Core material structure and wind power generation device

Abstract

The utility model discloses a core material structure and a wind power generation device. The core material structure comprises a flexible part and a core material plate, the core material plate is provided with a first side wall face and a second side wall face which are oppositely arranged, a plurality of first cutting grooves and second cutting grooves are formed in the first side wall face, and the first cutting grooves and the second cutting grooves are arranged at an angle and intersect with each other. The core material plate is divided into a plurality of core material blocks through the first cutting grooves and the second cutting grooves, the second side wall face is covered with a flexible piece, the core material structure has a rolling state and a laying state, in the rolling state, the core material structure is wound from one end of the core material structure to the other end in the length direction of the core material plate, and in the laying state, the core material plate is wound from the other end of the core material structure. The first side wall surface or the side wall surface of the flexible part is suitable for being attached to a target surface. According to the technical scheme, transportation and laying of the core material structure are facilitated, meanwhile, the height difference between the core material blocks can be reduced, the stability of the overall structure of the blade is enhanced, and therefore the quality of the blade is improved, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of core materials, and in particular to a core material structure and a wind power generation device. Background Technology

[0002] Core material structures possess characteristics such as lightweight, high strength, good conformability, and ease of construction, making them applicable in wind power, aerospace, shipbuilding, and construction. Taking wind power as an example, the blade, as the core component of a wind turbine, directly affects wind energy conversion efficiency and turbine stability. Blades typically consist of an outer shell, core material, and connecting components, with the structural design and performance of the core material playing a crucial role in the overall performance of the blade.

[0003] In existing technologies, blade core materials are typically laid out by splicing core material blocks one by one. This method has serious drawbacks. On the one hand, large-blade blades require a large number of core material blocks to be spliced, making manual laying slow and prone to misalignment, resulting in low work efficiency and increased production costs. On the other hand, splicing core material blocks individually creates discontinuous joints between adjacent blocks, resulting in height differences and steps. During blade operation, stress concentration points are easily formed at these steps, leading to blade breakage, affecting blade quality and service life, and also increasing equipment maintenance costs and downtime risks. Utility Model Content

[0004] The purpose of this application is to provide a core material structure and a wind power generation device, which facilitates the transportation and laying of the core material structure, reduces the height difference between core material blocks, enhances the stability of the overall blade structure, thereby improving blade quality and extending service life.

[0005] In a first aspect, this utility model provides a core material structure, comprising:

[0006] Flexible components;

[0007] The core material board has a first side wall and a second side wall that are arranged opposite to each other. A plurality of first cutting grooves and second cutting grooves are formed on the first side wall. The first cutting grooves and the second cutting grooves are arranged at an angle and intersect each other. The core material board is divided into a plurality of core material blocks by the first cutting grooves and the second cutting grooves. The flexible component is covered on the second side wall.

[0008] The core material structure has a wound state and a laid state. In the wound state, the core material is wound from one end to the other along the length direction of the core material board. In the laid state, the first side wall or the side wall of the flexible member is adapted to fit against the target surface.

[0009] Beneficial effects: In this core material structure, the core material board is divided into several core material blocks by several first cutting grooves and second cutting grooves, and a flexible component is covered on the second side wall. The flexible component connects the several core material blocks, so that the core material structure has a rolled-up state and a laid-out state.

[0010] During transportation, the core material structure can be wound along its length from one end to the other, transforming into a compact coiled state. Compared to traditional large core materials or loose core material blocks, the coiled core material structure significantly reduces space occupation, making it easier to store and handle, effectively reducing the risk of bumps and damage during transportation, while improving logistics efficiency and saving transportation costs.

[0011] Taking wind turbine blade manufacturing as an example, when laying the core material structure, operators only need to place the core material structure in its wound state on the target surface of the blade. After locating the starting position, a simple pushing or flicking motion will allow the core material structure to unfold naturally, quickly completing the switch from the wound state to the laid state, and smoothly adhering the first sidewall or flexible component sidewall to the target surface. Unlike traditional processes that require piecing together a large number of core material blocks one by one, this method effectively avoids the positional confusion that can easily occur with manual laying, significantly improving laying efficiency and shortening operation time.

[0012] Furthermore, when the target surface of the blade has a local large curvature, the flexible components in the core material structure can fit tightly against the complex curvature of the blade and form a smooth transition between adjacent core material blocks. This effectively reduces the height difference between core material blocks, reduces stress concentration caused by discontinuous connection of core material blocks, enhances the stability of the overall blade structure, thereby improving blade quality and extending service life.

