KR20190098500A - Multi type wind turbine - Google Patents

Abstract

The present invention provides a wind turbine capable of avoiding the interference of upper and lower generation units. According to one aspect of the present invention, the multiple wind turbine comprises: a tower; a plurality of lower support arms fixed to the tower and extending downward from the tower; a plurality of upper support arms fixed to the tower and extending upward from the tower; a lower generation unit fixed to the lower support arms and having a lower rotor and a generator; and an upper generation unit positioned above the lower power generation unit, fixed to the upper support arms, and having an upper rotor and a generator. The upper rotor and the lower rotor are spaced apart from each other in a front and rear direction.

Description

Multi-type Wind Generators {MULTI TYPE WIND TURBINE}

The present invention relates to a multi-type wind generator, and more particularly to a multi-type wind generator having a plurality of unit power generation units in one tower.

Wind power generation refers to a power generation method in which wind energy is converted into mechanical energy (rotary power) using a windmill, and the mechanical energy is converted into electrical energy by driving a generator to obtain electric power.

Wind power generation is not only the most economical among the renewable energy sources developed so far, but also has been actively invested not only in Europe but also in the Americas and Asia due to the advantages of being able to generate power using the wind, which is an unlimited clean energy source for the wind. to be.

Wind generators for such wind power generation may be divided into a vertical axis wind generator and a horizontal axis wind generator according to the direction of the rotation axis. Until now, the horizontal axis wind generators are more efficient and stable than the vertical axis, so most of the commercial wind farms are applied with the horizontal axis wind generators.

Conventional horizontal axis wind turbines need to be equipped with a generator having a capacity corresponding to the size of the blade or to increase the size of the blade to obtain a lot of power. However, as the blade becomes bigger or the capacity of the generator increases, the weight of the blade and generator increases, so that the tower and the structure supporting the heavy blade and the generator must grow in size, and the weight of the power generation facility including the blade and the generator becomes heavy. Parts, such as bearings for supporting the bearings, must be increased, and a special device is to be installed for the yaw movement which turns the direction of the rotor blade according to the wind direction.

As a result, installation and maintenance costs increase exponentially, and this technical difficulty and increase in cost have a problem that causes a huge obstacle to widespread deployment of wind power generators.

Recently, a multi-type wind generator is known which arranges a plurality of unit power generation units along a circumferential direction around one tower. The multi-type wind generator is provided with one main nacelle in one tower, radially couples a plurality of support arms to the main nacelle, and installs a unit power generation unit in each support arm. The unit power generation unit includes a sub nacelle including a generator, a rotor rotatably coupled to the sub nacelle, and a small blade coupled to the rotor and rotating together.

In the multi-type wind generator, unit power generation units are spaced up and down, and a lower power generation unit is disposed below the upper power generation unit to supply goods to the upper power generation unit or to escape from the upper power generation unit with the blades of the lower power generation unit. Interfering problems arise.

Republic of Korea Patent No. 10-1388494 (2014.04.23)

The present invention provides a wind generator that can avoid the interference of the upper power generation unit and the lower power generation unit.

Multi-type wind power generator according to an aspect of the present invention is a tower, a plurality of lower support arms fixed to the tower leading to the bottom from the tower, a plurality of upper support arms fixed to the tower and connected to the top from the tower, the A lower power generation unit fixed to the lower support arm and having a lower rotor and a generator, and positioned higher than the lower power generation unit, the upper power generation unit fixed to the upper support arm and having an upper rotor and a generator, The upper rotor and the lower rotor are spaced apart in the front and rear direction.

In addition, the front end of the upper rotor may be disposed in the rear at intervals from the rear end of the lower rotor.

In addition, the rear end of the upper rotor may be disposed in the front at intervals from the front end of the lower rotor.

The tower further includes a main nacelle rotatably installed, the main nacelle having a longitudinal direction extending in a direction crossing the height direction of the tower, and the first nacelle having the upper support arm fixed thereto. A second fixing part to which the government and the lower support arm are fixed may be formed, and the first fixing part and the second fixing part may be spaced apart in the longitudinal direction of the main nacelle.

The first fixing part and the second fixing part may be positioned on different sides with respect to the first virtual plane passing through the center of the tower and perpendicular to the longitudinal direction of the main nacelle.

In addition, the tower further includes a main nacelle rotatably installed, wherein the main nacelle has a longitudinal direction and a lateral direction extending in a direction crossing the height direction of the tower, wherein the upper support arm and the lower support arm The tower may be inclined at different angles in the lateral direction.

In addition, the tower further includes a main nacelle rotatably installed, wherein the main nacelle has a longitudinal direction and a lateral direction extending in a direction crossing the height direction of the tower, wherein the upper support arm and the lower support arm The tower may be inclined at different angles in the longitudinal direction.

