A fan blade horizontal installation auxiliary docking device and operation method

Abstract

The present invention provides a horizontal installation auxiliary docking device for wind turbine blades and an operating method, comprising a clamp assembly, a self-locking leg assembly, a blade centering assembly and a control assembly; the blade centering assembly comprises a centering bearing base and a blade centering claw, the blade centering claw is slidably and rotatably arranged on the centering bearing base; the clamp assembly comprises a clamp fixed arm and a clamp movable arm, the two ends of the clamp fixed arm are respectively a first opening end and a second opening end, the two ends of the clamp movable arm are respectively a third opening end and a fourth opening end; the first opening end is detachably arranged at the third opening end, and the fourth opening end is movably arranged at the second opening end; the clamp fixed arm is arranged on the centering bearing base; the self-locking leg assembly comprises a self-locking leg, the self-locking leg is fixedly arranged on the centering bearing base; the control assembly is arranged on the clamp fixed arm. The present invention improves the installation efficiency of the blades and solves the problem of difficulty in installation and disassembly of other blade docking auxiliary devices.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and in particular to a horizontal installation auxiliary docking device for fan blades and an operating method thereof. Background Art

[0002] According to statistics, the installation cost of offshore wind turbines accounts for about 20% of the total cost. With the rapid development of offshore wind power in recent years and the arrival of the era of wind power parity, the improvement of offshore wind turbine installation technology has become an important part of reducing total costs.

[0003] The hoisting of offshore wind turbines usually adopts the split hoisting method, that is, the wind turbine parts (such as tower, nacelle, hub and blades, etc.) are preassembled into pre-assembled parts, and then transported to the installation site for hoisting in sequence. In the commonly used assembly method, due to the special slender shape of the blades, it is not conducive to transportation and hoisting to fully assemble the three blades and the hub in advance. Therefore, the hub and nacelle assembly method or the "rabbit ear" assembly method of two blades and the hub is more common, and the remaining blades are hoisted by single blades and connected to the hub.

[0004] During the single-blade hoisting process, a rigid arm structure hoist is usually used to fix the blade, and then a crane lifts the hoist together with the blade to the installation height. The position and posture of the blade are continuously adjusted by moving the crane, manually pulling the cable, etc., and finally the root bolt of the blade is inserted into the bolt hole of the hub interface and locked.

[0005] There are mainly two ways to install blades: horizontal lifting and vertical lifting, among which horizontal lifting is the most widely used. In actual applications, affected by the wind and waves in the installation sea area, the suspended blades and the closed tower, nacelle, and hub structure will shake, which will make it difficult to dock the blades and hub or even fail to dock and damage the blade root bolts. Therefore, the lifting process is usually selected during a period of time with less wind and waves, and such a sea condition window period is usually short. In addition, during the process of lifting the blades, the crane's own movement and rotation may not be consistent with the required movement direction of the blades. Therefore, the process of moving the blades to dock the hub requires multiple fine-tuning of the crane's position and angle, which seriously affects the lifting efficiency. An installation ship with excellent performance can only lift about 40 offshore wind turbines a year, which is inefficient and costly.

[0006] The patent with publication number CN107387329A discloses a hub docking device suitable for installing a single blade of an offshore wind turbine, including a circular snap ring, a spring damper, a force actor, a buffer plate, a controller and an electric motor; the circular snap ring is a rigid structure, surrounding the hub, and is connected to the buffer plate through a spring damper and a force actor; the buffer plate is made of a flexible composite material, and the roots of multiple buffer plates are hinged to an outer edge of the hub through a connecting hinge and can rotate around their roots; the force actor is driven by a controller and an electric motor located in the cabin. There are multiple flange holes on the blade and the hub, and after the two are docked, they are fixed by bolts. The installation and debugging of the hub docking device of the present invention can be completed when the onshore cabin assembly is installed. The components of the hub docking device: circular snap ring, buffer plate, force actor, spring damper, controller and electric motor are all mature commercial products and are easy to construct. The above invention uses a spring and a buffer plate structure, which gradually closes when the blade and the hub are docked, thereby guiding the blade root to align with the hub. However, this design is difficult to install and disassemble, and the disassembly method is not explained. In addition, the docking process still requires human assistance to stabilize the movement of the blade.