[0013] In summary, this core material structure has the advantages of efficient transportation, convenient installation, and enhanced blade performance, significantly improving the manufacturing quality and efficiency of wind turbine blades.

[0014] In one alternative embodiment, the core block is projected from the first sidewall in a direction toward the second sidewall, wherein the projected area of ​​the first sidewall of the core block is smaller than the projected area of ​​the second sidewall.

[0015] Beneficial effects: When the projected area of ​​the first side wall of the core material block is smaller than the projected area of ​​the second side wall, when the core material block is laid on the target surface, the smaller projected area of ​​the first side wall can make the splicing between multiple core material blocks tighter, which can better adapt to some areas with special shapes or space constraints, thereby effectively reducing the height difference between core material blocks, enhancing the stability of the overall blade structure, thereby improving blade quality and extending service life.

[0016] Furthermore, this shape design allows the core material block to form a trapezoidal structure after installation, which helps to better transfer pressure to the supporting structure and reduces the possibility of displacement or toppling of the core material block due to external forces, thereby enhancing the stability of the entire core material structure. Especially under conditions of high pressure or dynamic loads, such as wind turbine blades in strong winds or ships under the impact of waves, this structure can better maintain its integrity and performance.

[0017] In one alternative embodiment, the width of the first cutting groove is greater than the width of the second cutting groove.

[0018] Beneficial effects: The design of the first cutting groove being wider than the second cutting groove optimizes the resin infusion process. By utilizing the flow guiding characteristics of the wider groove, it ensures that the resin quickly and evenly impregnates the core material structure, improving the quality of composite molding. On the other hand, when adapting to the complex curvature surface of the blade, the wider first cutting groove allows adjacent core material blocks to fit tightly together, thereby reducing the height difference between adjacent core material blocks, enhancing the stability of the overall blade structure, improving blade quality, and extending service life.

[0019] In one alternative embodiment, the width of the first cutting groove gradually decreases from the first sidewall surface toward the second sidewall surface.

[0020] Beneficial effects: When injecting resin into the core material structure, a wider inlet (near the first side wall) facilitates the rapid entry of resin into the first cutting groove, while the gradually narrowing groove width guides the resin to flow in a specific direction, making it more evenly distributed in the core material structure. This helps to avoid excessive resin accumulation in local areas, while ensuring that the resin can fully cover all parts of the core material block, improving the resin's impregnation effect on the core material, thereby enhancing the overall performance of the core material structure.

[0021] In the blade's curvature region, as adjacent core material blocks are installed, the gradually narrowing slot width exerts a certain squeezing effect on them, allowing them to fit more tightly together during installation. This further reduces the height difference and gaps between them. This helps enhance the overall stability of the blade structure, reduces stress concentration caused by loose structures, improves the blade's reliability under wind loads and other external forces, and ultimately extends the blade's service life.

[0022] In one alternative implementation, the first cutting groove is a V-shaped groove.

[0023] Beneficial effects: The V-groove has a relatively simple shape and is easy to achieve through cutting, milling, and other processes during the core material structure manufacturing process. Compared with some complex-shaped cut grooves, the machining accuracy of V-grooves is easier to control, which can reduce machining costs and improve production efficiency, thus facilitating large-scale production.

[0024] In one optional implementation, a plurality of the first cutting grooves are arranged in parallel at intervals, and a plurality of the second cutting grooves are arranged in parallel at intervals.

[0025] Beneficial effects: The parallel and spaced first and second cutting grooves are easier to achieve during processing. Regardless of whether mechanical cutting, laser cutting, or other processing methods are used, parallel cutting grooves can be processed repeatedly at certain intervals after setting the processing parameters once, which helps to improve processing efficiency and accuracy, and reduce processing costs.

[0026] Furthermore, the parallel, spaced first cutting grooves ensure uniform distribution of the injected resin across the core structure. The resin flows along each parallel first cutting groove, covering a larger area and preventing localized areas of excessive or insufficient resin. This guarantees that all parts of the core structure are fully impregnated with resin, thereby improving the overall performance consistency. Simultaneously, the parallel spacing of the second cutting grooves further refines the resin flow path, resulting in a more uniform and precise distribution of resin within the core structure, thus enhancing the impregnation effect.

[0027] In one alternative embodiment, the first cutting groove is provided along the length direction of the core material board, and the second cutting groove is provided along the width direction of the core material board.

[0028] Beneficial effects: The first cutting groove is set along the length direction, providing the resin with the main flow channel along the length of the core material board. This helps the resin to be evenly distributed over a longer distance, which is especially suitable for some core material structures with high performance requirements in the length direction, such as the main beam of wind turbine blades. It can ensure that the resin fully impregnates the core material in the length direction, thereby improving the strength and stability in this direction.