In addition, the lower rotor and the upper rotor may be spaced apart from each other at a distance from the center of the tower in the lateral direction of the tower.

In addition, the lower rotor may be disposed farther from the center of the tower than the upper rotor.

In addition, the upper rotor may be disposed farther from the center of the tower than the lower rotor.

The upper rotor may include an upper sub nacelle and an upper blade rotatably installed on the upper sub nacelle, and the lower rotor includes a lower sub nacelle and a lower blade rotatably installed on the lower sub nacelle, and the upper The blade may be installed at the front end of the upper sub nacelle, and the lower blade may be installed at the rear end of the lower sub nacelle.

The upper rotor may include an upper sub nacelle and an upper blade rotatably installed on the upper sub nacelle, and the lower rotor includes a lower sub nacelle and a lower blade rotatably installed on the lower sub nacelle, and the upper The blade may be installed at the rear end of the upper sub nacelle, and the lower blade may be installed at the tip of the lower sub nacelle.

In addition, the upper support arm and the lower support arm may be formed to have different lengths.

Multi-type wind power generator according to another aspect of the present invention is a tower, a plurality of lower support arms fixed to the tower leading to the bottom from the tower, a plurality of upper support arms fixed to the tower and connected to the top from the tower, A lower power generation unit fixed to the lower support arm, the lower power generation unit having a lower rotor and a generator, and positioned above the lower power generation unit, the upper power generation unit fixed to the upper support arm and having an upper rotor and a generator; The lower rotor and the upper rotor are spaced apart from each other by a distance from the center of the tower in the lateral direction of the tower.

Multi-type wind power generator according to another aspect of the present invention, a tower, a plurality of lower support arms fixed to the tower from the top to the bottom, fixed to the tower a plurality of upper support arms extending from the tower to the top A lower rotor unit fixed to the lower support arm and rotatably installed on the lower sub nacelle and the lower sub nacelle, a lower power generation unit installed inside the lower sub nacelle and connected to the lower rotor, and the lower power generation unit An upper power generation having an upper rotor located inside the upper support arm and fixedly installed on the upper support arm and rotatably installed on the upper sub nacelle and the upper sub nacelle and the generator connected to the lower rotor. A unit, said lower rotor and said upper furnace Of which one is provided at a front of the upper or the lower sub-sub nacelle nacelle, while the other is installed on the rear portion of the upper sub nacelle or the lower sub nacelle.

As described above, according to an aspect of the present invention, the center of the upper rotor and the center of the lower rotor may be spaced apart in the front-back direction to avoid the interference of the upper power generation unit and the lower power generation unit.

In addition, since the upper power generation unit and the lower power generation unit are located at different distances laterally from the center of the tower, interference can be avoided.

In addition, one of the upper rotor and the lower rotor is installed in front of the sub nacelle, the other is installed in the rear of the sub nacelle can avoid the interference by the blade.

1 is a perspective view showing a multi-type wind power generator according to a first embodiment of the present invention.
FIG. 2 is a view illustrating the interior of the unit power generation unit of FIG. 1.
3 is a view showing a rotor and a main shaft according to the first embodiment of the present invention.
Figure 4 is a side view showing a multi-type wind power generator according to a first embodiment of the present invention.
5 is a front view showing a multi-type wind power generator according to a first embodiment of the present invention.
6 is a side view showing a multi-type wind power generator according to a second embodiment of the present invention.
7 is a front view showing a multi-type wind power generator according to a second embodiment of the present invention.
8 is a side view showing a multi-type wind power generator according to a third embodiment of the present invention.
9 is a side view showing a multi-type wind power generator according to a fourth embodiment of the present invention.
10 is a side view showing a multi-type wind power generator according to a fifth embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present invention, the terms 'comprise' or 'have' are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it is noted that the same components in the accompanying drawings are represented by the same reference numerals as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted. For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated.

Hereinafter, a multi-type wind power generator according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 is a perspective view showing a multi-type wind power generator according to a first embodiment of the present invention, Figure 2 is a view showing the interior of the unit power generation unit of Figure 1, Figure 3 according to a first embodiment of the present invention The figure shows a rotor and a main shaft.

1 and 2, the multi-type wind power generator 10 according to the first embodiment includes a tower 100, a main nacelle 300, an upper support arm 510, a lower support arm 520, and an upper portion. A power generation unit 700, and a lower power generation unit 600. In the multi-type wind generator 10 according to the present embodiment, a plurality of upper power generation units 700 and lower power generation units 600 are disposed, and the plurality of upper power generation units 700 is mainly connected through the upper support arms 510. It is fixedly coupled to the nacelle 300, and the plurality of lower power generation units 600 may be fixedly coupled to the main nacelle 300 through the lower support arm 520.

