Wind turbine generator assembly method, assembly system, and wind turbine generator disassembly method

Abstract

To provide a method for assembling a wind power generator that can reduce the ground area required for constructing the wind power generator and improve workability. [Solution] The method includes a nacelle installation step in which a nacelle (102) is suspended from a portal frame (30) and raised to the tip of the tower (101) by a lift-up device (20), and the portal frame (30) is moved horizontally to connect the nacelle (102) to the tower (101); a hub installation step in which a hub (103) is suspended from the portal frame (30) and raised to the tip of the tower (101) by a lift-up device (20), and the portal frame (30) is moved horizontally to connect the hub (103) to the nacelle (102); and a blade installation step in which a plurality of blades (104A to 104C) are suspended one by one from a blade transport device (40) and raised to the tip of the tower (101) by the lift-up device (20), and the blade transport device (40) is moved horizontally to connect each blade to the hub (103).

Description

[Technical Field]

[0001] The present disclosure relates to a method for assembling a wind turbine generator, an assembly system, and a method for disassembling a wind turbine generator. [Background technology]

[0002] In recent years, wind power generation has been attracting attention as one of the power generation businesses that utilize renewable energy, and there is a need to increase the size of wind power generators in order to improve power generation efficiency.

[0003] Traditionally, cranes have been used to construct wind turbines, and when assembling the wind turbine tower or installing the nacelle, hub, etc. at the top of the tower, each part is suspended by the crane and lifted to the installation location (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-145714 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional wind turbine assembly methods, as wind turbines become larger, the cranes used for construction also need to become larger. As the size of the cranes increases, the area required for installation also increases, resulting in a problem of an increase in the ground area required for construction. Furthermore, as wind turbines and cranes become larger, construction becomes more difficult in strong winds.

[0006] The present disclosure aims to provide a method and system for assembling a wind turbine generator, and a method for dismantling a wind turbine generator, which can reduce the ground area required for constructing the wind turbine generator and improve construction efficiency. [Means for solving the problem]

[0007] A method of assembling a wind power generator according to one aspect of an embodiment of the present invention includes: a support column installed around a tower of the wind power generator; a lifting device installed on the support column and moving up and down along the support column; a portal frame installed on the lifting device and moving in a first horizontal direction to approach and move away from the tower; and a portal frame installed on the lifting device and suspending each of the plurality of blades of the wind power generator individually, and moving each suspended blade in the first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, and and a blade transport device that rotates the hub of the wind power generator around a rotation axis parallel to the central axis of the blade, the method including the steps of: suspending a nacelle of the wind power generator on the portal frame and raising it to the tip of the tower by the lifting device; horizontally moving the portal frame to move the nacelle to just above the tip; and connecting the nacelle to the tower; and suspending a hub of the wind power generator on the portal frame and raising it to the tip of the tower by the lifting device. a hub installation step of horizontally moving the portal frame to move the hub to a position opposite the nacelle and connect the hub to the nacelle; a nacelle rotation step of rotating the nacelle around the central axis of the tower so that the connection portions of the hub with the multiple blades of the wind power generator are positioned opposite the base ends of the blades; a replacement step of replacing the portal frame installed on the lifting device with the blade transport device; and a blade installation step of suspending one of the multiple blades of the wind power generator on the blade transport device and lifting it to the tip of the tower by the lifting device, horizontally moving the one blade suspended from the blade transport device in the first horizontal direction and the second horizontal direction and rotating it around the rotation axis to move the one blade to a position opposite the hub and connect the one blade to the hub, and similarly connecting the remaining multiple blades one by one to the hub using the lifting device and the blade transport device.

[0008] Similarly, an assembly system for a wind power generator according to an aspect of an embodiment of the present invention includes a support pillar installed around a tower of the wind power generator, a lifting device installed on the support pillar and moving up and down along the support pillar to lift a nacelle, a hub, and each of a plurality of blades of the wind power generator individually to the tip of the tower, a portal frame installed on the lifting device and movable in a first horizontal direction moving toward and away from the tower, capable of suspending each of the nacelle and the hub individually, and horizontally moving the nacelle and the hub lifted by the lifting device individually to connection parts with other components of the wind power generator, and a frame installed on the lifting device in place of the portal frame, capable of suspending each of the plurality of blades individually, and lifting one of the blades. and a blade transport device that is movable in the first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction and that is rotatable about a rotation axis parallel to the central axis of the tower, and that moves the single blade lifted by the lifting device to a connection portion with a hub, and after the nacelle is connected to the tower, the hub is connected to the nacelle, and the nacelle is rotated about the central axis of the tower so that the connection portions of the hub with the multiple blades are positioned opposite to the base ends of the blades, the blade transport device moves one of the multiple blades to a position opposite to the hub and connects the one blade to the hub, and similarly connects the remaining multiple blades one by one to the hub using the lifting device and the blade transport device. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to provide a method for assembling a wind turbine generator, an assembly system, and a method for dismantling a wind turbine generator that can reduce the ground area required for constructing the wind turbine generator and improve construction ease. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a wind power generator according to an embodiment; [Figure 2]FIG. 1 is a diagram showing a schematic configuration of an assembly system for a wind power generator according to an embodiment; [Figure 3] Side view of the lift-up device [Figure 4] Plan view of the lift-up device [Figure 5] Front view of the portal frame [Figure 6] Side view of the portal frame [Figure 7] Side view of the blade transport device [Figure 8] Plan view of the blade transport device [Figure 9] Front view of the blade transport device as seen from the X-negative side [Figure 10] FIG. 10 is a front view of the blade transport device, limited to the base and the first blade attitude adjustment unit, when viewed from the X-positive side. [Figure 11] Side view showing the first stage of the wind turbine assembly procedure [Figure 12] Side view showing the second stage of the wind turbine assembly procedure [Figure 13] Side view showing the third stage of the wind turbine assembly procedure [Figure 14] Side view showing the fourth stage of the wind turbine assembly procedure [Figure 15] Side view showing the fifth stage of the wind turbine assembly procedure [Figure 16] Side view showing the sixth stage of the wind turbine assembly procedure [Figure 17] Side view showing the seventh stage of the wind turbine assembly procedure [Figure 18] Plan view of the seventh stage shown in Figure 17 [Figure 19] Side view showing the eighth stage of the wind turbine assembly procedure [Figure 20] Plan view of the eighth stage shown in Figure 19 [Figure 21] Diagram showing the first step in the eighth step of connecting the blade to the hub [Figure 22] Figure 8 shows the second step in the process of connecting the blade to the hub. [Figure 23] Figure 3 shows the third step in the eighth step of connecting the blade to the hub. [Figure 24] Side view showing the ninth stage of the wind turbine assembly procedure [Figure 25] Side view showing the 10th step in the wind turbine assembly process [Figure 26] Side view showing step 11 of the wind turbine assembly procedure [Figure 27] Side view showing step 12 of the wind turbine assembly procedure [Figure 28] Side view showing the 13th stage of the wind turbine assembly procedure DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components in the drawings will be denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted.

[0012] In the following description, the X, Y, and Z directions are perpendicular to one another. The X and Y directions are horizontal, and the Z direction is vertical. The X direction is the movement direction of the portal frame 30, with the X positive side being the direction toward the support column 10 and the X negative side being the direction away. The Y direction is the opposing direction of the pair of climbing beams 23, 24 of the lift-up device 20, with the Y positive side being the side of one climbing beam 23 and the Y negative side being the side of the other climbing beam 24. For ease of explanation, the Z positive side may also be referred to as the upper side and the Z negative side as the lower side.

[0013] <Outline of wind turbine generator configuration> Fig. 1 is a diagram showing a schematic configuration of a wind power generator 100 according to an embodiment. As shown in Fig. 1, the wind power generator 100 includes a tower 101, a nacelle 102, a hub 103, and a plurality of blades 104A to 104C.

[0014] The tower 101 is placed on a foundation and stands upright. The tower 101 is, for example, cylindrical. For ease of construction, the tower 101 is divided into multiple components along the Z direction and assembled from the bottom up at the construction site. In the example of FIG. 1, the tower 101 is composed of five components, from bottom to top: a bottom tower 101A, a second tower 101B, a third tower 101C, a fourth tower 101D, and a top tower 101E. However, the number of components is not limited to this. Note that in FIG. 1, a dashed line is drawn horizontally above the bottom end of the bottom tower 101A, and this dashed line represents the ground surface at the construction site. The same applies to FIG. 11 and subsequent figures.

[0015] The nacelle 102 is attached to the upper end of the tower 101. The nacelle 102 is installed so as to be rotatable around the central axis C1 of the tower, for example.

[0016] The hub 103 is attached to one end (the end on the X negative side in FIG. 1) of the nacelle 102. The hub 103 is installed to be rotatable relative to the nacelle 102 about a rotation axis C2 along the longitudinal direction of the nacelle 102.

[0017] The blades 104A to 104C are elongated members extending radially outward relative to the rotation axis C2 of the hub 103, with their respective base ends connected to three connecting portions 103A to 103C of the hub 103. The blades 104A to 104C are preferably arranged at approximately equal intervals in the circumferential direction around the rotation axis C2. The example of FIG. 1 has three blades: a first blade 104A, a second blade 104B, and a third blade 104C, and the blades 104A to 104C are arranged at intervals of approximately 120 degrees around the rotation axis C2. Similarly, the connecting portions 103A, 103B, and 103C of the hub 103 to which the blades 104A, 104B, and 104C are connected are also arranged at intervals of approximately 120 degrees around the rotation axis C2.

[0018] In the wind power generator 100, the hub 103 and the blades 104A to 104C rotate together as a rotor, and the rotation of the rotor is received by the nacelle 102 to generate electricity.

