Method for eliminating edge warping defects of glass fiber main and auxiliary beams of wind power blade

Abstract

The invention provides a method for eliminating edge warping defects of glass fiber main and auxiliary beams of a wind power blade, and relates to the technical field of wind power blades. The method comprises the following steps that a glass fiber layer and a demolding cloth layer are sequentially laid in a mold from bottom to top; pressing strips are placed at corners on two sides of the mold, vertical sections of the pressing strips are contacted with the side wall of the mold, and horizontal sections of the pressing strips are contacted with the upper surface of the demolding cloth layer. The demolding cloth layer can be pressed downwards through the pressing strip, the edge of the demolding cloth layer is prevented from being tilted, the edge warping defect of the glass fiber main and auxiliary beam is remarkably improved, the product quality is improved, the blade performance is improved, the service life is prolonged, after the glass fiber main and auxiliary beam is demolded, workers do not need to maintain the glass main and auxiliary beam, the forming period of the glass fiber main and auxiliary beam is effectively shortened, and the production efficiency is improved. The labor intensity of workers is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blades, and in particular to a method for eliminating edge warping defects of glass fiber main and auxiliary beams of wind turbine blades. Background Art

[0002] Wind turbine blades are components of wind turbines. Each planed surface on the blade is designed as an airfoil. From the root to the tip of the blade, its thickness, twist angle and chord length have a certain distribution pattern, and have a good aerodynamic shape. The main and auxiliary beams of wind turbine blades are generally prefabricated with glass fiber in a special mold to reduce the quality risk of integral infusion molding with the skin. The main and auxiliary beams of glass fiber are the most critical components of wind turbine blades because of their high rigidity and strong performance. The main and auxiliary beams of glass fiber are a kind of glass fiber reinforced plastic formed by laying unidirectional yarn glass fiber in a special mold and introducing epoxy infusion resin through a vacuum infusion process. The main and auxiliary beams of glass fiber bear most of the load of the blade and provide the blade with rigidity, i.e., bending and torsion resistance.

[0003] At present, the glass fiber main and auxiliary beams used are mainly prefabricated in special molds. For example, the Chinese patent with the authorization announcement number CN107225778B discloses a method for forming a blade main beam. The forming method includes the following steps: laying the first-level reinforcement material layer, demoulding cloth and guide net on the blade main beam mold in sequence, performing the first vacuum infusion molding to form a semi-formed blade main beam; placing the semi-formed blade main beam in the blade main mold shell; laying the second-level reinforcement material layer above the semi-formed blade main beam, laying the third-level reinforcement material layer, demoulding cloth and guide net on the blade main mold shell in sequence, and performing the second vacuum infusion molding. The forming method divides the large megawatt-class blade main beam with a thicker reinforcement material layer into two moldings, solves the problem of local cloth layer envelope of the blade main beam, improves the molding quality of the blade main beam, and thus improves the quality of the blade.

[0004] However, due to the small requirements for the bonding tolerance of the mold retaining edge, the glass fiber processing tolerance, and the glass fiber laying tolerance, beam edge warping defects are prone to occur after the layer is poured using the existing technology. After the pre-curing is completed, the glass fiber main and auxiliary beams need to be repaired, which consumes a lot of manpower and material resources. In addition, the performance of the glass fiber main and auxiliary beams will be reduced after the repair and cannot be fully restored. Summary of the invention

[0005] The present invention provides a method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade, which is used to solve the technical problem that the warping defect of the beam is easy to occur after the ply is poured, and after the pre-curing is completed, the main and auxiliary glass fiber beams need to be repaired and processed, which costs a lot of manpower and material resources.

[0006] In order to solve the above technical problems, the present invention discloses a method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade, comprising the following steps:

[0007] Lay the fiberglass layer and the release cloth layer in the mold from bottom to top;

[0008] Layers are placed at the corners on both sides of the mold, with the vertical section of the layer in contact with the side wall of the mold, and the horizontal section of the layer in contact with the upper surface of the demoulding cloth layer.

[0009] Preferably, the glass fiber layer is made by laying glass fibers layer by layer in a mold according to preset process parameters.

[0010] Preferably, the release cloth layer is formed by laying the release cloth on the surface of the glass fiber layer, and the width of the release cloth is greater than the width of the glass fiber layer.

