Main beam structure, forming method, wind power blade and wind generating set

Abstract

The invention 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 generating set. The main beam structure provided by the invention comprises a main beam body which comprises a plurality of pultrusion plates which are arranged in a stacked manner; the flow guide assembly comprises a first flow guide part extending in the width direction and a plurality of second flow guide parts extending in the thickness direction, the second flow guide parts are at least partially distributed at intervals in the width direction, and the first flow guide part is connected with the second flow guide parts; wherein at least part of the first flow guide parts are located between the pultrusion plates which are adjacently arranged in the thickness direction, and at least part of the second flow guide parts are located between the pultrusion plates which are adjacently arranged in the width direction, so that at least part of the flow guide assembly is embedded into the receding parts of the pultrusion plates, and the multiple pultrusion plates are in equipotential connection; therefore, the lightning protection effect is improved. And meanwhile, stacking and separation gaps between the pultrusion plates are avoided, and the probability that the main beam structure has defects is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind power equipment, and in particular to a main beam structure, a forming method, a wind power blade and a wind turbine generator set. Background Art

[0002] In the lightning protection system of wind turbine blades, especially the lightning protection system of wind turbine blades with carbon fiber main beams, when the lightning protection system conducts current, due to electromagnetic induction, electric charges are easily formed in the carbon fiber main beam, causing discharge between the carbon fiber main beam and the lightning protection system, resulting in damage to the main beam. Therefore, it is usually necessary to set a conductive structure in the main beam to connect the main beam to the same potential to prevent damage to the main beam.

[0003] In the related art, carbon-glass hybrid fabric is usually used to connect the pultruded plates of the main beam with equal potential. However, the carbon-glass hybrid fabric has poor electrical conductivity, which leads to poor lightning protection effect. Therefore, a new main beam structure is urgently needed. Summary of the invention

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

[0005] In order to achieve the above purpose, the technical solution of this application is as follows:

[0006] In the first aspect, the present application provides a main beam structure, including: a main beam body, including a plurality of pultruded plates, the plurality of pultruded plates are stacked along the thickness direction and the width direction of the main beam body; a guide assembly, arranged on the main beam body, the guide assembly including a first guide part and a plurality of second guide parts, the first guide part extends along the width direction, the second guide part extends along the thickness direction, the plurality of second guide parts are at least partially distributed at intervals along the width direction, and the first guide part is connected to the second guide part; wherein, at least part of the first guide parts are located between the pultruded plates arranged adjacently along the thickness direction, and at least part of the second guide parts are located between the pultruded plates arranged adjacently along the width direction, so as to connect the plurality of pultruded plates with the same potential, a recessed give-way portion is provided on the pultruded plate, and at least part of the guide assembly is embedded in the give-way portion.

[0007] In one possible implementation, in the main beam structure provided by the present application, the guide assembly extends a predetermined length along the length direction of the main beam body itself; the guide assembly is provided in plurality, at least a portion of the plurality of guide assemblies are arranged in sequence along a predetermined distance in the length direction, and at least a portion of the plurality of guide assemblies are staggered in the thickness direction.

[0008] In a possible implementation, in the main beam structure provided by the present application, each second guide portion is arranged at intervals from the first guide portion along the width direction, and an accommodation area is formed between each two adjacent second guide portions and the first guide portion, and the accommodation area is used to accommodate the pultruded plate.

[0009] In a possible implementation, the main beam structure provided by the present application comprises a first give-way groove, the first give-way groove is recessed inward from one side surface of the pultruded plate in the thickness direction, and the first guide portion is at least partially embedded in the first give-way groove.

[0010] In a possible implementation, the main beam structure provided by the present application is such that along the thickness direction, two adjacent pultruded plates are arranged in close proximity and connected to each other by first give-way grooves, the sum of the groove depths of the first give-way grooves of the two adjacent pultruded plates is greater than or equal to the thickness value of the first guide portion in the thickness direction, and at least a portion of the first guide portion is embedded in the first give-way grooves of the two adjacent pultruded plates.