The tower 100 is installed at a predetermined height from the ground, and may support the main nacelle 300, the plurality of upper power generation units 700, and the lower power generation unit 600. The tower 100 may have a tubular shape in which the diameter increases from the top to the bottom. In this case, the tower 100 may be formed in a multi-stage form in which a plurality of tubular members are stacked. On the other hand, the tower 100 may be installed in the staircase, conveyor or elevator for transporting the worker or work tool for maintenance of the unit power generation unit 700.

Main nacelle (300) is located on top of the tower 100 may be rotatably coupled to the tower (100). An upper support arm 510 and a lower support arm 520 may be radially coupled to the main nacelle 300. However, the present invention is not limited thereto, and the upper support arm 510 and the lower support arm 520 may be formed to extend in a horizontal or slightly inclined direction with respect to the ground.

The main nacelle 300 may be formed in a shape similar to that of a conventional nacelle only, and may not include a gear box or a generator. The main nacelle 300 is formed to extend in the front-rear direction and has a longitudinal direction (x-axis direction) and a lateral direction (y-axis direction). However, the shape of the main nacelle 300 is not necessarily limited thereto, and may be formed in a cylindrical shape. The main nacelle 300 is rotatably disposed with respect to the tower 100 by the yawing system, and the upper power generation unit 700 and the lower power generation unit 600 also rotate by the rotation of the main nacelle 300.

The upper support arm 510 is a member connecting the main nacelle 300 and the upper power generation unit 700. The upper support arm 510 may have a tubular shape having a smaller diameter or a uniform diameter as it moves away from the main nacelle 300. In this case, the upper support arm 510 may be provided with a staircase or a conveyor for maintenance of the upper power generation unit 700.

The lower support arm 520 also connects the main nacelle 300 and the lower power generation unit 600, and a staircase or a conveyor may be installed therein for maintenance of the lower power generation unit 600.

Meanwhile, a plurality of upper support arms 510 and lower support arms 520 are coupled to the main nacelle 300. When the main nacelle 300 is viewed from the front, the tower 100 of the tower 100 is referred to. The same number of upper support arms 510 and lower support arms 520 are disposed on the left and right sides. For example, as shown in FIG. 1, one upper support arm 510 and one lower support arm 520 are disposed on the left side of the tower 100, and one upper portion is respectively disposed on the right side of the tower 100. Support arm 510 and lower support arm 520 may be disposed.

The upper power generation unit 700 generates electricity by using wind. The upper rotor 710, the upper sub nacelle 730, the main shaft 740, the gearbox 750, and the brake 760. ) And a generator 770.

The upper rotor 710 is rotatably installed in front of the upper sub nacelle 730, and the rotational force generated by the upper rotor 710 is transmitted to the speed increaser 750 through the main shaft 740. The upper rotor 710 is composed of a hub 713 and a plurality of upper blades 711, the hub 713 is coupled to one end of the main shaft 740 is rotatably installed on the front of the sub nacelle 730. . The plurality of upper blades 711 are coupled to the outer circumferential surface of the hub 713 at predetermined intervals along the circumferential direction.

As illustrated in FIG. 3, the inclination angle CA1 formed between the rotational central axis CX1 of the hub 713 and the central axis SX1 of the main shaft 740 may be 0 degrees to 2 degrees. Conventional wind generators have a cone angle of 5 degrees or more to prevent the tower and the blade from colliding when the blade is deformed by the wind. However, since the multi-type wind generator 10 does not collide with the tower 100 even when the upper blade 711 is deformed by the wind, the central axis of rotation of the hub 713 may be disposed in parallel with the main shaft 740. It may be formed to have a fine cone angle (CA1) of less than 2 degrees, thereby improving the power generation efficiency.

Hub 713 may be conical, protruding forward convex to reduce wind resistance. The upper blade 711 rotates about the central axis of the hub 713 by the wind. The upper blade 711 has a streamlined cross section in the width direction, and a space portion may be formed therein.

As shown in FIG. 2, the upper sub nacelle 730 is a housing that accommodates the speed increaser 750, the generator 770, and the like, and may be formed in a hexahedral shape. However, the shape of the upper sub nacelle 730 is not necessarily limited thereto, and may be formed in a cylindrical shape or the like.

The main shaft 740 transmits the rotational force of the rotor 710 to the speed increaser 750. The main shaft 740 that rotates at high speed is rotatably supported by a main bearing (not shown).