[0029] The second cutting groove is set along the width direction and is perpendicular to the first cutting groove, forming a crisscrossing resin flow network. This allows the resin to diffuse well in the width direction, avoiding uneven resin distribution and ensuring that the core board receives sufficient resin impregnation in all parts, thereby improving the uniformity of overall performance.

[0030] In one alternative embodiment, the flexible element is fiberglass cloth.

[0031] Beneficial effects: Fiberglass cloth is made of glass fiber, which has high strength and modulus. This allows the fiberglass cloth to provide good mechanical support in the core structure, enhance the overall strength and stiffness of the core structure, and improve the core material's ability to resist external damage. For example, in applications such as wind turbine blades, it can effectively withstand various loads that the blades experience during operation.

[0032] As a flexible component, fiberglass cloth can be used in various environmental conditions and is not easily damaged by external environmental factors, thus improving the durability and service life of the core structure. For example, in humid or corrosive environments, fiberglass cloth can maintain its stable performance, ensuring the reliability of the core structure.

[0033] In one alternative embodiment, the flexible element is fixed to the second sidewall surface by an adhesive layer.

[0034] Beneficial effects: The adhesive layer provides strong adhesion, ensuring a tight bond between the flexible component and the second sidewall. Under various external forces, such as tension, bending, or vibration, the flexible component remains firmly attached to the second sidewall, preventing detachment or displacement, thus guaranteeing the stability and reliability of the structure.

[0035] Furthermore, the adhesive layer can fill the tiny gaps between the flexible component and the second sidewall, creating a good seal. This helps prevent external moisture, dust, gases, and other substances from entering the structure, avoiding corrosion, contamination, or other damage to internal components, and improving the protective performance of the core material structure.

[0036] Secondly, this utility model also provides a wind power generation device, comprising:

[0037] blade;

[0038] The core material structure, wherein at least one core material structure is provided, wherein in the laid state, the side wall surface of the flexible element is attached to the inner wall surface of the blade.

[0039] Beneficial effects: When laying the core material structure, the operator only needs to place the core material structure in the wound state on the inner wall of the blade. After finding the starting position, the core material structure can be naturally unfolded by a simple pushing or flicking action, which can quickly complete the switch from the wound state to the laying state. The first side wall or the side wall of the flexible part is flat and attached to the inner wall of the blade, which improves the laying efficiency and shortens the operation time.

[0040] Furthermore, when there are large-radius curved surfaces on the inner wall of the blade, the flexible components in the core material structure can fit tightly against the complex curved surface of the blade and form a smooth transition between adjacent core material blocks. This effectively reduces the height difference between core material blocks, reduces stress concentration caused by discontinuous connection of core material blocks, enhances the stability of the overall blade structure, thereby improving blade quality and extending service life.

[0041] In one optional embodiment, the core material structure is provided in multiple ways, and the multiple core material structures are arranged sequentially along the width direction of the blade;

[0042] With the core material structure laid on the inner wall of the blade, the length direction of the core material structure is parallel to the length direction of the blade.

[0043] Beneficial effects: Multiple core material structures arranged sequentially along the blade's width provide uniform support, ensuring effective support for all parts of the blade when subjected to aerodynamic forces, reducing localized deformation and stress concentration. Simultaneously, the core material structures' length direction is parallel to the blade's length direction, facilitating the uniform transmission and dispersion of forces along the blade's length, improving the blade's overall bending and torsional strength, enhancing its structural stability under complex operating conditions, and extending its service life.

[0044] Multiple core material structures are arranged sequentially along the width of the blade, and their length direction is parallel to the length direction of the blade. This facilitates the laying and installation of the core material structures during the blade manufacturing process, thereby improving production efficiency and reducing production costs. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the core material structure in the winding state according to one embodiment provided in this application;

[0047] Figure 2 This is a schematic diagram of the core material structure in the laying state according to one embodiment provided in this application;

[0048] Figure 3 yes Figure 2 A partially enlarged schematic diagram of the core material structure;

[0049] Figure 4This is a schematic diagram of the core material structure in the laying state from another perspective in one embodiment provided in this application;

[0050] Figure 5 This is a schematic diagram of the core material structure laid inside the blade in one embodiment provided in this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1000. Core material structure;

[0053] 100. Flexible components;

[0054] 200, Core material board; 210, First side wall; 211, First cutting groove; 212, Second cutting groove; 220, Second side wall; 230, Core material block;

[0055] 2000, Leaf. Detailed Implementation

[0056] In related technologies, blade core materials are typically laid out by splicing core material blocks one by one. This method has serious drawbacks. On the one hand, large-blade blades require a large number of core material blocks to be spliced, making manual laying slow and prone to misalignment, resulting in low work efficiency and increased production costs. On the other hand, splicing core material blocks individually creates discontinuous joints between adjacent blocks, resulting in height differences and steps. During blade operation, stress concentration points are easily formed at these steps, leading to blade breakage, affecting blade quality and service life, and also increasing equipment maintenance costs and downtime risks.

