Pultruded panels, pultruded spars and wind turbine blades

Abstract

The present disclosure relates to a kind of pultrusion plate, pultrusion girder and wind power blade, the pultrusion girder includes several pultrusion splice layers, several the pultrusion splice layers are arranged in stack along first direction, each the pultrusion splice layer includes several pultrusion units, and the pultrusion unit of each the pultrusion splice layer is arranged along second direction, the first direction and the second direction intersect, wherein, the pultrusion unit has first fault-tolerant slot, second fault-tolerant slot and the communicating hole of the first fault-tolerant slot and second fault-tolerant slot, the first fault-tolerant slot and the second fault-tolerant slot are located in the opposite two sides of the pultrusion unit along the first direction respectively, and the first fault-tolerant slot and the second fault-tolerant slot are adjacent to the side of the pultrusion unit along the second direction.The technical scheme provided by the present disclosure can reduce the possibility of interlayer defect of pultrusion girder, improve the overall performance of wind power blade.

Description

Technical Field

[0001] This disclosure relates to the technical field of wind power equipment, and particularly to a pultruded plate, a pultruded main beam, and a wind turbine blade. Background Technology

[0002] Pultruded main beams are usually assembled and bonded from multiple pultruded plates. When stacking pultruded plates, due to dimensional errors and / or stacking errors, adjacent pultruded plates may overlap and misalign.

[0003] This offset causes the adjacent vertical interfaces of the pultruded main beam to overlap and misalign, resulting in blockage of the splice joint, reduced grouting efficiency, and poor interlayer grouting and wetting, thus affecting the overall performance of the blade. Utility Model Content

[0004] The purpose of this disclosure is to provide a pultruded plate, a pultruded main beam, and a wind turbine blade, which can reduce the possibility of interlayer defects in the pultruded main beam and improve the overall performance of the wind turbine blade.

[0005] According to one aspect of this disclosure, a pultruded main beam is provided, the pultruded main beam comprising a plurality of pultruded splice layers stacked along a first direction, each pultruded splice layer comprising a plurality of pultruded units, and the plurality of pultruded units of each pultruded splice layer arranged along a second direction, the first direction and the second direction intersecting, wherein the pultruded unit has a first tolerance groove, a second tolerance groove, and a connecting hole connecting the first tolerance groove and the second tolerance groove, the first tolerance groove and the second tolerance groove being located on opposite sides of the pultruded unit along the first direction, and the first tolerance groove and the second tolerance groove being adjacent to one side of the pultruded unit along the second direction.

[0006] The technical solution provided in this disclosure provides a first tolerance groove, a second tolerance groove, and a connecting hole connecting the first tolerance groove and the second tolerance groove on the pultrusion unit. The arrangement of the first tolerance groove and the second tolerance groove can increase the interface space between two adjacent pultrusion units in the first direction, thereby widening the flow channel of the adhesive liquid (e.g., resin), accelerating the injection speed, and improving production efficiency.

[0007] Meanwhile, the first and second tolerance slots are equivalent to tolerance areas for two adjacent connecting holes in the first direction. In other words, when two adjacent pultruded splice layers are misaligned to a certain extent during the stacking process, the two adjacent connecting holes can still be connected through the first and second tolerance slots, so that the adhesive can flow smoothly in the vertical direction, avoid the flow gap from being closed due to mutual stacking misalignment, reduce the possibility of interlayer defects in the pultruded main beam, and improve the overall performance of the wind turbine blade.

[0008] Optionally, each pultrusion unit has multiple connecting holes, which are spaced apart along a third direction perpendicular to the first and second directions.

[0009] The above scheme, with the spacing of multiple connecting holes, can meet the needs of vertical flow, reduce damage to the mechanical properties of the pultrusion unit, and maintain the mechanical properties of the wind turbine blades made by the pultrusion unit.

[0010] Optionally, the inner wall surface of the first fault-tolerant groove and / or the second fault-tolerant groove is a smooth curved surface.

[0011] The above scheme can make the stress evenly distributed along the curved surface, avoid stress concentration, reduce the impact of the first and second fault-tolerant grooves on the mechanical properties of the pultrusion unit, and thus ensure the mechanical properties of the wind turbine blade.

[0012] Optionally, the length of the connecting hole along the second direction is 0.5mm-2mm.

[0013] By using the above scheme, the length of the connecting hole along the second direction can be set so that the adhesive can spread vertically through the connecting hole, and the influence of the connecting hole on the mechanical properties of the pultrusion unit can be reduced, thereby ensuring the mechanical properties of the wind turbine blade.

