Pultrusion plate assembly, pultrusion main beam and wind power blade

Abstract

The invention relates to the technical field of wind power equipment, and provides a pultrusion plate assembly, a pultrusion main beam and a wind power blade, the pultrusion plate assembly comprises a tenon, a tenon tail and a plurality of pultrusion plates, the multiple pultrusion plates are arranged side by side, the tenon and the tenon tail are located at the front edges and the rear edges of the multiple pultrusion plates respectively, and the tenon tail is located at the rear edge of the multiple pultrusion plates. The opposite surfaces between the tenons and the pultrusion plates, between the adjacent pultrusion plates and between the pultrusion plates and the tenon tails are matched in shape and are provided with contact surfaces, and the contact surfaces are arc-shaped curved surfaces. According to the pultrusion plate assembly, the pultrusion main beam and the wind power blade, gaps between the adjacent pultrusion plates of the main beam are eliminated, the problems that the adjacent pultrusion plates of the main beam are rich in resin and stacked are solved, the adjacent pultrusion plates can rotate and do not move, and therefore the shape follow-up performance between the pultrusion main beam and the shell is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power equipment, and in particular to a pultruded plate assembly, a pultruded main beam and a wind power blade. Background Art

[0002] Blades are crucial components of wind turbines, typically consisting of an airfoil shell and a main beam. The main beam is the primary load-bearing component of the wind turbine blade structure, carrying the majority of the blade's bending load. Its strength and stiffness directly impact the blade's load-bearing capacity.

[0003] In the existing technology, the main beam is mainly composed of multiple pultruded plates spliced ​​and stacked. However, due to the presence of multiple splicing gaps in the chord direction of the main beam, adjacent pultruded plates are easily stacked due to the influence of the straightness of the pultruded plates, and the conformality between the pultruded main beam and the blade shell is poor. Summary of the Invention

[0004] The present invention provides a pultruded plate assembly, a pultruded main beam and a wind turbine blade, which are used to solve the defects in the prior art that adjacent pultruded plates are prone to stacking and the conformability between the pultruded main beam and the blade shell is poor. The gaps between the pultruded plates are eliminated, the resin-rich and stacking problems between the plates are avoided, and the conformability between the pultruded main beam and the shell is improved. At the same time, the new pultruded main beam structure does not require special tensioning tooling to ensure the integrity of the main beam, saving the production and manufacturing costs of the tooling.

[0005] The present invention provides a pultruded plate assembly, comprising a tenon, a tenon tail and a plurality of pultruded plates, wherein the plurality of pultruded plates are arranged side by side, and the tenon and the tenon tail are respectively located at the leading edge and the trailing edge of the plurality of pultruded plates, and the relative surfaces between the tenon and the pultruded plates, between adjacent pultruded plates, and between the pultruded plates and the tenon tail are adapted in shape and have contact surfaces, and the contact surfaces are all arc-shaped curved surfaces.

[0006] According to a pultruded plate assembly provided by the present invention, the cross-section of the arc-shaped surface is semicircular or elliptical semicircular.

[0007] According to a pultruded plate assembly provided by the present invention, each of the pultruded plates includes: a first end, a second end and a pultruded portion arranged between the first end and the second end, the pultruded portion is formed on two side surfaces between the first end and the second end, and the pultruded portions of different shapes are respectively arranged on both sides of the pultruded plate; the tenon and the tenon tail, one of which is a convex structure facing the side of the pultruded plate, and the other is a concave structure facing the side of the pultruded plate.

[0008] According to a pultruded plate assembly provided by the present invention, the pultruded plate includes a first pultruded unit and a second pultruded unit, both sides of the first pultruded unit are concave structures, both sides of the second pultruded unit are convex structures, and the first pultruded unit and the second pultruded unit are alternately distributed.

[0009] According to a pultruded plate assembly provided by the present invention, the number of the first pultrusion units and the second pultrusion units is the same; one of the first pultrusion unit and the second pultrusion unit is adapted to the tenon, and the other is adapted to the tenon tail.

[0010] According to a pultruded plate assembly provided by the present invention, the number of the first pultrusion unit is one more than the number of the second pultrusion unit, and the tenon and the tenon tail are both protruding structures on the side facing the first pultrusion unit.

