A main spar structure, a method of forming, a wind turbine blade and a wind turbine generator system

Abstract

The application relates to the technical field of wind power equipment, in particular to a main beam structure, a forming method, a wind power blade and a wind turbine generator set. The main beam structure provided by the application comprises a main beam body comprising a plurality of stacked pultrusion plates; a flow guide assembly comprising a first flow guide part extending along a width direction and a plurality of second flow guide parts extending along a thickness direction, the plurality of second flow guide parts are at least partially distributed along the width direction, and the first flow guide part is connected with the second flow guide part; wherein at least part of the number of the first flow guide parts are located between the pultrusion plates arranged adjacently along the thickness direction, and at least part of the number of the second flow guide parts are located between the pultrusion plates arranged adjacently along the width direction, so that at least part of the flow guide assembly is embedded in the accommodation part of the pultrusion plate, the plurality of pultrusion plates are connected in equipotential, and the lightning protection effect is improved. Meanwhile, the pultrusion plates are prevented from being stacked and separated, and the probability of defects of the main beam structure is reduced.

Description

Technical Field

[0001] This application relates to the field of wind power equipment technology, and in particular to a main beam structure, forming method, wind turbine blades, and wind turbine generator set. Background Technology

[0002] In wind turbine blade lightning protection systems, especially those with carbon fiber main beams, electromagnetic induction can easily cause charge to form within the carbon fiber main beam when the lightning protection system conducts current. This can lead to discharge between the main beam and the lightning protection system, resulting in damage to the main beam. Therefore, it is usually necessary to install a conductive structure within the main beam to provide equipotential bonding and prevent damage.

[0003] In related technologies, carbon-glass hybrid fabrics are typically used to achieve equipotential bonding between the pultruded plates of the main beam. However, carbon-glass hybrid fabrics have poor conductivity, resulting in poor lightning protection. Therefore, a new main beam structure is urgently needed. Summary of the Invention

[0004] This application provides a main beam structure, a forming method, wind turbine blades, and a wind turbine generator set. The main beam structure has good lightning protection performance and can reduce the probability of defects in the main beam structure.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] In a first aspect, this application provides a main beam structure, comprising: a main beam body including a plurality of pultruded plates, the plurality of pultruded plates being stacked along the thickness direction and the width direction of the main beam body; a flow guiding assembly disposed on the main beam body, the flow guiding assembly including a first flow guiding portion and a plurality of second flow guiding portions, the first flow guiding portion extending along the width direction, the second flow guiding portions extending along the thickness direction, the plurality of second flow guiding portions being at least partially distributed at intervals along the width direction, the first flow guiding portion and the second flow guiding portion being connected; wherein, at least a portion of the first flow guiding portions are located between adjacent pultruded plates arranged along the thickness direction, and at least a portion of the second flow guiding portions are located between adjacent pultruded plates arranged along the width direction, so as to equipotentially connect the plurality of pultruded plates, and a recessed relief portion is provided on the pultruded plate, at least a portion of the flow guiding assembly being embedded in the relief portion.

[0007] In one possible implementation, the main beam structure provided in this application has a flow guiding component that extends a predetermined length along the length direction of the main beam body itself; the flow guiding component is configured as a plurality of components, at least a portion of which are arranged sequentially along a predetermined distance in the length direction, and at least a portion of which are staggered in the thickness direction.

[0008] In one possible implementation, the main beam structure provided in this application has each second guide portion spaced apart from the first guide portion along the width direction, and a receiving area is formed between each two adjacent second guide portions and the first guide portion, the receiving area being used to receive the pultruded plate.

[0009] In one possible implementation, the main beam structure provided in this application includes a first relief groove in the relief portion. The first relief groove is recessed inward from one side surface of the pultruded plate in the thickness direction, and a first guide portion is at least partially embedded in the first relief groove.

[0010] In one possible implementation, the main beam structure provided in this application has two adjacent pultruded plates fitted together along the thickness direction and connected to each other by a first relief groove. The sum of the groove depths of the first relief grooves of the two adjacent pultruded plates is greater than or equal to the thickness of the first guide portion in the thickness direction. At least a portion of the first guide portion is embedded in the first relief groove of the two adjacent pultruded plates.

[0011] In one possible implementation, the main beam structure provided in this application includes a second relief groove in the relief portion. The second relief groove is recessed inward from one side surface of the pultruded plate in the width direction, and the second guide portion is at least partially embedded in the second relief groove.