[0019] <Outline of wind turbine assembly system 1> The configuration of a wind power generator assembly system 1 according to this embodiment will be described with reference to Figures 2 to 10. Figure 2 is a diagram showing a schematic configuration of a wind power generator assembly system 1 according to this embodiment. The wind power generator assembly system 1 shown in Figure 2 (hereinafter may also be simply referred to as "assembly system 1") is a system for assembling the wind power generator 100 shown in Figure 1.

[0020] 2, the assembly system 1 includes a support 10, a lift-up device 20 (elevating device), and a portal frame 30. Furthermore, the assembly system 1 includes a blade transport device 40, as will be described later with reference to FIGS. 7 to 10, 18, 20, etc.

[0021] The support 10 is installed around the tower 101 of the wind power generator 100. The support 10 has four pillars 11, 12, 13, and 14 erected around the tower 101, and a plurality of beams 15 connecting adjacent pillars. The support 10 is installed around the central axis C1 of the tower 101 in a quadrilateral shape, with the pillars 11, 12, 13, and 14 forming the corners and the beams 15 forming the sides. As shown in FIG. 2, for example, the beams 15 each extend horizontally, and a plurality of beams 15 are arranged at approximately equal intervals along the Z direction.

[0022] The lift-up device 20 is installed on the support 10 and moves up and down along the support 10 in the vertical direction indicated by arrow A in Fig. 2. The lift-up device 20 individually lifts the nacelle 102, hub 103, and each of the plurality of blades (first blade 104A, second blade 104B, third blade 104C) of the wind power generator 100 to the tip of the tower 101.

[0023] The lift-up device 20 has a pair of climbing beams 23, 24 and a pair of measuring devices 21, 22. The pair of climbing beams 23, 24 are arranged to extend horizontally along a pair of opposite sides of the rectangular shape of the support 10, and a portal frame 30 is movably installed on them. The pair of measuring devices 21, 22 are connected to two of the four pillars of the support 10 (the two pillars 11, 12 arranged on the X-negative side in the example of FIG. 2), and are devices that can move up and down along the two pillars 11, 12. The measuring devices 21, 22 are, for example, hydraulic cylinders, and jack up the climbing beams 23, 24 connected to the upper parts thereof.

[0024] The portal frame 30 is installed on the lift-up device 20, and moves in a horizontal direction (first horizontal direction, X direction) toward and away from the tower 101, as indicated by arrow B in Fig. 2. The portal frame 30 can individually suspend the nacelle 102 and hub 103 of the wind power generator 100, and moves the nacelle 102 and hub 103, which have been raised by the lift-up device 20, horizontally to their respective connections with other components of the wind power generator 100.

[0025] The portal frame 30 has a pair of pillars 33, 34 extending upward from the pair of climbing beams 23, 24 of the lift-up device 20, respectively, and a beam 35 connecting the upper ends of the pair of pillars 33, 34. In addition, a suspension device 38 is provided in the center of the beam 35 for suspending each component of the wind power generator 100 from the portal frame 30. The suspension device 38 can suspend the component via a wire 39 (see FIG. 5, etc.) and hold it at a predetermined height relative to the portal frame 30.

[0026] 2, the blade transport device 40 according to this embodiment can be installed on the lift-up device 20 in place of the portal frame 30. The blade transport device 40 can individually suspend the first blade 104A, the second blade 104B, and the third blade 104C of the wind power generator 100, and can horizontally and rotationally move the first blade 104A, the second blade 104B, and the third blade 104C raised by the lift-up device 20 individually to the connection part with the hub 103 already installed on the wind power generator 100. Details of the blade transport device 40 will be described later.

[0027] Fig. 3 is a side view of the lift-up device 20. Fig. 4 is a plan view of the lift-up device 20. As shown in Figs. 3 and 4, the climbing beams 23 and 24 of the lift-up device 20 are composed of two members, first beams 23A and 24A and second beams 23B and 24B, respectively.

[0028] The base ends (X-positive direction sides) of first beams 23A and 24A are connected to measuring devices 21 and 22, respectively, and the tip ends (X-negative direction sides) extend away from support 10. The base ends of first beams 23A and 24A are fixed to the upper ends of measuring devices 21 and 22. As shown in FIG. 3, bundles 26 are provided at the lower ends of the tip ends of first beams 23A and 24A, respectively, to connect them to the lower parts of measuring devices 21 and 22.

[0029] The second beams 23B, 24B are selectively connected to the base end or tip end of the first beams 23A, 24A and are connected so as to extend in the same direction as the first beams 23A, 24A. When the nacelle 102 and the hub 103 are attached, the second beams 23B, 24B are connected to the base end sides of the first beams 23A, 24A. This state is shown by solid lines in Figures 3 and 4. When the second beams 23B, 24B are connected to the base end sides of the first beams 23A, 24A, as shown in Figure 3, a bundle 26 is provided at the lower part of the tip side (positive X direction side) of the second beams 23B, 24B, which connects to the lower part of the measuring devices 21, 22, respectively.

[0030] In particular, in this embodiment, when attaching the blades 104A to 104C, the second beams 23B and 24B are detached from the base ends of the first beams 23A and 24A and reconnected to the tip ends of the first beams 23A and 24A, as shown by the dotted lines in Fig. 4. This causes the climbing beams 23 and 24 to extend in the direction away from the support 10 (the negative X direction).

[0031] The pair of climbing beams 23, 24 are connected by a tie beam 25 extending in the Y direction. As shown in Fig. 4, for example, one tie beam 25 can be installed at the base end and one at the tip end of each of the first beams 23A, 24A, and one at the tip end of each of the second beams 23B, 24B. Note that the arrangement and number of tie beams 25 are not limited to the example shown in Fig. 4.

[0032] 4, a plurality of support mechanisms 16 are provided between each of the pillars 11-14 of the support 10 of the assembly system 1 and the tower 101 of the wind power generator 100. The tower 101 is supported on the support 10 via each support mechanism 16. The support mechanisms 16 are configured as a group of four, for example, installed at the same height position on each of the pillars 11-14, and each group can support the tower 101 from four directions at the same height of the support 10. Each group of support mechanisms 16 is provided on the support 10, spaced apart in the vertical direction. The support mechanisms 16 are, for example, hydraulic actuators that can expand and contract in one direction connecting each of the pillars 11-14 and the center C1 of the tower 101, and each group can support the tower 101 by pressing the outer circumferential surface of the tower 101 from each of the pillars 11-14.

[0033] Fig. 5 is a front view of the portal frame 30. Fig. 6 is a side view of the portal frame 30.

[0034] 5 and 6, the portal frame 30 has a pair of movable bases 31 and 32. The movable bases 31 and 32 each have a plurality of wheels 31A and 32A, and are installed so that they can move on the climbing beams 23 and 24, respectively, using the wheels 31A and 32A. The wheels 31A and 32A can be rotated by applying a driving force from a driving source such as a motor installed in the movable bases 31 and 32.

[0035] In order to stabilize the movement direction of the wheels 31A, 32A of the portal frame 30 in the X direction, guide members such as rails for guiding the wheels 31A, 32A may be installed on the upper surfaces of the climbing beams 23, 24. Furthermore, the moving bases 31, 32 only need to be able to move the portal frame 30 in the X direction, and elements other than the wheels 31A, 32A, such as bearings, may also be used.

[0036] A pair of pillars 33 and 34 of the portal frame 30 are installed so as to extend upward from the movable bases 31 and 32, respectively.

[0037] A suspension device 38 is installed at approximately the center of the beam 35. The suspension device 38 can suspend components such as the blocks 101A to 101E of the tower 101, the nacelle 102, and the hub 103 via wires 39 or the like. The suspension device 38 may be configured to have a function of adjusting the length of the wires 39 interposed between the beam 35 and each component, for example, by using a winch or the like. This allows the Z-direction position of each component of the wind power generator 100 suspended from the portal frame 30 to be adjusted as desired, thereby improving positioning accuracy when connecting components and improving work efficiency.

[0038] The beam 35 connecting the pair of pillars 33, 34 may have a configuration including a slide mechanism that can move the position at which each component of the wind power generator 100 is suspended along the extension direction (Y direction) of the beam 35. By providing such a slide mechanism, the position in the Y direction of each component of the wind power generator 100 suspended from the portal frame 30 can be adjusted as desired, thereby improving the positioning accuracy when connecting to other components and improving work efficiency. Furthermore, by using this slide mechanism in combination with the Z-direction wire adjustment mechanism of the suspension device 38, the position in two directions, the Z direction and the Y direction, of each component of the wind power generator 100 suspended from the portal frame 30 can be adjusted as desired, further improving the positioning accuracy when connecting to other components and further improving work efficiency.

[0039] As shown in Figures 2, 5, etc., the portal frame 30 has a fall prevention device 36 that connects the pair of moving bases 31, 32. The fall prevention device 36 is, for example, a beam-shaped member extending in a substantially horizontal direction. By providing the portal frame 30 with the fall prevention device 36 in this way, it is possible to further prevent the pair of pillars 33, 34 from falling. The fall prevention device 36 only needs to be located below the lower ends of each element of the wind power generator 100 suspended by the portal frame 30, and may be configured to connect the pair of pillars 33, 34. The fall prevention device 36 may be permanently installed, or may be configured to be installed as needed depending on the weight of the transported object, etc.

[0040] <Configuration of the blade transport device> The configuration of the blade transport device 40 will be described with reference to Figures 7 to 10. Figure 7 is a side view of the blade transport device 40. Figure 8 is a plan view of the blade transport device 40. Figure 9 is a front view of the blade transport device 40 as viewed from the X negative side. Figure 10 is a front view of the blade transport device 40 limited to the base part 70 and the first blade attitude adjustment part 80 as viewed from the X positive side.

