CN118705124A - A wind turbine blade installation auxiliary device - Google Patents

Abstract

The invention relates to the technical field of wind turbine blade installation, and discloses a wind turbine blade installation auxiliary device, comprising a hub hoisting structure, a suspension auxiliary structure, a blade installation auxiliary structure, an assembly center of gravity detection structure and a lifting rope group. The blade installation auxiliary structure adjusts the posture of the blade and then installs it on the hub. The hub hoisting structure is fixed to the outside of the hub and then cooperates with the suspension auxiliary structure and the lifting rope group for hoisting. The assembly center of gravity detection structure is used to detect the center of gravity position of the hub, blade and hub hoisting structure after assembly, and adjust the center of gravity position through the hub hoisting structure. The hub hoisting structure comprises a frame covering a fixed hub and a posture adjustment structure. The posture adjustment structure comprises a posture wheel. By changing the angle of the rotating posture wheel, the hub in hoisting is rotated. The device adopts a method of installing the blade first and then hoisting, which solves the problem that the hub posture is difficult to control in a suspended state during overall hoisting, and reduces the difficulty of hoisting.

Description

A wind turbine blade installation auxiliary device

Technical Field

The present invention relates to the technical field of wind turbine blade installation, and in particular to a wind turbine blade installation auxiliary device.

Background Art

Wind turbines are devices that convert wind energy into electrical energy, and consist of wind turbines, towers, and wind turbine blades. Wind turbine blades play a key role in wind turbines, and their design affects the overall power generation efficiency. They are usually made of composite materials to maximize the capture of wind energy and convert it into mechanical energy to drive the generator to generate electricity.

There are two ways to install wind turbine blades. One is to install the hub on the wind turbine and then hoist multiple blades onto the hub in sequence. The other is to install the blades on the hub on the ground first and then hoist them to the wind turbine for installation. The first way is the commonly used installation method. Although the hub installation is relatively simple, the subsequent installation of multiple blades is more difficult. First, it is necessary to control the blade posture during lifting on the ground. Secondly, it is difficult to control the rotation of the blades when the blades are hoisted in the air. Therefore, the lifting difficulty is high and the lifting efficiency is low. Although the second way reduces the difficulty of installing the blades on the hub, it increases the overall lifting difficulty. First, it avoids deformation of the blade ends touching the ground during lifting. Second, the hub adds blades, and the hub cannot control the posture of the hub suspended in the air, causing the hub axis and the generator axis to deviate in the longitudinal plane. This deviation is difficult to adjust in the air. Although the lifting efficiency is higher than the first way and reduces the difficulty of blade installation, it increases the hidden dangers and difficulty of lifting. An auxiliary device is needed to solve the shortcomings of overall lifting.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the above difficulties and provide a wind turbine blade installation auxiliary device.

In order to solve the above technical problems, the technical solution provided by the present invention is: a wind turbine blade installation auxiliary device, including a hub lifting structure, a suspension auxiliary structure, a blade installation auxiliary structure, an assembly center of gravity detection structure and a lifting rope group. The blade installation auxiliary structure adjusts the posture of the blade and installs it on the hub. The hub lifting structure is fixed to the outside of the hub and then cooperates with the suspension auxiliary structure and the lifting rope group for lifting. The assembly center of gravity detection structure is used to detect the center of gravity position of the hub, blades and hub lifting structure after assembly, and adjusts the center of gravity position through the hub lifting structure. The hub lifting structure includes a frame covering and fixing the hub and a posture adjustment structure. The posture adjustment structure includes a posture wheel. The hub in the lifting is rotated by changing the angle of the rotating posture wheel.