[0011] Preferably, the layering strip comprises a light chamfered material layer and a porous membrane, and the porous membrane is wrapped around the light chamfered material layer.

[0012] Preferably, the lightweight chamfered material layer is made of any one of polyethylene terephthalate, polyvinyl chloride, balsa wood, polymethyl methacrylate, polyetherimide, acrylonitrile-styrene, polystyrene, and fiber-reinforced composite materials.

[0013] Preferably, the mold is adhesively connected to the side wall of the molding.

[0014] Preferably, a vacuum system is arranged above the demoulding cloth layer, and the air in the mold is extracted through the vacuum system to provide a vacuum negative pressure environment for glue injection, and then resin glue is poured. The resin glue adopts epoxy resin. After the pouring is completed, pre-curing molding is carried out. After pre-curing molding, the lightweight chamfering material layer is removed.

[0015] Preferably, a chamfer is provided on the side of the light chamfered material layer away from the mold, and a thickness of 0.1-0.3 mm is left on the horizontal section of the light chamfered material layer away from the end of the mold.

[0016] Preferably, a laying device is used to lay the demoulding cloth on the surface of the glass fiber layer, the laying device includes a support plate, the support plate is arranged above the two molds, support legs are arranged at four corners of the lower surface of the support plate, moving wheels are arranged at the bottom of the support legs, an opening is opened in the center of the support plate, a mounting plate is arranged on the support plate, the mounting plate is connected to the support plate through a connecting mechanism, a first electric push rod is arranged on the front side wall of the mounting plate, a driving block is arranged at the lower end of the first electric push rod, two sliding blocks are symmetrically arranged at the lower position of the front side wall of the mounting plate, the rear side wall of the sliding block is slidably connected to the front side wall of the mounting plate left and right, a driving rod is arranged between the sliding block and the driving block, one end of the driving rod is hingedly connected to the upper surface of the sliding block, and the other end of the driving rod is hingedly connected to the side wall of the driving block, a mounting column is arranged on the lower surface of one end of the two sliding blocks close to each other, and a pressure roller is rotatably arranged at the lower end of the mounting column.

[0017] Preferably, the connecting mechanism includes two connecting plates, which are symmetrically arranged on the left and right sides of the mounting plate, and a second electric push rod is arranged on the lower surface of the connecting plate, and the lower end of the second electric push rod is connected to the upper surface of the support plate.

[0018] The technical solution of the present invention has the following advantages: The present invention provides a method for eliminating the warping defects of the main and auxiliary glass beams of a wind turbine blade, which relates to the technical field of wind turbine blades, and includes the following steps: laying a glass fiber layer and a demoulding cloth layer in sequence from bottom to top in the mold; placing pressure strips at the corners on both sides of the mold, with the vertical section of the pressure strip in contact with the side wall of the mold, and the horizontal section of the pressure strip in contact with the upper surface of the demoulding cloth layer. In the present invention, the demoulding cloth layer can be pressed down by the pressure strip to avoid the edge of the demoulding cloth layer from warping, significantly improving the warping defects of the main and auxiliary glass beams, improving product quality, and enhancing blade performance and service life. Moreover, after the main and auxiliary glass beams are demoulded, the staff does not need to repair the main and auxiliary glass beams, which effectively shortens the molding cycle of the main and auxiliary glass beams, reduces the labor intensity of the staff, and improves production efficiency.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A schematic diagram of a method for eliminating edge warping defects of glass fiber main and auxiliary beams of a wind turbine blade according to the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of a laying device in a method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to the present invention;

[0024] Figure 3 A method for eliminating the warping defects of the main and auxiliary glass fiber beams of a wind turbine blade according to the present invention Figure 2 A magnified view of the structure in the middle.

[0025] In the figure: 1. demoulding cloth layer; 2. glass fiber layer; 3. porous membrane; 4. light chamfering material layer; 5. mold; 6. support plate; 7. support leg; 8. opening; 9. mounting plate; 10. first electric push rod; 11. drive block; 12. slider; 13. drive rod; 14. mounting column; 15. pressure roller; 16. connecting plate; 17. second electric push rod; 18. third electric push rod; 19. moving shell; 20. sliding hole; 21. first rack; 22. return spring; 23. second rack; 24. gear; 25. moving column; 26. support block; 27. guide column; 28. guide groove. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Example 1

[0029] The embodiment of the present invention provides a method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade, such as Figure 1 As shown, the following steps are included:

[0030] A glass fiber layer 2 and a demoulding cloth layer 1 are laid in the mold 5 from bottom to top in sequence. The glass fiber layer 2 is formed by laying glass fibers layer by layer in the mold 5 according to preset process parameters. The demoulding cloth layer 1 is formed by laying demoulding cloth on the surface of the glass fiber layer 2. The width of the demoulding cloth is greater than that of the glass fiber layer 2.