[0041] After the installation work of the nacelle 102 and the hub 103 has been completed using the portal frame 30, the blade transport device 40 is installed on the lift-up device 20, replacing the portal frame 30.

[0042] The blade transport device 40 can individually suspend each of the multiple blades 104A-104C of the wind power generator 100 and can move one of the multiple blades 104A-104C in a horizontal direction (first horizontal direction, X direction) toward or away from the tower 101, as indicated by arrow B in FIGS. 7 and 8 (the same arrow as in FIG. 2). The blade transport device 40 can also move the suspended blade in a second horizontal direction (Y direction) perpendicular to the first horizontal direction, as indicated by arrow D in FIGS. 8 and 9. Furthermore, the blade transport device 40 can rotate the suspended blade around a rotation axis 66 having an axis C4 parallel to the central axis C1 of the tower 101, as indicated by arrow E in FIG. 8. Using these movement and rotation functions, the blade transport device 40 can move a single blade raised by the lift-up device 20 to the connection portion with the hub 103.

[0043] As shown in FIGS. 7 to 9, the blade transport device 40 has a pair of moving bases 31 and 32, a base portion 50, an intermediate portion 60, and a pedestal portion .

[0044] The pair of moving bases 31, 32 have the same configuration as that of the portal frame 30. That is, the pair of moving bases 31, 32 are movable in the first horizontal direction (X direction) along the pair of climbing beams 23, 24, respectively, and extend in the first horizontal direction.

[0045] As shown in Figures 7 and 8, the base 50 is a member that is fixed to the pair of movable bases 31, 32 at the end position of the pair of movable bases 31, 32 in the direction away from the tower 101 (negative X direction), and that spans between the pair of movable bases 31, 32 along the second horizontal direction (negative Y direction) as shown in Figure 8.

[0046] In other words, in this embodiment, a pair of moving bases 31, 32 and the base 50 fixed thereto function as a "first horizontal moving part" that moves the blade 104 suspended from the blade conveying device 40 in the first horizontal direction (X direction).

[0047] As shown in Figures 7 to 9, the intermediate part 60 is a member that is installed above the base part 50 (positive Z direction) so as to be movable relative to the base part 50 in the second horizontal direction (Y direction), and on which a rotation shaft 66 is installed.

[0048] 7 to 10, the base 50 has a pair of flat surfaces 51, 52 facing each other in the X direction above the pair of moving bases 31, 32. Each of the pair of flat surfaces 51, 52 is parallel to the YZ plane. Guide rails 61, 62 are provided on each of the flat surfaces 51, 52 of the base 50. Each of the guide rails 61, 62 extends in the Y direction. The base 50 also has an upper surface 53 that connects the upper ends of the pair of flat surfaces 51, 52 and is parallel to the XY plane.

[0049] On the other hand, the intermediate portion 60 has a flat plate portion 63 that is substantially rectangular in plan view. The above-mentioned rotation shaft 66 is provided on the flat plate portion 63, and is erected so that the axis C4 extends in the Z direction.

[0050] Furthermore, multiple legs 64 extend downward from the underside of the flat plate portion 63, and a roller 65 is attached to the tip of each leg 64 so as to be rotatable around the Y axis. The multiple rollers 65 include a first group of rollers 65A whose tips face the X positive direction and a second group of rollers 65B whose tips face the X negative direction. The first group of rollers 65A is rotatably connected to one guide rail 61 located on the X negative direction side. The second group of rollers 65B is rotatably connected to the other guide rail 62 located on the X positive direction side. Furthermore, the dimensions of each leg 64 in the Z direction are formed to be approximately the same. With this configuration, the flat plate portion 63 of the intermediate portion 60 is located at an upper position that is approximately equidistant from the upper surface 53 of the base 50.

[0051] As described above, the pair of guide rails 61, 62 to which the first roller group 65A and the second roller group 65B of the intermediate portion 60 are attached are fixed to the base portion 50. Therefore, the position of the flat plate portion 63 of the intermediate portion 60 in the X direction does not change even when the first roller group 65A and the second roller group 65B move along the guide rails 61, 62.

[0052] In other words, in this embodiment, the first roller group 65A, the second roller group 65B of the intermediate portion 60, and the pair of guide rails 61, 62 of the base portion 50 function as a "second horizontal direction moving portion" that moves the blade 104 suspended from the blade conveying device 40 in the second horizontal direction (Y direction).

[0053] 8 and 9, in this embodiment, the first roller group 65A and the second roller group 65B each have two rollers, but the number of rollers is not limited to this. For example, each may have three or more rollers, or the number of rollers may be different between the first roller group 65A and the second roller group 65B.

[0054] As shown in Figures 7 to 9, the base portion 70 is installed above the intermediate portion 60 and is rotatable around the rotation axis 66 relative to the base portion 50 and the intermediate portion 60, and is a member whose longitudinal dimension is longer than the dimension of the pair of moving bases 31, 32 along the first horizontal direction (X direction), extending from the rotation axis 66 toward the tower 101.

[0055] 7 to 10, one of the blades 104A to 104C suspended from the blade transport device 40 is shown by a dotted line and is designated by the reference numeral 104 as an example. Also, in FIGS. 7 to 10, the base 70 is illustrated as a plate having a substantially longitudinal shape with a pair of long sides and a pair of short sides in a plan view. As shown in FIG. 8, the base 70 suspends the blade 104 from the base 70 such that the longitudinal direction C3 (shown by a dotted line in the figure) of the blade 104 is aligned with the longitudinal direction C5 (shown by a dashed-dotted line in the figure) of the base 70. In the example of FIGS. 7 to 10, the long side of the base 70 is arranged parallel to the X direction, and therefore the longitudinal direction of the blade 104 suspended from the base 70 is also arranged parallel to the X direction.

[0056] In this state, when the base portion 70 is rotated around the rotation axis 66, the base portion 70 can be rotated around the axis C4 while maintaining the longitudinal direction C3 of the blade 104 aligned with the longitudinal direction C5 of the base portion 70.

[0057] That is, in this embodiment, the rotation shaft 66 of the intermediate portion 60 and the base portion 70 function as a "rotation portion" that rotates the blade 104 suspended from the blade transport device 40 around the rotation axis C4.

[0058] In this way, the blade transport device 40 according to this embodiment can arbitrarily move the suspended blade 104 in the X direction (first horizontal direction) and the Y direction (second horizontal direction), and can also arbitrarily rotate the blade 104 around the axis C4 of the rotation shaft 66. This improves the positioning accuracy of the blade 104, and makes it easy to move the blade 104 to the connection part with the hub 103.

[0059] The blade transport device 40 also includes a first blade attitude adjustment unit 80 and a second blade attitude adjustment unit 90.

[0060] The first blade attitude adjustment unit 80 is disposed at the longitudinal tip of the base 70 on the opposite side from the rotation axis C4 (i.e., the tip on the X positive side). The first blade attitude adjustment unit 80 suspends the blade 104 and adjusts the rotation angle θ11 of the blade 104 about the longitudinal direction C3 and the tilt angle θ12 of the base 70 with respect to the longitudinal direction C5.

[0061] 10, the first blade attitude adjustment unit 80 winds a wire or other such line material 81 around the circumferential direction of the base side of the blade 104, and connects both ends of the line material 81 to hoisting devices 82, 83 such as winches. The hoisting devices 82, 83 are disposed on both sides of the base 70 in the short direction. The tensions F1, F2 output by the hoisting devices 82, 83 are transmitted to the blade 104 via the wire material 81, thereby adjusting the rotation angle θ11 and the tilt angle θ12.

[0062] The second blade attitude adjustment unit 90 is disposed at the base end of the base 70 near the rotation axis C4. The second blade attitude adjustment unit 90 suspends the blade 104 and adjusts the rotation angle θ21 of the blade 104 around the longitudinal direction C3 and the tilt angle θ22 of the base 70 with respect to the longitudinal direction C5.

[0063] 9, due to the positional relationship in the X direction, the second blade attitude adjustment unit 90 supports the portion where the wing portions extending radially from the axis C3 are provided, rather than the cylindrical portion on the base end side of the blade 104. In other words, the dimension of the blade 104 supported by the second blade attitude adjustment unit 90 in the short direction of the base portion 70 (the Y direction in FIG. 9) is longer than that of the first blade attitude adjustment unit 80 shown in FIG.

[0064] For this reason, in the second blade attitude adjustment unit 90, as shown in Fig. 9, for example, the blade 104 is placed on a flat receiving base 91 with a cushion material 92 sandwiched between them. Furthermore, one end of a pair of wires 93, 94 such as wires is connected to both sides of the receiving base 91 in the short direction of the base unit 70, and the other end is connected to hoisting devices 95, 96 such as winches. Each hoisting device 95, 96 is disposed on both sides of the short direction of the base unit 70. Then, tensions F3, F4 output by each hoisting device 95, 96 are transmitted to the blade 104 via the wires 93, 94, the receiving base 91, and the cushion material 92, thereby adjusting the rotation angle θ21 and the tilt angle θ22.

[0065] The second blade attitude adjustment unit 90 has a swing suppression unit 97. The swing suppression unit 97 is installed on the upper surface of the base unit 70, and is disposed in the space between the base 91 and the swing suppression unit 97 in the Z direction. The swing suppression unit 97 is normally out of contact with the base 91 (i.e., when the base 91 is not swinging). On the other hand, when swinging occurs, the swing suppression unit 97 comes into contact with the underside of the base 91, thereby suppressing the swing of the base 91.