The increaser 750 is a device that converts the rotational speed of the main shaft 740 rotated by the upper blade 711 to the rotational speed suitable for power generation using a gear, and includes a plurality of gears inside the increaser 750. An increase gear unit (not shown) is provided. On the other hand, for lubrication and cooling of a plurality of gears in the speed increase gear part, the speed increaser oil (not shown) may be provided in the speed increaser 750.

The brake 760 may be disposed at a position adjacent to the speed increaser 750 to control the rotational force of the main shaft 740. In this case, the brake 760 may be mainly used a disk method.

Generator 770 is a device for producing electricity using the input rotation energy, there is provided a rotor (not shown) and a stator (not shown) connected to the rotating shaft therein. The rotor rotates around the stator at high speed to generate electricity.

Meanwhile, the lower power generation unit 600 also includes a lower rotor 610, a lower sub nacelle 630, a main shaft, a speed increaser, a brake, and a generator. The lower rotor 610 includes a hub 613 installed in front of the lower sub nacelle 630, and a plurality of lower blades 611 coupled to the hub 613. Since the lower power generation unit 600 is made of the same structure as the upper power generation unit 700, redundant description is omitted.

4 is a side view of the multi-type wind power generator according to the first embodiment of the present invention, Figure 5 is a front view showing a multi-type wind power generator according to the first embodiment of the present invention.

Referring to FIGS. 4 and 5, the upper rotor 710 and the lower rotor 610 are spaced apart in the front-rear direction, and the upper rotor 710 may be located further rearward than the lower rotor 610. More specifically, the front end of the upper rotor 710 may be located further behind the rear end of the lower rotor 610. The upper rotor 710 and the lower rotor 610 may be spaced apart by a predetermined distance, and may be spaced apart so that the lower blade 611 is not positioned below the upper nacelle 730.

Here, the front or the rear is referred to as the wind flow direction (arrow of FIG. 4), and the upstream side is called the front side and the downstream side is called the rear side. In FIG. 1, the direction in which the front surfaces of the blades and the main nacelle 300 face (x-axis direction) may be forward.

To this end, the first fixing part F11 to which the upper support arm 510 is fixed to the main nacelle 300 and the second fixing part F12 to which the lower support arm 520 is fixed to the main nacelle 300 are the main nacelle. It is spaced apart in the longitudinal direction (x-axis direction) of 300. Herein, the length direction of the main nacelle 300 is a direction crossing the height direction (z-axis direction) of the tower 100 and may be a direction of the central axis MX1 of the main nacelle 300. The first fixing part F11 may be located further rearward than the second fixing part F12.

The first fixing part F11 and the second fixing part F12 pass through the center of the tower 100 and refer to the first virtual plane S1 perpendicular to the longitudinal direction (x-axis direction) of the main nacelle 300. Can be located on different sides. That is, the first fixing part F11 is located at the rear of the first virtual plane S1, and the second fixing part F12 is located at the front of the first virtual plane S1, so that the first fixing part F11 is positioned at the front of the first virtual plane S1. The second fixing part F12 may be spaced apart from each other with the first virtual plane S1 interposed therebetween.

In addition, the upper support arm 510 and the lower support arm 520 may be formed to be inclined with respect to the longitudinal direction of the main nacelle 300 so as to protrude forward, the upper support arm 510 and the lower support arm 520 The main nacelle 300 may be inclined at different angles with respect to the longitudinal direction.

The upper support arm 510 may be formed to be inclined at a first inclination angle A11 so that the upper support arm 510 may be placed upright, and the lower support arm 520 may protrude further forward than the upper support arm 510. It may be formed to be inclined to (A12). In this case, the second inclination angle A12 may be larger than the first inclination angle A11, and the second inclination angle A12 may be made 1.05 times or twice the first inclination angle A11.

As such, when the lower rotor 610 is located further forward than the upper rotor 710, the lower blade 611 does not exist directly below the upper rotor 710 so that the worker may escape from the upper sub nacelle 730. The damage caused by the lower blade 611 can be prevented.

As shown in FIG. 5, the upper support arm 510 and the lower support arm 520 may be formed to be inclined with respect to the lateral direction (y-axis direction) of the main nacelle 300. The lower support arm 520 may be inclined at different angles with respect to the lateral direction (y-axis direction) of the main nacelle 300.

The upper support arm 510 may be formed to be inclined at a third inclination angle A13 so that the upper support arm 510 may be placed upright, and the lower support arm 520 may protrude further laterally than the upper support arm 510. It may be inclined at an inclination angle A14. Here, the third inclination angle A13 may be larger than the fourth inclination angle A14, and the third inclination angle A13 may be 1.05 to 2 times the fourth inclination angle A14.

