KR101206701B1 - Wind Power Generation Apparatus for Low Wind Speed - Google Patents

Abstract

PURPOSE: A wind power generator with a low wind velocity is provided to increase the efficiency of wind power generation regardless of the wind direction and places, and to increase a power coefficient as the drag and lift of the wind are used at the same time. CONSTITUTION: A wind power generator with a low wind velocity comprises a center shaft(100), a connection arm(400), drag blades(200a,200b), a wind capture(300), and a power generation module(500). The center shaft is rotationally supported, and generates rotary moment. The connection arm is connected to the upper and lower ends of the center shaft. The drag blades are connected to the connection arm, and form an overlap area at a fixed ratio. The wind capture is installed in the drag blades in a longitudinal direction. The wind capture is recessed toward the rotary direction of the drag blade in order to increase the rotary moment. The power generation module is placed in the extended line of the center shaft, and generates electricity by the rotary moment from the center shaft.

Description

Wind Power Generation Apparatus for Low Wind Speed

The present invention relates to a low wind speed wind turbine generator, more specifically, to increase the energy conversion efficiency by using the drag and lift of the wind at the same time, and effectively wind power even in small winds without being bound to the direction of the wind or a specific region or location The present invention relates to a low wind speed wind turbine generator capable of generating high temperature.

The natural element of wind is infinitely clean, so wind energy is valued as an alternative. Wind power is free of air pollution and produces no hazardous waste. As such a new alternative energy generation method, wind power generation has sufficient potential, but wind power generation is unlike the existing generation due to the variability in the wind speed and the low wind speed (2 ~ 6m / sec small wind) of Korea. The role of self-generators (capacity generation) in capacity credit and the effective capacity of resources to cope with net reserve reserves cannot be completely replaced. Therefore, the Korean-style development of economic and efficient wind turbines for distributed generation networks is urgent.

In fact, in Korea, the annual average wind speed is 2-6m / sec, but the wind turbine generator for wind speeds of 12m / sec or more, which is less than 20 days a year, is installed with over-capacity generators that are about 4 times larger than large ones. In the case of small and medium-sized, too much waste to be installed uneconomically installed by the over-capacity generator. Although the power generation capacity of each of the world's wind turbine makers, Vestas and other well-known manufacturers, is being released in accordance with more than 12m / sec, in fact, according to the Korea Meteorological Agency data, the annual average wind speed of Korea is 2-6m / sec. It cannot be productive. At the same time, Busan and Jeju, which have high average wind speeds, are not consistent in the direction of the wind, causing a lot of yawing. It is also reported that the generator fails due to immediate yawing. There is no wind turbine for power generation that operates regardless of the direction of the wind and has been developed for the domestic situation with higher energy and efficiency at low speed.

In Korea, the wind direction changes frequently, the Reynolds number changes, and the annual average is low wind speed, but it is very burdensome for the global green growth flow that requires the use of natural energy to give up wind resources. Therefore, in Korea's average wind speed, large-capacity wind power generators with insufficient starting torque are installed in Korea's wind farms. It's a sad reality.

Therefore, the aerodynamic design of the blade, which is an essential element of the wind power generator that uses the kinetic energy of the wind, is a very important part that determines the performance of the whole system. There is an urgent need for a technology for a wind power generator that can use wind resources more efficiently even at a low wind speed of 8 m / sec.

Korean Publication Patent: 10-2011-0002745 (published 2011.01.10)

Korea Patent Registration: 10-0813924 (Notice date 2008.03.18)

The present invention has been made to solve the conventional problems,

An object of the present invention is to provide an airfoil-type wind capture to generate a lift force in the drag blade that is fixed in the same rotational direction by forming an overlap region based on the center shaft, so that the drag and lift of the wind can be used simultaneously. It is to provide a low wind speed wind turbine generator that can accelerate the output coefficient of and improve the efficiency of wind power even with small winds without being dependent on the direction of the wind or a specific region or location.

A low wind speed wind turbine generator of the present invention provided to achieve the above object, the wind turbine generator for generating power by the wind, the wind turbine is supported in a rotatable state to generate a rotation moment; A connection arm coupled to the upper and lower ends of the center shaft and used as a coupling means of the drag blade; A plurality of drag blades coupled to the connection arm and fixed in one rotational direction by forming overlap regions of a predetermined ratio with respect to the center shaft to increase the rotation moment; An air foil-shaped wind cap provided in the body of the drag blade in a longitudinal direction and concave toward the drag blade rotation direction to increase a rotation moment caused by wind power; And a power generation module positioned on an extension line of the center shaft and generating power by receiving a rotation moment of the center shaft.

