Large fan blade for wind power generation

Abstract

The utility model relates to the technical field of wind power blades, and discloses a large fan blade for wind power generation, which comprises a wind power blade, and main beams are respectively arranged in a blade root, a transition part and a complete wing-shaped part of the wind power blade. The main beams in the blade root, the transition part and the complete wing-shaped part are connected through reinforcing webs, the two ends of each reinforcing web are connected to the inner wall face of the wind power blade, and each main beam is of a rectangular structure connected with the inner wall face of the upper blade and the inner wall face of the lower blade of the wind power blade; the upper beam cap and the lower beam cap are connected with the inner wall faces of the upper blade and the lower blade of the wind power blade respectively, and the two shear-resistant webs are located and connected to the two sides of the upper beam cap and the two sides of the lower beam cap. Due to the design of the upper beam cap, the lower beam cap and the shear webs, the structural integrity of the wind power blade is improved, better support and rigidity are provided, the main beams are connected through the reinforcing webs to form an integral structure, the integral stability of the wind power blade is enhanced, and the wind load bearing capacity of the wind power blade is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power blades, and in particular relates to a large-scale wind blade for wind power generation. Background Art

[0002] Wind turbine blades need to have sufficient rigidity and strength to withstand extreme wind loads and various loads during operation, while also minimizing weight to improve energy efficiency. Wind turbine blades can be divided into four regions: blade root, transition, full airfoil, and blade tip based on aerodynamic shape and internal structure. The reinforced web inside the blade is the main load-bearing component in the wind turbine blade, bearing most of the bending load. The reinforced web is distributed in the three regions of blade root, transition, and full airfoil.

[0003] The reinforcing web is erected in the inner cavity of the wind turbine blade. During the use of this reinforcing web, the connection points between the reinforcing web and the wind turbine blade are the upper and lower walls of the inner cavity of the wind turbine blade respectively. The contact area at the connection point is small. Under the action of wind load, the stress will be concentrated at the point contact, which increases the local stress of the reinforcing web and may cause fatigue cracking and damage. The reinforcing web may be affected by vibration when subjected to wind load. The point contact at the connection point will aggravate the vibration effect. Long-term vibration may cause fatigue damage, which will affect the life of the blade. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a large wind blade for wind power generation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large wind blade for wind power generation, comprising a wind turbine blade, wherein the blade root, transition part, and complete airfoil of the wind turbine blade are respectively provided with main beams, wherein the blade root, transition part, and complete airfoil of the wind turbine blade are connected to each other through a reinforcing web, and both ends of the reinforcing web are connected to the inner wall surface of the wind turbine blade;

[0007] The main beam is a rectangular structure connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade.

[0008] Preferably, the main beam comprises an upper beam cap and a lower beam cap respectively connected to the inner wall surfaces of the upper and lower blade lobes of the wind turbine blade, and two shear webs located on both sides connected to the upper beam cap and the lower beam cap.

[0009] The design of the upper spar cap, lower spar cap and shear web increases the structural integrity of the wind turbine blade and provides better support and rigidity.

[0010] Preferably, the shear web and the upper beam cap and the lower beam cap are respectively made of composite laminates, and the composite laminates are formed by alternately stacking and bonding fiberboards and resin boards.

[0011] Preferably, the fiberboard is a carbon fiber board or a glass fiber board, and the resin board is an epoxy resin board or a polyester resin board.

[0012] Using composite laminates, a combination of carbon fiber sheets or glass fiber sheets with epoxy resin sheets or polyester resin sheets, has the performance advantage of low weight.

[0013] Preferably, a foam core is provided inside the shear-resistant web, and the foam core is made of PET, PVC or wood material. The foam core has the function of buffering and shock absorption.

[0014] Preferably, the upper and lower ends of the shear web are respectively provided with flanges, and the flanges are bonded to the upper beam cap and the lower beam cap by structural adhesive.

[0015] Preferably, the reinforcing webs are provided with two pieces, and a plurality of reinforcing plates are evenly distributed between the two reinforcing webs.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are:

[0017] The main beam of the large wind blade for wind power generation is arranged along the root, transition part and complete airfoil of the wind turbine blade, which can better support the blade and improve its bending resistance, thereby capturing more wind energy. The main beam is connected by strengthening the web to form an integral structure, which enhances the overall stability of the wind turbine blade and improves its ability to withstand wind loads.