[0011] In a possible implementation, the main beam structure provided by the present application comprises a second give-way groove, the second give-way 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 give-way groove.

[0012] In one possible implementation, the main beam structure provided by the present application is such that along the width direction, two adjacent pultruded plates are arranged in close proximity and connected to each other by second give-way grooves, the sum of the groove depths of the second give-way grooves of the two adjacent pultruded plates is greater than or equal to the thickness value of the second guide portion in the width direction, and at least a portion of the second guide portion is embedded in the second give-way grooves of the two adjacent pultruded plates.

[0013] In one possible implementation, in the main beam structure provided by the present application, along the width direction, the depth of the second make way groove of at least one of the pultruded plates located on the outside among each pultruded plate is equal to the thickness value of the second guide portion, and the second guide portion is embedded in the second make way groove and is flush with the end face of the pultruded plate in the width direction.

[0014] In a possible implementation, the main beam structure provided by the present application has a main beam body having a first surface and a second surface that are relatively arranged 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 reinforcement layer.

[0015] In a second aspect, the present application provides a main beam structure forming method, which is applied to the above main beam structure, comprising:

[0016] Obtain a three-dimensional model of the main beam structure according to the blade shell structure of the wind turbine blade;

[0017] Obtain pultruded board target data based on the three-dimensional model;

[0018] Determine the number of guide components and installation positions on the plurality of pultruded plates according to target data;

[0019] According to the installation position, a clearance part is provided on the corresponding pultruded board;

[0020] The pultruded plates are stacked and the guide assembly is installed so that at least a portion of the first guide parts are located between the pultruded plates arranged adjacently in the thickness direction, and at least a portion of the second guide parts are located between the pultruded plates arranged adjacently in the width direction, so that at least a portion of the guide assembly is embedded in the yielding portion.

[0021] In a possible implementation, in the forming method provided by the present application, the target data includes at least one of 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 change rate of the pultruded plate.

[0022] In a third aspect, the present application provides a wind turbine blade, comprising a blade shell and the above-mentioned main beam structure, wherein the main beam structure is arranged on the blade shell.

[0023] In a fourth aspect, the present application provides a wind turbine generator set, comprising the above-mentioned wind turbine blade.

[0024] The main beam structure, forming method, wind turbine blade and wind turbine generator set provided by the present application, the main beam structure includes a main beam body and a guide assembly, the main beam body includes a plurality of stacked pultruded plates. The guide assembly includes a first guide portion extending along the width direction of the main beam body itself and a second guide portion extending along the thickness direction, the plurality of second guide portions are at least partially distributed along the width direction, the first guide portion is connected to the second guide portion, so that the current can be conducted in the guide assembly. At least part of the first guide portions are located between the pultruded plates arranged adjacently in the thickness direction, and at least part of the second guide portions are located between the pultruded plates arranged adjacently in the width direction. The current can be conducted in the main beam body along the width direction and the thickness direction, so that the plurality of pultruded plates are connected to each other at the same potential, thereby improving the lightning protection effect. The pultruded plates are recessed with a give-away portion, and at least part of the guide assembly is embedded in the give-away portion, which can avoid stacking and separation gaps between the pultruded plates, and reduce the probability of defects in the main beam structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1A structural schematic diagram of the main beam structure provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the middle flow guide assembly;

[0028] Figure 3 for Figure 1 Schematic diagram of the decomposition structure;

[0029] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0030] Figure 5 Schematic diagram of the connection between the main beam structure and the blade shell provided in the embodiment of the present application Figure 1 ;

[0031] Figure 6 Schematic diagram of the connection between the main beam structure and the blade shell provided in the embodiment of the present application Figure 2 ;

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

[0033] Figure 8 A schematic flow chart of the molding method provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1- Wind turbine blades;

[0036] 10- Main beam structure;

[0037] 100-main beam body;

[0038] 110-pultruded plate; 111-yielding portion; 1111-first yielding groove; 1112-second yielding groove;

[0039] 120- first surface;

[0040] 130- second surface;