[0031] Beads are placed at the corners on both sides of the mold 5 , with the vertical section of the bead in contact with the side wall of the mold 5 and the horizontal section of the bead in contact with the upper surface of the release cloth layer 1 .

[0032] The working principle and beneficial effects of the above technical solution are as follows: firstly, a glass fiber layer 2 is laid in the mold 5, and the glass fiber layer 2 is formed by laying glass fibers in the mold 5 according to preset process parameters, and then a demoulding cloth is laid on the glass fiber layer 2, and the width of the demoulding cloth is greater than the width of the glass fiber layer 2. After the demoulding cloth is laid, a demoulding cloth layer 1 is obtained, and then a layer is placed at the corners on both sides of the mold 5. The layer is located in the mold 5, and the layer includes at least one vertical section and one horizontal section. The vertical section of the layer contacts the inner wall of the corner of the mold 5, and the horizontal section of the layer contacts the upper surface of the demoulding cloth layer 1. The pressure strips can be used to press down the edges of the demoulding cloth layer 1 on both sides to prevent the edges of the demoulding cloth layer 1 from warping, significantly improving the warping defects of the glass fiber main and auxiliary beams, improving product quality, and enhancing the performance and service life of the blades. In addition, after the glass fiber main and auxiliary beams are demoulded, the staff does not need to repair the glass main and auxiliary beams, reducing the time for staff to repair defects after the glass fiber main and auxiliary beams are demoulded, effectively shortening the molding cycle of the glass fiber main and auxiliary beams, reducing the labor intensity of the staff, and improving production efficiency. The above-mentioned scheme has a simple and reasonable structural design, is convenient to operate, and is easy to implement, which reduces the difficulty of production.

[0033] Example 2

[0034] On the basis of Example 1, Figure 1 As shown, the layering strip includes a light chamfered material layer 4 and a porous membrane 3, and the porous membrane 3 is wrapped around the light chamfered material layer 4;

[0035] The light chamfering material layer 4 is made of any one of polyethylene terephthalate, polyvinyl chloride, balsa wood, polymethyl methacrylate, polyetherimide, acrylonitrile-styrene, polystyrene, and fiber-reinforced composite materials;

[0036] The mold 5 is glued to the side wall of the layer strip.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the layer includes a lightweight chamfered material layer 4 with a porous membrane 3 fully wrapped on the outside. Common materials for the lightweight chamfered material layer 4 include polyethylene terephthalate (PET), polyvinyl chloride (PVC), balsa wood (BALSA), polymethyl methacrylate (PMI), polyetherimide (PEI), acrylonitrile-styrene (SAN), polystyrene (PS), fiber reinforced composite materials, etc. On the one hand, the mechanical properties of the layer can be improved to ensure that the layer can exert a stable downward pressure on the demolding cloth layer 1 to avoid the edge of the demolding cloth layer 1 from warping. On the other hand, the material cost of the lightweight chamfered material layer 4 is relatively low, which can reduce the manufacturing cost of wind turbine blades. In order to improve the stability of the layer, the side wall of the layer can be glued to the inner wall of the mold 5 by spraying glue to avoid displacement during the installation process.

[0038] Example 3

[0039] On the basis of Example 2, a vacuum system is further included, which is arranged above the demoulding cloth layer 1, and the air in the mold 5 is extracted by the vacuum system to provide a vacuum negative pressure environment for glue injection, and then the resin glue is poured, and pre-curing molding is performed after the pouring is completed;

[0040] The resin glue adopts epoxy resin;

[0041] After pre-curing and molding, the light chamfering material layer 4 is removed.

