Method for aligning impeller of fan installed on wharf

Abstract

The present invention belongs to the technical field of offshore wind turbine installation, and discloses a method for aligning the impeller of a wind turbine installed at a wharf. The alignment method of the present invention includes connecting a towing rope between the wharf and a floating foundation, installing the wind turbine main body on the floating foundation, using a crawler crane on the wharf to hoist the impeller, driving the impeller to move towards the wind turbine main body. The two sides of the connection part of the impeller in the axial direction are respectively the first connection side and the second connection side. The crawler crane drives the first connection side of the impeller to be inserted and connected to the wind turbine main body, and the crawler crane drives the second connection side of the impeller to be inserted and connected to the wind turbine main body, so that the impeller is connected to the wind turbine main body. The present invention uses a crawler crane on the wharf, reduces the platform construction of the wind power installation ship, reduces the input cost, restricts the lateral movement of the floating foundation through the towing rope, reduces the swing amplitude of the floating foundation, uses a connection method from partial to overall, ensures the tight connection between the impeller and the wind turbine main body, improves the alignment efficiency, eliminates potential safety hazards, and saves operation costs.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind turbine installation, and particularly to a method for aligning the impeller of a wind turbine installed at a wharf. Background Art

[0002] Wind power generation is the fastest-growing green energy in the world. While onshore wind farms are being rapidly constructed, adverse factors such as noise pollution and large floor areas have caused wind power developers to gradually shift their targets to the sea, forming offshore wind farms.

[0003] Most of the offshore wind power developed globally is in shallow sea areas. However, with the rapid development of offshore wind power and the continuous reduction of exploitable shallow sea resources, wind farms are gradually developing towards deep sea areas. Generally, in shallow sea areas with a water depth of less than 40 meters, the bases of wind turbine generators in wind farms are usually firmly fixed to the seabed, while in areas with a water depth of more than 50 meters, floating wind turbines are generally used.

[0004] There are approximately two types of hoisting forms for wind turbines in floating wind turbines: onshore hoisting and offshore hoisting. When hoisting offshore, a wind power installation vessel is often used, but it is easily affected by weather conditions. In severe sea conditions, the floating angle of the wind power installation vessel is too large, making it inconvenient for hoisting and installation, and there are significant safety hazards. At the same time, the investment cost of the wind power installation vessel is too high, and when aligning the impeller in the wind turbine, it is difficult to achieve rapid alignment due to excessive floating, which is time-consuming and laborious, increasing the task cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for aligning the impeller of a wind turbine installed at a wharf, achieving efficient and stable docking between the impeller and the wind turbine main body, reducing operation costs, and reducing safety hazards.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A method for aligning the impeller of a wind turbine installed at a wharf, which includes:

[0008] S1. Connect a towing rope between the wharf and the floating foundation, and install the wind turbine main body on the floating foundation;

[0009] S2. Use a crawler crane to hoist the impeller at the wharf and drive the impeller to move towards the wind turbine main body;

[0010] S3. The two sides of the axial direction of the connecting part of the impeller are respectively the first connecting side and the second connecting side, and the crawler crane drives the first connecting side of the impeller to be inserted and connected to the wind turbine main body;

[0011] S4. The crawler crane drives the second connecting side of the impeller to be inserted and connected to the wind turbine main body, so that the impeller is connected to the wind turbine main body.

[0012] Optionally, S1 includes:

[0013] S1.1. The floating foundation includes a first pile, a second pile, and a third pile that are sequentially connected in a ring shape, and the first pile abuts against the dock.

[0014] S1.2. The towing ropes are respectively connected to the second pile and the dock.

[0015] S1.3. The towing ropes are respectively connected to the third pile and the dock.

[0016] S1.4. The main body of the wind turbine is installed on the first pile.

[0017] Optionally, the first pile, the second pile, and the third pile enclose a triangular structure.

[0018] Optionally, S2 includes:

[0019] S2.1. The impeller includes blades and a hub, the blades are inserted into the hub, the crawler crane includes a support part and a lifting part, the support part is placed on the dock, one end of the lifting part is connected to the support part, and the other end is connected to the blade by lifting.