[0066] 9, an example of the configuration of the sway suppression unit 97 includes a base unit 98 and an upper base unit 99. The base unit 98 is a member that is approximately triangular when viewed from the X direction, as shown in FIG. 9, for example, and the bottom surface of the triangle is fixed in surface contact with the upper surface of the pedestal unit 70.

[0067] 9 when viewed from the X direction, the upper base part 99 is a member having a substantially inverted triangular shape, and its lowest part, which corresponds to the apex, is connected to the base part 70 by a structure such as a pin connection so as to be rotatable around the X axis. The upper surface of the upper base part 99, which corresponds to the base of the inverted triangle, is disposed opposite the lower surface of the receiving base 91 at a distance that allows contact when the upper base part 99 swings.

[0068] A state in which the receiving base 91 of the second blade posture adjustment unit 90 is likely to swing may occur during the operation of moving the blade 104 to the tip of the tower 101, when the blade 104 reaches the tip, or when the blade 104 is set in the second blade posture adjustment unit 90 at an installation position at the bottom of the tower 101. In this embodiment, the second blade posture adjustment unit 90 has a swing suppression unit 97, so that when such swinging occurs, the upper base part 99 comes into contact with the receiving base 91, thereby suppressing the swing. Suppressing the swinging can reduce the load applied to the wires 93 and 94, thereby stabilizing the state in which the blade 104 is held by the second blade posture adjustment unit 90.

[0069] In this way, the blade transport device 40 according to this embodiment can arbitrarily adjust the rotation angles θ11, θ21 of the blade 104 about the longitudinal direction C3 and the inclination angles θ12, θ22 of the longitudinal direction C3 of the blade 104 relative to the horizontal direction by the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90. This further improves the positioning accuracy of the blade 104, making it easier to move the blade 104 to the connection part with the hub 103.

[0070] 7 and 8, the blade transport device 40 further includes a receiving portion 54. The receiving portion 54 is an element that supports the underside of the pedestal portion 70 and is located between the pair of moving bases 31 and 32 in the second horizontal direction (Y direction) on the tip end side of the pedestal portion 70 from the base portion 50 of the pair of climbing beams 23 and 24.

[0071] The receiving portion 54 is installed so that when the blade 104 is suspended from the base portion 70 , the center of gravity of the blade 104 is located between the rotation axis 66 of the blade conveying device 40 and the receiving portion 54 .

[0072] In the blade transport device 40 according to this embodiment, the center of gravity of the blade 104 is positioned between the rotation shaft 66 of the blade transport device 40 and the receiving portion 54 in this manner, thereby making it possible to appropriately distribute the load of the blade 104 received by the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90, which are positioned on either side of the base portion 70 in the longitudinal direction (the X direction in FIGS. 7 and 8 ), relative to this center of gravity. This makes it even easier to adjust the rotation angles θ11, θ21 and the tilt angles θ12, θ22 in the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90.

[0073] It is preferable that the components of the assembly system 1, namely the support 10, the lift-up device 20, the portal frame 30, and the blade transport device 40, are made of metal in consideration of strength and durability.

[0074] Next, the effects of the wind power generator assembly system 1 according to this embodiment will be described. The assembly system 1 of this embodiment comprises a support 10 installed around the tower 101 of the wind power generator 100, a lift-up device 20 installed on the support 10 and moving up and down along the support 10 to individually lift up the nacelle 102, hub 103 and each of the plurality of blades 104A to 104C of the wind power generator 100 to the tip of the tower 101, and a lift-up device 20 installed on the lift-up device 20 and movable in a first horizontal direction (X direction) to move towards and away from the tower 101, capable of individually suspending the nacelle 102 and the hub 103, and suspending the nacelle 102 and the hub 103 lifted by the lift-up device 20. The tower 101 also includes a portal frame 30 that moves the blade horizontally to the connection point with other components of the wind power generator 100, and a blade conveying device 40 that replaces the portal frame 30 and is installed on the lift-up device 20, is capable of individually suspending each of the multiple blades 104A to 104C, is capable of moving one of the multiple blades 104A to 104C in a first horizontal direction and a second horizontal direction (Y direction) perpendicular to the first horizontal direction, and is capable of rotating around a rotation axis 66 that is parallel to the central axis C1 of the tower 101, and moves the one blade raised by the lift-up device 20 to the connection point with the hub 103. After the nacelle 102 is connected to the tower 101 and the hub 103 is connected to the nacelle 102, and the nacelle 102 is rotated around the central axis C1 of the tower 101 so that the connection portion of the hub 103 with the plurality of blades 104A to 104C is positioned opposite the base ends of the blades, the blade transport device 40 moves one of the plurality of blades 104A to 104C to a position opposite the hub 103, and connects the one blade to the hub 103. The remaining plurality of blades are similarly connected one by one to the hub 103 using the lift-up device 20 and the blade transport device 40.

[0075] With this configuration, each component of the wind power generator 100 can be transported to a connection position with other components at the top of the tower 101 using the lift-up device 20, the portal frame 30, and the blade transport device 40. Therefore, while the lift-up device 20 is lowered to a predetermined position at the bottom of the support 10, each component of the wind power generator 100 can be suspended from the portal frame 30 and the blade transport device 40. This eliminates the need to use a crane to lift each component of the wind power generator 100 to a connection position with other components at the top of the tower 101. This allows the components to be lifted to a lower height than in conventional methods, allowing the crane used to transport each component of the wind power generator 100 to be smaller than in conventional methods. A smaller crane also reduces the area required for the crane's installation. Furthermore, the lighter weight of the crane also alleviates the strength requirements for the ground at the installation site. Furthermore, even if the wind power generator 100 becomes larger, the height at which each part is suspended by the crane from the gantry frame 30 and the blade transport device 40 remains the same; only the height of the support pillars 10 of the assembly system 1 and the lifting distance of the lift-up device 20 increase, so that even under adverse conditions such as strong winds, the workability is not adversely affected, and workability can be improved.

[0076] In the past, when wind turbines became larger and lifting each component using a crane made assembly difficult, a method was proposed in which the rotor was assembled in advance by connecting the blades 104A-104C to the hub 103 on the ground or at a lower position on the tower, and then the assembled rotor was lifted to the installation position at the top of the tower. In this conventional method, the ground area required for construction is thought to be approximately 1.5 times the diameter of the rotor, i.e., the length in the Y direction in this embodiment. In contrast, the assembly system 1 of this embodiment can individually transport the nacelle 102, hub 103, and each of the blades 104A-104C of the wind turbine 100 to the connection position with other components at the top of the tower 101 using the lift-up device 20, portal frame 30, and blade transport device 40. This allows the Y-direction dimension of each part to fit within the width of the portal frame 30 and the blade transport device 40 when transporting, further reducing the ground area required for constructing the wind power generator 100 compared to conventional methods. As a result, the wind power generator assembly system 1 according to this embodiment can reduce the ground area required for constructing the wind power generator and improve workability.

[0077] Furthermore, in the assembly system 1 of this embodiment, the support 10 has four pillars 11 to 14 erected around the tower 101 and a beam 15 connecting adjacent pillars 11 to 14, and is installed in a quadrangular shape around the central axis C1 of the tower 101, with the pillars 11 to 14 forming the corners and the beam 15 forming the sides. The lift-up device 20 is arranged extending horizontally along one pair of opposite sides of the quadrangular shape of the support 10, and has a pair of climbing beams 23, 24 on which the portal frame 30 and the blade transport device 40 are movably installed, and a pair of measuring devices 21, 22 connected to two of the four pillars 11 to 14 of the support 10 (in this embodiment, the two pillars 11 and 12) and capable of moving up and down along the two pillars 11 and 12. The climbing beams 23, 24 have first beams 23A, 24A whose base ends are connected to the measuring devices 21, 22 and whose tip ends extend away from the support 10, and second beams 23B, 24B connected to the base or tip ends of the first beams 23A, 24A so as to extend in the same direction as the first beams 23A, 24A. When the nacelle 102 and hub 103 are installed using the portal frame 30, the second beams 23B, 24B are connected to the base ends of the first beams 23A, 24A, and when the blades 104A to 104C are installed using the blade transport device 40, the second beams 23B, 24B are detached from the base ends of the first beams 23A, 24A and reconnected to the tip ends of the first beams 23A, 24A, and the climbing beams 23, 24 are extended in the direction away from the support 10.

[0078] With this configuration, in order to suspend the long blades 104A to 104C from the blade transport device 40 relative to the nacelle 102 and the hub 103, it is possible to position the blade transport device 40 farther from the support 10 than the portal frame 30. As a result, it is possible to suspend the blades 104A to 104C from the blade transport device 40 while avoiding the base ends of the blades 104A to 104C coming into contact with the support 10 or the tower 101, without changing the installation position of the lift-up device 20 relative to the support 10 from the two pillars 11 and 12. This further improves work efficiency.

[0079] <How to assemble a wind turbine> A method for assembling a wind power generator using the assembly system 1 according to this embodiment will be described with reference to FIGS.

[0080] FIG. 11 is a side view showing the first stage of the assembly procedure for the wind power generator 100. Prior to the first stage shown in FIG. 11, the bottom tower 101A, second tower 101B, third tower 101C, fourth tower 101D, and top tower 101E have been connected to assemble the tower 101 of the wind power generator 100, and the support columns 10 have been installed around the tower 101. For example, the support columns 10 are raised upward as each stage of the tower 101 is installed, and additional support columns are inserted and connected between the raised lower end and the installation surface. This process is repeated, and the support columns 10 are extended upward in stages until they finally reach the state shown in FIG. 11.

[0081] 11, the lift-up device 20 is placed in a predetermined position below the support column 10, and the nacelle 102 is suspended from the portal frame 30 via wires 39 using a crane or the like. Once the suspension of the nacelle 102 is complete, the lift-up device 20 moves upward as shown by arrow A1 (nacelle installation step).

