KR101592289B1 - Spiral blade unit and method for making the same - Google Patents

Abstract

Disclosed is a method for making a spiral blade unit, which can securely fixate a spiral blade on an outer circumferential surface of a rotational shaft without an additional frame, a bolt, and a nut to prevent the rotational shaft from being weakened, reduce a weight of a spiral blade unit, and smoothly fixate spiral blades on an outer circumferential surface of the rotational shaft. The method for making a spiral blade unit comprises the following steps of: making each of spiral blades; preparing a rotational shaft of which unevenness is formed on an outer circumferential surface; and fixating the spiral blades and the rotational shaft to a jig in a posture for the spiral blades and the rotational shaft to be attached to each other, and further, comprises a blade fixating step of fixating the spiral blades to an outer circumferential surface of the rotational shaft by adding and repeatedly stacking a FRP forming material on a root portion of the spiral blades and an outer circumferential surface of the rotational shaft with a FRP forming method.

Description

[0001] Spiral blade unit and method for making same [0002]

The present invention relates to an improvement of a spiral blade unit and a manufacturing method thereof, and more particularly, to an improvement of a spiral blade unit which can be suitably used for a wind power generator and a manufacturing method thereof.

Various types of wind turbines are known for generating wind. The present invention relates to a horizontal axis wing unit having a spiral wing. Prior art relating to the individual spiral wings referred to in the present invention is described in detail in the international publication publication of WO 2011/142653 A1 (hereinafter referred to as "the original invention"). The technical content related to the individual wings described in the abovementioned International Publication is hereby incorporated by reference into the above-mentioned International Publication as a prior art of the present invention.

Generally, a wind turbine generator includes a blade unit which is coupled to a rotary shaft and a rotary shaft, is disposed around the rotary shaft, and has a plurality of blades for obtaining rotational force from the wind.

It is very difficult to make the entire wing unit into a single body by the injection molding or casting method because of its complicated shape and the arrangement structure of the wings which are attached to the outer circumferential face of the rotating shaft in plural,

Therefore, the individual spiral wings should be separated from the rotating shaft and fixed firmly to the outer circumferential surface of the rotating shaft at a predetermined angular interval. In order to securely attach the helical wing to the outer circumference of the rotary shaft, the frame was mounted on the outer circumferential surface of the hexagonal section of the rotary shaft using bolts, and an attempt was made to fix the root portion of each wing to the frame with bolts and nuts. There is a problem in that the strength of the rotating shaft is weakened, the weight of the helical wing unit is increased due to the use of a large number of bolts and nuts, the bolt and nut are loosened during long use, And it takes time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spiral wing unit having a structure in which a spiral wing can be firmly fixed to an outer circumferential surface of a rotating shaft without using a separate frame, a bolt and a nut.

Another object of the present invention is to provide a method of manufacturing a spiral wing unit capable of firmly attaching a spiral wing to an outer circumferential surface of a rotary shaft without using a separate frame, bolts and nuts.

It is still another object of the present invention to provide a method of manufacturing a spiral wing unit in which a spiral wing attached to an outer circumferential surface of a rotary shaft can be firmly attached to an outer circumferential surface of a rotary shaft by a FRP molding method without causing relative displacement with respect to the rotary shaft.

The present inventor has found that the wing unit to which the spiral wing is applied has a very large ratio of the wind receiving area in the rotating region of the wing as compared with the wing unit to which the general wing is applied. It has been noted that there can be a problem that the wing is broken due to the occurrence of severe vibration due to the imbalance of the acting force. The present invention also has an object to solve such a problem.

It is still another object of the present invention to provide a spiral wing unit in which less vibration is generated in a spiral wing and the possibility of blade damage due to vibration is small.

Another object of the present invention is to provide a wing connector capable of supporting helical wings together and firmly supporting them.

A method of manufacturing a spiral wing unit according to the present invention includes the steps of: preparing spiral wings, respectively, in a method of manufacturing a spiral wing unit by fixing spiral wings around a rotation axis; Preparing a rotating shaft having an uneven surface on an outer peripheral surface thereof; Fixing the spiral wings to the jig in a posture for attaching the rotary shaft to each other; And a blade fixing step of fixing the helical blades to the outer circumferential surface of the rotating shaft by repeatedly laminating the FRP molding material over the roots of the helical blades and the outer circumferential surface of the rotating shaft having the concavities and convexities by an FRP molding method.