[0007] The patent with application number CN109837901A discloses a pile gripper for a single pile foundation of an offshore wind turbine, comprising a pile gripper bracket, a gripper ring assembly and a sliding mechanism; the gripper ring assembly is mounted on the pile gripper bracket; the pile gripper bracket is arranged on the sliding mechanism; the sliding mechanism comprises a sliding rail, a front-and-rear moving device and a left-and-right moving device; the sliding rail is mounted on the hull; a plurality of front-and-rear positioning holes are arranged on the sliding rail; the front-and-rear moving device comprises a front-and-rear sliding cylinder, a first front-and-rear pulley group, a first positioning group, a second front-and-rear pulley group and a moving frame; the first front-and-rear pulley group is mounted on one end of the bottom of the moving frame, the cylinder barrel of the front-and-rear sliding cylinder is connected to the first front-and-rear pulley group, the piston rod of the front-and-rear sliding cylinder is connected to the first positioning group, and the second front-and-rear pulley group is mounted on the other end of the bottom of the moving frame; the left-and-right moving device is arranged on the moving frame and connected to the pile gripper bracket. The pile gripper of this patent moves smoothly during the moving process. The above invention adopts a double-layer clamping structure and a hydraulic clamping mechanism, and sets two mutually perpendicular slide rails to realize two-way translation of the pile gripper, thereby effectively controlling the movement of the single pile foundation to be installed and ensuring the smooth recovery of the pile gripper. However, the device is large in size and weight, the two movable arms inside the pile gripper have limited effectiveness, and the movable function seems redundant. Summary of the invention

[0008] In view of the defects in the prior art, an object of the present invention is to provide a horizontal installation auxiliary docking device for fan blades and an operating method.

[0009] According to the present invention, a horizontal installation auxiliary docking device for fan blades includes a clamp assembly, a self-locking leg assembly, a blade centering assembly and a control assembly;

[0010] The blade centering assembly comprises a centering bearing base and a blade centering claw, and the blade centering claw is slidably and rotatably arranged on the centering bearing base;

[0011] The clamp assembly comprises a clamp fixed arm and a clamp movable arm of a closed-loop abutting mounting body, the two ends of the clamp fixed arm are respectively a first opening end and a second opening end, and the two ends of the clamp movable arm are respectively a third opening end and a fourth opening end; the first opening end is detachably arranged at the third opening end, and the fourth opening end is movably arranged at the second opening end; a side wall of the clamp fixed arm away from the clamp movable arm is fixedly arranged on the centering bearing base;

[0012] The self-locking leg assembly comprises a self-locking leg for abutting against the mounting body, and one end of the self-locking leg away from the abutting end thereof is fixedly arranged on the centering bearing base;

[0013] The control component is arranged on a side wall of the clamp fixing arm, and the control component is used to control the operation of the clamp component, the self-locking leg component and the blade centering component.

[0014] Preferably, a slide rail base is slidably arranged on the centering bearing base, a rotating base is rotatably arranged on the slide rail base, and the blade centering claw is slidably arranged on the rotating base along a direction perpendicular to the sliding direction of the slide rail base.

[0015] Preferably, a radial slide rail is provided on the centering bearing base, and the slide rail base is slidably arranged on the centering bearing base via the radial slide rail.

[0016] Preferably, a transverse base is fixedly provided on the blade centering claw, a transverse slide rail is provided on the rotating base, and the transverse base is slidably provided on the rotating base via the transverse slide rail.

[0017] Preferably, a fixed arm tower anti-slip member is provided on the clamp fixed arm, and the fixed arm tower anti-slip member is located between the first opening end and the second opening end;

[0018] The movable arm of the clamp is provided with a movable arm tower anti-slip part, and the movable arm tower anti-slip part is arranged between the third opening end and the fourth opening end.

[0019] Preferably, the abutting end of the self-locking leg is provided with a self-locking leg anti-slip piece for abutting against the mounting body.

[0020] Preferably, the third open end of the movable arm of the clamp is hinged to the first open end of the fixed arm of the clamp by a hydraulic pin.

[0021] Preferably, the fourth open end of the movable arm of the clamp is hinged to the second open end of the fixed arm of the clamp by a common pin, and a telescopic cylinder assembly is provided;

[0022] The telescopic cylinder assembly is used to realize the rotation of the movable arm of the clamp on the fixed arm of the clamp.

[0023] Preferably, the telescopic cylinder assembly comprises a hoop cylinder base, a hoop cylinder, a hoop hydraulic rod base and a hoop hydraulic rod;

[0024] The clamp oil cylinder base is fixedly arranged at the second open end of the clamp fixing arm, and the clamp oil cylinder is arranged on the clamp oil cylinder base;

[0025] The clamp hydraulic rod base is fixedly arranged at the fourth open end of the clamp movable arm; one end of the clamp hydraulic rod is arranged on the clamp oil cylinder, and one end of the clamp hydraulic rod away from the clamp oil cylinder is arranged on the clamp hydraulic rod base.

