JP7063977B1 - How to remove the blade, how to attach the blade and hanging jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for removing a blade capable of safely and quickly removing a blade of a large wind turbine which a crane cannot reach.
SOLUTION: A first hanging device is attached to a blade that is not a hanging target, with the tip of a blade that is a hanging target facing downward, and a hanging device is connected to the first hanging device and the blade that is the hanging target. Remove a certain blade from the hub, install a second hanging device inside the hub, and disconnect the first hanging device and the blade to be hung with the second hanging device connected to the blade to be hung. Then, the blade to be hung is hung by the second hanging device.
[Selection diagram] Fig. 3

Description

The present invention relates to a method of removing a blade of a wind turbine used for wind power generation or the like.

Patent Document 1 discloses a method of attaching a blade in a wind turbine used for wind power generation. In the mounting method of Patent Document 1, as shown in FIGS. 2a, 2b, and 2c of Patent Document 1, in order to mount the blade on the hub of the wind turbine, the blade is lifted to the height of the hub by a crane and mounted.

On the other hand, when removing the blade from the hub of the wind turbine at the time of dismantling the wind turbine, the blade is removed with a crane in the same manner as at the time of installation.

European Patent No. 1507795

However, although the method of removing the blade with a crane can be adopted for a wind turbine having a height that the crane can reach, there is a problem that it cannot be adopted for a large wind turbine that the crane cannot reach.

In view of these circumstances, it is an object of the present invention to provide a method for removing blades, which can safely and quickly remove blades of a large wind turbine that cannot be reached by a crane.

The present invention has been made to achieve the above object and is characterized by the following.

The invention according to claim 1 is a method of removing a blade attached to a hub of a wind turbine and suspending the blade, wherein the hub is rotated and the tip of the blade to be suspended is directed downward. In the process, the first hanging device is attached to a blade other than the blade that is the hanging target, and the first hanging device and a part of the blade that is the hanging target and whose tip is directed downward are attached. A first connection step of connecting a hanging jig supported from below , and a removing step of removing the blade to be suspended from the hub while the first hanging device and the hanging jig are connected. In a state where the first hanging device and the hanging tool are connected , the second hanging device is installed inside the hub, and the hanging device to which the second hanging device and the first hanging device are connected is connected . A second connection step of connecting the tools , a release step of disconnecting the first hanging device and the hanging jig in a state where the second hanging device and the hanging jig are connected, and the hanging jig . It is characterized by including a hanging step of hanging the blade, which is the target of hanging, by the second hanging device.

The invention according to claim 2 is the method for removing a blade according to claim 1, wherein the hanging jig is attached to a first mounting portion to which the first hanging device is attached and the second hanging device. The second mounting portion is provided, and a contact portion that abuts from below when the tip of the blade is directed downward is provided with a part of the blade to be suspended. The first suspension device is attached to the first attachment portion, the second suspension device is attached to the second attachment portion in the second connection step, and the first suspension device is attached to the first suspension portion in the release step. It is characterized by removing the device.
The invention according to claim 3 is the method for removing a blade according to claim 2, wherein the hanging jig has a ring-shaped hanging jig main body composed of a plurality of main body members, and the hanging jig main body. Has the contact portion, and in the first connection step, the plurality of main body members are joined so as to sandwich the blade to be suspended inside the ring shape, and the contact portion is attached to the contact portion. It is characterized in that the blade is brought into contact with a flange for attaching the blade to the hub from below when the tip of the blade is directed downward.

The invention according to claim 4 is the method for removing a blade according to any one of claims 1 to 3 , wherein the blade to which the first suspension device is attached has been removed. The attachment step of attaching the attachment member for attaching the first suspension device to the position where the blade was attached is included, and in the first connection step, when the blade for attaching the first suspension device has been removed, It is characterized in that the first suspension device is attached to the attachment member.

The invention according to claim 5 is a hanging jig used in the method for removing a blade according to any one of claims 1 to 4 .

The invention according to claim 6 is a method of attaching a blade for lifting a blade of a wind turbine and attaching it to the hub of the wind turbine, the first step of attaching a first suspending device to a blade other than the blade to be attached. A second suspension device is installed inside the hub, and the second suspension device is connected to the suspension tool that is the attachment target and supports a part of the blade with the tip directed downward from below. Two steps, a third step of lifting the blade to be attached by the second hanging tool via the hanging tool, the hanging tool connected to the second hanging tool, and the first. The fourth step of connecting the hanging device, the fifth step of disconnecting the second hanging device and the hanging jig while the first hanging device and the hanging jig are connected, and the hanging cure. It is characterized by including a sixth step of lifting the blade to be attached to the position of the hub by the first suspension device via a tool and attaching the blade to be attached to the hub. ..