[0082] 12 is a side view showing the second stage of the assembly procedure for the wind power generator 100. The lift-up device 20 rises to a predetermined position at the top end of the support column 10. After that, the portal frame 30 moves toward the support column 10 as shown by arrow B1, and as a result, the nacelle 102 suspended from the portal frame 30 moves to the connection position at the top end of the tower 101 (nacelle installation step).

[0083] 13 is a side view showing a third stage of the assembly procedure for the wind turbine generator 100. When the portal frame 30 moves to a position above the support columns 10 and the nacelle 102 suspended from the portal frame 30 moves to a connection position at the top end of the tower 101, the nacelle 102 is connected to the top end of the tower 101 (nacelle installation step). At this time, the nacelle 102 is brought close to the top end of the tower 101 while the position of the rotation axis of the nacelle 102 is adjusted to align with the position of the axis C1 of the tower 101. As a result, the nacelle 102 is connected to the tower 101 so as to be rotatable about the rotation axis C1.

[0084] 5 and other figures, the lower part of the portal frame 30 is open, and furthermore, the support mast 10 is disposed on the outer periphery of the tower 101, so that in the third stage state shown in Fig. 13, no other members are interposed between the nacelle 102 and the tower 101. For this reason, for example, by extending the wire 39 downward using the suspension device 38 of the portal frame 30 to lower the height position of the nacelle 102, the connecting portions of the nacelle 102 and the tower 101 can be easily brought close to opposing positions and the two can be connected.

[0085] 14 is a side view showing the fourth stage of the assembly procedure for the wind turbine generator 100. The nacelle 102 attached to the tower 101 is rotated 180 degrees around the central axis C1 of the tower 101 as shown by arrow G, so that the connection portion of the nacelle 102 with the hub 103 faces the negative X direction. The lift-up device 20 is lowered to a predetermined position at the bottom end of the support 10, and the hub 103 is suspended from the portal frame 30 via wires 39 using a crane or the like. Once the suspension of the hub 103 is complete, the lift-up device 20 moves upward as shown by arrow A2 (hub installation step).

[0086] 15 is a side view showing a fifth stage in the assembly procedure for the wind turbine generator 100. The lift-up device 20 rises to a predetermined position at the top end of the support column 10. Thereafter, the portal frame 30 moves toward the support column 10 as shown by arrow B2, causing the hub 103 suspended from the portal frame 30 to move to the connection position of the nacelle 102, whereupon the hub 103 is connected to the nacelle 102 (hub installation step). At this time, the hub 103 is brought close to the nacelle 102 while the position of the rotation axis of the hub 103 is adjusted so that it is aligned with the position of the axis C2 of the nacelle 102. As a result, the hub 103 is connected to the nacelle 102 so as to be rotatable about the rotation axis C2.

[0087] 16 is a side view showing a sixth stage in the assembly procedure for the wind power generator 100. The lift-up device 20 is lowered to a predetermined position at the lower end of the support pole 10. Here, the second beams 23B, 24B of the climbing beams 23, 24 are moved from the base end side to the tip end side of the first beams 23A, 24A, and the climbing beams 23, 24 are extended in a direction away from the support pole 10 (extension step).

[0088] In the sixth step, the portal frame 30 moves away from the support columns to the relocated second beams 23B, 24B. Furthermore, as shown in FIG. 16 , the equipment installed on the climbing beams 23, 24 is replaced from the portal frame 30 with the blade transport device 40 (replacement step). The blade transport device 40 is installed on the second beams 23B, 24B that have been relocated to the distal end. The longitudinal dimension of the blade 104 to be transported is longer than that of other elements related to the wind power generator. Therefore, compared to the portal frame 30, the blade transport device 40 needs to be positioned further distally on the climbing beams 23, 24. This allows the blade 104 to be supported so that the base side of the blade 104 does not come into contact with the tower 101 and the center of gravity of the blade 104 is positioned above the blade transport device 40.

[0089] 16 and subsequent figures, the axis C4 of the rotation shaft 66 of the base 70 is illustrated at the center of the base 70 in the X direction, and the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 are both illustrated at positions equidistant from the axis C4 in the X direction. These illustrations are intended to simplify the illustration of the blade transport device 40, and the actual layout of the device is similar to that illustrated in Figure 7 and other figures.

[0090] Furthermore, in the bundles 26 connected between the first beams 23A, 24A and the measuring devices 21, 22, respectively, a second bundle 27 is connected between the middle portion in the extension direction and the second beams 23B, 24B. This makes it possible to more reliably resist the weight of the blade transport device 40 and the blades acting on the climbing beams 23, 24 extended in the negative X direction.

[0091] Fig. 17 is a side view showing a seventh stage in the assembly procedure of the wind turbine generator 100. Fig. 18 is a plan view of the seventh stage shown in Fig. 17. As indicated by arrow H in Fig. 17, the nacelle 102 is rotated around the central axis C1 of the tower 101 so that the connection portions 103A-103C of the hub 103 with the blades 104A-104C are positioned opposite the base ends of the blades 104A-104C (nacelle rotation step). Specifically, the nacelle 102 is rotated about 75 degrees around the central axis C1 so that the tip end of the hub 103 faces the negative Y direction relative to the nacelle 102 (see Fig. 20).

[0092] 17 and 18, in the seventh stage, the first blade 104A is suspended from the first blade posture adjustment unit 80 and the second blade posture adjustment unit 90 (base 70) of the blade transport device 40 using a crane or the like. At this time, as shown in FIG. 18, for example, the first blade 104A is suspended along the X direction so that the longitudinal direction of the base end (for example, the direction of the axis C3 shown in FIG. 18) is perpendicular to the central axis C1 of the tower 101 (suspending step). At this time, the lateral range of the base 70 of the blade transport device 40 is positioned so as to fit between the climbing beams 23 and 24. When the suspension of the first blade 104A is complete, the lift-up device 20 moves upward as indicated by arrow A3 in FIG. 17 (blade installation step).

[0093] Figure 19 is a side view showing an eighth stage in the assembly procedure for the wind power generator 100. Figure 20 is a plan view of the eighth stage shown in Figure 19. The lift-up device 20 rises to a predetermined position at the top end of the support pole 10. Thereafter, the blade transport device 40 moves toward the support pole 10 as shown by arrow B3, causing the first blade 104A suspended from the blade transport device 40 to approach a position facing the connection part 103A of the hub 103 (approach step).

[0094] More specifically, in the blade transport device 40, the base 50 moves integrally with the moving bases 31, 32 in the X direction along the climbing beams 23, 24 (first approaching step) as shown by arrow B31 in Fig. 20. In the example of Fig. 20, the base 50 moves in the positive X direction approaching the tower 101.

[0095] 20 by arrow B32, the base 70 on which the first blade 104A is mounted moves in the Y direction via the intermediate portion 60 disposed between the base 70 and the base 50 (second approaching step). More specifically, the first roller group 65A and the second roller group 65B mounted on the flat plate portion 63 of the intermediate portion 60 and a pair of guide rails 61, 62 mounted on the base 50 to which the roller groups are slidably coupled cause the flat plate portion 63 and the base 70 connected to the flat plate portion 63 via the rotation shaft 66 to move in the Y direction along the guide rails 61, 62. In the example of FIG. 20, the intermediate portion 60 and the base 70 move in the negative Y direction approaching the connection portion 103A of the hub 103.

[0096] Furthermore, as shown by arrow B33 in Fig. 20, the base portion 70 rotates around the Z axis with the rotation shaft 66 of the intermediate portion 60 as the center of rotation (third approach step). In the example of Fig. 20, the base end of the blade 104A rotates counterclockwise when viewed from the positive Z direction (top) of the axis C4 of the rotation shaft 66 so that the base end of the blade 104A approaches the connection portion 103A of the hub 103.

[0097] Here, as described above, in the seventh stage, as shown in Fig. 20, the nacelle 102 is rotated about the central axis C1 by approximately 75 degrees so that the tip of the hub 103 faces the negative Y direction relative to the nacelle 102. As a result, as shown in Fig. 20, the direction of the rotation axis C2 of the hub 103 is tilted by approximately 15 degrees with respect to the Y direction. In addition, the position of the hub 103 about the rotation axis C2 is adjusted so that one connection portion 103A of the connection portions 103A to 103C of the hub 103 with the three blades faces the first blade 104A. For example, the connection portion 103A is adjusted so that it faces the horizontal direction (the negative X direction).

[0098] Then, the blade conveying device 40 is adjusted in position in the X direction, Y direction, and around the Z axis using the above-mentioned method, as shown by arrows B31, B32, and B33 in Figure 20, respectively, so that the base end of the first blade 104A is positioned directly opposite the connecting portion 103A.

[0099] As a result, as shown in Fig. 20, the direction of rotation axis C2 of hub 103 is tilted at approximately 15 degrees with respect to the Y direction. In addition, the position of hub 103 around rotation axis C2 is adjusted so that one connection portion 103A of connection portions 103A to 103C with the three blades of hub 103 faces first blade 104A. For example, connection portion 103A is adjusted to face horizontally (the negative X direction).

[0100] The movement of the blade transport device 40 in the X and Y directions and the rotation about the Z axis may be performed as a set of movements or rotations, for example, by moving the blade transport device 40 to a predetermined position in the X direction, then moving it to a predetermined position in the Y direction, and finally rotating it to a predetermined position about the Z axis. Alternatively, a series of movements, such as moving the blade transport device 40 a predetermined distance in the X direction, then moving it a predetermined distance in the Y direction, and then rotating it a predetermined distance about the Z axis, may be repeated to gradually approach the desired position.

