KR20190098501A - Multi type wind turbine - Google Patents

Abstract

The present invention provides a multi-type wind turbine, which comprises: a tower; a main nacelle rotationally coupled to the tower; a plurality of support arms radially installed in the main nacelle; a plurality of unit power generation units installed in an end portion of each of the support arms; and a yawing system installed at an internal side or an external side of the tower, and including first and second yaw bearings installed to be spaced from each other in a longitudinal direction of the tower. Moreover, at least one of the first and second yaw bearings forms a pair.

Description

Multi-type Wind Generators {MULTI TYPE WIND TURBINE}

The present invention relates to a wind generator, and more particularly to a multi-type wind power generator is provided with 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. Multi-type wind generators install a single main nacelle rotatable by a yawing system in one tower, radially combine a plurality of support arms in the main nacelle, and install a unit power generation unit in each support arm. Doing. 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.

Since a plurality of unit power generation units are installed and operated in a single main nacelle, the load is concentrated in the yawing system, so that the outer diameters of the tower and the yaw bearing need to be increased to prevent breakage.

Republic of Korea Patent Publication No. 10-2011-0089293 (2011.08.05)

The present invention seeks to provide a multi-type wind generator capable of withstanding loads concentrated in the yawing system.

According to an aspect of the present invention, there is provided a multi-type wind power generator, a tower, a main nacelle rotatably coupled to a tower, a plurality of support arms radially installed on the main nacelle, a plurality of unit power generation units installed at ends of each support arm, and a tower. And an yawing system installed on an inner side or an outer side of the tower, the yawing system including first and second yaw bearings spaced apart from each other in the longitudinal direction of the tower, wherein at least one of the first and second yaw bearings is formed in a pair.

In addition, the yawing system is fixed to one side of the main nacelle, the yaw drive motor provided with a pinion gear for transmitting power, and the inner or outer ring outer peripheral surface of the upper and the first and second yaw bearings are formed to move the pinion gear It further comprises a connecting shaft for rotatably connecting the inner and outer rings of the upper and lower teeth is not formed of the teeth and the first and second yaw bearings connected to each other.

In addition, a yaw bearing consisting of a pair of first and second yaw bearings is stacked along the longitudinal direction of the tower.

In addition, the first yaw bearing is composed of a first inner ring coupled to the main frame of the main nacelle and rotatably connected to one side of the connecting shaft, and a first outer ring fixed to the tower to support the first inner ring. The bearing is composed of a second inner ring rotatably connected to the other side of the connecting shaft and a second outer ring fixed to the tower to support the second inner ring.

In addition, the connecting shaft is formed in a tubular shape extending in the longitudinal direction of the tower.

In addition, a plate-shaped platform is provided on the inner circumferential surface of the connecting shaft.

The tower is formed in a multi-stage configuration in which a plurality of tubular members are stacked, and a plate-like platform is provided on the inner circumferential surface thereof.

In addition, the yawing system further includes a brake portion that is installed to correspond to at least one of the first and second yaw bearings to stop the operation of the yawing system.

In addition, the brake unit includes a first brake caliper supported by the main frame of the main nacelle, and a first brake including a first brake disc inserted at one side of the first brake caliper and fixed at the other side of the tower.

In addition, the brake unit includes a second brake caliper fixed to the tower, and a second brake including a second brake disc inserted at one side of the second brake caliper and fixed at the other side to the connecting shaft.

As described above, according to the multi-type wind power generator according to the present invention, there is an advantage that the load concentrated in the yawing system can be distributed to the tower without increasing the outer diameter of the tower and the yaw bearing.

1 is a perspective view showing a multi-type wind power generator according to an embodiment of the present invention.
FIG. 2 is a view schematically illustrating the interior of the main nacelle of FIG. 1.
3 is a cross-sectional view taken along the line III-III of FIG. 2.
4 is a view illustrating the interior of the unit power generation unit of FIG. 1.
5 is a cross-sectional view illustrating a modified example of FIG. 3.
Figure 6 is a cross-sectional view showing the inside of the turbine of the multi-type wind generator according to another embodiment of the present invention.
7 is a cross-sectional view illustrating a modified example of FIG. 6.

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

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. The present invention should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined, it can be applied to a variety of transformations and have a number of embodiments, to illustrate the specific embodiments and detailed description It will be described in detail. 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 4.

