KR101508623B1 - Lifting device of rotor for wind turbine generator and install method of rotor using the same - Google Patents

Abstract

A lifting device for a rotor for lifting a rotor assembled on the ground and installing the rotor on the nacelle, and a method of installing the rotor using the lifting device. The lifter of the rotor includes a plurality of grippers provided at the root of each of the plurality of blades coupled to the hub, a first connecting beam connecting the two adjacent grippers of the plurality of grippers, A second linking beam for connecting the first linking beam and a linking part for installing a wire of the crane, a moving truck installed on the second linking beam so as to be movable along the longitudinal direction of the second linking beam, And a driving unit for moving the moving carriage.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a rotor for a wind turbine generator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a rotor for a wind turbine, and more particularly, to a lifter for lifting a rotor assembled on the ground and installing the rotor on a nacelle and a method of installing the rotor using the lifter.

A method of installing a rotor composed of a hub and a plurality of blades in a nacelle includes a method of assembling the rotor on the ground and lifting it up to install it in the nacelle, or installing the hub in the nacelle first and lifting the blades one by one and assembling them sequentially . Among them, the method of installing the rotor assembled on the ground and installing it on the nacelle is more stable and takes less time.

When assembling the rotor on the ground, the plurality of blades are positioned approximately parallel to the ground, while the plurality of blades are placed approximately perpendicular to the ground when installing the rotor in the nacelle. Conventionally, a rotor is installed in a nacelle using a large crane and a small crane.

That is, the wire of the large crane is installed at a position deviated from the center of gravity of the hub, and the wire of the small crane is installed on one blade, the two crane lifts the rotor horizontally, When the rotor goes up to a height that does not reach, the small crane is stopped and lifted by a large crane. Then, the rotor is vertically erected by its own weight.

However, in the above-described installation method, it is necessary to provide a specific lifting point (for example, a hook for hooking a hook of a crane) for installing a wire on the hub and increase the strength of the hub because the load of the whole rotor is applied to the hub during the lifting process. As a result, the weight of the hub becomes large. In addition, since a large-sized crane and a small-sized crane need to be used together, the construction time becomes longer and the construction cost becomes higher.

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-147340 (May 22, 2002)

An object of the present invention is to provide a lifting device for a rotor for a wind power generator which can lower the weight of the hub, increase the design flexibility of the rotor, and lift the rotor by using a single crane, and a method of installing the rotor using the lifting device.

The rotor lifting apparatus according to an embodiment of the present invention includes a plurality of grippers installed at the root of each of a plurality of blades coupled to a hub, a first connecting beam connecting two neighboring grippers of the plurality of grippers, A second connecting beam connecting the remaining grippers of the plurality of grippers to the first connecting beam, and a connecting portion for wire installation of the crane, and being movably installed on the second connecting beam along the longitudinal direction of the second connecting beam And a driving unit connected to the moving truck to move the moving truck.

Each of the plurality of grippers may include a first and a second part in the form of hooks that are coupled by a hinge axis and a fixed shaft coupled to an end of each of the first and second parts. Each of the plurality of grippers can form a buffer part on the inner surface in contact with the root part.

The first connection beam may be located in the circumferential outer side of the hub and may be a straight beam, and the second connection beam may be formed in an arc shape surrounding the front portion of the hub.

The moving truck may include a first moving truck having an engaging portion and a second moving truck having no engaging portion. The first and second moving bogies may be spaced apart along the longitudinal direction of the second connecting beam.

The first moving truck can move between the center of the second connecting beam and the end of the second connecting beam in contact with the first connecting beam and the second moving truck can move between the end of the second connecting beam and the first moving truck, .

Guide rails may be formed on both sides of the second linking beam, and the first and second moving lanes may be engaged with the guide rails to move along the guide rails.

The driving unit may include a first driving unit connected to the first and second moving bogie, and a second driving unit connected to any one of the second connecting beam and the gripper and the second moving bogie.

The first driving portion may include a cylinder hinged to the side of the second moving truck and a piston rod hinged to the side of the first moving truck. The second driving portion may include a cylinder hinged to either the second connecting beam and the gripper, and a piston rod hinged to the side of the second moving carriage.

A method of installing a rotor according to an embodiment of the present invention includes steps of assembling a rotor by installing a plurality of blades in a hub on the ground, installing a gripper on a root of each of the blades, Connecting a wire of the crane, lifting the rotor to a horizontal state using a crane, moving the center of gravity of the rotor by moving the moving carriage by driving the driving unit, setting the rotor to the nacelle .

The moving carriage can be positioned at the center of the second connecting beam before connecting the wire to the connecting portion of the moving carriage. In the step of erecting the rotor, the moving carriage may be gradually moved toward the first connecting beam such that one blade away from the first connecting beam of the plurality of blades faces downward.