As an improvement: the wheel hub lifting structure includes an inner stretcher covering the wheel hub, a connecting frame, a retaining frame 1, two retaining frames 2, an adjustment frame and a lifting frame, the connecting frame is connected to the inner stretcher, one end of the retaining frame 1 is connected to the inner stretcher, and the other end is hinged to the adjusting frame, one end of the retaining frame 2 is connected to the connecting frame, and the other end is hinged to the adjusting frame, the lifting frame is connected to the connecting frame and the retaining frame 2, the inner sides of the inner stretcher, the connecting frame, the retaining frame 1 and the retaining frame 2 are all provided with support parts that fit the wheel hub, and the adjustment frame is provided with a posture adjustment structure, and the support of the wheel hub is realized through the various frames of the wheel hub lifting structure, so that the wheel hub lifting structure is fixed on the wheel hub, which is convenient for lifting.

As an improvement: the posture adjustment structure includes a motor 1, a turntable and a connecting plate, the front and rear ends of the two connecting plates are connected to the two turntables, a gear ring is provided on the outer side of one of the turntables, the output end of the motor 1 is provided with a gear 1 meshing with the gear ring, one side of one of the turntables is provided with a motor 2, a posture wheel is rotatably provided between the two connecting plates, the output end of the motor 2 and the rotating shaft of the posture wheel are both provided with belt-driven groove wheels, the adjustment frame includes a mold frame, an outer bracket is provided on the mold frame, and a fixed disk is symmetrically provided on the outer bracket, the turntable and the fixed disk rotate in coordination, the motor 1 is fixed on the outer bracket, and the posture adjustment structure enables the wheel hub to slowly rotate laterally to adjust the posture.

As an improvement: the auxiliary suspension structure includes a top plate and a bottom plate, the top of the bottom plate and the bottom of the top plate are rotatably matched, rotating wheels are rotatably provided on both sides of the bottom of the bottom plate, a winch is provided at the bottom of the bottom plate, a lifting ear 1 is provided on the top of the inner stretcher, guide wheels are rotatably provided on both sides, and a lifting ear 2 is provided at the corner of the lifting frame. The lifting rope group includes a hanging rope and an adjustment rope. The hanging rope passes around the two ends of the rotating wheel and is connected to the lifting ear 2 on the same side. One end of the adjustment rope is connected to the winch drum, and the other end is connected to the lifting ear 1. The wheel hub is changed from a horizontal posture to a vertical posture through the auxiliary suspension structure.

As an improvement: the assembly center of gravity detection structure includes a base, a load-bearing ring frame is provided on the top of the base, and multiple detection groups are provided on the base. The detection group includes hydraulic cylinder three, and the output end of hydraulic cylinder three is hingedly provided with a mounting platform. The mounting platform is arranged at the through hole at the top of the load-bearing ring frame, and a weight sensor is provided on the mounting platform. A load-bearing plate is provided on the weight sensor. By assembling the center of gravity detection structure, the approximate position of the center of gravity of the assembly can be located.

As an improvement: the blade installation auxiliary structure includes a walking seat, a lifting seat, an adjustment structure and an upper pressure plate. The walking seat is provided with multiple hydraulic cylinders 2, and the output end of the hydraulic cylinder 2 is connected to the bottom of the lifting seat. The adjustment structure includes an adjustment platform rotatably arranged on the top of the lifting seat, a lower clamping plate is provided on the adjustment platform, an adjustment column and a rotatable upper clamping plate are provided at the bottom of the upper pressure plate, a fixed groove platform matched with the adjustment column is provided on the lifting seat, and a fastening bolt matched with the adjustment column is provided at the threaded hole on the side of the fixed groove platform. The blade posture is adjusted through the blade installation auxiliary structure so that the blade can be smoothly installed on the wheel hub.

As an improvement: the adjustment structure also includes motor three and a synchronous shaft, on which gear three and gear four are provided, the output end of motor three is provided with gear two meshing with gear three, and the bottom of the adjustment platform is provided with a half gear ring meshing with gear four, so that the blades can rotate through the adjustment structure.

