A main beam, a blade and a wind turbine

Abstract

The utility model provides a kind of main girder, blade and wind driven generator, main girder includes pultrusion plate, interlayer fabric, flow guide medium, multiple pultrusion plates are along the thickness direction of pultrusion plate stacked and are along the direction perpendicular to the thickness direction of pultrusion plate spliced setting;Interlayer fabric is arranged at interval between two pultrusion plates in stacking direction;Flow guide medium is arranged at interval between two pultrusion plates in splicing direction, and flow guide medium is used to flow injection adhesive from one side of pultrusion plate in stacking direction to the other side of pultrusion plate in stacking direction.The utility model increases flow guide medium between two spliced pultrusion plates, and the gap between two pultrusion plates can be effectively controlled by flow guide medium, and injection resistance between two is reduced, so not only the problem of interlayer half dry yarn defect is fundamentally solved, but also the penetration efficiency of injection adhesive of main girder can be improved, and then injection efficiency is improved, and injection time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a main beam, blades, and wind turbine. Background Technology

[0002] With the ever-increasing global demand for clean energy, wind power, as a renewable and pollution-free energy source, is experiencing rapid development. Wind turbine blades are one of the core components, and their performance and quality directly affect the efficiency and reliability of wind power generation. In recent years, to improve the load-bearing capacity of blades and increase production efficiency, the wind power industry has begun to adopt a new blade main beam manufacturing process. This process involves stacking pultruded plates together to form the blade's main beam, and then using an adhesive injection method to integrally mold the main beam with the blade shell. This structural design fully leverages the high strength and high rigidity of pultruded plates, effectively intercepting bending loads on the blade in the rotational direction, thereby significantly improving the overall performance of the blade.

[0003] However, in actual production, the stacking process of this pultruded sheet main beam faces some technical challenges that urgently need to be addressed. Specifically, when adjacent pultruded sheets are stacked, they overlap and misalign, causing blockage at the splice seams. This problem not only significantly reduces the efficiency of adhesive injection but also leads to poor interlayer wetting and semi-dry yarn defects in the fabric layers of the pultruded sheet. Utility Model Content

[0004] The purpose of this utility model is to provide a main beam, blade, and wind turbine, which aims to improve the penetration efficiency of the adhesive in the main beam, reduce semi-dry yarn defects, and shorten the infusion time during the manufacturing process of wind turbine blades.

[0005] To solve the above-mentioned technical problems, the present invention provides a main beam, comprising: Pultruded plates, wherein a plurality of said pultruded plates are stacked along the thickness direction of said pultruded plates and are spliced ​​together in a direction perpendicular to the thickness direction of said pultruded plates; Interlayer fabric, wherein the interlayer fabric is provided at intervals between two adjacent pultruded plates in the stacking direction; A flow guiding medium is provided at intervals between two adjacent pultruded plates in the splicing direction. The flow guiding medium is used to guide the infused adhesive from one side of the pultruded plate in the stacking direction to the other side of the pultruded plate in the stacking direction.

[0006] In some embodiments, between two adjacent pultruded plates in the splicing direction, the flow guiding medium extends in a direction perpendicular to the stacking direction and the splicing direction; or... Between two adjacent pultruded plates in the splicing direction, a plurality of flow guiding media are provided at intervals along a direction perpendicular to the stacking direction and the splicing direction.

[0007] In some embodiments, the flow guiding medium covers one end of the pultruded plate in the splicing direction.

[0008] In some embodiments, the dimension of the guiding medium in the stacking direction is not less than the dimension of the joint of each stack of pultruded plates in the stacking direction; or, Between two adjacent stacks of pultruded plates, a plurality of flow guiding media arranged along the stacking direction are sequentially connected.

[0009] In some embodiments, the pultruded plate has a splicing end that is spliced ​​with another pultruded plate, the splicing end being provided with two chamfered edges opposite each other in the stacking direction, and the flow guiding medium including a spacer portion that is attached to the end face of the splicing end.

[0010] In some embodiments, the guiding medium further includes an attachment portion connected to the spacer portion, the attachment portion being attached to the chamfered edge.

[0011] In some embodiments, the spacing between two adjacent pultruded plates in the splicing direction is 0.5 mm to 2 mm.

[0012] In some embodiments, the flow guiding medium is a flow guiding medium made of glass fiber or carbon fiber.

[0013] To achieve the above objectives, the present invention also provides a blade, including the aforementioned main beam.

[0014] To achieve the above objectives, this utility model also provides a wind turbine generator, including the aforementioned blades.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The main beam of this invention incorporates a guiding medium between two spliced ​​pultruded plates. This medium effectively controls the gap between the two pultruded plates and reduces the injection resistance between them. This not only fundamentally solves the problem of semi-dry yarn defects between layers, but also effectively wets the interlayer fabric on the pultruded plates, improving the penetration efficiency of the adhesive used in the main beam injection, thereby increasing the injection efficiency and shortening the injection time. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the main beam in the first embodiment of the present invention; Figure 2 This is a schematic diagram of the main beam in the second embodiment of the present invention; Figure 3 This is a schematic diagram of the main beam in the third embodiment of this utility model.