[0012] In one possible implementation, the main beam structure provided in this application has two adjacent pultruded plates fitted together along the width direction and connected to each other by their second relief grooves. The sum of the groove depths of the second relief grooves of the two adjacent pultruded plates is greater than or equal to the thickness of the second guide portion in the width direction. At least a portion of the second guide portion is embedded in the second relief grooves of the two adjacent pultruded plates.

[0013] In one possible implementation, the main beam structure provided in this application has, along the width direction, at least one of the outermost pultruded plates in each pultruded plate with a second relief groove having a groove depth equal to the thickness of the second guide portion, the second guide portion being embedded in the second relief groove and flush with the end face of the pultruded plate in the width direction.

[0014] In one possible implementation, the main beam structure provided in this application has a first surface and a second surface disposed opposite to each other along the thickness direction, and at least a portion of the first surface and at least a portion of the second surface are provided with a reinforcing layer.

[0015] Secondly, this application provides a method for forming a main beam structure, applied to the aforementioned main beam structure, comprising:

[0016] A three-dimensional model of the main beam structure is obtained based on the blade shell structure of the wind turbine blade;

[0017] Obtain target data for pultruded plates based on 3D models;

[0018] The number of flow guiding components and their installation positions on multiple pultruded plates are determined based on the target data.

[0019] A clearance portion is made on the corresponding pultruded plate according to the installation location;

[0020] Pultruded plates are stacked and flow guiding components are installed, such that at least a portion of the first flow guiding portions are located between adjacent pultruded plates arranged in the thickness direction, and at least a portion of the second flow guiding portions are located between adjacent pultruded plates arranged in the width direction, so that at least a portion of the flow guiding components is embedded in the relief portion.

[0021] In one possible implementation, the forming method provided in this application includes at least one of the following: the angle between the pultruded plate and the horizontal plane, the angle difference between two adjacent pultruded plates and the horizontal plane, and the pre-bending rate of the pultruded plate.

[0022] Thirdly, this application provides a wind turbine blade, including a blade shell and the aforementioned main beam structure, wherein the main beam structure is disposed on the blade shell.

[0023] Fourthly, this application provides a wind turbine generator set, including the aforementioned wind turbine blades.

[0024] The main beam structure, forming method, wind turbine blade, and wind turbine generator provided in this application include a main beam body and a flow guiding assembly. The main beam body includes multiple stacked pultruded plates. The flow guiding assembly includes a first flow guiding portion extending along the width direction of the main beam body and a second flow guiding portion extending along the thickness direction. At least a portion of the second flow guiding portions are spaced apart along the width direction. The first and second flow guiding portions are connected to allow current to be conducted within the flow guiding assembly. At least a portion of the first flow guiding portions are located between adjacent pultruded plates along the thickness direction, and at least a portion of the second flow guiding portions are located between adjacent pultruded plates along the width direction. Current can be conducted along the width and thickness directions within the main beam body, resulting in equipotential bonding between the multiple pultruded plates, thereby improving lightning protection. Recessed clearance portions are provided on the pultruded plates, and at least a portion of the flow guiding assembly is embedded in these clearance portions, preventing stacking and separation gaps between the pultruded plates and reducing the probability of defects in the main beam structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the main beam structure provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 Schematic diagram of the middle flow guide component;

[0028] Figure 3 for Figure 1 A schematic diagram of the decomposed structure;

[0029] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0030] Figure 5 A schematic diagram of the connection between the main beam structure and the blade shell provided in the embodiments of this application. Figure 1 ;

[0031] Figure 6 A schematic diagram of the connection between the main beam structure and the blade shell provided in the embodiments of this application. Figure 2 ;

[0032] Figure 7 This is a schematic diagram of the structure of a wind turbine blade provided in an embodiment of this application;

[0033] Figure 8 This is a schematic flowchart of the molding method provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Wind turbine blade;

[0036] 10-Main beam structure;

[0037] 100 - Main beam body;

[0038] 110 - Pultruded plate; 111 - Relief section; 1111 - First relief groove; 1112 - Second relief groove;

[0039] 120 - First surface;

[0040] 130 - Second surface;

[0041] 200-Flow guiding component;

[0042] 210 - First guide section;

[0043] 220 - Second guide section;

[0044] 230 - Accommodation area;

[0045] 20 - Blade shell;

[0046] X - Thickness direction; Y - Width direction; Z - Length direction.

[0047] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the preferred embodiments of this application will be described in more detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0049] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0050] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," 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 mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In wind turbine blade lightning protection systems, especially those with carbon fiber main beams, electromagnetic induction can easily cause charge to form within the carbon fiber main beam when the lightning protection system conducts current. This can lead to discharge between the main beam and the lightning protection system, resulting in damage to the main beam. Therefore, it is usually necessary to install a conductive structure within the main beam to provide equipotential bonding and prevent damage.