1 is a perspective view showing a multi-type wind power generator according to an embodiment of the present invention, Figure 2 is a view schematically showing the interior of the main nacelle of FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a view illustrating the interior of the unit power generation unit of FIG. 1.

Referring to FIG. 1, a multi-type wind generator 10 according to an embodiment of the present invention includes a tower 100, a yawing system 200, a main nacelle 300, a support arm 500, and a plurality of wind turbines. And a unit power generation unit 700.

The tower 100 is installed at a predetermined height from the ground, and may support the main nacelle 300, the plurality of unit power generation units 700, and the like. Tower 100 may have a tubular shape that increases in diameter 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 the top of the tower 100 and can be rotatably coupled to the tower 100, the rotation mechanism will be described later. A plurality of support arms 500 may be radially coupled to the main nacelle 300, and a unit power generation unit 700 may be coupled to an end of each of the plurality of support arms 500. That is, when the main nacelle 300 rotates with respect to the tower 100, the plurality of unit power generation units 700 may also rotate together with the main nacelle 300.

In this case, the main nacelle 300 may be formed in a shape similar to a conventional nacelle only in appearance, and may not include a gear box or a generator. However, the shape of the main nacelle 300 is not necessarily limited thereto, and may be formed in a cylindrical shape.

The support arm 500 is a member connecting the main nacelle 300 and the unit power generation unit 700 to each other. The support arm 500 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 support arm 500 may be provided with a staircase or a conveyor for maintenance of the unit power generation unit 700.

Meanwhile, a plurality of support arms 500 are coupled to the main nacelle 300. When the main nacelle 300 is viewed from the front, the same number of supports are provided on the left and right sides of the tower 100 based on the tower 100. Arm 500 is disposed. For example, as shown in FIG. 1, two support arms 500 are disposed on the left side of the tower 100, and two support arms 500 are disposed on the right side of the tower 100.

2 and 3, the yawing system 200 is disposed inside the main nacelle 300, and the unit power generation unit 700 is coupled so that the blade 711 of the unit power generation unit 700 faces the wind. The main nacelle 300 may be rotated. The yawing system 200 may include a yaw drive motor 210, a pinion gear 230, a pair of yaw bearings 240, a connecting shaft 260, and a brake 270.

The yaw drive motor 210 may be fixedly coupled to one side of the main nacelle 300, and the pinion gear 230 may be coupled to the lower end of the yaw drive motor 210. On the other hand, the teeth 250 are formed on the outer circumferential surface of the outer ring 241 of the upper yaw bearing 240, the pinion gear 230 of the yaw drive motor 210 may be gear coupled to the teeth (250). At this time, the pinion gear 230 is rotated in accordance with the drive of the yaw drive motor 210, the pinion gear 230 is rotated along the teeth (250). Therefore, when the yaw drive motor 210 rotates, the main nacelle 300 to which the yaw drive motor 210 is coupled is to yaw on the tower 100.

The tower 100 and the main nacelle 300 may be connected to each other via a pair of yaw bearings 240 so that the main nacelle 300 may rotate, that is, yaw, with respect to the tower 100 fixed to the ground. .

As shown in FIG. 3, the pair of yaw bearings 240 is divided into an upper first yaw bearing 241 and a lower second yaw bearing 242. The upper first yaw bearing 241 is divided into a first inner ring 241-1 and a first outer ring 241-2, and the first inner ring 241-1 is a main frame 310 of the main nacelle 300. ) And the first outer ring 241-2 may be fixed to the tower 100. In addition, the lower second yaw bearing 242 is divided into a second inner ring 242-1 and a second outer ring 242-2, and the second inner ring 242-1 is formed of a first yaw bearing 241. The connection shaft 260 supported by the first inner ring 241-1 and the second outer ring 242-2 may be fixed to the tower 100.

The yawing system 200 has a pair of upper and lower yaw bearings 240 are spaced apart in the longitudinal direction of the tower 100, the rotation of the pair of yaw bearings 240 through the connecting shaft 260 By supporting each other, it becomes possible to distribute the concentrated load.

The connecting shaft 260 is a tubular shape having a predetermined length extending in the longitudinal direction of the tower 100, the first inner ring 241-1 of the first yaw bearing 241 and the second inner ring of the second yaw bearing 242. 242-1 may be rotatably installed by connecting to each other. The connecting shaft 260 may be supported by at least one plate-shaped platform 261 installed on the inner circumferential surface thereof.