[0041] 200- flow guide assembly;

[0042] 210- first guide portion;

[0043] 220- second guide portion;

[0044] 230-accommodation area;

[0045] 20-blade housing;

[0046] X-thickness direction; Y-width direction; Z-length direction.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0049] It should be noted that in the description of the embodiments of the present application, terms such as "upper", "lower", "inside" and "outside" indicating orientation or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0050] In addition, it should be noted that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the lightning protection system of wind turbine blades, especially the lightning protection system of wind turbine blades with carbon fiber main beams, when the lightning protection system conducts current, due to electromagnetic induction, electric charges are easily formed in the carbon fiber main beam, causing discharge between the carbon fiber main beam and the lightning protection system, resulting in damage to the main beam. Therefore, it is usually necessary to set a conductive structure in the main beam to connect the main beam to the same potential to prevent damage to the main beam.

[0053] In the related art, carbon-glass hybrid fabric is usually used to connect the pultruded plates of the main beam with equal potential. However, the carbon-glass hybrid fabric has poor electrical conductivity, which leads to poor lightning protection effect. 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 set provided by the present application, the main beam structure includes a main beam body and a guide assembly, the main beam body includes a plurality of stacked pultruded plates. The guide assembly includes a first guide portion extending along the width direction of the main beam body itself and a second guide portion extending along the thickness direction, the plurality of second guide portions are at least partially distributed along the width direction, and the first guide portion is connected to the second guide portion so that the current can be conducted in the guide assembly. At least part of the first guide portions are located between the pultruded plates arranged adjacently in the thickness direction, and at least part of the second guide portions are located between the pultruded plates arranged adjacently in the width direction. The current can be conducted in the main beam body along the width direction and the thickness direction, so that the plurality of pultruded plates are connected to each other at the same potential, thereby improving the lightning protection effect. The pultruded plates are recessed with a give-away portion, and at least part of the guide assembly is embedded in the give-away portion, 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 is described in detail below with reference to the accompanying drawings and specific embodiments.

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

[0057] Among them, at least a part of the first guide parts 210 are located between the pultruded plates 110 adjacently arranged along the thickness direction X, and at least a part of the second guide parts 220 are located between the pultruded plates 110 adjacently arranged along the width direction Y, so as to connect multiple pultruded plates 110 with the same potential. A recessed yielding part 111 is provided on the pultruded plate 110, and at least a part of the guide assembly 200 is embedded in the yielding part 111.

[0058] It is understandable that the plurality of pultruded plates 110 are stacked in layers in the thickness direction X of the main beam body 100 and are stacked in order in the width direction Y, so that the main beam structure 10 has high structural strength and stability. Optionally, the pultruded plate 110 may include a carbon fiber pultruded plate 110, which has the advantages of high strength and rigidity and relatively light weight.

[0059] In order to achieve equipotential connection 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 guide assembly 200, which may include a first flow guide portion 210 and a plurality of second flow guide portions 220. The first flow guide portion 210 extends along the width direction Y of the main beam body 100 by a predetermined length, and the length of the first flow guide portion 210 in the width direction Y of the main beam body 100 may be set to match the main beam body 100, in order to achieve equipotential connection of each pultruded plate 110 in the width direction Y, thereby improving the flow guide effect of the main beam structure 10. The plurality of second flow guide portions 220 extend along the thickness direction X of the main beam body 100, and are spaced apart in the width direction Y, in order to achieve equipotential connection of each pultruded plate 110 in the thickness direction X.

[0060] The first guide portion 210 is connected to the second guide portion 220, which not only enhances the guide effect, but also ensures the integrity of the guide assembly 200. Optionally, the first guide portion 210 and the second guide portion 220 may be an integrally formed part.

[0061] In addition, the first guide portion 210 and the second guide portion 220 can together constitute a plurality of split guides, and the split guides can include an I-shaped guide, a T-shaped guide, a Π-shaped guide, and an L-shaped guide. The split guide can also achieve equipotential connection between the pultruded plates 110. In specific implementation, an integrally formed part composed of the first guide portion 210 and the second guide portion 220 can be used, or an integrally formed part can be used partially and a split guide can be used partially, and the present application is not limited here.