[0053] In related technologies, carbon-glass hybrid fabrics are typically used to achieve equipotential bonding between the pultruded plates of the main beam. However, carbon-glass hybrid fabrics have poor conductivity, resulting in poor lightning protection. Therefore, a new main beam structure is urgently needed.

[0054] In view of this, the main beam structure, forming method, wind turbine blade, and wind turbine generator provided in this application include a main beam body and a flow guiding assembly. The main beam body includes multiple stacked pultruded plates. The flow guiding assembly includes a first flow guiding portion extending along the width direction of the main beam body and a second flow guiding portion extending along the thickness direction. The multiple second flow guiding portions are at least partially distributed at intervals along the width direction. The first flow guiding portions are connected to the second flow guiding portions so that current can be conducted within the flow guiding assembly. At least a portion of the first flow guiding portions are located between adjacent pultruded plates arranged along the thickness direction, and at least a portion of the second flow guiding portions are located between adjacent pultruded plates arranged along the width direction. Current can be conducted within the main beam body along the width and thickness directions, making the multiple pultruded plates equipotentially connected, thereby improving the lightning protection effect. The pultruded plates are recessed with clearance portions, and at least a portion of the flow guiding assembly is embedded in the clearance portions, which can avoid stacking and separation gaps between the pultruded plates and reduce the probability of defects in the main beam structure.

[0055] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0056] See Figures 1 to 6 This application provides a main beam structure 10, including a main beam body 100 and a flow guiding assembly 200. The main beam body 100 may include multiple pultruded plates 110, which are stacked along both the thickness direction X and the width direction Y of the main beam body 100. The flow guiding assembly 200 is disposed on the main beam body 100 and may include a first flow guiding portion 210 and multiple second flow guiding portions 220. The first flow guiding portion 210 extends along the width direction Y, and the second flow guiding portions 220 extend along the thickness direction X. The multiple second flow guiding portions 220 are at least partially distributed at intervals along the width direction Y, and the first flow guiding portion 210 is connected to the second flow guiding portions 220.

[0057] At least a number of first flow guides 210 are located between adjacent pultruded plates 110 arranged along the thickness direction X, and at least a number of second flow guides 220 are located between adjacent pultruded plates 110 arranged along the width direction Y, so as to connect the plurality of pultruded plates 110 at the same potential. A relief portion 111 is recessed on the pultruded plate 110, and at least a portion of the flow guide assembly 200 is embedded in the relief portion 111.

[0058] It is understood that multiple pultruded plates 110 are stacked layer by layer in the thickness direction X of the main beam body 100, and simultaneously stacked in an orderly manner in the width direction Y, thereby giving the main beam structure 10 high structural strength and stability. Optionally, the pultruded plates 110 may include carbon fiber pultruded plates 110, which have the advantages of high strength and stiffness, and relatively light weight.

[0059] To achieve equipotential bonding between the pultruded plates 110 and improve the lightning protection effect of the main beam structure 10, the main beam structure 10 is provided with a flow guiding assembly 200, which may include a first flow guiding section 210 and multiple second flow guiding sections 220. The first flow guiding section 210 extends a predetermined length along the width direction Y of the main beam body 100. The length of the first flow guiding section 210 in the width direction Y of the main beam body 100 can be set to match the main beam body 100, with the aim of achieving equipotential bonding between the pultruded plates 110 in the width direction Y, thereby improving the flow guiding effect of the main beam structure 10. The multiple second flow guiding sections 220 extend along the thickness direction X of the main beam body 100 and are spaced apart in the width direction Y, with the aim of achieving equipotential bonding between the pultruded plates 110 in the thickness direction X.

[0060] The first guide section 210 and the second guide section 220 are connected, which not only enhances the guiding effect but also ensures the integrity of the guide assembly 200. Optionally, the first guide section 210 and the second guide section 220 can be integrally molded parts.

[0061] Furthermore, the first guide portion 210 and the second guide portion 220 can together constitute multiple split-type guide components, which may include I-shaped guide components, T-shaped guide components, Π-shaped guide components, and L-shaped guide components. Split-type guide components can also achieve equipotential bonding between the pultruded plates 110. In specific implementations, an integrally molded part composed of the first guide portion 210 and the second guide portion 220 can be used, or a combination of an integrally molded part and split-type guide components can be used; this application does not impose any limitations on this.