[0026] The present invention also provides an operating method based on the above-mentioned fan blade horizontal installation auxiliary docking device, comprising the following steps:

[0027] Step 1: During the lifting phase, fix the lifting rope under the centering bearing base and lift it to the installation height by crane; adjust the clamp assembly so that the movable arm of the clamp opens outward to a certain angle; move the crane and translate the device close to the tower. The tower can enter the clamp assembly from the clamp opening until the fixed arm tower anti-slip part contacts the tower, and tighten the movable arm of the clamp to close the clamp assembly;

[0028] Step 2: During the adjustment phase, the hub is rotated so that the normal direction of the hub-blade interface faces the horizontal direction; the nacelle is rotated so that the center line of the blade interface facing the horizontal direction intersects with the center axis of the device within the adjustable range of the radial slide rail; the blade centering mechanism is roughly adjusted, mainly including radial adjustment of the slide rail base, angle adjustment of the rotating base, lateral adjustment of the lateral displacement base and vertical adjustment of the blade centering claw, so that the plane of the blade centering claw is parallel to the plane of the hub interface, and the center of the blade centering claw is basically aligned with the center of the hub interface;

[0029] Step 3: During the docking stage, use a special hoist for horizontal lifting to clamp and lift the blade, adjust the posture of the blade until the blade root bolt disk is facing horizontally, and lift the blade to the installation height; move the crane so that the root of the blade is close to the blade centering claw, and the crane slowly lowers the height of the blade, and puts the cylindrical transition section of the blade root into the blade centering claw; the operator aligns the bolt at the root of the blade with the corresponding bolt hole through fine adjustment; start the drive wheel, push the blade close to the hub, and insert the bolt at the root of the blade into the corresponding bolt hole; close the drive wheel and lock the bolt; after the locking is completed, if the next blade needs to be installed, start the fan hub turning mechanism, rotate the hub, and move the installed blade away from the top of the blade centering claw. The hub rotates clockwise to remove the blade. Similarly, if the blade is installed in the other direction, it rotates counterclockwise. At the same time, the next blade docking port also rotates to face the central axis of the device, that is, facing the blade centering claw that has been adjusted and aligned, and repeat the above blade installation steps until all blades are installed;

[0030] Step 4: During the recovery phase, rotate the hub and remove the blade alignment claws for the last installed blade; move the crane to lower the sling of the auxiliary docking device for horizontal installation of wind turbine blades onto the device, and the workers on the device will fix the sling; the crane slowly retracts the rope until the rope is straightened and bears the full gravity of the device; the movable arm of the clamp is opened outward to a certain angle so that the tower can be moved away from the opening of the clamp; move the crane to lift the device away from the tower and recover it.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention adopts the structure of the clamp device and the self-locking leg. The device can be fixed on the tower using the self-locking principle, can bear part of the weight of the blade, and does not require complicated operations for installation and removal. The crane can be fixed by loosening the sling and can leave the tower by lifting, which improves the installation efficiency and solves the problem of difficulty in installation and removal of other blade docking auxiliary devices.

[0033] 2. The present invention adopts a slide rail mechanism, a rotating mechanism and a blade centering claw mechanism to keep the blade to be docked and the hub relatively still, thus avoiding the problem of violent relative movement of the two due to the influence of the environment. The blade root and the hub docking interface can be adjusted to align the center, and the blade is driven to be inserted into the docking interface and locked, thus solving the docking difficulty problem caused by the relative movement of the blade and the hub and the difficulty of crane movement during the blade hoisting process;

[0034] 3. The present invention provides an operating method for the above-mentioned wind turbine blade horizontal installation auxiliary device, which includes a lifting stage, an adjustment stage, a docking stage and a recovery stage, which can realize the smooth and precise completion of the blade horizontal lifting process, greatly improve the lifting efficiency of single blades of offshore wind turbines, broaden the operation window period of the single blade lifting process, reduce the installation cost and environmental requirements of offshore wind turbines, and solve the problems of short installation window period, low precision and high cost of offshore wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 is a side view of the present invention;

[0038] Figure 3 It is a front view of the device of the present invention;

[0039] Figure 4 A top view of the device of the present invention;

[0040] Figure 5 It is a force analysis diagram of the present invention;

[0041] Figure 6 It is a diagram of the installation steps in the lifting stage of the operation method of the present invention;

[0042] Figure 7 A diagram of the installation steps of the adjustment stage of the operating method of the present invention;

[0043] Figure 8 It is a diagram of the installation steps in the docking stage of the operation method of the present invention;

[0044] Fig. 9 FIG. 1 is a diagram of the installation steps for the recovery phase of the operating method of the present invention.