[0062] Optionally, the thickness of the first guide part 210 and the thickness of the second guide part 220 can be set at 0.5 mm-1.5 mm, including the two end values ​​of 0.5 mm and 1.5 mm, and can be 1 mm. Thus, while ensuring the guide effect of the guide component 200, the guide component 200 has a certain hardness, which can achieve the effect of the limited pultruded plate 110.

[0063] At least some of the first guides 210 are disposed between adjacent pultruded plates 110 along the thickness direction X, and at least some of the second guides 220 are disposed between adjacent pultruded plates 110 along the width direction Y. This arrangement fully utilizes the space inside the main beam body 100, realizes equipotential connection between multiple pultruded plates 110, and effectively improves the lightning protection effect of the main beam structure 10.

[0064] In order to further optimize the installation and fixation of the guide assembly 200, a clearance portion 111 may be provided on the pultruded plate 110. This facilitates the embedding of the guide assembly 200, so that the guide assembly 200 can be firmly installed inside the main beam body 100. Exemplarily, the first guide portion 210 and the second guide portion 220 may be plate-like members, and may be made of a material having 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, so as to effectively fiberize each pultruded plate 110, thereby effectively avoiding stacking and separation gaps between the pultruded plates 110, and reducing the probability of defects in the main beam structure 10.

[0065] See also Figure 1 and Figure 2 In some embodiments, the guide assembly 200 extends a predetermined length along the length direction Z of the main beam body 100 itself; the guide assembly 200 is arranged in plurality, and at least a portion of the guide assemblies 200 among the plurality of guide assemblies 200 are arranged in sequence along a predetermined distance in the length direction Z, and at least a portion of the guide assemblies 200 among the plurality of guide assemblies 200 are staggered in the thickness direction X.

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

[0067] It should be noted that the guide assembly 200 can be provided in plurality. At least a portion of the guide assemblies 200 are arranged in sequence according to a predetermined distance in the length direction Z. This helps to provide a balanced guide effect at different positions of the pultruded plate 110. Optionally, in the length direction Z, the distance between two adjacent guide assemblies 200 can be set to between 15m and 20m, including the two end values ​​of 15m and 20m, and 15m can be selected.

[0068] In addition, in order to further improve the guiding effect of the guiding assembly 200, at least some of the guiding assemblies 200 among the plurality of guiding assemblies 200 may be staggered in the thickness direction X. This helps to further optimize the current conduction path and enhance the structural strength of the main beam structure 10 to a certain extent.

[0069] See also Figure 2 and Figure 3 In some embodiments, each second guide portion 220 is arranged at intervals on the first guide portion 210 along the width direction Y, and an accommodating area 230 is formed between each adjacent two second guide portions 220 and the first guide portion 210, and the accommodating area 230 is used to accommodate the pultruded plate 110.

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

[0071] This ensures that when the pultruded plate 110 carries current, the current can be smoothly transferred between the pultruded plate 110 and the guide part with the help of the guide 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 also Figure 3 and Figure 4 In some embodiments, the give-way portion 111 includes a first give-way 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 give-way groove 1111.

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

[0074] It is understandable that the setting of the first clearance groove 1111 effectively utilizes the structural characteristics of the pultruded plate 110, avoiding the problem of increased volume and weight caused by the additional addition of the guide assembly 200. It not only simplifies the production process and reduces the manufacturing cost, but also makes the entire main beam structure 10 more compact and lightweight while maintaining a good lightning protection effect.

[0075] Optionally, the first give way groove 1111 can be arranged on one side of the pultruded plate 110 in the thickness direction X, and the groove depth of the first give way 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 give way groove 1111, two adjacent pultruded plates 110 in the thickness direction X can be arranged in a close fit to enhance the structural strength of the main beam body 100.

