Single-blade equipment of wind generating set and hoisting method

Abstract

The invention relates to the technical field of wind power generation, in particular to single-blade equipment of a wind generating set and a hoisting method.The single-blade equipment of the wind generating set comprises a plurality of single pieces arranged linearly, and every two adjacent single pieces are connected through an insertion structure; the plug-in structure comprises a plug-in body installed on one single piece and a plug hole formed in the adjacent single piece, and the plug-in body and the plug hole are used in cooperation. The blade is designed to be a plurality of single pieces which can be spliced, the blade can be transported in a single or stacked mode, the overall length during transportation is greatly reduced, transportation is more flexible, particularly, the blade is more convenient to process turning roads, the transportation efficiency is improved, and the transportation cost is reduced; and the hoisting process is simplified: each single blade is lighter in weight and smaller in windward area relative to the whole blade, so that the hoisting process becomes easier and faster.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a single-blade device of a wind power generator set and a hoisting method thereof. Background Art

[0002] As the global energy structure transforms to clean energy, wind energy, as a renewable and pollution-free energy form, has been widely used and rapidly developed. As the core equipment for wind energy utilization, the technical level and performance of wind turbines directly affect the efficiency and economy of wind energy utilization. In recent years, with the continuous advancement of wind power technology, the single-unit capacity of wind turbines has continued to increase, and the blade length has also increased accordingly, which has put higher requirements on the material, structure and manufacturing process of the blades.

[0003] Traditional wind turbine blades are integrated vacuum infusion molded and are relatively long. The cost of transportation and hoisting is often greater than the cost of the blades themselves, especially during the hoisting process. Since the traditional hoisting method is to assemble three blades on the ground for overall hoisting, a large and highly flat site is required to meet the operational requirements of blade assembly and large hoisting equipment. This not only increases the site construction and processing costs, but is even difficult to achieve in some areas with complex terrain or limited space. During hoisting, the three blades need to be lifted horizontally to a certain height and then adjusted to make them vertical. This makes it difficult to adjust the direction at high altitudes and is not easy to control. In terms of safety, the windward area of ​​the three blades is huge when they are hoisted as a whole. Under the action of wind, the amplitude of shaking during hoisting increases significantly, which can easily lead to safety accidents. Summary of the invention

[0004] The present invention provides a single-blade device for a wind turbine generator set and a hoisting method, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A single-blade device for a wind turbine generator set comprises a plurality of single blades arranged in a straight line, and two adjacent single blades are connected by a plug-in structure; The plug-in structure comprises an insert body installed on one of the single sheets and an insert hole opened on the adjacent single sheet, and the insert body and the insert hole are used in coordination.

[0006] In some embodiments of the present invention, the interior of the single sheet may be filled, and the filling material is at least one of a lightweight foam material, a honeycomb material, a lightweight wood, or a wood composite material.

[0007] In some embodiments of the present invention, the opening position of the jack is set as a guide surface, and the connection position between the plug body and the single piece is set as a transition surface used in conjunction with the guide surface.

[0008] In some embodiments of the present invention, the plug-in structure further includes a clamping unit for locking the plug-in body and the inner wall of the plug-in hole.

[0009] In some embodiments of the present invention, the clamping unit includes a plurality of protrusions, each of which includes at least two chambers relatively opened inside the inserting body, a sliding body is slidably arranged in each of the chambers, and one side of the sliding body is connected to the inner wall of the chamber by an elastic body, and the other side of the sliding body is provided with a wedge block slidably extending to the outside of the inserting body; The inner side wall of the insertion hole is provided with a side hole used in conjunction with each wedge block.

[0010] In some embodiments of the present invention, each of the wedges in the protrusion is retracted into the chamber by magnetic control.

[0011] In some embodiments of the present invention, at least three lifting positions are arranged on the front and back sides of the insert.

[0012] In some embodiments of the present invention, the horizontal plane projection and the vertical plane projection of each of the hoisting positions are distributed in a polygonal manner.

[0013] In some embodiments of the present invention, the hoisting position is a hoisting hole and a lifting portion detachably disposed with respect to the hoisting hole.

