Pultrusion plate, pultrusion main beam and wind power blade

Abstract

The invention relates to a pultrusion plate, a pultrusion main beam and a wind power blade, the pultrusion main beam comprises a plurality of layers of pultrusion units, the multiple layers of pultrusion units are stacked and arranged in the vertical direction, interlayer cloth is laid between every two adjacent layers of pultrusion units, and each layer of pultrusion unit comprises a plurality of pultrusion plates; a plurality of pultrusion plates are arranged on each layer of pultrusion unit, the pultrusion plates of each layer of pultrusion unit are arranged in the width direction, transition grooves are formed in the two opposite faces, located in the vertical direction, of the pultrusion plates correspondingly, and the transition grooves are not communicated with the two opposite faces, located in the width direction, of the pultrusion plates; a first interface space exists between every two adjacent pultrusion plates in the width direction, and every two adjacent first interface spaces in the vertical direction are arranged in a staggered mode in the width direction and communicate with each other through the corresponding transition grooves. According to the technical scheme, the possibility of generation of interlayer defects of the pultrusion main beam can be reduced, and the overall performance of the wind power blade is improved.

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 or misalign.

[0003] This offset causes overlapping and misalignment between two adjacent transverse interfaces and / or two adjacent vertical interfaces of the pultruded main beam, resulting in blockage of the splice joint, reduced grouting efficiency, and poor interlayer grouting and wetting, thus affecting the overall performance of the blade. Summary of the Invention

[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 units stacked in a vertical direction, an interlayer fabric laid between adjacent pultruded units, each pultruded unit comprising a plurality of pultruded plates, the plurality of pultruded plates in each pultruded unit being arranged in a width direction, wherein the pultruded plates have transition grooves on opposite sides in the vertical direction, and the transition grooves are not connected to the opposite sides of the pultruded plates in the width direction; a first interface space exists between adjacent pultruded plates in the width direction, and adjacent first interface spaces in the vertical direction are staggered in the width direction and connected to each other through corresponding transition grooves.

[0006] The technical solution provided in this disclosure connects two adjacent first interface spaces in the vertical direction through corresponding transition grooves. As long as the first interface space is connected to the corresponding transition groove, the two adjacent first interface spaces in the vertical direction can be connected. Compared with the direct alignment and connection of two adjacent first interface spaces in the vertical direction, the transition grooves in this disclosure can form a fault-tolerant area, allowing two adjacent first interface spaces in the vertical direction to remain stably connected even with a certain offset when stacked. This allows the adhesive to flow smoothly vertically, avoiding the vertical flow space closure caused by stacking and affecting the flow of the adhesive. As a result, the adhesive can not only flow stably in the horizontal direction, but also in the vertical direction, thereby improving the injection efficiency, enabling the resin to penetrate effectively, ensuring the injection quality, avoiding delamination defects, and improving the overall performance of the wind turbine blade.

[0007] According to another aspect of this disclosure, a wind turbine blade is provided, the wind turbine blade comprising the pultruded main beam described above.

[0008] According to another aspect of this disclosure, a pultruded plate is provided for use in wind turbine blades. The pultruded plate has a transition groove on each of its two opposite sides in the vertical direction, and the transition groove is not connected to the two opposite sides of the pultruded plate in the width direction. The transition groove extends along the width direction and is adjacent to the two opposite sides of the pultruded plate in the width direction. The groove depth of the transition groove on the upper side of the pultruded plate is less than the groove depth of the transition groove on the lower side of the pultruded plate.

[0009] According to another aspect of this disclosure, a pultruded plate is provided for use in wind turbine blades. The pultruded plate has two upper transition grooves on its upper surface and two lower transition grooves on its lower surface. The upper and lower transition grooves are not connected to the opposite sides of the pultruded plate in the width direction. The two upper transition grooves form upper protrusions at both ends of the pultruded plate in the width direction and upper supports located between the two upper protrusions. The two lower transition grooves form lower protrusions at both ends of the pultruded plate in the width direction and lower supports located between the two lower protrusions. Attached Figure Description

[0010] 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.