Meanwhile, the length of the upper support arm 510 may be shorter than the length of the lower support arm 520. Accordingly, the upper power generation unit 700 and the lower power generation unit 600 may be spaced apart from each other by the distance from the center of the tower 100 in the lateral direction. The length of the upper support arm 510 may be 0.5 to 0.98 times the length of the lower support arm 520.

The upper power generation unit 700 may be located closer to the center of the tower than the lower power generation unit 600. The upper power generation unit 700 is spaced apart from the central axis TX1 of the tower 100 by a first distance D11, and the lower power generation unit 600 is a second distance from the central axis TX1 of the tower 100. The second distance D12 has a larger value than the first distance D11. The second distance D12 may be 1.05 times to 2.5 times the first distance D11.

As described above, according to the first exemplary embodiment, the upper power generation unit 700 is disposed in the lower power generation unit 600 in the front-rear direction and the lateral direction so that the lower blade 611 is directly below the upper power generation unit 700. It will not be located. Accordingly, the escape of the worker in the upper power generation unit 700 and the supply of goods to the upper power generation unit can be made easily.

Hereinafter, a multi-type wind power generator according to a second embodiment of the present invention will be described.

6 is a side view showing a multi-type wind generator according to a second embodiment of the present invention, Figure 7 is a front view showing a multi-type wind generator according to a second embodiment of the present invention.

6 and 7, the multi-type wind generator 20 according to the second embodiment includes a tower 100, a main nacelle 300, an upper support arm 1510, and a lower support arm 1520. , An upper power generation unit 1700, and a lower power generation unit 1600. The multi-type wind generator 20 according to the second embodiment of the present invention except for the position of the upper power generation unit 1700 and the lower power generation unit 1600 and the configuration of the upper support arm 1510 and the lower support arm 1520 Since the same structure as that of the multi-type wind power generator according to the first embodiment is repeated, a duplicate description of the same configuration is omitted.

The upper power generation unit 1700 includes an upper sub nacelle 1730 fixed to the upper support arm 1510 and an upper rotor 1710 rotatably coupled to the upper sub nacelle 1730. The upper rotor 1710 also includes a hub 1713 and a plurality of upper blades 1711 coupled to the hub 1713.

The lower power generation unit 1600 includes a lower sub nacelle 1630 fixed to the lower support arm 1520 and a lower rotor 1610 rotatably coupled to the lower sub nacelle 1630. The lower rotor 1610 also includes a hub 1613 and a plurality of lower blades 1611 coupled to the hub 1613.

The upper rotor 1710 and the lower rotor 1610 are spaced apart in the front-rear direction, and the upper rotor 1710 may be located further forward than the lower rotor 1610. More specifically, the rear end of the upper rotor 1710 may be located in front of the front end of the lower rotor 1610. The upper rotor 1710 and the lower rotor 1610 may be spaced apart by a predetermined distance, and may be spaced apart so that the lower blade 1611 is not positioned below the upper nacelle 1730.

To this end, the first fixing part F21 in which the upper support arm 1510 is fixed to the main nacelle 300 and the second fixing part F22 in which the lower support arm 1520 is fixed to the main nacelle 300 are the main nacelle. It is spaced apart in the longitudinal direction (x-axis direction) of 300. Herein, the length direction of the main nacelle 300 is a direction intersecting with the height direction (z-axis direction) of the tower 100, and may be a direction of the central axis MX2 of the main nacelle 300. The first fixing part F21 may be located further rearward than the second fixing part F22.

The first fixing part F21 and the second fixing part F22 may be positioned on different sides with respect to the first virtual plane S2 that passes through the center of the tower and is perpendicular to the longitudinal direction of the main nacelle 300. have. That is, the first fixing part F21 is located in front of the first virtual plane S2, and the second fixing part F22 is located at the rear of the first virtual plane S2, so that the first fixing part F21 is positioned at the rear of the first virtual plane S2. The second fixing part F22 may be spaced apart from each other with the first virtual plane S2 interposed therebetween.

In addition, the upper support arm 1510 and the lower support arm 1520 may be formed to be inclined with respect to the longitudinal direction of the main nacelle 300 so as to protrude forward, the upper support arm 1510 and the lower support arm 1520 are The main nacelle 300 may be inclined at different angles with respect to the longitudinal direction.

The upper support arm 1510 may be formed to be inclined at a first inclination angle A21 so as to protrude forward, and the lower support arm 1520 may be formed to be erected above the upper support arm 1510. It may be formed to be inclined to. The first inclination angle A21 may be larger than the second inclination angle A22, and the first inclination angle A21 may be 1.05 to 2 times the second inclination angle A21.