[0018] Explanation of reference numerals in the accompanying drawings of this utility model: Main beam 100, pultruded plate 1, splicing end 11, chamfered edge 12, interlayer fabric 2, flow guiding medium 3, untwisted roving 3a, fiberglass mesh pad 3b, spacer 31, attachment part 32, and slot 33.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] This invention provides a main beam that can be used in the blades of a wind turbine. Figures 1 to 3 Various embodiments of the main beam provided by this utility model are shown.

[0024] Please see Figures 1 to 3 In some embodiments, the main beam 100 includes pultruded plates 1, interlayer fabric 2, and flow guiding medium 3. Multiple pultruded plates 1 are stacked along the thickness direction of the pultruded plates 1 and spliced ​​in a direction perpendicular to the thickness direction of the pultruded plates 1. Interlayer fabric 2 is provided at intervals between two adjacent pultruded plates 1 in the stacking direction. Flow guiding medium 3 is provided at intervals between two adjacent pultruded plates 1 in the splicing direction. Flow guiding medium 3 is used to guide the injection adhesive from one side of the pultruded plate 1 in the stacking direction to the other side of the pultruded plate 1 in the stacking direction.

[0025] Specifically, the main beam 100 can be fabricated using the VARTM (Vacuum Assisted Resin Transfer Molding) process. The pultruded plate 1 is the main component of the main beam 100. Multiple pultruded plates 1 are first stacked along their thickness direction, and then these stacks are spliced ​​together in a direction perpendicular to the thickness direction of the pultruded plates 1. Hereinafter, the stacking direction of the pultruded plates 1 is defined as longitudinal, and the splicing direction is defined as transverse. After multiple pultruded plates 1 are spliced ​​transversely and stacked longitudinally, an adhesive is impregnated into the splice seams and interlayers of the pultruded plates 1 through vacuum infusion. After curing at a temperature, a main beam structure conforming to the required dimensions of the blade is formed. The pultruded plate 1 is typically a carbon fiber pultruded plate or a glass fiber pultruded plate, and the infusion adhesive can be resin, etc. The following description will use resin as an example of infusion adhesive.

[0026] An interlayer fabric 2 is disposed between two stacked pultruded plates 1. The interlayer fabric 2 is typically made of glass fiber fabric, for example, it can be a biaxial glass fiber fabric. The interlayer fabric 2 is laid between the layers of the pultruded plates 1, and its main function is to form resin channels between the layers of the pultruded plates 1 to enhance the interlayer bonding strength. The transverse dimension of the interlayer fabric 2 can be greater than, less than, or equal to the transverse dimension of the pultruded plates 1. Optionally, please refer to... Figures 1 to 3 In some embodiments, the distance by which the two ends of the interlayer fabric 2 extend beyond the pultrusion plate 1 in the transverse direction is 0mm to 5mm.

[0027] A flow guiding medium 3 is provided between the two spliced ​​pultruded plates 1. The flow guiding medium 3 has good wettability to the resin. The main function of the flow guiding medium 3 is to control and fill the gap between the two spliced ​​pultruded plates 1, provide a flow channel for the resin, and reduce the inter-plate injection resistance. In this way, the main beam 100 is provided with a flow guiding structure for optimized injection of stacked pultruded plates 1. During the blade manufacturing process, it can improve the resin penetration efficiency in the thick laminated area of ​​the main beam 100, reduce the semi-dry yarn defects between layers, and shorten the injection time.

[0028] The main beam 100 of this utility model adds a flow guiding medium 3 between the two spliced ​​pultruded plates 1. The flow guiding medium 3 can effectively control the gap between the two pultruded plates 1 and reduce the injection resistance between them. This not only fundamentally solves the problem of semi-dry yarn defects between layers, but also effectively wets the interlayer fabric 2 on the pultruded plate 1, improves the penetration efficiency of the injection adhesive in the main beam 100, thereby improving the injection efficiency and shortening the injection time.

[0029] The flow guiding medium 3 is disposed between two spliced ​​pultruded plates 1. The flow guiding medium 3 can be clamped and fixed by the two spliced ​​pultruded plates 1; the flow guiding medium 3 can also be bonded and fixed to the pultruded plate 1. For example, the flow guiding medium 3 can be bonded and fixed to the side of the pultruded plate 1 using high-temperature resistant fiberglass tape, epoxy adhesive or other bonding methods.