According to the present embodiment, it is not necessary to provide a lifting point on the hub, so that the weight of the hub can be reduced and the design flexibility of the rotor can be enhanced. In addition, since a rotor can be installed using a single crane, the construction time can be shortened and the construction cost can be reduced.

1 is a schematic view showing a general wind turbine generator.
FIG. 2 is a perspective view showing a part of the rotor shown in FIG. 1 and a lifting device of the rotor according to the present embodiment.
3 is a flow chart illustrating a method of installing a rotor according to an embodiment of the present invention.
FIG. 4 is a perspective view of the rotor and lifting device showing the first through third steps of FIG. 3;
5 and 6 are perspective views of the rotor and the lifting device showing the fourth step shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

1 is a schematic view showing a general wind turbine generator.

1, the wind turbine generator 100 includes a tower 10 having a predetermined height set on the ground, a nacelle 20 installed on the top of the tower 10, a rotor (not shown) installed in front of the nacelle 20, 30). The rotor 30 includes a hub 31 and a plurality of blades 32 that are equally spaced along the circumferential direction of the hub 31 on the hub 31.

Inside the nacelle 20, a speed increasing gear coupled to the main shaft of the hub 31, a generator coupled with the speed increasing gear, and various control devices are provided. When the blade 32, the hub 31 and the main shaft are rotated at a low speed by the wind force, the speed increasing device increases the rotation speed of the main shaft at a high speed, and the power generator converts the mechanical energy resulting from the high speed rotation of the speed increasing device into electrical energy .

FIG. 2 is a perspective view showing a part of the rotor shown in FIG. 1 and a lifting device of the rotor according to the present embodiment.

2, the lifting device 200 of the rotor 30 includes a plurality of grippers 40 provided at the root portions 321 of each of the plurality of blades 32, A first connecting beam 51 connecting the two grippers 40 and a second connecting beam 52 connecting the first connecting beam 51 and the remaining gripper 40 and a second connecting beam 52 connecting the second connecting beam 51, And a driving unit 70. The driving unit 70 includes a moving carriage 60 and a driving unit 70. [

Each gripper 40 forms an inner diameter corresponding to the outer diameter of the root portion 321 of the blade 32 and is installed so as to surround the root portion 321. [ The gripper 40 has first and second parts 41 and 42 of a ring shape which are joined by a hinge shaft 45 and a fixing shaft 46 which is engaged with the ends of the first and second parts 41 and 42 ). The first and second parts 41 and 42 are adjusted in the angle of expansion about the hinge axis 45 in a state where the fixed shaft 46 is removed.

The first and second parts 41 and 42 are widely opened after the rotor 30 is assembled on the ground to position the gripper 40 outside the root part 321 and the first and second parts 41 and 42, The first and second parts 41 and 42 can be fixed with the fixing shaft 46 interposed after the gripper 40 is brought into close contact with the outside of the root part 321. [

At this time, a rubber or plastic cushioning portion 47 is located on the inner surface of the gripper 40 contacting the root portion 321, so that damage to the root portion 321 due to contact with the gripper 40 of the metal material can be suppressed . The gripper 40 of the above-described configuration is only one embodiment, and is applicable to any configuration that can be detachably fastened to the root portion 321 and fixed to the root portion 321. [

The rotor 30 and the lifting device 200 may have three blades 32 and three grippers 40, respectively. The first connecting beam 51 connects the two grippers 40 of the three grippers 40 and the second connecting beam 52 is connected to the remaining grippers 40, Connect one connecting beam (51).

The first connecting beam 51 is located at a predetermined distance from the hub 31 on the circumferential outer side of the hub 31. The first connecting beam 51 may be a straight beam and both ends of the first connecting beam 51 may be fixed to the hinge shaft 45 mounting portion of each of the two grippers 40. [ The first connecting beam 51 is positioned approximately parallel to the ground after the rotor 30 is vertically erected.

The second connection beam 52 is formed in an arc shape unlike the first connection beam 51 having a straight line shape. The second connection beam 52 surrounds the front portion of the streamlined hub 31 and is formed in an arc shape having a predetermined curvature so as not to be in contact with the hub 31. One end of the second connection beam 52 may be fixed to the center of the first connection beam 51 and the other end of the second connection beam 52 may be fixed to the mounting site of the hinge shaft 45 of the remaining gripper 40.

Whereby the three grippers 40 are integrally formed by the first connecting beam 51 located on the circumferential outer side of the hub 31 and the second connecting beam 52 surrounding the front portion of the hub 31 in the form of an arc .