It is preferable that the irregularities include a thread.

The helical wings are preferably made of FRP.

The helical wing unit according to the present invention is a helical wing unit having a rotating shaft and a plurality of helical wings attached with roots along the outer circumferential surface of the rotating shaft, wherein the root portion of the helical wings and the outer circumferential surface of the rotating shaft are formed by adding an FRP molding material by an FRP molding method And the FRP laminated portion is formed on the outer circumferential surface of the rotating shaft so as to be firmly fixed to the FRP laminated portion.

It is preferable that the irregularities include a thread.

The helical wings are preferably made of FRP.

And a plurality of vane connectors for connecting the outer edges of the helical wings toward the rotation axis and supporting the outer edges of the spiral wings in an inclined direction with respect to the rotation axis.

The vane connector may include a connecting rod passing through two or more vanes and having a spiral formed on an outer circumferential surface thereof, a washer coupled to the outer circumferential surface of the connecting rod, and a nut coupled to the spiral and pressing the washer toward the vane surface .

Wherein the wing connector includes a connecting rod having two or more blades penetrating therethrough and having a helix formed on an outer circumferential surface thereof, an inclined member coupled to an outer circumferential surface of the connecting rod and in surface contact with the blade surface, a washer disposed on the outer circumferential surface of the connecting rod, And a nut coupled to the spiral and pressing the washer and the inclined member toward the blade surface.

At times, instead of the inclined member, an inclined portion in the form of an inclined member can be integrally formed on the blade surface. Particularly, when the helical wing is made by the injection molding method, the inclined portion in the form of a projection having an inclined surface on the wing surface can be integrally formed.

The wing connector may include a connecting rod having two or more blades penetrating therethrough and having a spiral formed on an outer circumferential surface thereof, a first spherical member coupled to the outer circumferential surface of the connecting rod and having a spherical surface in contact with the blade surface, A second spherical member coupled to the first spherical member and having a concave or convex spherical surface formed on the inner surface thereof to engage with the convex or concave spherical surface, a washer and a second spherical member coupled to the outer circumferential surface of the connecting rod and disposed outside the second spherical member, And a nut coupled to the helix to press the first and second spherical members and the washer toward the blade surface.

The wind turbine according to the present invention comprises a spiral blade unit according to the present invention; A support frame for horizontally and rotatably supporting both ends of the rotary shaft of the helical wing unit; And a generator connected to the rotating shaft and generating electric power.

Preferably, the support frame is rotatable about a vertical axis.

A brake for maintaining the rotation of the RPM measuring unit and the helical blade unit at a constant RPM or less may be installed on one side of the rotary shaft.

According to the present invention, it is possible to firmly fix the helical wing to the outer circumferential surface of the rotary shaft without using a separate frame, bolts and nuts, to prevent the rotation shaft from weakening, to reduce the weight of the helical wing unit, It is also easy to fix it on the outer circumferential surface of the rotating shaft.

According to the present invention, by attaching the helical wing with the FRP molding method in the state where the outer circumferential surface of the rotating shaft is formed with irregularities, particularly, threads, the helical wing can be firmly attached to the outer circumferential surface of the rotating shaft.

According to the present invention, it is possible to easily and firmly support the helical wings by connecting and supporting them through the wing end connection, thereby preventing the helical wing from shaking and preventing the wing from being damaged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a process for manufacturing a spiral wing unit according to the present invention;
Figs. 2 (a) to 2 (f) show a process of forming a helical blade by an FRP molding method,
3 is a perspective view showing a helical blade formed by the FRP molding method,
FIG. 4 is a photograph showing a rotating shaft having a thread formed on an outer peripheral surface thereof and three spiral wings mounted on a jig,
5 is a photograph showing the wings connected to the wing connector,
FIG. 6 is an enlarged view of a portion where the blade coupling is engaged with the helical blade,
Fig. 7 is a perspective view showing the inclined member and the washer of Fig. 6,
8 is a partially enlarged view for explaining a modified example of the blade connector,
9 is a side cross-sectional view illustrating a wind power generator using a spiral blade unit according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a process diagram showing a process of manufacturing a spiral blade unit according to the present invention.