The connecting arm has a disc shape, a through hole through which the center shaft penetrates is formed in the center of the disc, and a fastening hole through which the shaft holder fixed to the center shaft is fastened is formed on the outer side of the disc. A bolt hole is formed along the surface to which the drag blade is coupled.

Coupling of the integrated connection arm and the central shaft is a pair of shaft holders having a coupling hole formed on the upper surface is fixed to the central shaft, the coupling hole formed on the upper surface of the shaft holder and the fastening hole formed in the integrated connection arm by bolts It is characterized by combining.

The connecting arm is formed in the shaft coupling portion is coupled to the central shaft, the support is evenly connected to the outer surface of the shaft coupling portion, is coupled to the support and is formed in one direction of rotation by forming an overlap region based on the central shaft Characterized in that the assembly is composed of the first, the second connection arm is provided with an airfoil-shaped wind capture concave toward the rotation direction.

Here, the support is configured in the assembled connection arm is characterized in that the cross-section is formed in the shape of an air foil as a means for coupling the assembled connection arm, the drag blade and the center shaft.

In addition, the assembled connection arm is characterized in that a plurality of bolt holes having a twist at an angle of 1 ° to the upper surface of the first, second connection arm is formed.

The assembled connecting arm is characterized in that the plurality of connecting arms are assembled in a twisted form by twisting at a predetermined angle within the range of 1 ° to 19 °.

The overlap ratio of the overlap area of the drag blade is the semi-circle diameter (d) when the central axis, which is the central shaft, is composed of shafts. When divided and formed, if the central axis is a shaft shaft is supported by the drag blades configured without a shaft, it is characterized by being formed by dividing the overlapping X-axis spacing (e) between semicircles by the semi-circle diameter (d). Here, the overlap ratio of the overlap area of the drag blade is preferably made within 5% to 34%.

The drag blade has an outward end portion extending from the semicircle, and the extension angle θ is preferably extended from -3 ° to 35 ° from the center point of the semicircle.

The drag blades are preferably formed at intervals of -5/110 to 1/5 of the drag blade semicircle diameter d between the Y-axis spacing (a) between the semicircles.

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The drag blade may be formed in an upright form parallel to the longitudinal direction of the central shaft.

In addition, the drag blade may form a multi-stage of large blocks in the longitudinal direction, the large block unit may be formed in a form twisted at an angle of 60 ° to 180 ° with respect to the neighboring large block unit.

In addition, the drag blade forms a multi-stage of small block units in the longitudinal direction, and the small block unit may be twisted at a predetermined angle within a range of 1 ° to 19 ° with respect to a neighboring small block unit.

The low wind speed the wind turbine generator is characterized in that it can be installed in any one of the vertical and horizontal angles, including the vertical and horizontal.

According to the low wind speed wind power generation device of the present invention, not only to accelerate the output coefficient of the wind power generation by using the drag and lift of the wind at the same time, but also the efficiency of the wind power generation in the small wind without being bound to the direction of the wind or a specific region or location. It can increase the effect.

In addition, it is possible to easily form drag blades of various sizes by stacking as many as necessary, thereby improving blade installation efficiency and reducing work costs, and at a low cost regardless of location or location. It is possible to install the power generation device, which is economical and environmentally friendly.

In addition, drag blades equipped with airfoil-type windcaptures are easily manufactured by extrusion injection of aluminum or plastic, and can be variously manufactured by FRP or post-processing, and injection by mold during mass production. This can not only improve productivity, but also intermediate parts made of iron or aluminum such as shaft holders can produce cost-competitive products by precise processing using lasers.

