Wind power blade rear edge laying layer assembly, preparation method and wind power blade
The three-layer ply structure design solves the problems of low laying efficiency and numerous structural defects in the trailing edge ply assembly of wind turbine blades, achieving more efficient laying and stronger structural performance.
Patent Information
- Application Number
- CN202511332823.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2025-11-11
AI Technical Summary
Existing wind turbine blade trailing edge layup components have low laying efficiency and many structural defects, especially in blunt trailing edge designs where problems such as resin enrichment and wrinkles are prone to occur.
The structure employs a three-layer ply structure, including a first ply, a second ply, and a third ply. The first ply is laid on the rear edge of the shell. The second ply has an uneven interface with the first ply. The third ply is stacked at the interface between the first and second ply. The staggered overlapping enhances the connection strength and stress transfer uniformity, and reduces wrinkles and resin-rich defects.
It improved laying efficiency, enhanced the strength and stiffness of the trailing edge of wind turbine blades, reduced defects such as wrinkles and resin enrichment, and optimized stress transfer and load distribution.
Smart Images
Figure CN120921731A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind power generation technology, and in particular to a trailing edge layup assembly, preparation method and wind turbine blade. Background Technology
[0002] The trailing edge structure of wind turbine blades is a key component of wind turbine blades, and its design directly affects the aerodynamic performance and structural strength of the blades. With the development of wind power technology, the trend towards larger blades is significant. The design of blunt trailing edges, by increasing the thickness of the trailing edge, optimizes airflow separation characteristics, thereby improving wind energy conversion efficiency.
[0003] In related technologies, the trailing edge facade of wind turbine blades with blunt trailing edges mainly adopts the trailing edge prefabrication process. The trailing edge prefabrication process involves preforming the trailing edge prefabrication part in an independent mold, and then embedding it as a whole into the main mold and performing secondary injection molding with the blade shell.
[0004] However, the aforementioned trailing edge layup components and layup processes have low layup efficiency and numerous structural defects. Summary of the Invention
[0005] This application provides a trailing edge layup assembly, a manufacturing method, and a wind turbine blade to address the problems of low laying efficiency and numerous structural defects.
[0006] In a first aspect, embodiments of this application provide a trailing edge ply assembly for a wind turbine blade, comprising: a first ply, laid on the trailing edge vertical surface of the wind turbine blade shell; a second ply, laid on the outer wall of the shell and connected to the first ply near the leading edge of the shell, wherein the connecting surface between the second ply and the first ply is uneven; and a third ply, stacked on the side of the first and second ply facing away from the shell, and at least correspondingly disposed at the connection between the first and second ply.
[0007] In the aforementioned trailing edge ply assembly of the wind turbine blade, it is possible to have a recessed portion at the junction of the first and second plyes, with the recessed portion recessed towards the side closer to the shell, and a third ply laid within the recessed portion. The surface of the third ply facing away from the shell is smoothly connected to the surfaces of the first and second plyes facing away from the shell.
[0008] In the aforementioned trailing edge ply assembly of the wind turbine blade, it is possible to achieve that, along the direction from the trailing edge to the leading edge, the deepest point of the recess is located at the junction of the first ply and the second ply near the leading edge.
[0009] In the aforementioned trailing edge layup assembly of the wind turbine blade, it is possible to have a first inner sidewall and a second inner sidewall disposed opposite each other along the direction from the trailing edge to the leading edge. One end of the first inner sidewall connected to the recessed opening of the recess is inclined away from the recessed area relative to the end of the first inner sidewall connected to the recessed bottom of the recess. Similarly, one end of the second inner sidewall connected to the recessed opening of the recess is inclined away from the recessed area relative to the end of the second inner sidewall connected to the recessed bottom of the recess.
[0010] In the aforementioned trailing edge ply assembly of the wind turbine blade, the first ply comprises N first sub-pavements, which are stacked sequentially along the direction away from the shell; the second ply comprises M second sub-pavements, which are stacked sequentially along the direction away from the shell. The N first sub-pavements form a first stepped surface at the junction of the first and second plies, and the M second sub-pavements form a second stepped surface at the junction of the second and first plies. The first and second stepped surfaces are shaped to fit together and are closely connected.