[0101] In the eighth stage, the base end of first blade 104A is then connected to connection portion 103A of hub 103 (blade installation step). An example of this connection procedure will be described with reference to FIGS. 21 to 23. FIG. 21 is a diagram showing a first stage of the procedure for connecting blade 104 to connection portion 103A of hub 103 in the eighth stage. FIG. 22 is a diagram showing a second stage of the procedure for connecting blade 104 to connection portion 103A of hub 103 in the eighth stage. FIG. 23 is a diagram showing a third stage of the procedure for connecting blade 104 to connection portion 103A of hub 103 in the eighth stage.

[0102] Here, the direction in which first blade 104A and connection portion 103A of hub 103 face each other as a result of the above-described position adjustment is defined as the X1 direction, and the direction perpendicular to the X1 direction and the Z direction is defined as the Y1 direction. The X1 direction is the same as the direction of axis C3 of first blade 104A.

[0103] Generally, in a connection structure between a blade and a hub of a wind power generator, a first long rod 105A, a second long rod 105B, and multiple short rods 106 are provided on the end face of the base end of the blade (first blade 104A) so as to protrude in the X1 direction. The first long rod 105A, the second long rod 105B, and the short rods 106 are arranged, for example, at approximately equal intervals along the circumferential direction around the longitudinal direction C3. Furthermore, the first long rod 105A and the second long rod 105B are preferably arranged point-symmetrically with respect to the longitudinal direction C3, i.e., the center C3 of the circular shape of the end face of the blade (see FIG. 22). The second long rod 105B has a length that is equal to the length between the first long rod 105A and the short rods 106.

[0104] Meanwhile, a first hole 107A, a second hole 107B, and multiple holes 108 are formed in the end face of the connecting portion 103A of the hub 103, with the X1 direction as the axial direction. The first hole 107A, the second hole 107B, and the multiple holes 108 are formed with diameters and depths that allow the first long rod 105A, the second long rod 105B, and the short rod 106 to fit therein. The first hole 107A, the second hole 107B, and the multiple holes 108 are arranged, for example, at approximately equal intervals along the circumferential direction around the longitudinal direction C3, so that the rods 105A, 105B, and 106 can be fitted therein. Preferably, the first hole 107A and the second hole 107B are arranged point-symmetrically with respect to the axis C6 of the connecting portion 103A of the hub 103, i.e., the center C6 of the circular shape of the end face of the connecting portion 103A (see FIG. 22).

[0105] For the sake of convenience, the names of the holes are changed in this paper to first hole 107A, second hole 107B, and multiple holes 108. However, in reality, all holes have the same dimensions and shape. Initially, only short rods 106 are installed on the end face of the base end of the blade. Prior to the first step of the connection procedure shown in FIG. 21, two of the short rods 106 are replaced with first long rod 105A and second long rod 105B. In other words, the short rods 106 are standard rods for connecting the blade 104 to the connection portion 103A of the hub 103. Meanwhile, the first long rod 105A and second long rod 105B are long guide rods temporarily used when connecting the blade 104 to the connection portion 103A of the hub 103.

[0106] The blade transport device 40 uses the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 to adjust the axial direction of the first long rod 105A to the X1 direction, for example, as shown by arrow B41 in Fig. 21, to eliminate the tilt with respect to the X1 axis. In other words, the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 are used to adjust the tilt angles θ12 and θ22 (see Figs. 9 and 10) (attitude adjustment step).

[0107] Similarly, the blade transport device 40 uses the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 to adjust the tip position of the first long rod 105A around the longitudinal direction C3 so that it faces the first hole 107A, as shown by arrow B42 in Fig. 21. In other words, the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 are used to adjust the rotation angles θ11 and θ21 (see Figs. 9 and 10) (attitude adjustment step).

[0108] In this process, as shown by arrows B43 and B44 in FIG. 21, the base 50 and intermediate section 60 of the blade transport device 40 can also be used to adjust the position in the X and Y directions using the above-mentioned method. Once the first long rod 105A has been adjusted to a position directly facing the first hole 107A, the long rod 105A is inserted into the first hole 107A as shown by arrow B45 in FIG. 21. The insertion operation can be performed by adjusting the position in the X and Y directions as shown by arrows B43 and B44 in FIG. 21. At this time, as shown in FIG. 21, the first long rod 105A is inserted only until the second long rod 105B and short rod 106 come into contact with the holes 107B and 108, respectively.

[0109] Next, as shown in Fig. 22, the position of the first blade 104A is adjusted so that the second long rod 105B reaches a position directly facing the second hole 107B, as indicated by arrow B46 in Fig. 22, with the positions of the first long rod 105A and the first hole 107A as the rotation center. As a result, as shown in Fig. 22, the longitudinal direction C3 of the first blade 104A is aligned with the axis C6 of the connection portion 103A of the hub 103. Furthermore, each of the multiple short rods 106 moves to a position directly facing the corresponding hole 108.

[0110] Then, from this state, as shown by arrow B47 in Fig. 23, when the first long rod 105A is further inserted into the first hole 107A and the second long rod 105B is inserted into the second hole 107B, the other multiple short rods 106 are also fitted into the respective holes 108 of the connecting portion 103A of the hub 103, as shown in Fig. 23. As a result, the first long rod 105A, the second long rod 105B, and the multiple short rods 106 are all fitted into the respective holes 107A, 107B, and 108 of the connecting portion 103A, and the base end of the first blade 104A is completely connected to the connecting portion 103A of the hub 103.

[0111] 23, the first long rod 105A and the second long rod 105B used as the guide rods are replaced with the short rods 106 as the standard rod material. In other words, after the blade 104 is connected to the connection part 103A of the hub 103, only the short rods 106 as the standard rod material are fitted into all the holes of the same shape on the hub 103 side.

[0112] 21 to 23 illustrate an example of a configuration in which the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 of the blade transport device 40 are used to connect the base end of the first blade 104A to the connection unit 103A of the hub 103. However, the configuration of the connection procedure is not limited to this example, and may be a configuration in which, for example, the nacelle 102 or the hub 103 is used to adjust the rotation angle of the nacelle 102 about the central axis C1 or the rotation angle of the hub 103 about the rotation axis C2, or a combination of these two configurations may be applied.

[0113] Figure 24 is a side view showing a ninth stage in the assembly procedure for the wind power generator 100. After the first blade 104A is attached to the hub 103, the first blade 104A is removed from the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 of the blade transport device 40. Thereafter, as shown by arrow A4 in Figure 24, the lift-up device 20 descends to a predetermined position at the bottom end of the support pole 10 (descent step).

[0114] 25 is a side view showing a tenth stage in the assembly procedure for wind power generator 100. As indicated by arrow I, hub 103 rotates 120 degrees around rotation axis C2, and first blade 104A pivots toward the X positive direction. As a result, the position of hub 103 around rotation axis C2 is adjusted so that one connection portion 103B of connection portions 103A to 103C with the three blades of hub 103 faces second blade 104B. For example, connection portion 103B is adjusted to face horizontally (the X negative direction).

[0115] In a tenth step, a crane or the like is used to hang the second blade 104B from the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 provided on the base 70 of the blade transport device 40. Similar to the first blade 104A shown in Fig. 18, the second blade 104B is also installed so that the longitudinal direction C3 of the base end is perpendicular to the axial direction C1 of the tower 101 and extends along the X direction. Thereafter, the lift-up device 20 rises as indicated by arrow A5 (blade installation step).

[0116] 26 is a side view showing an eleventh step in the assembly procedure for the wind power generator 100. The lift-up device 20 rises to a predetermined position at the top end of the support pole 10. Thereafter, the blade transport device 40 moves toward the support pole 10 as shown by arrow B5. As a result, the second blade 104B, which is suspended from the first blade position adjustment unit 80 and the second blade position adjustment unit 90 of the blade transport device 40, approaches a position facing the connection part 103B of the hub 103 (approaching step). Then, the base end of the second blade 104B is connected to the connection part 103B of the hub 103 (blade installation step). At this time, the first blade position adjustment unit 80 and the second blade position adjustment unit 90 adjust the rotation angle θ of the axis C3 of the second blade 104B and the tilt angle α about the rotation axis C4 so that the base end of the second blade 104B faces the connection part 103B of the hub 103, while the second blade 104B approaches the hub 103. These adjustment methods are the same as those described with reference to FIGS.

[0117] After the 11th step, as in the 9th step shown in Figure 24, the second blade 104B is removed from the first blade posture adjustment unit 80 and the second blade posture adjustment unit 90 of the blade conveying device 40, and then the lift-up device 20 descends to a predetermined position at the lower end of the support 10 (descent step).

[0118] 27 is a side view showing a twelfth stage in the assembly procedure for wind power generator 100. As indicated by arrow J, hub 103 rotates 120 degrees around rotation axis C2, and second blade 104B pivots toward the X positive direction. As a result, the position of hub 103 around rotation axis C2 is adjusted so that one connection portion 103C of the three blade connection portions 103A to 103C of hub 103 faces third blade 104C. For example, connection portion 103C is adjusted to face horizontally (the X negative direction).

[0119] In the twelfth step, first, a crane or the like is used to hang the third blade 104C from the first blade posture adjustment unit 80 and the second blade posture adjustment unit 90 of the blade transport device 40. Similar to the first blade 104A shown in FIG. 18 , the third blade 104C is also installed with its longitudinal direction C3 aligned along the X direction.