[0045] The figure shows:

[0046] Clamp assembly 1

[0047] Clamp fixed arm 101

[0048] Hoop movable arm 102

[0049] Self-locking leg assembly 2

[0050] Self-locking leg 201

[0051] Blade centering assembly 3

[0052] Centering bearing base 301

[0053] Blade centering claw 302

[0054] Control Component 4

[0055] Equipment box 401

[0056] Control box 402

[0057] First open end 5

[0058] Second open end 6

[0059] The third opening end 7

[0060] Fourth opening end 8

[0061] Slide base 9

[0062] Rotating base 10

[0063] Radial slide 11

[0064] Transverse base 12

[0065] Transverse slide 13

[0066] Fixed arm tower anti-slip parts 14

[0067] Anti-skid parts of movable arm tower 15

[0068] Self-locking anti-slip parts 16

[0069] Hydraulic pin 17

[0070] Ordinary pin 18

[0071] Telescopic cylinder assembly 19

[0072] Hoop cylinder base 1901

[0073] Clamp cylinder 1902

[0074] Clamp hydraulic rod 1903

[0075] Clamp hydraulic rod base 1904

[0076] Tower 20

[0077] Cabin 21

[0078] Wheel 22

[0079] Blade 23

[0080] Hydraulic pin 24

[0081] Drive wheel 25

[0082] Centering claw cylinder 26 DETAILED DESCRIPTION

[0083] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0084] The present invention provides a horizontal installation auxiliary docking device for fan blades, comprising a clamp assembly 1, a self-locking leg assembly 2, a blade centering assembly 3 and a control assembly 4.

[0085] like Figure 1 and Figure 2 As shown, the clamp assembly 1 includes a clamp fixed arm 101 and a clamp movable arm 102 of a closed-loop abutting mounting body, the two ends of the clamp fixed arm 101 are respectively a first opening end 5 and a second opening end 6, and the two ends of the clamp movable arm 102 are respectively a third opening end 7 and a fourth opening end 8; the first opening end 5 is detachably arranged at the third opening end 7, and the fourth opening end 8 is movably arranged at the second opening end 6; a side wall of the clamp fixed arm 101 away from the clamp movable arm 102 is fixedly arranged on a centering bearing base 301.

[0086] The third open end 7 of the clamp movable arm 102 is hinged to the first open end 5 of the clamp fixed arm 101 by a retractable hydraulic pin 17, and the hydraulic pin 17 can be retracted into the hydraulic pin 24 when the clamp is opened. The fourth open end 8 of the clamp movable arm 102 is hinged to the second open end 6 of the clamp fixed arm 101 by a common pin 18, and a telescopic cylinder assembly 19 is provided, and the telescopic cylinder assembly 19 is used to realize the rotation of the clamp movable arm 102 on the clamp fixed arm 101.

[0087] The telescopic cylinder assembly 19 includes a hoop cylinder base 1901, a hoop cylinder 1902, a hoop hydraulic rod base 1904 and a hoop hydraulic rod 1903. The hoop cylinder base 1901 is fixedly arranged at the second open end 6 of the hoop fixed arm 101, the hoop cylinder 1902 is arranged on the hoop cylinder base 1901, the hoop hydraulic rod base 1904 is fixedly arranged at the fourth open end 8 of the hoop movable arm 102, one end of the hoop hydraulic rod 1903 is arranged on the hoop cylinder 1902, and the end of the hoop hydraulic rod 1903 away from the hoop cylinder 1902 is arranged on the hoop hydraulic rod base 1904. The hoop cylinder 1902 can push out or retract the hoop hydraulic rod 1903, thereby opening or closing the hoop movable arm 102.

[0088] The fixed arm 101 of the clamp is provided with a fixed arm tower anti-skid part 14, and the fixed arm tower 20 anti-skid part 14 is located between the first opening end 5 and the second opening end 6. The movable arm 102 of the clamp is provided with a movable arm tower anti-skid part 15, and the movable arm tower anti-skid part 15 is arranged between the third opening end 7 and the fourth opening end 8. In a preferred embodiment, the fixed arm tower anti-skid part 14 adopts an anti-skid pad, and the movable arm tower anti-skid part 15 adopts an anti-skid pad, and the two anti-skid pads are respectively located on the inner side of the clamp and arranged relatively on the central axis. A variety of types can be selected for the shape and material of the anti-skid pad. In this embodiment, an arc-shaped anti-skid pad adapted to the shape of the tower 20 is used, and the anti-skid material is preferably a rubber material, which can provide sufficient friction and ensure that its contact area with the surface of the tower 20 is large enough, so that the pressure it brings will not damage the structure of the tower 20.

[0089] The blade centering assembly 3 includes a centering bearing base 301 and a blade centering claw 302. The blade centering claw 302 is slidably and rotatably arranged on the centering bearing base 301. A slide rail base 9 is slidably arranged on the centering bearing base 301, and a rotating base 10 is rotatably arranged on the slide rail base 9. The blade centering claw 302 is slidably arranged on the rotating base 10 in a direction perpendicular to the sliding direction of the slide rail base 9. A radial slide rail 11 is arranged on the centering bearing base 301, and the slide rail base 9 is slidably arranged on the centering bearing base 301 through the radial slide rail 11. A transverse base 12 is fixedly arranged on the blade centering claw 302, and a transverse slide rail 13 is arranged on the rotating base 10, and the transverse base 12 is slidably arranged on the rotating base 10 through the transverse slide rail 13. The centering bearing base 301 is integrated with the clamp fixed arm 101 to form the main body of the invention device.

