Bonding reinforcing structure for sandwich area and web of wind turbine blade

Abstract

The utility model discloses a wind turbine blade sandwich area and web plate bonding reinforcing structure which comprises a shell, a web plate and an anti-layering structure, the shell comprises a first core material and a glass fiber laying layer wrapping the outer surface of the first core material, the web plate comprises a connecting end, the web plate is vertically arranged, and the connecting end is connected with the web plate. The web plate is provided with a connecting end, the connecting end is fixedly connected with a glass fiber laying layer of the shell, the layering-resistant structure is arranged in the shell and corresponds to the connecting end of the web plate, and the layering-resistant structure is used for resisting relative movement generated between the first core material and the glass fiber laying layer. According to the anti-layering structure, the first core material in the shell can be resisted by the anti-layering structure, displacement generated by relative movement between the first core material and the glass fiber laying layer is reduced, out-of-plane stress strain between the first core material and the glass fiber laying layer is reduced, and safety is improved; the traditional auxiliary beam design is omitted, the material consumption is reduced, and the weight of the blade is reduced; the structure of simply wrapping the first core material is realized, and the process difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind turbine blade structures, and in particular relates to a wind turbine blade sandwich area and web bonding reinforcement structure. Background Art

[0002] In recent years, with wind and thermal power generating units at the same price, the industry trend has been to increase rotor area, pursue larger turbines, and reduce the cost of electricity. As a key component of a wind turbine, blades must be longer and have a larger swept area, but this also increases their weight. The pursuit of lightweight blades to reduce manufacturing costs has become an inevitable trend in the wind turbine blade industry.

[0003] The web structure is the primary shear stress-bearing component in a blade, hence its name. The webs of large wind turbine blades are made of composite materials, with the upper and lower edges bonded to the corresponding auxiliary beams of the blade's main body. However, current mainstream blade structural design and verification methods utilize shell element modeling and analysis, which fails to reflect the out-of-plane stress conditions at the web bond angle. Due to the weak peel strength between the core material and the glass fiber, the web must be bonded to the blade shell beam, avoiding the core area. Traditional designs to address the breathing effect, to maintain an out-of-plane safety margin and limited by thickness transitions, incorporate thicker auxiliary beams into the original shell core area to support the auxiliary web bonding. While this approach effectively addresses the issue of core-to-glass debonding, the auxiliary beams provide little strength improvement, resulting in low material utilization. Furthermore, the core material is chamfered to control the height difference between the auxiliary beams and the core material on either side, increasing both weight and production complexity.

[0004] Based on this, the applicant considered designing a bonding reinforcement structure between the core area and the web of a wind turbine blade. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a bonding reinforcement structure between the core region and the web of a wind turbine blade.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A wind turbine blade sandwich area and web bonding reinforcement structure includes a shell, a web and an anti-delamination structure, the shell includes a first core material and a glass fiber layer wrapped on the outer surface of the first core material, the web includes a connecting end, the web is vertically arranged, and the connecting end is fixedly connected to the glass fiber layer of the shell, the anti-delamination structure is arranged in the shell and corresponds to the connecting end of the web, and the anti-delamination structure is used to resist the relative movement between the first core material and the glass fiber layer.

[0008] Compared with the prior art, the utility model has the following advantages in the wind turbine blade sandwich region and web bonding reinforcement structure:

[0009] By setting up the shell, web and anti-delamination structure, the first core material in the shell can be resisted by the anti-delamination structure, reducing the displacement caused by the relative movement between the first core material and the glass fiber layer, reducing the out-of-plane stress and strain between the first core material and the glass fiber layer, and improving safety; the traditional auxiliary beam design is eliminated, the material consumption is reduced, and the weight of the blade is reduced; a simple wrapping of the first core material layer structure is achieved, the auxiliary beam installation step is removed, and the process difficulty of the web bonding area is reduced.

[0010] The above-mentioned wind turbine blade sandwich region and web bonding reinforcement structure has the advantages of simple structure and easy implementation, is suitable for installation and use in existing wind turbine blades, has low cost of use, and can improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 for Figure 1 A partial magnified view of the anti-delamination structure in the shell;

[0013] Description of Reference Numerals

[0014] 110 first core material, 120 glass fiber layer;

[0015] 210 second core material, 220 board layer, 230 bonding angle plate;

[0016] 310 first isolation plate, 320 second isolation plate;

[0017] 400 adhesive. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] When implementing: Figure 1 and Figure 2 As shown, a wind turbine blade sandwich area and web bonding reinforcement structure includes a shell, a web and an anti-delamination structure, the shell includes a first core material 110 and a glass fiber layer 120 wrapped on the outer surface of the first core material 110, the web includes a connecting end, the web is vertically arranged, and the connecting end is fixedly connected to the glass fiber layer 120 of the shell, the anti-delamination structure is arranged in the shell and corresponds to the connecting end of the web, and the anti-delamination structure is used to resist the relative movement between the first core material 110 and the glass fiber layer 120.

[0020] Compared with the prior art, the utility model has the following advantages in the wind turbine blade sandwich region and web bonding reinforcement structure:

[0021] By setting up the shell, web and anti-delamination structure, the first core material 110 in the shell can be resisted by the anti-delamination structure, reducing the displacement caused by the relative movement between the first core material 110 and the glass fiber layer 120, reducing the out-of-plane stress and strain between the first core material 110 and the glass fiber layer 120, and improving safety; the traditional auxiliary beam design is eliminated, the material consumption is reduced, and the weight of the blade is reduced; a simple wrapped core material layer structure is realized, the auxiliary beam installation step is removed, and the process difficulty of the web bonding area is reduced.