[0076] In some embodiments, along the thickness direction X, two adjacent pultruded plates 110 are arranged in close proximity and their first give-way grooves 1111 are connected to each other, the sum of the groove depths of the first give-way grooves 1111 of the two adjacent pultruded plates 110 is greater than or equal to the thickness value of the first guide portion 210 in the thickness direction X, and at least a portion of the first guide portion 210 is embedded in the first give-way grooves 1111 of the two adjacent pultruded plates 110.

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

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

[0079] In addition, the first clearance grooves 1111 of two adjacent pultruded plates 110 are connected, which simplifies the installation process. During assembly, there is no need to perform complicated positioning and adjustment on the first guide part 210, and the first guide part 210 only needs to be embedded in the connected first clearance grooves 1111. As a result, not only the installation efficiency is improved, but also the risk of reduced diversion effect or safety hazards caused by improper installation is reduced.

[0080] See also Figure 3 and Figure 4 In some embodiments, the give-way portion 111 includes a second give-way groove 1112 , which is recessed inward from a 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 give-way groove 1112 .

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

[0082] In addition, the design of the second clearance groove 1112 simplifies the installation process and improves work efficiency. When installing the guide assembly 200, it is only necessary to align the second guide portion 220 with the second clearance groove 1112 and insert it therein to achieve fast and accurate installation. This arrangement not only reduces installation time and cost, but also reduces the risk of reduced guide effect or safety hazards caused by improper installation.

[0083] In some embodiments, along the width direction Y, two adjacent pultruded plates 110 are arranged in close proximity and the second make way grooves 1112 are connected to each other, the sum of the groove depths of the second make way grooves 1112 of the two adjacent pultruded plates 110 is greater than or equal to the thickness value of the second guide portion 220 in the width direction Y, and at least a portion of the second guide portion 220 is embedded in the second make way grooves 1112 of the two adjacent pultruded plates 110.

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

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

[0086] In addition, 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 to perform complex positioning and adjustment on the second guide portion 220, and the second guide portion 220 only needs to be embedded in 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 depth of the second make way groove 1112 of at least one of the pultruded plates 110 located on the outside among the pultruded plates 110 is equal to the thickness value of the second guide portion 220, and the second guide portion 220 is embedded in the second make way groove 1112 and is flush with the end surface of the pultruded plate 110 in the width direction Y.

[0088] Such arrangement ensures the docking between the second guide part 220 and the outer pultruded plate 110, not only achieving a neat and uniform appearance, but also enhancing the overall stability and reliability of the structure. Since the second guide part 220 is flush with the end surface 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 that are oppositely disposed, and at least a portion of the first surface 120 and at least a portion of the second surface 130 are disposed with a reinforcement layer.

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

[0091] In addition, the stress distribution of the main beam body 100 is optimized by providing the reinforcement layer. The reinforcement layer is provided in the areas of the first surface 120 and the second surface 130 corresponding to the yielding portion 111 in the main beam body 100, which can specifically enhance the strength of these weak areas and ensure the stability and safety of the overall structure of the main beam body 100.

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

[0093] See also Figures 5 to 8 On the basis of the above embodiments, the present application embodiment provides a method for forming a main beam structure 10, which is applied to the main beam structure 10 provided in any of the above embodiments, comprising:

[0094] S101 , obtaining a three-dimensional model of the main beam structure 10 according to the structure of the blade shell 20 of the wind turbine blade 1 .

[0095] In a specific implementation, since the blade shell 20 of the wind turbine blade 1 has geometric features such as a cross-sectional airfoil, a pre-bend, and a cross-sectional torsion angle, among which, Figure 7 It can be understood as a schematic diagram of the pre-bending of the wind turbine blade 1 in its own length direction Z. When the main beam structure 10 is placed in the blade mold, the pre-bending change of the main beam structure 10, the change of the cross-sectional curvature, and the size 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, stacking and separation gaps may occur 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 according to the structure of the blade shell 20 to simulate the state of the main beam structure 10 when it is placed in the blade shell 20.

[0096] S102, acquiring target data of the pultruded plate 110 according to the three-dimensional model.