As an improvement: the blade installation auxiliary structure is provided with two, the synchronization shafts on the two blade installation auxiliary structures are connected with universal shafts, and the synchronization shafts are connected through the universal shafts to make the adjustment structures move synchronously.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present device adopts the method of installing the blades first and then hoisting them, and the blade installation efficiency is improved through the mutual cooperation of the hub hoisting structure, the suspension auxiliary structure, the blade installation auxiliary structure, and the assembly center of gravity detection structure, and the problem of the hub posture being difficult to control in the suspended state during the overall hoisting is solved, and the hoisting difficulty is reduced. Specifically:

1. The hub hoisting structure covers the fixed hub, which facilitates the coordination of the auxiliary suspension structure from the horizontal posture to the vertical posture, so that the hub can be hoisted horizontally in the initial stage of hoisting, avoiding the danger of the blade end hitting the ground;

2. The posture adjustment structure adopts the principle of conservation of angular momentum. By changing the angle of the posture wheel, the slow rotation of the wheel hub is achieved, which solves the difficulties and hidden dangers of manual adjustment of the wheel hub rotation;

3. The blade installation auxiliary structure realizes the rotation and height adjustment of the blade, and the blade is efficiently installed on the hub on the ground, solving the problem of difficult posture adjustment when the blade is installed by a crane;

4. By assembling the center of gravity detection structure, the approximate center of gravity of the blade, hub and hub lifting structure can be located during assembly, which is convenient for adjusting the lifting point position according to the center of gravity. The center of gravity position can be changed through the hub lifting structure, which is convenient for controlling the suspension posture adjustment and avoiding loss of control.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 2 is a second structural schematic diagram of a wind turbine blade installation auxiliary device according to the present invention.

FIG3 is a schematic structural diagram of a hub hoisting structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 4 is an exploded view of a hub hoisting structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 5 is a schematic structural diagram of a posture adjustment structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 6 is a schematic structural diagram of a suspension auxiliary structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 7 is a schematic structural diagram of a blade installation auxiliary structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG8 is an exploded view of a blade installation auxiliary structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 9 is a schematic structural diagram of an adjustment structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 10 is an exploded view of an assembly center of gravity detection structure of a wind turbine blade installation auxiliary device according to the present invention.

FIG. 11 is a cross-sectional view of an assembly center of gravity detection structure of a wind turbine blade installation auxiliary device according to the present invention.

As shown in the figure: 01, hub; 02, blade; 1, hub hoisting structure; 2, suspension auxiliary structure; 3, blade installation auxiliary structure; 4, assembly center of gravity detection structure; 5, lifting rope group; 11, inner stretcher; 111, guide wheel; 112, lifting ear 1; 12, connecting frame; 13, retaining frame 1; 131, counterweight; 14, retaining frame 2; 141, positioning hole 1; 15, adjustment frame; 151, frame; 152, external bracket; 153, fixed plate; 16, lifting frame; 161, positioning frame; 162, pin; 163, lifting ear 2; 164, positioning hole 2; 17, posture adjustment structure; 171, motor 1; 172, gear 1; 173, turntable; 174, gear ring; 175, connecting plate; 176, motor 2; 177, groove wheel; 178, posture wheel; 18, support member; 21, top plate; 211, lifting ear 3; 22, bottom plate; 221 , wheel; 222, winch; 31, travel seat; 311, seat body; 312, roller; 313, support platform; 314, hydraulic cylinder 1; 315, support plate; 316, hydraulic cylinder 2; 32, lifting seat; 321, fixed slot platform; 322, fastening bolt; 323, limit slot; 33, adjustment structure; 331, motor 3; 3311, gear 2; 332, synchronous shaft; 3321, gear 3; 3322, gear Wheel four; 333, adjustment table; 3331, half-toothed ring; 3332, lower clamping plate; 3333, limit strip; 334, support wheel; 34, upper pressure plate; 341, adjustment column; 342, upper clamping plate; 35, universal shaft; 41, base; 42, load-bearing ring frame; 43, hydraulic cylinder three; 44, mounting table; 45, weight sensor; 46, load-bearing plate; 51, main lifting rope; 52, auxiliary lifting rope; 53, hanging rope; 54, adjustment rope.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a wind turbine blade installation auxiliary device includes a hub hoisting structure 1, a suspension auxiliary structure 2, a blade installation auxiliary structure 3, an assembly center of gravity detection structure 4 and a lifting rope group 5. The blade installation auxiliary structure 3 adjusts the posture of the blade 02 and installs it on the hub 01. The hub hoisting structure 1 is fixed to the outside of the hub 01 and then cooperates with the suspension auxiliary structure 2 and the lifting rope group 5 for hoisting. The assembly center of gravity detection structure 4 is used to detect the center of gravity position of the hub 01, the blade 02 and the hub hoisting structure 1 after assembly, and adjust the center of gravity position through the hub hoisting structure 1.