[0120] 27, the lift-up device 20 rises to a predetermined position at the upper end. Next, as shown by arrow B6, the blade transport device 40 moves toward the support 10, and as a result, the third blade 104C suspended from the blade transport device 40 approaches a position facing the connection portion 103C of the hub 103 (approaching step), and the base end of the third blade 104C is connected to the connection portion 103C of the hub 103 (blade installation step). At this time, the rotation angle θ of the axis C3 of the third blade 104C and the tilt angle α about the rotation axis C4 are adjusted so that the base end of the third blade 104C faces the connection portion 103C of the hub 103, while the third blade 104C approaches the hub 103. Note that these adjustment methods are similar to the methods described with reference to FIGS. 21 to 23.

[0121] 28 is a side view showing the thirteenth stage of the assembly procedure for the wind power generator 100. In this stage, the third blade 104C is removed from the first blade attitude adjustment unit 80 and the second blade attitude adjustment unit 90 of the blade transport device 40. Thereafter, the lift-up device 20 is lowered to a predetermined position at the bottom end of the support 10, as shown by arrow A6 (lowering step). After the lift-up device 20 has lowered, the nacelle 102 rotates 90 degrees around the central axis C1 of the tower 101, as shown by arrow K, and transitions to an attitude in which the hub 103 faces the negative X direction. As a result, the assembly of the wind power generator 100 is completed.

[0122] After the thirteenth stage, each device of the assembly system 1 is removed from around the wind power generator 100, and the wind power generator 100 is finally completed as shown in FIG.

[0123] Next, the effects of the wind power generator assembly method according to this embodiment will be described. The wind power generator assembly method according to this embodiment includes a nacelle installation step (processes from the first stage in FIG. 11 to the third stage in FIG. 13), a hub installation step (processes from the fourth stage in FIG. 14 to the fifth stage in FIG. 15), and a blade installation step (processes from the sixth stage in FIG. 16 to the thirteenth stage in FIG. 28). In the nacelle installation step, the nacelle 102 of the wind power generator 100 is suspended from the portal frame 30 and raised to the tip of the tower 101 by the lift-up device 20, and the portal frame 30 is moved horizontally to move the nacelle 102 to just above the tip of the tower 101, where the nacelle 102 is connected to the tower 101. In the hub installation step, the hub 103 of the wind power generator 100 is hung from the portal frame 30 and raised to the tip of the tower 101 by the lift-up device 20, the portal frame 30 is moved horizontally to move the hub 103 to a position opposite the nacelle 102, and the hub 103 is connected to the nacelle 102. In the blade installation step, one of the multiple blades 104A to 104C of the wind power generator 100 is hung from the blade transport device 40 and raised to the tip of the tower 101 by the lift-up device 20, the blade transport device 40 is moved horizontally to move the lifted blade to a position opposite the hub 103, and this single blade is connected to the hub 103, and the remaining multiple blades are similarly connected one by one to the hub 103 using the lift-up device 20 and the blade transport device 40.

[0124] With this configuration, each component of the wind power generator 100 can be transported to a connection position with other components at the top of the tower 101 using the lift-up device 20, the portal frame 30, and the blade transport device 40. Therefore, while the lift-up device 20 is lowered to a predetermined position at the bottom of the support 10, each component of the wind power generator 100 can be suspended from the portal frame 30 and the blade transport device 40. This eliminates the need to use a crane to lift each component of the wind power generator 100 to a connection position with other components at the top of the tower 101. This allows the components to be lifted to a lower height than in conventional methods, allowing the crane used to transport each component of the wind power generator 100 to be smaller than in conventional methods. A smaller crane also reduces the area required for the crane's installation. Furthermore, the lighter weight of the crane also alleviates the strength requirements for the ground at the installation site. Furthermore, even if the wind power generator 100 becomes larger, the height at which each part is suspended by the crane from the gantry frame 30 and the blade transport device 40 remains the same; only the height of the support pillars 10 of the assembly system 1 and the lifting distance of the lift-up device 20 increase, so that even under adverse conditions such as strong winds, the workability is not adversely affected, and workability can be improved.

[0125] In the past, when wind turbines became larger and lifting each component using a crane made assembly difficult, a method was proposed in which the rotor was assembled in advance by connecting the blades 104A-104C to the hub 103 on the ground or at a lower position of the tower, and then the assembled rotor was lifted to the installation position at the top of the tower. In this conventional method, the ground area required for construction is considered to be approximately 1.5 times the diameter of the rotor, i.e., the length in the Y direction in this embodiment, the width. In contrast, in this embodiment, the nacelle installation step, hub installation step, and blade installation step described above allow the nacelle 102, hub 103, and each of the blades 104A-104C of the wind turbine 100 to be individually transported to the connection position with other components at the top of the tower 101 using the lift-up device 20, portal frame 30, and blade transport device 40. This allows the Y-direction dimension of each part to fit within the width of the portal frame 30 when transporting it, further reducing the ground area required for constructing the wind power generator 100 compared to conventional methods. As a result, the wind power generator assembly method according to this embodiment can reduce the ground area required for constructing the wind power generator and improve workability.

[0126] In addition, the wind turbine generator assembly method of this embodiment includes, after the hub installation step, a nacelle rotation step (seventh step in Figures 17 and 18) in which the nacelle 102 is rotated around the central axis C1 of the tower 101 so that the connection portions 103A to 103C between the hub 103 and the blades 104A to 104C are positioned opposite the base ends of the blades 104A to 104C.

[0127] With this configuration, the direction in which the blades 104A to 104C are horizontally moved by the blade transport device 40 to install them on the hub 103 can be the same as the direction in which the nacelle 102 is installed on the tower 101 and the direction in which the hub 103 is installed on the nacelle 102. This allows the blade installation step to be performed after the nacelle installation step and the hub installation step without changing the installation position of the lift-up device 20 of the assembly system 1 relative to the support 10, thereby improving work efficiency.

[0128] In addition, the wind turbine assembly method of this embodiment includes an extension step (the sixth step in Figure 16) between the hub installation step and the blade installation step, in which the second beams 23B, 24B of the climbing beams 23, 24 of the lift-up device 20 are detached from the base end side of the first beams 23A, 24A and reconnected to the tip end side of the first beams 23A, 24A, and the climbing beams 23, 24 are extended in a direction away from the support 10.

[0129] With this configuration, in order to suspend the long blades 104A to 104C from the blade transport device 40 relative to the nacelle 102 or the hub 103, the position of the blade transport device 40 can be separated from the support 10. As a result, even without changing the installation position of the lift-up device 20 relative to the support 10, the base ends of the blades 104A to 104C can be prevented from contacting the support 10 or the tower 101, and the blades can be suspended from the blade transport device 40. This further improves work efficiency.

[0130] Note that if the steps of the method for assembling a wind power generator using the assembly system 1 of this embodiment, which has been described with reference to Figures 11 to 28, are carried out in reverse, i.e., if the steps are carried out in descending order from the 13th step shown in Figure 28 to the 1st step shown in Figure 11, then this will result in a method for dismantling a wind power generator.

[0131] More specifically, for example, a method of dismantling a wind power generator includes a blade removal step of raising the lift-up device 20 carrying the blade transport device 40 to the tip of the tower 101, removing one of the multiple blades 104A to 104C of the wind power generator from the hub 103, hanging the removed blade on the blade transport device 40 and lowering it to the bottom end of the tower 101 by the lift-up device 20, and then removing it from the blade transport device 40, and similarly removing the remaining multiple blades 104A to 104C one by one from the hub 103 using the lift-up device 20 and the blade transport device 40; and placing the blade transport device 40 installed on the lift-up device 20 on the portal frame 30. a hub removal step in which the lift-up device 20 carrying the portal frame 30 is raised to the tip of the tower 101, the hub 103 is removed from the nacelle 102, the removed hub 103 is hung on the portal frame 30 and lowered to the bottom end of the tower 101 by the lift-up device 20, and then removed from the portal frame 30; and a nacelle removal step in which the lift-up device 20 carrying the portal frame 30 is raised to the tip of the tower 101, the nacelle 102 is removed from the tower 101, the removed nacelle 102 is hung on the portal frame 30 and lowered to the bottom end of the tower 101 by the lift-up device 20, and then removed from the portal frame 30.

[0132] The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Design modifications to these specific examples made by a person skilled in the art as appropriate are also included within the scope of the present disclosure as long as they comprise the features of the present disclosure. The elements of the above-described specific examples, as well as their arrangement, conditions, shape, etc., are not limited to those exemplified and can be modified as appropriate. The elements of the above-described specific examples can be combined in various ways as appropriate, as long as no technical contradictions arise.