[0011] In the aforementioned trailing edge ply assembly of the wind turbine blade, it is possible that, among the N first sub-lays, the stepped end of the first sub-lay near the shell side and the stepped end of the first sub-lay away from the shell side are located near the leading edge of the shell. Similarly, among the M second sub-lays, the stepped end of the second sub-lay near the shell side and the stepped end of the second sub-lay away from the shell side are located near the leading edge of the shell.
[0012] In the N first sub-layers, the step surface end of the first sub-layer on the side closer to the shell is formed with respect to the shell side, and the step surface end of the first sub-layer on the side away from the shell is formed with respect to the rear edge of the shell; in the M second sub-layers, the step surface end of the second sub-layer on the side closer to the shell is formed with respect to the shell side, and the step surface end of the second sub-layer on the side away from the shell is formed with respect to the rear edge of the shell.
[0013] In the aforementioned trailing edge ply assembly of the wind turbine blade, it is possible for the first ply to include a first layer segment and a second layer segment; the first layer segment is connected to the second layer segment near the trailing edge of the shell, and the first layer segment is laid on the trailing edge facade of the shell; the extension direction of the first layer segment intersects the extension direction of the second layer segment.
[0014] Secondly, embodiments of this application provide a method for preparing a trailing edge ply of a wind turbine blade, used to prepare the aforementioned trailing edge ply assembly, the method comprising:
[0015] The first ply is formed and laid on the rear edge facade of the shell.
[0016] A second ply is formed, which is laid on the outer wall of the shell and connected to the first ply near the front edge of the shell. The connection surface between the second ply and the first ply is uneven.
[0017] A third ply is formed, which is laid on the side of the first and second plies away from the shell, and is at least correspondingly disposed at the junction of the first and second plies.
[0018] In the above preparation method, the formation of the first layup can be achieved, specifically including:
[0019] In a pre-formed mold, N first sub-layers are sequentially laid to prepare the pre-formed first layer.
[0020] The first layup of a predetermined shape is placed in a vacuum environment and heated. After heating, it is cooled to obtain the first layup.
[0021] The first layup is lifted to the rear edge of the wind turbine blade shell using hoisting equipment, and then the hoisting equipment is removed to lay the first layup to the rear edge of the shell.
[0022] Thirdly, embodiments of this application provide a wind turbine blade, including: a shell and a trailing edge ply assembly, the shell having a trailing edge located on the suction surface (SS surface); the trailing edge ply assembly is laid on the outer wall surface of the trailing edge.
[0023] The wind turbine blade trailing edge ply assembly, manufacturing method, and wind turbine blade provided in this application embodiment include a first ply, a second ply, and a third ply. By laying the first ply on the trailing edge vertical surface of the wind turbine blade shell and connecting the second ply to the first ply near the leading edge of the shell, and by making the connection surface of the first and second ply uneven, stress transmission is more uniform, thereby reducing stress concentration. This not only avoids defects such as wrinkles and resin enrichment in the trailing edge vertical surface and trailing edge corner area, but also improves the laying efficiency. By layering the third ply on the side of the first and second ply away from the shell, and at least correspondingly disposed at the connection between the first and second ply, defects such as wrinkles caused by edge lifting are further reduced. Attached Figure Description
[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0025] Figure 1 A schematic diagram of an overlapping method for the trailing edge ply assembly of a wind turbine blade provided in an embodiment of this application;
[0026] Figure 2A schematic diagram of another overlapping method of the trailing edge ply assembly of the wind turbine blade provided in the embodiments of this application;
[0027] Figure 3 A flowchart illustrating the method for preparing the trailing edge layup of a wind turbine blade according to an embodiment of this application;
[0028] Figure 4 This is a schematic diagram of the structure of a wind turbine blade provided in an embodiment of this application.
[0029] Explanation of reference numerals in the attached figures:
[0030] 100, First ply; 110, First segment; 120, Second segment; 130, First sub-ply; 131, First stepped surface; 200, Second ply; 210, Second sub-ply; 211, Second stepped surface; 300, Third ply; 400, Recess; 410, First inner wall; 420, Second inner wall; 500, Shell; 510, Rear edge; 511, Rear edge elevation; 520, Front edge.
