Spiral blade vibration reduction device, spiral blade for wind power generator, and wind power generator using same

Abstract

This small wind power generator comprises: a shaft; a spiral blade formed in a spiral shape to generate a rotational force by wind and having a blade member having a curved edge and straight edges each having one end connected to an end of the curved edge; a vibration reduction unit extending along the curved edge to reduce vibration generated by rotation of the blade member and wind; a reinforcement unit extending along each straight edge to reduce the vibration of the spiral blade; a bracket rotatably supporting opposite ends of the shaft; and a generator supported by the bracket and coupled to the shaft to generate electricity by using the rotational force of the shaft.

Description

Spiral blade vibration reduction device, spiral blade for wind turbine, and wind turbine using the same

[0001] The present invention relates to a spiral blade vibration reduction device, a spiral blade for a wind turbine, and a wind turbine using the same.

[0002] Generally, representative eco-friendly power generation devices include solar power generation devices, wind power generation devices, and tidal power generation devices.

[0003] Among these, wind power generation devices can be classified into large wind power generation devices that generate power by rotating three straight blades by the wind, and small wind power generation devices that generate power by rotating multiple spiral blades by the wind.

[0004] Small wind power generators are used for self-generation in areas with poor power infrastructure, and they possess various advantages such as a relatively simple structure, low cost, and low noise.

[0005] Korean Patent No. 10-2219323, "Fixing Structure of Spiral Blades for Wind Turbines" (Registration Date: February 17, 2021), discloses a fixing structure of spiral blades for performing wind power generation. In particular, the fixing structure of spiral blades for wind turbines discloses a clamp that fixes supports, on which spiral blades are formed, by arranging them at equal intervals and pressing the supports against the shaft.

[0006] The fixing structure of the spiral blade for the above-mentioned wind turbine can fix multiple spiral blades in an overlapping state on an axis, so it has the advantage of being able to generate power regardless of wind speed.

[0007] On the other hand, if the wind pressure applied to the spiral blade changes due to a change in wind speed, severe vibration may occur in the spiral blade due to the change in wind pressure, which may cause the spiral blade to fail from the support or generate noise.

[0008] In addition, Korean registered patent 10-1592289, spiral wing unit and method of manufacturing the same (registration date February 1, 2016), discloses a spiral wing unit and a method of manufacturing the same. In the spiral wing unit and method of manufacturing the same, a connecting rod (141) that interconnects the outer edge and axis of the spiral wing is disclosed in order to resolve the vibration phenomenon of the spiral wing without increasing the thickness of the wing.

[0009] However, the spiral wing unit and the method of manufacturing the same must form a wing connector (140) that penetrates the spiral wing (110) to connect the connecting rod (141). When the spiral wing (110) rotates while the connecting rod (141) penetrates the wing connector (140), the wing connector (140) may be damaged by the connecting rod (141), or noise may be generated due to the vibration of the connecting rod (141).

[0010] [Prior Art Literature]

[0011] [Patent Literature]

[0012] (Patent Document 0001) Republic of Korea Registered Patent 10-2219323, Fixing structure of spiral blade for wind turbine (Registration date February 17, 2021)

[0013] (Patent Document 0002) Republic of Korea Registered Patent 10-1592289, Spiral Wing Unit and Method of Manufacturing the Same (Registration Date: February 1, 2016)

[0014] The present invention provides a spiral blade vibration reduction device capable of reducing vibration, shaking, and noise caused by the rotation of a spiral blade and changes in wind pressure by mounting a vibration reduction unit on the curved edge of a spiral blade that generates rotational force by wind, a spiral blade for a wind turbine, and a wind turbine using the same.

[0015] As an example, the spiral blade vibration reduction device is coupled to a blade member that rotates an axis by wind in a spiral shape, and includes a vibration reduction unit that extends along the curved edge of the blade member positioned in the direction in which wind enters to reduce the vibration of the blade member.

[0016] The vibration reduction unit of the spiral blade vibration reduction device comprises a vibration reduction body having a shape corresponding to the curved edge and a coupling member that connects the vibration reduction body to the curved edge, and the stiffness of the vibration reduction unit is greater than the stiffness of the blade member.