As shown in Figures 2, 3 and 4, the wheel hub hoisting structure 1 includes an inner stretcher 11 covering the wheel hub 01, a connecting frame 12, a fixing frame 13, two fixing frames 14, an adjustment frame 15 and a lifting frame 16, the connecting frame 12 is bolted to the inner stretcher 11, one end of the fixing frame 13 is bolted to the inner stretcher 11, and the other end is hinged to the adjustment frame 15, and a counterweight 131 is provided on the top, one end of the fixing frame 14 is bolted to the connecting frame 12, and the other end is hinged to the adjustment frame 15, the inner stretcher 11, the connecting frame 12, the fixing frame 13 ... The inner sides of the connecting frame 12, the retaining frame 13 and the retaining frame 14 are all provided with support members 18 that fit with the wheel hub 01. The lifting frame 16 is connected to the connecting frame 12 and the retaining frame 14. A positioning frame 161 is provided on the lifting frame 16. A plurality of positioning holes 141 are provided on one side of the retaining frame 14. The through holes on the positioning frame 161 are plug-connected with the positioning holes 141 through pins 162. A plurality of positioning holes 164 are provided on the rear side of the lifting frame 16. The through holes at the bottom of the connecting frame 12 are connected with the positioning holes 164 through bolts.

Working principle of the wheel hub lifting structure 1: When installing the wheel hub lifting structure 1 to the wheel hub 01, first move the inner stretcher 11 and the connecting frame 12 to the appropriate positions and then bolt them together. Then move the adjustment frame 15 with the retaining frame 13 and the retaining frame 14 to the top of the wheel hub 01, then adjust the positions of the retaining frame 13 and the retaining frame 14, and bolt them to the inner stretcher 11 or the connecting frame 12. At this time, the support members 18 on each frame body are in contact with the wheel hub 01, and then connect the lifting frame 16 with the connecting frame 12 and the retaining frame 14. After the installation of the wheel hub 01 is completed, remove each frame body in turn, and adjust the center of gravity of the wheel hub lifting structure 1 by changing the connection position of the lifting frame 16 with the connecting frame 12 and the retaining frame 14, the weight of the counterweight 131 and the position installed on the retaining frame 13.

As shown in Figures 3, 4 and 5, the adjustment frame 15 is provided with a posture adjustment structure 17, which includes a motor 171, a turntable 173 and a connecting plate 175. The two connecting plates 175 are connected to the two turntables 173 at the front and rear ends. A gear ring 174 is provided on the outer side of one of the turntables 173. A gear 172 meshing with the gear ring 174 is provided at the output end of the motor 171. A motor 2 176 is provided on one side of one of the turntables 173. A posture wheel 178 is rotatably provided between the two connecting plates 175. A belt-driven groove wheel 177 is provided on the output end of the motor 2 176 and the rotating shaft of the posture wheel 178. The adjustment frame 15 includes a mold frame 151, an outer bracket 152 is provided on the mold frame 151, and a fixed disk 153 is symmetrically provided on the outer bracket 152. The turntable 173 rotates in cooperation with the fixed disk 153, and the motor 171 is fixed to the outer bracket 152.