[0014] Optionally, the projections of the first fault-tolerant slot and the second fault-tolerant slot along the first direction may coincide or partially coincide.

[0015] With the above scheme, when stacking pultruded main beams, they can be stacked in a way that aligns the two adjacent pultruded splice layers vertically. This allows the two adjacent connecting holes to be connected by the first and second tolerance slots between them, which facilitates the stacking operation.

[0016] Optionally, the connecting hole is located at the lowest point of the first fault-tolerant slot and the second fault-tolerant slot, and the connecting hole extends along the first direction.

[0017] The above solution utilizes the first and second tolerance grooves to concentrate the adhesive liquid at the connecting hole, reducing the flow resistance of the adhesive liquid and improving the injection efficiency. Simultaneously, the connecting hole extends along the first direction, i.e., vertically, which reduces its length and the flow time of the adhesive liquid within it, further improving injection efficiency and facilitating the processing and production of the connecting hole.

[0018] Optionally, the pultrusion unit is a pultrusion plate.

[0019] With the above scheme, the pultrusion unit is composed of a single plate, which reduces the number of pultruded plates that need to be stacked, facilitates the production operation of the pultruded main beam, and improves production efficiency.

[0020] Optionally, the pultrusion unit includes a first pultrusion plate and a second pultrusion plate; the length of the first pultrusion plate along the second direction is greater than the length of the second pultrusion plate along the second direction, the second pultrusion plate is located on one side of the first pultrusion plate along the second direction, and the first fault-tolerant groove, the second fault-tolerant groove and the connecting hole are located on the second pultrusion plate.

[0021] The above solution integrates the first fault-tolerant groove, the second fault-tolerant groove, and the connecting hole into a relatively small pultruded plate. This facilitates production and processing while avoiding any impact on the mechanical properties of the larger pultruded plate, thus ensuring the mechanical properties of the wind turbine blade.

[0022] Optionally, an interlayer fabric may be laid between two adjacent pultruded spliced ​​layers.

[0023] The above-mentioned scheme can increase the flow rate of the adhesive by utilizing the interlayer fabric, thereby improving the injection efficiency. It also increases the contact area between the interlayer fabric and the pultrusion unit and subsequent injected adhesive materials, resulting in a tighter interfacial bond. This is beneficial for improving the mechanical performance transfer efficiency of the entire wind turbine blade structure, enabling the various materials to work together more effectively.

[0024] According to another aspect of this disclosure, a wind turbine blade is provided, the wind turbine blade comprising the pultruded main beam described above.

[0025] According to another aspect of this disclosure, a pultruded plate is provided for use in wind turbine blades. The pultruded plate has a first tolerance groove, a second tolerance groove, and connecting holes. The first tolerance groove and the second tolerance groove are located on opposite sides of the pultruded plate along a first direction, and the first tolerance groove and the second tolerance groove are adjacent to one side of the pultruded plate along a second direction. The connecting holes are multiple in number and spaced apart along a third direction, and the connecting holes connect the first tolerance groove and the second tolerance groove. The first direction, the second direction, and the third direction are perpendicular to each other. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1A top view schematic diagram of a pultruded main beam according to an embodiment of the present disclosure is shown; Figure 2 A front view schematic diagram of a pultruded main beam according to an embodiment of the present disclosure is shown; Figure 3 A front view schematic diagram of another case of a pultruded main beam according to an embodiment of the present disclosure is shown; Figure 4 A top view schematic diagram of a pultrusion unit according to an embodiment of the present disclosure is shown; Figure 5 A top view schematic diagram of a pultruded main beam according to another embodiment of the present disclosure is shown; Figure 6 A front view schematic diagram of a pultruded main beam according to another embodiment of the present disclosure is shown; Figure 7 An exploded view of a pultrusion unit according to another embodiment of the present disclosure is shown.

[0028] Explanation of reference numerals in the attached figures: 1000, Pultruded main beam; 100. Pultruded spliced ​​layer; 110. Pultrusion unit; 111. First fault-tolerant groove; 112. Second fault-tolerant groove; 113. Connecting hole; 114. First pultrusion plate; 115. Second pultrusion plate. Detailed Implementation

[0029] Pultruded main beams are typically assembled and bonded from multiple pultruded plates. During the stacking of pultruded plates, due to dimensional and / or stacking errors, adjacent pultruded plates may overlap and misalign. This overlap and misalignment causes spatial misalignment between adjacent vertical interfaces of the pultruded main beam, leading to joint blockage, reduced grouting efficiency, and poor interlayer wetting, ultimately affecting the overall performance of the blade.