[0020] S2.2. The main body of the wind turbine includes a nacelle, and the lifting part of the crawler crane drives the hub to move towards the nacelle.

[0021] Optionally, S3 includes:

[0022] S3.1. A first flange surface is provided on the nacelle, a second flange surface is provided on the hub, the crawler crane drives the hub to move towards the nacelle at a set angle, and during the movement, the second flange surface and the first flange surface are arranged at an angle.

[0023] Optionally, S3 further includes:

[0024] S3.2. The impeller includes bolts, a plurality of bolts are uniformly arranged on the second flange surface in the circumferential direction, as a connecting part, a plurality of screw holes are provided on the first flange surface, and the bolts on the first connecting side are inserted and connected to the screw holes on the first flange surface.

[0025] Optionally, S4 includes:

[0026] S4.1. The crawler crane drives the bolts on the second connecting side to be inserted and connected to the screw holes on the first flange surface.

[0027] Optionally, S4 further includes:

[0028] S4.2. Apply a pre-tightening force to the bolts until the second flange surface abuts against the first flange surface.

[0029] S4.3. The impeller and the main body of the wind turbine are completely connected.

[0030] Optionally, the first connection side is the side of the connection part facing away from the floating foundation, and the second connection side is the side of the connection part facing the floating foundation.

[0031] Optionally, the towing rope is detachably connected to the dock and the floating foundation.

[0032] Advantages of the present invention:

[0033] The cooperation between the crawler crane on the dock and the floating foundation is used to install the wind turbine, replacing the installation of the wind turbine in the sea by a wind power installation ship, reducing the investment cost. At the same time, the platform construction is reduced, saving the task duration. The towing rope is connected between the floating foundation and the dock, restricting the lateral movement of the floating foundation and reducing the swing amplitude of the floating foundation on the sea water in bad conditions, ensuring the stability of the installation process. The initial connection between the impeller and the main body of the wind turbine is achieved through the crawler crane, thereby reducing the influence of the vertical movement of the floating foundation on their relative positions and avoiding the situation of difficult alignment. The connection method from partial to overall not only ensures the tight connection between the impeller and the main body of the wind turbine, improves the impeller alignment efficiency, but also eliminates potential safety hazards and saves the task cost. Description of the drawings

[0034] Figure 1 is the overall structural schematic diagram of installing the wind turbine impeller on the dock according to the embodiment of the present invention;

[0035] Figure 2 is the top view of installing the wind turbine impeller on the dock according to the embodiment of the present invention;

[0036] Figure 3 is the structural schematic diagram in the preparation state in the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0037] Figure 4 is the structural schematic diagram during the alignment operation in the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0038] Figure 5 is the structural schematic diagram when the alignment is completed in the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0039] Figure 6 is the overall step schematic diagram of the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0040] Figure 7 is the schematic diagram of step S1 of the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0041] Figure 8 is the schematic diagram of step S2 of the impeller alignment method for installing the wind turbine on the dock according to the embodiment of the present invention;

[0042] Figure 9 It is a schematic diagram of step S3 of the impeller alignment method for installing a fan on a dock according to an embodiment of the present invention;

[0043] Figure 10 It is a schematic diagram of step S4 of the impeller alignment method for installing a fan on a dock according to an embodiment of the present invention.

[0044] In the figure:

[0045] 100 - dock; 200 - floating foundation; 201 - first pile; 202 - second pile; 203 - third pile; 300 - towing rope; 400 - crawler crane; 10 - fan main body; 11 - nacelle; 111 - first flange surface; 20 - impeller; 21 - bolt. Detailed implementation manners

[0046] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0047] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0049] In waters with a depth of more than 50 meters, floating wind turbines are often used for wind power generation. When hoisting and installing floating wind turbines at sea, a wind power installation vessel is often used. However, in relatively harsh sea conditions, the floating angle of the wind power installation vessel at sea is too large, making it inconvenient for hoisting and installation, and there are certain safety hazards. The investment cost of the wind power installation vessel is also relatively high. When aligning the wind turbine impeller, the large floating of the sea surface makes it difficult to achieve rapid alignment, which is time-consuming and laborious, increasing the task cost.