[0057] To address this issue, the inventors of this disclosure pre-assemble the core material blocks piece by piece on a specialized mold and fix them with back adhesive before transferring them to the blade production mold for installation. While this method ensures the fit between the core material and the blade's curved surface, the assembled core material remains a large, monolithic structure, posing a transportation challenge. If a scheme involving transporting smaller blocks to the site for assembly and installation were adopted, a significant amount of manpower would be required for secondary assembly and installation, extending the construction period and resulting in high labor costs, making it difficult to meet the demands of efficient wind turbine blade production.

[0058] Based on this, the inventors of this disclosure redesigned the core material structure. The core material board is divided into several core material blocks by several first cutting grooves and second cutting grooves, and a flexible element is covered on the second side wall. The flexible element connects the several core material blocks, so that the core material structure has a rolled-up state and a laid-out state.

[0059] During transportation, the core material structure can be wound along its length from one end to the other, transforming into a compact rolled-up state. Compared to traditional large core materials or loose core material blocks, the rolled-up core material structure significantly reduces space occupation, facilitating storage and handling, and saving transportation costs. When laying the core material structure, a simple pushing or turning motion allows it to unfold naturally, quickly switching from a wound to a laid state, ensuring the first sidewall or flexible component sidewall is smoothly adhered to the target surface. Unlike traditional methods that require piecing together numerous core material blocks one by one, the laying process effectively avoids the positional confusion that can occur with manual laying, significantly improving laying efficiency and shortening operation time.

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0061] To solve the above technical problems, the following will be combined with... Figures 1 to 5 The following describes embodiments of the present invention.

[0062] According to embodiments of the present invention, on the one hand, such as Figures 1 to 4 As shown, a core material structure is provided, including a flexible element 100 and a core material plate 200.

[0063] Specifically, such as Figure 2 As shown, the core material board 200 has a first side wall 210 and a second side wall 220, which are arranged opposite to each other. A plurality of first cutting grooves 211 and second cutting grooves 212 are formed on the first side wall 210, wherein the first cutting grooves 211 and second cutting grooves 212 are arranged at an angle, and the first cutting grooves 211 and second cutting grooves 212 are arranged to intersect each other.

[0064] Specifically, such as Figure 2 As shown, the core material board 200 is divided into several core material blocks 230 by the first cutting groove 211 and the second cutting groove 212.

[0065] Specifically, such as Figure 2 and Figure 4 As shown, a flexible element 100 is provided on the second side wall 220 of the core material board 200.

[0066] Specifically, such as Figures 1 to 4 As shown, the core material board 200 has a wound state and a laid state. In the wound state, the core material board 200 is wound from one end of the core material structure 1000 to the other end along the length direction of the core material structure 1000. In the laid state, the first sidewall 210 or the sidewall of the flexible member 100 is adapted to adhere to the target surface.

[0067] In this core material structure, the core material board 200 is divided into several core material blocks 230 by several first cutting grooves 211 and second cutting grooves 212, and a flexible member 100 is covered on the second side wall 220. The several core material blocks 230 are connected by the flexible member 100, so that the core material structure 1000 has a rolled-up state and a laid-out state.

[0068] During transportation, the core material structure 1000 can be wound along its length from one end to the other, transforming into a compact coiled state. Compared to traditional large core materials or loose core material blocks 230, the coiled core material structure 1000 significantly reduces space occupation, making it easier to store and handle, effectively reducing the risk of bumps and damage during transportation, while improving logistics efficiency and saving transportation costs.

[0069] Taking the manufacturing of a wind turbine blade 2000 as an example, when laying the core material structure 1000, the operator only needs to place the core material structure 1000 in the wound state on the target surface of the blade 2000. After finding the starting position, the core material structure 1000 can be naturally unfolded by a simple pushing or turning action, quickly completing the switch from the wound state to the laying state, and making the first side wall 210 or the side wall of the flexible part 100 flat and attached to the target surface. In the laying process, there is no need to splice a large number of core material blocks 230 one by one as in the traditional process, which effectively avoids the problem of position confusion that is easy to occur in manual laying, significantly improves laying efficiency, and shortens operation time.

