Trailing edge serrated wind power blade with high-efficiency noise reduction structure

Abstract

The utility model relates to the technical field of power generation blade, concretely relates to a rear edge sawtooth wind power generation blade with high -efficient noise reduction structure, including main part assembly, including generator, the generator one side is provided with the blade body, the generator bottom is fixed with the base, auxiliary assembly is set up in the blade body, including reinforcing rib, the reinforcing rib is located in the blade body. The blade has the noise reduction ability and controls the operation noise at the low level, can weaken the periodic vibration because of the aerodynamic noise, reduces the additional alternating load that the blade bears to slow down the material fatigue speed, avoids the problem such as the blade premature wear and tear, can reduce the component loss caused by vibration simultaneously, reduces the blade breakage.

Description

Technical Field

[0001] This utility model relates to the field of power generation blade technology, specifically to a trailing edge serrated wind power generation blade with a high-efficiency noise reduction structure. Background Technology

[0002] Wind turbine blades are key components of wind turbine generators. They are mounted on the hub of the wind turbine and rotate with the wind, efficiently converting wind energy into mechanical energy, and ultimately converting mechanical energy into electrical energy.

[0003] In the prior art, the wind turbine blade with reinforced structure, patent application number CN202421513889.9, includes a base, a relay block, and a blade connected in sequence. The blade mainly consists of a skin and a cable mechanism disposed within the skin. The cable mechanism includes cables, one end of which is connected to the inner wall of the relay block via a flange, and the other end of which is connected to the inner wall of the skin on the side away from the relay block via a flange. This product, by alternately arranging the first, second, third, and fourth cables inside the skin, utilizes the lightweight and high-strength characteristics of the cable mechanism itself to transmit the enormous centrifugal force generated at the end of the cable mechanism during blade rotation to the relay block. This reduces the overall weight of the blade while ensuring its strength and toughness. In summary, this invention features low cost, high strength, and a long expected service life. During the rotation of wind turbine blades, aerodynamic noise is generated due to pressure pulsation on the blade surface. The noise is accompanied by periodic vibration, which will subject the blades to additional alternating loads, accelerate material fatigue, shorten the blade design life, and increase the frequency of component replacement. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a trailing edge serrated wind turbine blade with a high-efficiency noise reduction structure, which can effectively solve the problem of noise generated by the blades of the generator when rotating in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a trailing edge serrated wind turbine blade with a high-efficiency noise reduction structure, including a main body assembly, including a generator, with a blade body disposed on one side of the generator, and a base fixed to the bottom of the generator; An auxiliary component, disposed on the blade body, includes a reinforcing rib located within the blade body. A serrated sleeve is fixed to the leading edge of the blade body, and a blade tip winglet is movably connected to the trailing edge of the blade body.

[0006] Furthermore, the auxiliary component also includes a fixing member, which includes a support rod fixed to one side of the reinforcing rib.

[0007] Furthermore, a threaded rod is inserted into one side of the support rod, and a nut is threaded onto the outer side of the threaded rod. The threaded rod is inserted into the bottom of the reinforcing rib, and the threaded rod and the reinforcing rib are movably connected.

[0008] Furthermore, the reinforcing ribs are arranged in a cross-shaped, oblique truss configuration, and the intersections of the reinforcing ribs are curved.

[0009] Furthermore, a serrated tooth is fixed on one side of the serrated sleeve, and a through air hole is opened on the serrated tooth.

[0010] Furthermore, the auxiliary component also includes a movable part, which includes a protrusion fixed to one side of the blade tip winglet.

[0011] Furthermore, the protrusion adopts an arc-shaped design, and multiple protrusions are fixed to one side surface of the blade tip winglet in a side-by-side arrangement along the transverse direction.

[0012] Furthermore, an arc-shaped groove is provided on one side of the protrusion, and the arc-shaped groove adopts a streamlined curved surface design.