[0090] In a preferred example, the slide rail base 9 can move radially along the radial slide rail 11 (radial refers to a circle with the center point of the clamp as the center, that is, it is arranged and moved along the diameter direction for the target tower 20). The rotating base 10 is arranged at the center of the slide rail base 9, and its function is to drive the structure it carries to rotate around the central axis of the rotating base 10. A general slewing crane base can be used. The transverse slide rail 13 is arranged on the rotating base 10. The direction of the slide rail should be parallel to the claw plane of the blade centering claw 302, so as to play a role in laterally adjusting the root position of the blade 23 during the subsequent blade 23 centering operation. The transverse base 12 can move on the transverse slide rail 13, thereby driving the blade centering claw 302 arranged thereon to translate laterally.

[0091] like Figure 3 and Figure 4As shown, the blade centering claw 302 is in the shape of a clamp, and its inner contour is close to a circular arc to adapt to the cylindrical shape of the root of the blade 23. The clamp-shaped opening of the claw can be appropriately designed to be larger, and a buffer pad can be set at the sharp part to increase the tolerance range when the blade 23 is lifted and placed on the claw, and to prevent impact damage. The blade centering claw 302 is connected to the transverse base 12 by the centering claw cylinder 26. The blade centering claw 302 is pushed out and retracted by the centering claw cylinder 26, so that the blade centering claw 302 can be translated in the vertical direction. A plurality of driving wheels 25 are arranged on the blade centering claw 302, and the friction between the driving wheels 25 and the blade 23 can be used to push the blade 23 on the claw along the normal direction of the claw plane. In this embodiment, three driving wheels 25 are arranged, which are respectively located at the left, middle and right positions of the blade centering claw 302, as shown in FIG. Figure 3 and Figure 4 As shown, the material of the driving wheel 25 can be selected to be rubber material.

[0092] The slide rail structure involved in the above mechanism can also be driven by a pulley type, a hydraulic stepping type or a gear rack type, and the type adopted is not limited. The purpose is to ensure that the structure above it can move and stay along the slide rail stably and accurately. In addition, buffer pads can be arranged at the parts of the device structure that may touch the tower 20, such as the side of the self-locking leg 201, the outside of the clamp fixed arm 101 and the clamp movable arm 102, to prevent the device from colliding with the tower 20 during the lifting and recovery process, causing damage to both.

[0093] The self-locking leg assembly 2 includes a self-locking leg 201 for abutting against the mounting body, and one end of the self-locking leg 201 away from its abutting end is fixedly arranged on the centering bearing base 301. The abutting end of the self-locking leg 201 is provided with a self-locking leg anti-slip member 16 for abutting against the mounting body. In a preferred embodiment, the self-locking leg 201 is a long strip-shaped rigid structure, and the self-locking leg anti-slip member 16 can adopt the same design as the clamp anti-slip pad, and the anti-slip material is preferably a rubber material.

[0094] In order to ensure that the device can be fixed on the tower 20 due to the self-locking effect, there are certain requirements for the center of gravity position of the device and the angle θ between the self-locking leg 201 and the centering bearing base 301: Figure 5 As shown, according to the force analysis of the device, when the X-direction distance l between the center of gravity of the device and the tower 20 satisfies When (where μ is the friction coefficient between the anti-slip pad and the tower 20, λ is the safety factor, λ≥1), the device can be self-locking; in particular, if the distance l between the center of gravity of the device and the surface of the tower 20 at the corresponding height is maintained at more than half of the total length L of the centering mechanism bearing base, that is, It is sufficient to ensure that the angle θ between the self-locking leg 201 and the centering mechanism bearing base is smaller than the friction angle between the anti-slip pad and the tower 20, that is, θ≤arctan(μ). This judgment method is more suitable for practical engineering applications.

[0095] The control assembly 4 is arranged on a side wall of the clamp fixing arm 101, and is used to control the operation of the clamp assembly 1, the self-locking leg assembly 2 and the blade centering assembly 3. The control assembly 4 includes an equipment box 401 and a control box 402, wherein the equipment box 401 includes necessary equipment for the operation of the mechanism such as a power supply and a hydraulic pump, and the control box 402 includes a main control computer, a signal transceiver, a manual controller, an emergency stop device and other equipment, which are used for the operator to control the operation of various slide rails and rotating mechanisms of the blade centering mechanism on site or remotely through a remote control.

[0096] By adopting the structure of the clamp assembly 1 and the self-locking leg 201, the device can be fixed on the tower 20 using the self-locking principle, can bear part of the weight of the blade 23, and does not require complicated operations for installation and removal. The crane can fix it by loosening the sling and leave the tower 20 by lifting, thereby improving the installation efficiency and solving the problem of difficult installation and disassembly of other blade docking auxiliary devices.