[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0033] In related technologies, the trailing edge facade of wind turbine blades with blunt trailing edges mainly adopts the trailing edge prefabrication process. The trailing edge prefabrication parts are large in size and easily deformed. After being hoisted into the blade mold, gaps are easily generated between the prefabrication parts and the mold, resulting in resin-rich defects.
[0034] In view of this, this application provides a trailing edge ply assembly for a wind turbine blade, a manufacturing method therefor, and a wind turbine blade, wherein the trailing edge ply assembly includes a first ply, a second ply, and a third ply. The first ply is laid on the trailing edge vertical surface of the wind turbine blade shell; the second ply is laid on the outer wall of the shell and connected to the first ply near the leading edge of the shell, and the connection surface between the second ply and the first ply is uneven; the third ply is stacked on the side of the first and second ply facing away from the shell and is at least correspondingly disposed at the connection between the first and second ply. By laying the first ply on the trailing edge of the wind turbine blade shell and connecting the second ply to the side of the first ply near the leading edge of the shell, and by making the connection surface of the first and second ply uneven, stress transmission is made more uniform, thereby reducing stress concentration. This not only avoids defects such as wrinkles and resin enrichment in the trailing edge and corner areas, but also improves laying efficiency. By layering the third ply on the side of the first and second ply away from the shell, and at least corresponding to the connection between the first and second ply, defects such as wrinkles caused by edge lifting are further reduced.
[0035] Firstly, referring to Figure 1 and Figure 4 As shown, this application provides a trailing edge ply assembly for a wind turbine blade, including a first ply 100, a second ply 200, and a third ply 300. The first ply 100 is laid on the trailing edge surface 511 of the wind turbine blade housing 500. The second ply 200 is laid on the outer wall of the housing 500 and connected to the first ply 100 near the leading edge 520 of the housing 500; the connection surface between the second ply 200 and the first ply 100 is uneven. The third ply 300 is stacked on the side of the first ply 100 and the second ply 200 away from the housing 500, and is at least correspondingly disposed at the connection point between the first ply 100 and the second ply 200, with the direction from the trailing edge 510 to the leading edge 520 being... Figure 1 and Figure 2 The x-direction in the middle.
[0036] In this embodiment, the first layup 100 is the trailing edge shaping fabric for the wind turbine blade, the second layup 200 is the trailing edge reinforcing fabric, and the third layup 300 is a prefabricated unidirectional fiber fabric. The trailing edge shaping fabric can be understood as transforming multiple layers of soft, shapeless dry glass fiber cloth or carbon fiber cloth into a prefabricated component capable of conforming to the complex three-dimensional curved surface shape of the trailing edge 510 through sewing or bonding shaping techniques. This method allows for natural conformation during placement, with the fabric in close contact with the mold surface without any gaps. Therefore, it avoids defects such as wrinkles and bridging caused by manually laying flat fiber cloth on the trailing edge 510 mold, thereby improving the conformability of the shaping fabric.
[0037] Trailing edge reinforcement fabric is one or more layers of localized reinforcement material added to the trailing edge 510 section of the wind turbine blade, typically biaxial or triaxial fabric, to provide shear strength. By increasing the local strength and stiffness of the wind turbine blade shell 500, the load-bearing capacity of the trailing edge 510 region of the wind turbine blade is improved, thereby withstanding greater local and assembly pressures. The aforementioned biaxial fabric can be understood as being composed of two layers of fiber fabric, one layer with fibers in the +45° direction and the other layer with fibers in the -45° direction. The two layers of fiber fabric are fixed by braiding or adhesive, which can effectively resist shear and torsional forces. The aforementioned fiber fabric can also be set in the 0° and 90° directions to provide localized strength. Triaxial fabric is composed of three layers of fiber fabric combined at 0°, -45°, and +45°, and finally fixed into a whole by braiding or adhesive. The fiber fabric at 0° provides axial strength and stiffness, while the fiber fabrics at -45° and +45° provide shear and torsional resistance, thus achieving balanced performance in multiple directions.
