Wind power blade web structure with inclined struts

Abstract

The utility model relates to a wind power blade web plate structure with inclined struts. The wind power blade web plate structure comprises a front edge web plate, a tail edge web plate, a pressure side web plate connecting plate, a suction side web plate connecting plate and a plurality of web plate inclined struts, a plurality of web inclined struts are located on the inner sides and / or the outer sides of the front edge web and the tail edge web and are stacked and laid on the pressure side face and the suction side face; one end of the web inclined strut is positioned on the leading edge web or the trailing edge web, and the other end is positioned on the pressure side web connecting plate or the suction side web connecting plate on the inner side of the blade shell. The web inclined struts are additionally arranged on the original webs to provide support for the webs, meanwhile, the bonding width between the webs and the shell is increased, and the reliability of the blade is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine blades, in particular to a wind turbine blade web structure with diagonal braces. Background Art

[0002] As a key structure in wind turbines, the design and performance of wind turbine blades play a vital role in the efficiency and stability of the entire power generation system. With the growing global demand for renewable energy, the large-scale development of wind turbine blades has become an important way to improve energy capture efficiency and reduce power generation costs. However, the increase in blade size also brings higher structural load requirements, especially when subjected to dynamic wind loads, the stability and strength of the blade web face greater challenges. The traditional web design is usually vertical and fixedly connected. Although it can meet the structural requirements to a certain extent, in large blades, this design is prone to instability and damage when subjected to large shear forces, limiting the further improvement of blade performance. In order to meet this challenge, it is necessary to develop a new web structure to improve its load-bearing capacity and structural stability, thereby ensuring the reliability and safety of wind turbines under various operating conditions.

[0003] The current design of the web of wind turbine blades usually adopts a vertical and fixed connection method. Although this design meets the basic requirements of the structure to a certain extent, its limitations are gradually revealed in the context of large-scale blades and improved performance of wind turbines. Especially when subjected to periodic dynamic loads generated by wind, the web needs to withstand large shear forces, while the traditional vertical web design lacks sufficient shear resistance and structural redundancy, and is prone to local buckling, delamination, or even fracture, resulting in a decrease in the overall structural stability of the blade. In addition, when facing extreme weather conditions such as strong winds or storms, the risk of instability of the blade web is further increased, which not only affects the power generation efficiency, but may also cause safety accidents. Therefore, the existing web design has obvious deficiencies in structural stability and reliability, and it is urgent to improve its performance to meet the growing demand for wind power generation and ensure the long-term stable operation of wind turbines. Summary of the invention

[0004] In order to solve the above problems, the utility model proposes a wind turbine blade web structure with diagonal braces, which provides support for the web by adding diagonal web braces to the original web, while increasing the bonding width between the web and the shell, thereby ensuring the reliability of the blade.

[0005] The utility model discloses a wind turbine blade web structure with diagonal braces, comprising a leading edge web, a trailing edge web, a pressure side web connecting plate, a suction side web connecting plate and a plurality of web diagonal braces;

[0006] Wherein, the pressure side web connecting plate is arranged on the pressure side surface of the blade shell, and the suction side web connecting plate is arranged on the suction side surface of the blade shell; one end of the leading edge web is perpendicularly fixed to the pressure side web connecting plate, the other end of the leading edge web is perpendicularly fixed to the suction side web connecting plate, one end of the trailing edge web is perpendicularly fixed to the pressure side web connecting plate, the other end of the trailing edge web is perpendicularly fixed to the suction side web connecting plate, and the leading edge web and the trailing edge web are separated by a preset distance;

[0007] A plurality of web braces are located inside and / or outside the leading edge web and the trailing edge web, and are stacked and laid on the pressure side surface and the suction side surface;

[0008] One end of the web brace is located on the leading edge web or the trailing edge web, and the other end is located on the pressure side web connecting plate or the suction side web connecting plate inside the blade shell.

[0009] Preferably, the web brace is fixed to the leading edge web or the trailing edge web, the pressure side web connecting plate or the suction side web connecting plate by hand-laid fiberglass cloth or structural adhesive.

[0010] Preferably, the material of the web brace is fiberglass reinforced plastic or a sandwich structure composed of fiberglass reinforced plastic and a core material.

[0011] Preferably, the height of the web brace and the angle between the web brace and the leading edge web or the trailing edge web can be adjusted according to actual conditions.

[0012] Preferably, the length of the web brace in the blade length direction can be adjusted according to the actual blade.

[0013] In the utility model, web braces are added to the original web to provide support for the web, and at the same time, the bonding width between the web and the shell is increased, ensuring the reliability of the blade.