[0042] The working principle and beneficial effects of the above technical solution are as follows: after the demoulding cloth layer 1 is laid, a vacuum system is arranged above the demoulding cloth layer 1, and the vacuum system includes a vacuum film and an exhaust device. The vacuum film is laid first for sealing, and then the vacuum pre-tightening is performed through the exhaust device. During the tightening process, the horizontal section of the lightweight chamfered material layer 4 of the layering strip is used to press down the demoulding cloth layer 1, so as to avoid the edge position of the demoulding cloth layer 1 from warping, thereby reducing the warping defects after the main and auxiliary beams of the glass fiber are formed. The porous structure of the porous membrane 3 is helpful for the complete extraction of gas, thereby improving the vacuuming effect. After the pressure maintenance is qualified, the mold is pressed. Epoxy resin is poured into the vacuum environment of the tool 5. During the pouring process, since the lightweight chamfered material layer 4 is wrapped with the porous membrane 3 on the outside, the resin glue can flow to the demoulding cloth layer 1 through the holes of the porous membrane 3, which will not affect the pouring process and ensure the pouring quality. After the pouring is completed, the temperature is gradually increased to solidify and form. After pre-curing and forming, the lightweight chamfered material layer 4 can be smoothly removed through the isolation effect of the porous membrane 3, and the removal is convenient, which further improves the production efficiency. The lightweight chamfered material layer 4 is completely removed to avoid the lightweight chamfered material layer 4 affecting the blade performance, further improving the production quality and service life of the blade.

[0043] Example 4

[0044] On the basis of Example 3, a chamfer is provided on the side of the light chamfered material layer 4 away from the mold 5, and a thickness of 0.1-0.3 mm is left on the horizontal section of the light chamfered material layer 4 away from the mold 5.

[0045] The working principle and beneficial effects of the above technical solution are as follows: a chamfer is set on the side of the lightweight chamfered material layer 4 away from the mold 5, which facilitates the fitting of the vacuum film and the outer wall of the pressure strip during the vacuum tightening process, and a thickness of 0.1 mm-0.3 mm is retained at the end of the horizontal section of the lightweight chamfered material layer 4 away from the mold 5. The retained thickness is adjusted according to actual production to avoid indentation on the demolding cloth layer 1 during the pressing process of the pressure strip.

[0046] Example 5

[0047] On the basis of Example 4, Figure 2 , Figure 3As shown, a laying device is used to lay a demoulding cloth on the surface of the glass fiber layer 2, and the laying device includes a support plate 6, which is arranged above the two molds 5, and support legs 7 are arranged at four corners of the lower surface of the support plate 6, and moving wheels are arranged at the bottom of the support legs 7. An opening 8 is opened in the center of the support plate 6, and a mounting plate 9 is arranged on the support plate 6. The mounting plate 9 is connected to the support plate 6 through a connecting mechanism. A first electric push rod 10 is arranged on the front side wall of the mounting plate 9, and a driving block 11 is arranged at the lower end of the first electric push rod 10. Two sliders 12 are symmetrically arranged at the lower position of the front side wall of the mounting plate 9, and the rear side wall of the slider 12 is slidably connected to the front side wall of the mounting plate 9 left and right. A driving rod 13 is arranged between the slider 12 and the driving block 11, and one end of the driving rod 13 is hingedly connected to the upper surface of the slider 12, and the other end of the driving rod 13 is hingedly connected to the side wall of the driving block 11. A mounting column 14 is arranged on the lower surface of one end of the two sliders 12 close to each other, and a pressure roller 15 is rotatably arranged at the lower end of the mounting column 14;

[0048] The connecting mechanism includes two connecting plates 16 symmetrically arranged on the left and right sides of the mounting plate 9 . A second electric push rod 17 is arranged on the lower surface of the connecting plate 16 , and the lower end of the second electric push rod 17 is connected to the upper surface of the support plate 6 .

