A wind turbine assembly and method of hoisting

Abstract

The present application relates to the technical field of wind power generation equipment, and particularly relates to a wind turbine generator set split type fairing and hoisting method. The split type fairing comprises a fairing body and a cuff, the fairing body is spliced by a plurality of split pieces, a plurality of cuff mounting portions are arranged on the circumferential side of the fairing body, and the cuff is detachably mounted on the cuff mounting portions of the fairing body. The piece is a laminated plate, the laminated plate comprises a base material, a reinforcing material and a surface coating layer, the base material is glass fiber reinforced plastic, the reinforcing material is carbon fiber cloth, and the surface coating layer is a mixture of polyurethane and epoxy resin. The present application solves the contradictory problem of weight reduction and high strength and rigidity requirement of the fairing, and the problem of too many types of fairings caused by hoisting of various hubs and various sizes of blades.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, and in particular to a segmented fairing for a wind turbine generator and a hoisting method thereof. Background Technology

[0002] The wind turbine fairing is an outer protective cover for the wind turbine hub, protecting the hub and related internal parts from the effects of external climate and pressure, effectively ensuring the normal operation of the wind turbine.

[0003] Existing wind turbine fairings typically use fiberglass reinforced plastic as the main material, and the fairing often reduces weight by decreasing the wall thickness. With the continuous increase in the power and blade diameter of current wind turbines, especially the rapid development of offshore wind power, the size and weight of fairings are becoming increasingly larger. While reducing the thickness can reduce the weight of the component, it also brings defects such as increased fairing deformation, insufficient strength, and decreased reliability.

[0004] Existing wind turbine fairings require specially designed lifting nacelles and interfaces based on the hub mounting interface location. Therefore, different fairings are needed for different hub mounting locations. Additionally, fairings with corresponding blade interface sizes are required for different blade root diameters. These factors result in a wide variety of fairing types, making large-scale production difficult and leading to high unit prices. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a segmented fairing for wind turbine generators, thereby resolving the contradiction between fairing weight reduction and high strength and rigidity requirements, as well as the problem of too many types of fairings caused by various hub hoisting methods and blade sizes.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A segmented fairing for a wind turbine generator includes: a fairing body and cuffs. The fairing body is composed of multiple segmented pieces spliced ​​together. Multiple cuff mounting portions are provided on the periphery of the fairing body, and the cuffs are detachably mounted on the cuff mounting portions of the fairing body. Each piece is a laminate, which includes a base material, a reinforcing material, and a surface coating. The base material is glass fiber reinforced plastic, the reinforcing material is carbon fiber cloth, and the surface coating is a mixture of polyurethane and epoxy resin.

[0008] Optionally, the cover body is divided into a top cover module, a middle module, and a cuff ring module. The top cover module is arranged on the top of the cover body, the cuff ring module is arranged around the cuff mounting part, and the middle module is located between the two cuff ring modules.

[0009] Optionally, the top cover module includes a front top cover piece, a top cover A piece, and a top cover B piece, with the top cover A piece and top cover B piece alternately arranged around the periphery of the front top cover piece; the middle module includes a middle A piece, a middle B piece, a middle C piece, and a middle D piece arranged in sequence; the cuff module includes a left side portion and a right side portion located at the cuff mounting portion, with the left side portion including a left sleeve A piece, a left sleeve B piece, a left sleeve C piece, and a left sleeve D piece arranged in sequence, and the right side portion including a right sleeve A piece, a right sleeve B piece, a right sleeve C piece, and a right sleeve D piece arranged in sequence.

[0010] Optionally, the sheet includes a protective plate and a flange plate, wherein the protective plate is an arc-shaped panel and the flange plate is a flat panel, and the flange plate is disposed around the protective plate.

[0011] Optionally, two adjacent plates can be detachably connected via a flange.

[0012] Optionally, the hoisting position of one or at least two adjacent corresponding wheel hubs of the middle A plate, middle B plate, middle C plate and middle D plate.

[0013] Optionally, the glass fiber reinforced plastic comprises the following raw materials in weight percentages: 60% glass fiber, 20% epoxy resin and 20% unsaturated polyester resin.

[0014] Optionally, the reinforcing material comprises the following raw materials in weight percentages: 60% carbon fiber and 40% epoxy resin.

[0015] Optionally, the surface coating comprises the following raw materials by weight percentage: 89.5% epoxy resin, 10% polyurethane, and 0.5% anti-yellowing agent.