First, helical wings for mounting on the outer circumferential surface of the rotating shaft are manufactured. Preferably three spiral wings are used in one spiral wing unit. An example of a preferred spiral blade manufacturing process will be described later with reference to Figures 2 (a) to 2 (f). In addition to the method described with reference to FIG. 2 (a) to FIG. 2 (f), various other methods such as a method using an injection mold may be used for manufacturing the helical wings. The completed spiral wing is shown in Fig. 3 (S1).

On the other hand, a rotating shaft having an uneven surface is formed on the outer peripheral surface. The main purpose of forming the irregularities is to make it possible to firmly attach the helical wings to the outer peripheral surface of the rotary shaft. The irregularity of this purpose not only increases the joint area of the joint portion where the helical wing is fixed, but also prevents the joint portion from causing relative displacement with respect to the surface of the rotary shaft. The concavity and convexity acting as such may be used in which grooves or projections are repeatedly formed in the circumferential direction along the outer circumferential surface of the rotary shaft, in the longitudinal direction or in the inclined direction of the rotary shaft, or by mixing them. As shown in Fig. 4, it is preferable to use a thread formed along the outer circumferential surface of the rotating shaft (S2).

When the spiral wings and the rotary shaft having the unevenness on the outer circumferential surface are prepared, the spiral wings and the rotary shaft are set and fixed to each other using a jig as shown in FIG. 4 (S3).

While fixed to the jig, the FRP molding material is repeatedly laminated over the roots of the helical blades and the outer circumferential surface of the rotating shaft where the concavities and convexities are formed, and the helical blades are fixed to the outer circumferential surface of the rotating shaft. More specifically, the FRP molding resin is applied over the roots of the spiral wings and the outer circumferential surface of the rotating shaft where the concavities and convexities are formed, and a fabric such as glass fiber is attached thereon and the process of applying and impregnating the resin to the attached fabric is repeated several times And the resin is cured to fix the helical blade to the outer circumferential surface of the rotating shaft (S4).

(FRP) molding material (glass fiber, carbon fiber, reinforcing materials such as basalt, unsaturated polyester, epoxy, epoxy acrylate resin, catalyst for curing resin and accelerator etc.) and hand lay up ) Method, a spray-up method, and a lining method are well known in the prior art and are not described in detail here.

In the state where the helical wings are fixed to the outer circumferential surface of the rotating shaft where the projections and depressions are formed, as shown in Fig. 5, the wing connector is installed in a direction inclined with respect to the rotation axis from the outside through the hole formed at the outer edge of the helical wings And the wings are connected and supported to each other, the spiral wing unit according to the present invention is completed (S5).

Figs. 2 (a) to 2 (f) show a process of forming a helical blade by an FRP molding method, and Fig. 3 is a perspective view of a helical blade formed by a FRP molding method.

In order to form the helical wings by the FRP molding method, glass fibers, carbon fibers, and basalt fibers (hereinafter referred to as " fabrics " Cut according to the development of the spiral blade as shown in a). The material 31 made of glass fiber or the like has a thickness of about 1 mm.

As shown in Fig. 2 (b), the FRP molding resin 40 is applied and impregnated to the fabric 31 of the cut glass fiber or the like.

A single layer of the cut fabric 32 is further laminated as shown in Fig. 2 (c) on the raw fabric impregnated and impregnated with the resin, and the resin 40 is applied and impregnated.

Thereafter, as shown in Fig. 2 (d), one cut of the cut fabric 33 is laminated in three stages, and the added fabric is impregnated with the resin. If it is necessary to increase the strength of the spiral wing or to increase the thickness, it is possible to further laminate the fabric and apply the resin to impregnate it.

2 (e), the laminated material 30 is shaped so as to have a spiral wing shape by placing the laminated material 30 on the mold 50 in the form of a spiral wing as shown in FIG. 2 (e).