[0017] The vibration-reducing body of the spiral blade vibration-reducing device comprises a first body part that contacts one side surface of the blade member, a second body part that contacts the other side surface opposite to the one side surface of the blade member, and a third body part that connects the first and second body parts to form a concave coupling groove. The third body part has a resistance-reducing part formed such that the cross-sectional area gradually decreases toward the top to reduce wind resistance, and at least one of the second and third body parts of the vibration-reducing body has a deformation-reducing part formed in a groove shape along the longitudinal direction of the curved edge to suppress deformation of the vibration-reducing unit caused by external force.

[0018] The coupling member of the spiral blade vibration reduction device includes any one of an adhesive member having adhesive strength, a double-sided adhesive tape having adhesive strength, and a rubber sheet having an embossing pattern.

[0019] The vibration reduction unit of the spiral blade vibration reduction device comprises a vibration reduction body disposed in a band shape on at least one of one side surface of the curved edge and the other side surface facing the one side surface, and a coupling member that connects the vibration reduction body to the curved edge, wherein the rigidity of the vibration reduction body is formed to be greater than the rigidity of the blade member, and a resistance reduction section is formed in the part of the vibration reduction body facing the wind, in which the cross-sectional area is gradually reduced to reduce wind resistance.

[0020] The length of the vibration reduction unit of the spiral blade vibration reduction device is formed to be equal to the length of the curved edge, a connecting member having a bushing shape is coupled to the shaft, and one end of the vibration reduction unit adjacent to the shaft is integrally formed with the connecting member.

[0021] The spiral blade vibration reduction device further includes a reinforcing unit comprising a reinforcing member coupled to a straight edge connected to the curved edge and a coupling member coupled to the straight edge.

[0022] The vibration reduction unit of the spiral blade vibration reduction device includes a strength-enhancing member embedded in the vibration reduction unit in a wire shape having a strength higher than that of the vibration reduction unit, which improves rigidity.

[0023] The spiral blade vibration reduction device further includes an additional vibration reduction unit in the shape of a band, one end of which is connected to the vibration reduction unit and the other end opposite to the one end is coupled to the shaft, and the additional vibration reduction unit is formed along the curvature of the outer surface of the blade member and is in close contact with the surface of the blade member.

[0024] A spiral blade for a wind turbine comprises: a shaft; a spiral blade coupled to the shaft and formed spirally to generate rotational force by wind, having a blade member having a curved edge and a straight edge connected to the curved edge; and a vibration reduction unit extending along the curved edge to reduce vibrations generated by the rotation of the blade member and wind.

[0025] A support member is formed on the blade member of a spiral blade for a wind turbine, the support member being coupled to the outer surface of the shaft, and the support member is evenly divided and includes a first support member, a second support member, and a third support member that surround the outer surface of the shaft, and the blade member includes a first blade member formed on the first support member, a second blade member formed on the second support member, and a third blade member formed on the third support member, and the sides of the first to third support members coupled to the shaft are arranged to face each other so that the first to third blade members are arranged to overlap the shaft.

[0026] The vibration reduction unit of the spiral blade for a wind turbine comprises a vibration reduction body that surrounds at least a portion of the curved edge and a coupling member that connects the vibration reduction body to the curved edge, and the cross-section of the vibration reduction unit is formed as a U-shape, an L-shape, or an I-shape.

[0027] The reinforcing unit of the spiral blade for a wind turbine comprises a reinforcing body that wraps around at least a portion of the straight edge and is connected to the vibration reduction unit, and a connecting member that connects the reinforcing body to the straight edge.

[0028] A small wind turbine comprises: a shaft; a spiral blade having a blade member formed in a spiral shape to generate rotational force by wind and having a curved edge and a straight edge connected to the curved edge; a vibration reduction unit extending along the curved edge to reduce vibrations generated by the rotation of the blade member and wind; a reinforcement unit extending along the straight edge to reduce vibrations of the spiral blade; a bracket rotatably supporting both ends of the shaft; and a generator supported by the bracket and coupled to the shaft to generate electricity using the rotational force of the shaft.

