KR101988163B1 - Wind turbine, apparatus and mehtod for installing the same - Google Patents

Abstract

The present invention relates to a wind power generator capable of being installed without using an external crane, and an installation apparatus and an installation method thereof. According to one embodiment of the present invention, a wind power generator installation apparatus comprises: an uprightly installed tower; a main nacelle including a coupling hole penetrating the tower thereinto to be coupled to the tower; a winch disposed on the inner bottom part of the tower and winding or unwinding a wire; a fixed pulley unit disposed on the outer top part of the tower; and a moving pulley unit connected to the outer part of the main nacelle and upwardly lifted by the wire to move the main nacelle to the upper part of the tower along the tower, wherein the wire discharged from the winch has one end fixed to a tower side through the fixed and moving pulley units. According to an embodiment of the present invention, the wind power generator is easily installed without using a large crane, thereby reducing installation costs. Moreover, in the case of disassembly, the wind power generator can be easily disassembled at low costs.

Description

[0001] WIND TURBINE, APPARATUS AND MEHTOD FOR INSTALLING THE SAME [0002]

The present invention relates to a wind turbine generator, an installation device and a method for installing the same, and more particularly, to a wind turbine generator installed without using an external crane, and a mounting device and a mounting method thereof.

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

Wind power generation is one of the most economical new and renewable energy sources that have been developed so far, and it has been actively investing in Europe, the Americas and Asia, to be.

Such a wind turbine generator for wind power generation can be classified into a vertical axis wind turbine and a horizontal axis wind turbine depending on the direction of the rotation axis. Until now, the efficiency of the horizontal axis wind turbine is higher and more stable than the vertical axis, so horizontal axis wind turbine is mostly applied to the commercial wind turbine.

Conventional horizontal axis wind turbines must be equipped with generators that increase the size of the blades or have a capacity corresponding to the blade size in order to obtain a lot of power. However, as the blade size increases and the generator capacity increases, the weight of the blades and the generator increases, so the size of the tower and structures to support the heavy blades and generators must increase in size. If the power generation facilities including blades and generators become heavy, Such as bearings for support of the wind turbine, must be increased and a separate special device must be installed for yaw operation which returns the direction of the rotor in accordance with the wind direction.

Generally, large cranes are used to transport nacelles and blades to the top of the tower, which increases the installation and maintenance expense exponentially. Due to this technological difficulty and cost increase, a wide range of wind turbine generators There has been a problem of causing a great obstacle to the supply.

One aspect of the present invention is to provide a wind turbine that can be installed without using a crane, and an apparatus and method for installing the same.

The wind turbine installation apparatus according to an embodiment of the present invention includes a tower that stands up and a main nacelle that has a coupling hole through which the tower is coupled to the tower. And a winch disposed at an inner lower end of the tower and unwinding or winding the wire; A stationary pulley unit disposed at an outer upper end of the tower; And a moving pulley unit connected to the outside of the main nacelle and pulled upward by a wire to move the main nacelle along the tower to an upper portion of the tower. The wire discharged from the winch is passed through a fixed pulley unit and a moving pulley unit One end is fixed to the tower side.

In the apparatus for installing a wind turbine generator according to an embodiment of the present invention, the stationary pulley unit includes a plurality of stationary pulleys, the moving pulley unit includes a plurality of moving pulleys, and the wires alternate between the stationary pulleys and the moving pulleys As shown in FIG.

Here, in the fixed pulley unit, a plurality of fixed pulleys are arranged on the same axis at regular intervals, and the moving pulley unit can be arranged with a plurality of moving pulleys on the same axis at regular intervals.

Here, the fixed pulley unit is disposed on a shaft in which a plurality of fixed pulleys are arranged in parallel to each other, and the moving pulley unit can be disposed on an axis in which a plurality of moving pulleys are arranged in parallel to each other.

In the wind turbine installing apparatus according to an embodiment of the present invention, the apparatus may include at least one guide pulley unit disposed on the path of the wire passing between the winch and the stationary pulley unit and guiding the wire.

The wind turbine installation apparatus according to an embodiment of the present invention may further include a buffer disposed between the inner side surface of the coupling hole and the outer side of the tower to prevent collision between the coupling hole and the tower. Here, the buffer portion may be formed in the form of a wheel that rotates in the vertical direction.