[0011] Figure 1 A schematic cross-sectional view of a pultruded plate according to an embodiment of the present disclosure is shown;

[0012] Figure 2 It shows the use of Figure 1 The diagram shows a pultruded main beam formed by stacking pultruded plates.

[0013] Figure 3 A schematic cross-sectional view of three pultruded plates of different lengths according to an embodiment of the present disclosure is shown;

[0014] Figure 4 It shows the use of Figure 3 A schematic diagram of a pultruded main beam formed by stacking three pultruded plates of different lengths is shown.

[0015] Figure 5 A schematic cross-sectional view of a pultruded plate according to another embodiment of the present disclosure is shown;

[0016] Figure 6It shows the use of Figure 5 The diagram shows a pultruded main beam formed by stacking pultruded plates.

[0017] Figure 7 A schematic cross-sectional view of three pultruded plates of different lengths is shown according to another embodiment of the present disclosure;

[0018] Figure 8 It shows the use of Figure 7 A schematic diagram of an embodiment of a pultruded main beam formed by stacking three pultruded plates of different lengths;

[0019] Figure 9 It shows the use of Figure 7 A schematic diagram of another embodiment of a pultruded main beam formed by stacking three pultruded plates of different lengths;

[0020] Figure 10 A schematic cross-sectional view of a pultruded plate according to yet another embodiment of the present disclosure is shown;

[0021] Figure 11 A schematic cross-sectional view of three pultruded plates of different lengths is shown according to yet another embodiment of the present disclosure;

[0022] Figure 12 It shows the use of Figure 11 A schematic diagram showing a pultruded main beam formed by stacking three pultruded plates of different lengths;

[0023] Figure 13 A schematic cross-sectional view of a pultruded plate according to another embodiment of the present disclosure is shown;

[0024] Figure 14 A schematic cross-sectional view of three pultruded plates of different lengths is shown according to another embodiment of the present disclosure;

[0025] Figure 15 It shows the use of Figure 14 A schematic diagram showing a pultruded main beam formed by stacking three pultruded plates of different lengths;

[0026] Figure 16 A schematic diagram of the flow of adhesive during the grouting process of a pultruded main beam according to an embodiment of the present disclosure is shown.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1000, Pultruded main beam;

[0029] 100. Pultrusion unit; 110. Pultrusion plate; 111. Transition groove; 1111. Upper transition groove; 1112. Lower transition groove; 120. First interface space; 112. Upper protrusion; 113. Lower protrusion; 114. Upper support; 115. Lower support; 116. First pultrusion plate; 117. Second pultrusion plate; 118. Third pultrusion plate;

[0030] 200. Interlayer fabric;

[0031] 300. Vertical flow channel. Detailed Implementation

[0032] 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 or misalign vertically or horizontally. This overlap and misalignment causes misalignment between adjacent transverse and / or vertical interfaces of the pultruded main beam, resulting in joint blockage, reduced grouting efficiency, and poor interlayer wetting, ultimately affecting the overall performance of the blade.

[0033] To address this, the present disclosure employs an interlayer fabric laid between two pultruded plates, allowing the resin to effectively penetrate and bond between them. Furthermore, each pultruded plate has a transition groove extending along its width on opposite sides. The upper and lower ends of the vertical interface space formed by two adjacent pultruded plates in the transverse direction are connected to the corresponding transition groove, with at least one end having a gap with the bottom of the corresponding transition groove. This allows the transition groove to form a tolerance zone, enabling stable communication even with some offset between adjacent vertical interface spaces during stacking. This allows the resin to flow smoothly vertically, preventing the vertical flow gaps from closing due to stacking and affecting resin flow. Consequently, the resin can flow stably not only horizontally but also vertically, improving injection efficiency, ensuring effective resin penetration, guaranteeing injection quality, and preventing delamination defects.

[0034] 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.