[0038] Prefabricated unidirectional fiber cloth is prepared in a prefabrication process as an independent component, pre-made outside of the main mold. Unidirectional fiber cloth, typically glass fiber or carbon fiber, is laid out according to a pre-designed layup scheme in a small, custom-designed mold. Then, it is vacuum-infused with resin to create a cured, high-precision trailing edge component, which is finally assembled onto the blade body. This method avoids defects caused by wrinkles and bridging, and also improves laying efficiency.
[0039] In this embodiment, the trailing edge shaping fabric and the trailing edge reinforcing fabric are interlocked through staggered layers, which greatly enhances the connection strength and peel resistance between each layer of fiber fabric. The uneven interface at the joint increases the effective bonding area, and the uneven joint surface forms a mechanical interlock, making the trailing edge shaping fabric and the trailing edge reinforcing fabric mesh together like gears, significantly improving the shear resistance of the interface and optimizing the load transfer efficiency. The prefabricated unidirectional fiber fabric is disposed on the side of the trailing edge reinforcing fabric away from the shell 500 and is connected to the trailing edge shaping fabric, improving the local strength and stiffness of the wind turbine blade.
[0040] In summary, the first ply 100 is partially laid on the trailing edge facade 511 and partially laid on the outer wall of the shell 500. The second ply 200 is laid on the outer wall of the shell 500 and is connected to the portion of the first ply 100 laid on the outer wall of the shell. The third ply 300 is laid on the side of the second ply 200 away from the shell 500. Together, the three ply constitute the trailing edge 510 of the wind turbine blade. This not only improves the strength and rigidity of the trailing edge 510 of the wind turbine blade and reduces defects such as wrinkles caused by edge warping, but also improves the laying efficiency.
[0041] In one feasible implementation, the connection between the first ply 100 and the second ply 200 has a recess 400, which is recessed toward the side closer to the housing 500, and the third ply 300 is laid in the recess 400. The third ply 300 is opposite to the surface of the housing 500 and is smoothly connected to the opposite surfaces of the first ply 100 and the second ply 200.
[0042] As one feasible implementation, along the direction from the trailing edge 510 to the leading edge 520, the deepest point of the recess 400 is located on the side near the leading edge 520 at the junction of the first ply 100 and the second ply 200.
[0043] For example, at the junction of the first ply 100 and the second ply 200, a recess 400 is formed on the side facing away from the housing 500 for laying the third ply 300. This increases the overall thickness of the corresponding area, filling the recess 400 formed by the first ply 100 and the third ply 300, providing continuous and flat support, thereby improving its strength and shear resistance. During resin infusion, the fibers can be impregnated, avoiding resin overload. The surfaces of the first ply 100 and the third ply 300 facing away from the housing 500 are smoothly connected. This smooth transition allows airflow to smoothly transition across the blade surface during operation, with no stress concentration on the surface, preventing crack formation.
[0044] In this embodiment, the deepest point of the recess 400 is located on the side of the first ply 100 and the second ply 200 near the leading edge 520. Figure 1 and Figure 2 Point A in the diagram. It is understood that the edge of the first ply 100 near its leading edge 520 must not extend beyond the highest point of the third ply 300. By restricting the edge position, the conformity of the first ply 100 and the third ply 300 is ensured, reducing defects such as wrinkles caused by edge warping. In other embodiments, in certain specific areas, such as high-stress areas, the first ply 100 may extend approximately beyond the highest point of the third ply 300. By locally adding reinforcing layers, additional reinforcement can be provided in high-stress areas, thereby improving structural strength and stiffness.
[0045] In one feasible implementation, along the direction from the trailing edge 510 to the leading edge 520, the recess 400 has a first inner sidewall 410 and a second inner sidewall 420 disposed opposite to each other. One end of the first inner sidewall 410 connected to the recess opening of the recess 400 is inclined in a direction away from the recess 400 relative to the end of the first inner sidewall 410 connected to the recess bottom of the recess 400.
[0046] As another possible implementation, the end of the second inner sidewall 420 that connects to the recessed opening of the recessed portion 400 is inclined in a direction away from the recessed portion 400 relative to the end of the second inner sidewall 420 that connects to the recessed bottom of the recessed portion 400.