The fabrics 31, 32, and 33 cut on the mold 50 in the form of a wing may be used in addition to molding the laminated material 30, which has been separately stacked as described above, It is also possible to form the blades while laminating them directly in order.

The laminated material 30 is cured for a predetermined time in a state where it is bonded to the mold 50 as shown in FIG. 2 (f) and then removed from the mold 50 to complete the spiral wing 110 as shown in FIG. In this way, the required number of helical blades 110 are made.

Since the outer edge of the helical wing 110 receives a relatively larger force than the inner portion at the time of rotation, it is preferable to form the rim 112 along the outer edge of the FRP material as shown in Fig.

FIG. 4 is a photograph showing a rotating shaft having a thread formed on the outer circumferential surface thereof, three spiral wings mounted on the jig, and FIG. 5 is a photograph showing the wings connected to the wing connector.

The process of making the spiral blade unit 100 according to the present invention will be described in more detail with reference to FIGS. 4 and 5. FIG.

The helical blade 110 made by the method described with reference to FIGS. 2 and 3 grinds along the root portion 114 of a certain width so as to be adhered to the FRP forming layer formed for attaching to the rotating shaft 120. At this time, the thickness of the root portion 114 gradually decreases toward the inner side. When the rim 112 is to be formed, the grinding is also performed along the edge of the spiral wing 110. Then, the spiral wings 110 are mounted on the jig 60 as shown in Fig.

The jig 60 has a lower jig 61 which can vertically support the rotary shaft 120 by inserting the rotary shaft 120 into the central groove 62 and a through hole through which the rotary shaft 120 can pass, And an upper jig 65 in which the wing support grooves 66 are formed at intervals of 120 degrees.

The purpose of using the jig 60 is to maintain the posture in the same state that the helical blades 110 are attached to the outer circumferential surface of the rotation axis 120. Therefore, the posture of the rotation axis 120 and the helical blades 110 Other shapes may be used as long as the spiral wings 110 can be maintained in the same state as the spiral wings 110 are attached to the outer peripheral surface of the rotation shaft 120. It is possible to use a method in which the spiral blades 110 are set one by one and are attached to the outer circumferential surface of the rotating shaft in order. However, since the working efficiency is low and the working process thereof is very difficult, It is preferable to perform an operation of bonding and fixing to the outer peripheral surface of the rotary shaft 120 in a state where all three spiral wings 110 are set at once.

The resin is applied over the roots of the helical wings 110 and the outer circumferential surface of the rotating shaft 120 on which the threads 122 are formed and the fabric of the reinforcing material such as glass fibers cut in the form of strips is wound on a spiral wing The reinforcing material is attached to the outer peripheral surface of the rotating shaft 120 formed with the root portion 114 of the reinforcing member 110 and the thread 122. The reinforcement material is impregnated and impregnated with a reinforcing material such as glass fiber, The FRP lamination portion 130 as shown in FIG. 5 is formed so that the helical blade 110 is fixed to the outer circumferential surface of the rotating shaft 120. The FRP lamination portion 130 shown in FIG. If necessary, the rim 112 is also molded in the same manner.

The thread 122 increases the joint area of the FRP laminate part 130 and prevents the relative displacement of the FRP laminate part 130 with respect to the rotation axis 120. [ That is, the thread 122 serves to firmly attach the helical blade 110 to the outer circumferential surface of the rotary shaft 120. These threads 122 may be formed over the entire length of the spiral wing 110, but sometimes the threads 122 may not be formed in some spans, and threads may be formed in opposite directions have. At some point, it is desirable that the forming direction of the threads 122 be formed such that the direction of rotation of the helical vanes 110 is the fastening direction.

Furthermore, the rotation preventing structure may be provided at one end or both ends of the rotating shaft 120 to prevent the FRP laminated portion 130 from rotating relative to the rotating shaft 120 to be displaced. As the anti-rotation structure, an end may be formed at the end of the FRP lamination part 130, or a fin or the like may be provided.