[0050] The technical solution of this embodiment will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0051] As Figures 1-10 shown, this embodiment provides a method for aligning the impeller of a wind turbine installed at a wharf, including:

[0052] S1. The towing rope 300 connects the wharf 100 and the floating foundation 200, and the wind turbine main body 10 is installed on the floating foundation 200;

[0053] S2. The crawler crane 400 hoists the impeller 20 on the wharf 100 and drives the impeller 20 to move towards the wind turbine main body 10;

[0054] S3. The two sides of the axial direction of the connecting part of the impeller 20 are respectively the first connecting side and the second connecting side. The crawler crane 400 drives the first connecting side of the impeller 20 to be inserted and connected to the wind turbine main body 10;

[0055] S4. The crawler crane 400 drives the second connecting side of the impeller 20 to be inserted and connected to the wind turbine main body 10, so that the impeller 20 and the wind turbine main body 10 are completely connected.

[0056] In this embodiment, the cooperation of the crawler crane 400 on the wharf 100 and the floating foundation 200 is used to install the wind turbine, replacing the installation of the wind turbine by the wind power installation vessel in the sea. The investment cost is reduced, and at the same time, the platform construction is reduced, saving the task duration. The towing rope 300 is connected between the floating foundation 200 and the wharf 100, restricting the lateral movement of the floating foundation 200 and reducing the swing amplitude of the floating foundation 200 on the sea water in harsh conditions, ensuring the stability of the installation process. Through the crawler crane 400, partial connection between the initial impeller 20 and the wind turbine main body 10 is achieved, thereby reducing the influence of the vertical movement of the floating foundation 200 on their relative positions and causing difficulties in alignment. The connection method from partial to overall not only ensures the tight connection between the impeller 20 and the wind turbine main body 10, improves the alignment efficiency of the impeller 20, but also eliminates safety hazards and saves task costs.

[0057] The specific device and method for aligning the impeller of the wind turbine installed at the wharf in this embodiment will be described below.

[0058] As Figure 1As shown, before aligning the impeller 20 , the floating foundation 200 and the crawler crane 400 are placed at the dock 100 .

[0059] Specifically, the crawler crane 400 is placed on the dock 100, and the floating foundation 200 is floated on the sea surface near the dock 100. The floating foundation 200 is connected to the dock 100 by a traction rope 300, so as to prevent the floating foundation 200 from being far away from the dock 100, reduce the large shaking of the floating foundation 200 under the action of seawater, and further reduce the installation distance of the wind turbine.

[0060] Optionally, the wind turbine includes a wind turbine body 10 and an impeller 20. The crawler crane 400 hoists the impeller 20 on the dock 100, and the wind turbine body 10 is installed on the floating foundation 200. The crawler crane 400 moves to gradually move the impeller 20 toward the wind turbine body 10 until the impeller 20 and the wind turbine body 10 are aligned and installed.

[0061] Alternatively, if Figure 2 As shown, the floating foundation 200 includes a first pile 201, a second pile 202 and a third pile 203 which are sequentially connected in a ring shape.

[0062] Specifically, in this embodiment, the first pile 201 is arranged against the dock 100 , and the second pile 202 and the third pile 203 are respectively connected to the dock 100 through the towing rope 300 , so as to ensure that the floating foundation 200 remains stably floating in the sea area next to the dock 100 .

[0063] Furthermore, the first pile 201, the second pile 202 and the third pile 203 are arranged in a triangular structure to improve the structural stability of the floating foundation 200 and avoid unbalanced tipping or dispersion during floating. Optionally, in this embodiment, two traction ropes 300 connect the second pile 202 to different positions of the dock 100, and another two traction ropes 300 connect the third pile 203 to different positions of the dock 100, and the four traction ropes 300 are symmetrically arranged in pairs.