[0016] This invention also provides a method for hoisting a segmented fairing for a wind turbine generator as described above. Before hoisting, one or at least two of the middle A segment, middle B segment, middle C segment, and middle D segment are disassembled. After hoisting, the corresponding segments are reinstalled in their original positions.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] Compared to existing methods that reduce wall thickness, this invention proposes a novel way to reduce the weight of the fairing. The fairing panels are constructed as laminates composed of a base material, reinforcing material, and a surface coating. This reduces the number of layers, resulting in lighter weight and less material usage, while improving the overall bending and tensile strength. This achieves weight reduction while maintaining high strength and rigidity, extending service life. Furthermore, the fairing utilizes a modular design, allowing for the assembly and disassembly of the panels to meet the lifting requirements of various wheel hubs. A cuff module is specifically designed for the blade interface; the cuff is detachably mounted on the cuff mounting section of the fairing body, and can be replaced to accommodate different blade root diameters. Therefore, through modular and segmented design, it can adapt to various wheel hub lifting methods and blades with different root diameters, thereby increasing the modular production capacity of the fairing and reducing its unit price.

[0019] Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the split structure of the flow guide shield according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the deflector area division according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the air deflector sleeve mounting part according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the cuff structure according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the B-piece structure in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a laminated plate according to an embodiment of the present invention;

[0027] In the diagram: 1. Front top cover piece; 2. Top cover A piece; 3. Top cover B piece; 4. Left sleeve A piece; 5. Middle A piece; 6. Right sleeve A piece; 7. Left sleeve B piece; 8. Middle B piece; 9. Right sleeve B piece; 10. Left sleeve C piece; 11. Middle C piece; 12. Right sleeve C piece; 13. Left sleeve D piece; 14. Middle D piece; 15. Right sleeve D piece; 16. Cuff; 17. Top cover module; 18. Cuff ring module; 19. Middle module; 20. Cuff mounting part; 21. Connecting plate; 22. Flange plate; 23. Protective plate; 24. Flange plate; 25. Surface coating; 26. Base material; 27. Reinforcing material;

[0028] The distances or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. Detailed Implementation

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The terms "installed," "connected," "linked," "fixed," etc., in this invention should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral structure; they may refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they may refer to an internal connection between two elements, or the interaction between two elements. Those of ordinary skill in the art can understand the specific meaning of the terms in this invention according to the specific circumstances.

[0030] As wind turbine fairings become increasingly larger and heavier, while reducing thickness can decrease component weight, it also leads to increased fairing deformation, insufficient strength, and decreased reliability. Furthermore, the wide variety of fairing types available to meet diverse requirements makes large-scale production difficult and results in high unit prices. Therefore, given the current state of existing technologies, developing a segmented fairing for wind turbine generators is an urgent problem to be solved.

[0031] like Figures 1-5 As shown, one embodiment of the present invention proposes a segmented wind turbine fairing, comprising: a fairing body and cuffs 16. The fairing body is composed of multiple segmented pieces spliced ​​together. Multiple cuff mounting portions 20 are provided on the periphery of the fairing body. The cuffs 16 are detachably mounted on the cuff mounting portions 20 of the fairing body. The segments are laminated boards, such as… Figure 6As shown, the laminate includes a matrix material 26, a reinforcing material 27, and a surface coating 25. The matrix material is glass fiber reinforced plastic, the reinforcing material is carbon fiber cloth, and the surface coating is a mixture of polyurethane and epoxy resin.

[0032] Compared to existing methods that reduce wall thickness, this invention proposes a novel approach to reduce fairing weight. The fairing panels are constructed as laminates composed of a base material, reinforcing material, and a surface coating. This reduces the number of layers, lightens the weight, and minimizes material usage, thereby improving the overall bending and tensile strength. While reducing weight, it maintains high strength and rigidity requirements, extending service life. Furthermore, the fairing utilizes a modular design, allowing for the assembly and disassembly of individual panels to meet the lifting requirements of various wheel hubs. A cuff 16 module is specifically designed for the blade interface; the cuff 16 is detachably mounted on the cuff mounting section 20 of the fairing body. By replacing the cuff 16, it can accommodate interface requirements with different blade root diameters. Therefore, through modular and segmented design, it can adapt to various wheel hub lifting methods and blades with different root diameters, thereby increasing the modular production capacity of the fairing and reducing its unit price.

