Noise reduction device for a wind turbine

Abstract

This invention relates to the field of wind turbine technology and specifically discloses a noise reduction device for a wind turbine. It includes a fixed circular plate, a curved baffle fixedly connected to one side of the fixed circular plate, a circular sleeve plate fixedly connected to the side of the curved baffle away from the fixed circular plate, and a concave sound-absorbing cotton fixedly connected to the side of the fixed circular plate near the curved baffle. This noise reduction device for a wind turbine, by setting multiple curved baffles around the outside of the generator assembly to block and reduce noise, prevents the common noise-reducing shell from only sequentially blocking and intercepting noise waves, resulting in poor noise reduction and still causing a certain degree of noise. By setting the curved baffles with a zigzag shape around the outside of the generator assembly to block noise while facilitating air circulation, it prevents the sound-absorbing shell from completely enclosing the wind turbine in a sealed state, which would lead to low heat dissipation efficiency and be difficult to manage during long-term operation.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, specifically to a noise reduction device for wind turbines. Background Technology

[0002] Wind power generation is a method of generating electricity that uses wind power to drive blades to rotate and convert the kinetic energy generated by the blades into electrical energy. It is favored for its clean, pollution-free, and renewable characteristics. The wind turbine rotates under the action of wind, converting the kinetic energy of the wind into mechanical energy. The wind turbine shaft accelerates the low-speed rotation to the high speed required by the generator through a gearbox or direct drive system. The generator uses the principle of electromagnetic induction to convert mechanical energy into electrical energy. Wind turbines generate a certain amount of noise when they are running. The sources of noise are mechanical noise and aerodynamic noise. Mechanical noise refers to the noise generated by the mechanical components of the wind turbine, such as the gearbox, generator, and bearings, during operation due to mutual friction, vibration, and gear meshing. Aerodynamic noise refers to the noise generated when the wind blows over the blades, creating a pressure difference on the blade surface, causing turbulence and vibration of the airflow. When reducing noise in wind turbines, most methods involve directly covering the turbine with a sound-absorbing shell to reduce noise transmission. However, when the sound-absorbing shell completely encloses the wind turbine, it creates a sealed environment, resulting in low heat dissipation efficiency during long-term operation, which is difficult to address. Therefore, we propose a noise reduction device for wind turbines. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a noise reduction device for a wind turbine, including a rotating shaft, one end of which is rotatably connected to a generator assembly via a rotating bolt, a noise reduction mechanism fixedly connected to the outside of the generator assembly, a shock absorption mechanism fixedly connected to the outside of the rotating shaft, a circular connecting plate fixedly connected to the end of the rotating shaft away from the generator assembly, a blade fixedly connected to the outside of the circular connecting plate, and an interception and protection mechanism rotatably connected to the side of the circular connecting plate away from the rotating shaft via a rotating bolt. The noise reduction mechanism includes a fixed circular plate, and a curved baffle is fixedly connected to one side of the fixed circular plate. By setting multiple curved baffles around the generator assembly to block and reduce noise, it prevents the noise reduction shell from only blocking and intercepting the noise waves in sequence, which results in poor noise reduction effect and still causes a certain degree of noise. By setting the curved baffles with a tortuous shape on the outside of the generator assembly to block noise, it also facilitates air circulation and prevents the soundproof shell from completely covering the wind turbine and forming a sealed state, which would lead to low heat dissipation efficiency and difficulty in handling during long-term operation. A circular sleeve plate is fixedly connected to the side of the curved baffle away from the fixed circular plate. The noise reduction mechanism is sleeved on the rotating shaft and rotatably connected to the rotating shaft through a bearing. The side of the shock absorption mechanism away from the generator assembly is rotatably connected to the side of the noise reduction mechanism through a bearing. The side of the circular connecting plate close to the rotating shaft is rotatably connected to the side of the noise reduction mechanism through a bearing. The circular sleeve is fitted onto the rotating shaft and is rotatably connected to the rotating shaft via a bearing. The side of the circular sleeve closer to the curved baffle is rotatably connected to the side of the shock absorption mechanism via a bearing, and the side of the circular sleeve away from the curved baffle is rotatably connected to the side of the circular connecting plate via a bearing. The side of the fixed circular plate near the curved baffle is fixedly connected to one side of the generator assembly. Multiple curved baffles are provided, and the multiple curved baffles are circumferentially distributed between the fixed circular plate and the circular sleeve plate. A concave sound-absorbing cotton 1 is fixedly connected to the side of the fixed circular plate near the curved baffle, and a concave sound-absorbing cotton 2 is fixedly connected to the side of the fixed circular plate near the curved baffle. By setting concave sound-absorbing cotton 1 and concave sound-absorbing cotton 2 on the inner side of the curved baffle, the continuously propagating noise waves are fully contact-type silenced, preventing some of the noise generated by the generator assembly and rotating shaft from effectively propagating outward when passing through the curved path of the curved baffle, which would lead to unstable noise reduction effect. By setting concave sound-absorbing cotton 1 and concave sound-absorbing cotton 2 on the curved path on the inner side of the curved baffle, the area covered by the curved baffle is filled, preventing the noise generated by the generator assembly and rotating shaft from propagating out from the other side of the curved baffle, which would make it difficult to effectively reduce noise. The concave sound-absorbing cotton I is fixedly connected to one side of the circular sleeve plate on the side away from the fixed circular plate, and the concave sound-absorbing cotton II is fixedly connected to one side of the circular sleeve plate on the side away from the fixed circular plate. Multiple concave sound-absorbing cotton I are provided, and the multiple concave sound-absorbing cotton I are circumferentially distributed between the fixed circular plate and the circular sleeve plate and are parallel and aligned with the concave area of ​​the curved baffle. Multiple concave sound-absorbing cotton II are provided, and the multiple concave sound-absorbing cotton II are circumferentially distributed between the fixed circular plate and the circular sleeve plate and are parallel and aligned with the concave area of ​​the curved baffle.