According to the present invention, the blade to be hung can be hung while being replaced by the first hanging device attached to the blade other than the hanging target of the wind turbine and the second hanging device attached to the inside of the hub. Even large wind turbine blades that cranes cannot reach can be safely and quickly removed.

(A) is a front view when the blade 130C of the wind turbine 100 is suspended by the chain block 11, and (B) is a left side view of the same. (A) is a plan view of the hanging jig 1, (B) is the front view of the same, (C) is the left side view of the same, and (D) shows the hanging jig 1 at the lower part of the flange 131 of the blade 130C. It is a plan view when it is attached to. It is a front view which shows the state which the blade 130C is suspended by a chain block 11 using a hanging jig 1. (A) is a front view when the blade 130C of the wind turbine 100 is suspended by the chill climber 21, and (B) is a left side view of the same. It is a front view which shows the state which the blade 130C is suspended by the chill climber 21 using the hanging jig 1. (A) is a front view when the blade 130C of the wind turbine 100 is suspended by a crane, and (B) is a left side view of the same. It is a partially enlarged view when the blade 130C of the wind turbine 100 is suspended by a crane.

An embodiment of the present invention will be described with reference to the drawings.

[1. Configuration of wind turbine 100]
In this embodiment, a method of removing the blade 130C attached to the hub 140 of the wind turbine 100 shown in FIGS. 1A and 1B and suspending the blade 130C from the ground will be described. The wind turbine 100 includes a tower 110, a nacelle 120, three blades 130A, 130B, 130C (hereinafter, the three blades may be collectively referred to as a blade 130), and a hub 140. The tower 110 is, for example, a tower-shaped structure of about 100 m.

The tower 110 is composed of three tower members 111A, 111B, and 111C divided in the height direction (hereinafter, the three tower members may be collectively referred to as a tower member 111). The tower member 111A is the uppermost tower member, the tower member 111B is the tower member in the second stage from the top, and the tower member 111C is the tower member in the third stage (lowermost stage) from the top.

The nacelle 120 stores a bearing, a power generation device, and the like. The power generation device includes a speed increaser that raises the rotation speed of the blade 130, a generator (induction generator, synchronous generator, etc.), and a monitoring device that monitors the operating status of the wind turbine 100. The nacelle 120 is attached to the upper part of the uppermost tower member 111A. Further, a hub 140 is provided on the front side of the nacelle 120, and three blades 130 are attached to the hub 140.

Next, the hanging jig 1 used when the blade 130C is removed from the hub 140 and hung from the hub 140 will be described with reference to FIG.

[2. Configuration of hanging jig 1]
As shown in FIGS. 2 (A), 2 (B), and 2 (C), the hanging jig 1 includes a ring-shaped hanging jig main body 2 (an example of a “contact portion”) and a hanging plate 3. And the hanging piece 4. The hanging jig main body 2 is composed of two semi-ring-shaped main body members 2A and 2B. The hanging jig main body 2 abuts on the flange 131 of the blade 130C from below.

One hanging plate 3 is provided for each of the main body members 2A and 2B, and an insertion hole 3A (an example of the "first mounting portion") is formed in the hanging plate 3. A suspension wire 13 of a chain block 11, which will be described later, is attached to the insertion hole 3A via a shackle.

Further, two hanging pieces 4 are provided on each of the main body members 2A and 2B, and an insertion hole 4A (an example of a "second mounting portion") is formed in the hanging piece 4. A suspension wire 23 of a chill climber 21, which will be described later, is attached to the insertion hole 4A via a shackle.

As shown in FIG. 2 (D), when the hanging jig 1 holds the blade 130 inside the ring-shaped hanging jig main body 2, the outer periphery of the hanging jig main body 2 is from the outer periphery of the flange 131 of the blade 130. Is also getting smaller.

[3. How to remove the blade 130C]
Next, a method of removing the blade 130C according to the present embodiment will be described.

[3.1. Step 1]
As shown in FIG. 1, first, the hub 140 and the blade 130 are rotated so that the tip of the blade 130C to be suspended is directed downward (vertically downward) (an example of the "rotation process").

[3.2. Step 2]
Next, the chain block 11 (an example of the "first suspension device") is attached to the blades 130A and 130B other than the blade 130C to be suspended, and the chain block 11 and the blade 130C to be suspended are connected ("No. 1"). An example of "1 connection process").