[0035] like Figures 1 to 15As shown, this disclosure presents a pultruded main beam 1000, which serves as the main load-bearing structure for wind turbine blades, providing the blades with bending and torsional resistance. Specifically, the pultruded main beam 1000 includes several layers of pultruded units 100, which are stacked vertically. Each pultruded unit 100 includes several pultruded plates 110, which are arranged along the width direction, perpendicular to or intersecting the vertical direction. An interlayer fabric 200 is laid between adjacent pultruded units 100, thereby increasing the flow rate of the adhesive and improving the injection efficiency.

[0036] For example, the pultruded plate 110 may be made of materials such as glass fiber, carbon fiber, and carbon-glass composite. The interlayer fabric 200 may be made of glass fiber cloth, which, due to its rough surface, provides a larger contact area with the pultruded plate 110 and subsequent adhesive materials, resulting in a tighter interfacial bond. This improves the mechanical performance transfer efficiency of the entire wind turbine blade structure, allowing the various materials to work together more effectively. The interlayer fabric 200 between two adjacent pultruded plates 110 in the vertical direction may have one or more layers. The adhesive may be a resin.

[0037] It should be noted that the vertical direction defined in this disclosure refers to the vertical direction of the pultruded plate 110 when it is stacked.

[0038] Viewed from the cross-section of the pultruded plate 110, the overall cross-section of the pultruded plate 110 is rectangular. Transition grooves 111 are formed on opposite sides of the pultruded plate 110 in the vertical direction; that is, transition grooves 111 are formed on both the top and bottom surfaces of the pultruded plate 110. The transition grooves 111 extend along the width direction. The transition grooves 111 are not connected to the opposite sides of the pultruded plate 110 in the width direction, or in other words, as... Figure 1The transition groove 111 shown is connected to the left and right sides of the pultruded plate 110. There is a first interface space 120 between two adjacent pultruded plates 110 in the width direction. In the vertical direction, two adjacent first interface spaces 120 are staggered along the width direction and are connected to each other through the corresponding transition groove 111. In this way, two adjacent first interface spaces 120 in the vertical direction are connected to each other through corresponding transition grooves 111. As long as the first interface space 120 is connected to the corresponding transition groove 111, the two adjacent first interface spaces 120 in the vertical direction can be connected. Compared with the direct alignment and connection of two adjacent first interface spaces 120 in the vertical direction, the setting of the transition groove 111 of this disclosure can form a fault-tolerant area, so that the two adjacent first interface spaces in the vertical direction can still be stably connected even if there is a certain offset when stacked. This allows the adhesive to flow smoothly in the vertical direction, avoiding the vertical flow space closure caused by mutual stacking, which affects the flow of the adhesive. As a result, the adhesive can not only flow stably in the horizontal direction, but also flow stably in the vertical direction, thereby improving the injection efficiency, allowing the resin to penetrate effectively, ensuring the injection quality, avoiding delamination defects, and improving the overall performance of the wind turbine blade.

[0039] For example, such as Figure 16 As shown, 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 adhesives between other layers, and the adhesive at the bottom forms an upward flow at each vertical interface space, thus 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.

[0040] Specifically, the transition groove 111 located above the pultruded plate 110 is defined as the upper transition groove 1111, and the transition groove 111 located below the pultruded plate 110 is defined as the lower transition groove 1112. The projection of the first interface space 120 in the downward-upward direction is located within the lower transition groove 1112 of the adjacent upper pultruded plate 110, and the projection of the first interface space 120 in the upward-downward direction is located within the upper transition groove 1111 of the adjacent lower pultruded plate 110. Thus, the first interface space 120 can be directly connected to the adjacent first interface space 120 below it through the upper transition groove 1111 of the pultruded plate 110 below it and the lower transition groove 1112 of one of the pultruded plates 110 forming the first interface space 120. The first interface space 120 can also be directly connected to the adjacent first interface space 120 above it through the lower transition groove 1112 of the pultruded plate 110 above it and the upper transition groove 1111 of one of the pultruded plates 110 forming the first interface space 120, thereby simplifying the structure and facilitating production operations.

[0041] In some embodiments, two adjacent first interface spaces 120 in the vertical direction are interconnected through corresponding transition grooves 111 to form a vertical flow channel 300, and the adhesive flows along the vertical flow channel 300.