[0014] A method for hoisting a single-blade device of a wind turbine generator set in the present invention comprises the following steps: Move the tractor to the work area and pass several lifting ropes on the tractor through the pulley block structure; Hang the pulley block structure on the top of the tower, and let several suspension ropes hang down to the ground; Connect each end of the lifting rope to the lifting position on the single piece; The tractor pulls several lifting ropes simultaneously to transport and lift the single piece; During the lifting process of the single piece, a plurality of lifting ropes surround the single piece and block it, and the direction of the single piece is defined by the plurality of lifting ropes; When the single piece is hoisted to the specified position, the two single pieces are connected through the plug-in structure.

[0015] The technical solution of the present invention can achieve the following technical effects: Reduce transportation costs: By designing the blades into multiple single pieces that can be spliced, they can be transported individually or in stacks, which greatly reduces the overall length during transportation and makes transportation more flexible, especially when dealing with curved roads, thus improving transportation efficiency and reducing transportation costs; Simplify the hoisting process: Since each single blade is lighter and has a smaller windward area than the entire blade, the hoisting process becomes easier and faster. At the same time, it reduces the need for a large area of ​​flat ground, is suitable for areas with complex terrain or limited space, and reduces the cost of site construction and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic structural diagram of an insert body in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of a jack in an embodiment of the present invention; Figure 4 is a schematic cross-sectional structural diagram of an insert body in an embodiment of the present invention; Figure 5 This is a schematic diagram of a single piece of lifting; Figure 6 It is a schematic diagram of the structure of a wind turbine generator set with completed blade assembly.

[0018] Reference numerals: 100, single piece; 101, insert; 102, insert hole; 103, guide surface; 104, transition surface; 105, chamber; 106, elastic body; 107, sliding body; 108, wedge; 109, lifting hole; 200. Lifting part; 201. Lifting rope; 202. Encircling rope. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] like Figures 1 to 6As shown, a single-blade device of a wind turbine generator set of the present invention comprises a plurality of single pieces 100 arranged in a straight line, and two adjacent single pieces 100 are connected by a plug-in structure; since the blade is spliced ​​by a plurality of single pieces 100, a single single piece 100 or a plurality of single pieces 100 can be transported in a stacked manner during transportation, which can greatly reduce the transportation length of the blade and reduce the transportation cost, especially on some curved roads, it can make it more convenient for the transport vehicle to complete the turn, thereby improving the transportation speed and efficiency. In the process of wind turbine assembly and blade hoisting, since the weight of a single single piece 100 is relatively small and its windward area is small, the hoisting work can be realized more easily, conveniently and quickly, and a large work site will not be occupied. In the present invention, a plug-in structure is used to realize the connection of two adjacent single pieces 100. Compared with the connection method such as traditional bolts, the connection strength and tightness are higher and the integrity is stronger. Of course, the plug-in structure used here can be any plug-in method such as cross plug-in, staggered plug-in, multi-point plug-in, etc., which are all within the protection scope of the present invention. The plug-in structure includes an insert 101 installed on one single chip 100 and a socket 102 opened on an adjacent single chip 100, and the insert 101 and the socket 102 are used in conjunction with each other; in the present invention, the insert 101 is installed on one end face of the single chip 100, and its specific installation method can be welding, bolt connection, etc., of course, it can also be an integrated molding processing method, which will not be repeated here; when two adjacent single chips 100 are connected, the socket 102 on one single chip 100 can be directly covered on the insert 101 on the other single chip 100, or the insert 101 on one single chip 100 can be directly covered on the insert 101 on the other single chip 100. Directly inserting into the socket 102 on another single chip 100 to achieve connection, this plug-in method is more convenient and quick; it should be pointed out that the shapes of the above-mentioned plug body 101 and the socket 102 can be any shape such as a cross shape, a flat plate shape, etc., and their number can be determined according to the actual assembly strength, weight and other requirements, and in order to increase the contact area and improve the connection strength, the socket 102 can also be notched or irregularly notched in the direction perpendicular to the length of the blade, so that the connection position of the two adjacent single chips 100 extends to the outer wall of the single chip 100, rather than just within the coverage range of the end face of the single chip 100.