[0014] Advantages of the utility model compared with the prior art:

[0015] (1) Enhancing structural stability and reliability: By adding braces to the web of the wind turbine blade, the shear resistance and bending performance of the web can be significantly improved. This design can effectively disperse the dynamic loads borne by the blade during operation, reduce the local stress concentration of the web, and thus reduce the risk of instability caused by loading. The design of the braces allows for the optimization of the support points of the web, which helps to improve the structural integrity of the entire blade, extend the service life of the blade, reduce maintenance costs and downtime. The introduction of the braces enhances the performance of the blade under extreme weather conditions, such as high wind speeds or strong storms, thus improving the reliability and safety of the wind turbine generator set.

[0016] (2) Weight reduction and cost savings: The design of the diagonal bracing uses lightweight materials such as fiberglass or sandwich structures, which not only reduces the overall weight of the blade but also lowers the material cost. The lightweight design helps to reduce the total weight of the wind turbine generator set, thereby reducing the requirements for the tower and foundation and decreasing the construction cost of the entire wind power system. Due to the simplification and lightweight of the diagonal bracing structure, the energy consumption and environmental impact during the manufacturing process can be reduced, meeting the requirements of sustainable development and environmental protection. The design of the diagonal bracing allows for reducing the material usage of the blade without sacrificing performance, which helps to lower the production cost.

[0017] (3) Facilitating installation and maintenance: The installation process of the diagonal bracing is simple and can be fixed by hand-laying fiberglass cloth or structural adhesive, which simplifies the production process, reduces the manufacturing time, and improves the production efficiency. The design of the diagonal bracing allows for quick replacement or repair, which helps to reduce the downtime and improve the operating efficiency of the wind turbine generator set. Due to the modular design of the diagonal bracing structure, it can be easily customized and upgraded to adapt to different models of wind turbine blades or meet specific performance requirements.

[0018] (4) Improving energy conversion efficiency: By enhancing the structural stability and reliability of the blade, it can ensure that the wind turbine generator set operates efficiently under various wind speed conditions, thereby improving the overall energy conversion efficiency. The introduction of the diagonal bracing helps to reduce the vibration and noise of the blade, which not only improves the operating environment of the wind turbine generator set but also contributes to increasing the power generation efficiency.

[0019] (5) Strong adaptability: The design of the diagonal bracing can be adjusted according to different blade sizes and shapes, enabling it to adapt to various models and specifications of wind turbine blades, with good versatility and adaptability. The height and angle of the diagonal bracing can be optimized according to actual needs to meet the performance requirements of specific wind turbine generator sets, providing flexibility in design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a wind turbine blade web structure with diagonal bracing according to the present utility model;

[0021] Figure 2 is a schematic diagram of another embodiment of a wind turbine blade web structure with diagonal bracing according to the present utility model.

[0022] REFERENCE NUMERALS:

[0023] 1, leading edge web; 2, trailing edge web; 3, web diagonal bracing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the purpose, technical solutions, and advantages of the implementation of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below in conjunction with the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. The structure and technical solutions of the present utility model will be further specifically described below in conjunction with the accompanying drawings, and an embodiment of the present utility model will be given.

[0025] As Figure 1-2 shown, a wind turbine blade web structure with diagonal braces of the present utility model includes a leading edge web 1, a trailing edge web 2, a pressure side web connecting plate, a suction side web connecting plate, and a plurality of web diagonal braces 3;

[0026] Among them, the pressure side web connecting plate is arranged on the pressure side of the blade shell, and the suction side web connecting plate is arranged on the suction side of the blade shell; one end of the leading edge web 1 is perpendicularly fixed to the pressure side web connecting plate, and the other end of the leading edge web 1 is perpendicularly fixed to the suction side web connecting plate. One end of the trailing edge web 2 is perpendicularly fixed to the pressure side web connecting plate, and the other end of the trailing edge web 2 is perpendicularly fixed to the suction side web connecting plate. The leading edge web and the trailing edge web are separated by a preset distance;

[0027] A plurality of web diagonal braces 3 are located inside and / or outside the leading edge web and the trailing edge web, and are stacked and laid symmetrically on the pressure side and the suction side;

[0028] One end of the web diagonal brace 3 is located on the leading edge web 1 or the trailing edge web 2, and the other end is located on the pressure side web connecting plate or the suction side web connecting plate inside the blade shell.

[0029] The web diagonal brace 3 is fixed to the leading edge web or the trailing edge web, the pressure side web connecting plate or the suction side web connecting plate by hand-laid fiberglass cloth or structural adhesive.

[0030] The material of the web diagonal brace 3 is fiberglass reinforced plastic or a sandwich structure composed of fiberglass reinforced plastic and a core material.

[0031] The height of the web diagonal brace 3 and the angle between the diagonal brace and the web can be adjusted according to the actual situation.

[0032] The length of the web diagonal brace 3 in the blade length direction can be adjusted according to the actual blade.

[0033] The present utility model adds web braces to the original web to provide support for the web, and at the same time increases the bonding width between the web and the shell, ensuring the reliability of the blade.