[0013] Compared with the known prior art, the technical solution provided by this utility model has the following beneficial effects: the blade has noise reduction capability and controls the operating noise at a low level. By weakening the periodic vibration caused by aerodynamic noise, the additional alternating load on the blade can be reduced, thereby slowing down the material fatigue rate and avoiding premature wear of the blade. At the same time, it can reduce component wear caused by vibration and reduce blade breakage. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the blade body of this utility model; Figure 3 This is a schematic diagram of the reinforcing rib of this utility model; Figure 4 This is a schematic diagram of the blade tip winglet of this utility model; Figure 5 For the present utility model Figure 4 Enlarged view of a portion of point A in the middle; Figure 6 This is a schematic diagram of the serrated teeth of this utility model.

[0016] The labels in the diagram represent: 1. Main component; 11. Generator; 12. Blade body; 13. Base; 2. Auxiliary component; 211. Reinforcing rib; 212. Serrated sleeve; 213. Blade tip winglet; 22. Fixing component; 221. Support rod; 222. Threaded rod; 223. Nut; 224. Serrated tooth; 225. Air vent; 23. Moving part; 231. Protrusion; 232. Arc groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example: A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure, as shown in the attached figure. Figure 1 - Appendix Figure 5 It includes a main component 1 and an auxiliary component 2. The main component 1 includes a generator 11, a blade body 12 is provided on one side of the generator 11, and a base 13 is fixed at the bottom of the generator 11. The generator 11 further converts the mechanical energy captured by the blade body 12 from wind energy into electrical energy. The blade body 12 is mainly responsible for capturing wind energy and converting it into mechanical energy to drive the generator 11 to rotate. The base 13 is used to stably support the generator 11 and ensure that it remains stable and reliable during operation.

[0020] The auxiliary component 2 is disposed on the blade body 12. The auxiliary component 2 includes a reinforcing rib 211, a serrated sleeve 212 and a blade tip winglet 213. The reinforcing rib 211 is located inside the blade body 12. The serrated sleeve 212 is fixed to the leading edge of the blade body 12, and the blade tip winglet 213 is movably connected to the trailing edge of the blade body 12.

[0021] The reinforcing rib 211 is located inside the blade body 12 and is used to enhance the structural strength of the blade body 12 so that it can better withstand various loads. The serrated sleeve 212 can cut and disturb the airflow around the blade body 12, optimize aerodynamic performance and reduce noise. The blade tip winglet 213 is movably connected to one side of the blade body 12 to improve the airflow conditions at the trailing edge of the blade body 12, improve wind energy utilization efficiency and reduce energy loss.

[0022] Specifically, the auxiliary component 2 also includes a support rod 221, which is fixed to one side of the reinforcing rib 211.

[0023] The support rod 221 provides auxiliary support for the reinforcing rib 211, further stabilizing the structure of the reinforcing rib 211 within the blade body 12 and enhancing the overall load-bearing capacity of the blade body 12.

[0024] Furthermore, a threaded rod 222 is inserted into one side of the support rod 221, and a nut 223 is threadedly connected to the outside of the threaded rod 222. The threaded rod 222 is inserted into the bottom of the reinforcing rib 211, and the threaded rod 222 and the reinforcing rib 211 are movably connected.

[0025] The threaded rod 222 cooperates with the support rod 221 to connect, position and transmit force, thereby enhancing structural stability. The nut 223 is tightened on the threaded rod 222 to secure the support rod 221 and the reinforcing rib 211, preventing loosening of the connection and ensuring the stability of the overall structure.

[0026] Preferably, the reinforcing ribs 211 are arranged in a cross-shaped oblique truss layout, and the intersections of the reinforcing ribs 211 adopt an arc shape.

[0027] The stiffeners 211 are arranged in a cross pattern to enhance the structural strength of the blade body 12 from multiple directions, so that the blade body 12 can bear various complex external loads more evenly. The intersection of the stiffeners 211 is set with an arc-shaped structure to optimize the flow state of the airflow inside the blade body 12 and reduce the adverse effects on aerodynamic performance.