[0022] In the above embodiment, the single piece 100 is made of glass fiber reinforced composite material, carbon fiber reinforced composite material or nano composite material; these materials have the following advantages: Glass fiber reinforced composite materials, also known as GFRP, are low-cost, have high strength and stiffness, can meet the needs of most wind turbine blades, are corrosion-resistant, suitable for various climatic conditions, especially in humid or salt spray environments, and have mature processes and are easy to mass-produce; Carbon fiber reinforced composite materials, also known as CFRP, have high strength and stiffness, and are suitable for manufacturing large blades. They are lightweight, significantly reducing the weight of blades and the load on towers and foundations. They have high fatigue resistance and perform better in long-term high-stress environments, extending blade life. The fiber direction can be adjusted as needed to optimize blade performance. Nanocomposites have good mechanical properties. By adding nanoparticles, such as carbon nanotubes and graphene, the strength, stiffness and toughness of the material can be significantly improved. They have good fatigue resistance. Nanoparticles can inhibit crack propagation and extend the life of the blade. Nanocomposites can also have additional functions such as electrical conductivity, thermal conductivity or self-repair. Of course, in addition to the above-mentioned materials, thermoplastic composites, natural fiber composites, hybrid composites, metal-based composites, bio-based composites, etc. can also be used. The selection of specific materials can be comprehensively considered based on the actual installation environment, power generation, average wind speed, weight and other factors.

[0023] Furthermore, the interior of the single piece 100 may be filled, and the filling material is at least one of a lightweight foam material, a honeycomb material, a lightweight wood, or a wood composite material; Here, the interior of the single piece 100 is set to be fillable, which can effectively reduce the weight of the single piece 100, thereby reducing the load on the tower and the foundation, and the use of filling materials can effectively enhance the structural strength, rigidity and bending resistance of the single piece 100, improve the overall structural strength, and reduce deformation and vibration under high wind speeds. The use of filling materials can reduce the amount of high-performance materials, such as carbon fiber, thereby reducing manufacturing costs. At the same time, the filling material can be used as the core material of the sandwich structure, simplifying the layered manufacturing process of the blade and improving production efficiency. In this case, the advantages of the filling material are as follows: Lightweight foam material, light weight, low density, provides good compression resistance and energy absorption characteristics, easy to process and shape, corrosion-resistant, suitable for various environmental conditions; Honeycomb material, extremely high strength-to-weight ratio, excellent compression and shear resistance, good energy absorption characteristics, suitable for high stress areas, strong designability, suitable for complex structures; Lightweight wood or wood composite materials are natural renewable materials, environmentally sustainable, light in weight, moderate in strength, easy to process and bond, low in cost, and suitable for small and medium-sized blades.

[0024] Of course, in addition to the materials listed above, 3D printing lightweight structures, hollow structures, composite filling materials, air or inert gas filling, metal foams, bio-based foam materials, ceramic foams, etc. can also be used. Each material has its own unique advantages and disadvantages and scope of application. You can choose to use or use in combination according to the actual situation. I will not go into details here. It should be pointed out that the fillable arrangement inside the single chip 100 can also be equipped with other structures, such as an oscillator for detecting the vibration amplitude of the blades, a conductor for achieving a lightning protection effect, a detector for detecting the rotation speed of the blades, and other structures.

[0025] Optimized to the above implementation, such as Figures 2 to 4 As shown, the opening position of the jack 102 is set as a guide surface 103, and the connection position between the plug body 101 and the single chip 100 is set as a transition surface 104 used in conjunction with the guide surface 103; the setting of the guide surface 103 and the transition surface 104 can facilitate the guidance of the plug body 101, so that the plug body 101 can be inserted into the jack 102 more easily and accurately, reducing the difficulty requirements during assembly, achieving a quick assembly effect, and improving assembly accuracy, which is particularly suitable for high-altitude assembly work; in this case, the specific shapes of the guide surface 103 and the transition surface 104 can be any shape such as an arc surface, an inclined surface, a slope surface, etc., as long as they can play a guiding role, they are within the protection scope of this case; of course, the use of this shape setting of the guide surface 103 and the transition surface 104 can also play the effect of strengthening the strength of the single chip 100 and improving the integrity of the single chip 100, especially at the connection position of the single chip 100 and the plug body 101, to avoid cracks, damage, etc. at the connection position due to the gravity or wind force of the adjacent single chip 100.