According to an aspect of the present invention, there is provided a method of installing a wind turbine generator including a tower installed in a standing position and a main nacelle rotatably coupled to an upper portion of a tower, To be inserted into the tower; And a moving pulley unit connected to the outside of the main nacelle and moving up and down by a wire, the moving pulley unit being disposed at an inner lower end of the tower and releasing or winding the wire; Installing a wire, which is discharged from a winch, through the fixed pulley unit and the moving pulley unit so that one end of the wire is fixed to the tower side; Pulling a moving pulley unit and a main nacelle connected to the moving pulley unit along the tower to the top of the tower; And securing the top of the tower and the main nacelle.

In the method of installing a wind turbine generator according to an embodiment of the present invention, the stationary pulley unit includes a plurality of stationary pulleys, and the moving pulley unit may include a plurality of moving pulleys. In the step of installing the wire, the wire may be arranged so as to alternately pass a plurality of stationary pulleys and a moving pulley.

A wind turbine according to an embodiment of the present invention includes: a tower that is erected and installed; A main nacelle having a coupling hole through which the tower penetrates and engaging with the tower; And at least one installation unit for transporting the main nacelle along the tower to the top of the tower. The installation unit includes a winch disposed at an inner lower end of the tower, a winch for unwinding or winding the wire, a fixed pulley unit disposed at an outer upper end of the tower, a main pulley unit connected to the outside of the main nacelle, And a moving pulley unit moving the towers along the tower to an upper portion of the tower. The wires discharged from the winch can be fixed to the tower side through the stationary pulley unit and the moving pulley unit.

A wind turbine according to an embodiment of the present invention includes: a tower that is erected and installed; A main nacelle rotatably coupled to an upper portion of the tower; A plurality of support arms coupled to the main nacelle; A sub nacelle fixedly attached to an end of each support arm; And a mounting unit for transferring the sub nacelle to the support arm end. The installation unit includes a winch disposed at an inner lower end of the tower, a winch for unwinding or winding the wire, a fixed pulley unit disposed at an outer end of the support arm, And a moving pulley unit for moving the nacelle to the support arm end. The wire discharged from the winch is fixed at one end to the support arm side via the fixed pulley unit and the moving pulley unit.

According to the embodiments of the present invention, the installation cost can be reduced by installing the wind turbine generator easily without using a large crane. Even when the wind power generator is dismantled, it can be easily dismantled at a low cost.

1 is a perspective view illustrating a wind turbine according to an embodiment of the present invention.
FIG. 2 is a view showing the inside of the unit power generation unit of FIG. 1. FIG.
FIGS. 3A to 3C are operation diagrams schematically showing the operation of the installation unit (wind turbine installation device) of the wind turbine generator according to the embodiment of the present invention.
4A and 4B are perspective views showing a modification of the fixed pulley unit and the moving pulley unit in the installation unit (wind power generator installation apparatus) of the wind power generator according to the embodiment of the present invention.
5 is a plan view showing a cushioning portion in an installation unit (a wind power generator installation device) of a wind power generator according to an embodiment of the present invention.
6 is a perspective view schematically showing an installation unit (wind turbine installation device) of a wind turbine generator according to another embodiment of the present invention.

Hereinafter, the wind turbine generator, the installation device, and the installation method according to the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

Also, throughout the specification, when an element is referred to as " including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, throughout the specification, the term " on " means to be located above or below a target portion, and does not necessarily mean that the target portion is located on the image side with respect to the gravitational direction.

FIG. 1 is a perspective view showing a wind turbine according to an embodiment of the present invention, and FIG. 2 is a view showing the inside of the unit power generation unit of FIG.

1 and 2, a wind turbine 10 according to the present embodiment includes a tower 100, a main nacelle 300, and at least one installation unit 600.

The wind turbine 10 according to the present embodiment may further include a support arm 500 and a plurality of unit generators 700. In the multi-type wind power generator 10 according to the present embodiment, a plurality of unit generation units 700 for individually generating electricity by rotation of the rotor 710 are arranged, and each of the plurality of unit generation units 700 is supported by a support And may be fixedly coupled to the main nacelle 300 through the arm 500.