Working principle of attitude adjustment structure 17: Motor 171 drives gear 172 to rotate, and through the meshing transmission of gear 172 and gear ring 174, drives turntable 173 to rotate in fixed disk 153, and motor 2 176 drives groove wheel 177 to rotate, and drives attitude wheel 178 to rotate through belt transmission. When adjusting the attitude, first rotate the turntable 173 to make the attitude wheel 178 rotate to a horizontal state, and then make the attitude wheel 178 rotate at a high speed. At this time, rotating the turntable 173 will change the angle of the attitude wheel 178. According to the principle of conservation of angular momentum, the hub hoisting structure 1 in the suspended state will drive the hub 01 and the blade 02 to perform a slow angular deflection, thereby realizing the angle adjustment of the hub 01. The hub 01 can be stopped by resetting by rotating the turntable 173, and the hub 01 can be rotated in the opposite direction by rotating the turntable 173 in the opposite direction.

As shown in Figures 2, 4 and 6, the suspension auxiliary structure 2 includes a top plate 21 and a bottom plate 22. The top of the bottom plate 22 is rotatably matched with the bottom of the top plate 21. A lifting ear 3 211 is provided on the top of the top plate 21. Rotating wheels 221 are rotatably provided on both sides of the bottom of the bottom plate 22. A winch 222 is provided at the bottom of the bottom plate 22. A lifting ear 112 is provided on the top of the inner stretcher 11, and guide wheels 111 are rotatably provided on both sides. A lifting ear 2 163 is provided at the corner of the lifting frame 16. The lifting rope group 5 includes a main lifting rope 51, an auxiliary lifting rope 52, a hanging rope 53 and an adjusting rope 54. One end of the multiple auxiliary lifting ropes 52 is connected to the hook on the main lifting rope 51, and the other end is connected to the lifting ear 3 211. The hanging rope 53 passes around the rotating wheel 221 and is connected to the same side lifting ear 2 163 at both ends. One end of the adjusting rope 54 is connected to the drum of the winch 222, and the other end is connected to the lifting ear 112.

Working principle of the suspension auxiliary structure 2: the main lifting rope 51 of the crane hangs the top plate 21 connected to the auxiliary lifting rope 52 through a hook, and pulls the lifting rope 53 through the rotating wheel 221 to lift the lifting frame 16. The lifting frame 16 bears the weight of the hub lifting structure 1, the hub 01 and the blade 02. During the initial lifting, as shown in Figure 1, the hub 01 and the blade 02 are in a horizontal state. At this time, the two bearing points of the hanging rope 53 are the second lifting ear 163 and the guide wheel 111 on the same side. After the hub 01 is lifted to a certain height, the adjustment rope 54 is slowly pulled by the winch 222 to rotate the hub 01 to a vertical state. During this process, the hanging rope 53 automatically adjusts to disengage from the guide wheel 111. In order to facilitate the adjustment of the hanging point position of the hanging rope 53 according to the center of gravity, the hanging rope 53 can be tied to the outer frame of the lifting frame 16 instead of the second lifting ear 163. A baffle can be welded on the outer frame to prevent the binding point of the hanging rope 53 from sliding.

As shown in Figures 1, 10 and 11, the assembled center of gravity detection structure 4 includes a base 41, a load-bearing ring frame 42 is provided on the top of the base 41, a plurality of detection groups are provided on the base 41, the detection group includes a hydraulic cylinder three 43, a mounting platform 44 is hingedly provided at the output end of the hydraulic cylinder three 43, the mounting platform 44 is arranged at the through hole at the top of the load-bearing ring frame 42, a weight sensor 45 is provided on the mounting platform, and a load-bearing plate 46 is provided on the weight sensor 45.