1 is a perspective view of a low wind speed the wind turbine generator according to an embodiment of the present invention.
2 (a), (b) is a view for explaining the overlap ratio, extension angle, Y-axis spacing of the drag blade in the low wind speed wind turbine generator according to an embodiment of the present invention.
3 is a view for explaining the wind capture in the low wind speed the wind turbine generator according to the present invention.
4A and 4B are views for explaining various embodiments of the wind capture in the low wind speed the wind turbine generator according to an embodiment of the present invention.
5 is a view for explaining the direction and action of the wind passing through the overlap region of the wind capture and the drag blade in the low wind speed the wind turbine generator according to an embodiment of the present invention.
6 (a), (b) is a view for explaining the assembly of the integrated connection arm and the drag blade in the low wind speed wind turbine generator according to an embodiment of the present invention.
7 is a view for explaining the assembly of the assembled connection arm and the drag blade in the low wind speed the wind turbine generator according to an embodiment of the present invention.
FIG. 8 is a view for explaining a twist angle of an assembly groove formed in the assembly type connecting arm of FIG. 7.
FIG. 9 is a view illustrating that the drag blade and the assembled connection arm, which are stacked in multiple stages of a small block unit as shown in FIG. 12 (c), are assembled at a 5 degree twist angle.
10 is a view showing the direction and action of the drag type blade wind shown in FIG.
11 (a) is a view showing a state in which the drag blade is assembled to the integrated connection arm and shown at various angles, Figure 11 (b) is a state in which the drag blade is assembled to the assembled connection arm This is a view showing at various angles.
12 is a drag blade is assembled to the upper and lower parts of the assembled connecting arm, (a) is a view in which the drag blade is assembled in an upright form, (b) the drag blade forms a multi-stage unit of large blocks, each block is a neighbor (C) is a drawing in which drag blades form a multi-stage unit of small blocks and each block is assembled in units of 5 degrees with respect to neighboring blocks.
FIG. 13 is a view illustrating horizontally installing a low wind speed wind turbine generator according to the present invention, in which wind blowing from various directions acts on the wind turbine generator.
14 is a view illustrating a state in which the low wind speed the wind turbine generator is installed horizontally, vertically and inclined according to an embodiment of the present invention.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, a low wind speed wind turbine generator of the present invention will be described in detail with reference to the accompanying drawings. For the purposes of this specification, like reference numerals in the drawings denote like parts unless otherwise indicated.

1 is a view showing a low wind speed the wind turbine generator according to an embodiment of the present invention in a perspective view, Figure 2 is an overlap ratio of the drag blades, extension angle, 3 is a view for explaining the Y-axis spacing, Figure 3 is a view for explaining the wind capture in the low wind speed wind turbine generator according to the present invention, Figure 4a, Figure 4b is a low wind speed wind power generation according to an embodiment of the present invention A diagram for describing various embodiments of the wind capture in the apparatus.

The wind turbine generator according to the present invention includes a center shaft 100, a drag blade 200, a wind capture 300, a connection arm 400, and a power generation module 500.

1 and 2, the central shaft 100 is installed in a rotatable state to generate a rotational force for power generation of the wind turbine. In addition, since the rotational force due to the power generation or the rotational force due to the external wind directly acts, it is preferable to be firmly installed so as not to be shaken or jeopardized by the magnitude and magnitude of the external wind.

The drag blades 200 have a predetermined height in the shape of a semicircle and are formed with an assembly groove 210 for engaging with the connecting arm at the end of the upper surface, and in the embodiment consisting of a pair of drag blades 200a and 200b. Is formed in one rotational direction by forming an overlap region with respect to the center shaft 100. Referring to (a) and (b) of FIG. 2 in more detail, one end of the first drag blade 200a has a predetermined distance from one side of the central shaft 100 and the other end of the central shaft 100 ) Is disposed toward the other side, one end of the second drag blade 200b has a predetermined distance from the other side of the center shaft 100 and the other end is disposed toward one side of the center shaft 100. One end of the second drag blades 200a and 200b is disposed and fixed to have an overlap region in which the second drag blades 200a and 200b overlap with respect to the center shaft 100. At this time, if necessary, the first and second drag blades 200a and 200b and the third drag blades 200c may be formed in one rotation direction by forming an overlap region based on the center shaft 100.

Here, the overlap ratio of the overlap area of the first and second drag blades 200a and 200b is the case where the central axis of the central shaft is composed of a shaft, and the central axis is supported by the first and second drag blades 200a and 200b. Divided into cases without shafts. As shown in FIG. 2 (a), the overlap region in the case where the central axis consists of shafts is obtained by subtracting the shaft diameter e ′ of the central axis from the X-axis spacing e where the first and second drag blades 200a and 200b overlap. It is preferable that the value is formed by dividing the value of the first drag blade 200a by the diameter d and is within 5% to 34%, and the central axis is the first and second drag blades 200a and 200b as shown in FIG. The overlap region in the case of being configured without a shaft is formed by dividing the X-axis spacing e where the first and second drag blades 200a and 200b overlap by the diameter d of the first drag blade 200a. It is preferably made up within% to 34%.