The tower 100 is installed upright at a predetermined height from the ground, and can support the main nacelle 300, a plurality of unit generators 700, and the like. The tower 100 may have a tubular shape having a uniform diameter, or may have a tubular shape whose diameter increases from the upper end to the lower end. At this time, the tower 100 may be formed in a multi-tiered structure in which a plurality of tubular members are stacked. In the meantime, a step, a conveyor, or an elevator for transferring an operator or a work tool for maintenance of the unit generator unit 700 may be installed in the tower 100. In the present embodiment, the cross section of the tower 100 is formed in a circular shape, but the present invention is not limited thereto and may be formed in various shapes of polygonal cross-sections.

A tower flange 110 may be formed on the top of the tower 100. The tower flange 110 is formed in the same shape as the tower cross section, in the present embodiment, in a circular shape, and may protrude outward from the outer circumferential surface of the tower 100 to have a step. The diameter of the tower flange 110 is formed to be larger than the diameter of the coupling hole 320 of the main nacelle to be described later so as to prevent the main nacelle 300 from being detached when the tower 100 is pulled upward. The power flange 110 is fastened to the nacelle flange 310 of the main nacelle 300.

A main nacelle 300 is positioned on top of the tower 100 and may be rotatably coupled to the tower 100. A plurality of support arms 500 are radially coupled to the main nacelle 300 and unit generators 700 may be coupled to ends of the plurality of support arms 500. That is, when the main nacelle 300 rotates with respect to the tower 100, a plurality of unit generators 700 can rotate together with the main nacelle 300.

At this time, the main nacelle 300 is formed in a shape similar to a normal nacelle shape only, and a gear box, a generator, or the like may not be provided therein. However, the shape of the main nacelle 300 is not limited thereto, but may be a cylindrical shape.

The main nacelle 300 includes a coupling hole 320 penetrating the tower 100 in a vertical direction to insert the tower 100 therein. The coupling holes 320 are formed corresponding to the cross-sectional shape of the tower 100, and in this embodiment, have a circular cross-section corresponding to the cross-section of the circular tower 100.

A nacelle flange 310 is formed along the entrance at the upper entrance of the coupling hole 320 and may be formed corresponding to the shape of the tower flange 110. The bottom surface of the tower flange 110 and the top surface of the nacelle flange 310 are brought into contact with each other when the main nacelle 300 is transferred to the top of the tower 100. When the top flange 110 and the nacelle flange 310 are fastened So that the tower 100 and the main nacelle 300 can be coupled.

The support arm 500 is a member that connects the main nacelle 300 and the unit power generation unit 700 to each other. The support arm 500 may have a smaller diameter as the distance from the main nacelle 300 or a tubular shape having a uniform diameter. At this time, the support arm 500 may be provided with a staircase or a conveyor for maintenance of the unit generator unit 700.

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 The 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.

A yawing system is disposed in the main nacelle 300 to rotate the main nacelle 300 coupled with the unit generating unit 700 such that the blade 711 of the unit generating unit 700 faces the wind .

The tower 100 and the main nacelle 300 are connected to each other via a yaw bearing (not shown). The main nacelle 300 rotates about the tower 100 fixed to the ground by a yaw bearing (not shown) That is, the yawing motion can be performed. The yaw bearing has an outer ring and an inner ring, the outer ring of the yaw bearing being fixed to the tower 100, and the inner ring of the yaw bearing being fixed to the main nacelle 300. However, the present invention is not limited to this, and the outer ring of the yaw bearing may be fixed to the main nacelle 300, and the inner ring of the yaw bearing may be fixed to the tower 100. [

Referring to FIG. 2, a unit power generation unit 700 coupled to an end of the support arm 500 generates electricity using wind and includes a rotor 710, a sub nacelle 730, a main shaft 740, a gearbox 750, a brake 760, and a generator 770.

The rotor 710 is rotatably installed in front of the sub nacelle 730 so that the rotational force generated by the rotor 710 is transmitted to the speed reducer 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 and rotatably installed on the front surface of the sub nacelle 730. [ The plurality of blades 711 are coupled to the outer peripheral surface of the hub 713 at predetermined intervals along the circumferential direction.