[0018] The main beam is a rectangular structure connected to the inner wall of the upper and lower blades of the wind turbine blade. It can guide the airflow, thereby improving the efficiency of wind power generation. Since the reinforced web is located inside the main beam, once it is damaged or worn, it is easier to detect and repair, thereby improving the overall performance and stability of the wind turbine blade.

[0019] The use of composite laminates, especially the combination of carbon fiber boards or glass fiber boards with epoxy resin boards or polyester resin boards, can optimize the performance of the materials and achieve the design goals of high strength and low weight. Composite materials have good durability and fatigue resistance, which can extend the service life of wind turbine blades and reduce maintenance costs. Composite materials have good corrosion resistance and weathering resistance, and can maintain stable performance under various harsh environmental conditions.

[0020] By arranging main beams at the blade root, transition portion, and inside the complete airfoil portion, and arranging shear webs on both sides of the main beam, better weight distribution can be achieved, unnecessary mass concentration can be reduced, and the rotational inertia of the blade can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the main beam and the reinforced web of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the main beam of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the reinforced web of the utility model.

[0025] In the figure: 1. wind turbine blade; 11. blade root; 12. transition part; 13. complete airfoil; 2. main beam; 21. upper beam cap; 22. lower beam cap; 23. shear web; 24. foam core; 25. flange; 3. reinforced web; 4. reinforced plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The following is combined with Figure 1-4 To further explain this application in detail,

[0028] The embodiment of the present application discloses a large wind blade for wind power generation, including a wind blade 1, wherein a main beam 2 is arranged inside a blade root 11, a transition portion 12 and a complete airfoil portion 13 of the wind blade 1, and the main beams 2 inside the blade root 11, the transition portion 12 and the complete airfoil portion 13 are connected by a reinforcing web 3, and the two ends of the reinforcing web 3 are connected to the inner wall surface of the wind blade 1;

[0029] The main beam 2 is a rectangular structure connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade 1 .

[0030] The main beam 2 is arranged along the root 11, transition part 12, and complete airfoil part 13 of the wind turbine blade 1, which can better support the blade and improve its bending resistance, thereby capturing more wind energy, and can increase the contact area with the wind turbine blade 1. The reinforcing web 3 connects the main beam 2 to form an integral structure, thereby enhancing the overall stability of the wind turbine blade 1 and improving its ability to withstand wind loads. The main beam 2 is a rectangular structure connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade 1, which can guide airflow and improve wind power generation efficiency. Since the reinforcing web 3 is located inside the main beam 2, once damage or wear occurs, detection and maintenance are relatively easy, thereby improving the overall performance and stability of the wind turbine blade 1.

[0031] like Figure 3As shown, the main beam 2 includes an upper beam cap 21 and a lower beam cap 22 respectively connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade 1 , and two shear webs 23 located on both sides connected to the upper beam cap 21 and the lower beam cap 22 .

[0032] The design of the upper beam cap 21, the lower beam cap 22 and the shear web 23 increases the structural integrity of the wind turbine blade 1, provides better support and rigidity, and enables the blade to withstand wind loads more effectively. By arranging the main beam 2 inside the blade root 11, the transition portion 12, and the complete airfoil portion 13, and arranging the shear web 23 on both sides of the main beam 2, better weight distribution can be achieved, unnecessary mass concentration can be reduced, thereby reducing the rotational inertia of the blade and improving the efficiency of the wind turbine.

[0033] The shear web 23 and the upper beam cap 21 and the lower beam cap 22 are respectively made of composite laminates, which are formed by alternately stacking and bonding fiberboards and resin boards.

[0034] The fiberboard is a carbon fiber board or a glass fiber board, and the resin board is an epoxy resin board or a polyester resin board.

[0035] The use of composite laminates, especially the combination of carbon fiber boards or glass fiber boards with epoxy resin boards or polyester resin boards, can optimize the performance of the materials and achieve the design goals of high strength and low weight. Composite materials have good durability and fatigue resistance, which can extend the service life of wind turbine blades 1 and reduce maintenance costs. Composite materials have good corrosion resistance and weathering resistance and can maintain stable performance under various harsh environmental conditions.