[0004] Furthermore, the damping mechanism includes a docking ring plate, a damping spring fixedly connected to one side of the docking ring plate, and a rounded corner side plate fixedly connected to the end of the damping spring away from the docking ring plate. A bidirectional electric telescopic rod is fixedly connected to the side of the rounded corner side plate near the damping spring. By setting the bidirectional electric telescopic rod between the docking ring plate and the rounded corner side plate at a position inside the damping spring, the damping spring can be adjusted to its optimal elastic state. This prevents the damping spring from continuously expanding and contracting due to the vibration of the rotating shaft and the generator assembly, which would lead to unstable damping effect and affect the damping and noise reduction effect. The expansion and contraction adjustment of the bidirectional electric telescopic rod pushes the rounded corner side plate to ensure that the built-in rollers are always in close contact with the surface of the generator assembly. This prevents the rounded corner side plate, which is elastically connected to the damping spring, from losing close contact with the generator assembly due to vibration and shaking, resulting in poor integrated damping effect. The side of the rounded corner side plate away from the damping spring is rotatably connected to a built-in ball bearing. By setting the side of the rounded corner side plate near the generator assembly... Multiple built-in ball bearings roll into contact with the generator assembly to reduce wear noise during rotational contact. This prevents excessive friction noise caused by pressure when the rounded corner side plate is in close contact with the generator assembly surface. By setting built-in ball bearings on one side of the rounded corner side plate, the rounded corner side plate is directly separated from the generator assembly, preventing continuous wear and damage caused by prolonged pressure and frictional rotational contact with the generator assembly surface. The docking ring plate is sleeved on the rotating shaft and fixedly connected to the rotating shaft. The side of the docking ring plate away from the shock-absorbing spring is rotatably connected to the side of the circular sleeve plate through a bearing. The rounded corner side plate is sleeved on the rotating shaft and fixedly connected to the rotating shaft. Multiple shock-absorbing springs are provided and are circumferentially distributed between the docking ring plate and the rounded corner side plate. Multiple bidirectional electric telescopic rods are provided and are respectively located inside the shock-absorbing springs. Multiple built-in ball bearings are provided and are circumferentially distributed on one side of the rounded corner side plate.