[0062] Optionally, the thickness of the first guide portion 210 and the thickness of the second guide portion 220 can be set between 0.5mm and 1.5mm, including the two extreme values ​​of 0.5mm and 1.5mm, with 1mm being a possible value. Thus, while ensuring the guiding effect of the guide assembly 200, it also gives the guide assembly 200 a certain degree of rigidity, achieving the effect of limiting the pultruded plate 110.

[0063] At least a portion of the first flow guides 210 are disposed between adjacent pultruded plates 110 along the thickness direction X, and at least a portion of the second flow guides 220 are located between adjacent pultruded plates 110 along the width direction Y. This arrangement makes full use of the space inside the main beam body 100, achieves equipotential bonding between multiple pultruded plates 110, and effectively improves the lightning protection effect of the main beam structure 10.

[0064] To further optimize the installation and fixation of the flow guiding component 200, a clearance portion 111 can be provided on the pultruded plate 110. This facilitates the embedding of the flow guiding component 200, allowing it to be securely installed inside the main beam body 100. For example, the first flow guiding portion 210 and the second flow guiding portion 220 can be plate-shaped and made of materials with a yield strength greater than or equal to 160 MPa, a tensile strength greater than or equal to 240 MPa, and a shear strength greater than or equal to 170 MPa, to effectively fiberize each pultruded plate 110, thereby effectively preventing stacking and separation gaps between the pultruded plates 110 and reducing the probability of defects in the main beam structure 10.

[0065] See Figure 1 and Figure 2 In some embodiments, the flow guiding component 200 extends a predetermined length along the length direction Z of the main beam body 100; the flow guiding component 200 is configured as a plurality of components, at least a portion of the flow guiding components 200 are arranged sequentially along the length direction Z at a predetermined distance, and at least a portion of the flow guiding components 200 are staggered in the thickness direction X.

[0066] Optionally, the first guide portion 210 and the second guide portion 220 can be made of carbon fiber composite material or metal material (such as copper, aluminum, stainless steel, etc.). When the first guide portion 210 and the second guide portion 220 are made of carbon fiber composite material, the dimensions of the first guide portion 210 and the second guide portion 220 in the Z-direction of the main beam body 100 can be set to be greater than or equal to 200 mm, thereby ensuring the guiding effect of the guide assembly 200. When the first guide portion 210 and the second guide portion 220 are made of metal material, the dimensions of the first guide portion 210 and the second guide portion 220 in the Z-direction of the main beam body 100 can be set to be greater than or equal to 100 mm, thereby ensuring the guiding effect of the guide assembly 200.

[0067] It should be noted that multiple flow guiding components 200 can be configured. At least a portion of the flow guiding components 200 are arranged sequentially at predetermined distances along the length direction Z. This helps to provide a balanced flow guiding effect at different locations on the pultruded plate 110. Optionally, the distance between two adjacent flow guiding components 200 along the length direction Z can be set between 15m and 20m, including both extreme values, with 15m being a possible choice.

[0068] Furthermore, to further improve the current guiding effect of the current guiding components 200, at least a portion of the current guiding components 200 may be staggered in the thickness direction X. This helps to further optimize the current conduction path and also enhances the structural strength of the main beam structure 10 to a certain extent.

[0069] See Figure 2 and Figure 3 In some embodiments, each second guide portion 220 is spaced apart from the first guide portion 210 along the width direction Y, and a receiving area 230 is formed between each two adjacent second guide portions 220 and the first guide portion 210, the receiving area 230 being used to receive the pultruded plate 110.

[0070] By arranging the second current guides 220 at intervals along the width direction Y within the first current guide 210, the current guide assembly 200 achieves current conduction and distribution. This arrangement not only optimizes the current path but also enhances the current carrying capacity of the main beam structure 10. The accommodating area 230 formed between each pair of adjacent second current guides 220 and the first current guide 210 provides a stable and efficient installation space for the pultruded plate 110.

[0071] This ensures that when the pultruded plate 110 is carrying current, the current can be smoothly transmitted between the pultruded plate 110 and the current guide part by means of the current guiding component 200, avoiding the occurrence of local current overload or concentration, and extending the service life of the pultruded plate 110 and the entire main beam structure 10.

[0072] See Figure 3 and Figure 4 In some embodiments, the clearance portion 111 includes a first clearance groove 1111, which is recessed inward from one side surface of the pultruded plate 110 in the thickness direction X, and the first guide portion 210 is at least partially embedded in the first clearance groove 1111.

[0073] By setting the first clearance groove 1111, the first flow guide 210 can be at least partially embedded in the first clearance groove 1111, achieving a tight fit and connection between the flow guide assembly 200 and the pultruded plate 110. This configuration enhances the overall integrity of the main beam structure 10 and improves the efficiency and stability of current conduction, thereby improving the lightning protection effect of the main beam structure 10.