[0070] Furthermore, when the target surface of the blade 2000 has a local large-radius curved surface, since the core material structure 1000 has a flexible component 100, the flexible component 100 can closely fit the complex curved surface of the blade 2000 and form a smooth transition between adjacent core material blocks 230. This effectively reduces the height difference between core material blocks 230, reduces stress concentration caused by discontinuous connection of core material blocks 230, enhances the stability of the overall structure of the blade 2000, thereby improving the quality of the blade 2000 and extending its service life.

[0071] In summary, the core material structure 1000 has the advantages of efficient transportation, convenient installation, and enhanced blade performance, significantly improving the manufacturing quality and efficiency of wind turbine blades 2000.

[0072] Specifically, the core material structure 1000 can be applied in aerospace, wind power, construction, and shipbuilding fields. In this embodiment, no specific restrictions are placed on the application scenarios of the core material structure 1000.

[0073] It should be noted that the target surface can be an aircraft wing, a ship deck, a building wall, etc. In this embodiment of the application, no specific restrictions are placed on the type of target surface.

[0074] Specifically, the flexible element 100 can be a fiber fabric, a flexible membrane, etc. In this embodiment, the type of flexible element 100 is not specifically limited.

[0075] Specifically, the first cutting groove 211 and the second cutting groove 212 can be arranged perpendicular to each other or at an acute angle. In this embodiment, the angle between the first cutting groove 211 and the second cutting groove 212 is not specifically limited.

[0076] Specifically, the core material block 230 can be any existing shape such as a triangle, rectangle, or parallelogram. In this embodiment, the shape and structure of the core material block 230 are not specifically limited.

[0077] For example, the core material block 230 is square or rectangular, which is convenient for processing, manufacturing and laying. It is widely used in fields with high requirements for shape regularity, such as wind turbine blades 2000, building decoration, and automotive interiors. It can make the surface after laying more flat and beautiful, enhance the overall mechanical properties of the structure, and avoid stress concentration.

[0078] In one embodiment, such as Figure 2 and Figure 3 As shown, the core material block 230 is projected from the first side wall 210 in the direction toward the second side wall 220, and the projected area of ​​the first side wall 210 of the core material block 230 is smaller than the projected area of ​​the second side wall 220.

[0079] When the projected area of ​​the first side wall 210 of the core block 230 is smaller than the projected area of ​​the second side wall 220, when the core block 230 is laid on the target surface, the smaller projected area of ​​the first side wall 210 can make the splicing between multiple core blocks 230 more compact, which can better adapt to some areas with special shapes or space constraints, thereby effectively reducing the height difference between the core blocks 230, enhancing the stability of the overall structure of the blade 2000, thereby improving the quality of the blade 2000 and extending its service life.

[0080] Furthermore, this shape design allows the core block 230 to form a trapezoidal structure after installation, which helps to better transfer pressure to the supporting structure and reduces the possibility of displacement or tilting of the core block 230 due to external forces, thereby enhancing the stability of the entire core structure 1000. Especially under conditions of high pressure or dynamic loads, such as wind turbine blades 2000 in strong wind environments or ships under the impact of waves, it can better maintain its integrity and performance.

[0081] Specifically, a diagonal cutting method can be used to cut from one side of the core block 230 at a certain angle to the other side, thereby forming a shape in which the projected area of ​​the first side wall 210 of the core block 230 is smaller than the projected area of ​​the second side wall 220.

[0082] In one embodiment, such as Figure 3 As shown, the width of the first cutting groove 211 is greater than the width of the second cutting groove 212.

[0083] The design of the first cutting groove 211 being wider than the second cutting groove 212 optimizes the resin infusion process. By utilizing the flow guiding characteristics of the wider groove, it ensures that the resin quickly and evenly impregnates the core material structure 1000, improving the quality of composite molding. On the other hand, when adapting to the complex curved surface of the blade 2000, the wider width of the first cutting groove 211 allows adjacent core material blocks 230 to fit tightly together, thereby reducing the height difference between adjacent core material blocks 230, enhancing the overall structural stability of the blade 2000, and thus improving the quality of the blade 2000 and extending its service life.

[0084] Specifically, in areas where the curvature of the blade 2000 varies significantly, the width of the first cutting groove 211 may need to be adjusted according to the radius of curvature to ensure a tight fit between adjacent core material blocks 230 and reduce the height difference. A smaller radius of curvature may require a larger groove width to accommodate the deformation of the core material block 230 during bending. For example, in areas with a smaller radius of curvature, such as the tip of the blade 2000, the width of the first cutting groove 211 may need to reach 30-60 mm.