[0005] Furthermore, the interception and protection mechanism includes a docking circular plate, with a long cylindrical rod fixedly connected to the outer side of the docking circular plate. A rigid arc brush is fixedly connected to the outer side of the long cylindrical rod. By setting the rigid arc brush on the outer side of the long cylindrical rod, the surface of the blade is cleaned to prevent debris from easily adhering to the surface of the curved blade after long-term use, thus intercepting and turbulently blocking the flowing air and reducing the efficiency of the blade in absorbing wind energy. A long connecting plate is fixedly connected to the outer side of the docking circular plate, and an arc-shaped baffle is fixedly connected to one side of the long connecting plate. The blade, by setting arc-shaped baffles on one side of the long connecting plate at the inclined surfaces on both sides of the blade, blocks the debris cleaned by the rigid arc brush, so that the debris can only be discharged towards the second ring frame. This prevents the cleaned debris from being pushed by the wind and falling onto the curved baffle and accumulating between the curved baffle, the concave sound-absorbing cotton one, and the concave sound-absorbing cotton two, which are difficult to handle. The side of the long connecting plate away from the arc-shaped baffle is fixedly connected to the first ring frame, and the side of the long connecting plate near the first ring frame is fixedly connected to the second ring frame. A third ring frame is fixedly connected to one side of the second ring frame. By setting the first, second, and third ring frames on the side of the blade that receives wind energy, blocky debris in the wind is intercepted and protected. This prevents large blocky debris in the wind from directly impacting the blade when the wind is strong, thus preventing the blade from being gradually damaged by the impact force. The edges of the first, second, and third ring frames are rounded to allow the wind to pass through more smoothly and contact the blade. This prevents some of the wind blowing towards the blade from hitting the plane when it comes into contact with the first, second, and third ring frames, which would cause convection and make it difficult to pass smoothly, thus affecting the wind's driving effect on the blade. One side of the docking circular plate is rotatably connected to one side of the circular connecting plate by a rotating bolt. Three long round rods are provided, and the three long round rods are distributed circumferentially on the outside of the docking circular plate. Multiple long connecting plates are provided, and the multiple long connecting plates are distributed on the outside of the docking circular plate at a position perpendicularly aligned with both sides of the blade. The radii of the first, second, and third ring frames are progressively larger.

[0006] This invention provides a noise reduction device for a wind turbine. It has the following beneficial effects: 1. The noise reduction device of this wind turbine uses a curved baffle with a zigzag shape on the outside of the generator assembly to block noise while facilitating airflow. This prevents the soundproof shell from completely enclosing the wind turbine, which would result in a sealed state and lead to low heat dissipation efficiency during long-term operation. A bidirectional electric telescopic rod is installed between the connecting ring plate and the rounded corner side plate, located inside the damping spring, to adjust the damping spring to its optimal elasticity. This prevents the damping spring from being continuously stretched and swayed due to the vibration of the rotating shaft and the generator assembly, which would make the damping effect unstable and affect the noise reduction effect. A first ring frame, a second ring frame, and a third ring frame are installed on the side of the blade that receives wind energy to intercept and protect against blocky debris in the wind. This prevents large blocky debris in the wind from directly impacting the blade and causing damage due to the impact force.

[0007] 2. The noise reduction device of this wind turbine is equipped with a noise reduction mechanism. Multiple curved baffles are installed on the outside of the generator assembly to block and reduce sound waves. This prevents the noise reduction effect of ordinary noise-reducing shells, which only block and intercept noise waves sequentially, resulting in poor noise reduction and still causing a certain degree of noise. The curved baffles on the outside of the generator assembly block noise while facilitating airflow. This prevents the soundproof shell from completely enclosing the wind turbine, creating a sealed state that leads to low heat dissipation efficiency during long-term operation. The curved baffle is equipped with concave sound-absorbing cotton I and concave sound-absorbing cotton II on its inner side to fully contact and absorb the continuously propagating noise waves. This prevents some of the noise generated by the generator assembly and rotating shaft from effectively propagating outwards when passing through the curved path of the curved baffle, which would lead to unstable noise reduction. By setting concave sound-absorbing cotton I and concave sound-absorbing cotton II on the curved path inside the curved baffle to fill the area covered by the curved baffle, the noise generated by the generator assembly and rotating shaft is prevented from propagating outwards from the other side of the curved baffle, making it difficult to effectively reduce the noise.

[0008] 3. The noise reduction device of this wind turbine is equipped with a vibration damping mechanism. A bidirectional electric telescopic rod is installed between the connecting ring plate and the rounded corner side plate, located inside the vibration damping spring, to adjust the vibration damping spring to its optimal elastic state. This prevents the vibration damping spring from being continuously affected by the vibration of the rotating shaft and the generator assembly, causing it to constantly extend and wobble, which would make the vibration damping effect unstable and affect the vibration reduction and noise reduction effect. The extension and retraction adjustment of the bidirectional electric telescopic rod pushes the rounded corner side plate to ensure that the built-in rollers are always in close contact with the surface of the generator assembly. This prevents the rounded corner side plate, which is elastically connected to the vibration damping spring, from being affected by vibration and wobble and losing close contact with the generator assembly, resulting in poor integrated vibration damping effect. Multiple built-in ball bearings are installed on the side of the rounded corner side plate near the generator assembly to reduce wear noise during rotational contact. This prevents the rounded corner side plate from generating large friction noise due to pressure when it is in close contact with the surface of the generator assembly. Built-in ball bearings are installed on one side of the rounded corner side plate to isolate the rounded corner side plate from the generator assembly, preventing the rounded corner side plate from being continuously worn and damaged by frictional rotational contact with the surface of the generator assembly due to pressure over a long period of time.