[0097] The present invention also provides an operating method for the auxiliary docking device for horizontal installation of the wind turbine blade 23. After the wind turbine tower 20, the nacelle 21 and the hub 22 are hoisted, the single blade 23 is prepared for horizontal hoisting. The process of horizontal installation of the blade 23 using the auxiliary device of the present invention can be divided into a hoisting stage, an adjustment stage, a docking stage, a locking stage and a recovery stage. The specific operating steps are as follows:

[0098] Step 1, such as Figure 6 As shown, the lifting phase:

[0099] Step 101, fix the lifting rope under the centering mechanism bearing base 300, and lift it to the installation height by a crane. The installation height is defined as the height that can ensure that the blade centering claw 302 can lift the blade 23, and its error shall not exceed the vertical direction (Z direction) adjustment range of the blade centering claw 302.

[0100] Step 102, the hydraulic pin shaft 17 is retracted into the hydraulic pin 24, the clamp cylinder 1902 retracts the clamp hydraulic rod 1903, and the clamp movable arm 102 is opened outward to a certain angle. The crane is moved to translate the device closer to the tower 20, and the tower 20 can enter the clamp from the clamp opening until the fixed arm tower anti-slip member 14 contacts the tower 20.

[0101] Step 103, the hoop cylinder 1902 pushes out the hoop hydraulic rod 1903, and the hoop movable arm 102 closes the hoop inward. The hydraulic pin shaft 17 is pushed out from the hydraulic pin 24, the hoop fixed arm 101 is connected to the hoop movable arm 102, and the hoop assembly 1 is closed. At this time, the movable arm tower anti-slip part 15 and the self-locking leg anti-slip part 16 are also in contact with the tower 20. After the hoop assembly 1 is closed, the lifting rope can be slowly loosened, and the device is fixed on the tower 20 due to the self-locking effect.

[0102] Step 2, such as Figure 7 As shown, the adjustment phase:

[0103] Step 201, rotating the hub 22 so that the normal direction of the hub-blade interface faces the horizontal direction. This step is the same as the general blade horizontal lifting process, that is, ensuring that the subsequent blade 23 can be inserted into the hub 22 in the horizontal direction.

[0104] Step 202, rotate the nacelle 21 so that the center line of the blade 23 facing horizontal intersects with the center axis of the device within the adjustable range of the radial slide rail 11, such as Figure 7 As shown in the top view on the right side, the blade centering claw 302 can move on the radial slide rail 11 mechanism 301 as a whole, so the purpose of this step is to ensure that the subsequent hoisting blade 23 can fall into the blade centering claw 302, thereby achieving auxiliary docking.

[0105] Step 203, coarse adjustment of the blade centering mechanism, mainly includes four parts: radial adjustment of the slide rail base 9, angle adjustment of the rotating base 10, lateral adjustment of the traverse base 12 and vertical adjustment of the blade centering claw 302. The four devices are adjusted in no particular order, and ultimately the plane of the blade centering claw 302 is parallel to the plane of the hub 22 interface, and the center of the blade centering claw 302 is basically aligned with the center of the hub 22 interface, such as Figure 7 and Figure 8 Shown in top view on the right.

[0106] Step 3, such as Figure 8 As shown, the docking phase:

[0107] Step 301, the preparation work for blade hoisting is the same as the general single blade hoisting process. Use a special hoist for horizontal hoisting to clamp and hoist the blade 23, and adjust the posture of the blade 23 so that the blade root bolt plate is facing horizontal. Hoist the blade 23 to the installation height, that is, the height of the blade root bolt is slightly higher than the height of the blade centering claw 302. Move the crane so that the root of the blade 23 is close to the blade centering claw 302.

[0108] In step 302, the crane slowly lowers the height of the blade 23, places the cylindrical transition section at the root of the blade 23 into the blade centering claw 302, and makes a certain contact pressure between it and the driving wheel 25, that is, part of the weight of the blade 23 is borne by the blade centering claw 302. Due to the self-locking leg 201 structure adopted by the device of the invention, the weight of the blade 23 borne will not cause the device to slip due to the self-locking effect.

[0109] Step 303, after the blade 23 is properly placed, the crane does not move. Figure 8As shown, there is still a distance between the root of the blade 23 and the docking interface of the hub 22, and the bolt plane of the root of the blade 23 is parallel to the docking surface of the hub 22. The operator can observe whether the root bolts of the blade 23 are aligned with the corresponding bolt holes by naked eyes or cameras at the hub 22 or on the invention device, on the deck or at the remote command center. If there is a gap, the remote control or the control device on the device can be used to fine-tune the angle of the rotating base 10, the position of the lateral base 12 and the vertical position of the blade centering claw 302. If necessary, the pitch device of the wind turbine hub docking interface can also be adjusted until the root bolts of the blade 23 are aligned with the corresponding bolt holes.