[0042] The vertical flow channel 300 can be set at an angle, for example, the vertical flow channel 300 can be set at an angle to the upper right or upper left.

[0043] like Figure 2 As indicated by the arrow, the vertical flow channel 300 can also be a continuous and reverse curved shape, or in other words, the vertical flow channel 300 can be roughly shaped like multiple S-shaped sections connected end to end. In this way, the shape of the vertical flow channel 300 can be achieved by misaligning the two stacked pultruded plates 110 at a certain angle, or by changing the length of the first pultruded plate 110 of two adjacent pultrusion units 100, which facilitates the stacking operation of multiple pultruded plates 110 and makes production easier.

[0044] In some embodiments, such as Figures 1 to 4As shown, in a pultruded plate 110, there is one upper transition groove 1111 and one lower transition groove 1112. Both the upper transition groove 1111 and the lower transition groove 1112 extend along the width direction, and the two ends of the upper transition groove 1111 and the lower transition groove 1112 along the width direction are respectively adjacent to the two opposite sides of the pultruded plate 110 in the width direction. Among them, the upper transition groove 1111 forms an upper protrusion 112 at both ends of the pultruded plate 110 in the width direction, and the lower transition groove 1112 forms a lower protrusion 113 at both ends of the pultruded plate 110 in the width direction. The groove depth of the upper transition groove 1111 is less than the groove depth of the lower transition groove 1112, or in other words, the protrusion height of the upper protrusion 112 is less than the protrusion height of the lower protrusion 113. Two upper protrusions 112 that participate in forming the same first interface space 120 extend into and are suspended in the lower transition groove 1112 of the adjacent pultruded plate 110 above, and two lower protrusions 113 that participate in forming the same first interface space 120 are supported in the upper transition groove 1111 of the pultruded plate 110 below.

[0045] In this way, the adhesive can communicate with the upper transition groove 1111 below the first interface space 120 through the interlayer fabric 200 below it. Furthermore, since the height of the upper protrusion 112 is less than the height of the lower protrusion 113, the distance between the upper part of the first interface space 120 and the lower transition groove 1112 above it is relatively large. The upper part of the first interface space 120 and the lower transition groove 1112 above it do not clamp the interlayer fabric 200 between them. Therefore, the adhesive can communicate with the lower transition groove 1112 above it through the gap between the upper part of the first interface space 120 and the lower transition groove 1112 above it, and through the interlayer fabric 200. This achieves the above-mentioned vertical communication between two adjacent first interface spaces 120 through corresponding transition grooves 111. Moreover, the larger distance between the upper part of the first interface space 120 and the lower transition groove 1112 above it is more conducive to the vertical flow of the adhesive, reducing the risk of clogging.

[0046] In some other embodiments, such as Figures 5 to 15As shown, in a pultruded plate 110, there are two upper transition grooves 1111 and two lower transition grooves 1112. The two upper transition grooves 1111 are respectively adjacent to both ends of the width direction of the pultruded plate 110, and the two lower transition grooves 1112 are respectively adjacent to both ends of the width direction of the pultruded plate 110. The two upper transition grooves 1111 form upper protrusions 112 at both ends of the width direction of the pultruded plate 110, and upper supports 114 located between the two upper protrusions 112. The two lower transition grooves 1112 form lower protrusions 113 at both ends of the width direction of the pultruded plate 110, and lower supports 115 located between the two lower protrusions 113. The lower supports 115 of the pultruded plate 110 are supported at least on the upper supports 114 of the adjacent lower pultruded plate 110. In this way, the upper and lower ends of the first interface space 120 are respectively suspended at the corresponding transition grooves 111, resulting in a large gap between the first interface space 120 and the corresponding transition grooves 111 to allow for the flow of the adhesive. This is more conducive to the vertical flow of the adhesive, reduces the risk of blockage, and ensures the unobstructed flow of the vertical channel 300. This also enables the two adjacent first interface spaces 120 in the vertical direction to be interconnected through the corresponding transition grooves 111. Furthermore, this arrangement can also increase the local gap in the lateral direction, improving the fluidity of the adhesive in the lateral direction. In addition, the two adjacent pultruded plates 110 are supported by the upper support 114 and the lower support 115 located in the middle, which can obtain a larger support area and ensure stacking stability.