Working principle of the assembled gravity center detection structure 4: The hub 01 is transferred to the load-bearing plate 46 above the load-bearing ring frame 42 by a crane. At this time, the weight on the load-bearing plate 46 is supported by the load-bearing ring frame 42. After the blade 02 and the hub lifting structure 1 are installed on the hub 01, the hydraulic cylinders 43 of multiple detection groups are synchronously operated to raise the load-bearing plate 46 to a certain height, so that the mounting platform 44 is separated from the top through hole of the load-bearing ring frame 42. Multiple weight sensors 45 obtain gravity values at different positions. If the gravity values are evenly distributed or symmetrically distributed, The center of gravity is at the axis of the wheel hub 01, and the center of gravity can be placed at the axis of the wheel hub 01 by adjusting the lifting frame 16 or the counterweight 131. Then, the load-bearing plate 46 on one side pushes the wheel hub 01 to deflect. Multiple weight sensors 45 obtain gravity values at different positions, and the approximate position of the center of gravity at the axis of the wheel hub 01 is obtained, so that the lifting point can be adjusted according to the position of the center of gravity to make the lifting stable. The implementation of the above-mentioned device requires the cooperation of a matching weight distribution analysis program. The weight distribution analysis program is a prior art and will not be described in detail.

As shown in Figures 1, 7 and 8, the blade installation auxiliary structure 3 includes a walking seat 31, a lifting seat 32, an adjustment structure 33 and an upper pressure plate 34. The walking seat 31 includes a seat body 311, rollers 312 are arranged on both sides of the seat body 311, and a support platform 313 is arranged at the front and rear ends of the seat body 311. A hydraulic cylinder 314 is arranged in the groove of the support platform 313, and a support plate 315 is arranged at the output end of the hydraulic cylinder 314. A plurality of hydraulic cylinders 316 are arranged on the seat body 311, and a hydraulic cylinder 314 is arranged at the output end of the hydraulic cylinder 314. The output end of cylinder 2 316 is connected to the bottom of the lifting seat 32. The adjustment structure 33 includes an adjustment platform 333 rotatably set on the top of the lifting seat 32. A lower clamping plate 3332 is provided on the adjustment platform 333. An adjustment column 341 is provided at the bottom of the upper pressure plate 34. An upper clamping plate 342 is rotatably provided at the bottom of the upper pressure plate 34. A fixed groove platform 321 cooperating with the adjustment column 341 is provided on the lifting seat 32. A fastening bolt 322 cooperating with the adjustment column 341 is provided at the side threaded hole of the fixed groove platform 321.

Working principle of blade installation auxiliary structure 3: transfer blade 02 on the operating vehicle to lower clamping plate 3332 on two or more assembly center of gravity detection structures 4 through crane, then press upper clamping plate 342 onto blade 02, fix the position of adjustment column 341 by tightening bolt 322, then move blade 02 to the position of hub 01 through blade installation auxiliary structure 3, push lifting seat 32 through hydraulic cylinder 2 316 to adjust the height of blade 02, rotate adjustment platform 333 through adjustment structure 33 to rotate angle of blade 02 so that blade 02 can be installed on hub 01.

As shown in Figures 8 and 9, the adjustment structure 33 also includes a motor three 331 and a synchronization shaft 332. The synchronization shaft 332 is provided with a gear three 3321 and a gear four 3322. The output end of the motor three 331 is provided with a gear two 3311 meshing with the gear three 3321. The bottom of the adjustment platform 333 is provided with a semi-toothed ring 3331 meshing with the gear four 3322. Limiting bars 3333 are provided on both sides of the adjustment platform 333. A limiting groove 323 slidingly matched with the limiting bar 3333 is provided in the groove at the top of the lifting seat 32. A supporting wheel 334 is rotatably provided inside the lifting seat 32, and the supporting wheel 334 cooperates with the adjustment platform 333. Two blade installation auxiliary structures 3 are provided, and the synchronization shafts 332 on the two blade installation auxiliary structures 3 are connected with a universal shaft 35.