[0074] Understandably, the design of the first clearance slot 1111 effectively utilizes the structural characteristics of the pultruded plate 110, avoiding the potential increase in volume and weight caused by adding additional flow guiding components 200. This not only simplifies the production process and reduces manufacturing costs, but also makes the entire main beam structure 10 more compact and lightweight while maintaining good lightning protection performance.

[0075] Optionally, the first clearance groove 1111 can be provided on one side of the pultruded plate 110 in the thickness direction X. The groove depth of the first clearance groove 1111 can be set to be greater than or equal to the thickness of the first guide portion 210, so that after the first guide portion 210 is embedded in the first clearance groove 1111, two adjacent pultruded plates 110 in the thickness direction X can be fitted together to improve the structural strength of the main beam body 100.

[0076] In some embodiments, along the thickness direction X, two adjacent pultruded plates 110 are fitted together and connected to each other by a first relief groove 1111. The sum of the groove depths of the first relief grooves 1111 of the two adjacent pultruded plates 110 is greater than or equal to the thickness of the first guide portion 210 in the thickness direction X. At least a portion of the first guide portion 210 is embedded in the first relief grooves 1111 of the two adjacent pultruded plates 110.

[0077] It is understandable that the first clearance groove 1111 can also be set on the side of two adjacent pultruded plates 110 facing each other in the thickness direction X. That is, both adjacent pultruded plates 110 are provided with the first clearance groove 1111, and the two first clearance grooves 1111 are set facing each other.

[0078] The first relief grooves 1111 of two adjacent pultruded plates 110 are connected, providing more flexible space for the installation of the first guide portion 210. By ensuring that the sum of the groove depths of the first relief grooves 1111 of two adjacent pultruded plates 110 is greater than or equal to the thickness of the first guide portion 210 in the thickness direction X, the first guide portion 210 can be at least partially embedded in these two connected first relief grooves 1111. This not only enhances the connection strength between the first guide portion 210 and the pultruded plate 110, but also makes the main beam structure 10 more compact in the thickness direction X.

[0079] Furthermore, the interconnected first clearance grooves 1111 of two adjacent pultruded plates 110 simplify the installation process. During assembly, there is no need for complex positioning and adjustment of the first guide section 210; it can simply be embedded into the interconnected first clearance grooves 1111. This not only improves installation efficiency but also reduces the risk of decreased flow guiding effect or safety hazards due to improper installation.

[0080] See Figure 3 and Figure 4 In some embodiments, the clearance portion 111 includes a second clearance groove 1112, which is recessed inward from one side surface of the pultruded plate 110 in the width direction Y, and the second guide portion 220 is at least partially embedded in the second clearance groove 1112.

[0081] The cooperation between the second clearance groove 1112 and the second flow guide 220 enhances the stability and reliability of the structure. When the second flow guide 220 is embedded in the second clearance groove 1112, a tight contact is formed between the second flow guide 220 and the second clearance groove 1112, which helps to improve the flow guiding effect of the second flow guide 220.

[0082] Furthermore, the design of the second clearance groove 1112 simplifies the installation process and improves work efficiency. When installing the flow guiding component 200, simply align the second flow guiding part 220 with the second clearance groove 1112 and embed it therein to achieve quick and accurate installation. This design not only reduces installation time and cost but also lowers the risk of reduced flow guiding effect or safety hazards due to improper installation.

[0083] In some embodiments, along the width direction Y, two adjacent pultruded plates 110 are fitted together and connected to each other by a second relief groove 1112. The sum of the groove depths of the second relief grooves 1112 of the two adjacent pultruded plates 110 is greater than or equal to the thickness of the second guide portion 220 in the width direction Y. At least a portion of the second guide portion 220 is embedded in the second relief grooves 1112 of the two adjacent pultruded plates 110.

[0084] It is understandable that the second clearance groove 1112 can also be set on the side of two adjacent pultruded plates 110 facing each other in the width direction Y. That is, both adjacent pultruded plates 110 are provided with the second clearance groove 1112, and the two second clearance grooves 1112 are set facing each other.

[0085] The second relief grooves 1112 of two adjacent pultruded plates 110 are connected, providing more flexible space for the installation of the second guide portion 220. By ensuring that the sum of the groove depths of the second relief grooves 1112 of two adjacent pultruded plates 110 is greater than or equal to the thickness of the second guide portion 220 in the width direction Y, the second guide portion 220 can be at least partially embedded in these two connected second relief grooves 1112. This not only enhances the connection strength between the second guide portion 220 and the pultruded plate 110, but also makes the main beam structure 10 more compact in the thickness direction X.