[0028] It should be noted that a serrated tooth 224 is fixed on one side of the serrated sleeve 212, and a through air hole 225 is opened on the serrated tooth 224.

[0029] The serrations 224 are mainly used to cut and break up the airflow at the leading edge of the blade body 12, decomposing large-scale eddies into small-scale eddies, thereby optimizing the airflow state around the blade body 12, reducing aerodynamic noise and improving wind energy utilization efficiency. The through-vents 225 opened on the serrations 224 can guide some airflow through, forming a jet effect. By exchanging momentum with the mainstream, it promotes airflow mixing, further improving the flow characteristics of the airflow, reducing airflow separation and the pressure fluctuation amplitude on the surface of the serrations 224, and enhancing the noise reduction effect and aerodynamic performance.

[0030] The direction of the air vent 225 is adapted to the direction of the mainstream airflow in the area where the serration 224 of the blade body 12 is located during operation. In a specific embodiment, it can be arranged at an acute angle of 45 degrees along the tangent of the airflow to ensure that the airflow can pass through the air vent 225 with low resistance, efficiently form a jet effect, better mix with the mainstream airflow, and thus enhance the noise reduction function.

[0031] Furthermore, the auxiliary component 2 also includes a protrusion 231, which is fixed to one side of the blade tip winglet 213.

[0032] The protrusion 231 is fixed to the lower surface of one side of the blade tip winglet 213. By changing the local shape structure of the blade tip winglet 213, the protrusion 231 disturbs the airflow at the trailing edge of the blade body 12, optimizes the airflow state, suppresses airflow separation, reduces the intensity of the blade tip vortex, and thus improves the aerodynamic performance of the blade tip winglet 213 and the blade body 12, improves wind energy utilization efficiency, and also helps to reduce aerodynamic noise caused by airflow turbulence.

[0033] Specifically, the protrusion 231 adopts an arc-shaped design, and multiple protrusions 231 are fixed on one side surface of the blade tip winglet 213 in a parallel arrangement along the lateral direction.

[0034] The protrusion 231 guides the airflow in the blade tip region along a preset path through its arc shape. Combined with the lateral parallel layout, it forms an orderly airflow disturbance sequence, which can not only disperse and weaken the energy of the blade tip vortex and reduce airflow separation, but also optimize the local pressure distribution through the synergistic effect of multiple protrusions 231, thereby improving the aerodynamic efficiency of the blade tip winglet 213 and reducing the noise caused by airflow turbulence.

[0035] Preferably, the blade tip winglet 213 has an arc-shaped groove 232 on one side of the protrusion 231, and the arc-shaped groove 232 adopts a streamlined curved surface design.

[0036] The arc-shaped groove 232 is located on one side of the blade tip winglet 213. The arc-shaped groove 232 utilizes the characteristics of the streamlined curved surface to guide the airflow passing through this area more smoothly, so that the airflow can flow along a path that conforms to the principles of aerodynamics. This further optimizes the airflow state at the blade tip winglet 213, reduces airflow turbulence, and reduces the possibility of airflow separation and vortex generation. This improves the aerodynamic performance of the entire blade body 12, increases wind energy utilization efficiency, and also helps to better control and reduce noise caused by poor airflow.

[0037] In use, the blade body 12 is first installed on one side of the generator 11, and the generator 11 is stably fixed in the designated position by the base 13. The reinforcing ribs 211 arranged crosswise inside the blade body 12 enhance the structural strength of the blade body 12. The support rod 221 is vertically fixed to the side of the reinforcing rib 211 facing the blade body 12, and the other end of the support rod 221 abuts against the surface of the blade body 12. At the same time, the threaded rod 222 is inserted through the support rod 221 in a direction perpendicular to the connection surface between the reinforcing rib 211 and the blade body 12, and then the nut 223 fitted on the threaded rod 222 is tightened, so that the nut 223 and the support rod 221 together clamp the reinforcing rib 211 from both sides. In this way, with the support of the support rod 221 and the tightening effect of the threaded rod 222 and the nut 223, the stability of the connection between the reinforcing rib 211 and the blade body 12 is enhanced in multiple dimensions, preventing the blade body 12 from deforming or being damaged due to excessive load when rotating.