That is, in FIG. 2 (a), the overlap ratio of the overlap area when the shaft diameter e ′ of the central axis is zero is the same as the overlap ratio of FIG. 2 (b), and the wind is the first drag blade 200a. It is preferable that the overlap ratio of the wind passing through the second drag blade 200b facing each other is equal to or less than 5% to 34%.

In addition, the first and second drag blades 200a and 200b extend at a predetermined angle from the ends. At this time, the extension angle θ is preferably extended to within −3 ° to 35 °.

In addition, the Y-axis spacing a of the first drag blade 200a and the second drag blade 200b is preferably formed at an interval of −5/110 to 1/5 of the diameter d of the first drag blade 200a. Do.

As shown in FIG. 3, the wind capture 300 is provided in the body of the drag blade 200 in the longitudinal direction, and has a concave shape having an airfoil shape to increase the rotation moment due to wind power. In addition, the wind capture 300 may be made of three types of A type 310, B type 320, and C type 330 according to the selection of the rule receiving the resistance of the air in the air foil. Here, the type A of the wind capture 310 is formed in a semi-circular shape having an air foil structure so as to generate lift on the inside and outside of the first and second drag blades, and the B type 320 is the first and second. The inner surface of the drag blade line is removed, and the C type 330 has a shape in which the outer surfaces of the first and second drag blade lines are removed.

In addition, as shown in Figure 4a, the wind capture 300 may be formed in plurality in the middle of a predetermined distance from one end of the drag blade 200. Here, the first and second drag blades (200A, 200B) from one end of the end sequentially divided into the capture 1, the wind capture 2, the wind capture 3, the wind capture 300, 1, 2, 3 is one type or It may also be provided in different types.

As shown in the figure, from the one end of the drag blade 200, the wind capture A, wind capture 2, wind capture 3 in the order of the wind capture A type 310 can be attached to the drag blade 200 line, drag blade 200 A type 310 is attached to one end of the wind capture 1) and the B type 320 can be sequentially attached in the order of the wind capture 2, 3, wind capture 1, wind capture 2, from one end of the drag blades The wind capture B type 320 may be attached in the order of the wind capture 3, A type 310 is attached to the wind capture 1, which is one end of the drag blade 200, C type (330) in the order of the wind capture 2, 3 ) May be attached.

In addition, any one or more of the three types of the wind capture 300 is attached to the drag blades 200 as shown in Figure 4b may be selectively used. As shown, the wind-capture A type 310 may be selected and attached to one end of the drag blade 200, and the wind-capture A type 310, B type 320, or one end of the drag blade 200 from one end. The C type 330 may be sequentially attached, and any one of the A type 310 to the C type 330 may be selectively attached to the inner and outer surfaces of the drag blade 200.

5 is the direction of the wind passing through the overlap region of the drag blades sequentially attached to the wind capture A, wind capture A type 330 to the wind capture 1, wind capture 2, wind capture 3 from one end of the drag blade 200 in FIG. It is a figure which shows operation | movement.

As the wind coming from the outside as shown in Figure 5 rides inside the first drag blades (200a) to generate the maximum starting torque and maneuvering force to the first drag blades (200a) to the maximum, and the second drag facing the semicircular overlap region The additional moment of rotation is generated while passing through the blade 200b, and lift force is generated through the wind capture 300 while the first and second drag blades 200a and 200b are rotated to maximize the peripheral speed ratio.

The drag blade configured as described above is coupled to the central shaft 100 through the connection arm 400.

The connection arm 400 is divided into an integrated connection arm 410 and an assembled connection arm 420a and 420b.

6 (a), (b) is a view for explaining the assembly of the integrated connection arm and the drag blade in the low wind speed wind turbine generator according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention FIG. 8 is a view for explaining the assembly of the assembled connection arm and the drag blade in the low wind speed wind turbine according to the present invention. FIG. 8 is a view for explaining a twist angle of the assembly groove formed in the assembly connection arm of FIG. As shown in FIG. 12 (c), the drag blades and the assembled connecting arms stacked in multiple stages of the small block unit are assembled at a 5-degree skew angle.