The moving bogie 60 is provided with a coupling portion 61 for wire installation of the crane and is movably installed along the longitudinal direction of the second connection beam 52 on the second connection beam 52. The engaging portion 61 may be composed of a ring or the like which hooks the hook fixed to the end portion of the wire. The driving unit 70 is connected to the second connecting beam 52 and the moving carriage 60 to move the moving carriage 60 on the second connecting beam 52.

The moving truck 60 may be composed of a first moving truck 62 having an engaging portion 61 and a second moving truck 63 having no engaging portion 61. [ The first and second moving bogies 62 and 63 are located at a predetermined distance along the longitudinal direction of the second connecting beam 52 and the first moving bogie 62 is located at a position 1 < / RTI >

The first moving truck 62 moves between the center of the second connecting beam 52 and the end of the second connecting beam 52 which is in contact with the first connecting beam 51 in the process of installing the rotor 30. The second moving truck 63 moves between the first moving truck 62 and the end of the second connecting beam 52 in contact with the gripper 40.

Guide rails 53 may be installed on both sides of the second connecting beams 52 and the first and second moving trucks 62 and 63 may be engaged with the guide rails 53 to move along the guide rails 53 . Although the concave guide rail 53 is shown in FIG. 2 as an example, the shape of the guide rail 53 is not limited to the illustrated example.

The driving unit 70 includes a first driving unit 71 connected to the first and second moving bogie 62 and 63 and a second driving unit 71 connected to the second connecting beam 52 or the gripper 40 and the second moving bogie 63. [ And a second driving unit 72 installed therein. Each of the first and second driving portions 71 and 72 may be constituted by a hydraulic cylinder.

The first driving portion 71 may be composed of a cylinder 711 hinged to the side of the second moving truck 63 and a piston rod 712 hinged to the side of the first moving truck 62. The second driving part 72 is constituted by a cylinder 721 hinged to the second connecting beam 52 or the gripper 40 and a piston rod 722 hinged to the side of the second moving carriage 63 .

As both ends of the first and second driving portions 71 and 72 are hinged to the first and second moving bogies 62 and 63 and the second connecting beam 52, the first and second moving bogies 62, 63) can smoothly move along the circular trajectory.

The relative distance of the first and second moving carts 62 and 63 to the end of the second connecting beam 52 in contact with the gripper 40 can be adjusted by the operation of the second driving unit 72. The relative distance of the first moving carriage 62 to the second moving carriage 63 can be adjusted by the operation of the first driving unit 71. That is, the first moving carriage 62 having the engaging portion 61 is adjusted in two steps according to the operation of the first driving portion 71 and the second driving portion 72.

The driving unit 70 is not limited to the hydraulic cylinder type described above and can be applied to any mechanical structure that can move the first moving carriage 62 along the longitudinal direction of the second connecting beam 52.

2 shows a case in which two moving bogies 60 and two driving bogies 70 are respectively provided. However, one driving unit 70 can move the second connecting beam 52 and the first moving bogie 62 as shown in Fig. In this case, when the first moving truck 62 moves to the end of the second connecting beam 52 in contact with the first connecting beam 51, the second connecting beam 51 is moved so that the driving unit 70 does not contact the hub 31 52 and the hub 31 must be secured sufficiently.

When two moving trucks 62 and 63 and two driving units 71 and 72 are installed on the second connecting beam 52, the first and second driving units 71 and 72 are operated in the second connecting It is not necessary to secure a large distance between the second connection beam 52 and the hub 31 since it does not deviate greatly from the beam 52. The center of gravity of the rotor 30 may be moved in accordance with the movement of the first moving truck 62 to rotate the rotor 30 during the installation of the rotor 30. [

3 is a flow chart illustrating a method of installing a rotor according to an embodiment of the present invention.

Referring to FIG. 3, a method of installing a rotor includes a first step (S10) of assembling a rotor on the ground, a second step (S20) of connecting a wire of a crane to a lifting device after installing a lifting device on the rotor, A third step (S30) of lifting the rotor in a horizontal state using a crane, a fourth step (S40) of operating the drive unit to raise the rotor vertically, and a fifth step (S50) of installing the rotor in the nacelle .

FIG. 4 is a perspective view of the rotor and lifting device showing the first through third steps of FIG. 3;

Referring to FIG. 4, the hub 31 is disposed such that the front portion of the hub 31 faces upward on a mount (not shown) provided on the ground in the first step S10. A plurality of blades 32 are installed along the circumferential direction of the hub 31 to assemble the rotor 30. At this time, the plurality of blades 32 are positioned substantially in parallel with the ground.

The lifting device 200 is installed in the rotor 30 in the second step S20. The gripper 40 is fixed to the root portion 321 of each of the plurality of blades 32 and the wire 80 of the crane is connected to the engaging portion 61 of the first moving truck 62. At this time, the first moving truck 62 is located at the center of the second connecting beam 52.