[0030] To address this, the present invention provides grooves on both the upper and lower surfaces of each pultruded plate, with the grooves adjacent to one side of the pultruded plate. A connecting hole penetrating both surfaces is provided within the groove, creating a tolerance zone. This allows the connecting holes on the two adjacent pultruded plates to remain stably connected even when they shift laterally, ensuring smooth resin flow and preventing the resin from stacking and closing flow gaps, thus affecting vertical resin flow. In this way, the resin can flow stably not only laterally but also vertically, improving injection efficiency, ensuring effective resin penetration, guaranteeing injection quality, avoiding delamination defects, and enhancing injection efficiency.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this disclosure, but not all embodiments.

[0032] like Figures 1 to 7 As shown, this disclosure provides a pultruded main beam 1000, which serves as the main load-bearing structure for wind turbine blades, providing bending and torsional resistance. Specifically, the pultruded main beam 1000 includes a plurality of pultruded splice layers 100, which are stacked along a first direction. Each pultruded splice layer 100 includes a plurality of pultruded units 110, and the plurality of pultruded units 110 of each pultruded splice layer 100 are arranged along a second direction, where the first and second directions intersect. For example, as... Figure 3 As shown, several pultruded splice layers 100 can be arranged vertically aligned, or, as... Figure 2 As shown, the pultruded splice layers 100 may be arranged with a certain degree of misalignment. When the pultruded splice layers 100 are aligned vertically, the pultruded units 110 can be regarded as arranged in a manner of several layers and several columns. The material of the pultruded units 110 may include glass fiber, carbon fiber, and carbon-glass hybrids, etc.

[0033] The pultrusion unit 110 has a first tolerance groove 111, a second tolerance groove 112, and a connecting hole 113 connecting the first tolerance groove 111 and the second tolerance groove 112. The first tolerance groove 111 and the second tolerance groove 112 are respectively located on opposite sides of the pultrusion unit 110 along a first direction, and the first tolerance groove 111 and the second tolerance groove 112 are adjacent to one side of the pultrusion unit 110 along a second direction. Alternatively, viewed from the cross-section of the pultrusion unit 110, the cross-section of the pultrusion unit 110 is approximately rectangular, having two sides located in the second direction, and an upper and lower part located in the first direction. The first tolerance groove 111 and the second tolerance groove 112 are respectively located on the upper and lower parts, and the first tolerance groove 111 and the second tolerance groove 112 are disposed adjacent to one side of the pultrusion unit 110. In this way, the arrangement of the first tolerance groove 111 and the second tolerance groove 112 can increase the interface space between two adjacent pultrusion units 110 in the first direction, thereby widening the flow channel of the adhesive liquid (e.g., resin), accelerating the injection speed, and improving production efficiency.

[0034] Meanwhile, the first fault-tolerant slot 111 and the second fault-tolerant slot 112 are equivalent to fault-tolerant regions for two adjacent connecting holes 113 in the first direction, that is, as Figure 2 and Figure 6As shown, when two adjacent pultruded splice layers 100 are misaligned to a certain extent during the stacking process, the two adjacent connecting holes 113 can still be connected through the first tolerance groove 111 and the second tolerance groove 112, so that the adhesive can flow smoothly in the vertical direction, avoid the flow gap from being closed due to the misalignment of the stacking, reduce the possibility of interlayer defects in the pultruded main beam 1000, and improve the overall performance of the wind turbine blade.

[0035] For example, with Figure 2 Taking the shown perspective as an example, when injecting adhesive into the pultruded main beam 1000, the adhesive can be injected from the upper left of the pultruded main beam 1000, and a flow guiding medium can be laid at the bottom of the pultruded main beam 1000. During the entire injection process, the adhesive permeates from left to right. Simultaneously, the adhesive at the bottom, guided by the flow guiding medium, flows faster than the adhesive between other layers. Furthermore, the two connecting holes 113 can be connected through their respective first and second tolerance grooves 111 and 112, forming a continuous vertical interface space. This allows the adhesive at the bottom to permeate upwards at each vertical interface space, achieving multi-channel flow and permeation of the adhesive from left to right and from bottom to top. Alternatively, flow guiding medium can be laid at both the top and bottom of the pultruded main beam 1000, allowing the adhesive to flow and permeate in multiple channels from left to right, from top to bottom, and from bottom to top.