[0047] For example, the upper transition groove 1111 and the lower transition groove 1112 are projected to each other in the vertical direction, or partially overlap. The upper transition groove 1111 and the lower transition groove 1112 have the same depth.

[0048] Among them, such as Figures 5 to 12 As shown, the top surface of the upper support 114 is flush with the top surfaces of the two upper protrusions 112, and the bottom surface of the lower support 115 is flush with the bottom surfaces of the two lower protrusions 113. During stacking, the two upper protrusions 112 that participate in forming the same first interface space 120 do not extend into the lower transition groove 1112 of the adjacent upper pultrusion plate 110, and the two lower protrusions 113 that participate in forming the same first interface space 120 do not extend into the upper transition groove 1111 of the adjacent lower pultrusion plate 110. Thus, there is no interlocking between adjacent pultrusion units 100, facilitating the sliding of the pultrusion plate 110 along the upper surface of the lower pultrusion unit 100 to the desired position during stacking, thus simplifying installation.

[0049] In practical applications, the distance between the top surface of the upper protrusion 112 and the bottom surface of the lower protrusion 113 along the vertical direction is defined as H1, and the distance between the top surface of the upper support 115 and the bottom surface of the lower support 114 along the vertical direction is defined as H3, where H1 = H3.

[0050] like Figures 13 to 15As shown, the top surface of the upper support 114 is lower than the top surfaces of the two upper protrusions 112, and the bottom surface of the lower support 115 is higher than the bottom surfaces of the two lower protrusions 113. The two upper protrusions 112 that participate in forming the same first interface space 120 extend into and are suspended within the lower transition grooves 1112 of the adjacent pultruded plate 110 above, and the two lower protrusions 113 that participate in forming the same first interface space 120 extend into and are suspended within the upper transition grooves 1111 of the pultruded plate 110 below. Thus, during stacking, the lower protrusions 113 of the pultruded plates 110 can be embedded into the corresponding upper transition grooves 1111 of the already stacked pultruded plates 110 to avoid lateral misalignment between the first interface space 120 and the upper transition grooves 1111, which would affect communication and ensure the formation of the vertical flow channel 300.

[0051] In practical applications, the distance between the top surface of the upper protrusion 112 and the bottom surface of the lower protrusion 113 along the vertical direction is defined as H1, the distance between the bottom of the upper transition groove 1111 and the bottom of the lower transition groove 1112 along the vertical direction is defined as H2, and the distance between the top surface of the upper support 115 and the bottom surface of the lower support 114 along the vertical direction is defined as H3, where H3-H2>H1-H3.

[0052] In this embodiment, as Figures 5 to 9 As shown, at least one of the two upper transition grooves 1111 and the two lower transition grooves 1112 can be a rectangular groove. Figures 10 to 13 As shown, at least one of the two upper transition grooves 1111 and the two lower transition grooves 1112 can be a curved groove.

[0053] In some embodiments, such as Figure 2 and Figure 6 As shown, each pultruded plate 110 in the pultruded main beam 1000 has the same shape. During stacking, adjacent pultruded units 100 can be staggered to a certain extent along the width direction to achieve the aforementioned continuous and reverse curved vertical flow channel 300. In this way, all the pultruded plates 110 used for stacking the pultruded main beam 1000 have the same shape, requiring only the production of a single type of pultruded plate 110, thus reducing production costs.