[0047] For example, the inclined first inner sidewall 410 and second inner sidewall 420 provide a rigid transition at the interface, uniformly distributing the stress of the third ply 300 from the bottom up to the first ply 100 and the second ply 200 on both sides, further avoiding stress concentration at the formed angle. The inclined first inner sidewall 410 and second inner sidewall 420 make the recess 400 trapezoidal, which allows the third ply 300 to provide a larger contact area with the first ply 100 and the second ply 200, enabling the interface to withstand higher in-contact shear forces. In addition, the inclined sidewalls facilitate resin flow during resin infusion of the third ply 300, thereby reducing the formation of air bubbles at the interface.
[0048] In one feasible implementation, the first ply 100 includes N first sub-pavements 130, which are stacked sequentially in a direction away from the housing 500. The second ply 200 includes M second sub-pavements 210, which are stacked sequentially in a direction away from the housing 500.
[0049] N first sub-plyes 130 form a first step surface 131 at the junction of the first sub-ply 100 and the second sub-ply 200, and M second sub-plyes 210 form a second step surface 211 at the junction of the second sub-ply 200 and the first sub-ply 100. The first step surface 131 and the second step surface 211 are adapted in shape and fit together and are connected.
[0050] For example, the first ply 100 includes N first sub-pavements 130, which are stacked along the side away from the housing 500 and have different widths. The end faces of the first sub-pavements 130 near the rear edge 510 are flush with each other, and the end faces near the front edge 520 are stepped slopes. N can be 5-8, and in this embodiment, N is 6. In other embodiments, N can also be 5, 8, etc. The second ply 200 includes M second sub-pavements 210, which are stacked along the side away from the housing 500 and have different widths. The end faces of the second sub-pavements 210 near the front edge 520 are flush with each other, and the end faces near the rear edge 510 are stepped slopes. M can be 5-8, and in this embodiment, M is 6. In other embodiments, M can also be 5, 8, etc. The end faces of the N first sub-layers 130 near the leading edge 520 are adapted in shape to the end faces of the M and second sub-layers 210 near the trailing edge 510, and are closely connected. The number and specifications of the sub-layers are adjusted according to the stress level of the corresponding area of the blade. The number of first sub-layers 130 and the number of second sub-layers 210 can be equal or unequal. Through interlayer bonding or sewing processes, stress concentration caused by excessively thick single-layer fabric can be avoided.
[0051] As one feasible implementation method, refer to Figure 1 As shown, among the N first sub-layers 130, the step surface end of the first sub-layer 130 on the side near the shell 500 is located on the side away from the shell 500, near the leading edge 520 of the shell 500; among the M second sub-layers 210, the step surface end of the second sub-layer 210 on the side near the shell 500 is located on the side away from the shell 500, near the leading edge 520 of the shell 500.
[0052] Understandably, the staggered layering of the first ply 100 and the second ply 200 proceeds sequentially from the leading edge 520 to the trailing edge 510. Specifically, the area of the multiple first sub-pavements 130 gradually increases from the side closest to the shell 500 to the side away from the shell 500, while the area of the multiple second sub-pavements 210 gradually decreases from the side closest to the shell 500 to the side away from the shell 500. This allows the first ply 100 to be laid first, followed by the circumferential laying of the second ply 200, ensuring ply uniformity and thus improving laying efficiency.
[0053] In other embodiments, reference is made to Figure 2As shown, among the N first sub-layers 130, the step surface end of the first sub-layer 130 on the side near the shell 500 is located near the rear edge 510 of the shell 500. Among the M second sub-layers 210, the step surface end of the second sub-layer 210 on the side near the shell 500 is located near the rear edge 510 of the shell 500.
[0054] Understandably, the staggered layering of the first ply 100 and the second ply 200 is done sequentially from the rear edge 510 to the front edge 520. Specifically, the area of the multiple first sub-pavements 130 gradually decreases from the side closest to the shell 500 to the side away from the shell 500, while the area of the multiple second sub-pavements 210 gradually increases from the side closest to the shell 500 to the side away from the shell 500. This allows for priority coverage of the high-stress area of the rear edge 510, enhancing the bending resistance of the rear edge facade 511. However, with this staggered layering method, since the end face of the first ply 100 near the front edge 520 is located below the end face of the second ply 200 near the rear edge 510, it is necessary to lift the side of the first ply 100 near the front edge 520 before laying the second ply 200.