[0036] In some embodiments, each pultrusion unit 110 has multiple connecting holes 113, which are spaced apart along a third direction, perpendicular to the first and second directions. This spaced arrangement of the multiple connecting holes 113 satisfies the need for vertical flow while minimizing damage to the mechanical properties of the pultrusion unit 110, thus maintaining the mechanical properties of the wind turbine blades made from the pultrusion unit 110.

[0037] For example, multiple connecting holes 113 on the same pultrusion unit 110 can be arranged at equal intervals or at non-equal intervals. The shape of the connecting holes 113 can be rectangular, elliptical, etc. It should be noted that the first direction can be the thickness direction of the pultrusion unit 110, the corresponding second direction is the width direction of the pultrusion unit 110, and the third direction is the length direction of the pultrusion unit 110.

[0038] In some embodiments, the inner wall surfaces of the first fault-tolerant groove 111 and the second fault-tolerant groove 112 can be non-smooth curved surfaces, or in other words, the inner wall surfaces of the first fault-tolerant groove 111 and the second fault-tolerant groove 112 have an included angle. For example, the first fault-tolerant groove 111 and the second fault-tolerant groove 112 can be rectangular grooves, trapezoidal grooves, or triangular grooves, etc.

[0039] In this embodiment, after the first fault-tolerant groove 111 and the second fault-tolerant groove 112 are formed, a reinforcing layer can be provided on the inner wall surface of the first fault-tolerant groove 111 and the second fault-tolerant groove 112 by means of coating, hot melting or other methods, to make up for the defects of reduced mechanical performance caused by the setting of the first fault-tolerant groove 111 and the second fault-tolerant groove 112, and maintain the mechanical performance of the wind turbine blade.

[0040] In some other embodiments, such as Figure 2 and Figure 3 As shown, the inner walls of the first tolerance groove 111 and the second tolerance groove 112 are smooth curved surfaces, or in other words, there are no angled regions between the inner walls of the first tolerance groove 111 and the second tolerance groove 112. This allows stress to be evenly distributed along the curved surface, avoiding stress concentration and reducing the impact of the first tolerance groove 111 and the second tolerance groove 112 on the mechanical properties of the pultrusion unit 110, thereby ensuring the mechanical properties of the wind turbine blade.

[0041] Meanwhile, when the adhesive flows in the first tolerance groove 111 and the second tolerance groove 112, the smooth curved surface can reduce the flow resistance of the adhesive, improve the injection efficiency, and also suppress the generation and retention of air bubbles, thus ensuring the injection quality.

[0042] For example, the inner wall surfaces of the first tolerance groove 111 and the second tolerance groove 112 are arc-shaped, and the groove depths of the first tolerance groove 111 and the second tolerance groove 112 decrease from their respective ends along a third direction towards the middle. In this case, the first tolerance groove 111 and the second tolerance groove 112 do not penetrate the opposite ends of the pultrusion unit 110 along a third direction. Thus, they can be formed by rotary grinding using circular or elliptical molds, simplifying the mold structure and manufacturing operations, and reducing production costs. As another example, the inner wall surfaces of the first tolerance groove 111 and the second tolerance groove 112 can also be irregular spline curves forming curved surfaces.

[0043] Of course, for the convenience of processing and production, the first fault tolerance groove 111 and the second fault tolerance groove 112 can penetrate through the opposite ends of the pultrusion unit 110 along the third direction, and the first fault tolerance groove 111 and the second fault tolerance groove 112 can be formed together with the pultrusion molding of the pultrusion unit 110.

[0044] In some embodiments, the length of the connecting hole 113 along the second direction is 0.5mm-2mm. In this way, by setting the length of the connecting hole 113 along the second direction, the adhesive can be fully spread vertically through the connecting hole 113, and the influence of the connecting hole 113 on the mechanical properties of the pultrusion unit 110 can be reduced, thereby ensuring the mechanical properties of the wind turbine blade.

[0045] The projections of the first tolerance groove 111 and the second tolerance groove 112 along the first direction can overlap or partially overlap. Thus, when stacking the pultruded main beam 1000, it can be stacked in such a way that the two adjacent pultruded splice layers 100 are aligned vertically, so that the two adjacent connecting holes 113 can be connected by the first tolerance groove 111 and the second tolerance groove 112 between them, which facilitates the stacking operation.