[0085] In one embodiment, such as Figure 3 As shown, the width of the first cutting groove 211 gradually decreases from the first side wall 210 toward the second side wall 220.

[0086] When resin is injected into the core structure 1000, the wider inlet (near the first side wall 210) facilitates the rapid entry of resin into the first cutting groove 211, while the gradually narrowing groove width guides the resin to flow in a specific direction, making it more evenly distributed in the core structure 1000. This helps to avoid excessive resin accumulation in local areas, while ensuring that the resin can fully cover all parts of the core block 230, improving the resin's impregnation effect on the core material, thereby enhancing the overall performance of the core structure 1000.

[0087] In the 2000° arc region of the blade, as adjacent core material blocks 230 are installed, the gradually narrowing slot width exerts a certain squeezing effect on the core material blocks 230, allowing them to fit more tightly together during installation. This further reduces the height difference and gap between them. This helps enhance the overall structural stability of the blade 2000, reduces stress concentration caused by loose structures, improves the reliability of the blade 2000 under wind loads and other external forces, and ultimately extends the service life of the blade 2000.

[0088] Furthermore, the gradually decreasing slot width allows for more uniform force transmission in the core material block 230 under stress. From the first side wall 210 to the second side wall 220, as the slot width gradually decreases, the material distribution of the core material block 230 becomes more rational, enabling it to better withstand forces in different directions. During the operation of the blade 2000, it can effectively resist external forces such as bending and shearing, improving the structural strength of the blade 2000 and reducing the risk of failure due to excessive local stress.

[0089] Specifically, the first cutting groove 211 can be a trapezoidal groove, a stepped groove, an arc-shaped groove, etc. In this embodiment, the shape of the first cutting groove 211 is not specifically limited.

[0090] For example, the first cutting groove 211 is an arc-shaped groove. The cross-section of the first cutting groove 211 is arc-shaped, and the groove width gradually decreases in an arc-shaped curve from the first side wall 210 to the second side wall 220. The arc-shaped groove can make the resin flow more smoothly in the groove, reduce flow resistance, and avoid the formation of eddies or stagnation of resin in the groove, thereby improving the impregnation efficiency and uniformity of the resin. In addition, the arc-shaped groove can better adapt to the deformation of the core material block 230 when bending. In the arc region of the blade 2000, it can better match the bending shape of the core material block 230, further reducing the gap and height difference between adjacent core material blocks 230 and enhancing the stability of the structure.

[0091] In one embodiment, such as Figure 3 As shown, the cross-section of the first cutting groove 211 is a V-shaped groove.

[0092] The V-shaped groove allows the resin to flow and diffuse quickly and evenly into the groove along the two side walls of the V during injection. Due to the wide opening of the groove, the resin easily enters and, under the influence of gravity and surface tension, flows along the inclined surface of the V to various parts. This facilitates the resin's full filling of the gaps and voids in the core material structure 1000, ensuring complete resin coverage and improving the impregnation effect.

[0093] In the 2000 arc region of the blade, the V-groove allows two adjacent core material blocks 230 to fit better. The two side walls of the V-groove exert a certain squeezing effect on the core material blocks 230, prompting the adjacent core material blocks 230 to fit tightly together, effectively reducing the height difference and gap between adjacent core material blocks 230, thereby enhancing the overall structural stability of the blade 2000.

[0094] The V-groove has a relatively simple shape and is easily achieved through cutting and milling processes during the machining of the core material structure 1000. Compared to some complex-shaped cut grooves, the machining accuracy of V-grooves is easier to control, which can reduce machining costs and improve production efficiency, thus benefiting large-scale production.

[0095] In one embodiment, such as Figures 1 to 3 As shown, a number of first cutting grooves 211 are arranged in parallel at intervals, and a number of second cutting grooves 212 are arranged in parallel at intervals.

[0096] The parallel-spaced first cutting groove 211 and second cutting groove 212 are easier to implement during processing. Regardless of whether mechanical cutting, laser cutting, or other processing methods are used, parallel cutting grooves can be processed repeatedly at certain intervals after setting the processing parameters once, which helps to improve processing efficiency and accuracy and reduce processing costs.

[0097] Furthermore, the parallel, spaced first cutting grooves 211 ensure uniform distribution of the injected resin across the core structure 1000. The resin flows along each parallel first cutting groove 211, covering a larger area and preventing localized areas of excessive or insufficient resin. This ensures that all parts of the core structure 1000 are adequately impregnated with resin, thereby improving the overall performance consistency. Simultaneously, the parallel, spaced second cutting grooves 212 further refine the resin flow path, resulting in a more uniform and precise distribution of resin within the core structure 1000, thus enhancing the resin's impregnation effect on the core material.