[0110] Step 304, after the root bolts of the blade 23 are aligned with the corresponding bolt holes, the driving wheel 25 is started to push the blade 23 close to the hub 22, and the root bolts of the blade 23 are inserted into the corresponding bolt holes. Then the driving wheel 25 is closed and the bolts are tightened by a worker.

[0111] Step 305: After the locking is completed, if the next blade 23 needs to be installed, the fan hub 22 turning mechanism is started to rotate the hub 22 to remove the installed blade 23 from above the blade centering claw 302. Fig. 9 The hub 22 is shown rotating clockwise to remove the blade 23. Similarly, if the blade 23 is installed in another direction, it rotates counterclockwise. At the same time, the next blade 23 docking port is also rotated to face the center axis of the device, that is, facing the blade centering claw 302 that has been adjusted and aligned. For a general three-blade 23 fan, the hub 22 can be rotated 120°. Repeat steps 301-304 until all blades 23 are installed.

[0112] Step 4, such as Fig. 9 As shown, the recycling phase:

[0113] Step 401, first rotate the hub 22, and move the last installed blade 23 away from the blade centering claw 302 to prevent the fan blade 23 from being damaged during the device recovery process.

[0114] Step 402, move the crane, drop the sling of the invention device onto the device, and the worker on the device fixes the sling. The crane slowly retracts the rope until the rope is straightened and bears the full weight of the device.

[0115] Step 403, the hydraulic pin shaft 17 is retracted into the hydraulic pin 24, the clamp cylinder 1902 retracts the clamp hydraulic rod 1903, and the clamp movable arm 102 is opened outward to a certain angle, so that the tower 20 can be moved away from the clamp opening. The crane is moved to lift the device away from the tower 20 and recover it for the next wind turbine blade 23 to be hoisted.

[0116] This operation method can realize the smooth and precise completion of the horizontal lifting process of the blades, greatly improves the lifting efficiency of single blades of offshore wind turbines, broadens the operation window period of the single blade lifting process, reduces the installation cost and environmental requirements of offshore wind turbines, and solves the problems of short installation window period, low precision and high cost of offshore wind turbines.

[0117] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0118] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A horizontal installation auxiliary docking device for fan blades, characterized in that: It comprises a hoop assembly (1), a self-locking leg assembly (2), a blade centering assembly (3) and a control assembly (4); The blade centering assembly (3) comprises a centering bearing base (301) and a blade centering claw (302), wherein the blade centering claw (302) is slidably and rotatably arranged on the centering bearing base (301); The clamp assembly (1) comprises a clamp fixing arm (101) and a clamp movable arm (102) of a closed-loop abutting mounting body, the two ends of the clamp fixing arm (101) are respectively a first opening end (5) and a second opening end (6), and the two ends of the clamp movable arm (102) are respectively a third opening end (7) and a fourth opening end (8); the first opening end (5) is detachably arranged at the third opening end (7), and the fourth opening end (8) is movably arranged at the second opening end (6); a side wall of the clamp fixing arm (101) away from the clamp movable arm (102) is fixedly arranged on the centering bearing base (301); The self-locking leg (assembly (2) comprises a self-locking leg (201) for abutting against the mounting body, and one end of the self-locking leg (201) away from its abutting end is fixedly arranged on the centering bearing base (301); The control component (4) is arranged on a side wall of the clamp fixing arm (101), and the control component (4) is used to control the operation of the clamp component (1), the self-locking leg component (2) and the blade centering component (3); A slide rail base (9) is slidably arranged on the centering bearing base (301), a rotating base (10) is rotatably arranged on the slide rail base (9), and the blade centering claw (302) is slidably arranged on the rotating base (10) in a direction perpendicular to the sliding direction of the slide rail base (9); The centering bearing base (301) is provided with a radial slide rail (11), and the slide rail base (9) is slidably arranged on the centering bearing base (301) via the radial slide rail (11); A transverse base (12) is fixedly arranged on the blade centering claw (302), a transverse slide rail (13) is arranged on the rotating base (10), and the transverse base (12) is slidably arranged on the rotating base (10) via the transverse slide rail (13).

2. The horizontal installation auxiliary docking device for fan blades according to claim 1 is characterized in that: The clamp fixing arm (101) is provided with a fixing arm tower anti-slip component (14), and the fixing arm tower anti-slip component (14) is located between the first opening end (5) and the second opening end (6); The hoop movable arm (102) is provided with a movable arm tower anti-slip component (15), and the movable arm tower anti-slip component (15) is arranged between the third opening end (7) and the fourth opening end (8).