[0033] Based on the overall external shape of the fairing, the segmentation positions of each structural module are determined as follows: Figure 2 As shown, the cover body is divided into a top cover module 17, a middle module 19 and a cuff module 18. The top cover module 17 is arranged on the top of the cover body, the cuff module 18 is arranged around the cuff mounting part 20, and the middle module 19 is located between the two cuff modules 18.

[0034] Specifically, such as Figure 1 As shown, the top cover module 17 includes a front top cover piece 1, a top cover A piece 2, and a top cover B piece 3, with the top cover A piece 2 and top cover B piece 3 alternately arranged around the periphery of the front top cover piece 1; the middle module 19 includes a middle A piece 5, a middle B piece 8, a middle C piece 11, and a middle D piece 14 arranged in sequence; the cuff module 18 includes a left side portion and a right side portion located at the cuff mounting portion 20, with the left side portion including a left sleeve A piece 4, a left sleeve B piece 7, a left sleeve C piece 10, and a left sleeve D piece 13 arranged in sequence, and the right side portion including a right sleeve A piece 6, a right sleeve B piece 9, a right sleeve C piece 12, and a right sleeve D piece 15 arranged in sequence.

[0035] Understandably, in other specific implementations, other partitioning methods can be adopted according to the specific needs of the actual product, provided that the functional requirements of reliable and fixed inter-module functionality can be met.

[0036] The sheet includes a protective plate 23 and a flange plate 24, but the shape of the sheet varies at different locations. For example... Figure 5The diagram shows the structure of the B-piece 8. The protective plate 23 is an arc-shaped panel, and the flange plate 24 is a flat plate. The flange plate 24 is disposed around the protective plate 23. Two adjacent pieces are detachably connected via the flange plate 24. Specifically, the flanges on both sides can be connected using fasteners.

[0037] like Figure 4 The diagram shows a structural schematic of the cuff 16, which includes a connecting plate 21 and a flange plate 22. The connecting plate 21 is an annular flat plate, and the flange plate 22 is a cylindrical plate. One end of the flange plate 22 is connected to the inner ring of the connecting plate 21. Figure 3 The image shows the cuff mounting part 20 of the cover body. The cuff mounting part 20 is a planar structure, and the connecting plate 21 is mounted on the cuff mounting part 20 by fasteners.

[0038] The hoisting positions of one or at least two adjacent corresponding wheel hubs of the middle A-piece 5, middle B-piece 8, middle C-piece 11, and middle D-piece 14. By removing some or all of the components of the middle A-piece 5, middle B-piece 8, middle C-piece 11, and middle D-piece 14, the hoisting requirements of various wheel hubs can be met.

[0039] Furthermore, the glass fiber reinforced plastic comprises the following raw materials by weight percentage: 60% glass fiber, 20% epoxy resin, and 20% unsaturated polyester resin. The glass fiber reinforced plastic is injection molded to obtain the matrix material. The reinforcing material (carbon fiber cloth) comprises the following raw materials by weight percentage: 60% carbon fiber and 40% epoxy resin. The carbon fiber cloth is pre-impregnated with epoxy resin, then laid onto the glass fiber reinforced plastic and impregnated with epoxy resin to obtain the reinforcing material. The surface coating comprises the following raw materials by weight percentage: 89.5% epoxy resin, 10% polyurethane, and 0.5% anti-yellowing agent.

[0040] Laminate manufacturing process:

[0041] Matrix material: 1 layer of 450g / m 2 Chopped strand mat and 1 layer of 1250g / m 2 The composite felt is used as the base material. Using an injection molding process, a 1:1 mixture of epoxy resin and unsaturated polyester resin is injected into the fabric until it is completely impregnated, then cooled and cured. After curing, the product is demolded.

[0042] Reinforcing material: Carbon fiber cloth was selected as the reinforcing material, 200g / m² per layer. 2 The carbon fiber cloth is impregnated with epoxy resin and laid onto the inner surface of the matrix material. The carbon fiber is impregnated with epoxy resin at a weight ratio of 6:4. After the carbon fiber cloth is fully impregnated, it is cooled and cured.

[0043] Surface coating: Polyurethane and epoxy resin are selected as the surface coating. The surface coating is composed of the following raw materials by weight percentage: 89.5% epoxy resin, 10% polyurethane, 0.5% anti-yellowing agent, and the coating thickness is 0.8 mm.