[0029] The spiral blade vibration reduction device, the spiral blade for a wind turbine, and the wind turbine using the same according to the present invention have the effect of effectively reducing vibration, shaking, and noise caused by the rotation of the spiral blade and changes in wind pressure without using through holes or connecting rods in the spiral blade that generates rotational force by wind.

[0030] FIG. 1 is an external perspective view illustrating a small wind turbine according to an embodiment of the present invention.

[0031] FIG. 2 is an exploded perspective view showing the shaft and spiral blade illustrated in FIG. 1.

[0032] Figure 3 is a front view in direction A of Figure 2.

[0033] Figure 4 is an exploded perspective view of a spiral blade.

[0034] Figure 5 is a cross-sectional view taken along line II' of Figure 2.

[0035] Figure 6 is a cross-sectional view taken along the line II-II' of Figure 2.

[0036] Figure 7 is a cross-sectional view taken along the line III-III' of Figure 2.

[0037] Figure 8 is a cross-sectional view taken along the line IV-IV' of Figure 2.

[0038] FIG. 9 is an external perspective view illustrating an additional vibration reduction unit according to an embodiment of the present invention.

[0039] The present invention described below is capable of various modifications and may have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description.

[0040] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing the invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the invention.

[0041] The terms used in this patent are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this patent, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0042] Additionally, terms such as "first," "second," etc., may be used to distinguish and describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0043] In addition, if at least two different embodiments are described in this patent, each embodiment may use all or part of its components in combination and mixed with one another without further description, as long as it does not deviate from the technical concept of the present invention.

[0044] FIG. 1 is an external perspective view illustrating a small wind turbine according to an embodiment of the present invention.

[0045] A small wind turbine (600) includes a shaft (100), a spiral blade (200), a vibration reduction unit (300), a reinforcement unit (350), a bracket (400), and a generator (500).

[0046] FIG. 2 is an exploded perspective view showing the axis and spiral blade illustrated in FIG. 1. FIG. 3 is a front view in direction A of FIG. 2. FIG. 4 is an exploded perspective view of the spiral blade.

[0047] Referring to FIGS. 2 to 4, the shaft (100) is coupled to the spiral blade (200). The shaft (100) is rotated by the rotation of the spiral blade (200).

[0048] The shaft (100) can be formed in a hexagonal column shape. The shaft (100) can be made of various materials, such as a metal material with high strength, an engineering plastic with high strength, or a carbon fiber material.

[0049] The spiral blade (200) can be formed in a spiral shape to generate rotational force by wind pressure generated by the wind. The spiral blade (200) can be made of various materials such as FRP, carbon fiber, engineering plastic, and lightweight metal.

[0050] In one embodiment of the present invention, the spiral blade (200) includes, for example, a support (240) and a blade member (280).

[0051] The support member (240) includes a first support member (210) that covers a portion of the outer surface of the shaft (100), a second support member (220) that covers a portion of the outer surface of the shaft (100), and a third support member (230) that covers a portion of the outer surface of the shaft (100).

[0052] Although in one embodiment of the present invention, for example, three supports (240) are illustrated and described, the supports (240) may be one to two or four or more.

[0053] The first to third supports (210, 220, 230) each contact the outer surface of the shaft (100) having a hexagonal column shape, and the first to third supports (210, 220, 230) completely surround the outer surface of the shaft (100).

[0054] For example, the first support (210) covers about 1 / 3 of the outer surface of the shaft (100), the second support (220) covers about 1 / 3 of the outer surface of the shaft (100), and the third support (230) covers about 1 / 3 of the outer surface of the shaft (100).

[0055] Additionally, with the first to third supports (230) coupled to the shaft (100), the sides of the first to third supports (230) are arranged and contact each other.

[0056] Meanwhile, to prevent the first to third supports (210, 220, 230) from detaching from the shaft (100) while in contact with the shaft (100), a support fixing unit (not shown) having a clamp function is attached to the first to third supports (210, 220, 230).

[0057] The blade member (280) is attached to the outer surface of the support (240).

[0058] The blade member (280) includes a first blade member (250) having a spiral shape that is coupled to the outer surface of the first support (210), a second blade member (260) having a spiral shape that is coupled to the outer surface of the second support (220), and a third blade member (270) having a spiral shape that is coupled to the outer surface of the third support (230).