First, as shown in FIGS. 6A and 6B, the integrated connection arm 410 is formed in a disc shape, and a through hole 411 through which the central shaft 100 penetrates is formed at a central portion thereof. A fastening hole 412 to which the shaft holder 120 is fastened to an outer circumference of the 411 is formed. The upper surface of the bolt hole 413 is formed along the surface on which the drag blades 200 are coupled.

Here, the shaft holder 120 is a means for connecting the integral connection arm 410 and the center shaft 100, a pair of left and right holders made of a semicircle are matched with each other based on the center shaft 100 to bolt It is coupled to the central shaft 100 by being coupled, and is vertically bolted to the fastening hole 412 formed in the integral connection arm 410 to couple the integral connection arm 410 and the central shaft 100.

6 (a), (b) and 11 (a), the coupling of the integrated connection arm 410 and the drag blade 200 is performed by the integrated connection arm 410 and the drag blade 200. Is placed up and down, A bolt hole 413 formed on the upper surface of the integrated connection arm 410 and an assembly groove 210 formed on the upper and lower surfaces of the drag blade 200 are fastened with bolts to fix the drag blade 200 and the integrated connection arm 410. At this time, the drag blade 200 is installed to have an overlap area based on the center shaft 100 as described above.

In addition, the integrated connection arm 410 may assemble the first and second drag blades 200a and 200b as shown in FIG. 6 (a), and at least three drag blades 200a, as shown in FIG. 200b and 200c may also be assembled.

As shown in FIGS. 7 to 9, the assembled connecting arm includes a first connecting arm 420a and a second connecting arm 420b, and the first and second connecting arms 420a and 420b respectively have a center shaft. The shaft coupling portion 421 is bolted to the 100 and the support 422 is uniformly provided on the outer periphery of the shaft coupling portion 421, the shaft coupling portion 421 on the central shaft 100 Is fixed by bolting.

Here, the shaft coupling portion 421 is made of a semi-circular shape so as to facilitate the coupling with the central shaft 100, the semi-circular shaft coupling portion 421 provided on the first and second connection arms (420a, 420b), respectively. Cylindrical shape is achieved by joining in opposition. At this time, the shape of the central shaft 100 may be circular, elliptical, polygonal, the shape of the shaft coupling portion 421 coupled to the central shaft 100 may also be circular, ellipse, polygon.

In addition, the support 422 is configured in the assembled connection arm, and the cross section is formed in an air foil shape to generate lift by means of coupling the assembled connection arm, the drag blades 200a and 200b, and the center shaft 100. It is preferable.

In addition, the first and second connection arms 420a and 420b coupled to the support 422 are formed in one direction by forming an overlap region around the shaft coupling part 421 and the first and second connection arms ( 420a and 420b are provided with airfoil windcaps 300 concave toward the rotation direction. Here, it is preferable that the wind capture 300 formed on the first and second connection arms 420a and 420b has the same type as the wind capture 300 attached to the drag blade 200.

In addition, bolt holes 423 coupled to the assembly grooves 210 of the drag blades 200 are formed on the upper surfaces of the first and second connection arms 420a and 420b, and the drag blades 200 are assembled at a twisted angle. A plurality of bolt holes 423 having a twist at an angle of 1 ° may be formed. That is, the drag blades 200 and the first and second connection arms 420a and 420b may be assembled in an upright form without a twist angle, may be assembled to have a twist at an angle of 1 °, and are illustrated in FIG. 9. It may be assembled at a 5 ° twist angle as shown.

10 is a view showing the direction and action of the wind of the assembled connecting arm.

The assembled connecting arms 420a and 420b generate maximum starting torque and maneuvering force as the wind coming from the outside rides inside the first connecting arm 420a, and the first connecting arm 420a and the second connecting arm ( 420b passes through the overlap area where the center shaft 100 overlaps and passes through the second connection arm 420b to generate an additional moment of rotation, and the first and second connection arms 420a and 420b rotate. Lifting force is generated through the middle wind capture 300 to maximize the speed ratio.

On the other hand, the power generation module 500 is located on the extension line of the center shaft 100 receives the rotational driving force of the center shaft 100 to produce power.