Instead of the thread 122, grooves or protrusions arranged in the circumferential direction on the outer circumferential surface of the rotary shaft 120 may be formed at intervals in the longitudinal direction of the rotary shaft 120, and protrusions or grooves in the longitudinal direction of the rotary shaft 120, Shaped concavo-convex portion may be formed, or two or more kinds of concavo-convex portions may be mixed and formed.

Methods such as sand blasting, steel grit blasting, and grooving may be used to form the irregularities other than the threads.

Meanwhile, the inventor of the present invention has found that the spiral blade unit 100 according to the present invention has a large wind receiving area, so that when the wind is blown hard, the force received by each spiral blade 110 It was found that the helical wings 110 were shaken unlike the conventional wind turbine blades. It has also been observed that the spiral wings (110) can be damaged if the vibration is repeated.

The present inventor has considered to increase the thickness of the spiral wing 110 in order to solve the wobble phenomenon of the spiral wing. However, when the thickness of the spiral wing 110 is increased, the power generation efficiency is lowered, It is also difficult to carry wings.

The present inventor has found a way to solve the tremble phenomenon of the spiral wings 110 without increasing the thickness of the spiral wings so that the outer edges of the spiral wings 110 through the wing fittings 140 according to the present invention And a method of reinforcing by connecting them to each other in an oblique direction with respect to the rotation axis toward the rotation axis 120.

In the present embodiment using three spiral wings 110, three wing connectors 140 may be used to install the wing connectors at three angular intervals of 120 degrees. If necessary, You can install three more, one at a time. Since the portion of the spiral wing 110 which is most likely to be most disturbed in the state where the spiral wing 110 is attached to the rotary shaft 120 is the furthest portion of the rotary shaft 120, And a neighboring spiral wing (110), and a wing connector (140) is installed through the holes to support the spiral wings (110). Sometimes the holes may be formed before the spiral wing 110 is attached to the rotating shaft 120.

The wing connector 140 includes a connecting rod 141 passing through two or more helical blades 110 and having a spiral 142 formed on the outer circumferential surface thereof and a nut 143 coupled to the spiral. .

Fig. 6 is an enlarged view of a portion where the vane coupling is engaged with the spiral vane; and Fig. 7 is a perspective view showing the inclined member and the washer of Fig.

Referring to FIG. 5, the wing connector 140 according to the present invention has a connecting rod 141 passing through two or more helical blades 110 and having a spiral 142 formed on the outer circumferential surface thereof. It is preferable that the screw thread 142 is formed only in a part where the nut 143 is fastened. The wing connector (140) according to the present invention is equipped with an inclined member (144). The inclined member 144 compensates for the inclined arrangement of the surface of the helical blade 110 while changing the radius of curvature along the circumferential direction so that the washer 145 and the nut 143 are moved toward the center of the rotary shaft 120 120 so as to uniformly apply force to the wing surface in an inclined direction. This inclined member 144 is a portion that is in surface contact with the surface of the helical blade 110, and its appearance is shown in Fig. As can be seen from Figs. 6 and 7, the tapered member 144 has a hole 144a for allowing the connection rod 141 to pass through at its central portion, and has a wedge shape. The inclined member 144 may be made of a rubber material having elasticity such as polyurethane or aluminum, and may be made of plastic or iron. Preferably, a groove is formed in the upper surface of the inclined member 144 so as to mount a washer. Instead of the inclined member 144, an inclined part in the form of an inclined member may integrally be formed on the surface of the helical blade 110. In this case, the inclined portion will have the form of a projection having an inclined surface. This is especially true when making spiral wings 110 in an injection mold manner.

A washer 145 is coupled to the outer side of the inclined member 144 and a nut for pressing the washer 145 and the inclined member 144 toward the surface of the spiral blade 110 is coupled to the spiral 142 outside the inclined member 144 143). In addition, a nut relief pin 146 is coupled to the connecting rod 141 to prevent the nut 143 from being loosened and the connection between the helical blades 110 being nipped. The spiral wing 110 is primarily deformable outwardly, although the inclined member 144, the washer 145, the nut 143, and the nut-preventing fins 146 may be provided on both surfaces of the spiral wing 110. [ It is also possible to install the sensor on only the outer part in general.