[0059] Since the sides of the first to third supports (210) are arranged on the axis (100) facing each other, the first to third blade members (250, 260, 270) are arranged on the axis (100) in a mutually overlapping state.

[0060] A blade member (280) having a spiral shape includes a curved edge (281) and a straight edge (282) connected to the curved edge (281). In one embodiment of the present invention, the curved edge (281) is positioned in a direction facing the wind.

[0061] In one embodiment of the present invention, when a blade member (280) comprising first to third blade members (250, 260, 270) arranged to overlap each other is rotated, centrifugal force is applied to the blade member (280) by rotation.

[0062] In addition, when the blade member (280) is rotated by wind, the moment applied to the blade member (280) increases as it moves further away from the axis (100), and the moment becomes maximum at the curved edge (281) of the blade member (280). In addition, when the wind pressure provided to the blade member (280) changes, the moment changes according to the wind pressure.

[0063] When an irregular moment is applied to the curved edge (281), vibration, shaking, and noise may occur in the blade member (280) due to the irregular moment, and fatigue failure of the blade member (280) may occur due to this vibration and shaking.

[0064] The vibration reduction unit (300) serves to reduce vibration and shaking of the blade member (280) caused by changes in wind intensity or wind pressure introduced into the blade member (280).

[0065] The vibration reduction unit (300) is formed in a shape corresponding to the curved edge (281) of the blade member (280) facing the direction in which the wind enters.

[0066] The vibration reduction unit (300) includes a vibration reduction body (310, 320) and a coupling member (360).

[0067] Hereinafter, various embodiments of the vibration reduction unit (300) will be described through FIGS. 5 to 7.

[0068] Figure 5 is a cross-sectional view taken along line II' of Figure 2.

[0069] Referring to FIGS. 2 and FIGS. 5, the vibration reduction unit (300) includes a vibration reduction body (310) and a coupling member (360).

[0070] One end of the vibration-reducing body (310) is connected to at least one of the previously described shaft (100) or support (240), and the other end of the vibration-reducing body (310) extends along the curved edge (281).

[0071] In one embodiment of the present invention, the vibration-reducing body (310) may be formed with a length corresponding to the length of the curved edge (281). Although in one embodiment of the present invention, the vibration-reducing body (310) is shown and described as being formed with a length corresponding to the length of the curved edge (281), the length of the vibration-reducing body (310) may be formed shorter than the length of the curved edge (281), or the vibration-reducing body (310) may be formed intermittently on the curved edge (281).

[0072] The vibration-reducing body (310) includes a first body part (312) in contact with one side surface of the curved edge (281) of the blade member (280), a second body part (314) in contact with the other side surface opposite to one side surface of the curved edge (281), and a third body part (316) connecting the first and second body parts (312, 314).

[0073] In one embodiment of the present invention, the first to third body parts (312, 314, 316) forming the vibration-reducing body (310) form a coupling groove having a concave channel shape, and the coupling groove is fitted into the curved edge (281), thereby stably coupling the vibration-reducing body (310) to the blade member (280).

[0074] Meanwhile, since the third body part (316) is positioned facing the direction of the wind, excessive wind resistance may occur due to the third body part (316). In order to reduce wind resistance caused by the third body part (316), a resistance reduction part (317) is formed on the third body part (316), and the cross-sectional area of ​​the resistance reduction part (317) gradually decreases towards the tip.

[0075] Meanwhile, in order to suppress or prevent vibration or shaking of the vibration-reducing body (310) caused by external force, at least one of the first to third body parts (312, 314, 316) has a deformation suppression part (318) formed in a groove shape along the length direction of the curved edge (281).

[0076] A plurality of deformation suppression parts (318) may be formed side by side on at least one of the first to third body parts (312, 314, 316).

[0077] Referring again to FIG. 5, the connecting member (360) prevents the vibration-reducing body (310) from being arbitrarily detached from the blade member (280).

[0078] In one embodiment of the present invention, the bonding member (360) may include an adhesive member having adhesive properties, a double-sided adhesive tape having adhesive properties, a rubber sheet having elasticity and an embossed pattern formed on its surface, etc.