[0064] Optionally, the traction rope 300 is not bent when connected, thereby improving the connection strength between the second pile 202 and the third pile 203 and the dock 100. The pulling effect of the traction rope 300, in conjunction with the abutment connection between the dock 100 and the first pile 201, limits the lateral floating of the floating foundation 200 relative to the dock 100, thereby improving the stability of the floating foundation 200 during the installation of the wind turbine, and at the same time can reduce the impact of the fluctuation of the sea water on the floating foundation 200 under various sea conditions, thereby improving the installation efficiency.

[0065] Optionally, the fan main body 10 is installed on the first pile 201, close to the dock 100, further reducing the hoisting distance of the impeller 20, reducing the working difficulty of the crawler crane 400, and further improving the alignment efficiency.

[0066] In this embodiment, the towing rope 300 is detachably connected to the dock 100 and the floating foundation 200. The detachable connection is convenient for unified storage of the towing rope 300 and the floating foundation 200, enabling multiple uses, improving utilization rate, and reducing the device usage cost.

[0067] As Figure 3 shown, the impeller 20 is provided with a connecting portion, and the connecting portion is axially divided into a first connecting side and a second connecting side. Optionally, in this embodiment, the first connecting side is the side of the connecting portion facing away from the first pile 201 of the floating foundation 200, and the second connecting side is set as the side of the connecting portion facing the first pile 201.

[0068] During the alignment operation, the crawler crane 400 first drives the first connecting side of the impeller 20 to be inserted and connected to the fan main body 10, and then drives the second connecting side to be inserted and connected to the fan main body 10, realizing partial connection between the impeller 20 and the fan main body 10 and then overall connection. This reduces the vertical floating amplitude of the floating foundation 200, ensures the stability of the alignment process, and also enables the impeller 20 to float synchronously with the floating foundation 200, avoiding the problem that when the second connecting side of the impeller 20 is inserted, the floating foundation 200 is greatly affected by seawater and floats vertically, and the impeller 20 cannot move synchronously with it and is difficult to align.

[0069] Specifically, as Figures 3-5 shown, the impeller 20 includes blades and a hub. Before connecting the impeller 20 and the fan main body 10, the blades are pre-inserted into the hub to complete the overall installation of the impeller 20. The insertion between the blades and the hub is a conventional operation for those skilled in the art and will not be elaborated here.

[0070] Optionally, the crawler crane 400 includes a support portion and a hoisting portion. The support portion includes the base of the crawler crane 400, and the base is placed on the dock 100 and can move on the dock 100 to adjust the distance between the crawler crane 400 and the floating foundation 200, realizing the alignment and installation operation of the fan at the set position.

[0071] Furthermore, one end of the hoisting portion is connected to the support portion, and the other end is configured to hoist and connect the blades. Optionally, the hoisting portion includes a rope and a telescopic mechanism. One end of the rope is hooked and connected to the telescopic mechanism, and the other end is wound around the blades. The telescopic mechanism can adjust the rotation angle and the height of the rope hooking point as needed. Under the connection of the rope, the blades can move relative to the fan main body 10 under the drive of the telescopic mechanism.

[0072] Specifically, the fan main body 10 includes a nacelle 11. The hoisting part of the crawler crane 400 can drive the hub to move towards the nacelle 11, realizing a tight connection between the hub and the nacelle 11, so as to complete the alignment connection between the fan main body 10 and the impeller 20.

[0073] Optionally, a first flange surface 111 is provided on the nacelle 11, and a second flange surface is provided on the hub. When the nacelle 11 and the hub are connected to each other, the first flange surface 111 and the second flange surface are attached to each other, thereby ensuring the connection stability.

[0074] Specifically, as Figure 3 shown, the crawler crane 400 drives the hub to move towards the nacelle 11 at a set angle. During the movement, the second flange surface is arranged at an angle with the first flange surface 111. When the hub moves towards the nacelle 11, the second flange surface moves in a state not parallel to the first flange surface 111, that is, in an inclined state. Specifically, in this embodiment, when the second flange surface moves relative to the first flange surface 111 in an inclined manner, the first connection side is close to the nacelle 11, and the second connection side is far from the nacelle 11, thereby reducing the hoisting difficulty of the crawler crane 400 and being able to reduce the influence of the gravity effect, achieving the purpose of local installation.