In step 2, the chain block 11 is attached to the hanging jig 1 that supports the flange 131 (an example of "a part of the blade") of the blade 130C to be suspended from below, thereby suspending the blade 130C from the chain block 11. The target blade 130C is indirectly connected.

Specifically, as shown in FIG. 3, in order to attach the two chain blocks 11 to the blade 130A and the blade 130B, respectively, the chain block mounting wire 12 provided on the chain block 11 is tied to the blade 130A and the blade 130B, respectively. wear. Further, the jig receiver 14 of the blade 130C is attached so as to be in contact with the lower surface of the flange 131 for attaching the blade 130 to the hub 140 (the lower surface with the tip of the blade 130C facing downward). Next, the main body members 2A and 2B that have been divided in advance are sandwiched between the roots of the blades 130C, and attached by bolting so that the upper surface of the hanging jig main body 2 is in contact with the lower surface of the jig receiver 14.

Then, the hanging wire 13 of the chain block 11 is fixed to the insertion hole 3A formed in the hanging plate 3 of the hanging jig 1 via a shackle. Next, by lifting the hanging jig 1 with the chain block 11, the jig receiving tool 14 and the hanging jig 1 are in contact with each other. As a result, the chain block 11 and the blade 130C are indirectly connected, and the chain block 11 supports the load of the blade 130C.

The work of steps 2 to 5 is performed by a worker on board the gondola 201 that moves up and down by the gondola wire 202 provided along the tower 110.

[3.3. Step 3]
Next, in a state where the chain block 11 and the blade 130C to be hung are connected, the blade 130C to be hung is removed from the hub 140 (an example of the "removal step"). At this time, the chain block 11 receives the load of the blade 130C to prevent the blade 130C from falling.

[3.4. Step 4]
Next, in a state where the chain block 11 and the blade 130C to be suspended are connected, a chill climber 21 (an example of a "second suspension device") is installed inside the hub 140 or the nacelle 120, and the chill climber 21 and the chill climber 21 are installed. The blade 130C to be suspended is connected (an example of the "second connection step").

In step 4, the chill climber 21 is attached to the hanging jig 1 to indirectly connect the chill climber 21 and the blade 130C to be suspended.

Specifically, as shown in FIG. 5, four chill climbers 21 (FIG. 5 shows two chill climbers 21 because of a horizontal view) are fixed to the inside of the hub 140 or the nacelle 120, respectively. The chill climber mounting wires 22 provided on the chill climber 21 are fixed to the fixing portions for mounting on (not shown).

As the installation method of the chill climber 21, an appropriate method is adopted according to the structure of the wind turbine 100 (different for each manufacturer). For example, since many types of wind turbines 100 have a frame that supports the blade 130 inside the hub 140, the chill climber 21 can be installed by hanging a wire or the like as a fixing portion on the frame. Further, it is also possible to adopt a method of suspending the chill climber 21 by replacing the nuts of the bolts and nuts for attaching the blade 130 with eye bolts. Further, if there is no suitable portion for installing the chill climber 21 inside the hub 140, it may be installed at an appropriate portion inside the nacelle 120.

Then, the suspension wire 23 of the chill climber 21 is passed through the insertion hole 4A formed in the suspension piece 4 of the suspension jig 1 and fixed. As a result, the chill climber 21 and the blade 130C are indirectly connected, and the chain block 11 and the chill climber 21 support the load of the blade 130C.

[3.5. Step 5]
Next, the connection between the chain block 11 and the blade 130C to be suspended is released (an example of the "release step"). Specifically, as shown in FIG. 5, the suspension wire 13 of the chain block 11 inserted into the insertion hole 3A of the suspension plate 3 of the suspension jig 1 is removed. As a result, the load of the blade 130C is supported only by the chill climber 21.

[3.6. Step 6]
Next, as shown in FIG. 4, the blade 130C to be suspended is suspended above the ground by the chill climber 21 (an example of the “hanging step”).

As described above, after the blade 130C is suspended from the chain block 11 to the chill climber 21, if the wire of the chill climber 21 is set to a length that reaches the ground, the blade 130C can be moved to the ground only by the chill climber 21. Can be taken down. In step 6, if the blade 130C can be suspended to a height that the crane can reach by the chill climber 21, the chill climber 21 is in the middle of descending as shown in FIGS. 6 (A), 6 (B), and 7 (B). It may be possible to suspend the crane 30 from the above and then suspend the crane 30 to the ground. At this time, the suspension wire 31 attached to the hook at the tip of the arm 30A of the crane 30 is passed through the insertion hole 3A of the vacant suspension plate 3 and fixed. Then, when the load can be received by the arm 30A of the crane 30, the suspension wire 23 of the chill climber 21 is removed from the insertion hole 4A of the suspension piece 4, and the load is transferred from the chill climber 21 to the crane 30. The transfer to the crane 30 is performed on the gondola 201. As a result, the time required for removing the blade 130C can be shortened. The blade 130C can be laid down while being lowered, but at this time, it can also be lowered while being cut on the ground.

