motor, a drive motor, an adjuster, and an oscillating mechanism are mounted on the rotating shaft 110. FIG. 11 schematically shows the relationship between the rotor 1 and components 111a and 111b, such as the generator motor or the drive motor. The rotating shafts 110a and 110b of the rotor 1 may be arranged to extend from the rotor 1 in the +Z direction or in the −Z direction. Components 111a and 111b, such as the generator motor or the drive motor, are attached to the opposite sides of the rotor 1 between the rotating shafts 110a and 110b. Either the rotating shaft 110a and component 111a, or the rotating shaft 110b and component 111b, or both, may be mounted. When components are mounted on both, the rotation of the rotating shaft 110a and the rotation of the rotating shaft 110b are designed to be coordinated. This can also be applied to rotors 2, 3, 4, 5 and other rotors.

[0115] 9A and 9B, the rotors 1, 2, 3, 4, and 5 are shown as having a first blade 20, a second blade 30, and a third blade 40 each made of a curved plate, but the thicknesses of the blades are adjusted according to the radial direction of the blades and the angle from the X-axis direction around the hub so that each blade separates a fluid such as air or water and generates lift from the fluid such as wind. This is mentioned in the above-mentioned Patent Documents 1 to 3, and so a detailed explanation is omitted.

[0116] In blades having a base portion on the extension portion, as in the sixth to ninth embodiments, the blade is curved and the base portion is provided at the part of the extension portion farthest from the rotation axis of the hub, thereby preventing the fluid from going outside the rotation radius as much as possible and allowing it to flow rearward.

[0117] In the matters described in the other embodiments, in any of the first, second, fourth and fifth embodiments, an extension portion may be provided adjacent to the blade main body portion, and a base portion may be provided on the extension portion, as in the sixth to ninth embodiments.

[0118] Figure 23 shows a schematic diagram of a first blade, which can be curved around the rotation axis of the hub, extended in a virtual plane. As shown in the upper part of Figure 23, in the sixth embodiment, the width of blade body 122 of first blade 120 is substantially uniform from z1 to z2, and end 123b on the -Z side of extension 123 is z1, but end 123a on the +Z side gradually decreases due to the angle it forms with the hub. Base 124 is attached to end 123a on the +Z side of extension 123, and end 124a on the +Z side of base 124 is z2.

[0119] 23, the width of blade body 122 of first blade 120 is approximately uniform from z1 to z2, and end 123a on the +Z side of extension portion 123 is z2, but end 123b on the -Z side gradually increases due to the angle it forms with the hub. Base portion 124 is attached to end 123b on the -Z side of extension portion 123, and end 124b on the -Z side of base portion 124 is z1.

[0120] As shown in the lower part of Figure 23, the width of blade body 122 of first blade 120 is approximately uniform from z1 to z2, and +Z side end 123a of extension portion 123 gradually decreases due to the angle it forms with the hub. -Z side end 123b gradually increases due to the angle it forms with the hub. Pedestal portion 124A is attached to +Z side end 123a of extension portion 123, and the +Z side end of pedestal portion 124A is z2. Pedestal portion 124B is attached to -Z side end 123b of extension portion 123, and the -Z side end of pedestal portion 124B is z1. Pedestal portions 124A and 124B may be integral. The tips of pedestal portions 124A and 124B may extend further toward the tip than the tip of extension portion 123. [Industrial Applicability]

[0121] The rotor according to the present invention can be used as a propeller for wind power generation, a turbine for hydroelectric power generation, or a turbine for steam power generation, and can also be connected to a drive motor or the like and used in blower fans, propellers for aircraft, helicopters, multicopters, etc., screws for ships, propellers for pumps, etc., and various other devices for pumping fluids. [Explanation of symbols]

[0122] 1,2,3,4,5,6,7:Rotor 10: Hub 20, 120, 150: First Blade 21, 121, 151: Connection part 22, 122, 132, 152: Blade body 22a: Upper end (front end) of the blade body 22b: Lower end (rear end) of the blade body 23:Tip 23a: Upper end of tip (front end) 23b: Lower end of tip (rear end) 30,130: Second Blade 40,140: Third Blade 50, 90: First reinforcement group (reinforcement part) 51, 61, 71, 101: First reinforcement 52, 62, 72, 102: Second reinforcement 53, 63, 73, 103: Third reinforcement 60, 70: Second reinforcement group (reinforcement part) 74,105: Fourth reinforcement 75,106: Fifth reinforcement 76, 107, 107a: 6th reinforcement 80,95: Ring section 123,133: Extension section 124, 134, 144: Base

Claims

1. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions (excluding endless reinforcing portions) each of which is provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, and each of the reinforcing portions is curved; Equipped with each of the plurality of blades includes a blade body portion whose end on the one side and whose end on the opposite side do not shift in the rotation axis direction of the hub when viewed from the one side; each of the plurality of reinforcing portions is connected to each of the plurality of blades at a plurality of locations; The plurality of reinforcing portions prevent the blade from deforming. Rotor blade.

2. The rotor according to claim 1 , wherein the plurality of blades is composed of two, three, or four blades.

3. The rotor according to claim 2 , wherein the blade body portion of each of the plurality of blades is provided at least once around the hub.

4. each of the plurality of blades is curved in a first direction around the rotation axis of the hub when viewed from the one side; each of the plurality of reinforcing portions is curved in a second direction around the rotation axis of the hub when viewed from the one direction side; the first orientation is opposite to the second orientation; The rotor of claim 3 .

5. Each of the plurality of reinforcing portions is connected to one of the plurality of blades at a point farthest from the hub. A rotor according to any one of claims 1 to 4.

6. a portion of each of the plurality of reinforcing portions on a base end side is connected to the hub; A rotor according to any one of claims 1 to 4.