The brake unit 270 may be installed to correspond to at least one of the first yaw bearing 241 and the second yaw bearing 242 to stop the operation of the yawing system 200. To this end, the brake unit 270 may be divided into a first brake 271 and a second brake 272. The first brake 271 has a first brake caliper 271-1 supported on the main frame 310 of the main nacelle 300, one side of which is inserted into the first brake caliper 271-1, and the other side of the first brake caliper 271-1 is a tower ( It may be composed of a first brake disk (271-2) fixed to the 100. In addition, the second brake 272 is fixed to the second brake caliper 272-1 installed on the tower 100, one side is inserted into the second brake caliper 272-1 and the other side is fixed to the connecting shaft 260 And a second brake disc 272-2. According to this structure, when the rotation of the main nacelle 300 is to be stopped, the object can be achieved by applying hydraulic pressure or pneumatic pressure to the brake caliper to press the corresponding brake disk.

Referring to FIG. 4, each unit power generation unit 700 may be fixedly coupled to the main nacelle 300 through each support arm 500 to individually produce electricity by the rotation of the rotor 710.

The unit power generation unit 700 coupled to the end of the support arm 500 generates electricity using wind, and includes a rotor 710, a sub nacelle 730, a main shaft 740, and a speed increaser ( gearbox 750, brake 760 and generator 770.

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

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

The 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 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 speed increaser 750 is a device that converts the rotational speed of the main shaft 740 rotated by the blade 711 by the gear to a rotational speed suitable for power generation. The speed increaser 750 includes a plurality of gears. A speed increase gear part (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.

On the other hand, Figure 5 is a cross-sectional view showing a modified example of Figure 3, may be configured by reinforcing the upper and lower yaw bearing 240 for supporting the main nacelle (300). The reinforced upper and lower yaw bearings 240 may be divided into a pair of first yaw bearings 241 stacked on the upper side and a pair of second yaw bearings 242 stacked on the lower side. Each of the upper first yaw bearings 241 is divided into a first inner ring 241-1 and a first outer ring 241-2, and the first inner ring 241-1 is connected to the main frame of the main nacelle 300. The outer ring 241-2 and the first outer ring 241-2 may be fixed to the tower 100. In addition, each of the lower second yaw bearings 242 is divided into a second inner ring 242-1 and a second outer ring 242-2, and the second inner ring 242-1 is a first yaw bearing 240. It may be fixed to the connecting shaft 260 supported on the first inner ring 241-1 of the second outer ring 242-2 may be fixed to the tower 100.

The connecting shaft 260 is a tubular shape having a predetermined length and rotates by connecting the first inner ring 241-1 of the first yaw bearing 241 and the second inner ring 242-1 of the second yaw bearing 242 to each other. It can be installed possibly. The connecting shaft 260 may be supported by at least one plate-shaped platform 261 installed on the inner circumferential surface thereof.

The brake unit 270 may be installed to correspond to at least one of the first yaw bearing 241 and the second yaw bearing 242 to stop the operation of the yawing system 200. To this end, the brake unit 270 may be divided into a first brake 271 and a second brake 272. The first brake 271 has a first brake caliper 271-1 supported on the main frame 310 of the main nacelle 300, one side of which is inserted into the first brake caliper 271-1, and the other side of the first brake caliper 271-1 is a tower ( It may be composed of a first brake disk (271-2) fixed to the 100. In addition, the second brake 272 is fixed to the second brake caliper 272-1 installed on the tower 100, one side is inserted into the second brake caliper 272-1 and the other side is fixed to the connecting shaft 260 And a second brake disc 272-2.

Hereinafter, with reference to the accompanying drawings will be described in detail a multi-type wind power generator according to another embodiment of the present invention.

Figure 6 is a cross-sectional view showing the inside of the turbine of the multi-type wind generator according to another embodiment of the present invention. However, for the same configuration as the exemplary embodiment, the same reference numerals will be used to refer to FIG. 1.

As shown in FIG. 1, the multi-type wind generator 10 according to another embodiment of the present invention includes a tower 100, a yawing system 200, a main nacelle 300, a support arm 500, and a plurality of units. And a power generation unit 700.

The tower 100 is installed at a predetermined height from the ground, and may support the main nacelle 300, the plurality of unit power generation units 700, and the like. Tower 100 may have a tubular shape that increases in diameter 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. In addition, the tower 100 may be supported by at least one plate-shaped platform 110 is installed on the inner peripheral surface.