[0011] According to a pultruded plate assembly provided by the present invention, the number of the first pultrusion units is one less than the number of the second pultrusion units, and the tenon and the tenon tail are both recessed structures on the sides facing the second pultrusion unit.

[0012] According to a pultruded plate assembly provided by the present invention, the width of the pultruded plate ranges from 40 to 75 mm.

[0013] The present invention also provides a pultruded main beam, comprising a multi-layer pultruded plate assembly, wherein the multi-layer pultruded plate assembly is stacked along its thickness direction, and the pultruded plate assembly is the pultruded plate assembly as described in any one of the above items.

[0014] The present invention also provides a wind turbine blade, comprising an outer shell and the pultruded main beam as described above, wherein the pultruded main beam is arranged on the inner side of the outer shell.

[0015] The pultruded plate assembly provided by the present invention is obtained by arranging multiple pultruded plates side by side, and the tenons and tenons are respectively located at the leading edges and trailing edges of the multiple pultruded plates. The relative surfaces between the tenons and the pultruded plates, between adjacent pultruded plates, and between the pultruded plates and the tenons are adapted in shape and have contact surfaces. The contact surfaces are all arc-shaped surfaces, which not only eliminates the gaps between the pultruded plates and avoids the occurrence of resin-rich and stacking problems between the plates, but also allows adjacent pultruded plates to rotate without moving, thereby greatly improving the conformability between the pultruded main beam and the shell.

[0016] The present invention also provides a pultruded main beam and a wind turbine blade, which include the pultruded plate assembly described above and thus have the various advantages described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic structural diagram of the pultruded plate assembly provided by the present invention before splicing.

[0019] Figure 2 It is a structural schematic diagram of another embodiment of the pultruded plate assembly provided by the present invention.

[0020] Figure 3 It is a structural schematic diagram of another embodiment of the pultruded plate provided by the present invention.

[0021] Figure 4 It is a schematic structural diagram of the pultruded main beam provided by the present invention before splicing.

[0022] Reference numerals: 1. Tenon; 2. Tenon tail; 3. Pultruded plate; 31. First end; 32. Second end; 33. Pultruded part; 301. First pultrusion unit; 302. Second pultrusion unit. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] The pultruded main beam is the main load-bearing component in the wind turbine blade structure. It is composed of multiple layers of pultruded plate components. During the molding process of the main beam in the existing technology, not only are there gaps between adjacent pultruded plates, which makes it easy for pultruded plates to stack during the production process, but the conformability between the pultruded main beam and the blade shell is poor, which easily leads to the problem of resin richness.

[0026] See attached Figure 1-3 In response to the above technical problems, an embodiment of the present invention provides a pultruded plate assembly, comprising a tenon 1, a tenon tail 2 and multiple pultruded plates 3, wherein the multiple pultruded plates 3 are arranged side by side, and the tenon 1 and the tenon tail 2 are respectively located at the leading edge and the trailing edge of the multiple pultruded plates 3, and the relative surfaces between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2 are adapted to each other and have contact surfaces, and the contact surfaces are all arc-shaped surfaces, which not only eliminates the gaps between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2, avoiding the occurrence of resin-rich and stacking problems between the plates, but also allows the adjacent pultruded plates 3 to rotate without moving, thereby greatly improving the conformability between the pultruded main beam and the shell, and also solving the problem of resin-rich under the pultruded main beam.

[0027] The leading edges and trailing edges of the plurality of pultruded plates 3 may be understood as two sides of the pultruded plates 3 in the width direction.

[0028] The adjacent pultruded plates 3 are connected as a whole through the mortise and tenon structure, which fundamentally avoids the generation of gaps between the adjacent pultruded plates 3 and avoids the occurrence of resin-rich and stacking problems between the main beam pultruded plates.

[0029] In addition, the contact surface is set as an arc surface, so that the space between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2 is limited in the thickness direction, and rotation can occur between adjacent pultruded plates without moving, thereby preventing stacking problems. Figure 1 The up and down directions in the width direction refer to Figure 1 The length direction is perpendicular to the paper surface.