[0055] For example, in the two staggered layering methods described above, the staggered layer spacing can be 5cm, 7cm, or 10cm. In other embodiments, a gradient staggered layering spacing can also be adopted according to the load reduction law from the outside to the inside of the blade. Specifically, the staggered layering spacing can be set to a stepped distribution with denser outer layers, 7cm middle layers, and 10cm inner layers. In addition, an uneven connecting surface is formed at the end of the first ply 100 near the leading edge 520 and the end of the second ply 200 near the trailing edge 510. For example, the end of the first sub-ply 130 of the first layer near the shell 500 is closer to the rear edge 510 side of the end of the first sub-ply 130 of the second layer, the end of the first sub-ply 130 of the second layer is closer to the front edge 520 side of the end of the first sub-ply 130 of the third layer, and so on. The end of the second sub-ply 210 near the rear edge 510 and the corresponding end of the first sub-ply 130 are shaped to fit and are connected to each other.
[0056] In other embodiments, the staggered layering method can also be dynamically adjusted according to the change in the curvature of the wind turbine blade, switching from the leading edge 520 to the trailing edge 510 or from the trailing edge 510 to the leading edge 520. This can adapt to different curvature regions and reduce defects such as local wrinkles or gaps caused by curvature mismatch.
[0057] In one feasible implementation, the first layup 100 includes a first layer segment 110 and a second layer segment 120, wherein the first layer segment 110 is connected to the second layer segment 120 on the side near the rear edge 510 of the housing 500, and the first layer segment 110 is laid on the rear edge facade 511 of the housing 500; the extension direction of the first layer segment 110 intersects the extension direction of the second layer segment 120.
[0058] For example, by setting the first layer 110 on the trailing edge facade 511 to form a blunt trailing edge shape, the thickness of the trailing edge 510 of the wind turbine blade is increased, making it stronger and providing more internal space. This facilitates the installation of components such as the main beam cap of the trailing edge 510, further improving the strength of the trailing edge 510. The first ply 100 connects the two planes of the trailing edge 510 of the wind turbine blade in two different directions into a whole. The first layer 110 and the second layer 120 of the first ply 100 are smoothly connected at their intersection, rather than at a right angle. This makes the load transfer from the second layer 120 to the first layer 110 more efficient and avoids the generation of huge shear forces and load concentrations at the angle of the first ply 100. In addition, it also improves the manufacturability of the trailing edge 510.
[0059] Secondly, embodiments of this application provide a method for preparing the trailing edge ply of a wind turbine blade, used to prepare the aforementioned trailing edge ply assembly, referring to... Figure 3 As shown, its preparation method includes:
[0060] S100: Form the first ply, which is laid on the rear edge facade of the shell.
[0061] S200: Forming a second ply, which is laid on the outer wall of the shell and connected to the first ply near the front edge of the shell. The connection surface between the second ply and the first ply is uneven.
[0062] S300: Forming a third ply, the third ply is laid on the side of the first and second ply away from the shell, and is at least correspondingly disposed at the junction of the first and second ply.
[0063] The method for preparing the trailing edge ply in this application embodiment adopts the technical solutions of the first ply 100, the second ply 200 and the third ply 300 in the above-mentioned trailing edge ply assembly embodiment. Therefore, it has at least the beneficial effects brought by the technical solutions of the above-mentioned trailing edge ply assembly embodiment, which will not be described in detail here.
[0064] For example, the laying order of the first ply 100, the second ply 200, and the third ply 300 needs to be adjusted according to actual needs. In this embodiment, the laying order is as follows: the first ply 100, the second ply 200, and the third ply 300 are laid sequentially. In other embodiments, the third ply 300, the first ply 100, and the second ply 200 may also be laid in that order, and this is not limited here.
[0065] As one feasible implementation method, forming the first ply 100 specifically includes:
[0066] In a pre-formed mold, N first sub-layers 130 are sequentially laid to prepare a pre-formed first layer 100.