[0026] Optimized to the above implementation, the plug-in structure also includes a clamping unit for locking the inner wall of the plug body 101 and the plug hole 102; the clamping unit can be used to fasten the plug body 101 and the plug hole 102, that is, the two single pieces 100 are connected together, and the plug-in positioning effect of the plug body 101 and the plug hole 102 is matched, so as to realize the overall assembly of the blade; in the present invention, this structural method can avoid the manual assembly connection of the two single pieces 100 by the construction personnel, that is, the bolt connection or other connection methods that require manual tightening by workers in the traditional method are eliminated, thereby reducing the construction difficulty, facilitating the improvement of the safety of the blade hoisting and assembly, and at the same time improving the construction speed; Based on the above implementation, the snap-in unit can adopt any snap-in method such as spring snap, magnetic snap, etc. As long as the technical effect of this case can be achieved, it is within the protection scope of this case.

[0027] Optimized in the above implementation, the clamping unit includes a plurality of protrusions, each of which includes at least two chambers 105 relatively opened inside the insert 101, a sliding body 107 is slidably arranged in each chamber 105, and one side of the sliding body 107 is connected to the inner wall of the chamber 105 through an elastic body 106, and the other side of the sliding body 107 is provided with a wedge block 108 that slides out to the outside of the insert 101; The inner wall of the insertion hole 102 is provided with a side hole for use with each wedge 108; In the present invention, the arrangement of several protrusions is to achieve a multi-point connection between adjacent plug bodies 101 and sockets 102, which can improve the connection strength and stability and achieve force dispersion. The number and arrangement of the protrusions are not limited here, as long as they can achieve the purpose of this case; of course, for some protrusions with special arrangements or specific numbers, or other forms of protrusions, even if they have advantages such as better connection effect and convenient processing, they are still within the protection scope of this case; In the above embodiment, the relative arrangement of the multiple chambers 105 in the protruding portion can make the multiple wedge blocks 108 evenly stressed when they are used in conjunction with the inner holes of the insertion hole 102. One end of the wedge block 108 is located in the chamber 105 and connected to the sliding body 107, and the other end of the wedge block 108 is located outside the insertion hole 102, and the end of the wedge block 108 is set in a wedge shape, so that when two adjacent single pieces 100 are docked, the wedge block 108 can be smoothly squeezed into the insertion hole 102. When the wedge block 108 reaches the side hole position, the elastic body 106 will push the wedge block 108 to be inserted into the side hole through the sliding body 107, so that it can achieve an assembly effect; It can be seen that the moving direction of the sliding body 107 and the wedge block 108 is perpendicular to the working direction of the plug 101. Due to the limitation of the shape of the wedge block 108, the sliding body 107 is needed to achieve a guiding effect. If the elastomer 106 is directly connected to the wedge block 108, since the shape of the outer end of the wedge block 108 is wedge-shaped, when it enters the chamber 105, the wedge block 108 may move, and its position and connection strength will be unstable. In the present invention, since the sliding body 107 needs to move in the chamber 105, the space on both sides of the sliding body 107 needs to be the same to avoid other changes from interfering with the movement of the sliding body 107. Therefore, air holes need to be opened on the sliding body 107.

[0028] Optimized in the above implementation, each wedge 108 in the protrusion is retracted into the chamber 105 through magnetic control; the wedge 108 referred to in the above content is retracted into the chamber 105, which can be in the process of blade disassembly and replacement, or in the process of assembly, as long as the movement of the wedge 108 can be actively controlled. Of course, other methods can also be used to achieve this purpose, such as using motors, cylinders and other structures, but this conventional method is not suitable for the field of outdoor wind turbines, and it will increase the weight of the blades. Therefore, choosing magnetic control is undoubtedly a simpler and low-cost method; In the present invention, magnetic control can be electromagnet control, magnet control or other magnetic force control methods. For example, when electromagnet control is used, an electromagnetic coil can be installed in the sliding body 107 or the wedge block 108. When power is turned on, the multiple relatively distributed sliding bodies 107 or wedge blocks 108 in the protrusion will generate magnetic force with each other and approach each other. At this time, the wedge block 108 will retract into the chamber 105, and the elastomer 106 will undergo elastic deformation; of course, when the single piece 100 is disassembled, the blade is generally rotated to the lower side of the wind turbine and made vertical. During the retraction of the wedge block 108, due to the friction between the wedge block 108 and the inner wall of the side hole and the gravity of the single piece 100, the friction will hinder the retraction movement of the wedge block 108. Therefore, when performing this operation, the single piece 100 to be disassembled needs to be lifted upward to reduce the friction.