[0038] When the wind drives the blade body 12 to rotate, the serrated sleeve 212 on one side of the blade body 12 drives the serrated teeth 224 to cut the leading edge airflow, decomposing the large-scale vortex into small-scale vortices. The through-vent 225 on the serrated teeth 224 guides part of the airflow to form a jet effect, promotes airflow mixing, and reduces aerodynamic noise. At the same time, the protrusion 231 on one side of the blade tip winglet 213 disturbs the trailing edge airflow and inhibits airflow separation. The arc groove 232 of the protrusion 231 guides the airflow to flow smoothly, weakens the blade tip vortex intensity, further reduces the noise caused by airflow turbulence, and ensures that the normal life of the surrounding residents is not disturbed.

[0039] The blade body 12 rotates continuously, driving the generator 11 to operate and convert wind energy into electrical energy. The stable airflow reduces the irregular impact and vibration on the blade body 12 and transmission components, reduces component friction loss, and extends the service life of the equipment. The entire process achieves the dual effects of high-efficiency power generation and low-noise operation, improving the practicality and environmental compatibility of the wind turbine generator set.

[0040] In summary, the blade body 12 has noise reduction capabilities, and the noise intensity generated by the generator 11 during operation can be controlled at a low level, which will not reach the level of disturbing the daily life of surrounding residents. When the blade body 12 has effective noise reduction capabilities, it means that the airflow around it is relatively more stable, and turbulent vortices and turbulence are better suppressed. As a result, the irregular impact force and vibration experienced by the blade body 12 and the transmission components connected to it will be significantly reduced, and the friction between the components can be maintained at a normal level.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure, characterized in that, include: The main component (1) includes a generator (11), a blade body (12) is provided on one side of the generator (11), and a base (13) is fixed at the bottom of the generator (11). An auxiliary component (2) is disposed on the blade body (12) and includes a reinforcing rib (211). The reinforcing rib (211) is located inside the blade body (12). A serrated sleeve (212) is fixed to the leading edge of the blade body (12), and a blade tip winglet (213) is movably connected to the trailing edge of the blade body (12).

2. The trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 1, characterized in that, The auxiliary component (2) also includes a support rod (221), which is fixed to one side of the reinforcing rib (211).

3. The trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 2, characterized in that, A threaded rod (222) is inserted into one side of the support rod (221), and a nut (223) is threaded to the outside of the threaded rod (222). The threaded rod (222) is inserted into the bottom of the reinforcing rib (211), and the threaded rod (222) and the reinforcing rib (211) are movably connected.

4. The trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 3, characterized in that, The reinforcing ribs (211) are arranged in a cross-shaped truss configuration, and the intersections of the reinforcing ribs (211) are curved.

5. A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 4, characterized in that, The serrated sleeve (212) has a serrated tooth (224) fixed on one side, and the serrated tooth (224) has a through air hole.

6. A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 5, characterized in that, The auxiliary component (2) also includes a protrusion (231) which is fixed to one side of the blade tip winglet (213).

7. A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 6, characterized in that, The protrusion (231) adopts an arc-shaped design, and multiple protrusions (231) are fixed on one side surface of the blade tip winglet (213) in a parallel arrangement along the lateral direction.

8. A trailing-edge serrated wind turbine blade with a high-efficiency noise reduction structure according to claim 7, characterized in that, The protrusion (231) has an arc groove (232) on one side, and the arc groove (232) adopts a streamlined curved surface design.

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