[0067] The predetermined first layup 100 is placed in a vacuum environment and heated. After heating, it is cooled to obtain the first layup 100.
[0068] The first layer 100 is hoisted to the rear edge 510 side of the shell 500 of the wind turbine blade using hoisting equipment, and then the hoisting equipment is removed so that the first layer 100 can be laid on the rear edge facade 511 of the shell 500.
[0069] For example, before laying the first ply 100, it needs to be pre-shaped. In this embodiment, the first sub-ply 130 is a trailing edge shaping fabric. This shaping fabric is a dry material, such as dry glass fiber or carbon fiber fabric. The shaping fabric is pre-shaped on a pre-shaped mold, where the mold corresponds to the area of the trailing edge 510 of the wind turbine blade. On the pre-shaped mold, the shaping fabric is laid according to the corresponding size, specifications, and number of layers. The shaping fabric is laid axially as a whole; in other embodiments, it can also be laid circumferentially. Here, axial refers to the direction along the wind turbine blade from the blade root to the blade tip, and circumferential refers to the direction around the circumference of the wind turbine blade. The above laying process completes the laying of dry material. At this time, the shaping fabric in the mold is a pile of dry material without a fixed shape, and therefore cannot bear weight.
[0070] The pre-formed first layup 100 is placed in a vacuum environment. After confirming that the pre-formed first layup 100 is well sealed, the mold is heated according to a preset temperature and time. The specific temperature can be 70℃-90℃, and the heating time is 10-180 minutes. After shaping, it is cooled to form the first layup 100. Exemplarily, natural cooling is used. In other embodiments, an active and controllable cooling method can also be used. Specifically, cooling water channels can be set in the pre-formed mold to remove heat through cooling water circulation. In addition, a combination of active and passive cooling methods can be used. The specific cooling process is not described here.
[0071] After the first layup 100 is shaped, it needs to be lifted, positioned, and laid as a whole. Specifically, a hoisting device is used to lift the first layup 100 as a whole, raise it above the corresponding area of the main mold of the wind turbine blade, and then slowly lower it. After the hoisting device is in place, it is removed, at which point the first layup 100 is laid entirely on the main mold of the wind turbine blade. In the embodiments of this application, a limiting structure is pre-set on the main mold of the wind turbine blade to facilitate the positioning of the hoisting device during hoisting. This ensures accurate and repeatable positioning and improves laying efficiency.
[0072] Thirdly, referring to Figure 4 As shown in the figure, this application embodiment provides a wind turbine blade, including: a housing 500 and a trailing edge ply assembly. The housing 500 has a trailing edge 510 located on the suction surface (SS surface); the trailing edge ply assembly is laid on the outer wall surface of the trailing edge 510.
[0073] It is understood that since the wind turbine blades of this application adopt the technical solution of the above-described trailing edge ply assembly embodiment, they at least have the beneficial effects brought about by the technical solution of the above-described trailing edge ply assembly embodiment, which will not be described in detail here.
[0074] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0075] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.
Claims
1. A trailing edge layup assembly for a wind turbine blade, characterized in that, include: The first layer (100) is laid on the rear edge facade (511) of the shell (500) of the wind turbine blade. The second ply (200) is laid on the outer wall of the shell (500) and connected to the first ply (100) on the side near the front edge (520) of the shell (500). The connection surface between the second ply (200) and the first ply (100) is uneven. The third ply (300) is laid on the side of the first ply (100) and the second ply (200) away from the housing (500), and is at least correspondingly disposed at the connection between the first ply (100) and the second ply (200).
2. The trailing edge layup assembly of the wind turbine blade according to claim 1, characterized in that, The first ply (100) and the second ply (200) have a recess (400) at the connection point, the recess (400) being recessed toward the side closer to the shell (500), and the third ply (300) is laid in the recess (400); The third layup (300) is opposite to the surface of the housing (500) and is smoothly connected to the surfaces of the first layup (100) and the second layup (200) opposite to the surface of the housing (500).
3. The trailing edge layup assembly of the wind turbine blade according to claim 2, characterized in that, Along the direction from the trailing edge (510) to the leading edge (520), the deepest point of the recess (400) is located on the side near the leading edge (520) at the junction of the first ply (100) and the second ply (200).