In order to overcome the limitations of low wind speed wind power generation, the wind power generator of the present invention finds a geometrical parameter that becomes the rotational efficiency of the highest efficiency through the results of many simulations so that the optimal geometric configuration is defined. Was tested. Although a lot of manpower and time were required to produce a miniaturized model in order to obtain an optimal rotation moment through simulation by wind tunnel as an attempt of technical selection, for the invention of the technology of low wind speed wind turbine generator, After combining and manufacturing as shown in Table 1 (shrink blade)

TABLE 1

With 6.0m / sec Wind Tunnel as shown in Table 2 below

TABLE 2

Blade rotation RPM and output coefficient ( C _p ) for each No Load and Load at each generator's output stage under each condition of Geometric Parameter at 6.0m / sec wind speed. Experimental results were obtained.

The calculation of the output coefficient ( Cp , power coefficient)

[formula]

Calculated using.

Where P is power, p air density, V is wind speed, R is blade rotor radius, Cp Is the power coefficient ( Cp , power coefficient).

Table 3 below shows the overlap ratio of the overlap area of the first and second drag blades 200a and 200b of the drag blade based on the center shaft 100 at 0%, 5%, 10%, 13%, 16%, 22%, 25%, 28%, 32%, 34%, 40%, 50%, a table comparing the results obtained by experiment in units.

[Table 3]

Table 4 below shows the results obtained by experimenting with each type (number / type) of the wind capturing 300 formed in the middle of each predetermined distance from one end of the first and second drag blades at the highest efficiency (25% overlap) of Table 3. Is a table comparing each.

[Table 4]

Table 5 below shows the extension angle θ extending to the ends of the first and second drag blades 200a and 200b from -10 °, -3 °, 0 °, 3 °, 10 °, 20 °, Tables comparing the results obtained by experimenting in units of 30 °, 35 °, 40 °, and 50 °, respectively.

[Table 5]

Table 6 below shows the Y axis spacing (a) of the first drag blade (200a) and the second drag blade (200b) -0.05, 0.00, 0.05, 0.10, 0.20 of the diameter (d) of the first drag blade (200a) , 0.25, and 0.30 units. The results obtained from the experiments were compared.

 TABLE 6

Through the above experimental results, it was found that the output coefficient ( C _p ) increased by 44.1% from the overlap ratio of 25% in the overlap area without the overlap (overlap ratio 0), and by type of the wind capture 300 (number Type) 17.9% power factor ( C _p ) in the wind capture 300 consisting of three A-types of the division 1 in the middle of a certain distance from one end of each of the first and second drag blades (200a, 200b) in the experiment It can be seen that increases. In addition, the extension angle (θ) extending to the ends of the first and second drag blades (200a, 200b) was confirmed that the output coefficient ( C _p ) of 5.1% at 30 ° from the center point increases, the drag blade ( 200 is more efficient in that the Y-axis spacing a between the first drag blade 200a and the second drag blade 200b is formed at -5/110 to 1/5 intervals of the first drag blade diameter d. There was a characteristic. Experimental results of this reduced model will further increase the efficiency in low wind speed wind turbines.

As described above (number / type) of the overlap ratio of the overlap region and the wind capturing 300 formed in the middle of a predetermined distance from one end of each of the first and second drag blades 200a and 200b by geometrical parameters as described above. ), The extension angle θ extending to the ends of the first and second drag blades 200a and 200b, and the Y axis spacing a between the first drag blade 200a and the second drag blade 200b. By confirming the optimal data, by adopting a structure using the low wind speed wind power generator of the present invention, it is possible to perform highly efficient wind power generation even in a small wind regardless of the direction of the wind.

Low wind speed wind turbine generator configured as described above can be divided into various embodiments according to the overall form.

 Figure 11 (a) is an upright drag blade 200 is assembled to the integrated connection arm 410 and viewed from various angles, Figure 11 (b) is an upright drag on the assembled connection arms (420a, 420b) The blade 200 is assembled and viewed from various angles. At this time, as shown in (a) and (b) of FIG. 11, the drag blade 200 has an overlap region based on the central shaft 100 on the integrated connection arm 410 or the assembled connection arms 420a and 420b. This is assembled to make.

12 is a view in which the drag blade 200 is formed in an upright form in a state in which the drag blade 200 is assembled to the upper and lower portions of the connecting arm 400, and (b) the drag blade 200 is a large block. The multi-stage of the units, each block is a 60-degree unit with respect to the neighboring block, (c) the drag blades form a multi-stage of the small block unit, each block is a unit of 5 degrees with respect to the neighboring block. .