[0030] In a feasible embodiment of the present invention, the cross-section of the arcuate surface is semicircular or partially elliptical, as long as relative rotation between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2 can be achieved.

[0031] like Figure 2As shown, in a feasible embodiment of the present invention, each pultruded plate 3 includes: a first end 31, a second end 32 and a pultruded portion 33 provided between the first end 31 and the second end 32. The pultruded portion 33 is formed on two side surfaces between the first end 31 and the second end 32. Pultruded portions 33 of different shapes are provided on both sides of the pultruded plate 3. Usually, the pultruded portion 33 on one side is a convex structure, and the pultruded portion 33 on the other side is a concave structure. That is, when the pultruded portion 33 of the pultruded plate 3 facing the tenon 1 is a convex structure, the pultruded portion 33 of the pultruded plate 3 facing the tenon tail 2 is a concave structure. Moreover, the shapes of the convex structure and the concave structure here are adapted to ensure that adjacent pultruded plates 3 can be connected into a whole through the mortise and tenon structure.

[0032] In the above embodiment, the tenon 1 and the tenon tail 2, one of which has a convex structure facing the pultruded plate 3, and the other has a concave structure facing the pultruded plate 3. That is, when the tenon 1 has a convex structure facing the pultruded plate 3, the tenon tail 2 has a concave structure facing the pultruded plate 3; conversely, when the tenon 1 has a concave structure facing the pultruded plate 3, the tenon tail 2 has a convex structure facing the pultruded plate 3.

[0033] like Figure 3 As shown, in another feasible embodiment of the present invention, the pultruded plate 3 includes a first pultruded unit 301 and a second pultruded unit 302, both sides of the first pultruded unit 301 are recessed structures, and both sides of the second pultruded unit 302 are protruding structures, and the first pultruded unit 301 and the second pultruded unit 302 are alternately distributed. In other words, the shapes of the first pultruded unit 301 and the second pultruded unit 302 are not the same. The first pultruded unit 301 and the second pultruded unit 302 are alternately distributed, and a pultruded plate 3 with a protruding structure on one side and a recessed structure on the other side can be formed to match the tenon 1 and the tenon tail 2. The specific distribution form of the first pultruded unit 301 and the second pultruded unit 302 can be selected according to actual conditions. Correspondingly, one of the tenon 1 and the tenon tail 2 has a protruding structure facing the side of the pultruded plate 3, and the other has a recessed structure facing the side of the pultruded plate 3.

[0034] Furthermore, the number of the first pultrusion units 301 and the second pultrusion units 302 is the same; among the first pultrusion units 301 and the second pultrusion units 302 , one is adapted to the tenon 1 , and the other is adapted to the tenon tail 2 .

[0035] For example, when the first pultrusion unit 301 is arranged close to the tenon 1, the second pultrusion unit 302 is arranged close to the tenon tail 2; the side of the tenon 1 facing the first pultrusion unit 301 is a convex structure, and the side of the tenon tail 2 facing the second pultrusion unit 302 is a concave structure.

[0036] For another example, when the first pultrusion unit 301 is arranged close to the tenon 2, the second pultrusion unit 302 is close to the tenon 1; the side of the tenon 1 facing the second pultrusion unit 302 is a concave structure, and the side of the tenon 2 facing the first pultrusion unit 301 is a convex structure.

[0037] In other words, no matter how the first pultrusion unit 301, the second pultrusion unit 302, the tenon 1 and the tenon tail 2 are structurally arranged, as long as the tenon 1, the first pultrusion unit 301, the second pultrusion unit 302 and the tenon tail 2 can be connected into a whole through the mortise and tenon structure, the gap between adjacent impact plates can be fundamentally avoided, and the occurrence of resin-rich and stacking problems between adjacent pultruded plates can be avoided.

[0038] Furthermore, since the contact surface can rotate without moving, the conformability between the pultruded main beam and the blade shell can be greatly improved.