4. The trailing edge layup assembly of the wind turbine blade according to claim 3, characterized in that, Along the direction from the rear edge (510) to the front edge (520), the recess (400) has a first inner sidewall (410) and a second inner sidewall (420) disposed opposite to each other. The end of the first inner sidewall (410) that connects to the recessed opening of the recessed portion (400) is inclined in a direction away from the recessed portion (400) relative to the end of the first inner sidewall (410) that connects to the recessed bottom of the recessed portion (400). And / or, one end of the second inner sidewall (420) connected to the recessed opening of the recessed portion (400) is inclined in a direction away from the recessed portion (400) relative to the end of the second inner sidewall (420) connected to the recessed bottom of the recessed portion (400).
5. The trailing edge layup assembly of a wind turbine blade according to any one of claims 1-4, characterized in that, The first ply (100) includes N first sub-pavements (130), which are stacked sequentially in a direction away from the shell (500); The second ply (200) includes M second sub-palves (210), which are stacked sequentially in a direction away from the shell (500); N first sub-plyes (130) form a first step surface (131) at the junction of the first ply (100) and the second ply (200), and M second sub-plyes (210) form a second step surface (211) at the junction of the second ply (200) and the first ply (100). The first step surface (131) and the second step surface (211) are shaped to fit together and are connected to each other.
6. The trailing edge layup assembly of the wind turbine blade according to claim 5, characterized in that, Of the N first sub-lays (130), the step end of the first sub-lay (130) formed on the side of the first sub-lay (130) facing away from the shell (500) is located on the side of the first sub-lay (130) facing away from the shell (500) and is located on the side of the leading edge (520) of the shell (500). Of the M second sub-lays (210), the step end of the second sub-lay (210) formed on the side of the second sub-lay (210) facing away from the shell (500) is located on the side of the second sub-lay (210) facing away from the shell (500), near the leading edge (520) of the shell (500). Alternatively, among the N first sub-lays (130), the step end formed by the first sub-lay (130) on the side close to the shell (500) is located on the side away from the shell (500) and the step end formed by the first sub-lay (130) is located on the side close to the trailing edge (510) of the shell (500). Of the M second sub-lays (210), the step end of the second sub-lay (210) formed relative to the side of the housing (500) formed by the second sub-lay (210) facing away from the housing (500) is located on the side of the housing (500) facing away from the housing (500).
7. The trailing edge layup assembly of a wind turbine blade according to any one of claims 1-4, characterized in that, The first ply (100) includes a first layer segment (110) and a second layer segment (120); The first layer (110) is connected to the second layer (120) on the side of the rear edge (510) of the housing (500), and the first layer (110) is laid on the rear edge facade (511) of the housing (500). The extension direction of the first layer segment (110) intersects with the extension direction of the second layer segment (120).
8. A method for preparing the trailing edge layup of a wind turbine blade, characterized in that, The method for preparing the trailing edge layup assembly according to any one of claims 1-7 comprises: A first ply (100) is formed, which is laid on the rear edge facade (511) of the shell (500). A second ply (200) is formed, which is laid on the outer wall of the shell (500) and connected to the first ply (100) on the side near the front edge (520) of the shell (500). The connection surface between the second ply (200) and the first ply (100) is uneven. A third ply (300) is formed, which is laid on the side of the first ply (100) and the second ply (200) away from the housing (500), and is at least correspondingly disposed at the connection between the first ply (100) and the second ply (200).
9. The preparation method according to claim 8, characterized in that, Forming the first ply (100) specifically includes: In a pre-formed mold, N first sub-layers (130) are laid in sequence to prepare a pre-formed first layer (100). The first layup (100) of the predetermined type is placed in a vacuum environment and heated. After heating, it is cooled to obtain the first layup (100). The first layup (100) is lifted to the rear edge (510) of the shell (500) of the wind turbine blade using a hoisting device, and the hoisting device is removed so that the first layup (100) can be laid on the rear edge facade (511) of the shell (500).
10. A wind turbine blade, characterized in that, include: The housing (500) has a trailing edge (510) located on the suction surface. The trailing edge layup assembly is laid on the outer wall surface of the trailing edge (510).