As such, when the lower rotor 1610 is located further rearward than the upper rotor 1710, the lower blade 1611 does not exist directly below the upper rotor 1710 so that the worker may escape from the upper sub nacelle 1730. The damage caused by the lower blade 1611 can be prevented.

The upper support arm 1510 and the lower support arm 1520 may be inclined with respect to the lateral direction (y-axis direction) of the main nacelle 300. The upper support arm 1510 and the lower support arm 1520 are the main The nacelle 300 may be formed to be inclined at different angles with respect to the lateral direction.

The upper support arm 1510 may be formed to be inclined at a third inclination angle A23 so as to protrude further in the lateral direction, and the lower support arm 1520 is formed to be inclined at a fourth inclination angle A24 so as to be placed upright. Can be. In this case, the fourth inclination angle A24 may be larger than the third inclination angle A23, and the fourth inclination angle A24 may be made 1.05 times or twice the third inclination angle A23.

Meanwhile, the length of the upper support arm 1510 may be longer than the length of the lower support arm 1520. Accordingly, the upper power generation unit 1700 and the lower power generation unit 1600 may be spaced apart from each other by a distance from the center of the tower 100 laterally. The length of the lower support arm 1520 may be 0.5 to 0.98 times the length of the upper support arm 1510.

The upper power generation unit 1700 may be located farther from the center of the tower than the lower power generation unit 1600. The upper power generation unit 1700 is spaced apart from the central axis TX2 of the tower 100 by a first distance D21, and the lower power generation unit 1600 is a second distance from the central axis TX2 of the tower 100. Spaced apart from (D22), the first distance (D21) has a larger value than the second distance (D22). The first distance D21 may be 1.05 times to 2.5 times the second distance D22.

As described above, according to the second exemplary embodiment, the upper power generation unit 1700 is disposed in the lower power generation unit 1600 in the front-rear direction and the lateral direction so that the lower blade 1611 is directly below the upper power generation unit 1700. It will not be located. This improves access to the upper power generation unit 1700.

Hereinafter, the multi-type wind power generator according to the third embodiment of the present invention will be described. 8 is a side view showing a multi-type wind power generator according to a third embodiment of the present invention.

Referring to FIG. 8, the multi-type wind generator 30 according to the third embodiment includes a tower 100, a main nacelle 300, an upper support arm 2510, a lower support arm 2520, and an upper power generation. Unit 2700, and lower power generation unit 2600. The multi-type wind generator 30 according to the third embodiment of the present invention has the above-described first except for the upper power generation unit 2700, the lower power generation unit 2600, the upper support arm 2510, and the lower support arm 2520. Since it is made of the same structure as the multi-type wind generator according to the embodiment, redundant description of the same configuration is omitted.

The upper power generation unit 2700 includes an upper sub nacelle 2730 fixed to the upper support arm 2510 and an upper rotor 2710 rotatably coupled to the upper sub nacelle 2730. The upper rotor 2710 also includes a hub 2713 and a plurality of upper blades 2711 coupled to the hub 2713.

The lower power generation unit 2600 includes a lower sub nacelle 2630 fixed to the lower support arm 2520 and a lower rotor 2610 rotatably coupled to the lower sub nacelle 2630. The lower rotor 2610 also includes a hub 2613 and a plurality of lower blades 2611 coupled to the hub 2613.

Here, the upper rotor 2710 is disposed behind the upper sub nacelle 2730, and the lower rotor 2610 is disposed behind the lower sub nacelle 2630. Accordingly, the upper power generation unit 2700 and the lower power generation unit 2600 may be of a downwind type.

The upper rotor 2710 and the lower rotor 2610 are spaced apart in the front-rear direction, and the upper rotor 2710 may be located further rearward than the lower rotor 2610. The upper support arm 2510 may be fixed to the main nacelle 300 more rearward in the direction of the axis MX3 of the main nacelle 300 than the lower support arm 2520.

In addition, the upper support arm 2510 may be formed to be inclined rearward, and the lower support arm 2520 may be formed to be inclined forward. Accordingly, the upper support arm 2510 and the lower support arm 2520 may be formed to be inclined at different angles with respect to the longitudinal direction of the main nacelle 300.

As described above, according to the third embodiment, since the upper support arm 2510 and the lower support arm 2520 are formed to be inclined in different directions, the distance between the upper power generation unit 2700 and the lower power generation unit 2600 is further increased. You can.

Hereinafter, a multi-type wind power generator according to a fourth embodiment of the present invention will be described. 9 is a side view showing a multi-type wind power generator according to a fourth embodiment of the present invention.