[0075] Furthermore, the impeller 20 further includes bolts 21. A plurality of bolts 21 are uniformly arranged on the second flange surface in the circumferential direction. In this embodiment, the plurality of bolts 21 are provided as connection parts. Correspondingly, a plurality of screw holes are provided on the first flange surface 111, and the plurality of bolts 21 can be inserted and connected to the screw holes one by one, thereby realizing the insertion connection between the impeller 20 and the fan main body 10.

[0076] Specifically, as Figure 4 shown, when the first connection side of the impeller 20 is inserted and connected to the nacelle 11 of the fan main body 10, the bolts 21 on the first connection side are inserted and connected to the screw holes on the first flange surface 111, so that the impeller 20 and the fan main body 10 can float synchronously under the action of seawater, and reduce the vertical floating amplitude of the floating foundation 200 and the fan main body 10, ensuring the alignment accuracy and improving the installation efficiency.

[0077] Furthermore, as Figure 5 shown, after the bolts 21 on the first connection side are inserted into the screw holes, the crawler crane 400 is continuously used to drive the bolts 21 on the second connection side to be inserted and connected to the screw holes on the first flange surface 111, so that the bolts on the second flange surface are all inserted into the screw holes on the first flange surface 111.

[0078] Optionally, a pre-tightening force is applied to all the bolts 21 until the second flange surface abuts against the first flange surface 111, completing all the connections between the impeller 20 and the fan main body 10. In this embodiment, applying the pre-tightening force makes the connection strength between the bolts 21 and the screw holes higher, further improving the connection strength between the impeller 20 and the fan main body 10 and reducing safety accidents caused by the detachment of the impeller 20. In other embodiments, methods such as pouring glue can also be selected to improve the connection strength.

[0079] Optionally, as Figure 6 shown, the method for aligning the impeller of the fan installed at the dock in this embodiment is as follows:

[0080] S1. The towing rope 300 connects the dock 100 and the floating foundation 200, and the fan main body 10 is installed on the floating foundation 200;

[0081] S2. The crawler crane 400 hoists the impeller 20 on the dock 100 and drives the impeller 20 to move towards the fan main body 10;

[0082] S3. The two axial sides of the connecting part of the impeller 20 are the first connecting side and the second connecting side respectively. The crawler crane 400 drives the first connecting side of the impeller 20 to be inserted and connected to the fan main body 10;

[0083] S4. The crawler crane 400 drives the second connecting side of the impeller 20 to be inserted and connected to the fan main body 10, so that the impeller 20 and the fan main body 10 are completely connected.

[0084] Specifically, as Figure 7 shown, step S1 includes:

[0085] S1.1. The floating foundation 200 includes a first pile 201, a second pile 202 and a third pile 203 that are sequentially connected in a ring shape. The first pile 201 abuts against the dock 100;

[0086] S1.2. The towing rope 300 is respectively connected to the second pile 202 and the dock 100;

[0087] S1.3. The towing rope 300 is respectively connected to the third pile 203 and the dock 100;

[0088] S1.4. The fan main body 10 is installed on the first pile 201.

[0089] As Figure 8 shown, step S2 includes:

[0090] S2.1. The impeller 20 includes blades and a hub. The blades are inserted into the hub. The crawler crane 400 includes a support part and a hoisting part. The support part is placed on the dock 100, and one end of the hoisting part is connected to the support part and the other end is hoisted and connected to the blades;

[0091] S2.2. The fan main body 10 includes a nacelle 11, and the hoisting part of the crawler crane 400 drives the hub to move towards the nacelle 11.

[0092] As Figure 9 shown, step S3 includes:

[0093] S3.1. A first flange surface 111 is provided on the nacelle 11, and a second flange surface is provided on the hub. The crawler crane 400 drives the hub to move towards the nacelle 11 at a set angle. During the movement, the second flange surface and the first flange surface 111 are arranged at an angle.