[0009] 4. The noise reduction device of this wind turbine is equipped with an interception and protection mechanism. A hard arc brush is installed on the outer side of the long cylindrical rod to clean the blade surface, preventing debris from easily accumulating on the curved blade surface after prolonged use and obstructing the airflow, thus reducing the blade's efficiency in absorbing wind energy. An arc-shaped baffle is installed on one side of the long connecting plate, located on the inclined surfaces of both sides of the blade, to block the debris cleaned by the hard arc brush, ensuring that the debris can only be discharged towards the second ring frame. This prevents the cleaned debris from being pushed by the wind and falling onto the curved baffle and accumulating on the curved baffle, concave sound-absorbing cotton, and concave sound-absorbing cotton. The problem of the sound-absorbing material between the two is difficult to handle. By setting a first ring frame, a second ring frame, and a third ring frame on the side of the blade that receives wind energy, blocky debris in the wind is intercepted and protected. This prevents large blocky debris in the wind from directly impacting the blade when the wind is strong, which would cause the blade to be gradually damaged by the impact force. By setting the edges of the first, second, and third ring frames to be rounded, the wind can pass through more smoothly and come into contact with the blade. This prevents some of the wind blowing towards the blade from hitting the plane when it comes into contact with the first, second, and third ring frames, which would cause convection and make it difficult to pass smoothly, thus affecting the wind's driving effect on the blade. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the noise reduction device of the present invention; Figure 2 This is a side sectional view of the noise reduction device of the present invention; Figure 3 This is a side sectional view of the noise reduction mechanism of the present invention; Figure 4This is a partial side-section diagram of the noise reduction mechanism of the present invention; Figure 5 This is a schematic diagram of the shock absorption mechanism of the present invention; Figure 6 This is a schematic diagram of the second shock absorption mechanism of the present invention; Figure 7 This is a schematic diagram of the interception and protection mechanism of the present invention; Figure 8 This is a schematic diagram of the side structure of the interception and protection mechanism of the present invention.