[0030] One or more flow guiding media 3 may be provided between two pultruded plates 1 that are spliced ​​together. Optionally, in some embodiments, between two adjacent pultruded plates 1 in the splicing direction, multiple flow guiding media 3 are provided at intervals along a direction perpendicular to the stacking direction and the splicing direction.

[0031] Specifically, the pultruded plate 1 is usually square in shape. The thickness direction of the pultruded plate 1 is longitudinal, the width direction of the pultruded plate 1 is transverse, and the length direction of the pultruded plate 1 is vertical. Multiple flow guiding media 3 are arranged at intervals along the length direction of the pultruded plate 1 between two spliced ​​pultruded plates 1.

[0032] Optionally, in some embodiments, the flow guiding medium 3 is arranged between two adjacent pultruded plates 1 in the splicing direction, extending in a direction perpendicular to the stacking direction and the splicing direction.

[0033] Specifically, the flow guiding medium 3 extends along the length of the pultruded plate 1, and a flow guiding medium 3 is provided between two spliced ​​pultruded plates 1. The length of the flow guiding medium 3 can be slightly greater than, equal to or slightly less than the length of the pultruded plate 1.

[0034] Further, please refer to Figures 1 to 3 In some embodiments, the flow guiding medium 3 covers one end of the pultruded plate 1 in the splicing direction.

[0035] Specifically, the length of the flow guiding medium 3 is not less than the length of the pultruded plate 1, and the longitudinal dimension of the flow guiding medium 3 is not less than the thickness of the pultruded plate 1, so that the flow guiding medium 3 can completely cover the lateral side of the pultruded plate 1.

[0036] The transverse dimension of the flow guiding medium 3 is its thickness. The thickness of the flow guiding medium 3 can be set according to actual conditions. Optionally, please refer to [link to relevant documentation]. Figures 1 to 3 In some embodiments, the spacing between two adjacent pultruded plates 1 in the splicing direction is 0.5mm to 2mm.

[0037] Specifically, the thickness of the flow guiding medium 3 is 0.5mm to 2mm. For example, the thickness of the flow guiding medium 3 can be 1mm. In this way, the gap between the two spliced ​​pultruded plates 1 can be adjusted to 0.5mm to 2mm through the flow guiding medium 3.

[0038] A flow guiding medium 3 or multiple flow guiding media 3 arranged longitudinally can be provided between two adjacent pultruded plates 1. Optionally, in some embodiments, multiple flow guiding media 3 arranged along the stacking direction are sequentially connected between two adjacent pultruded plates 1.

[0039] Specifically, the number of flow guiding media 3 between two adjacent pultruded plates 1 is the same as the number of pultruded plates 1 contained in each pultruded plate pile 1. Thus, between two adjacent pultruded plates 1, each pair of pultruded plates 1 is provided with a flow guiding medium 3. Multiple flow guiding media 3 located between two adjacent pultruded plates 1 can be arranged at longitudinal intervals; multiple flow guiding media 3 located between two adjacent pultruded plates 1 can also be connected sequentially.

[0040] Optionally, please refer to Figures 1 to 3 In some embodiments, the dimension of the flow guiding medium 3 in the stacking direction is not less than the dimension of the splice of each pultruded plate 1 in the stacking direction.

[0041] Specifically, a flow guiding medium 3 is provided between two adjacent pultruded plates 1, and the longitudinal dimension of the flow guiding medium 3 is greater than or equal to the thickness of each pultruded plate 1.

[0042] The pultruded plate 1 has a splicing end 11 that is spliced ​​with another pultruded plate 1. The flow guiding medium 3 may only cover the end face of the splicing end 11; or the flow guiding medium 3 may simultaneously cover the end face of the splicing end 11 and at least one of the two opposite sides in the thickness direction of the pultruded plate 1.

[0043] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, the splicing end 11 is provided with two chamfered edges 12 opposite to each other in the stacking direction, and the flow guiding medium 3 includes a spacer 31, which is attached to the end face of the splicing end 11.

[0044] Specifically, the flow guiding medium 3 may consist only of the spacer 31, and the flow guiding medium 3 may cover the end face of the splicing end 11 through the spacer 31.

[0045] Further, please refer to Figure 3 In some embodiments, the guiding medium 3 further includes an attachment portion 32 connected to the spacer portion 31, the attachment portion 32 being attached to the chamfered edge 12.

[0046] Specifically, the flow guiding medium 3 includes a connected spacer 31 and an attachment 32, and the flow guiding medium 3 can cover the end face of the splicing end 11 and the chamfered edge 12 through the spacer 31 and the attachment 32 respectively.

[0047] The flow guiding medium 3 is typically flexible, and its material is usually the same as that of the pultruded plate 1. Since the pultruded plate 1 is typically made of glass fiber or carbon fiber, the flow guiding medium 3 is typically made of glass fiber or carbon fiber. Optionally, please refer to... Figure 1 In some embodiments, the guiding medium 3 is untwisted roving 3a.