3. The horizontal installation auxiliary docking device for fan blades according to claim 1 is characterized in that: The abutting end of the self-locking leg (201) is provided with a self-locking leg anti-slip piece (16) for abutting against a mounting body.

4. The horizontal installation auxiliary docking device for fan blades according to claim 1, characterized in that: The third open end (7) of the movable clamp arm (102) and the first open end (5) of the fixed clamp arm (101) are hingedly connected by a hydraulic pin shaft (17).

5. The horizontal installation auxiliary docking device for fan blades according to claim 4 is characterized in that: The fourth open end (8) of the movable arm (102) of the clamp is hinged to the second open end (6) of the fixed arm (101) of the clamp by using a common pin (18), and a telescopic cylinder assembly (19) is provided; The telescopic oil cylinder assembly (19) is used to realize the rotation of the clamp movable arm (102) on the clamp fixed arm (101).

6. The horizontal installation auxiliary docking device for fan blades according to claim 5, characterized in that: The telescopic oil cylinder assembly (19) comprises a hoop oil cylinder base (1901), a hoop oil cylinder (1902), a hoop hydraulic rod base (1904) and a hoop hydraulic rod (1903); The clamp oil cylinder base (1901) is fixedly arranged at the second open end (6) of the clamp fixing arm (101), and the clamp oil cylinder (1902) is arranged on the clamp oil cylinder base (1901); The clamp hydraulic rod base (1904) is fixedly arranged at the fourth open end (8) of the clamp movable arm (102); one end of the clamp hydraulic rod (1903) is arranged on the clamp cylinder (1902), and one end of the clamp hydraulic rod (1903) away from the clamp cylinder (1902) is arranged on the clamp hydraulic rod base (1904).

7. An operating method for the horizontal installation auxiliary docking device for fan blades according to claims 1 to 6, characterized in that: The steps include: Step 1: During the lifting stage, the lifting rope is fixed below the centering bearing base (301) and the device is lifted to the installation height by a crane; the clamp assembly (1) is adjusted so that the clamp movable arm (102) is opened outward to a certain angle; the crane is moved to translate the device closer to the tower (20), and the tower (20) can enter the clamp assembly (1) from the clamp opening until the anti-slip part (14) of the fixed arm tower (20) contacts the tower (20), and the clamp movable arm (102) is tightened to close the clamp assembly (1); Step 2: During the adjustment stage, the wheel hub (22) is rotated so that the normal direction of the hub (22) blade (23) interface is oriented horizontally; the nacelle (21) is rotated so that the center line of the blade (23) interface that has been oriented horizontally intersects with the center axis of the device within the adjustable range of the radial slide rail (11); the blade (23) centering mechanism is roughly adjusted, mainly including radial adjustment of the slide rail base (9), angle adjustment of the rotating base (10), lateral adjustment of the transverse base (12) and vertical adjustment of the blade (23) centering claw (302), so that the plane of the blade (23) centering claw (302) is parallel to the plane of the hub (22) interface, and the center of the blade (23) centering claw (302) is basically aligned with the center of the hub (22) interface; Step 3: During the docking stage, the blade (23) is clamped and lifted using a special hoist for horizontal lifting, the posture of the blade (23) is adjusted so that the blade root bolt plate is facing horizontally, and the blade (23) is lifted to the installation height; the crane is moved so that the root of the blade (23) is close to the blade (23) centering claw (302), the crane slowly lowers the height of the blade (23), and the cylindrical transition section at the root of the blade (23) is placed in the blade (23) centering claw (302); the operator aligns the bolt at the root of the blade (23) with the corresponding bolt hole through fine adjustment; The driving wheel (25) is started to push the blade (23) close to the hub (22), and the root bolts of the blade (23) are inserted into the corresponding bolt holes; Close the driving wheel (25) and tighten the bolts; after the tightening is completed, if the next blade (23) needs to be installed, start the fan hub (22) turning mechanism, rotate the hub (22), and move the installed blade (23) away from the blade (23) centering claw (302). The hub (22) rotates clockwise to move the blade (23). Similarly, if the blade (23) is installed in another direction, it rotates counterclockwise. At the same time, the next blade (23) docking port is also rotated to face the center axis of the device, that is, facing the blade (23) centering claw (302) that has been adjusted and aligned. Repeat the above blade (23) installation steps until all blades (23) are installed. Step 4: During the recovery phase, the wheel hub (22) is rotated to remove the blade (23) alignment claw (302) of the last installed blade (23); the crane is moved to drop the sling of the auxiliary docking device for horizontally installing the wind turbine blade (23) onto the device, and the sling is fixed by the worker on the device; the crane slowly recovers the rope until the rope is straightened and bears the full weight of the device; the movable arm (102) of the clamp is opened outward to a certain angle so that the tower (20) can be moved away from the clamp opening; the crane is moved to lift the device away from the tower (20) and recover it.

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