[0011] In the diagram: 1. Rotating shaft; 2. Generator assembly; 3. Noise reduction mechanism; 4. Vibration damping mechanism; 5. Circular connecting plate; 6. Blade; 7. Interception and protection mechanism; 301. Fixed circular plate; 302. Curved baffle; 303. Circular sleeve plate; 304. Concave sound-absorbing cotton one; 305. Concave sound-absorbing cotton two; 401. Connecting ring plate; 402. Vibration damping spring; 403. Rounded corner side plate; 404. Two-way electric telescopic rod; 405. Built-in ball bearing; 701. Connecting circular plate; 702. Long round rod; 703. Hard arc brush; 704. Long connecting plate; 705. Arc-shaped baffle; 706. First ring frame; 707. Second ring frame; 708. Third ring frame. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Please see Figures 1-4 The present invention provides a noise reduction device for a wind turbine, including a rotating shaft 1, one end of the rotating shaft 1 is rotatably connected to a generator assembly 2 via a rotating bolt, a noise reduction mechanism 3 is fixedly connected to the outside of the generator assembly 2, a shock absorption mechanism 4 is fixedly connected to the outside of the rotating shaft 1, a circular connecting plate 5 is fixedly connected to the end of the rotating shaft 1 away from the generator assembly 2, a blade 6 is fixedly connected to the outside of the circular connecting plate 5, and an interception and protection mechanism 7 is rotatably connected to the side of the circular connecting plate 5 away from the rotating shaft 1 via a rotating bolt. The noise reduction mechanism 3 includes a fixed circular plate 301, a curved baffle 302 is fixedly connected to one side of the fixed circular plate 301, and a circular sleeve plate 303 is fixedly connected to the side of the curved baffle 302 away from the fixed circular plate 301. The noise reduction mechanism 3 is mounted on the rotating shaft 1 and is rotatably connected to the rotating shaft 1 through a bearing. The side of the shock absorption mechanism 4 away from the generator assembly 2 is rotatably connected to the side of the noise reduction mechanism 3 through a bearing. The side of the circular connecting plate 5 close to the rotating shaft 1 is rotatably connected to the side of the noise reduction mechanism 3 through a bearing. The circular sleeve 303 is sleeved on the rotating shaft 1 and is rotatably connected to the rotating shaft 1 through a bearing. The side of the circular sleeve 303 near the curved baffle 302 is rotatably connected to the side of the shock absorption mechanism 4 through a bearing. The side of the circular sleeve 303 away from the curved baffle 302 is rotatably connected to the side of the circular connecting plate 5 through a bearing. The side of the fixed circular plate 301 near the curved baffle 302 is fixedly connected to one side of the generator assembly 2. Multiple curved baffles 302 are provided, and the multiple curved baffles 302 are distributed in a circle between the fixed circular plate 301 and the circular sleeve plate 303. A concave sound-absorbing cotton 304 is fixedly connected to the side of the fixed circular plate 301 near the curved baffle 302, and a concave sound-absorbing cotton 305 is fixedly connected to the side of the fixed circular plate 301 near the curved baffle 302. Concave sound-absorbing cotton 304 is fixedly connected to one side of the circular sleeve plate 303 on the side away from the fixed circular plate 301. Concave sound-absorbing cotton 305 is fixedly connected to one side of the circular sleeve plate 303 on the side away from the fixed circular plate 301. Multiple concave sound-absorbing cotton 304s are provided, and the multiple concave sound-absorbing cotton 304s are circumferentially distributed between the fixed circular plate 301 and the circular sleeve plate 303 and are parallel and aligned with the concave area of ​​the curved baffle 302. Multiple concave sound-absorbing cotton 305s are provided, and the multiple concave sound-absorbing cotton 305s are circumferentially distributed between the fixed circular plate 301 and the circular sleeve plate 303 and are parallel and aligned with the concave area of ​​the curved baffle 302. The concave areas of the baffle 302 are aligned in parallel. In use, noise reduction mechanism 3 is installed on the outside of the rotating shaft 1 and the generator assembly 2 to intercept and reduce noise waves. The airflow passes through the interception and protection mechanism 7 and contacts the blade 6, pushing the blade 6 to rotate. By setting the interception and protection mechanism 7 on the side of the blade 6 that receives wind force, blocky debris in the wind is blocked and intercepted, thus protecting the blade 6. The blade 6 is driven by the wind force to rotate the rotating shaft 1, converting wind energy into mechanical energy. When the rotating shaft 1 rotates, the mechanical energy is converted into electrical energy through the generator assembly 2. At the same time, the rotation of the rotating shaft 1 drives the generator assembly 2 to generate electrical energy. The outer shock absorption mechanism 4 rotates together. By setting the shock absorption mechanism 4 on the outside of the rotating shaft 1, which is fixedly connected to the rotating shaft 1 and rotates in contact with the generator assembly 2, the amplitude generated when the rotating shaft 1 and the generator assembly 2 are working is reduced, thereby reducing noise. When the noise generated when the engine assembly and the rotating shaft 1 are working, the sound waves first come into contact with the concave sound-absorbing cotton 304 for the first step of sound absorption treatment, and then enter the area between the concave sound-absorbing cotton 304 and the curved baffle 302. When the sound waves propagate between the concave sound-absorbing cotton 304 and the curved baffle 302, they will come into contact with the concave sound-absorbing cotton 305 for further sound absorption. Secondary noise reduction is achieved by surrounding the generator assembly 2 with multiple curved baffles 302 on its outer side to block and reduce noise. The curved baffles 302 on the outer side of the generator assembly 2 block noise while facilitating air flow. The concave sound-absorbing cotton 1 304 and concave sound-absorbing cotton 2 305 on the inner side of the curved baffles 302 provide full contact noise reduction for the continuously propagating noise waves. The area covered by the curved baffles 302 is filled by placing concave sound-absorbing cotton 1 304 and concave sound-absorbing cotton 2 305 on the curved path inside the curved baffles 302.