Instead of the nut releasing prevention pin 146, a method of forcibly inserting a silicone filler into the fastening portion and covering the cover may be used. At this time, a nylon insert net known as Nylock nut, which is commercially available, is suitable for the nut 143.

In addition to this, it is possible to consider using a double nut, but this is not preferable to the one described above in terms of completely ensuring the prevention of loosening of the nut. It is also possible to use a method of fixing the nut to the bolt by welding, a method of bending the end of the connecting rod 141, a method of damaging the thread, and a method of fixing the member of "U" shape to the edge of the wing, There are advantages and disadvantages according to the method, so it can be selected according to the size and the usage of the helical wing unit.

Furthermore, a chemical bonding method using an adhesive such as Loctite can be used.

It is preferable to use the inclined member 144 as much as possible in order to improve the durability and durability. However, the inclined member 144 may not be used at times. There is no significant structural problem even if the inclined member 144 is not used.

8 is a partial enlarged view for explaining a modified example of the blade connector.

In some cases, the wing connector 140 according to the present invention can be constructed using members having spherical surfaces instead of the inclined members described in Figs. 6 and 7.

That is, the wing connector 140 according to the present invention has a connecting rod 141 passing through two or more helical blades 110 and having a spiral 142 formed on the outer circumferential surface thereof. A first spherical member 147 is coupled to the outer circumferential surface of the connecting rod 141 on the inner surface side of the helical blade 110. The inner surface of the first spherical member 147 is in surface contact with the surface of the helical blade 110. The outer surface of the first spherical member 147 is formed as a convex spherical surface convex to the outside. A second spherical member 148 having a concave spherical surface formed outside the first spherical member 147 is provided. The concave spherical surface is engaged with the convex spherical surface to compensate the inclination of the surface of the helical blade 110 so that the washer 145 and the nut 143 are moved toward the center of the rotational shaft 120 and in a direction inclined to the rotational axis 120 And serves to uniformly apply force. The positions of the concave spherical surface and the convex spherical surface can be changed with each other. The wing connector 140 according to the present invention includes a washer 145 coupled to the outer circumferential surface of the connecting rod 141 and disposed outside the second spherical member 148 and a second spherical member 147 And a nut 143 that presses the washer 145 toward the surface of the spiral blade 110.

The remainder is the same as described in FIGS. 6 and 6.

9 is a side cross-sectional view illustrating a wind power generator using a spiral blade unit according to the present invention.

The wind turbine generator 200 shown in Fig. 9 is equipped with the spiral blade unit 100 according to the present invention. The spiral wing unit 100 is installed such that both ends of the spiral wing unit 100 are supported by the support frame 150 in a state in which the rotation shaft 120 is horizontally disposed and rotatable about the rotation axis 120.

A generator 160 is coupled to one end of the rotary shaft 120, and an RPM meter 170 is installed at the other end. Preferably, a brake is further provided on the other end of the rotary shaft 170 so as not to exceed a certain RPM even when the wind speed is very high. If the wing rotates too fast, the wings may be damaged.

A rotation stopping brake for stopping the rotation of the spiral wing unit 100 may be further provided when necessary for inspection or repair. It goes without saying that the generator 160 and the brakes can be installed by changing their installation positions. In some cases, the generator 160 and the brakes may be installed on the same side.

The support frame 150 is coupled to a vertical axis 182 that is rotatably mounted to the support 180 and is rotatable about a vertical axis 182.

Accordingly, the spiral blade unit 100 according to the present invention rotates the vertical axis 182 in the direction of the wind in a state in which the spiral blade unit 100 can rotate about its own rotation axis 120 while being supported by the support frame 150 It can rotate in the horizontal direction with the center as the center.

In the state of FIG. 9, when the wind is blown in the direction of the arrow, the spiral blade unit 100 according to the present invention generates power by driving the generator 160 while rotating around the rotation axis 120 in the state of FIG. The rotational speed of the rotating shaft 120 is measured and displayed by the RPM measuring device 170. The amount of power generated according to the intensity of the wind can be calculated by referring to the measured data and the amount of power generated by the RPM measuring unit 170 and utilized for the management of the wind power generator 160.