 As shown in FIG. 12A, the drag blade 200 may be formed in an upright form parallel to the center shaft 100. And, as shown in (b) of FIG. 12, the drag blade 200 forms a block unit that is divided at regular intervals in the longitudinal direction, but forms a large block unit that is equally divided about three lengths, and the large block unit The angle may be 60 ° to 180 ° with respect to the large block unit (a, b, c,). In addition, as shown in (c) of FIG. 12, the drag blade forms a multi-stage of small block units divided by predetermined intervals in the longitudinal direction, and the small block units are adjacent small block units (a, b, c, d, ...) It can be twisted at an angle within the range of 1 ° to 19 °.

11 and 12 (a), when the drag blade 200 is configured in an upright shape, the integrated connection arm of FIG. 11 (a) coupled with the central shaft 100 at the upper and lower portions of the drag blade 200. 410 or the assembled connection arms 420a and 420b of FIG. 12A are coupled. And, as shown in Figure 12 (b) when the drag blade 200 is composed of a large block of multi-stage unit blocks (420a, 420b) assembled on the upper and lower portions of each block of blocks (blocks a, b, c) 12 is coupled, and when the drag blade is composed of multiple stages of small block units as shown in (c) of FIG. 12, the assembled connecting arms 420a, 420b) are combined . That is, the integrated connection arm 410 or the assembled connection arms 420a and 420b are coupled to the upper portion of the drag blade 200, and the integrated connection arm 410 or the assembled connection arm is also attached to the lower portion of the drag blade 200. 420a and 420b are combined.

Here, (c) of FIG. 12 shows a plurality of drag blades having a shape where a support is removed from the assembled connecting arms 420a and 420b and the assembled connecting arms 420a and 420b at a small block angle, that is, between 1 ° and 1 °. It can be assembled by twisting at an angle within the 19 ° range and assembled into small blocks. At this time, the blade width of about 1.5 m or more is preferably configured as shown in Figure 9 without removing the support from the assembled connecting arms (420a, 420b) of the intermediate stage to maintain the blade firmly. In addition, as shown in FIG. 9, the plurality of assembled connection arms 420a and 420b may be assembled at a small block angle, that is, at a predetermined angle within a range of 1 ° to 19 ° without a drag blade to be assembled in small blocks.

FIG. 13 is a view illustrating horizontally installing a low wind speed wind turbine generator according to the present invention, in which wind blowing from various directions acts on the wind turbine generator. FIG. 14 is a view illustrating a low wind speed generator according to an embodiment of the present invention. Figure is a view showing a state in which the wind turbine is installed horizontally, vertically and inclined.

The low wind speed wind turbine installed horizontally as shown in FIG. 13 enables high efficiency wind power generation even in small winds regardless of the direction of the wind. It is quick and easy and can reduce the cost of the expansion part.

In addition, as shown in FIG. 14, the blade module including the drag blade 200 and the wind capturing 300 may be stacked in one or a plurality of blade modules. The blade modules stacked in one or a plurality of vertical, horizontal, and angled angles may be used. It can be suitably installed according to the installation environment such as inclined type or other angles, and it can be applied to any place to generate electricity by wind.

As described above, the low wind speed wind turbine generator is a geometrical parameter, and the overlap ratio of the overlap region and the extension angle θ extending to the ends of the first and second drag blades and the Y-axis spacing of the first and second drag blades. By adopting the structure of the drag blade having (a) and the airfoil type wind capturing provided in the first and second drag blades, the wind power output coefficient is not only accelerated by using the drag and lift of the wind at the same time. Wind power can be improved even with small winds, regardless of direction or specific location or location.

In addition, drag blades equipped with airfoil-type windcaptures are easily manufactured by extrusion injection of aluminum or plastic, and can be variously manufactured by FRP or post-processing, and injection by mold during mass production. This is preferred. In particular, intermediate parts made of iron or aluminum such as shaft holders can be produced at a cost competitive product by precise processing using a laser.

In addition, it is possible to easily form drag blades of various sizes by stacking as many as necessary, thereby improving blade installation efficiency and reducing work costs, and at a low cost regardless of location or location. It is economical and eco-friendly because it is possible to install power generation equipment.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. That is, a person of ordinary skill in the art to which the present invention pertains can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications are possible. Equivalents should be considered to be within the scope of the present invention.