[0014] Please see Figures 1-8This invention provides a noise reduction device for a wind turbine: a vibration damping mechanism 4 includes a docking ring plate 401, a vibration damping spring 402 fixedly connected to one side of the docking ring plate 401, a rounded corner side plate 403 fixedly connected to the end of the vibration damping spring 402 away from the docking ring plate 401, a bidirectional electric telescopic rod 404 fixedly connected to the side of the rounded corner side plate 403 near the vibration damping spring 402, and an internal ball bearing 405 rotatably connected to the side of the rounded corner side plate 403 away from the vibration damping spring 402 via a bearing. The docking ring plate 401 is sleeved on a rotating shaft 1 and fixedly connected to the rotating shaft 1. The side of plate 401 away from the shock-absorbing spring 402 is rotatably connected to the side of circular sleeve plate 303 via a bearing. The rounded corner side plate 403 is sleeved on the rotating shaft 1 and fixedly connected to the rotating shaft 1. Multiple shock-absorbing springs 402 are provided, and the multiple shock-absorbing springs 402 are circumferentially distributed between the docking ring plate 401 and the rounded corner side plate 403. Multiple bidirectional electric telescopic rods 404 are provided, and the multiple bidirectional electric telescopic rods 404 are respectively provided inside the shock-absorbing springs 402. Multiple built-in ball bearings 405 are provided, and the multiple built-in ball bearings 405 are circumferentially distributed on one side of the rounded corner side plate 403. The interception and protection mechanism 7 includes a docking circular plate 701. A long circular rod 702 is fixedly connected to the outer side of the docking circular plate 701. A hard arc brush 703 is fixedly connected to the outer side of the long circular rod 702. A long connecting plate 704 is fixedly connected to the outer side of the docking circular plate 701. An arc-shaped baffle 705 is fixedly connected to one side of the long connecting plate 704. A first ring frame 706 is fixedly connected to the side of the long connecting plate 704 away from the arc-shaped baffle 705. A second ring frame 707 is fixedly connected to the side of the long connecting plate 704 near the first ring frame 706. A third ring frame 708 is fixedly connected to the side of the long connecting plate 704 near the second ring frame 707. One side of the docking circular plate 701 is rotatably connected to one side of the circular connecting plate 701 via a rotating bolt. Three long circular rods 702 are provided. Multiple long connecting plates 704 are arranged in a circular pattern on the outside of the docking circular plate 701, and are positioned vertically aligned on both sides of the blade plate 6. The radii of the first ring frame 706, the second ring frame 707, and the third ring frame 708 increase sequentially. In use, when the rotating shaft 1 rotates, the outer docking ring plate 401 drives the entire damping mechanism 4 to rotate together. Multiple damping springs 402 are arranged between the docking ring plate 401 and the rounded corner side plate 403 to dampen the rotating shaft 1 and the generator assembly 2. A bidirectional electric telescopic rod 404 is arranged between the docking ring plate 401 and the rounded corner side plate 403, located inside the damping springs 402, to extend and retract the damping springs 402 to their maximum position. In optimal elasticity, the bidirectional electric telescopic rod 404 extends and adjusts to push the rounded corner side plate 403, ensuring that the built-in rollers are always in close contact with the surface of the generator assembly 2. Multiple built-in ball bearings 405 are placed on the side of the rounded corner side plate 403 closest to the generator assembly 2 to reduce wear noise during rotational contact. The built-in ball bearings 405 on one side of the rounded corner side plate 403 also directly separate it from the generator assembly 2. Wind power passes through the first ring frame 706, the second ring frame 707, and the third ring frame 708, contacting the blade 6 and pushing it to rotate the rotating shaft 1 via the circular connecting plate 5. When the circular connecting plate 5 rotates, the interception and protection mechanism 7 on the side furthest from the rotating shaft 1 is relatively heavy and will not rotate with the circular connecting plate. As the blade 5 rotates together, the surface of the blade 6 comes into frictional contact with the hard arc brush 703 when the circular connecting plate 5 rotates. The hard arc brush 703 is set on the outside of the long round rod 702 to clean the surface of the blade 6. The arc-shaped baffle 705 is set on one side of the long connecting plate 704 at the position on both sides of the blade 6 to block the debris cleaned by the hard arc brush 703, so that the debris can only be discharged in the direction of the second ring frame 707. The first ring frame 706, the second ring frame 707 and the third ring frame 708 are set on the side of the blade 6 that receives wind energy to block and protect the blocky debris in the wind. The edges of the first ring frame 706, the second ring frame 707 and the third ring frame 708 are set to rounded corners to make the wind pass through more smoothly and contact the blade 6.