As described above, the method of removing the blade 130C for removing and suspending the blade 130C attached to the hub 140 of the wind turbine 100 of the present embodiment is to rotate the hub 140 and perform the blade 130C (“blade to be suspended”). The chain block 11 (an example of the "first suspension device") is attached to the blades 130A and 130B other than the blade 130C and the step 1 (an example of the "rotation process") in which the tip of the "1st suspension device" is directed downward. Step 2 for connecting the blade 130C and the blade 130C (an example of the "first connection step"), and a step 3 for removing the blade 130C from the hub 140 (an example of the "removal step") while the chain block 11 and the blade 130C are connected. In a state where the chain block 11 and the blade 130C are connected, a chill climber 21 (an example of a "second suspension device") is installed inside the hub 140, and a step 4 of connecting the chill climber 21 and the blade 130C ("" An example of the "second connection step"), a step 5 of disconnecting the chain block 11 and the blade 130C (an example of the "release step"), and a step 6 of suspending the blade 130C by the chill climber 21 ("suspension step"). An example)) and.

Therefore, according to the method for removing the blade 130C of the present embodiment, the blade 130C is suspended while being replaced by the chain block 11 attached to the blades 130A and 130B and the chill climber 21 attached to the inside of the hub 140. Even the blade 130C of a large wind turbine 100 that the crane cannot reach can be safely and quickly removed.

Further, in the method of removing the blade 130C of the present embodiment, the chain block 11 is connected to the hanging jig 1 that supports the flange 131 of the blade 130C (an example of "a part of the blade") from below in step 2. Thereby, the chain block 11 and the blade 130C are indirectly connected, and in the step 4, the chill climber 21 and the blade 130C are indirectly connected by connecting the chill climber 21 to the suspension jig 1. As a result, it is not necessary to preliminarily form a portion for connecting the chain block 11 or the chill climber 21 to the blade 130C itself, or to form the portion at the time of removal.

In the above embodiment, as shown in FIG. 3, the chain block 11 is attached to the blades 130A and 130B other than the blade 130C to be suspended by the chain block attachment wire 12, but for example, the blade 130C is suspended. When the blade 130B is hung after being lowered, the chain block 11 cannot be attached because the blade 130C does not exist. Therefore, when the blade 130C to which the chain block 11 is attached does not exist, a hanger (an example of a "mounting member") is installed by using the bolt hole to which the blade 130C is attached, and the chain block is attached to the hanger. 11 may be attached. The hanger can be attached with the chain block mounting wire 12, and may have enough strength to support the load of the blade 130. For example, the hanger may have a structure consisting of only the root portion of the blade 130.

[4. How to install the blade 130C]
In the above embodiment, the method of removing the blade 130 has been described, but the method of attaching the blade 130 to the hub 140 can be obtained by performing the procedure in the reverse procedure. Specifically, the method of attaching the blade 130 for lifting the blade 130 of the wind turbine 100 and attaching it to the hub 140 of the wind turbine 100 includes the following steps.

[4.1. Step 1]
In step 1 (an example of the "first step"), the chain block 11 (an example of the "first suspension device") is attached to the blades 130A and 130B other than the blade 130C to be attached. The hub 140 and the blades 130A and 130B are rotated in advance so that the mounting position of the hub 140 is directed downward (vertically downward).

[4.2. Step 2]
In step 2 (an example of the "second step"), a chill climber 21 (an example of the "second suspension device") is installed inside the hub 140, and the chill climber 21 and the blade 130C are connected to each other.

[4.3. Step 3]
In step 3 (an example of the "third step"), the blade 130C is lifted by the chill climber 21.

[4.4. Step 4]
In step 4 (an example of the "fourth step"), the blade 130C lifted by the chill climber 21 and the chain block 11 are connected.

[4.5. Step 5]
In step 5 (an example of the "fifth step"), the connection between the chill climber 21 and the blade 130C is released while the chain block 11 and the blade 130C are connected.