[0029] Optimized in the above implementation, at least three lifting positions are provided on the front and back sides of the insert 101; the setting of the lifting positions is mainly for the convenience of lifting the single piece 100, and the specific lifting method can be a crane, a cable on the top of the tower, etc., and the setting of at least three lifting positions can make the lifting work more stable, even if one lifting position is separated, the other lifting positions can continue to work; Based on the above implementation, the lifting position can be realized by means of cable winding, hooks, and lifting rod insertion, which are all within the protection scope of this case.

[0030] Optimized in the above implementation, the horizontal plane projection and the vertical plane projection of each lifting position are polygonal distribution, and each lifting position is relatively distributed on the insert 101; in the present invention, the polygonal distribution of the lifting position refers to triangular distribution, quadrilateral distribution or other geometric distribution forms, this distribution form can disperse the force points, so that the lifting work of the single chip 100 is more stable; specifically, each lifting position can be polygonal distribution on the horizontal plane, polygonal distribution on the vertical plane, and polygonal distribution on the inclined plane. This distribution position and distribution form can make full use of the space and the lifting rope 201, so that the multiple lifting ropes 201 form a distribution mode with a retaining wall effect to surround and block the single chip 100 on all sides, avoid the single chip 100 from shaking, tipping, rotating and other movements during lifting, and realize stable lifting of the single chip 100.

[0031] Optimized to the above implementation, such as Figure 5As shown, the lifting position is a lifting hole 109 and a lifting part 200 detachably arranged with the lifting hole 109; in the present invention, the lifting part 200 can be inserted or stuck into the lifting hole 109, and the lifting rope 201 is connected to the lifting part 200, thereby realizing the lifting work of the single piece 100 by multiple lifting ropes 201; the lifting part 200 can be an ordinary plug rod, a mechanical card lock or a remote control telescopic structure, etc., which correspond to different operation modes respectively. For example, when disassembling the ordinary plug rod, the worker needs to be lifted to a high place and pulled out of the lifting hole 109. The mechanical card lock can be lowered after the assembly of the single piece 100 is completed, so that the mechanical card lock is loosened and unlocked, and the remote control telescopic structure can be separated by automatic control of ground personnel; of course, drone operation can also be used to improve convenience, which will not be repeated here; In the present case, when multiple lifting ropes 201 are lifting a single piece 100, in order to improve safety and prevent the single piece 100 from tipping over between two adjacent lifting ropes 201, one or more enclosure ropes 202 may be sleeved on the outside of the single piece 100, and the enclosure ropes 202 may be connected to the multiple lifting ropes 201 to achieve a containment effect on the single piece 100 through the enclosure ropes 202.

[0032] A method for hoisting a single-blade device of a wind turbine generator set in the present invention comprises the following steps: Move the tractor to the work area, and pass the several lifting ropes 201 on the tractor through the pulley block structure; The pulley block structure is hung on the top of the tower, and a plurality of suspension ropes 201 are hung down to the ground; Connect each end of the lifting rope 201 to the lifting position on the single piece 100; The tractor pulls several lifting ropes 201 simultaneously to transport and lift the single piece 100; During the lifting process of the single piece 100, a plurality of lifting ropes 201 surround the single piece 100 and block it, and the direction of the single piece 100 is defined by the plurality of lifting ropes 201; When the single piece 100 is hoisted to a designated position, two single pieces 100 are connected via a plug-in structure.