[0049] The working principle and beneficial effects of the above technical solution are as follows: when preparing the demoulding cloth layer 1, the demoulding cloth is first laid on the glass fiber layer 2, and then the laying device is moved above the demoulding cloth, the supporting legs 7 are located outside the mold 5, and the position of the supporting plate 6 is adjusted by the moving wheel so that the opening 8 is aligned with the demoulding cloth, and then the second electric push rod 17 is started, and the second electric push rod 17 drives the mounting plate 9 to move downward through the connecting plate 16 until both the pressure rollers 15 are in contact with the upper surface of the demoulding cloth, and then the first electric push rod 10 is started, and the first electric push rod 10 extends downward to drive the driving block 11 to move downward, The driving block 11 drives the slider 12 to slide toward the second electric push rod 17 through the driving rod 13, and the slider 12 drives the pressure roller 15 to roll along the surface of the stripping cloth through the mounting column 14, so that the stripping cloth is flat, which solves the problem of unevenness of the stripping cloth layer 1, further reduces the production defects of the main and auxiliary beams of glass fiber, and improves the product quality; after the stripping cloth is flat, the first electric push rod 10 and the second electric push rod 17 return to their original positions in turn, so that the pressure roller 15 is separated from the surface of the stripping cloth, and the position of the pressure roller 15 can be adjusted by the moving wheel, which is convenient for processing different positions of the stripping cloth and improving production efficiency.

[0050] Example 6

[0051] On the basis of Example 5, Figure 3As shown, a support mechanism is arranged on one side away from each other of the two mounting columns 14, and the support mechanism includes a third electric push rod 18, and the third electric push rod 18 is arranged on the side wall of the mounting column 14, and a moving shell 19 is arranged at the lower end of the third electric push rod 18, and a sliding hole 20 is arranged on the bottom wall of the moving shell 19, and a first rack 21 is slidably arranged on the upper inner wall of the moving shell 19, and the first rack 21 is connected to the side wall of the mounting column 14 through a reset spring 22, and a second rack 23 is slidably arranged on the lower inner wall of the moving shell 19, and a rotating shaft is arranged between the first rack 21 and the second rack 23, and the front and rear ends of the rotating shaft are rotatably connected to the inner wall of the moving shell 19, and a gear 24 is arranged on the rotating shaft, and the gear 24 is respectively connected to the first rack 21 and the second rack 23. The rack 23 is meshed, and a movable column 25 is provided at one end of the second rack 23 close to the mounting column 14. The side wall of the movable column 25 is connected to the end of the second rack 23 close to the mounting column 14 for sliding up and down. A support block 26 is provided at the lower end of the movable column 25. The support block 26 is in the shape of a right-angled triangle. An inclined surface is provided on the side of the support block 26 away from the mounting column 14. A guide column 27 is provided at the upper end of the movable column 25. The guide column 27 is slidably provided in a guide groove 28. The guide groove 28 is provided on the inner wall of the movable shell 19. The guide groove 28 includes a transverse section and an inclined section. The inclined section is located at the end of the transverse section away from the mounting column 14. The height of the end of the inclined section away from the mounting column 14 is higher than the height of the end of the inclined section close to the mounting column 14.

[0052] The working principle and beneficial effects of the above technical solution are as follows: as the mounting post 14 moves toward the mold 5, the pressure roller 15 pushes the wrinkles on the surface of the demoulding cloth toward the direction of the pressure strip, and the mounting post 14 drives the moving shell 19 to move toward the pressure strip. When the first rack 21 contacts the side wall of the pressure strip, as the mounting post 14 continues to move, the first rack 21 moves toward the mounting post 14 and pushes the pressure strip to make close contact with the mold 5. The sliding of the first rack 21 drives the gear 24 to rotate, and the rotation of the gear 24 drives the second rack 23 to slide toward the direction of the pressure strip. The second rack 23 drives the support block 26 to move toward the pressure strip through the moving post 25. A preset chamfer is reserved on the side of the pressure strip away from the mold 5. When the support block 26 contacts the bottom of the pressure strip, the support block 26 can be inserted under the pressure strip through the preset chamfer. When the guide post 27 slides to the inclined section of the guide groove 28, the support block 26 can lift the pressure strip. The wrinkles pushed by the pressure roller 15 can be eliminated under the pressure strip, making the stripping cloth smoother, and then the first electric push rod 10 retracts, and under the action of the return spring 22, the first rack 21 contacts the side wall of the pressure strip, so that the pressure strip is tightly fitted with the side wall of the mold 5 until the first rack 21 is separated from the pressure strip. During this process, the support block 26 slowly descends, and after contacting the stripping cloth, it slides in the direction away from the pressure strip, so that the pressure strip is pressed against the surface of the stripping cloth again. The position of the support block 26 can be flexibly adjusted by the third electric push rod 18, so that the support block 26 is fitted with or separated from the surface of the stripping cloth. By setting up a supporting mechanism, the wrinkles of the stripping cloth can be prevented from accumulating between the pressure strip and the pressure roller 15, which effectively eliminates the wrinkles on the surface of the stripping cloth, improves the flatness of the stripping cloth layer 1, ensures product quality, and does not require manual inspection during the wrinkle elimination process, further reducing the labor intensity of the staff and improving production efficiency.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade, characterized in that: The following steps are involved: Laying a glass fiber layer (2) and a demoulding cloth layer (1) in sequence from bottom to top in a mold (5); Layering strips are placed at the corners on both sides of the mold (5), with the vertical section of the layering strip in contact with the side wall of the mold (5) and the horizontal section of the layering strip in contact with the upper surface of the demoulding cloth layer (1).