[0086] Furthermore, the second clearance grooves 1112 of two adjacent pultruded plates 110 are connected, which simplifies the installation process between the two adjacent pultruded plates 110. During assembly, there is no need for complex positioning and adjustment of the second guide portion 220; the second guide portion 220 can simply be embedded into the connected second clearance grooves 1112, thereby achieving alignment and connection between the two adjacent pultruded plates 110.

[0087] In some embodiments, along the width direction Y, the groove depth of the second relief groove 1112 of at least one of the outermost pultruded plates 110 is equal to the thickness of the second guide portion 220. The second guide portion 220 is embedded in the second relief groove 1112 and is flush with the end face of the pultruded plate 110 in the width direction Y.

[0088] This design ensures proper connection between the second guide section 220 and the outer pultruded plate 110, achieving not only a neat and uniform appearance but also enhancing the overall stability and reliability of the structure. Since the second guide section 220 is flush with the end face of the pultruded plate 110, stress concentration can be effectively avoided.

[0089] In some embodiments, along the thickness direction X, the main beam body 100 has a first surface 120 and a second surface 130 disposed opposite to each other, and at least a portion of the first surface 120 and at least a portion of the second surface 130 are provided with a reinforcing layer.

[0090] Understandably, the addition of a reinforcing layer can significantly improve the structural strength and load-bearing capacity of the main beam 100. As an additional supporting structure, the reinforcing layer effectively disperses and resists external forces, thereby extending the service life of the main beam 100 and reducing the risk of deformation or damage caused by long-term stress.

[0091] Furthermore, the stress distribution of the main beam body 100 is optimized by setting a reinforcing layer. By setting a reinforcing layer on the first surface 120 and the second surface 130 in the area corresponding to the relief portion 111 within the main beam body 100, the strength of these weak areas can be specifically enhanced, ensuring the stability and safety of the overall structure of the main beam body 100.

[0092] Optionally, the reinforcing layer may include a fiber cloth, applied to at least a portion of the first surface 120 and the second surface 130.

[0093] See Figures 5 to 8 Based on the above embodiments, this application provides a method for forming a main beam structure 10, applicable to the main beam structure 10 provided in any of the above embodiments, including:

[0094] S101, Obtain the three-dimensional model of the main beam structure 10 based on the structure of the blade shell 20 of the wind turbine blade 1.

[0095] In practical implementation, the blade outer shell 20 of the wind turbine blade 1 has geometric features such as airfoil profile, pre-bending, and cross-sectional torsion angle. Figure 7 This can be understood as a pre-bending diagram of the wind turbine blade 1 along its own length direction Z. When the main beam structure 10 is placed into the blade mold, the pre-bending change of the main beam structure 10, the change of the cross-sectional curvature, and the dimensions of the pultruded plate 110 of the main beam structure 10 all affect the conformal placement of the pultruded plate 110. Due to the superposition of the geometric features of the blade shell 20 and the structural features of the main beam structure 10, there may be stacking, separation gaps, etc. between adjacent pultruded plates 110. Therefore, before placing the main beam structure 10, the three-dimensional model state of the main beam structure 10 can be analyzed and simulated based on the structure of the blade shell 20 to simulate the state of the main beam structure 10 when placed on the blade shell 20.

[0096] S102, Obtain target data for pultruded plate 110 based on the 3D model.

[0097] By obtaining the three-dimensional model of the main beam structure 10, the stacking state between the pultruded plates 110 can be further obtained, thereby obtaining the target data of the pultruded plates 110.

[0098] S103, determine the number of flow guiding components 200 and their installation positions on multiple pultruded plates 110 based on the target data.

[0099] Since the blade shell 20 is usually an irregular curved surface, when placing the main beam structure 10, there may be stacking or separation gaps between adjacent pultruded plates 110. At this time, it is necessary to restrict the relative position between the pultruded plates 110 so that the pultruded plates 110 can be placed in close fit in the blade mold and to avoid stacking or separation gaps between adjacent pultruded plates 110. Therefore, the number and installation position of the flow guiding components 200 can be determined according to the target data of the pultruded plates 110. A clearance portion 111 is opened at the installation position to restrict the relative position between the pultruded plates 110 through the flow guiding components 200.

[0100] S104, a clearance portion 111 is provided on the corresponding pultruded plate 110 according to the installation position.