[0033] In the present invention, the above-mentioned lifting process can avoid the high-altitude operation of the crane, thereby avoiding the bending and damage of the crane arm due to the high lifting position, reducing the installation requirements, and facilitating repeated lifting. At the same time, this lifting method can realize the directional vertical lifting of the single piece 100, which is convenient for rapid assembly at high altitudes; of course, at the beginning, the single piece 100 at the head end of the blade can be directly installed on the cabin at the top of the tower, and then each single piece 100 is lifted and assembled. Therefore, when the cabin is on the ground, the assembly work of the three blade heads and the installation work of the pulley block can be carried out, and after the lifting is completed, the pulley block can be left on the cabin, or workers can climb onto the cabin to disassemble it; of course, the single piece 100 at the head end of the blade can also be installed directly on the cabin, but by lifting, such as Figure 5 As shown, however, this requires workers to climb onto the nacelle to assemble the first single piece 100. The specific assembly method can be conventional, which will not be described here. Since the insert 101 is no longer provided on the single piece 100 at the tail end of the blade, it can be hoisted by conventional methods such as bundling. In actual use, since the tower, nacelle and other structures need to be hoisted and assembled by a crane, the crane can work in the initial stage of the wind turbine generator assembly without participating in the hoisting of the blades. It should be pointed out that in the actual lifting process, since the weight of the blades is relatively large, the corresponding single pieces 100 on the three blades can be assembled one by one. That is, when the single piece 100 on a blade is assembled, the main shaft of the cabin is rotated to change the position of the blade, and the corresponding single piece 100 on the next blade is lifted and assembled, thereby reducing the difficulty of rotating the main shaft of the cabin, reducing the difficulty of assembly, and ensuring that the overall center of gravity of the cabin is relatively stable.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A single-blade device for a wind turbine generator set, characterized in that: It comprises a plurality of single pieces arranged in a straight line, and two adjacent single pieces are connected by a plug-in structure; The plug-in structure includes an insert installed on one of the single pieces and a socket opened on an adjacent single piece, and the insert and the socket are used in coordination; The opening position of the jack is set as a guide surface, and the connection position between the plug body and the single piece is set as a transition surface used in conjunction with the guide surface; The plug-in structure also includes a clamping unit for locking the plug-in body and the inner wall of the plug hole.

2. A single-blade device for a wind turbine generator set according to claim 1, characterized in that: The interior of the single sheet can be filled, and the filling material is at least one of a lightweight foam material, a honeycomb material, a lightweight wood or a wood composite material.

3. A single-blade device for a wind turbine generator set according to claim 1, characterized in that: The clamping unit comprises a plurality of protrusions, each of which comprises at least two chambers relatively opened inside the inserting body, a sliding body is slidably arranged in each of the chambers, one side of the sliding body is connected to the inner wall of the chamber by an elastic body, and the other side of the sliding body is provided with a wedge block slidably extending to the outside of the inserting body; The inner side wall of the insertion hole is provided with a side hole used in conjunction with each wedge block.

4. A single-blade device for a wind turbine generator set according to claim 3, characterized in that: Each of the wedges in the protrusion is retracted into the chamber by magnetic control.

5. A single-blade device for a wind turbine generator set according to claim 1, characterized in that: At least three lifting positions are arranged on the front and back sides of the insert.

6. A single-blade device for a wind turbine generator set according to claim 5, characterized in that: The horizontal plane projection and the vertical plane projection of each of the hoisting positions are distributed in a polygonal manner.

7. A single-blade device for a wind turbine generator set according to claim 5 or 6, characterized in that: The hoisting position is a hoisting hole and a hoisting part detachably arranged with the hoisting hole.

8. A method for hoisting a single-blade device of a wind turbine generator set, applicable to a single-blade device of a wind turbine generator set as claimed in any one of claims 1 to 7, characterized in that: The steps include: Move the tractor to the work area and pass several lifting ropes on the tractor through the pulley block structure; Hang the pulley block structure on the top of the tower, and let several suspension ropes hang down to the ground; Connect each end of the lifting rope to the lifting position on the single piece; The tractor pulls several lifting ropes simultaneously to transport and lift the single piece; During the lifting process of the single piece, a plurality of lifting ropes surround the single piece and block it, and the direction of the single piece is defined by the plurality of lifting ropes; When the single piece is hoisted to the specified position, the two single pieces are connected through the plug-in structure.

Images