[0097] By acquiring 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 , determining the number of guide assemblies 200 and installation positions on the plurality of pultruded plates 110 according to the target data.

[0099] Since the blade shell 20 is usually an irregular curved surface, when the main beam structure 10 is placed, stacking, separation gaps, etc. may occur between adjacent pultruded plates 110. At this time, it is necessary to limit the relative positions of the pultruded plates 110 so that the pultruded plates 110 can be placed in the blade mold in a fit and avoid stacking and separation gaps between adjacent pultruded plates 110. Therefore, the number and installation positions of the guide components 200 can be determined according to the target data of the pultruded plates 110, and a yield portion 111 is opened at the installation position to limit the relative positions of the pultruded plates 110 through the guide components 200.

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

[0101] S105, stack the pultruded plates 110 and install the guide assembly 200, so that at least a part of the first guide parts 210 are located between the pultruded plates 110 adjacently arranged along the thickness direction X, and at least a part of the second guide parts 220 are located between the pultruded plates 110 adjacently arranged along the width direction Y, so that at least a part of the guide assembly 200 is embedded in the yielding part 111.

[0102] In specific implementation, a layer of pultruded plate 110 is first laid on the blade mold along the thickness direction X, and then the guide assembly 200 is correspondingly embedded in the yielding portion 111, and the pultruded plate 110 is stacked according to this rule, and then the pultruded plate 110 and the blade shell 20 are integrally cast. Alternatively, the pultruded plate 110 and the guide assembly 200 can be connected and cast outside the blade mold, and then the casted main beam structure 10 is placed in the blade mold, and this application is not limited here.

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

[0104] It should be noted that, along the length direction of the pultruded plate 110, the spacing between two adjacent flow guide components 200 can be set between 15m-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 correspond to the additional flow guide component 200, thereby improving the limiting effect of the flow guide component 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 correspond to the additional flow guide component 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 correspond to the additional flow guide component 200. Thus, while ensuring the equipotential connection effect between the pultruded plates 110 , the probability of stacking and separation gaps between the pultruded plates 110 can be reduced.

[0105] See also Figure 7 On the basis of the above embodiments, an embodiment of the present application provides a wind turbine blade 1, comprising a blade shell 20 and a main beam structure 10 provided in any of the above embodiments, wherein the main beam structure 10 is arranged on the blade shell 20.

[0106] The main beam structure 10 has been described in detail in the above embodiment and will not be described again. By adopting the main beam structure 10 provided in the present application, the lightning protection effect of the wind turbine blade 1 can be improved, thereby improving the operating safety of the wind turbine blade 1.

[0107] On the basis of the above embodiments, an embodiment of the present application provides a wind turbine generator set, comprising a wind turbine blade 1 provided by any of the above embodiments.

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

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A main beam structure, characterized in that: include: A main beam body (100) comprises a plurality of pultruded plates (110), wherein the plurality of pultruded plates (110) are stacked along a thickness direction (X) and a width direction (Y) of the main beam body (100); A flow guide component (200) is arranged on the main beam body (100), the flow guide component (200) comprising a first flow guide portion (210) and a plurality of second flow guide portions (220), the first flow guide portion (210) extending along the width direction (Y), the second flow guide portion (220) extending along the thickness direction (X), the plurality of second flow guide portions (220) at least partially distributed at intervals along the width direction (Y), and the first flow guide portion (210) is connected to the second flow guide portion (220); At least part of the first flow guide portions (210) are located between the pultruded plates (110) adjacently arranged along the thickness direction (X), and at least part of the second flow guide portions (220) are located between the pultruded plates (110) adjacently arranged along the width direction (Y), so as to connect the plurality of pultruded plates (110) with equal potentials, and a recessed relief portion (111) is provided on the pultruded plate (110), and at least part of the flow guide assembly (200) is embedded in the relief portion (111).

2. The main beam structure according to claim 1, characterized in that: The flow guide component (200) extends a predetermined length along the length direction (Z) of the main beam body (100); The guide components (200) are arranged in plurality, and at least a portion of the guide components (200) among the plurality of guide components (200) are arranged in sequence along a predetermined distance in the length direction (Z), and at least a portion of the guide components (200) among the plurality of guide components (200) are staggered in the thickness direction (X).