Referring to FIG. 9, the multi-type wind power generator 40 according to the fourth embodiment includes a tower 100, a main nacelle 300, an upper support arm 3510, a lower support arm 3520, and an upper power generation. Unit 3700, and lower power generation unit 3600. Since the multi-type wind generator 40 according to the fourth embodiment has the same structure as the multi-type wind generator according to the first embodiment except for the upper power generation unit 3700 and the lower power generation unit 3600, the same configuration Duplicate description of the description will be omitted.

The upper power generation unit 3700 includes an upper sub nacelle 3730 fixed to the upper support arm 3510 and an upper rotor 3710 rotatably coupled to the upper sub nacelle 3730. The upper rotor 3710 also includes a hub 3713 and a plurality of upper blades 3711 coupled to the hub 3713.

The lower power generation unit 3600 includes a lower sub nacelle 3630 fixed to the lower support arm 3520 and a lower rotor 3610 rotatably coupled to the lower sub nacelle 3630. The lower rotor 3610 also includes a hub 3613 and a plurality of lower blades 3611 coupled to the hub 3613.

The upper rotor 3710 and the lower rotor 3610 are spaced apart in the front-rear direction, and the upper rotor 3710 may be located further rearward than the lower rotor 3610. The upper support arm 3510 may be fixedly installed to the main nacelle 300 at a further rear portion in the direction of the axis MX4 of the main nacelle 300 than the lower support arm 3520.

Meanwhile, the upper rotor 3710 is disposed behind the upper sub nacelle 3730, and the lower rotor 3610 is disposed in front of the lower sub nacelle 3630. Accordingly, the upper power generation unit 3700 may be of a downwind type, and the lower power generation unit 3600 may be of an upwind type.

When the rotors of the upper power generation unit 3700 and the lower power generation unit 3600 are arranged in different directions as in the fourth embodiment, the distance between the upper rotor 3710 and the lower rotor 3610 may be further increased.

Hereinafter, a multi-type wind power generator according to a fifth embodiment of the present invention will be described. 10 is a side view showing a multi-type wind power generator according to a fifth embodiment of the present invention.

Referring to FIG. 10, the multi-type wind power generator 50 according to the fifth embodiment includes a tower 100, a main nacelle 300, an upper support arm 4510, a lower support arm 4520, and an upper power generation. Unit 4700, and bottom power generation unit 4600. Since the multi-type wind generator 50 according to the fifth embodiment has the same structure as the multi-type wind generator according to the second embodiment except for the upper power generation unit 4700 and the lower power generation unit 4600, the same configuration Duplicate description of the description will be omitted.

The upper power generation unit 4700 includes an upper sub nacelle 4730 fixed to the upper support arm 4510 and an upper rotor 4710 rotatably coupled to the upper sub nacelle 4730. The upper rotor 4710 also includes a hub 4713 and a plurality of upper blades 4711 coupled to the hub 4713.

The lower power generation unit 4600 includes a lower sub nacelle 4630 fixed to the lower support arm 4520 and a lower rotor 4610 rotatably coupled to the lower sub nacelle 4630. The lower rotor 4610 also includes a hub 4613 and a plurality of lower blades 4611 coupled to the hub 4613.

The upper rotor 4710 and the lower rotor 4610 are spaced apart in the front-rear direction, and the upper rotor 4710 may be located further forward than the lower rotor 4610. The upper support arm 4510 may be fixed to the main nacelle 300 at an earlier portion in the direction of the axis MX5 of the main nacelle 300 than the lower support arm 4520.

Meanwhile, the upper rotor 4710 is disposed in front of the upper sub nacelle 4730, and the lower rotor 4610 is disposed behind the lower sub nacelle 4630. Accordingly, the upper power generation unit 4700 may be of an upwind type, and the lower power generation unit 4600 may be of a downwind type.

When the rotors of the upper power generation unit 4700 and the lower power generation unit 4600 are disposed in different directions as in the fifth embodiment, the distance between the upper rotor 4710 and the lower rotor 4610 may be further increased.

As mentioned above, although an embodiment of the present invention has been described, those of ordinary skill in the art may add, change, delete or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, etc., which will also be included within the scope of the present invention.