[0039] In another feasible embodiment of the present invention, the number of the first pultruded units 301 can be one more than the number of the second pultruded units 302, and the first pultruded units 301 and the second pultruded units 302 are alternately distributed, that is, the distribution of the pultruded plates 3 is the first pultruded unit 301, the second pultruded unit 302, the first pultruded unit 301, the second pultruded unit 302...the first pultruded unit 301. Therefore, since both sides of the first pultruded unit 301 are recessed structures, and the number of the first pultruded unit 301 is one more than the number of the second pultruded units 302, the first pultruded unit 301 is close to the tenon 1 and the tenon tail 2, and the sides of the tenon 1 and the tenon tail 2 facing the first pultruded unit 301 are both convex structures, so that the tenon 1, the first pultruded unit 301, the second pultruded unit 302 and the tenon tail 2 can be connected into a whole through the mortise and tenon structure, which can fundamentally avoid the generation of gaps between adjacent pultruded plates 3 and avoid the occurrence of resin-rich and stacking problems between adjacent pultruded plates.

[0040] In the above embodiment, the number of the first pultrusion units 301 and the second pultrusion units 302 can be set according to actual conditions and will not be described in detail here.

[0041] In another feasible embodiment of the present invention, the number of the first pultrusion units 301 is one less than the number of the second pultrusion units 302, and the first pultrusion units 301 and the second pultrusion units 302 are distributed alternately, that is, the distribution of the pultruded plate 3 is the second pultrusion unit 302, the first pultrusion unit 301, the second pultrusion unit 302, the first pultrusion unit 301...the second pultrusion unit 302. Therefore, since both sides of the second pultruded unit 302 are protruding structures, and the number of the second pultruded unit 302 is one more than the first pultruded unit 301, the second pultruded unit 302 is close to the tenon 1 and the tenon tail 2. Because both sides of the second pultruded unit 302 are protruding structures, the tenon 1 and the tenon tail 2 facing the second pultruded unit 302 are both recessed structures, so that the tenon 1, the first pultruded unit 301, the second pultruded unit 302 and the tenon tail 2 can be connected into a whole through the mortise and tenon structure, which can fundamentally avoid the generation of gaps between adjacent pultruded plates 3 and avoid the occurrence of resin-rich and stacking problems between adjacent pultruded plates 3.

[0042] Moreover, the first pultrusion unit 301 and the second pultrusion unit 302 can rotate without moving, thereby greatly improving the conformability between the pultrusion main beam and the shell, and solving the problem of resin-rich production under the pultrusion main beam.

[0043] In the above embodiment, the number of the first pultrusion units 301 and the second pultrusion units 302 can be set according to actual conditions and will not be described in detail here.

[0044] In a feasible embodiment of the present invention, the width of the pultruded plate 3 ranges from 40 to 75 mm, which improves the conformability between the pultruded main beam and the blade shell and controls the suspension gap between the pultruded plate and the blade shell to within 0.5 mm.

[0045] The present invention provides a method for manufacturing a pultruded plate assembly, comprising: S1. Release multiple pultruded plates of set lengths through the main beam unwinding device and place them on the main beam placement tool; and the multiple pultruded plates are arranged side by side along the width direction.

[0046] S2. Place the tenon 1 and the tenon tail 2 on the front and rear edges of the pultruded plate 3, and the lengths of the tenon 1 and the tenon tail 2 are consistent with the length of the pultruded plate 3; wherein, the relative surfaces between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2 are adapted to form contact surfaces, and the contact surfaces are all arc-shaped curved surfaces.

[0047] In the above steps, the cross section of the arc-shaped surface may be semicircular or partially elliptical.

[0048] S3, extruding the tenon 1, the plurality of pultruded plates 3 and the tenon tail 2 to form a pultruded plate assembly; S4. Stack the multiple layers of pull plate assemblies to form a pull plate main beam.

[0049] Furthermore, in step S4, the multi-layer pull plate assembly is stacked by vacuum adsorption, without the need to use specific tooling to ensure the conformability between the pultruded main beam and the shell, thus saving the production cost of the tooling.

[0050] like Figure 4 As shown, the second embodiment of the present invention is to provide a pultruded main beam, including a multi-layer pultruded plate assembly, which is stacked along its thickness direction. The pultruded plate assembly is a pultruded plate assembly as described in any of the above embodiments.