3. The main beam structure according to claim 1, characterized in that: Each of the second air guides (220) is arranged at intervals on the first air guide (210) along the width direction (Y), and a receiving area (230) is formed between each two adjacent second air guides (220) and the first air guide (210), and the receiving area (230) is used to receive the pultruded plate (110).

4. The main beam structure according to claim 1, characterized in that: The giving way portion (111) comprises a first giving way groove (1111), wherein the first giving way groove (1111) is recessed inwardly from a side surface of the pultruded plate (110) in the thickness direction (X), and the first flow guide portion (210) is at least partially embedded in the first giving way groove (1111).

5. The main beam structure according to claim 4, characterized in that: Along the thickness direction (X), two adjacent pultruded plates (110) are arranged in close proximity and the first give-way grooves (1111) are connected to each other, the sum of the groove depths of the first give-way grooves (1111) of the two adjacent pultruded plates (110) is greater than or equal to the thickness value of the first guide portion (210) in the thickness direction (X), and at least a portion of the first guide portion (210) is embedded in the first give-way grooves (1111) of the two adjacent pultruded plates (110).

6. The main beam structure according to any one of claims 1 to 5, characterized in that: The giving way portion (111) comprises a second giving way groove (1112), wherein the second giving way groove (1112) is recessed inwardly from a side surface of the pultruded plate (110) in the width direction (Y), and the second flow guide portion (220) is at least partially embedded in the second giving way groove (1112).

7. The main beam structure according to claim 6, characterized in that: Along the width direction (Y), two adjacent pultruded plates (110) are arranged in close proximity and the second make way grooves (1112) are connected to each other, the sum of the groove depths of the second make way grooves (1112) of the two adjacent pultruded plates (110) is greater than or equal to the thickness value of the second guide portion (220) in the width direction (Y), and at least part of the second guide portion (220) is embedded in the second make way grooves (1112) of the two adjacent pultruded plates (110).

8. The main beam structure according to claim 6, characterized in that: Along the width direction (Y), the groove depth of the second give-way groove (1112) of at least one of the pultruded plates (110) located on the outside among the pultruded plates (110) is equal to the thickness value of the second guide portion (220), and the second guide portion (220) is embedded in the second give-way groove (1112) and is arranged flush with the end surface of the pultruded plate (110) in the width direction (Y).

9. The main beam structure according to any one of claims 1 to 5, characterized in that: Along the thickness direction (X), the main beam body (100) has a first surface (120) and a second surface (130) that are arranged 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 reinforcement layer.

10. A method for forming a main beam structure, characterized in that: The main beam structure (10) as claimed in any one of claims 1 to 9 comprises: Acquiring a three-dimensional model of the main beam structure (10) according to the structure of a blade shell (20) of a wind turbine blade (1); Acquiring target data of the pultruded plate (110) according to the three-dimensional model; Determining the number of the guide components (200) and their installation positions on the plurality of pultruded plates (110) according to the target data; According to the installation position, the evacuation portion (111) is provided on the corresponding pultruded plate (110); The pultruded plates (110) are stacked and the guide assembly (200) is installed so that at least a portion of the first guide parts (210) are located between the pultruded plates (110) that are adjacently arranged along the thickness direction (X), and at least a portion of the second guide parts (220) are located between the pultruded plates (110) that are adjacently arranged along the width direction (Y), so that at least a portion of the guide assembly (200) is embedded in the yielding portion (111).

11. The molding method according to claim 10, characterized in that: The target data includes at least one of 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 change rate of the pultruded plate (110).

12. A wind turbine blade, characterized in that: It comprises a blade shell (20) and a main beam structure (10) according to any one of claims 1 to 9, wherein the main beam structure (10) is arranged on the blade shell (20).

13. A wind turbine generator set, characterized in that: It comprises the wind turbine blade (1) as claimed in claim 12.

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