Working principle of adjustment structure 33: Motor three 331 drives gear two 3311 to rotate, and gear two 3311 is meshed with gear three 3321 to rotate the synchronization shaft 332, and gear four 3322 is meshed with half gear ring 3331 to rotate the adjustment platform 333, and the synchronization shaft 332 connected by the universal shaft 35 makes the two synchronization shafts 332 rotate synchronously and at the same speed.

In the specific implementation of the present invention, the hub 01 is suspended on the assembly center of gravity detection structure 4, and then the blade 02 is suspended on the blade installation auxiliary structure 3. The posture of the blade 02 is adjusted by the blade installation auxiliary structure 3 to facilitate the installation of the blade 02 on the hub 01. After the installation of the blade 02 is completed, the various frames of the hub hoisting structure 1 are assembled on the hub 01, and then the center of gravity of the assembly is roughly located by assembling the center of gravity detection structure 4, and then the lifting rope group 5 is connected to the hub hoisting structure 1 and the auxiliary suspension structure 2, and then the lifting is completed. The machine horizontally lifts the wheel hub 01 fixed by the wheel hub lifting structure 1 through the suspension auxiliary structure 2, as shown in the state of Figure 1. After lifting to a certain height, the wheel hub lifting structure 1 is pulled by the winch 222 to slowly change the wheel hub 01 from a horizontal state to a vertical state, as shown in the state of Figure 2. Then the lifting is continued to raise the wheel hub 01 to the installation height, and then the posture adjustment structure 17 is used to slowly rotate the wheel hub 01 to adjust the posture, so as to facilitate the installation of the wheel hub 01. After the installation of the wheel hub 01 is completed, the various frames of the wheel hub lifting structure 1 are disassembled and lifted down.

The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims (8)