When the direction of the wind blowing in the direction of the arrow changes, the spiral blades 110 are unbalanced in the force of the wind received from the left and the right. Accordingly, the spiral blade unit 100 according to the present invention rotates about the vertical axis 182 Thereby balancing the forces acting on the spiral wings 110 from side to side.

Accordingly, the spiral vane unit 100 according to the present invention is supported by the support frame 150, and is automatically rotated in the direction of wind blowing around the vertical axis 182.

The present invention is likely to be used in the manufacture of spiral wing units that are used to convert the flow of fluids, particularly wind, into kinetic energy and obtain electrical energy therefrom.

100: Spiral wing unit 110: Spiral wing
120: rotation axis 122:
130: FRP laminated portion 140: wing connector
150: support frame 160: generator
170: RPM Meter 180: Holding
182:

Claims (13)

In the method of making the helical wing unit by fixing the helical wings around the rotational axis,
Fabricating each of the spiral wings;
Preparing a rotating shaft having an uneven surface on an outer peripheral surface thereof;
Fixing the spiral wings to the jig in a posture for attaching the rotary shaft to each other; And
And a blade fixing step of fixing the helical blades to the outer circumferential surface of the rotating shaft by repeatedly laminating the FRP forming material over the roots of the helical blades and the outer circumferential surface of the rotating shaft having the concavities and convexities by an FRP molding method, Unit manufacturing method. The method for manufacturing a spiral blade unit according to claim 1, wherein the irregularities include threads. The method of claim 1 or 2, wherein the helical wings are made of FRP. In a spiral wing unit having a rotating shaft and a plurality of helical wings attached with a root portion along the circumferential surface of the rotating shaft,
Wherein the root portion of the helical wings and the outer circumferential surface of the rotating shaft are fixed to each other by an FRP laminated portion formed by repeatedly laminating the FRP molding material while the FRP molding material is added thereto,
And a ridge and groove for firmly fixing the FRP laminated portion is formed on an outer circumferential surface of the rotating shaft. The spiral wing unit according to claim 4, wherein the irregularities include threads. The spiral wing unit according to claim 4, wherein the helical wings are made of FRP. The spiral wing unit according to claim 4, further comprising a plurality of wing connectors for connecting outer edges of the helical wings toward the rotation axis and supporting the outer edges of the helical wings in an inclined direction with respect to the rotation axis. The wing connector according to claim 7, wherein the wing connector includes a connecting rod penetrating at least two blades and having a spiral formed on an outer circumferential surface thereof, a washer coupled to an outer circumferential surface of the connecting rod, and a nut coupled to the spiral to press the washer toward the wing surface And the spiral wing unit is configured to rotate the spiral wing unit. The wing connector according to claim 7, wherein the wing connector comprises: a connecting rod penetrating at least two blades and having a spiral formed on an outer circumferential surface thereof, an inclined member coupled to the outer circumferential surface of the connecting rod and in surface contact with the blade surface, And a nut coupled to the spiral and pressing the washer and the slope member toward the blade surface. The wing connector according to claim 7, wherein the wing connector comprises: a connecting rod having two or more blades penetrating therethrough and having a helix formed on an outer circumferential surface thereof; a first spherical member coupled to an outer circumferential surface of the connecting rod and having a spherical surface in contact with the blade surface, A second spherical member coupled to an outer circumferential surface of the connecting rod and disposed outside the first spherical member and having a concave or convex spherical surface formed on the inner surface thereof to engage with the convex or concave spherical surface, And a nut coupled to the washer and the spiral to press the first and second spherical members and the washer toward the blade surface. A spiral wing unit according to any one of claims 4 to 10;
A support frame for horizontally and rotatably supporting both ends of the rotary shaft of the helical wing unit; And
And a generator connected to the rotating shaft and generating electric power. 12. The wind turbine generator of claim 11, wherein the support frame is rotatable about a vertical axis. 13. The wind power generator according to claim 12, wherein a brake is provided on one side of the rotating shaft to maintain the rotation of the RPM measuring unit and the spiral blade unit at a constant RPM or lower.

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