[0046] In some embodiments, the projection of the connecting hole 113 along the first direction onto the first fault-tolerant groove 111 is located within the first fault-tolerant groove 111, and the projection of the connecting hole 113 along the first direction onto the second fault-tolerant groove 112 is located within the second fault-tolerant groove 112, so as to ensure that two adjacent connecting holes 113 can be connected by utilizing the first fault-tolerant groove 111 and the second fault-tolerant groove 112 between them.

[0047] Furthermore, the connecting hole 113 is located at the lowest point of the first tolerance groove 111 and the second tolerance groove 112, and the connecting hole 113 extends along the first direction. In this way, the adhesive can be gathered at the connecting hole 113 using the first tolerance groove 111 and the second tolerance groove 112, reducing the flow resistance of the adhesive and improving the injection efficiency. Simultaneously, the fact that the connecting hole 113 extends along the first direction, i.e., vertically, reduces its length, shortens the flow time of the adhesive within the connecting hole 113, further improving injection efficiency, and also facilitates the processing and production of the connecting hole 113.

[0048] Regarding the specific structure of the pultrusion unit 110, this disclosure provides two feasible embodiments for reference.

[0049] Example 1, such as Figures 1 to 4 The pultrusion unit 110 is a pultruded plate. That is to say, the pultrusion unit 110 is composed of a single plate, which reduces the number of pultruded plates that need to be stacked, facilitates the production operation of the pultruded main beam 1000, and improves production efficiency.

[0050] Example 2, as follows Figures 5 to 7 The pultrusion unit 110 is composed of two pultrusion plates joined together. Specifically, the pultrusion unit 110 includes a first pultrusion plate 114 and a second pultrusion plate 115. That is, the length of the first pultrusion plate 114 along the second direction is greater than the length of the second pultrusion plate 115 along the second direction. The second pultrusion plate 115 is located on one side of the first pultrusion plate 114 along the second direction. The first tolerance groove 111, the second tolerance groove 112, and the connecting hole 113 are located on the second pultrusion plate 115. In this way, the first tolerance groove 111, the second tolerance groove 112, and the connecting hole 113 can be integrated on a relatively small pultrusion plate. On the one hand, this facilitates production and processing operations; on the other hand, it avoids affecting the mechanical properties of the larger pultrusion plate, thus ensuring the mechanical properties of the wind turbine blade.

[0051] For example, the pultruded splice layer 100 can be formed by splicing multiple pultruded units 110 along the second direction. Of course, the pultruded splice layer 100 can also be formed by multiple pultruded units 110 and an additional first pultruded plate 114. That is, the number of first pultruded plates 114 in the pultruded splice layer 100 is one more than the number of second pultruded plates 115, and the additional first pultruded plate 114 can be located as the first or the last one in the second direction.

[0052] In some embodiments, the pultruded main beam 1000 may further include an interlayer fabric, which is laid between two adjacent pultruded splice layers 100. This interlayer fabric can increase the flow rate of the adhesive and improve the injection efficiency. The interlayer fabric can be made of fiberglass cloth, whose rough surface allows for a larger contact area between the interlayer fabric and the pultruded unit 110 and the subsequently injected adhesive and other materials, resulting in a tighter interfacial bond. This improves the mechanical performance transfer efficiency of the entire wind turbine blade structure and enables better collaboration among the various materials.

[0053] For example, the interlayer fabric between two adjacent pultruded splice layers 100 in the first direction may have one or more layers.

[0054] According to another aspect of this disclosure, a wind turbine blade is also provided, which includes the aforementioned pultruded main beam 1000.

[0055] In the process of combining the pultruded main beam 1000 with the wind turbine blade shell, the pultruded main beam 1000 can adopt a non-prefabricated structure. Specifically, several pultruded units 110 and several interlayer fabrics are first assembled into a whole, and then the whole is placed into the shell layup and cast and cured together with the blade shell. Of course, the pultruded main beam 1000 can also adopt a prefabricated structure. Several pultruded units 110 and several interlayer fabrics are first assembled into a whole, and then the whole is placed into a prefabricated mold and cast and cured to form a prefabricated part. Finally, the prefabricated part is demolded, trimmed, and placed into the shell layup and cast and cured together with the blade shell.

[0056] It should be noted that the specific structure of the pultruded main beam 1000 can be found in the detailed description in the above embodiments, and will not be repeated here.