[0054] In some other embodiments, the pultruded main beam 1000 can be formed by stacking multiple pultruded plates 110 of different lengths. Specifically, the pultruded plate 110 may include a first pultruded plate 116, a second pultruded plate 117, and a third pultruded plate 118. The transition grooves 111, upper protrusions 112, and lower protrusions 113 of the first pultruded plate 116, the second pultruded plate 117, and the third pultruded plate 118 have the same dimensions. The width of the first pultruded plate 116 is smaller than the width of the third pultruded plate 118. The sum of the widths of the first pultruded plate 116 and the third pultruded plate 118 is equal to or approximately equal to twice the width of the second pultruded plate 117. The pultrusion unit 100 includes a first pultrusion unit and a second pultrusion unit, which are staggered and stacked in the vertical direction. Alternatively, the pultrusion units 100 in the pultruded main beam 1000 are divided into odd-numbered layers and even-numbered layers according to the vertical direction. The first pultrusion unit is one of the odd-numbered and even-numbered pultrusion units, and the second pultrusion unit is the other of the odd-numbered and even-numbered pultrusion units. The number of pultruded plates 110 in the first pultrusion unit can be the same as the number of pultruded plates 110 in the second pultrusion unit. The pultruded plates 110 in the first pultrusion unit are second pultruded plates 117. The pultruded plates 110 in the second pultrusion unit include one first pultruded plate 116, multiple second pultruded plates 117, and one third pultruded plate 118. The first pultruded plate 116 and the third pultruded plate 118 are located at both ends of the second pultrusion unit along the width direction, and the multiple second pultruded plates 117 are located between the first pultruded plate 116 and the third pultruded plate 118.

[0055] For example, such as Figure 3 and Figure 4 As shown, in the scheme where the pultruded plate 110 has only one upper transition groove 1111 and one lower transition groove 1112, the second pultruded unit can be stacked in a certain degree of misalignment relative to the first pultruded unit along the width direction.

[0056] For example, such as Figure 7 and Figure 8 As shown, in the scheme where the pultruded plate 110 has two rectangular upper transition grooves 1111 and two rectangular lower transition grooves 1112, the top surface of the upper support 114 is flush with the top surface of the upper protrusion 112, and the bottom surface of the lower protrusion 113 is flush with the bottom surface of the lower support 115, the ends of the first pultrusion unit and the second pultrusion unit along the width direction can be stacked flush to ensure the end support performance.

[0057] Of course, in actual operation, such as Figure 9 As shown, the ends of the first pultrusion unit and the second pultrusion unit may also have a certain degree of irregular misalignment and stacking along the width direction.

[0058] For example, such as Figure 11 and Figure 12As shown, in the configuration where the pultruded plate 110 has two curved upper transition grooves 1111 and two curved lower transition grooves 1112, and the top surface of the upper support 114 is flush with the top surface of the upper protrusion 112, and the bottom surface of the lower protrusion 113 is flush with the bottom surface of the lower support 115, the ends of the first pultrusion unit and the second pultrusion unit along the width direction can be stacked flush, thereby ensuring the support performance of the ends. Of course, in actual operation, the ends of the first pultrusion unit and the second pultrusion unit may also have a certain degree of irregular misalignment along the width direction.

[0059] For example, such as Figure 14 and Figure 15 As shown, in a configuration where the pultruded plate 110 has two rectangular upper transition grooves 1111 and two rectangular lower transition grooves 1112, the top surface of the upper support 114 is lower than the top surface of the upper protrusion 112, and the bottom surface of the lower protrusion 113 is lower than the bottom surface of the lower support 115, the second pultruded unit can be stacked relative to the first pultruded unit in the width direction by at least the width of one upper protrusion 112.

[0060] According to another aspect of this disclosure, a wind turbine blade is also provided, which includes the aforementioned pultruded main beam 1000.

[0061] 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 plates 110 and several interlayer fabrics 200 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 plates 110 and several interlayer fabrics 200 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.

[0062] 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.

[0063] According to another aspect of this disclosure, a pultruded plate 110 is also provided, which is used in wind turbine blades. A transition groove 111 is provided on each of the two opposite sides of the pultruded plate 110 in the vertical direction, and the transition groove 111 is not connected to the two opposite sides of the pultruded plate 110 in the width direction. The transition groove 111 extends along the width direction and is adjacent to the two opposite sides of the pultruded plate 110 in the width direction. The groove depth of the transition groove 111 on the upper side of the pultruded plate 110 is less than the groove depth of the transition groove 111 on the lower side of the pultruded plate 110.