[0051] Among them, the pultruded plate assembly includes a tenon 1, a tenon tail 2 and multiple pultruded plates 3. The multiple pultruded plates 3 are arranged side by side, and the tenon 1 and the tenon tail 2 are respectively located at the head and tail of the multiple pultruded plates 3. The relative surfaces between the tenon 1 and the pultruded plate 3, between adjacent pultruded plates 3, and between the pultruded plate 3 and the tenon tail 2 are adapted to each other and have contact surfaces. The contact surfaces are all arc-shaped surfaces, which not only eliminates the gaps between the pultruded plates 3 and avoids the occurrence of resin-rich and stacking problems between the plates, but also allows adjacent pultruded plates 3 to rotate without moving, thereby greatly improving the conformability between the pultruded main beam and the shell, and also solves the problem of resin-rich under the pultruded main beam.

[0052] A third embodiment of the present invention is a wind turbine blade, comprising an outer shell and the pultruded main beam as described above, wherein the pultruded main beam is arranged on the inner side of the outer shell.

[0053] The wind turbine blade provided in the third aspect of the present invention has the various advantages as described above because it includes the pultruded main beam as described above.

[0054] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without contradiction.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pultruded plate assembly, characterized in that: The invention comprises a tenon (1), a tenon tail (2) and a plurality of pultruded plates (3), wherein the plurality of pultruded plates (3) are arranged side by side, and the tenon (1) and the tenon tail (2) are respectively located at the front edge and the rear edge of the plurality of pultruded plates (3), and the relative surfaces between the tenon (1) and the pultruded plates (3), between adjacent pultruded plates (3), and between the pultruded plates (3) and the tenon tail (2) are matched in shape and have contact surfaces, and the contact surfaces are all arc-shaped curved surfaces.

2. The pultruded plate assembly according to claim 1, characterized in that: The cross section of the arc-shaped surface is semicircular or partially elliptical.

3. The pultruded plate assembly according to claim 1, characterized in that: Each of the pultruded plates (3) comprises: a first end (31), a second end (32) and a pultruded portion (33) arranged between the first end (31) and the second end (32); the pultruded portion (33) is formed on two side surfaces between the first end (31) and the second end (32); and the pultruded portions (33) of different shapes are respectively arranged on both sides of the pultruded plate (3); and the tenon (1) and the tenon tail (2), one of which is a convex structure facing the side of the pultruded plate (3), and the other is a concave structure facing the side of the pultruded plate (3).

4. The pultruded plate assembly according to claim 1 or 2, characterized in that: The pultruded plate (3) comprises a first pultruded unit (301) and a second pultruded unit (302), both sides of the first pultruded unit (301) are recessed structures, both sides of the second pultruded unit (302) are convex structures, and the first pultruded unit (301) and the second pultruded unit (302) are alternately distributed.

5. The pultruded plate assembly according to claim 4, characterized in that: The number of the first pultrusion units (301) and the number of the second pultrusion units (302) are the same; one of the first pultrusion units (301) and the second pultrusion units (302) is adapted to the tenon (1), and the other is adapted to the tenon tail (2).

6. The pultruded plate assembly according to claim 4, characterized in that The number of the first pultrusion units (301) is one more than the number of the second pultrusion units (302), and the tenon (1) and the tenon tail (2) are both protruding structures on a side facing the first pultrusion unit (301).

7. The pultruded plate assembly according to claim 4, characterized in that: The number of the first pultrusion units (301) is one less than the number of the second pultrusion units (302), and the tenon (1) and the tenon tail (2) are both recessed structures on one side facing the second pultrusion unit (302).

8. The pultruded plate assembly according to claim 3, characterized in that: The width of the pultruded plate (3) is in the range of 40-75 mm.

9. A pultruded main beam, characterized in that: It comprises a multi-layer pultruded plate assembly, wherein the multi-layer pultruded plate assembly is stacked along the thickness direction thereof, and the pultruded plate assembly is the pultruded plate assembly according to any one of claims 1 to 8.

10. A fan blade, characterized in that: include: shell; The pultruded main beam as described in claim 9 is arranged on the inner side of the outer shell.

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