[0098] In one embodiment, such as Figure 2 As shown, the first cutting groove 211 is provided along the length direction of the core material board 200, and the second cutting groove 212 is provided along the width direction of the core material board 200.

[0099] The first cutting groove 211 is set along the length direction, providing the resin with the main flow channel along the length direction of the core material plate 200. This helps the resin to be evenly distributed over a long distance, and is especially suitable for some core material structures 1000 with high performance requirements in the length direction, such as wind turbine blades 2000. It can ensure that the resin is fully impregnated in the core material in the length direction, thereby improving the strength and stability in that direction.

[0100] The second cutting groove 212 is arranged along the width direction and is perpendicular to the first cutting groove 211, forming a crisscrossing resin flow network. This allows the resin to diffuse well in the width direction, avoiding uneven resin distribution and ensuring that the core board 200 receives sufficient resin impregnation in all parts, thereby improving the uniformity of overall performance.

[0101] A first cutting groove 211 is provided along the length of the core material board 200. During processing, a longer processing stroke allows for the production of multiple consecutive first cutting grooves 211 in one operation, improving processing efficiency. Furthermore, the first cutting groove 211 along the length direction is relatively easy to position and control in terms of dimensional accuracy, which helps ensure consistent product quality. A second cutting groove 212 is provided along the width direction. The processing of the second cutting groove 212 along the length direction is independent of that along the width direction, facilitating the separate adjustment and control of the processing parameters for the two second cutting grooves 212.

[0102] Specifically, the first cutting groove 211 in the length direction and the second cutting groove 212 in the width direction facilitate automated processing on the production line. By programming and controlling the movement of the cutting equipment in different directions, efficient and precise cutting processing can be achieved.

[0103] In practical applications, the core material 200 typically bears significant bending and tensile forces along its length. For example, during operation, the wind turbine blade 2000 is subjected to wind forces along its length. Incorporating a first cutting groove 211 along the length direction can better adapt to this stress condition. By rationally designing the shape, size, and spacing of the cutting groove, the mechanical properties of the core material structure 1000 along its length can be optimized, thereby improving the wind resistance and load-bearing capacity of the blade 2000.

[0104] In one embodiment, the flexible element 100 is a fiberglass cloth.

[0105] Fiberglass cloth is made of glass fiber, which has high strength and modulus. This allows the fiberglass cloth to provide good mechanical support in the core structure 1000, enhance the overall strength and stiffness of the core structure 1000, and improve the core material's ability to resist external damage. For example, in applications such as wind turbine blades 2000, it can effectively withstand various loads that the blades 2000 experience during operation.

[0106] As a flexible component 100, fiberglass cloth can be used under various environmental conditions and is not easily damaged by external environmental factors, thus improving the durability and service life of the core structure 1000. For example, in some humid or corrosive environments, fiberglass cloth can maintain its stable performance, ensuring the reliability of the core structure 1000.

[0107] In one embodiment, the flexible element 100 is mounted on the second sidewall 220 via an adhesive layer.

[0108] The adhesive layer provides strong adhesion, ensuring that the flexible component 100 is tightly connected to the second sidewall 220. Under various external forces, such as tension, bending, or vibration, the flexible component 100 remains firmly attached to the second sidewall 220, preventing it from detaching or shifting, thus ensuring the stability and reliability of the structure.

[0109] Furthermore, the adhesive layer can fill the tiny gaps between the flexible component 100 and the second sidewall 220, forming a good sealing effect. This helps prevent external moisture, dust, gases, and other substances from entering the structure, avoiding corrosion, contamination, or other damage to internal components, and improving the protective performance of the core material structure 1000.

[0110] Specifically, the adhesive layer can be epoxy resin adhesive, polyurethane adhesive, silicate adhesive, etc. In the embodiments of this application, the type of adhesive layer is not specifically limited.

[0111] According to an embodiment of the present invention, on the other hand, as... Figures 1 to 5 As shown, a wind power generation device is also provided, including blades 2000 and core structure 1000.

[0112] Specifically, at least one core material structure 1000 is provided, and in the laid state, the side wall surface of the flexible element 100 is attached to the inner wall surface of the blade 2000.