[0079] Meanwhile, a strength-enhancing member (319) having a wire shape and a strength higher than that of the vibration-reducing body (310) is disposed in the vibration-reducing body (310).

[0080] The strength-enhancing member (319) is formed along the length of the curved edge (281), and the strength-enhancing member (319) can be formed integrally with the vibration-reducing body (310).

[0081] Figure 6 is a cross-sectional view taken along the line II-II' of Figure 2.

[0082] Referring to FIGS. 2 and FIGS. 6, the vibration reduction unit (300) includes a vibration reduction body (320) and a coupling member (360).

[0083] The vibration-reducing body (320) is formed in a stripe shape, and one end of the vibration-reducing body (320) is connected to at least one of the previously described shaft (100) or support (240). The other end opposite to the one end of the vibration-reducing body (320) extends along one surface of the curved edge (281). The length of the vibration-reducing body (320) has a length corresponding to the length of the curved edge (281).

[0084] The rigidity of the vibration-reducing body (320) is formed to be greater than the rigidity of the blade member (280), thereby reducing, suppressing, or preventing vibration and shaking of the blade member (280).

[0085] In the end of the vibration-reducing body (320) facing the wind, a resistance-reducing section (322) with a gradually decreasing cross-sectional area may be formed to reduce wind resistance by the vibration-reducing member (320).

[0086] Meanwhile, in order to suppress or prevent vibration or shaking of the vibration-reducing body (320) caused by an external force, a deformation suppression part (323) formed in a groove shape along the length direction of the curved edge (281) may be formed on the outer surface of the vibration-reducing body (320).

[0087] A plurality of deformation suppression parts (323) may be formed side by side on the outer surface of the vibration reduction body (320).

[0088] Referring again to FIG. 6, the coupling member (360) prevents the vibration-reducing body (320) from being arbitrarily detached from the blade member (280). For example, the coupling member (360) may include an adhesive member having adhesive properties, an adhesive double-sided adhesive tape having adhesive properties, a rubber sheet having elasticity and an embossed pattern formed on its surface, etc.

[0089] Meanwhile, a strength-enhancing member (324) having a strength higher than that of the vibration-reducing body (320) is disposed in the vibration-reducing body (320) in the shape of a wire, and the strength-enhancing member (324) is formed in the longitudinal direction of the curved edge (281) and can be embedded inside the vibration-reducing body (320).

[0090] Although in one embodiment of the present invention, the vibration-reducing body (320) is shown and described as being formed only on one side surface of the blade member (280), otherwise, as shown in FIG. 7, the vibration-reducing body (320) can be mounted not only on one side surface of the blade member (280) but also on the other side surface opposite to the one side surface via a coupling member (360).

[0091] As previously explained, one end of a vibration reduction unit (300) that is coupled to the curved edge (281) of each of the first to third blade members (250, 260, 270) is coupled to a support member coupled to the shaft (100). However, alternatively, the end of the vibration reduction unit (300) coupled along the curved edge (281) of each of the first to third blade members (250, 260, 270) forming the blade member (280) that is adjacent to the shaft (100) may be coupled to a connecting member (not shown) having a bushing shape that is coupled to the shaft (100) and rotates together with the shaft (100).

[0092] Figure 8 is a cross-sectional view taken along the line IV-IV' of Figure 2.

[0093] Referring to FIGS. 2 and FIGS. 8, a reinforcing unit (350) is placed on a straight edge (282) connected to a curved edge (281) of a blade member (280), and the reinforcing unit (350) prevents vibration, shaking, and noise from occurring on the straight edge (282) due to wind or rotational force.

[0094] The reinforcing unit (350) includes a reinforcing member (352) and a connecting member (354).

[0095] The reinforcing member (352) can be formed in a strip shape, with a cross-section in the shape of a U, an L, or an I. That is, the reinforcing member (352) has a shape suitable for being fitted into or contacting the straight edge (282).

[0096] In order to reduce wind resistance caused by the reinforcing member (352), a low-strength reduction section (353) in which the cross-sectional area gradually decreases toward the tip may be formed at the end of the reinforcing member (352) that faces the wind.