[0133] In the above embodiment, the assembly system 1 for the wind power generator 100 according to this embodiment is exemplified as being configured to be applied to the construction of a land-based wind power generation facility, but it can also be applied to the construction of an offshore wind power generation facility. [Explanation of symbols]

[0134] 1. Wind turbine assembly system 10 pillars 11, 12, 13, 14 Pillar material 15 Beam material 20 Lift-up device (elevating device) 21, 22 Measurement device 23, 24 Climbing beam 23A, 24A First beam 23B, 24B Second beam 30 Gate-type frame 33, 34 Pillar material 35 Beam material 38 Suspension equipment 36 Gate frame collapse prevention 40 Blade transport device 50 base 60 Middle 66 Rotation axis 70 Base 80 First blade attitude adjustment unit 90 Second blade attitude adjustment unit 100 Wind Turbines 101 Tower 102 Nacelle 103 Hub 103A, 103B, 103C connection parts 104A No. 1 Blade 104B Second Blade 104C 3rd Blade C1 Central axis of the tower, rotation axis of the nacelle

Claims

1. A support pole installed around the tower of the wind turbine; an elevating device that is installed on the support and moves up and down along the support; a portal frame installed on the lifting device and moving toward and away from the tower in a first horizontal direction; a blade transport device that is installed on the lifting device and that suspends each of the plurality of blades of the wind power generator individually, moves each suspended blade in the first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, and rotates each suspended blade around a rotation axis that is parallel to the central axis of the tower; A method for assembling a wind turbine generator using an assembly system comprising: a nacelle installation step of suspending a nacelle of the wind power generator from the portal frame, raising it to the tip of the tower by the lifting device, horizontally moving the portal frame to move the nacelle to directly above the tip, and connecting the nacelle to the tower; a hub installation step of suspending a hub of the wind power generator from the portal frame, raising it to the tip of the tower by the lifting device, horizontally moving the portal frame to move the hub to a position facing the nacelle, and connecting the hub to the nacelle; a nacelle rotating step of rotating the nacelle around the central axis of the tower so that connection portions of the hub with the plurality of blades of the wind power generator are positioned opposite base ends of the blades; a replacement step of replacing the portal frame installed on the lifting device with the blade transport device; a blade installation step of suspending the one blade of the plurality of blades of the wind power generator on the blade transport device and raising it to the tip of the tower by the lifting device, horizontally moving the one blade suspended on the blade transport device in the first horizontal direction and the second horizontal direction and rotating it around the rotation axis to move the one blade to a position facing the hub and connecting the one blade to the hub, and similarly connecting the remaining plurality of blades one by one to the hub using the lifting device and the blade transport device; A method for assembling a wind turbine generator, comprising:

2. The support pillars have four pillars erected around the periphery of the tower and beams connecting adjacent pillars, and are installed in a quadrilateral shape around the central axis, with the pillars forming corners and the beams forming sides; The lifting device includes a pair of climbing beams that are arranged to extend horizontally along a pair of opposite sides of the rectangular shape of the support, and on which the portal frame and the blade transport device are movably installed, and a pair of measuring devices that are connected to two of the four pillar members of the support and can be raised and lowered along the two pillar members, The climbing beam has a first beam whose base end side is connected to the measuring device and whose tip end side extends away from the support, and a second beam connected to the base end side or the tip end side of the first beam so as to extend in the same direction as the first beam, and until the hub installation step, the second beam is connected to the base end side of the first beam, Between the hub installation step and the blade installation step, an extension step of detaching the second beam of the climbing beam from the base end side of the first beam and reconnecting it to the tip end side of the first beam, and extending the climbing beam in a direction away from the support; 2. A method for assembling a wind turbine generator according to claim 1, comprising:

3. The blade conveying device is a pair of moving bases that are movable in the first horizontal direction along each of the pair of climbing beams and extend along the first horizontal direction; a base portion that is bridged between the pair of movable bases along the second horizontal direction at end positions of the pair of movable bases in a direction away from the tower and is fixed to the movable bases; an intermediate portion disposed above the base portion and movable relative to the base portion in the second horizontal direction, the intermediate portion having the rotation shaft disposed therein; a base portion that is installed above the intermediate portion and is rotatable around the rotation axis relative to the base portion and the intermediate portion, has a longitudinal dimension that is longer than the dimension of the pair of moving bases along the first horizontal direction, extends from the rotation axis toward the tower, and suspends the blade above; and The blade installation step includes: a hanging step of hanging the blade from the base portion so that a longitudinal direction of the blade is aligned with a longitudinal direction of the base portion; a first approaching step of moving the base together with the moving base in the first horizontal direction after the hanging step to bring the blade closer to the hub in the first horizontal direction; a second approaching step of moving the intermediate portion in the second horizontal direction after the hanging step to bring the blade closer to the hub in the second horizontal direction; a third approaching step of rotating the base portion around the rotation axis to bring the blade closer to the hub around the rotation axis after the hanging step; 3. The method of assembling a wind turbine generator according to claim 2, comprising:

4. The blade conveying device is a first blade attitude adjustment unit that is disposed at a longitudinal tip of the base on the opposite side from the rotation axis, suspending the blade and adjusting the rotation angle of the blade about the longitudinal direction and the inclination angle of the base with respect to the longitudinal direction; a second blade attitude adjustment unit that is disposed at a base end of the base near the rotation axis, suspending the blade and adjusting the rotation angle of the blade about the longitudinal direction and the inclination angle of the base relative to the longitudinal direction; and The blade installation step includes: and after the hanging step, an attitude adjusting step of adjusting the attitude of the blade so as to face the hub directly using the first blade attitude adjusting unit or the second blade attitude adjusting unit. A method for assembling a wind power generator according to claim 3.

5. A support pole installed around the tower of the wind turbine; a lifting device that is installed on the support and moves up and down along the support, and lifts the nacelle, the hub, and each of the plurality of blades of the wind turbine generator individually to the tip of the tower; a portal frame that is installed on the lifting device and is movable in a first horizontal direction to approach and move away from the tower, that can individually suspend the nacelle and the hub, and that horizontally moves the nacelle and the hub, which are lifted by the lifting device, individually to connection portions with other components of the wind power generator; a blade transport device that is installed on the lifting device in place of the portal frame, that can suspend each of the plurality of blades individually, that can move one of the plurality of blades in the first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, and that can rotate about a rotation axis parallel to the central axis of the tower, and that moves the one blade lifted by the lifting device to a connection portion with the hub; Equipped with the blade transport device connects one blade of the plurality of blades to a position facing the hub after the nacelle is connected to the tower, the hub is connected to the nacelle, and the nacelle is rotated around the central axis of the tower so that a connection portion of the hub with the plurality of blades is positioned opposite to a base end portion of the blade; Similarly, the remaining blades are connected one by one to the hub using the lifting device and the blade transport device. Wind turbine assembly system.

6. The support pillars have four pillars erected around the periphery of the tower and beams connecting adjacent pillars, and are installed around the central axis of the tower in a quadrilateral shape with the pillars as corners and the beams as sides, The lifting device includes a pair of climbing beams that are arranged to extend horizontally along a pair of opposite sides of the rectangular shape of the support, and on which the portal frame and the blade transport device are movably installed, and a pair of measuring devices that are connected to two of the four pillar members of the support and can be raised and lowered along the two pillar members, The climbing beam has a first beam whose base end side is connected to the measuring device and whose tip end side extends away from the support, and a second beam connected to the base end side or the tip end side of the first beam so as to extend in the same direction as the first beam, The second beam is When the nacelle and the hub are attached using the portal frame, the portal frame is connected to the base end side of the first beam, When the blade is attached using the blade carrier device, the blade carrier device is detached from the base end side of the first beam and reconnected to the tip end side of the first beam, and the climbing beam is extended in a direction away from the support. The assembly system for a wind power generator according to claim 5.

7. The blade conveying device is a pair of moving bases that are movable in the first horizontal direction along each of the pair of climbing beams and extend in the first horizontal direction; a base portion that is bridged between the pair of movable bases along the second horizontal direction at end positions of the pair of movable bases in a direction away from the tower and is fixed to the movable bases; an intermediate portion disposed above the base portion and movable relative to the base portion in the second horizontal direction, the intermediate portion having the rotation shaft disposed therein; a base portion that is installed above the intermediate portion and is rotatable around the rotation axis relative to the base portion and the intermediate portion, and that has a longitudinal dimension that is longer than the dimension of the pair of moving bases along the first horizontal direction and extends from the rotation axis toward the tower; and The wind power generator assembly system according to claim 6 , wherein the blades are suspended from the base so that the longitudinal direction of the blades is aligned with the longitudinal direction of the base.

8. The blade conveying device is a first blade attitude adjustment unit that is disposed at a longitudinal tip of the base on the opposite side from the rotation axis, suspending the blade and adjusting the rotation angle of the blade about the longitudinal direction and the inclination angle of the base with respect to the longitudinal direction; a second blade attitude adjustment unit that is disposed at a base end of the base near the rotation axis, suspending the blade and adjusting the rotation angle of the blade about the longitudinal direction and the inclination angle of the base relative to the longitudinal direction; having The assembly system for a wind turbine generator according to claim 7.

9. The blade conveying device is The pair of climbing beams are bridged along the second horizontal direction between the pair of moving bases at the tip end side of the pedestal portion from the base portion, and have a receiving portion that receives the underside of the pedestal portion, When the blade is suspended from the base, the center of gravity of the blade is disposed between the rotation axis and the receiving portion. The assembly system for a wind turbine generator according to claim 7.

10. A support pole installed around the tower of the wind turbine; an elevating device that is installed on the support and moves up and down along the support; a portal frame installed on the lifting device and moving toward and away from the tower in a first horizontal direction; a blade transport device that is installed on the lifting device and that suspends each of the plurality of blades of the wind power generator individually, moves each suspended blade in the first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, and rotates each suspended blade around a rotation axis that is parallel to the central axis of the tower; A method for disassembling a wind turbine generator using an assembly system comprising: a blade removal step of raising the lifting device carrying the blade transport device to the tip of the tower, removing one of the plurality of blades of the wind power generator from the hub of the wind power generator, suspending the removed blade on the blade transport device and lowering it to the bottom end of the tower by the lifting device, and then removing it from the blade transport device, and similarly removing the remaining plurality of blades one by one from the hub using the lifting device and the blade transport device; a replacement step of replacing the blade transport device installed on the lifting device with the portal frame; a hub removal step of raising the lifting device carrying the portal frame to the tip of the tower, removing the hub from the nacelle of the wind power generator, suspending the removed hub on the portal frame, and lowering the removed hub to the bottom end of the tower by the lifting device, and then removing the hub from the portal frame; a nacelle removal step of raising the lifting device on which the portal frame is mounted to the tip of the tower, removing the nacelle from the tower, suspending the removed nacelle on the portal frame, and lowering the removed nacelle to the lower end of the tower by the lifting device, and then removing the nacelle from the portal frame; A method for dismantling a wind turbine, including:

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