[0044] The air deflector laminate provided by this invention features a simple and reasonable layering structure. Compared to existing technologies, it requires fewer layers, reduces weight by more than 30%, and uses less material. The main body has a bending strength of no less than 380 MPa and a tensile strength of no less than 335 MPa, which is significantly higher than the parameters of existing fiberglass (bending strength 280 MPa, tensile strength 250 MPa), exhibiting superior strength and rigidity. In summary, the air deflector of this invention features high strength, high rigidity, corrosion resistance, light weight, and strong expandability, extending its service life from 20 years to no less than 25 years.

[0045] Based on a segmented fairing, a hoisting method is provided. Before hoisting, one or at least two adjacent segments of the middle A, B, C, and D sections are disassembled. After hoisting, the corresponding sections are reinstalled in their original positions. The location of the intermediate module is used as the hoisting position, i.e., the middle A, B, C, and D sections. During hoisting, relevant sections of the intermediate module are removed as needed, accommodating the hoisting requirements of different types of wheel hubs. After hoisting, the relevant sections of the intermediate module are reinstalled, satisfying the hoisting requirements of various wheel hubs.

[0046] In summary, this invention employs a novel approach to reduce the weight of the fairing while maintaining its strength and reliability. Furthermore, the modular, segmented design of the fairing allows it to adapt to various hub mounting methods and blades with different root diameters, thereby increasing the modular production capacity of the fairing and reducing its unit price.

[0047] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A segmented fairing for a wind turbine generator, characterized in that, include: The cover body and cuffs are provided. The cover body is composed of multiple separate pieces spliced ​​together. Multiple cuff mounting parts are provided around the cover body. The cuffs are detachably mounted on the cuff mounting parts of the cover body. The sheet is a laminate, which includes a matrix material, a reinforcing material, and a surface coating. The matrix material is glass fiber reinforced plastic, the reinforcing material is carbon fiber cloth, and the surface coating is a mixture of polyurethane and epoxy resin. The cover body is divided into a top cover module, a middle module and a cuff ring module. The top cover module is arranged on the top of the cover body, the cuff ring module is arranged on the periphery of the cuff mounting part, and the middle module is located between the two cuff ring modules. The top cover module includes a front top cover piece, a top cover A piece, and a top cover B piece, with the top cover A piece and top cover B piece alternately arranged around the periphery of the front top cover piece; the middle module includes a middle A piece, a middle B piece, a middle C piece, and a middle D piece arranged in sequence; the cuff module includes a left portion and a right portion located at the cuff mounting part, with the left portion including a left sleeve A piece, a left sleeve B piece, a left sleeve C piece, and a left sleeve D piece arranged in sequence, and the right portion including a right sleeve A piece, a right sleeve B piece, a right sleeve C piece, and a right sleeve D piece arranged in sequence; The cuffs are detachably mounted on the cuff mounting part of the cover body, and can be adapted to the interface requirements of different leaf root diameters by changing the cuffs. The cuff includes a connecting plate and a flange plate. The connecting plate is an annular flat plate, and the flange plate is a cylindrical plate. One end of the flange plate is connected to the inner ring of the connecting plate. The cuff mounting part is a planar structure, and the connecting plate is mounted on the cuff mounting part by fasteners. Before hoisting, disassemble one or at least two adjacent pieces of the middle A, middle B, middle C, and middle D pieces. After hoisting, reinstall the corresponding pieces back in their original positions.

2. The segmented fairing for a wind turbine generator as described in claim 1, characterized in that, The sheet includes a protective plate and a flange plate. The protective plate is an arc-shaped panel, and the flange plate is a flat panel. The flange plate is disposed around the perimeter of the protective plate.

3. The segmented fairing for a wind turbine generator as described in claim 2, characterized in that, The two adjacent plates are detachably connected by a flange plate.

4. The segmented fairing for a wind turbine generator as described in claim 3, characterized in that, The hoisting position of one or at least two adjacent corresponding wheel hubs of the middle A piece, middle B piece, middle C piece and middle D piece.

5. The segmented fairing for a wind turbine generator as described in claim 1, characterized in that, The glass fiber reinforced plastic comprises the following raw materials in weight percentages: 60% glass fiber, 20% epoxy resin and 20% unsaturated polyester resin.

6. The segmented fairing for a wind turbine generator as described in claim 1, characterized in that, The reinforcing material comprises the following raw materials by weight percentage: 60% carbon fiber and 40% epoxy resin.

7. The segmented fairing for a wind turbine generator as described in claim 1, characterized in that, The surface coating comprises the following raw materials by weight percentage: 89.5% epoxy resin, 10% polyurethane, and 0.5% anti-yellowing agent.

Images