The hub 713 may be conically protruded forwardly to reduce wind resistance. The blade 711 rotates about the center axis of the hub 713 by the wind. The blade 711 has a streamlined cross section in the width direction, and a space portion can be formed inside.

The sub nacelle 730 is a housing for accommodating the speed changer 750, the generator 770, and the like, and may be formed in a generally hexahedral shape. However, the shape of the sub nacelle 730 is not limited to this, and may be a cylindrical shape or the like.

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

The speed changer 750 is a device for converting the rotational speed of the main shaft 740 rotated by the blade 711 to a rotational speed suitable for power generation using gears, And a speed increasing gear portion (not shown) is provided. On the other hand, an accelerator oil (not shown) may be provided in the gearbox 750 for lubricating and cooling a plurality of gears in the increased gear portion.

The brake 760 is disposed at a position adjacent to the speed changer 750, and can control the rotational force of the main shaft 740. At this time, the disk 770 can be mainly used for the brake 760.

The generator 770 is a device that generates electricity using input rotational energy, and is provided therein with a rotor (not shown) and a stator (not shown) fixedly connected to the rotating shaft. The rotor rotates at high speed around the stator to generate electricity.

FIGS. 3A to 3C are perspective views schematically showing a wind turbine installation unit (wind turbine installation apparatus) according to an embodiment of the present invention. FIGS. 4A and 4B are views showing a wind turbine installation Fig. 2 is a perspective view specifically showing a fixed pulley unit and a moving pulley unit in a unit (a wind power generator installation apparatus). The wind power generator installation device has the same configuration as the installation unit 600 and will be described together.

The installation unit 600 of the wind power generator includes a winch 610, a fixed pulley unit 640 and a moving pulley unit 650.

The winch 610 is disposed at the inner lower end of the tower 100 as a means of winding it around a cylindrical drum and pulling or pulling the weight. The winch 610 can unwind or wind the wire 620 to transfer the wind power generator components such as the main nacelle 300, the sub nacelle 730 and the like to the upper portion of the tower. The drum constituting the winch 610 is equipped with a clutch or a brake, so that power can be transmitted or disconnected from the prime mover. One end of the wire 620 discharged from the winch 610 is fixed to the side of the tower 100 via a fixed pulley unit 640 and a moving pulley unit 650 to be described later.

The fixed pulley unit 640 may be disposed at the outer upper end of the tower 620 to change the direction of the force acting on the wire 620 while supporting the wire 620. The rotary shaft position of the fixed pulley constituting the fixed pulley unit 640 is fixed to the tower 620 side.

The moving pulley unit 650 is connected to the outside of the main nacelle 300 and moves the main nacelle 300 along the tower 100 to the top of the tower 100 by pulling the wire 620 upwardly .

The fixed pulley unit 640 includes a plurality of fixed pulleys 6411, 6412 and 6413 and the movable pulley unit 650 may also include a plurality of moving pulleys 6511, 6512 and 6513 corresponding thereto , Where the wire 620 alternates between a plurality of stationary and moving pulleys. When the plurality of moving pulleys 6511, 6512, and 6513 are provided, the wire 620 disperses and supports the force in a plurality of strands, so that the greater the number of moving pulleys, the stronger the main nacelle 300 can be.

As shown in FIG. 4A, the fixed pulley unit 640a may have a plurality of fixed pulleys 6411, 6412, and 6413 arranged on the same axis 6420 at regular intervals. The moving pulley unit 650 may also be arranged at regular intervals on the same shaft 6520 in correspondence with the fixed pulley unit 640. The fixed pulleys 6411, 6412, and 6413 and the moving pulleys 6511, 6512, and 6513 can be alternately arranged with the fixed pulleys and the moving pulleys as viewed in the vertical direction.

The fixed pulley unit 640b may be disposed on the shafts 6421 and 6422, in which a plurality of fixed pulleys 6411 and 6412 are arranged in parallel, respectively, as shown in Fig. 4B. Correspondingly, the moving pulley unit 650 may also be disposed on an axis in which a plurality of moving pulleys 6511, 6512, and 6513 are arranged in parallel, respectively. The fixed pulleys 6411 and 6412 and the moving pulleys 6511 and 6512 and 6513 may be arranged in a row in the horizontal direction and the fixed pulleys and the moving pulleys may be alternately arranged in the vertical direction.