Main nacelle (300) is located on the top of the tower 100 and can be rotatably coupled to the tower 100, the rotation mechanism will be described later. A plurality of support arms 500 may be radially coupled to the main nacelle 300, and a unit power generation unit 700 may be coupled to an end of each of the plurality of support arms 500. That is, when the main nacelle 300 rotates with respect to the tower 100, the plurality of unit power generation units 700 may also rotate together with the main nacelle 300.

In this case, the main nacelle 300 may be formed in a shape similar to a conventional nacelle only in appearance, and may not include a gear box or a generator. However, the shape of the main nacelle 300 is not necessarily limited thereto, and may be formed in a cylindrical shape.

The support arm 500 is a member connecting the main nacelle 300 and the unit power generation unit 700 to each other. The support arm 500 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 support arm 500 may be provided with a staircase or a conveyor for maintenance of the unit power generation unit 700.

Each unit power generation unit 700 may be fixedly coupled to the main nacelle 300 via each support arm 500 to individually produce electricity by rotation of the rotor.

Meanwhile, a plurality of support arms 500 are coupled to the main nacelle 300. When the main nacelle 300 is viewed from the front, the same number of supports are provided on the left and right sides of the tower 100 based on the tower 100. Arm 500 is disposed. For example, as shown in FIG. 1, two support arms 500 are disposed on the left side of the tower 100, and two support arms 500 are disposed on the right side of the tower 100.

The yawing system 200 is disposed inside the main nacelle 300 to rotate the main nacelle 300 to which the unit power generation unit 700 is coupled so that the blade 711 of the unit power generation unit 700 faces the wind. have. The yawing system 200 may include a yaw drive motor (not shown), a pair of upper and lower yaw bearings 220, a pinion gear (not shown), a connecting shaft 280, and a brake 290.

The yaw drive motor may be fixedly coupled to one side of the main nacelle 300, and a pinion gear may be coupled to a lower end of the yaw drive motor. On the other hand, teeth (not shown) are formed on the inner circumferential surface of the upper yaw bearing 220, the pinion gear of the yaw drive motor may be gear coupled to the teeth.

At this time, the pinion gear rotates as the yaw drive motor is driven, and the pinion gear rotates along the teeth. Therefore, when the yaw drive motor rotates, the main nacelle 300 coupled with the yaw drive motor performs yawing motion on the tower 100.

The tower 100 and the main nacelle 300 are connected to each other via a pair of yaw bearings 220, and the main nacelle 300 is rotated with respect to the tower 100 fixed to the ground by the yaw bearings 220. That is, you can do a yawing exercise.

As shown in FIG. 6, the yaw bearing 220 may be divided into an upper first yaw bearing 221 and a lower second yaw bearing 222. The upper first yaw bearing 221 is divided into a first inner ring 221-1 and a first outer ring 221-2, and the first inner ring 221-1 is fixed to the tower 100 and the first outer ring Reference numeral 221-2 may be fixed to the main frame 310 of the main nacelle 300. In addition, the lower second yaw bearing 222 is divided into a second inner ring 222-1 and a second outer ring 222-2, and the second inner ring 222-1 is fixed to the tower 100, and The outer ring 222-2 may be fixed to the connecting shaft 280 supported by the first outer ring 221-2 of the first yaw bearing 220. That is, according to this embodiment, the tower 100 is located inside the connection shaft 280, the tower 100 and the connection shaft 280 is rotatably coupled via a pair of yaw bearing 220. Can be.

The connecting shaft 280 is a tubular shape having a predetermined length extending in the longitudinal direction of the tower 100 and the first outer ring 221-2 of the first yaw bearing 221 and the second outer ring of the second yaw bearing 222. 222-2 may be rotatably installed by connecting to each other.

The brake unit 290 may be installed to correspond to the upper first yaw bearing 221 to stop the operation of the yawing system 200. To this end, the brake unit 290 includes a brake caliper 291 supported by the main frame 310 of the main nacelle 300, and a brake disc having one side inserted into the brake caliper 291 and the other side fixed to the tower 100. 292. According to this structure, when the rotation of the main nacelle 300 is to be stopped, the object can be achieved by applying hydraulic pressure or pneumatic pressure to the brake caliper 291 to press the brake disc 292.