[0057] According to another aspect of this disclosure, a pultruded plate is also provided for use in wind turbine blades. The pultruded plate has a first tolerance groove 111, a second tolerance groove 112, and connecting holes 113. The first tolerance groove 111 and the second tolerance groove 112 are located on opposite sides of the pultruded plate along a first direction, and the first tolerance groove 111 and the second tolerance groove 112 are adjacent to one side of the pultruded plate along a second direction. A plurality of connecting holes 113 are provided, spaced apart along a third direction, and the connecting holes 113 connect the first tolerance groove 111 and the second tolerance groove 112. The first direction, the second direction, and the third direction are perpendicular to each other.

[0058] It should be noted that the specific structure of the pultruded plate can be found in the detailed description of the pultrusion unit 110 in the above embodiments, and will not be repeated here.

[0059] The terms "upper" and "lower" used in this disclosure are used to describe the relative positional relationship of the various structures in the accompanying drawings. They are only for the purpose of clarity of description and are not intended to limit the scope of implementation of this disclosure. Changes or adjustments to the relative relationships without substantially altering the technical content should also be considered as part of the scope of implementation of this disclosure.

[0060] It should be noted that, in this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] Furthermore, in this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A pultruded main beam, characterized in that, The pultruded main beam (1000) includes a plurality of pultruded splice layers (100), which are stacked along a first direction. Each pultruded splice layer (100) includes a plurality of pultruded units (110), and the plurality of pultruded units (110) of each pultruded splice layer (100) are arranged along a second direction. The first direction and the second direction intersect. The pultrusion unit (110) has a first tolerance groove (111), a second tolerance groove (112), and a connecting hole (113) connecting the first tolerance groove (111) and the second tolerance groove (112). The first tolerance groove (111) and the second tolerance groove (112) are located on opposite sides of the pultrusion unit (110) along the first direction, and the first tolerance groove (111) and the second tolerance groove (112) are adjacent to one side of the pultrusion unit (110) along the second direction.

2. The pultruded main beam according to claim 1, characterized in that, Each pultrusion unit (110) has multiple connecting holes (113), which are spaced apart along a third direction that is perpendicular to the first direction and the second direction.

3. The pultruded main beam according to claim 2, characterized in that, The inner wall surfaces of the first fault-tolerant groove (111) and / or the second fault-tolerant groove (112) are smooth curved surfaces.

4. The pultruded main beam according to claim 2, characterized in that, The length of the connecting hole (113) along the second direction is 0.5mm-2mm.

5. The pultruded main beam according to claim 1, characterized in that, The first fault-tolerant slot (111) and the second fault-tolerant slot (112) overlap or partially overlap in projection along the first direction.

6. The pultruded main beam according to claim 5, characterized in that, The connecting hole (113) is located at the lowest point of the first fault-tolerant groove (111) and the second fault-tolerant groove (112), and the connecting hole (113) extends along the first direction.

7. The pultruded main beam according to any one of claims 1 to 6, characterized in that, The pultrusion unit (110) is a pultrusion plate.

8. The pultruded main beam according to any one of claims 1 to 6, characterized in that, The pultrusion unit (110) includes a first pultrusion plate (114) and a second pultrusion plate (115); The length of the first pultruded plate (114) along the second direction is greater than the length of the second pultruded plate (115) along the second direction. The second pultruded plate (115) is located on one side of the first pultruded plate (114) along the second direction. The first fault-tolerant groove (111), the second fault-tolerant groove (112), and the connecting hole (113) are located on the second pultruded plate (115).

9. The pultruded main beam according to claim 1, characterized in that, An interlayer fabric is laid between two adjacent pultruded spliced ​​layers (100).

10. A wind turbine blade, characterized in that, The wind turbine blade includes the pultruded main beam (1000) as described in any one of claims 1 to 9.

11. A pultruded plate, characterized in that, The pultruded plate is used in wind turbine blades, and the pultruded plate has a first fault-tolerant groove (111), a second fault-tolerant groove (112), and a connecting hole (113). The first fault-tolerant groove (111) and the second fault-tolerant groove (112) are respectively located on opposite sides of the pultruded plate along the first direction, and the first fault-tolerant groove (111) and the second fault-tolerant groove (112) are adjacent to one side of the pultruded plate along the second direction; The connecting hole (113) has a plurality of them, and the plurality of connecting holes (113) are spaced apart along a third direction. The connecting hole (113) connects the first fault-tolerant slot (111) and the second fault-tolerant slot (112). Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

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