[0022] The above-mentioned wind turbine blade sandwich region and web bonding reinforcement structure has the advantages of simple structure and easy implementation, is suitable for installation and use in existing wind turbine blades, has low cost of use, and can improve efficiency.

[0023] In this embodiment, Figure 1 and Figure 2 As shown, the anti-delamination structure includes a first isolation plate 310 and a second isolation plate 320, and the first isolation plate 310 and the second isolation plate 320 are relatively vertically arranged in the glass fiber ply 120, and the first isolation plate 310 and the second isolation plate 320 divide the first core material 110 into three side-by-side sections in the cross section, and the upper end and the lower end of the first isolation plate 310 and the second isolation plate 320 are respectively connected to the glass fiber ply 120 on the upper surface and the glass fiber ply 120 on the lower surface of the shell.

[0024] In this way, by setting the first isolation plate 310 and the second isolation plate 320, the first isolation plate 310 and the second isolation plate 320 divide the first core material 110 into three sections. During the movement of the blade, the displacement effect of the first core material 110 and the glass fiber layer 120 at the other two ends when each section of the first core material 110 and the glass fiber layer 120 produce relative movement is reduced. The structure is simple and easy to implement.

[0025] In this embodiment, Figure 1 and Figure 2 As shown, the web includes a second core material 210 and a board layer 220 wrapped around the outer surface of the second core material 210 .

[0026] In this way, by providing the second core material 210 and the board layer 220 wrapped on the outer surface of the second core material 210, the web can be connected to the glass fiber layer 120 through the board layer 220, and the web structure is simple and easy to implement.

[0027] In this embodiment, Figure 1 and Figure 2As shown, an adhesive 400 is provided between the plate layer 220 at the connection end of the web and the glass fiber ply 120 of the shell.

[0028] In this way, the adhesive 400 is provided to make the connection between the web plate layer 220 and the glass fiber layer 120 more stable.

[0029] In this embodiment, Figure 1 and Figure 2 As shown, a bonding angle plate 230 is provided at the connecting end of the web, and the bonding angle plate 230 includes a first end and a second end relative to each other, the first end is connected to the edge of the connecting end of the web, and the second end protrudes laterally outward, and the connecting end of the web and the bonding angle plate 230 are jointly fixed to the shell glass fiber ply 120.

[0030] In this way, by providing the bonding angle plate 230, the connection area between the web and the glass fiber layer 120 can be increased without increasing the space and weight occupied by the web, thereby further increasing the stability and reliability of the connection.

[0031] In this embodiment, Figure 1 and Figure 2 As shown, adhesive 400 is provided between the connection end and the bonding angle plate 230 and the glass fiber ply 120 .

[0032] In this way, the adhesive 400 is provided to make the connection between the bonding angle plate 230 and the web connecting end and the glass fiber ply 120 more stable.

[0033] In this embodiment, Figure 1 and Figure 2 As shown, a circular chamfer is provided between the bonding angle plate 230 and the side wall of the web.

[0034] In this way, by providing the arc chamfer, the bending resistance between the bonding angle plate 230 and the side wall of the web is made more reliable, the breakage rate is reduced, and the reliability is improved.

[0035] The above are only preferred implementations of the present invention. It should be pointed out that various modifications and improvements made by those skilled in the art without departing from the present technical solution should also be deemed to fall within the scope of protection required by the claims.

Claims

1. A wind turbine blade sandwich region and web bonding reinforcement structure, characterized by: The invention comprises a shell, a web and an anti-delamination structure, wherein the shell comprises a first core material and a glass fiber ply wrapped on the outer surface of the first core material, the web comprises a connecting end, the web is vertically arranged, and the connecting end is fixedly connected to the glass fiber ply of the shell, the anti-delamination structure is arranged in the shell and corresponds to the connecting end of the web, and the anti-delamination structure is used to resist the relative movement between the first core material and the glass fiber ply.

2. The wind turbine blade core region and web bonding reinforcement structure according to claim 1, characterized in that: The anti-delamination structure includes a first isolation plate and a second isolation plate, which are relatively vertically arranged in the glass fiber ply. The first isolation plate and the second isolation plate divide the first core material into three side-by-side sections in the cross section, and the upper and lower ends of the first isolation plate and the second isolation plate are respectively connected to the glass fiber ply on the upper surface and the glass fiber ply on the lower surface of the shell.

3. The wind turbine blade core region and web bonding reinforcement structure according to claim 2, characterized in that: The web includes a second core material and a board layer wrapped around an outer surface of the second core material.

4. The wind turbine blade core region and web bonding reinforcement structure according to claim 3, characterized in that: An adhesive is provided between the plate layer at the connection end of the web and the glass fiber ply of the shell.

5. The wind turbine blade sandwich region and web bonding reinforcement structure according to claim 3, characterized in that: A bonding angle plate is provided at the connecting end of the web, and the bonding angle plate includes a first end and a second end relative to each other, the first end is connected to the edge of the connecting end of the web, and the second end protrudes laterally outward, and the connecting end of the web and the bonding angle plate are jointly fixed to the glass fiber ply.

6. The wind turbine blade core region and web bonding reinforcement structure according to claim 5, characterized in that: Adhesive is provided between the connecting end and the bonding angle plate and the glass fiber ply.

7. The wind turbine blade sandwich region and web bonding reinforcement structure according to claim 5, characterized in that: A circular chamfer is provided between the bonding angle plate and the side wall of the web.

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