[0101] S105, the pultruded plates 110 are stacked and the flow guiding assembly 200 is installed, such that at least a portion of the first flow guiding portions 210 are located between adjacent pultruded plates 110 arranged in the thickness direction X, and at least a portion of the second flow guiding portions 220 are located between adjacent pultruded plates 110 arranged in the width direction Y, so that at least a portion of the flow guiding assembly 200 is embedded in the clearance portion 111.

[0102] In a specific implementation, a pultruded plate 110 is first laid on the blade mold along the thickness direction X, and then the flow guiding component 200 is correspondingly embedded in the relief portion 111. The pultruded plates 110 are stacked in this manner, and then the pultruded plates 110 and the blade shell 20 are integrally cast and molded. Alternatively, the pultruded plates 110 and the flow guiding component 200 can be connected and cast and molded outside the blade mold first, and then the cast and molded main beam structure 10 is placed inside the blade mold. This application does not impose any limitations on this.

[0103] In some embodiments, the target data includes at least one of the following: the angle between the pultruded plate 110 and the horizontal plane, the angle difference between two adjacent pultruded plates 110 and the horizontal plane, and the pre-bending rate of the pultruded plate 110.

[0104] It should be noted that the spacing between two adjacent flow guiding components 200 along the length of the pultruded plate 110 can be set between 15m and 20m to reduce the potential difference between adjacent pultruded plates 110. After obtaining the target data, if the angle between the pultruded plate 110 and the horizontal plane is greater than 10°, a clearance portion 111 can be added to the corresponding pultruded plate 110 every 3m-5m to correspondingly add flow guiding components 200, thereby improving the limiting effect of the flow guiding components 200 on the pultruded plate 110. If the angle difference between two adjacent pultruded plates 110 and the horizontal plane is greater than 10°, a clearance portion 111 can also be added to the corresponding pultruded plate 110 every 3m-5m to correspondingly add flow guiding components 200. If the pre-bending change rate of the pultruded plate 110 is greater than 0.05, a clearance portion 111 can also be added to the corresponding pultruded plate 110 every 3m-5m to correspondingly add flow guiding components 200. Therefore, while ensuring the equipotential bonding effect between the pultruded plates 110, the probability of stacking or separation gaps between the pultruded plates 110 can also be reduced.

[0105] See Figure 7 Based on the above embodiments, this application provides a wind turbine blade 1, including a blade shell 20 and a main beam structure 10 provided in any of the above embodiments, wherein the main beam structure 10 is disposed on the blade shell 20.

[0106] The main beam structure 10 has been described in detail in the above embodiments and will not be repeated here. By adopting the main beam structure 10 provided in this application, the lightning protection effect of the wind turbine blade 1 can be improved, thereby enhancing the operational safety of the wind turbine blade 1.

[0107] Based on the above embodiments, this application provides a wind turbine generator set, including the wind turbine blade 1 provided in any of the above embodiments.

[0108] The wind turbine blade 1 has been described in detail in the above embodiments and will not be repeated here.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application.

Claims

1. A girder structure, characterized by, The utility model relates to a kind of main girder body (100), including a plurality of pultrusion plates (110), a plurality of the pultrusion plates (110) are stacked along the thickness direction (X) of the main girder body (100) And width direction (Y) are stacked; Flow guide assembly (200) is arranged in the main girder body (100), the flow guide assembly (200) includes first flow guide part (210) and a plurality of second flow guide part (220), the first flow guide part (210) extends along the width direction (Y), the second flow guide part (220) extends along the thickness direction (X), a plurality of the second flow guide part (220) is at least partially spaced along the width direction (Y) Distribution, the first flow guide part (210) is connected with the second flow guide part (220), the thickness of the first flow guide part (210) itself and the thickness of the second flow guide part (220) itself are set as 0.5mm to 1.5mm; Wherein, at least part quantity of the first flow guide part (210) is located between the pultrusion plate (110) adjacent arrangement along the thickness direction (X), at least part quantity of the second flow guide part (220) is located between the pultrusion plate (110) adjacent arrangement along the width direction (Y), to connect a plurality of the pultrusion plate (110) equipotential, recess is provided with the pultrusion plate (110) on the pultrusion plate (110) Let part (111), at least part of the flow guide assembly (200) is embedded in the let part (111), the let part (111) includes first let slot (1111), the first let slot (1111) is recessed by the pultrusion plate (110) in the thickness direction (X) One side surface starts to the interior, the first flow guide part (210) is at least partially embedded in the first let slot (1111). The flow guide assembly (200) extends along the length direction (Z) of the main girder body (100) predetermined length; 2. The girder structure according to claim 1, characterized in that The flow guide assembly (200) is set as a plurality of, at least part quantity of the flow guide assembly (200) in a plurality of the flow guide assembly (200) is sequentially arranged in the length direction (Z) along predetermined distance, and at least part quantity of the flow guide assembly (200) in a plurality of the flow guide assembly (200) is staggered in the thickness direction (X). Each second flow guide part (220) is spaced apart in the first flow guide part (210) along the width direction (Y), and the accommodating area (230) is formed around each adjacent two second flow guide parts (220) and the first flow guide part (210), and the accommodating area (230) is used to accommodate the pultrusion plate (110).