[0015] In operation, this invention uses a noise reduction mechanism 3 to intercept and reduce noise waves by fitting a noise reduction mechanism 3 around the rotating shaft 1 and the generator assembly 2. Airflow passes through the interception and protection mechanism 7 and contacts the blade 6, causing the blade 6 to rotate. The interception and protection mechanism 7, located on the side of the blade 6 receiving wind force, blocks and intercepts debris in the wind, thus protecting the blade 6. The blade 6, driven by wind force, rotates the rotating shaft 1, converting wind energy into mechanical energy. As the rotating shaft 1 rotates, the generator assembly 2 converts the mechanical energy into electrical energy. Simultaneously, the rotation of the rotating shaft 1 causes the outer shock-absorbing mechanism 4 to rotate as well. The shock-absorbing mechanism 4, fixedly connected to the rotating shaft 1 and in rotational contact with the generator assembly 2, reduces the impact of the wind on the rotating shaft 1 and the generator assembly 2. The vibration amplitude generated when generator assembly 2 is working reduces noise. When the noise generated by the engine assembly and rotating shaft 1 is working, the sound waves first come into contact with the concave sound-absorbing cotton 304 for the first stage of noise reduction, and then enter the area between the concave sound-absorbing cotton 304 and the curved baffle 302. When the sound waves propagate between the concave sound-absorbing cotton 304 and the curved baffle 302, they come into contact with the concave sound-absorbing cotton 305 for secondary noise reduction. By setting multiple curved baffles 302 on the outside of generator assembly 2 to surround it, the sound waves are blocked and noise is reduced. By setting the curved baffles 302 with a tortuous shape on the outside of generator assembly 2 to block noise while facilitating air flow, the concave sound-absorbing cotton 304 and the concave sound-absorbing cotton 305 are placed on the inside of the curved baffle 302. The second type of sound-absorbing cotton 305 is used to fully contact and absorb the continuously propagating noise waves. Concave sound-absorbing cotton 304 and concave sound-absorbing cotton 305 are placed on the curved path inside the curved baffle 302 to fill the area covered by the curved baffle 302. When the rotating shaft 1 rotates, the outer docking ring plate 401 drives the entire shock-absorbing mechanism 4 to rotate together. Multiple shock-absorbing springs 402 are placed between the docking ring plate 401 and the rounded corner side plate 403 to reduce vibration and noise in the rotating shaft 1 and generator assembly 2. A bidirectional electric telescopic rod 404 is placed between the docking ring plate 401 and the rounded corner side plate 403, located inside the shock-absorbing spring 402, to adjust the shock-absorbing spring 402 to its optimal elasticity. The telescopic adjustment of the electric telescopic pole 404 pushes the rounded corner side plate 403 to ensure that the built-in rollers are always in close contact with the surface of the generator assembly 2. By setting multiple built-in ball bearings 405 on the side of the rounded corner side plate 403 near the generator assembly 2 to make rolling contact with the generator assembly 2, wear noise during rotational contact is reduced. By setting built-in ball bearings 405 on one side of the rounded corner side plate 403, the rounded corner side plate 403 is directly separated from the generator assembly 2 and disengaged. The wind passes through the first ring frame 706, the second ring frame 707 and the third ring frame 708 and contacts the blade 6, pushing the blade 6 to drive the rotating shaft 1 to rotate through the circular connecting plate 5. When the circular connecting plate 5 rotates, the interception and protection mechanism 7 on the side away from the rotating shaft 1 is heavier and will not rotate with the circular connecting plate 5.As the circular connecting plate 5 rotates, the surface of the blade 6 comes into frictional contact with the hard arc brush 703. The hard arc brush 703, located on the outer side of the long cylindrical rod 702, cleans the surface of the blade 6. Arc-shaped baffles 705, positioned on one side of the long connecting plate 704 at the inclined surfaces on both sides of the blade 6, block the debris removed by the hard arc brush 703, ensuring that the debris can only be discharged towards the second ring frame 707. First ring frames 706, second ring frames 707, and third ring frames 708, located on the side of the blade 6 that receives wind energy, provide a protective barrier against clump-shaped debris in the wind. The rounded edges of the first ring frames 706, second ring frames 707, and third ring frames 708 allow the wind to pass through more smoothly and contact the blade 6.

[0016] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A noise reduction device for a wind turbine, comprising a rotating shaft (1), characterized in that: One end of the rotating shaft (1) is rotatably connected to the generator assembly (2) via a rotating bolt. A noise reduction mechanism (3) is fixedly connected to the outside of the generator assembly (2). A shock absorption mechanism (4) is fixedly connected to the outside of the rotating shaft (1). A circular connecting plate (5) is fixedly connected to the end of the rotating shaft (1) away from the generator assembly (2). A blade plate (6) is fixedly connected to the outside of the circular connecting plate (5). An interception and protection mechanism (7) is rotatably connected to the side of the circular connecting plate (5) away from the rotating shaft (1) via a rotating bolt. The noise reduction mechanism (3) includes a fixed circular plate (301), a curved baffle (302) is fixedly connected to one side of the fixed circular plate (301), and a circular sleeve plate (303) is fixedly connected to the side of the curved baffle (302) away from the fixed circular plate (301).

2. The noise reduction device for a wind turbine generator according to claim 1, characterized in that: The noise reduction mechanism (3) is sleeved on the rotating shaft (1) and rotatably connected to the rotating shaft (1) through a bearing. The side of the shock absorption mechanism (4) away from the generator assembly (2) is rotatably connected to the side of the noise reduction mechanism (3) through a bearing. The side of the circular connecting plate (5) close to the rotating shaft (1) is rotatably connected to the side of the noise reduction mechanism (3) through a bearing.

3. The noise reduction device for a wind turbine generator according to claim 1, characterized in that: The circular sleeve (303) is sleeved on the rotating shaft (1) and rotatably connected to the rotating shaft (1) through a bearing. The side of the circular sleeve (303) near the curved baffle (302) is rotatably connected to the side of the shock absorption mechanism (4) through a bearing. The side of the circular sleeve (303) away from the curved baffle (302) is rotatably connected to the side of the circular connecting plate (5) through a bearing.