[0094] S3.2. The impeller 20 includes bolts 21. A plurality of bolts 21 are evenly arranged circumferentially on the second flange surface. As a connecting part, a plurality of screw holes are provided on the first flange surface 111, and the bolts 21 on the first connecting side are inserted and connected to the screw holes on the first flange surface 111.

[0095] Optionally, as Figure 10 shown, step S4 includes:

[0096] S4.1. The crawler crane 400 drives the bolts 21 on the second connecting side to be inserted and connected to the screw holes on the first flange surface 111.

[0097] S4.2. Apply a pre-tightening force to the bolts 21 until the second flange surface abuts against the first flange surface 111.

[0098] S4.3. The impeller 20 and the fan main body 10 are completely connected.

[0099] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Method for aligning impellers of a fan installed at a dock, characterized in that, include: S1, a traction rope (300) connects the dock (100) and the floating foundation (200), and the wind turbine body (10) is installed on the floating foundation (200); S2, the crawler crane (400) hoists the impeller (20) on the dock (100), and drives the impeller (20) to move toward the fan body (10); S3, two axial sides of the connection portion of the impeller (20) are respectively a first connection side and a second connection side, and the first connection side of the impeller (20) driven by the crawler crane (400) is plug-connected to the fan body (10); S4, the second connection side of the crawler crane (400) driving the impeller (20) is plugged and connected to the fan body (10), so that the impeller (20) and the fan body (10) are connected; The first connection side is a side of the connection part facing away from the floating foundation (200), and the second connection side is a side of the connection part facing the floating foundation (200); S3 includes: S3.

1. A first flange surface (111) is provided on the nacelle (11), and a second flange surface is provided on the wheel hub. The crawler crane (400) drives the wheel hub to move toward the nacelle (11) at a set angle. During the movement, the second flange surface and the first flange surface (111) are arranged at an angle. S3 also includes: S3.2, the impeller (20) comprises bolts (21), a plurality of bolts (21) are evenly arranged on the second flange surface along the circumferential direction as a connection portion, a plurality of screw holes are arranged on the first flange surface (111), and the bolts (21) on the first connection side are inserted and connected to the screw holes on the first flange surface (111); S4 includes: S4.

1. The crawler crane (400) drives the bolts (21) on the second connection side to be inserted and connected to the screw holes on the first flange surface (111).

2. The method for aligning impellers of a fan installed at a dock according to claim 1, characterized in that, S1 includes: S1.

1. The floating foundation (200) includes a first pile (201), a second pile (202), and a third pile (203) connected in sequence in a ring shape, and the first pile (201) abuts against the dock (100); S1.2, the traction rope (300) is respectively connected to the second pile (202) and the dock (100); S1.3, the traction rope (300) is connected to the third pile (203) and the dock (100) respectively; S1.

4. The fan body (10) is installed on the first pile (201).

3. The method for aligning impellers of a fan installed at a dock according to claim 2, characterized in that, The first pile (201), the second pile (202) and the third pile (203) are arranged to form a triangular structure.

4. The method for aligning impellers of a fan installed at a dock according to claim 1, characterized in that S2 include: S2.1, the impeller (20) comprises blades and a hub, the blades are plugged into the hub, the crawler crane (400) comprises a support portion and a hoisting portion, the support portion is placed on the dock (100), one end of the hoisting portion is connected to the support portion, and the other end is hoisted and connected to the blades; S2.

2. The wind turbine body (10) includes a nacelle (11), and the hoisting portion of the crawler crane (400) drives the wheel hub to move toward the nacelle (11).

5. The method for aligning impellers of a fan installed at a dock according to claim 4, characterized in that, S4 also includes: S4.

2. Apply a pre-tightening force to the bolt (21) until the second flange surface abuts against the first flange surface (111); S4.

3. The impeller (20) is connected to the fan body (10).

6. The method for aligning impellers of a fan installed at a dock according to any one of claims 1-5, characterized in that, The traction rope (300) is detachably connected to the dock (100) and the floating foundation (200).

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