1. A wind turbine blade installation auxiliary device, characterized in that it comprises a hub hoisting structure (1), a suspension auxiliary structure (2), a blade installation auxiliary structure (3), an assembly center of gravity detection structure (4) and a suspension rope group (5), wherein the blade installation auxiliary structure (3) adjusts the posture of the blade (02) and then installs it on the hub (01), the hub hoisting structure (1) is fixed to the outside of the hub (01) and then cooperates with the suspension auxiliary structure (2) and the suspension rope group (5) for hoisting, the assembly center of gravity detection structure (4) is used to detect the center of gravity position of the hub (01), the blade (02) and the hub hoisting structure (1) after assembly, and adjusts the center of gravity position through the hub hoisting structure (1), the hub hoisting structure (1) comprises a frame covering and fixing the hub (01) and a posture adjustment structure (17), the posture adjustment structure (17) comprises a posture wheel (178), and the hub (01) in hoisting is rotated by changing the angle of the rotating posture wheel (178). 2. A wind turbine blade installation auxiliary device according to claim 1, characterized in that: the hub hoisting structure (1) comprises an inner stretcher (11) covering the hub (01), a connecting frame (12), a retaining frame 1 (13), two retaining frames 2 (14), an adjusting frame (15) and a lifting frame (16), the connecting frame (12) is connected to the inner stretcher (11), one end of the retaining frame 1 (13) is connected to the inner stretcher (11), and the other end is connected to the adjusting frame (15). The inner stretcher (11), the connecting frame (12), the retaining frame (13) and the retaining frame (14) are hingedly connected, one end of the retaining frame (14) is connected to the connecting frame (12), and the other end is hingedly connected to the adjusting frame (15), the lifting frame (16) is connected to the connecting frame (12) and the retaining frame (14), the inner sides of the inner stretcher (11), the connecting frame (12), the retaining frame (13) and the retaining frame (14) are all provided with a support member (18) that fits the wheel hub (01), and the adjusting frame (15) is provided with a posture adjustment structure (17). 3. A wind turbine blade installation auxiliary device according to claim 2, characterized in that: the posture adjustment structure (17) comprises a motor 1 (171), a rotating disk (173) and a connecting plate (175), the front and rear ends of the two connecting plates (175) are connected to the two rotating disks (173), a gear ring (174) is provided on the outer side of one of the rotating disks (173), the output end of the motor 1 (171) is provided with a gear 1 (172) meshing with the gear ring (174), and one side of the rotating disk (173) is provided with a motor 2 (176), a posture wheel (178) is rotatably provided between the two connecting plates (175), a belt-driven groove wheel (177) is provided on the output end of the motor 2 (176) and the rotation shaft of the posture wheel (178), the adjustment frame (15) comprises a mold frame (151), an outer bracket (152) is provided on the mold frame (151), a fixed disk (153) is symmetrically provided on the outer bracket (152), the rotating disk (173) and the fixed disk (153) are rotatably matched, and the motor 1 (171) is fixed on the outer bracket (152). 4. A wind turbine blade installation auxiliary device according to claim 2, characterized in that: the suspension auxiliary structure (2) comprises a top plate (21) and a bottom plate (22), the top of the bottom plate (22) is rotatably matched with the bottom of the top plate (21), rotating wheels (221) are rotatably provided on both sides of the bottom of the bottom plate (22), a winch (222) is provided at the bottom of the bottom plate (22), a lifting ear (112) is provided at the top of the inner stretcher (11), and guide wheels (111) are rotatably provided on both sides, a lifting ear (163) is provided at the corner of the lifting frame (16), a lifting rope group (5) comprises a hanging rope (53) and an adjusting rope (54), the hanging rope (53) passes around the rotating wheel (221) and the two ends are connected to the same side lifting ear (163), one end of the adjusting rope (54) is connected to the winch (222) drum, and the other end is connected to the lifting ear (112). 5. A wind turbine blade installation auxiliary device according to claim 1, characterized in that: the assembly center of gravity detection structure (4) includes a base (41), a load-bearing ring frame (42) is provided on the top of the base (41), and a plurality of detection groups are provided on the base (41), the detection group includes a hydraulic cylinder three (43), and a mounting platform (44) is hingedly provided at the output end of the hydraulic cylinder three (43), and the mounting platform (44) is arranged at the top through hole of the load-bearing ring frame (42), and a weight sensor (45) is provided on the mounting platform, and a load-bearing plate (46) is provided on the weight sensor (45). 6. A wind turbine blade installation auxiliary device according to claim 1, characterized in that: the blade installation auxiliary structure (3) includes a walking seat (31), a lifting seat (32), an adjustment structure (33) and an upper pressure plate (34), the walking seat (31) is provided with a plurality of hydraulic cylinders (316), the output end of the hydraulic cylinder (316) is connected to the bottom of the lifting seat (32), the adjustment structure (33) includes an adjustment platform (333) rotatably arranged on the top of the lifting seat (32), a lower clamping plate (3332) is provided on the adjustment platform (333), an adjustment column (341) and a rotatable upper clamping plate (342) are provided at the bottom of the upper pressure plate (34), the lifting seat (32) is provided with a fixed groove platform (321) matched with the adjustment column (341), and a fastening bolt (322) matched with the adjustment column (341) is provided at the side threaded hole of the fixed groove platform (321). 7. A wind turbine blade installation auxiliary device according to claim 6, characterized in that: the adjustment structure (33) also includes a motor three (331) and a synchronous shaft (332), the synchronous shaft (332) is provided with a gear three (3321) and a gear four (3322), the output end of the motor three (331) is provided with a gear two (3311) meshing with the gear three (3321), and the bottom of the adjustment platform (333) is provided with a half gear ring (3331) meshing with the gear four (3322). 8. A wind turbine blade installation auxiliary device according to claim 7, characterized in that: the blade installation auxiliary structure (3) is provided with two, and the synchronization shafts (332) on the two blade installation auxiliary structures (3) are connected to a universal shaft (35).