In the third step S30, the crane is operated to lift the rotor 30 in a horizontal state. At this time, since the engaging portion 61 of the first moving truck 62 is located at the center of gravity of the rotor 30, the rotor 30 can be lifted up without being inclined. The rotor 30 is lifted up to a height at which the blade 32 does not touch the ground even if the rotor 30 is vertically erected.

5 and 6 are perspective views of the rotor and the lifting device showing the fourth step shown in Fig.

5 and 6, the first and second driving units 71 and 72 are operated to move the first moving truck 62 toward the first connecting beam 51 in a fourth step S40. First the piston rods 712 and 722 of the first and second driving portions 71 and 72 are extended to move the first and second moving bogies 62 and 63 toward the first connecting beam 51 ).

The center of gravity of the rotor 30 moves as the first moving truck 62 moves away from the center of the second connecting beam 52 and the blade 32 distant from the first connecting beam 51 moves downward The rotor 30 starts to be erected.

The piston rod 712 and 722 of the first and second driving portions 71 and 72 are extended to the maximum so that the first moving bogie 62 of the second connecting beam 52 contacting the first connecting beam 51 (Fig. 6). Then, the rotor 30 is raised as the blades 32 far from the first connecting beam 51 are raised substantially perpendicularly to the ground.

The erected rotor 30 is then installed in a nacelle (not shown) to complete the installation of the rotor 30. Then, the gripper 40 is separated from the blade 32 to release the assembly of the rotor 30 and the lifting device 200, and the lifting device 200 is lowered to the ground using a crane.

According to the above-described method of installing the rotor 30, it is not necessary to provide a lifting point on the hub 31, so that the weight of the hub 31 can be reduced, and the design flexibility of the rotor 30 can be enhanced. In addition, since the rotor 30 can be installed using a single crane, the construction time can be shortened and the construction cost can be reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

30: rotor 31: hub
32: blade 321: root portion
200: lifting device 40: gripper
51: first connecting beam 52: second connecting beam
62: first moving truck 63: second moving truck
71: first driving part 72: second driving part

Claims (12)

A plurality of grippers installed in a root portion of each of the plurality of blades coupled to the hub;
A first connection beam connecting two neighboring grippers of the plurality of grippers;
A second connection beam connecting the remaining one of the plurality of grippers with the first connection beam;
A moving carriage having a coupling portion for wire installation of the crane and movably installed on the second coupling beam along the longitudinal direction of the second coupling beam; And
And a driving unit connected to the moving truck to move the moving truck. The method according to claim 1,
Wherein each of the plurality of grippers comprises:
A first and a second part of a ring-shaped shape coupled by a hinge axis; And
And a stationary shaft coupled to an end of each of the first and second parts. The method according to claim 1,
Each of said plurality of grippers forming a cushion on an inner surface in contact with the root portion. The method according to claim 1,
Wherein the first connecting beam is located outside the circumference of the hub and is comprised of a straight beam,
And the second connection beam is formed in an arc shape surrounding the front portion of the hub. 5. The method of claim 4,
The moving bogie,
A first moving truck having the engaging portion; And
And a second moving truck which does not have the engaging portion,
Wherein the first and second moving bogie are spaced apart along the longitudinal direction of the second connecting beam. 6. The method of claim 5,
The first moving carriage moving between a center of the second connecting beam and an end of the second connecting beam in contact with the first connecting beam,
Wherein the second moving bogie moves between the first moving bogie and the end of the second connecting beam in contact with the gripper. 6. The method of claim 5,
Guide rails are formed on both sides of the second connection beam,
Wherein the first and second moving carts engage with the guide rails and move along the guide rails. 6. The method of claim 5,
The driving unit includes:
A first driving unit connected to the first and second moving bogies; And
And a second driving unit connected to any one of the second connection beam and the gripper and the second moving carriage. 9. The method of claim 8,
Wherein the first driving portion includes a cylinder hinged to a side of the second moving truck and a piston rod hinged to a side of the first moving truck,
Wherein the second driving portion includes a cylinder hinged to either the second connecting beam and the gripper, and a piston rod hinged to a side of the second moving truck. A method of installing a rotor using the lifting device according to claim 1,
Assembling the rotor by installing a plurality of blades on the hub at the ground;
Attaching the gripper to a root portion of each of the plurality of blades, and connecting a wire of a crane to an engaging portion of the moving truck;
Lifting the rotor to a horizontal state using the crane;
Moving the center of gravity of the rotor by moving the moving truck by operating the driving unit; And
And installing the erected rotor in a nacelle. delete 11. The method of claim 10,
Wherein the step of raising the rotor gradually moves the moving bobbins toward the first connecting beam such that one of the plurality of blades is away from the first connecting beam.

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