[0097] A connecting member (354) is positioned between the reinforcing member (352) and the blade member (280) to prevent the reinforcing member (352) from being accidentally detached from the blade member (280). Various materials and materials, such as adhesive, double-sided adhesive tape, and rubber sheets, may be used for the connecting member (354).

[0098] Meanwhile, a strength-enhancing member (355) having a strength higher than that of the reinforcing member (352) is disposed in the reinforcing member (352) in the shape of a wire, and the strength-enhancing member (355) is formed in the longitudinal direction of the straight edge (282) and can be embedded inside the reinforcing member (352).

[0099] FIG. 9 is an external perspective view illustrating an additional vibration reduction unit according to an embodiment of the present invention.

[0100] Referring to FIG. 9, as the vibration reduction unit (300) moves further away from the shaft (100) or support (240), it may be difficult to suppress vibrations and shaking generated in the blade member (280).

[0101] An additional vibration reduction unit (370) may be attached to the outer surface of the blade member (280) to suppress or prevent vibration and shaking.

[0102] The additional vibration reduction unit (370) can be formed, for example, in a strip shape or a rod shape.

[0103] One end of the additional vibration reduction unit (370) is connected to the vibration reduction unit (300), and the other end of the additional vibration reduction unit (370) is connected to the shaft (100) or the support (240).

[0104] At this time, the surface of the additional vibration reduction unit (370) is in close contact with the surface of the blade member (280) along the curvature of the outer surface of the blade member (280) so that air resistance is minimized.

[0105] As previously described, one end of the additional vibration reduction unit (370) is connected to the vibration reduction unit (300) and the other end of the additional vibration reduction unit (370) is connected to the shaft (100) or the support (240). However, alternatively, the other end of the additional vibration reduction unit (370) adjacent to the shaft (100) may be connected to the shaft (100) and connected to a connecting member (not shown) having a bushing shape that rotates together with the shaft (100).

[0106] Referring again to FIG. 1, the bracket (400) of the small wind turbine (600) rotatably supports both ends of the shaft (100) to which the previously described spiral blade (200) is fixed. For example, the bracket (400) is formed in a Y shape, and the bracket (400) may have a structure that changes direction in response to the direction of the wind.

[0107] One end of the shaft (100) is rotatably connected to a bracket (400) by a bearing (not shown), and the other end of the shaft (100) is rotatably connected to a bracket (400) by a bearing (not shown).

[0108] Referring again to FIG. 1, the generator (500) is fixed while supported by the bracket (400) and is rotatably coupled to the shaft (100) to generate power by the rotation of the shaft (100). In one embodiment of the present invention, one generator (500) is shown and described as being mounted on one side of the shaft (100), but the generator (500) may be positioned at one end and the other end of the shaft, respectively.

[0109] As explained in detail above, vibration, shaking, and noise caused by the rotation of the spiral blade and changes in wind pressure can be effectively reduced without connecting through holes or connecting rods to the spiral blade that generates rotational force by wind.

[0110] Meanwhile, the embodiments disclosed in this drawing are merely specific examples provided to aid understanding and are not intended to limit the scope of the invention. It is obvious to those skilled in the art that other variations based on the technical concept of the invention are possible in addition to the embodiments disclosed herein.

[0111] [Explanation of the symbol]

[0112] 100...Axis 200...Spiral Blade

[0113] 300...Vibration reduction unit 350...Reinforcement unit

[0114] 400...Bracket 500...Generator

Claims

1. It is coupled to a blade member that rotates the axis by wind in a spiral shape, and A spiral blade vibration reduction device comprising a vibration reduction unit that extends along the curved edge of the blade member positioned in the direction of wind inflow and reduces vibration of the blade member.

2. In Paragraph 1, The above vibration reduction unit includes a vibration reduction body having a shape corresponding to the curved edge and a coupling member that connects the vibration reduction body to the curved edge, A spiral blade vibration reduction device in which the stiffness of the above vibration reduction unit is greater than the stiffness of the above blade member.