[0034] Advantages of the present utility model compared with the prior art:

[0035] (1) Enhancing structural stability and reliability: By adding braces to the web of the wind turbine blade, the shear resistance and bending performance of the web can be significantly improved. This design can effectively disperse the dynamic loads borne by the blade during operation, reduce the local stress concentration of the web, and thus reduce the risk of instability caused by loading. The design of the braces allows for the optimization of the support points of the web, which helps to improve the structural integrity of the entire blade, extend the service life of the blade, reduce maintenance costs and downtime. The introduction of the braces enhances the performance of the blade under extreme weather conditions, such as high wind speeds or strong storms, thus improving the reliability and safety of the wind turbine generator set.

[0036] (2) Reducing weight and saving costs: The braces are designed with lightweight materials, such as fiberglass or sandwich structures, which not only reduce the overall weight of the blade but also lower the material cost. The lightweight design helps to reduce the overall weight of the wind turbine generator set, thereby reducing the requirements for the tower and foundation and reducing the construction cost of the entire wind power system. Due to the simplification and lightweight of the brace structure, the energy consumption and environmental impact during the manufacturing process can be reduced, meeting the requirements of sustainable development and environmental protection. The design of the braces allows for the reduction of the material usage of the blade without sacrificing performance, which helps to reduce the production cost.

[0037] (3) Facilitating installation and maintenance: The installation process of the braces is simple and can be fixed by hand-laying fiberglass cloth or structural adhesive, which simplifies the production process, reduces the manufacturing time, and improves the production efficiency. The design of the braces allows for quick replacement or repair, which helps to reduce downtime and improve the operating efficiency of the wind turbine generator set. Due to the modular design of the brace structure, it can be easily customized and upgraded to adapt to different models of wind turbine blades or meet specific performance requirements.

[0038] (4) Improving energy conversion efficiency: By improving the structural stability and reliability of the blade, it can ensure that the wind turbine generator set can operate efficiently under various wind speed conditions, thereby improving the overall energy conversion efficiency. The introduction of the braces helps to reduce the vibration and noise of the blade, which not only improves the operating environment of the wind turbine generator set but also helps to improve the power generation efficiency.

[0039] (5)Strong adaptability: The design of the diagonal brace can be adjusted according to different blade sizes and shapes, enabling it to adapt to wind turbine blades of various models and specifications, with good versatility and adaptability. The height and angle of the diagonal brace can be optimized according to actual needs to meet the performance requirements of specific wind turbine generators, providing flexibility in design.

[0040] Through the above embodiments, the object of the present utility model is fully and effectively achieved. Those skilled in the art can understand that the present utility model includes but is not limited to the content described in the drawings and the above specific embodiments. Although the present utility model has been described with respect to the currently considered most practical and preferred embodiments, it should be understood that the present utility model is not limited to the disclosed embodiments, and any modification that does not deviate from the functional and structural principles of the present utility model will be included within the scope of the claims.

Claims

1. A wind turbine blade web structure with diagonal braces, characterized in that: include: A leading edge web (1), a trailing edge web (2), a pressure side web connecting plate, a suction side web connecting plate, and a plurality of web braces (3); The pressure side web connecting plate is arranged on the pressure side of the blade shell, and the suction side web connecting plate is arranged on the suction side of the blade shell; one end of the leading edge web (1) is vertically fixed to the pressure side web connecting plate, the other end of the leading edge web (1) is vertically fixed to the suction side web connecting plate, one end of the trailing edge web (2) is vertically fixed to the pressure side web connecting plate, the other end of the trailing edge web (2) is vertically fixed to the suction side web connecting plate, and the leading edge web and the trailing edge web are spaced a preset distance apart; A plurality of web braces (3) are located on the inner side and / or outer side of the leading edge web (1) and the trailing edge web (2), and are stacked and laid on the pressure side and the suction side; One end of the web brace (3) is located on the leading edge web (1) or the trailing edge web (2), and the other end is located on the pressure side web connecting plate or the suction side web connecting plate on the inner side of the blade shell.

2. A wind turbine blade web structure with diagonal bracing according to claim 1, characterized in that: The web brace (3) is fixed to the leading edge web (1) or the trailing edge web (2), the pressure side web connecting plate or the suction side web connecting plate by hand-laid fiberglass cloth or structural adhesive.

3. A wind turbine blade web structure with diagonal bracing according to claim 1, characterized in that: The web brace (3) is made of glass fiber reinforced plastic or a sandwich structure consisting of glass fiber reinforced plastic and core material.

4. A wind turbine blade web structure with diagonal bracing according to claim 1, characterized in that: The height of the web brace (3) and the angle between the web brace and the leading edge web or the trailing edge web are adjustable.

5. The wind turbine blade web structure with diagonal bracing according to claim 1, characterized in that: The length of the web brace (3) in the blade length direction is adjustable.

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