[0064] It should be noted that the specific structure of the pultruded plate 110 can be found in the detailed description in the above embodiments, and will not be repeated here.

[0065] According to another aspect of this disclosure, a pultruded plate 110 is also provided, which is used in wind turbine blades. The pultruded plate 110 has two upper transition grooves 1111 on its upper surface and two lower transition grooves 1112 on its lower surface. The upper transition grooves 1111 and the lower transition grooves 1112 are not connected to the opposite sides of the pultruded plate 110 in the width direction. The two upper transition grooves 1111 form upper protrusions 112 at both ends of the pultruded plate 110 in the width direction, and upper supports 114 located between the two upper protrusions 112. The two lower transition grooves 1112 form lower protrusions 113 at both ends of the pultruded plate 110 in the width direction, and lower supports 115 located between the two lower protrusions 113.

[0066] Furthermore, the top surface of the upper support 114 is flush with the top surfaces of the two upper protrusions 112, and the bottom surface of the lower support 115 is flush with the bottom surfaces of the two lower protrusions 113; or, the top surface of the upper support 114 is lower than the top surfaces of the two upper protrusions 112, and the bottom surface of the lower support 115 is higher than the bottom surfaces of the two lower protrusions 113.

[0067] It should be noted that the specific structure of the pultruded plate 110 can be found in the detailed description in the above embodiments, and will not be repeated here.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 several layers of pultruded units (100), which are stacked vertically. An interlayer fabric (200) is laid between adjacent layers of pultruded units (100). Each layer of pultruded unit (100) includes several pultruded plates (110), which are arranged along the width direction. The pultruded plate (110) has transition grooves (111) on its two opposite sides in the vertical direction, and the transition grooves (111) are not connected to the two opposite sides of the pultruded plate (110) in the width direction; there is a first interface space (120) between two adjacent pultruded plates (110) in the width direction, and the two adjacent first interface spaces (120) in the vertical direction are staggered along the width direction and are connected to each other through the corresponding transition grooves (111).

2. The pultruded main beam according to claim 1, characterized in that, The transition groove (111) located above the pultruded plate (110) is defined as the upper transition groove (1111), and the transition groove (111) located below the pultruded plate (110) is defined as the lower transition groove (1112). The projection of the first interface space (120) in the downward direction is located in the lower transition groove (1112) of the upper adjacent pultruded plate (110), and the projection of the first interface space (120) in the upward direction is located in the upper transition groove (1111) of the lower adjacent pultruded plate (110).

3. The pultruded main beam according to claim 2, characterized in that, Two adjacent first interface spaces (120) in the vertical direction are interconnected by the corresponding transition grooves (111) to form a vertical flow channel (300), which has a continuous and opposite curved shape.

4. The pultruded main beam according to claim 3, characterized in that, In one of the pultruded plates (110), there is one upper transition groove (1111) and one lower transition groove (1112); The upper transition groove (1111) forms an upper protrusion (112) at both ends of the pultruded plate (110) in the width direction, and the lower transition groove (1112) forms a lower protrusion (113) at both ends of the pultruded plate (110) in the width direction. The groove depth of the upper transition groove (1111) is smaller than the groove depth of the lower transition groove (1112). The two upper protrusions (112) that participate in forming the same first interface space (120) extend into and are suspended in the lower transition groove (1112) of the adjacent pultruded plate (110) above, and the two lower protrusions (113) that participate in forming the same first interface space (120) are supported in the upper transition groove (1111) of the pultruded plate (110) below.

5. The pultruded main beam according to claim 3, characterized in that, In one of the pultruded plates (110), there are two upper transition grooves (1111) and two lower transition grooves (1112); The two upper transition grooves (1111) form upper protrusions (112) at both ends of the pultruded plate (110) in the width direction, and an upper support (114) located between the two upper protrusions (112); the two lower transition grooves (1112) form lower protrusions (113) at both ends of the pultruded plate (110) in the width direction, and a lower support (115) located between the two lower protrusions (113); The lower support (115) of the pultruded plate (110) is supported at least on the upper support (114) of the adjacent pultruded plate (110) below.