4. The noise reduction device for a wind turbine generator according to claim 1, characterized in that: The fixed circular plate (301) is fixedly connected to one side of the generator assembly (2) on the side near the curved baffle (302). Multiple curved baffles (302) are provided, and the multiple curved baffles (302) are circumferentially distributed between the fixed circular plate (301) and the circular sleeve plate (303).

5. The noise reduction device for a wind turbine generator according to claim 1, characterized in that: A concave sound-absorbing cotton 1 (304) is fixedly connected to the side of the fixed circular plate (301) near the curved baffle (302), and a concave sound-absorbing cotton 2 (305) is fixedly connected to the side of the fixed circular plate (301) near the curved baffle (302).

6. The noise reduction device for a wind turbine generator according to claim 5, characterized in that: The concave sound-absorbing cotton one (304) is fixedly connected to the side of the circular sleeve plate (303) on the side away from the fixed circular plate (301). The concave sound-absorbing cotton two (305) is fixedly connected to the side of the circular sleeve plate (303) on the side away from the fixed circular plate (301). Multiple concave sound-absorbing cotton one (304) are provided, and the multiple concave sound-absorbing cotton one (304) are circumferentially distributed between the fixed circular plate (301) and the circular sleeve plate (303) and are parallel and aligned with the concave area of ​​the curved baffle (302). Multiple concave sound-absorbing cotton two (305) are provided, and the multiple concave sound-absorbing cotton two (305) are circumferentially distributed between the fixed circular plate (301) and the circular sleeve plate (303) and are parallel and aligned with the concave area of ​​the curved baffle (302).

7. The noise reduction device for a wind turbine generator according to claim 1, characterized in that: The shock absorption mechanism (4) includes a docking ring plate (401), a shock absorption spring (402) is fixedly connected to one side of the docking ring plate (401), a rounded corner side plate (403) is fixedly connected to the end of the shock absorption spring (402) away from the docking ring plate (401), a bidirectional electric telescopic rod (404) is fixedly connected to the side of the rounded corner side plate (403) close to the shock absorption spring (402), and an internal ball bearing (405) is rotatably connected to the side of the rounded corner side plate (403) away from the shock absorption spring (402).

8. The noise reduction device for a wind turbine generator according to claim 7, characterized in that: The docking ring plate (401) is sleeved on the rotating shaft (1) and fixedly connected to the rotating shaft (1). The side of the docking ring plate (401) away from the shock-absorbing spring (402) is rotatably connected to the side of the circular sleeve plate (303) through a bearing. The rounded corner side plate (403) is sleeved on the rotating shaft (1) and fixedly connected to the rotating shaft (1). Multiple shock-absorbing springs (402) are provided, and the multiple shock-absorbing springs (402) are circumferentially distributed between the docking ring plate (401) and the rounded corner side plate (403). Multiple bidirectional electric telescopic rods (404) are provided, and the multiple bidirectional electric telescopic rods (404) are respectively provided inside the shock-absorbing springs (402). Multiple built-in balls (405) are provided, and the multiple built-in balls (405) are circumferentially distributed on one side of the rounded corner side plate (403).

9. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: The interception and protection mechanism (7) includes a docking circular plate (701), a long round rod (702) is fixedly connected to the outside of the docking circular plate (701), a hard arc brush (703) is fixedly connected to the outside of the long round rod (702), a long connecting plate (704) is fixedly connected to the outside of the docking circular plate (701), an arc-shaped baffle (705) is fixedly connected to one side of the long connecting plate (704), a first ring frame (706) is fixedly connected to the side of the long connecting plate (704) away from the arc-shaped baffle (705), a second ring frame (707) is fixedly connected to the side of the long connecting plate (704) close to the first ring frame (706), and a third ring frame (708) is fixedly connected to the side of the long connecting plate (704) close to the second ring frame (707).

10. A noise reduction device for a wind turbine generator according to claim 9, characterized in that: One side of the docking circular plate (701) is rotatably connected to one side of the circular connecting plate (5) by a rotating bolt. Three long round rods (702) are provided, and the three long round rods (702) are distributed in a circle on the outside of the docking circular plate (701). Multiple long connecting plates (704) are provided, and the multiple long connecting plates (704) are distributed on the outside of the docking circular plate (701) at a position that is vertically aligned with both sides of the blade plate (6). The radii of the first ring frame (706), the second ring frame (707), and the third ring frame (708) are set to increase sequentially.

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