The guide pulley unit 630 is disposed on the path of the wire 620 passing between the winch 610 and the fixed pulley unit 640 to support the wire 620 and to guide the wire 620 smoothly And changes the path of the wire 620. At least one guide pulley unit 630 is disposed, disposed on the inner side wall of the tower, or disposed outside the tower (see 6311 and 6312 in Fig. 4B).

5 is a plan view showing a cushioning portion in an installation unit (a wind power generator installation device) of a wind power generator according to an embodiment of the present invention.

The diameter of the coupling hole 320 is formed to be slightly larger than the tower diameter 100 so that the main nacelle 300 can be smoothly transferred upwardly along the tower 100. At this time, The inner wall of the main nacelle 300 may collide with the outer wall of the tower 100. [

The buffer part 330 is disposed between the inner surface of the coupling hole 320 and the outer surface of the tower 100 to prevent the main nacelle 300 from directly colliding with the tower 100. The buffer part 330 may be disposed along the inner surface of the coupling hole 320 or along the outer surface of the tower 100.

The cushioning part 330 may be formed of a resilient member. The cushioning part 330 may include a wheel 331 that rotates in a vertical direction on the inner side surface of the coupling hole to smoothly transfer the main nacelle 300, 320 and a support 332 for providing a rotation axis.

Hereinafter, the installation unit (wind power generator installation device) and the installation method of the wind power generator will be described in detail with reference to the drawings.

First, the tower 100 is inserted into the coupling hole 320 provided in the main nacelle 300. When a plurality of tower assemblies formed by tubular members are stacked in a multi-stage configuration, a tower assembly is installed up to the first or second stage of the tower 100, and a small crane is used to connect the coupling holes 330 of the main nacelle Can be inserted.

(Installation unit) 600 is mounted on the wind turbine generator 10. The winch 610, the guide pulley unit 630, the fixed pulley unit 640, the moving pulley unit 650, and the like can be mounted in the above-described positions.

The wire 620 is discharged from the winch 610 and installed so as to be fixed at one end to the tower 100 side via the fixed pulley unit 640 and the moving pulley unit 650. [ The wire 620 is connected upwardly from the lower end of the tower 100 along the tower 100 along the tower 100 and connected in a downward direction by changing the direction via the fixed pulley unit 640, And connected to the upper side again and fixed to the upper end of the tower.

The wire 620 is then wound on the winch 610 to pull the moving pulley unit 650 and the main nacelle 300 connected thereto along the tower 100 to the top of the tower.

When the main nacelle 300 is transferred to the upper part of the tower 100, the upper part of the tower 100 and the main nacelle 300 are fixed. At this time, when the bottom surface of the tower flange 110 and the top surface of the nacelle flange 310 are brought into contact with each other, the tower 100 and the main nacelle 300 are joined by fastening the tower flange 110 and the nacelle flange 310 .

6 is a perspective view schematically showing an installation unit (wind turbine installation device) of a wind turbine generator according to another embodiment of the present invention.

The wind turbine according to the present embodiment is equipped with a mounting unit 600 for transferring a sub nacelle 730 from a multi-type wind turbine generator. The mounting unit 600 includes a winch 610, a wire 620, A fixed pulley unit 640, a moving pulley unit 650, and the like. The structure, operation method, and the like are the same as those in the above-described embodiment, so that duplicate technical features will not be described.

The fixed pulley unit 640 is disposed at the outer end of the support arm 500 and the movable pulley unit 650 is connected to the outside of the sub nacelle 700. The wire 620 is discharged from the winch 610 and is connected along the tower 100, the main nacelle 300 and the support arm 500, passes through the fixed pulley unit 640 at the outer end of the support arm, 630 and then fixed to one end of the support arm 500 side.

The guide pulley unit 630 is disposed on the path of the wire 620 holding the mail nacelle 300 and the support arm 500 from the tower 100 to support the wire 620. The wire 620 may be wound around the winch 610 to pull the sub nacelle 700 upward.

In the above description, when joining or connecting (joining) different elements, a separate joining member for joining the joining elements is provided. Further, additional sealing means for preventing leakage at the joint surface may be added as necessary. In addition, a fitting protrusion or groove may be formed for convenience of the bonding process and leakage prevention.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention.