[0036] A foam core 24 is provided inside the shear web 23 , and the foam core 24 is made of PET, PVC or wood material.

[0037] The foam core 24 has the function of buffering and shock absorption, which can reduce the impact and vibration of wind load on the wind turbine blade 1 and improve the running stability of the blade.

[0038] The upper and lower ends of the shear web 23 are respectively provided with flanges 25 , and the flanges 25 are bonded to the upper beam cap 21 and the lower beam cap 22 by structural adhesive.

[0039] The flange 25 is bonded to the upper beam cap 21 and the lower beam cap 22 by structural adhesive, which can enhance the connection strength between the shear web 23 and the upper beam cap 21 and the lower beam cap 22 and improve the durability of the shear web 23 .

[0040] like Figure 4 As shown, there are two reinforcing webs 3, and a plurality of reinforcing plates 4 are evenly distributed between the two reinforcing webs 3. The arrangement of the reinforcing webs 3 and the reinforcing plates 4 can increase the overall strength of the wind turbine blade 1 and improve its ability to withstand wind loads.

[0041] The main beam 2 in the large wind blade for wind power generation is arranged along the blade root 11, the transition part 12, and the complete airfoil part 13 of the wind turbine blade 1, which can provide effective support for the wind turbine blade 1 and improve its bending resistance, thereby capturing more wind energy. The design of the main beam 2 can also increase the contact area with the wind turbine blade 1, further enhancing the support effect on the wind turbine blade 1.

[0042] The shear web 23 and the upper beam cap 21 and the lower beam cap 22 are respectively made of composite laminates, which can optimize the performance of the material and achieve the design goal of high strength and low weight. At the same time, the composite material has good durability and fatigue resistance, which can extend the service life of the wind turbine blade 1 and reduce maintenance costs. In addition, a foam core 24 is provided on the inner side of the shear web 23, which has the function of buffering and shock absorption, can reduce the impact and vibration of the wind load on the wind turbine blade 1, and improve the running stability of the blade.

[0043] There are two reinforcing webs 3, and a plurality of reinforcing plates 4 are evenly distributed between the two reinforcing webs 3. The arrangement of the reinforcing webs 3 and the reinforcing plates 4 can increase the overall strength of the wind turbine blade 1 and further improve its ability to withstand wind loads. These design improvements not only improve the structural performance and energy efficiency of the wind turbine blade 1, but also take into account the performance optimization and long-term cost-effectiveness of the material.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large wind blade for wind power generation, comprising a wind turbine blade (1), characterized in that: The blade root (11), transition portion (12) and complete airfoil portion (13) of the wind turbine blade (1) are respectively provided with main beams (2); the blade root (11), transition portion (12) and complete airfoil portion (13) are connected to each other through a reinforcing web (3), and both ends of the reinforcing web (3) are connected to the inner wall surface of the wind turbine blade (1); The main beam (2) is a rectangular structure connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade (1).

2. A large wind blade for wind power generation according to claim 1, characterized in that: The main beam (2) comprises an upper beam cap (21) and a lower beam cap (22) respectively connected to the inner wall surfaces of the upper and lower blades of the wind turbine blade (1), and two shear webs (23) located on both sides connected to the upper beam cap (21) and the lower beam cap (22).

3. A large wind blade for wind power generation according to claim 2, characterized in that: The shear-resistant web (23) and the upper beam cap (21) and the lower beam cap (22) are respectively made of composite laminates, and the composite laminates are made of fiberboard and resin boards that are alternately stacked and bonded.

4. A large wind blade for wind power generation according to claim 3, characterized in that: The fiberboard is a carbon fiber board or a glass fiber board, and the resin board is an epoxy resin board or a polyester resin board.

5. A large wind blade for wind power generation according to claim 2, characterized in that: A foam core (24) is provided inside the shear-resistant web (23), and the foam core (24) is made of PET, PVC or wood material.

6. A large wind blade for wind power generation according to claim 2, characterized in that: The upper and lower ends of the shear web (23) are respectively provided with flanges (25), and the flanges (25) are bonded to the upper beam cap (21) and the lower beam cap (22) by means of structural adhesive.

7. The large wind blade for wind power generation according to claim 1, characterized in that: The reinforcing web (3) is provided with two pieces, and a plurality of reinforcing plates (4) are evenly distributed between the two reinforcing webs (3).

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