[4.6. Step 6]
In step 6 (an example of the “sixth step”), the blade 130C is lifted to the position of the hub 140 by the chain block 11, and the blade 130C is attached to the hub 140.

According to the method of attaching the blade 130, construction of a wind power generation facility and major repair of replacement of the blade 130 can be performed safely and inexpensively as compared with the conventional method. Further, since the blade 130C being lifted is lifted by a multi-point chill climber 21, the rotation of the suspended load in a strong wind can be suppressed. Further, the flange connection between the blade 130C and the hub 140 can be easily connected by adjusting the hole swing when the suspension jig 1 is attached to the blade 130C.

The above-mentioned method of removing the blade 130C and the method of attaching the blade 130C can be adopted for both a wind turbine for onshore wind power generation and a wind turbine for offshore wind power generation.

1 Hanging jig 2 Hanging jig main body 2A, 2B Main body member 3 Hanging plate 3A Insertion hole 4 Hanging piece 4A Insertion hole 11 Chain block 12 Chain block mounting wire 13 Hanging wire 14 Jig receiver 21 Chill climber 22 Chill climber mounting wire 23 Suspended wire 30 Crane 30A Arm 31 Suspended wire 100 Windmill 110 Tower 111 (111A, 111B, 111C) Tower member 120 Nacelle 130 (130A, 130B, 130C) Blade 131 Flange 140 Hub 201 Gondola 202 Gondola wire

Claims (6)

It is a method of removing the blade attached to the hub of the wind turbine and hanging it.
A rotation process in which the hub is rotated so that the tip of the blade to be suspended is directed downward.
A first hanging device is attached to a blade other than the blade that is the hanging target, and the first hanging device and a part of the blade that is the hanging target and whose tip is directed downward are supported from below. The first connection process for connecting the hanging jig to be used, and
A removal step of removing the blade to be suspended from the hub while the first suspension device and the suspension jig are connected.
In a state where the first hanging device and the hanging jig are connected , the second hanging device is installed inside the hub, and the hanging device to which the second hanging device and the first hanging device are connected is connected . The second connection process for connecting the tools and
A release step of disconnecting the first suspension device and the suspension jig while the second suspension device and the suspension jig are connected .
A hanging step of hanging the blade to be hung by the second hanging device via the hanging jig, and a hanging step.
How to remove the blade, characterized by including. The method for removing a blade according to claim 1.
The hanging jig is
The first mounting portion to which the first hanging device is mounted and
The second mounting part to which the second hanging device is mounted and
A contact portion that abuts from below on a part of the blade to be suspended from below when the tip of the blade is directed downward.
Have,
In the first connection step, the first suspension device is attached to the first mounting portion.
In the second connection step, the second suspension device is attached to the second attachment portion.
The method for removing a blade, which comprises removing the first suspension device from the first mounting portion in the release step. The method for removing the blade according to claim 2.
The hanging jig has a ring-shaped hanging jig main body composed of a plurality of main body members.
The hanging jig main body has the contact portion, and the hanging jig main body has the contact portion.
In the first connection step,
The plurality of main body members are joined so as to sandwich the blade, which is the object to be suspended, inside the ring shape.
A method for removing a blade, wherein the contact portion is brought into contact with a flange of the blade for attaching the blade to the hub from below when the tip of the blade is directed downward. The method for removing a blade according to any one of claims 1 to 3 .
The attachment step of attaching the attachment member for attaching the first suspension device to the position where the removed blade was attached when the blade for attaching the first suspension device has been removed is included.
In the first connection step, a method for removing a blade, which comprises attaching the first suspending device to the mounting member when the blade to which the first suspending device is attached has already been removed. A hanging jig used in the method for removing a blade according to any one of claims 1 to 4 . It is a method of attaching the blade that lifts the blade of the wind turbine and attaches it to the hub of the wind turbine.
The first step of attaching the first suspension device to a blade other than the blade to be attached, and
A second suspension device is installed inside the hub, and the second suspension device is connected to the suspension jig that is the attachment target and supports a part of the blade with the tip directed downward from below . 2 steps and
A third step of lifting the blade to be attached by the second hanging device via the hanging jig, and a third step.
The hanging jig connected to the second hanging device, the fourth step of connecting the first hanging device, and the like.
In the state where the first hanging device and the hanging jig are connected, the fifth step of disconnecting the second hanging device and the hanging jig and the fifth step.
The sixth step of lifting the blade to be attached to the position of the hub by the first suspending tool via the hanging jig and attaching the blade to be attached to the hub.
A method of mounting a blade, characterized by including.

Images