[0048] Specifically, untwisted roving 3a is an untwisted continuous filament bundle, commonly used as a reinforcing layer in composite materials or for infusing flow media. Adding untwisted roving 3a to the side of the pultrusion plate 1 adjusts the spacing between the two joined pultrusion plates 1, providing a flow channel for the resin. The untwisted roving 3a, composed of parallel monofilaments, can accelerate resin flow between the seams of the two joined pultrusion plates 1.

[0049] During the manufacturing process of pultruded plate 1, two strands of untwisted roving 3a (the number of strands of untwisted roving 3a can be adjusted according to actual conditions) are fixed to one side of pultruded plate 1 using a specific tape / adhesive to form a longitudinal continuous flow channel, which serves as an "internal resin fast channel" during injection; it works in conjunction with other auxiliary materials to accelerate the overall impregnation speed and reduce defects such as poor impregnation of semi-dry yarn.

[0050] Optionally, please refer to Figure 2 and Figure 3 In some embodiments, the flow guiding medium 3 is a fiberglass mesh pad 3b.

[0051] Specifically, the fiberglass mesh pad 3b is made of flexible fiberglass material. The fiberglass mesh pad 3b can increase the flow rate through the gaps in the pultruded plate 1 joints. For example, when the thickness of the fiberglass mesh pad 3b is approximately 1 mm and the mesh density is 5 mm × 5 mm, it can significantly improve the flow rate. Adding the fiberglass mesh pad 3b to the side of the pultruded plate 1 adjusts the spacing between the two joined pultruded plates 1, providing a flow channel for the resin.

[0052] The fiberglass mesh mat 3b can be installed in two ways: Option 1, please refer to... Figure 2 Insert the fiberglass mesh pad 3b vertically into the seam between the pultruded plates 1 to control the splice distance of the pultruded plates 1; Scheme 2, please refer to Figure 3 First, a fiberglass mesh pad 3b that matches the shape of the splicing end 11 of the pultruded plate 1 is prefabricated. One spacer 31 of the fiberglass mesh pad 3b is connected to two attachment parts 32 to form a groove 33 that matches the shape of the splicing end 11. The fiberglass mesh pad 3b is then attached to the chamfered edge 12 of the pultruded plate 1, and the splicing end 11 and the groove 33 form a snap-fit ​​fit. This can enhance the uniformity of flow at the edge of the pultruded plate 1.

[0053] This utility model also provides a blade, which includes a main beam. Since the main beam adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0054] This utility model also provides a wind turbine generator, which includes blades and a main beam. Since the main beam adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0055] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A main beam, characterized in that, include: Pultruded plates, wherein a plurality of said pultruded plates are stacked along the thickness direction of said pultruded plates and are spliced ​​together in a direction perpendicular to the thickness direction of said pultruded plates; Interlayer fabric, wherein the interlayer fabric is provided at intervals between two adjacent pultruded plates in the stacking direction; A flow guiding medium is provided at intervals between two adjacent pultruded plates in the splicing direction. The flow guiding medium is used to guide the infused adhesive from one side of the pultruded plate in the stacking direction to the other side of the pultruded plate in the stacking direction.

2. The girder of claim 1, wherein Between two adjacent pultruded plates in the splicing direction, the flow guiding medium extends in a direction perpendicular to the stacking direction and the splicing direction; or... Between two adjacent pultruded plates in the splicing direction, a plurality of flow guiding media are provided at intervals along a direction perpendicular to the stacking direction and the splicing direction.

3. The main beam according to claim 2, characterized in that, The guiding medium covers one end of the pultruded plate in the splicing direction.

4. The girder of claim 1, wherein The dimension of the guiding medium in the stacking direction is not less than the dimension of the joint of each stack of pultruded plates in the stacking direction; or, Between two adjacent stacks of pultruded plates, a plurality of flow guiding media arranged along the stacking direction are sequentially connected.

5. The main beam according to claim 1, characterized in that, The pultruded plate has a splicing end that is joined to another pultruded plate. The splicing end is provided with two chamfered edges opposite each other in the stacking direction. The flow guiding medium includes a spacer portion that is attached to the end face of the splicing end.

6. The girder of claim 5, wherein, The flow guiding medium also includes an attachment portion connected to the spacer portion, the attachment portion being attached to the chamfered edge.

7. A girder according to any one of claims 1 to 6, characterised in that The spacing between two adjacent pultruded plates in the splicing direction is 0.5mm to 2mm.

8. A girder according to any one of claims 1 to 6, characterised in that The flow guiding medium is made of glass fiber or carbon fiber.

9. A blade, characterized in that Includes the main beam as described in any one of claims 1-8.

10. A wind power generator, characterized by Includes the blade as described in claim 9.

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