3. The girder structure of claim 1, wherein ​ 4. The girder structure of claim 1, wherein Along the thickness direction (X), two adjacent pultrusion plates (110) are arranged in abutment and the first displacement slots (1111) of the two adjacent pultrusion plates (110) are in communication with each other, and the sum of the groove depths of the first displacement slots (1111) of the two adjacent pultrusion plates (110) is greater than or equal to the thickness value of the first flow guide portion (210) in the thickness direction (X), and at least part of the first flow guide portion (210) is embedded in the first displacement slots (1111) of the two adjacent pultrusion plates (110).

5. The girder structure according to any one of claims 1 to 4, characterized in that, The displacement portion (111) comprises a second displacement slot (1112), which is recessed inwardly from one side surface of the pultrusion plate (110) in the width direction (Y), and the second flow guide portion (220) is at least partially embedded in the second displacement slot (1112).

6. The girder structure of claim 5, wherein Along the width direction (Y), two adjacent pultrusion plates (110) are arranged in abutment and the second displacement slots (1112) of the two adjacent pultrusion plates (110) are in communication with each other, and the sum of the groove depths of the second displacement slots (1112) of the two adjacent pultrusion plates (110) is greater than or equal to the thickness value of the second flow guide portion (220) in the width direction (Y), and at least part of the second flow guide portion (220) is embedded in the second displacement slots (1112) of the two adjacent pultrusion plates (110).

7. The girder structure of claim 5, wherein Along the width direction (Y), the groove depth of the second displacement slot (1112) of at least one of the pultrusion plates (110) located on the outer side is equal to the thickness value of the second flow guide portion (220), the second flow guide portion (220) is embedded in the second displacement slot (1112), and is flush with the end surface of the pultrusion plate (110) in the width direction (Y).

8. The girder structure according to any one of claims 1 to 4, characterized in that Along the thickness direction (X), the main beam body (100) has oppositely arranged first and second surfaces (120, 130), and at least part of the first surface (120) and at least part of the second surface (130) are provided with a reinforcing layer.

9. A method of forming a girder structure, characterized by, Applied to the main beam structure (10) according to any one of claims 1 to 8, comprising: obtaining a three-dimensional model of the main beam structure (10) according to the blade shell (20) structure of the wind power blade (1); obtaining target data of the pultrusion plate (110) according to the three-dimensional model; determining the number of the flow guide assemblies (200) and the installation positions on the plurality of pultrusion plates (110) according to the target data; opening the displacement portion (111) on the corresponding pultrusion plate (110) according to the installation position; obtaining a three-dimensional model of the main beam structure (10) according to the blade shell (20) structure of the wind power blade (1); obtaining target data of the pultrusion plate (110) according to the three-dimensional model; determining the number of the flow guide assemblies (200) and the installation positions on the plurality of pultrusion plates (110) according to the target data; opening the displacement portion (111) on the corresponding pultrusion plate (110) according to the installation position; The pultrusion plates (110) are arranged in layers and the flow guide assembly (200) is installed, so that at least part of the first flow guide parts (210) are located between the pultrusion plates (110) arranged adjacent in the thickness direction (X), and at least part of the second flow guide parts (220) are located between the pultrusion plates (110) arranged adjacent in the width direction (Y), so that at least part of the flow guide assembly (200) is embedded in the accommodation part (111), the thickness of the first flow guide part (210) and the thickness of the second flow guide part (220) are both arranged to be 0.5mm to 1.5mm, and the accommodation part (111) comprises a first accommodation groove (1111), which is arranged to be recessed inward from the side surface of the pultrusion plate (110) in the thickness direction (X), and the first flow guide part (210) is at least partially embedded in the first accommodation groove (1111).

10. The molding method according to claim 9, characterized by The target data include at least one of an angle between the pultrusion plate (110) and a horizontal plane, an angle difference between two adjacent pultrusion plates (110) and the horizontal plane, and a pre-bending change rate of the pultrusion plate (110).

11. A wind turbine blade, characterised in that A wind turbine blade (1) according to claim 11.

12. A wind power unit, characterized in that A wind turbine blade (1) according to claim 11.

Images