2. A method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 1, characterized in that: The glass fiber layer (2) is made by laying glass fibers layer by layer in a mold (5) according to preset process parameters.

3. The method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 1, characterized in that: The demoulding cloth layer (1) is formed by laying the demoulding cloth on the surface of the glass fiber layer (2), and the width of the demoulding cloth is greater than the width of the glass fiber layer (2).

4. The method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 1, characterized in that: The layering strip comprises a light chamfered material layer (4) and a porous membrane (3), wherein the porous membrane (3) is wrapped around the light chamfered material layer (4).

5. A method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 4, characterized in that: The light chamfered material layer (4) is made of any one of polyethylene terephthalate, polyvinyl chloride, balsa wood, polymethyl methacrylate, polyetherimide, acrylonitrile-styrene, polystyrene, and fiber-reinforced composite materials.

6. A method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 4, characterized in that: The mould (5) is connected to the side wall of the layer strip by adhesive bonding.

7. A method for eliminating edge warping defects of glass fiber main and auxiliary beams of wind turbine blades according to claim 4, characterized in that: The method also includes arranging a vacuum system above the demoulding cloth layer (1), extracting air from the mold (5) through the vacuum system, providing a vacuum negative pressure environment for glue injection, and then injecting resin glue liquid, wherein the resin glue liquid uses epoxy resin, and performing pre-curing molding after the injection is completed. After the pre-curing molding, the lightweight chamfering material layer (4) is removed.

8. A method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 7, characterized in that: A chamfer is provided on the side of the light chamfered material layer (4) away from the mold (5), and a thickness of 0.1-0.3 mm is left on the end of the horizontal section of the light chamfered material layer (4) away from the mold (5).

9. The method for eliminating the warping defect of the main and auxiliary glass fiber beams of a wind turbine blade according to claim 3, characterized in that: A laying device is used to lay a demoulding cloth on the surface of a glass fiber layer (2), the laying device comprising a support plate (6), the support plate (6) being arranged above two molds (5), support legs (7) being arranged at four corners of the lower surface of the support plate (6), moving wheels being arranged at the bottom of the support legs (7), an opening (8) being arranged at the center of the support plate (6), a mounting plate (9) being arranged on the support plate (6), the mounting plate (9) being connected to the support plate (6) through a connecting mechanism, a first electric push rod (10) being arranged on the front side wall of the mounting plate (9), a driving mechanism being arranged at the lower end of the first electric push rod (10), and a driving mechanism being arranged at the lower end of the first electric push rod (10). A movable block (11) is provided, and two sliders (12) are symmetrically arranged at the lower position of the front side wall of the mounting plate (9); the rear side wall of the slider (12) is slidably connected to the front side wall of the mounting plate (9) left and right; a driving rod (13) is arranged between the slider (12) and the driving block (11); one end of the driving rod (13) is hingedly connected to the upper surface of the slider (12); the other end of the driving rod (13) is hingedly connected to the side wall of the driving block (11); a mounting column (14) is arranged on the lower surface of one end of the two sliders (12) close to each other; a pressure roller (15) is rotatably arranged at the lower end of the mounting column (14).

10. A method for eliminating edge warping defects of glass fiber main and auxiliary beams of wind turbine blades according to claim 9, characterized in that: The connection mechanism comprises two connection plates (16), the two connection plates (16) are symmetrically arranged on the left and right sides of the mounting plate (9), a second electric push rod (17) is arranged on the lower surface of the connection plate (16), and the lower end of the second electric push rod (17) is connected to the upper surface of the support plate (6).

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