100: tower 110: tower flange
300: main nacelle 310: nacelle flange
320: coupling hole 500: support arm
600: Wind turbine generator installation unit, installation unit
610: winch 620: wire
630: Guide pulley unit 640: Fixed pulley unit
650: moving pulley unit 700: unit generating unit

Claims (11)

1. An apparatus for installing a wind turbine generator comprising a main tower and a main nacelle having a coupling hole through which the tower passes,
A winch disposed at an inner lower end of the tower and unwinding or winding the wire;
A stationary pulley unit disposed at an outer upper end of the tower; And
And a moving pulley unit connected to the outside of the main nacelle and upwardly pulled by the wire to move the main nacelle to the top of the tower along the tower,
And the wire discharged from the winch is fixed to the tower side via the fixed pulley unit and the moving pulley unit. The method according to claim 1,
Wherein the fixed pulley unit includes a plurality of fixed pulleys,
Wherein the moving pulley unit includes a plurality of moving pulleys,
Wherein the wire is arranged so as to alternately pass the plurality of fixed pulleys and the moving pulley. 3. The method of claim 2,
In the fixed pulley unit, a plurality of fixed pulleys are arranged on the same axis at regular intervals,
Wherein the moving pulley unit has a plurality of moving pulleys arranged at equal intervals on the same axis. 3. The method of claim 2,
Wherein the fixed pulley unit is disposed on a shaft on which a plurality of fixed pulleys are arranged in parallel,
Wherein the moving pulley unit is disposed on a shaft on which a plurality of moving pulleys are arranged in parallel, respectively. The method according to claim 1,
And at least one guide pulley unit disposed on a path of a wire passing between the winch and the fixed pulley unit and guiding the wire. The method according to claim 1,
Further comprising a buffer disposed between the inner side of the coupling hole and the outer side of the tower to prevent collision between the coupling hole and the tower. The method according to claim 6,
The buffering portion
The wind turbine installation device being formed in a wheel shape that rotates in the vertical direction. CLAIMS 1. A method for installing a wind turbine generator comprising a tower that stands up and a main nacelle rotatably coupled to an upper portion of the tower,
Disposing the tower in a coupling hole provided in the main nacelle;
A moving pulley unit connected to the outside of the main nacelle and moving up and down by the wire, and a moving pulley unit disposed at an inner lower end of the tower and releasing or winding the wire, a stationary pulley unit disposed at an outer upper end of the tower, ;
Installing a wire discharged from the winch so that one end of the wire is fixed to the tower side via the stationary pulley unit and the moving pulley unit;
Winding the wire from the winch to pull the moving pulley unit and the main nacelle connected thereto along the tower to the top of the tower; And
And fastening the top of the tower and the main nacelle. 9. The method of claim 8,
Wherein the fixed pulley unit includes a plurality of fixed pulleys, the moving pulley unit includes a plurality of moving pulleys,
In the step of installing the wire,
And the wire is arranged so as to alternately pass the plurality of fixed pulleys and the moving pulleys. Standing tower;
A main nacelle having a coupling hole through which the tower penetrates to engage with the tower; And
And at least one installation unit for transferring the main nacelle to an upper portion of the tower along the tower,
The mounting unit
A winch disposed at an inner lower end of the tower and unwinding or winding the wire,
A fixed pulley unit disposed at an outer upper end of the tower,
And a moving pulley unit connected to the outside of the main nacelle and upwardly pulled by the wire to move the main nacelle to the top of the tower along the tower,
And the wire discharged from the winch is fixed at one end to the tower side via the fixed pulley unit and the moving pulley unit. Standing tower;
A main nacelle rotatably coupled to an upper portion of the tower;
A plurality of support arms coupled to the main nacelle;
A sub nacelle fixedly attached to an end of each of the support arms; And
And a mounting unit for transferring the sub-nacelle to the support arm end,
The mounting unit
A winch disposed at an inner lower end of the tower and unwinding or winding the wire,
A fixed pulley unit disposed at an outer end of the support arm,
And a moving pulley unit connected to the outside of the sub nacelle and pulled upward by the wire to move the sub nacelle to the support arm end,
And the wire discharged from the winch is fixed at one end to the support arm side via the fixed pulley unit and the moving pulley unit.

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