3. In Paragraph 2, The vibration-reducing body comprises a first body portion in contact with one side surface of the blade member, a second body portion in contact with the other side surface of the blade member opposite to the one side surface, and a third body portion connecting the first and second body portions to form a concave coupling groove. In the above-mentioned third body part, a resistance reduction section is formed in which the cross-sectional area gradually decreases toward the top to reduce wind resistance, and A spiral blade vibration reduction device in which at least one of the second and third body parts of the vibration reduction body is formed with a deformation suppression part formed in a groove shape along the longitudinal direction of the curved edge to suppress deformation of the vibration reduction unit caused by external force.

4. In Paragraph 2, A spiral blade vibration reduction device comprising a bonding member including any one of an adhesive member having adhesive strength, a double-sided adhesive tape having adhesive strength, and a rubber sheet having an embossed pattern.

5. In Paragraph 1, The vibration reduction unit comprises a vibration reduction body disposed in a strip shape on at least one of one side surface of the curved edge and the other side surface facing the one side surface, and a coupling member for coupling the vibration reduction body to the curved edge. The stiffness of the above vibration-reducing body is formed to be greater than the stiffness of the above blade member, and A spiral blade vibration reduction device in which a resistance reduction section with a gradually decreasing cross-sectional area is formed in the part of the above-mentioned vibration reduction body facing the wind to reduce wind resistance.

6. In Paragraph 1, The length of the above vibration reduction unit is formed to be the same as the length of the above curved edge, and A connecting member having a bushing shape is coupled to the above shaft, and One end of the vibration reduction unit adjacent to the above shaft is integrally formed with the connecting member in a spiral blade vibration reduction device.

7. In Paragraph 1, A spiral blade vibration reduction device further comprising a reinforcing unit including a reinforcing member coupled to a straight edge connected to the above-mentioned curved edge and a coupling member coupling the reinforcing member to the straight edge.

8. In Paragraph 1, The above vibration reduction unit is a spiral blade vibration reduction device comprising a strength-enhancing member embedded in the vibration reduction unit in a wire shape having a strength higher than that of the vibration reduction unit, thereby improving rigidity.

9. In Paragraph 1, It further includes an additional vibration reduction unit having a band shape, one end of which is connected to the vibration reduction unit, and the other end opposite to the one end of which is connected to a connecting member coupled to the shaft. The above additional vibration reduction unit is a spiral blade vibration reduction device formed along the curvature of the outer surface of the blade member and in close contact with the surface of the blade member.

10. Axis; A spiral blade having a blade member coupled to the above shaft, formed spirally to generate rotational force by wind, and having a curved edge and a straight edge connected to the curved edge; and A spiral blade for a wind turbine comprising a vibration reduction unit that extends along the curved edge and reduces vibrations caused by the rotation of the blade member and wind.

11. In Paragraph 10, A support member is formed on the blade member that is coupled to the outer surface of the shaft, and The above support includes a first support, a second support, and a third support that are evenly divided and surround the outer surface of the shaft, and The blade member comprises a first blade member formed on the first support, a second blade member formed on the second support, and a third blade member formed on the third support. A spiral blade for a wind turbine, wherein the sides of the first to third supports coupled to the shaft are arranged facing each other, and the first to third blade members are arranged to overlap the shaft.

12. In Paragraph 10, The vibration reduction unit comprises a vibration reduction body that wraps at least a portion of the curved edge and a coupling member that connects the vibration reduction body to the curved edge. A spiral blade for a wind turbine, wherein the cross-section of the above-mentioned vibration reduction unit is formed as a U-shape, an L-shape, or an I-shape.

13. In Paragraph 10, A spiral blade for a wind turbine, further comprising a reinforcing unit including a reinforcing body that wraps around at least a portion of the straight edge and is connected to the vibration reduction unit, and a connecting member that connects the reinforcing body to the straight edge.

14. Axis; A spiral blade having a blade member formed in a spiral shape to generate rotational force by wind, and having a curved edge and a straight edge connected to the curved edge; A vibration reduction unit extending along the curved edge to reduce vibrations generated by the rotation of the blade member and wind; A reinforcing unit extending along the straight edge to reduce vibration of the spiral blade; A bracket that rotatably supports both ends of the above shaft; and A small wind power generator comprising a generator that is supported by the above bracket and coupled to the above shaft to generate electricity using the rotational force of the above shaft.

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