7. an endless ring portion is provided on each of the blades on either the one side or the opposite side to which the reinforcing portions are respectively attached, the endless ring portion being provided across the blades; The rotor of claim 1 .

8. a portion of each of the plurality of reinforcing portions on the base end side is connected to the ring portion; The rotor of claim 7.

9. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions, each of which is provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, and each of the reinforcing portions is curved; Equipped with each of the plurality of blades includes a blade body portion whose end on the one side and whose end on the opposite side do not shift in the rotation axis direction of the hub when viewed from the one side; The plurality of reinforcing portions prevent the blade from deforming, each of the plurality of blades includes a blade body portion whose end on the one direction side or whose end on the opposite direction side, as viewed from the one direction side, is formed around the hub in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral; The width of the blade body portion parallel to the rotation axis of the hub is uniform around the hub. Rotor blade.

10. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions, each of which is provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, and each of the reinforcing portions is curved; Equipped with each of the plurality of blades includes a blade body portion whose end on the one side and whose end on the opposite side do not shift in the rotation axis direction of the hub when viewed from the one side; The plurality of reinforcing portions prevent the blade from deforming, The plurality of reinforcing portions include an endless ring portion provided at an end of the one direction and spanning the plurality of blades; a plurality of curved reinforcing portions provided at the end of the opposite side; Equipped with The plurality of reinforcing portions further include a plurality of curved reinforcing portions, each having one end connected to the ring portion and the other end connected to the corresponding blade body portion. Rotor blade.

11. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, each of the plurality of reinforcing portions having a linear shape, and the reinforcing portions between adjacent blades in the radial direction have an axial distance that is equal to or less than half the radial distance; Equipped with each of the plurality of blades includes a blade body portion whose end on the one side and whose end on the opposite side do not shift in the rotation axis direction of the hub when viewed from the one side; The plurality of reinforcing portions prevent the blade from deforming, The plurality of reinforcing portions include a first reinforcing portion and a second reinforcing portion extending across the ends of the adjacent blades in the one direction; a third reinforcing portion provided between adjacent ones of the first reinforcing portion and the second reinforcing portion as viewed in the circumferential direction of the hub, the third reinforcing portion extending between the blade main body portions of adjacent blades far from the hub and not extending between the blade main body portions of adjacent blades close to the hub; A rotor comprising:

12. Each of the plurality of blades is connected to the blade body portion, and includes a tip portion at an end on the one side or an end on the opposite side when viewed from the one side, the tip portion being equidistant from the hub. The rotor of claim 9.

13. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, Each of the plurality of reinforcing portions has a linear shape, and the reinforcing portions between the blades adjacent in the radial direction have an axial distance that is ½ or less of the radial distance, or A plurality of the reinforcing portions, each of which is curved; The plurality of reinforcing portions prevent the blade from deforming, Each of the plurality of blades has: a blade body portion whose end on the one side or the end on the opposite side, as viewed from the one side, is formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral around the hub; an extension portion provided on a side of the blade body not connected to the hub, the extension portion having a width parallel to the rotation axis of the hub that varies around the rotation axis of the hub; a base portion provided on either the one side or the opposite side of the extension portion; It is composed of At least one of the plurality of reinforcing portions is connected to the base portion at a location farthest from the hub. Rotor blade.

14. a portion of the reinforcing portion connected to the base portion and a portion of the reinforcing portion connected to the blade main body portion are not misaligned in the direction of the rotation axis of the hub; 14. The rotor of claim 13.

15. Hub and a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub, Each of the plurality of reinforcing portions has a linear shape, and the reinforcing portions between the blades adjacent in the radial direction have an axial distance that is ½ or less of the radial distance, or A plurality of the reinforcing portions, each of which is curved; The plurality of reinforcing portions prevent the blade from deforming, At least two of the plurality of blades each have: a blade body portion whose end on the one side or the end on the opposite side, as viewed from the one side, is formed in any one of a logarithmic spiral, a Fibonacci spiral, a Fermat spiral, a conical spiral, and a hyperbolic spiral around the hub; an extension portion provided on a side of the blade body not connected to the hub, the extension portion having a width parallel to the rotation axis of the hub that varies around the rotation axis of the hub; a base portion provided on either the one side or the opposite side of the extension portion; The invention comprises: At least two of the plurality of reinforcing portions are connected to the base portion at a location farthest from the hub, One of the base portions is connected to the other of the base portions. Rotor blade.

16. A hub; a plurality of blades, each connected at one end to the hub and curved around the hub; a plurality of linear reinforcing portions provided at least between adjacent blades in the radial direction on at least one side or the opposite side along the rotation axis of the hub; a ring portion having an endless shape provided across a plurality of the blades on either the one side or the opposite side to which the plurality of linear reinforcing portions are respectively attached, the linear reinforcement portions between the blades adjacent in the radial direction have a dimension in which the axial distance is ½ or less of the radial distance, Each of the plurality of blades includes a blade body portion whose end on the one side and whose end on the opposite side do not shift in the direction of the rotation axis of the hub when viewed from the one side, and a tip portion connected to the blade body portion, whose end on the one side or the end on the opposite side are equidistant from the hub when viewed from the one side, the ring portion is shaped symmetrically with respect to the hub and has a radius that is equal to or less than half the distance from the hub to the tip end of each of the plurality of blades; a portion of each of the plurality of reinforcing portions on a base end side is connected to the ring portion, each of the plurality of reinforcing portions is connected to each of the plurality of blades at a plurality of locations; The plurality of reinforcing portions and the ring portion prevent the blade from deforming. Rotor blade.

17. A rotor according to any one of claims 1 to 4 and 7 to 16; a power generating motor or a drive motor; An apparatus comprising:

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