FIG. 7 is a cross-sectional view illustrating a modified example of FIG. 6, and may be configured by reinforcing a yaw bearing 220 supporting the main nacelle 300. The reinforced yaw bearing 220 is divided into an upper first yaw bearing 221 and a pair of second yaw bearings 222 stacked below. The upper first yaw bearing 221 is divided into a first inner ring 221-1 and a first outer ring 221-2, and the first inner ring 221-1 is fixed to the tower 100 and the first outer ring Reference numeral 221-2 may be fixed to the main frame 310 of the main nacelle 300. In addition, each of the lower second yaw bearings 222 is divided into a second inner ring 222-1 and a second outer ring 222-2, and the second inner ring 222-1 is fixed to the tower 100. The second outer ring 222-2 may be fixed to the connecting shaft 260 supported by the first outer ring 221-2 of the first yaw bearing 220.

The connecting shaft 280 is a tubular shape having a predetermined length to rotate by connecting the first outer ring 221-2 of the first yaw bearing 221 and the second outer ring 222-2 of the second yaw bearing 222 to each other. It can be installed possibly.

The brake unit 290 may be installed to correspond to the first yaw bearing 221 to stop the operation of the yawing system 200. To this end, the brake unit 290 includes a brake caliper 291 supported by the main frame 310 of the main nacelle 300, and a brake disc having one side inserted into the brake caliper 291 and the other side fixed to the tower 100. 292.

According to the multi-type wind generator of the present invention as described above, there is an advantage that the load concentrated in the yawing system can be distributed to the tower without increasing the outer diameter of the tower and the yaw bearing.

As described above, the present invention has been described through limited embodiments and drawings, but the present invention is not limited thereto, and the present invention has been described below by the person skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of the claims.

100: tower
200: yawing system
210: yaw drive motor
220, 240: Upper and lower yaw bearings
230: pinion gear
250: fierce
260, 280: connecting shaft
270, 290: brake part
300: main nacelle
500: support arm
700: multiple unit power generation unit

Claims (10)

tower;
A main nacelle rotatably coupled to the tower;
A plurality of support arms radially installed on the main nacelle;
A plurality of unit power generation units provided at ends of the respective support arms; And
And a yawing system installed inside or outside the tower, the yawing system including first and second yaw bearings spaced apart from each other in the longitudinal direction of the tower.
At least one of the first and second yaw bearing is a multi-type wind generator, characterized in that consisting of a pair. The method of claim 1,
The yawing system,
A yaw drive motor fixedly coupled to one side of the main nacelle and provided with a pinion gear to which power is transmitted;
Teeth formed on an inner circumferential or outer ring outer circumferential surface of an upper side of the first and second yaw bearings so that the pinion gear is movable; And
And a coupling shaft configured to rotatably connect the inner and outer rings of the upper and lower sides of the first and second yaw bearings in which the teeth are not formed. The method of claim 2,
Yaw bearing consisting of a pair of the first and second yaw bearing,
Multi-type wind generator, characterized in that stacked along the longitudinal direction of the tower. The method of claim 3,
The first yaw bearing,
A first inner ring coupled to the main frame of the main nacelle and rotatably connected to one side of the connection shaft, and a first outer ring fixed to the tower to support the first inner ring,
The second yaw bearing,
And a second inner ring rotatably connected to the other side of the connecting shaft, and a second outer ring fixed to the tower to support the second inner ring. The method of claim 2,
The connecting shaft,
Multi-type wind generator characterized in that formed in the tubular shape extending in the longitudinal direction of the tower. The method of claim 5,
On the inner circumferential surface of the connecting shaft,
Multi-type wind generator characterized in that the plate-shaped platform is installed. The method of claim 1,
The tower,
The multi-type wind generator is formed in a multi-stage form of a plurality of tubular members stacked, the plate-shaped platform is installed on the inner peripheral surface. The method of claim 4, wherein
The yawing system,
And a brake unit installed to correspond to at least one of the first and second yaw bearings to stop the operation of the yawing system. The method of claim 8,
The brake unit,
A first brake caliper supported by the main frame of the main nacelle,
And a first brake having one side inserted into the first brake caliper and the other side comprising a first brake disk fixed to the tower. The method of claim 8,
The brake unit,
A second brake caliper fixed to the tower,
And a second brake having one side inserted into the second brake caliper and the other side composed of a second brake disk fixed to the connecting shaft.

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