100: center shaft 120: shaft holder
121: Combination hole 200: Drag blade
200a: first drag blade 200b: second drag blade
200c: third drag blade 210: assembly groove
300: Wind Capture 310: Type A
320: B type 330: C type
400: connecting arm 410: integral connecting arm
411: through hole 412: fastening hole
413: bolt hole 420a, 420b assembly arm
421: shaft coupling portion 422: support
423: bolt hole 500: power generation module

Claims (18)

In the wind turbine generating power by the wind,
The wind turbine generator is supported in a rotatable state to generate a rotational shaft;
A connection arm coupled to the upper and lower ends of the center shaft and used as a coupling means of the drag blade;
A plurality of drag blades coupled to the connection arm and fixed in one rotational direction by forming overlap regions of a predetermined ratio with respect to the center shaft to increase the rotation moment;
An air foil-shaped wind cap provided in the body of the drag blade in a longitudinal direction and concave toward the drag blade rotation direction to increase a rotation moment caused by wind power; And
And a power generation module positioned on an extension line of the center shaft and generating power by receiving a rotation moment of the center shaft. The method of claim 1,
The connecting arm has a disc shape, a through hole through which the center shaft penetrates is formed in the center of the disc, and a fastening hole through which the shaft holder fixed to the center shaft is fastened is formed on the outer side of the disc. Low wind speed wind turbine generator, characterized in that made in one piece is formed with a bolt hole along the surface coupled to the drag blade. The method of claim 2,
Coupling of the integrated connection arm and the central shaft is a pair of shaft holders having a coupling hole formed on the upper surface is fixed to the central shaft, the coupling hole formed on the upper surface of the shaft holder and the fastening hole formed in the integrated connection arm by bolts Low wind speed wind turbine characterized in that coupled to. The method of claim 1,
The connecting arm has a shaft coupling portion coupled to the central shaft, the support is evenly connected to the outer surface of the shaft coupling portion, coupled to the drag blade and forming an overlap region with respect to the central shaft in one direction of rotation Low wind speed wind turbine generator characterized in that the assembly is composed of the first, the second connection arm is provided with the air-foil wind capture concave disposed in the rotation direction. The method of claim 4, wherein
The support is low wind speed the wind turbine generator, characterized in that the cross section is made of air foil shape. The method of claim 4, wherein
The connection arm is a low wind speed the wind turbine generator, characterized in that a plurality of bolt holes are formed at a 1 ° angle on the upper surface of the first and second connection arms. The method of claim 6
The connecting arm is a low wind speed wind turbine generator, characterized in that the plurality of first and second connecting arms are twisted at a predetermined angle within the range of 1 ° to 19 ° assembled in a twisted form. The method of claim 1,
The overlap ratio of the overlap area of the drag blade is the semi-circle diameter (d) when the central axis, which is the central shaft, is composed of a shaft, and subtracts the shaft diameter (e ') of the central axis from the overlapping X-axis spacing (e) between the semicircles. Low wind speed wind turbine generator, characterized in that divided and formed, if the central shaft is a shaft that is supported by the drag blades configured without a shaft, the overlapping X-axis spacing (e) between the semicircles is formed by dividing the semicircle diameter (d). The method of claim 8,
Low wind speed wind turbine generator, characterized in that the overlap ratio of the overlap area of the drag blade is made within 5% to 34%. The method of claim 1,
The drag blade has an outward side end portion extending from the semicircle, and the extending angle (θ) extends from -3 ° to 35 ° from the center point of the semicircle. The method of claim 1,
The drag blade is a low wind speed wind turbine generator, characterized in that the Y-axis spacing (a) between the semicircles are formed at intervals of -5/110 to 1/5 of the drag blade semicircle diameter (d). delete delete delete The method of claim 1,
The drag blade is a low wind speed the wind turbine generator, characterized in that formed in an upright form parallel to the longitudinal direction of the central shaft. The method of claim 1,
The drag blade forms a multi-stage of large blocks in the longitudinal direction, wherein the large block unit is formed in a form twisted at an angle of 60 ° to 180 ° with respect to the neighboring large block unit. The method of claim 1,
The drag blade forms a multi-stage of small block units in a longitudinal direction, and the small block unit is twisted at a predetermined angle within a range of 1 ° to 19 ° with respect to a neighboring small block unit, and is formed in a twisted shape. Power generation device. The method of claim 1,
The low wind speed the wind turbine generator is low wind speed wind turbine characterized in that it is possible to be installed at any one of the vertical and horizontal angles, including the vertical and horizontal.

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