[0113] In this wind power generation device, when laying the core material structure 1000, the operator only needs to place the core material structure 1000 in the wound state on the inner wall of the blade 2000. After finding the starting position, the core material structure 1000 can be naturally unfolded by a simple pushing or flicking action, quickly completing the switch from the wound state to the laying state. The first side wall 210 or the side wall of the flexible part 100 is flatly attached to the inner wall of the blade 2000, improving laying efficiency and shortening operation time.

[0114] Furthermore, when there are large-radius curved surfaces on the inner wall of the blade 2000, the flexible component 100 on the core material structure 1000 can closely fit the complex curved surface of the blade 2000 and form a smooth transition between adjacent core material blocks 230. This effectively reduces the height difference between the core material blocks 230, reduces stress concentration caused by discontinuous connection of the core material blocks 230, enhances the overall structural stability of the blade 2000, thereby improving the quality of the blade 2000 and extending its service life.

[0115] In one embodiment, such as Figure 5 As shown, multiple core material structures 1000 are provided, and the multiple core material structures 1000 are arranged sequentially along the width direction of the blade 2000. Among them, when the core material structures 1000 are laid on the inner wall surface of the blade 2000, the length direction of the core material structures 1000 is parallel to the length direction of the blade 2000.

[0116] Multiple core material structures 1000 are sequentially arranged along the width direction of the blade 2000, providing uniform support force along the width of the blade 2000. This ensures effective support for all parts of the blade 2000 when subjected to aerodynamic forces, reducing localized deformation and stress concentration. Simultaneously, the length direction of the core material structures 1000 is parallel to the length direction of the blade 2000, which helps to evenly transfer and distribute the forces acting on the blade 2000 along its length, improving the overall bending and torsional strength of the blade 2000, enhancing its structural stability under complex operating conditions, and extending its service life.

[0117] Multiple core material structures 1000 are arranged sequentially along the width direction of the blade 2000, and their length direction is parallel to the length direction of the blade 2000. This facilitates the laying and installation of the core material structures 1000 during the manufacturing process of the blade 2000, thereby improving production efficiency and reducing production costs.

[0118] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0119] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0120] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A core material structure, characterized in that, include: Flexible component (100); The core material board (200) has a first side wall (210) and a second side wall (220) arranged opposite to each other. The first side wall (210) has a plurality of first cutting grooves (211) and second cutting grooves (212). The first cutting grooves (211) and the second cutting grooves (212) are arranged at an angle and intersect each other. The core material board (200) is divided into a plurality of core material blocks (230) by the first cutting grooves (211) and the second cutting grooves (212). The flexible member (100) is covered on the second side wall (220). The core material structure (1000) has a wound state and a laid state. In the wound state, the core material structure (1000) is wound from one end to the other along the length direction of the core material plate (200). In the laid state, the first side wall surface (210) or the side wall surface of the flexible member (100) is adapted to fit against the target surface.

2. The core material structure according to claim 1, characterized in that, The core block (230) is projected from the first side wall (210) in a direction toward the second side wall (220), and the projected area of ​​the first side wall (210) of the core block (230) is smaller than the projected area of ​​the second side wall (220).

3. The core material structure according to claim 2, characterized in that, The width of the first cutting groove (211) is greater than the width of the second cutting groove (212).

4. The core material structure according to claim 3, characterized in that, The width of the first cutting groove (211) gradually decreases from the first sidewall (210) toward the second sidewall (220).

5. The core material structure according to claim 4, characterized in that, The first cutting groove (211) is a V-shaped groove.

6. The core material structure according to any one of claims 1 to 5, characterized in that, A plurality of first cutting grooves (211) are arranged in parallel at intervals, and a plurality of second cutting grooves (212) are arranged in parallel at intervals. set up.

7. The core material structure according to claim 6, characterized in that, The first cutting groove (211) is provided along the length direction of the core material board (200), and the second cutting groove (212) is provided along the width direction of the core material board (200).

8. The core material structure according to any one of claims 1 to 5, characterized in that, The flexible component (100) is fiberglass cloth.

9. The core material structure according to claim 8, characterized in that, The flexible component (100) is fixed to the second side wall (220) by an adhesive layer.

10. A wind power generation device, characterized in that, include: Leaf blade (2000); The core material structure according to any one of claims 1 to 9, wherein the core material structure (1000) has at least one component, and in the laid state, the side wall surface of the flexible member (100) is attached to the inner wall surface of the blade (2000).

11. The wind power generation device according to claim 10, characterized in that, The core material structure (1000) is provided in multiple ways, and the multiple core material structures (1000) are arranged sequentially along the width direction of the blade (2000); With the core material structure (1000) laid on the inner wall of the blade (2000), the length direction of the core material structure (1000) is parallel to the length direction of the blade (2000).

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