10, 20, 30, 40, 50: multi wind generator
100: tower
300: main nacelle
510, 1510, 2510, 3510, 4510: upper support arm
520, 1520, 2520, 3520, 4520: Lower Support Arm
600, 1600, 2600, 3600, 4600: lower generation unit
610, 1610, 2610, 3610, 4610: lower rotor
611, 1611, 2611, 3611, 4611: lower blade
613, 1613, 2613, 3613, 4613: Hub
630, 1630, 2630, 3630, 4630: lower sub nacelle
700, 1700, 2700, 3700, 4700: Upper Generation Unit
710, 1710, 2710, 3710, 4710: upper rotor
713, 1713, 2713, 3713, 4713: Hub
711, 1711, 2711, 3711, 4711: upper blade
730, 1730, 2730, 3730, 4730: upper sub nacelle
740: main shaft
750 gearbox
760: brake
770: generator

Claims (15)

tower;
A plurality of lower support arms fixed to the tower and extending downward from the tower;
A plurality of upper support arms fixed to the tower and extending upward from the tower;
A lower power generation unit fixed to the lower support arm and having a lower rotor and a generator; And
An upper power generation unit located above the lower power generation unit and fixed to the upper support arm and having an upper rotor and a generator;
Including,
The upper rotor and the lower rotor is a multi-type wind generator, characterized in that spaced apart in the front and rear directions. The method of claim 1,
The front end of the upper rotor is a multi-type wind generator, characterized in that disposed behind the interval at the rear end of the lower rotor. The method of claim 1,
The rear end of the upper rotor is a multi-type wind generator, characterized in that disposed in front of the interval at the front end of the lower rotor. The method of claim 1,
The tower further includes a main nacelle rotatably installed, wherein the main nacelle has a longitudinal direction extending in a direction crossing the height direction of the tower,
The main nacelle is provided with a first fixing part to which the upper support arm is fixed and a second fixing part to which the lower support arm is fixed, and the first fixing part and the second fixing part are spaced apart in the longitudinal direction of the main nacelle. Multi-type wind generator characterized in that. The method of claim 4, wherein
And the first fixing part and the second fixing part are located on different sides with respect to the first virtual plane passing through the center of the tower and perpendicular to the longitudinal direction of the main nacelle. The method of claim 1,
The tower further includes a main nacelle rotatably installed, the main nacelle having a longitudinal direction and a lateral direction extending in a direction crossing the height direction of the tower, wherein the upper support arm and the lower support arm are the tower. Multi-type wind generator, characterized in that arranged inclined at different angles in the lateral direction. The method of claim 1,
The tower further includes a main nacelle rotatably installed, the main nacelle having a longitudinal direction and a lateral direction extending in a direction crossing the height direction of the tower, wherein the upper support arm and the lower support arm are the tower. Multi-type wind generator, characterized in that arranged inclined at different angles in the longitudinal direction of the. The method of claim 1,
The lower rotor and the upper rotor is a multi-type wind power generator, characterized in that spaced apart from each other in the lateral direction of the tower from the center of the tower. The method of claim 8,
And the lower rotor is disposed farther from the center of the tower than the upper rotor. The method of claim 8,
And the upper rotor is disposed farther from the center of the tower than the lower rotor. The method of claim 1,
The upper rotor includes an upper sub nacelle and an upper blade rotatably mounted to the upper sub nacelle,
The lower rotor includes a lower blade and a lower blade rotatably installed on the lower sub nacelle,
And the upper blade is installed at the front end of the upper sub nacelle, and the lower blade is installed at a rear end of the lower sub nacelle. The method of claim 1,
The upper rotor includes an upper sub nacelle and an upper blade rotatably mounted to the upper sub nacelle,
The lower rotor includes a lower blade and a lower blade rotatably installed on the lower sub nacelle,
The upper blade is installed at the rear end of the upper sub nacelle, the lower blade is a multi-type wind generator, characterized in that installed in the front end of the lower sub nacelle. The method of claim 1,
And the upper support arm and the lower support arm have different lengths. tower;
A plurality of lower support arms fixed to the tower and extending downward from the tower;
A plurality of upper support arms fixed to the tower and extending upward from the tower;
A lower power generation unit fixed to the lower support arm and having a lower rotor and a generator; And
An upper power generation unit located above the lower power generation unit and fixed to the upper support arm and having an upper rotor and a generator;
Including,
The upper rotor and the upper rotor is a multi-type wind power generator, characterized in that spaced apart from each other in the lateral direction of the tower from the center of the tower. tower;
A plurality of lower support arms fixed to the tower and extending downward from the tower;
A plurality of upper support arms fixed to the tower and extending upward from the tower;
A lower power generation unit fixed to the lower support arm and having a lower rotor rotatably installed on the lower sub nacelle and the lower sub nacelle, and installed inside the lower sub nacelle and connected to the lower rotor; And
A generator located above the lower power generation unit, fixedly installed on the upper support arm and installed in the upper rotor and the upper sub nacelle rotatably installed with respect to the upper sub nacelle and the upper sub nacelle and connected to the lower rotor. An upper power generation unit having a;
Including,
One of the lower rotor and the upper rotor is installed in front of the upper sub nacelle or the lower sub nacelle, the other is a multi-type wind power generator, characterized in that installed behind the upper sub nacelle or the lower sub nacelle.

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