6. The pultruded main beam according to claim 5, characterized in that, The top surface of the upper support (114) is flush with the top surfaces of the two upper protrusions (112), and the bottom surface of the lower support (115) is flush with the bottom surfaces of the two lower protrusions (113).

7. The pultruded main beam according to claim 5, characterized in that, The top surface of the upper support (114) is lower than the top surface of the two upper protrusions (112), and the bottom surface of the lower support (115) is higher than the bottom surface of the two lower protrusions (113). The two upper protrusions (112) that participate in forming the same first interface space (120) extend into and are suspended in the lower transition groove (1112) of the adjacent upper pultruded plate (110), and the two lower protrusions (113) that participate in forming the same first interface space (120) extend into and are suspended in the upper transition groove (1111) of the lower pultruded plate (110).

8. The pultruded main beam according to claim 5, characterized in that, At least one of the two upper transition grooves (1111) and the two lower transition grooves (1112) is a rectangular groove; or, At least one of the two upper transition grooves (1111) and the two lower transition grooves (1112) is a curved groove.

9. The pultruded main beam according to any one of claims 1 to 8, characterized in that, Each of the pultruded plates (110) in the pultruded main beam (1000) has the same shape.

10. The pultruded main beam according to any one of claims 1 to 8, characterized in that, The pultruded plate (110) includes a first pultruded plate (116), a second pultruded plate (117), and a third pultruded plate (118). The transition groove (111), upper protrusion (112), and lower protrusion (113) of the first pultruded plate (116), the second pultruded plate (117), and the third pultruded plate (118) have the same dimensions. The width of the first pultruded plate (116) is smaller than the width of the third pultruded plate (118). The sum of the widths of the first pultruded plate (116) and the third pultruded plate (118) is equal to twice the width of the second pultruded plate (117). The pultrusion unit (100) includes a first pultrusion unit and a second pultrusion unit, which are staggered and stacked in a vertical direction. The pultrusion plates (110) of the first pultrusion unit are the second pultrusion plates (117); The second pultrusion unit includes a first pultrusion plate (110), a plurality of second pultrusion plates (117), and a third pultrusion plate (118). The first pultrusion plate (116) and the third pultrusion plate (118) are located at both ends of the second pultrusion unit along the width direction, and the plurality of second pultrusion plates (117) are located between the first pultrusion plate (116) and the third pultrusion plate (118).

11. 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 10.

12. A pultruded plate, used in wind turbine blades, characterized in that, The pultruded plate (110) has a transition groove (111) on each of its two opposite sides in the vertical direction, and the transition groove (111) is not connected to the two opposite sides of the pultruded plate (110) in the width direction. The transition groove (111) extends along the width direction and is located on opposite sides of the pultruded plate (110) in the width direction. The groove depth of the transition groove (111) on the pultruded plate (110) is less than the groove depth of the transition groove (111) on the pultruded plate (110).

13. A pultruded plate, used in wind turbine blades, characterized in that, The pultruded plate (110) has two upper transition grooves (1111) on its upper surface and two lower transition grooves (1112) on its lower surface. The upper transition grooves (1111) and the lower transition grooves (1112) are not connected to the two opposite sides of the pultruded plate (110) in the width direction. The two upper transition grooves (1111) form upper protrusions (112) at both ends of the width direction of the pultruded plate (110), and an upper support (114) located between the two upper protrusions (112); the two lower transition grooves (1112) form lower protrusions (113) at both ends of the width direction of the pultruded plate (110), and a lower support (115) located between the two lower protrusions (113).

14. The pultruded plate according to claim 13, characterized in that, The top surface of the upper support (114) is flush with the top surfaces of the two upper protrusions (112), and the bottom surface of the lower support (115) is flush with the bottom surfaces of the two lower protrusions (113); or, The top surface of the upper support (114) is lower than the top surface of the two upper protrusions (112), and the bottom surface of the lower support (115) is higher than the bottom surface of the two lower protrusions (113).

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