A vibrating device and an ice protection wind turbine blade

Abstract

The application discloses a vibrating device and an anti-icing wind power blade, and belongs to the technical field of wind power blade anti-icing devices. The vibrating device comprises a mounting shell with a cavity fixed on the blade, a knocking assembly and a swinging assembly are arranged on the two sides of the cavity respectively, the two assemblies are connected through a transmission assembly, the swinging assembly generates relative rotation with the mounting shell by gravity when the blade rotates, and serves as the only power source to drive the knocking assembly to rotate, periodically impact a plurality of vibrating assemblies arranged circumferentially on the inner side of the mounting shell to generate high-frequency vibration, and form composite vibration by cooperating with low-frequency shaking generated by the centrifugal inertia of the knocking assembly, so that the composite vibration is transmitted to the surface of the blade to realize anti-icing and deicing. The vibrating device and the anti-icing wind power blade do not need any external energy source, have low failure rate due to a pure mechanical structure, can be arranged flexibly according to the icing risk of the blade, do not change the aerodynamic shape of the blade, have good anti-icing effect, and have low maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, and more particularly to a vibration device and an anti-icing wind turbine blade incorporating the vibration device. Background Technology

[0002] Wind turbine blades are one of the core components of wind turbine generators, and their aerodynamic performance and structural integrity directly determine the generator's power generation efficiency and operational safety. However, in cold and humid environments, frost easily condenses on the surface of wind turbine blades. The accumulation of ice can severely damage the aerodynamic shape of the blades, significantly increase their weight, and not only lead to a significant decrease in power generation efficiency, but also cause eccentric loads due to uneven ice distribution, resulting in blade fatigue damage, breakage, and even instability and shutdown of the entire generator set, leading to huge economic losses and safety hazards.

[0003] Currently, wind turbine blade anti-icing technologies are mainly divided into two categories: active anti-icing and passive anti-icing. Active anti-icing technologies, represented by electric heating and hot airflow anti-icing, require additional heating elements to be laid inside or on the surface of the blade, as well as complex power supply and control systems. This not only results in high energy consumption, significantly increasing the operating costs of wind farms, but also significantly increases the overall weight of the blades, disrupting their original aerodynamic balance. Furthermore, the complex electrical systems have a high failure rate in low-temperature and high-humidity environments, making installation and maintenance difficult and costly, and posing safety hazards such as leakage and short circuits. Passive anti-icing technologies mainly rely on surface anti-icing coatings, which reduce ice adhesion by lowering surface energy. However, these coatings have limited anti-icing effectiveness, only delaying light icing and completely unable to cope with severe icing scenarios such as freezing rain and blizzards. Moreover, the coatings are easily worn, aged, and peeled off under repeated exposure to wind, sand, ultraviolet radiation, and ice, requiring periodic shutdowns for repainting, resulting in high long-term costs and impacting the continuous operation time of wind farms.

[0004] In summary, existing anti-icing technologies generally suffer from drawbacks such as high energy consumption, structural redundancy, cumbersome maintenance, poor reliability, narrow applicability, and high long-term costs. Summary of the Invention

[0005] The purpose of this invention is to provide a vibration device and an anti-icing wind turbine blade that utilizes the gravitational potential energy of the blade's own rotation through a purely mechanical structure to achieve anti-icing and de-icing without any external energy input, thereby solving the aforementioned technical problems existing in the prior art. The specific technical solution is as follows: A vibration device for wind turbine blade anti-icing includes a mounting shell with a cavity fixedly mounted on the blade, a striking component and a rotating component respectively disposed on the inner and outer sides of the cavity, and a transmission component connecting the swing component and the striking component. The swing component is used to generate relative rotation between the swing component and the mounting shell by gravity during the rotation of the blade. Multiple vibration components are arranged circumferentially on the inner side of the mounting shell so that the swing component drives the striking component to rotate and periodically impact the vibration component.

[0006] Furthermore, the transmission assembly includes a rotating shaft passing through the mounting housing, and the oscillating assembly includes a pendulum, a first rotating sleeve disposed on the end of the rotating shaft away from the blade, and a swing arm connecting the first rotating sleeve and the pendulum.

[0007] Furthermore, the mounting housing includes a disc-shaped bonding plate connected to the blade, a rotating shaft passing through the center of the bonding plate, and a swing arm with a length greater than the radius of the bonding plate.

[0008] Furthermore, it also includes a core housing disposed on the side of the mounting housing facing away from the blade. The transmission assembly also includes a drive gear sleeved on the rotating shaft, a transmission gear set rotatably disposed inside the core housing and meshing with the drive gear, and a driven gear rotatably sleeved on the rotating shaft and located on the side of the drive gear facing the blade. The driven gear meshes with the transmission gear set and is fixedly connected to the striking assembly. The drive gear, transmission gear set and driven gear constitute a multi-stage acceleration transmission mechanism for converting the low-speed relative rotation of the first rotating sleeve into the high-speed rotation of the driven gear.

[0009] Furthermore, the striking assembly includes a second rotating sleeve sleeved on the rotating shaft and fixedly connected to the driven gear, and at least one rotating arm fixedly disposed radially on the outer wall of the second rotating sleeve, with a striking head fixedly disposed at the end of the rotating arm.

[0010] Furthermore, each vibration assembly includes a spring plate arranged radially along the mounting housing, a counterweight block disposed on the end of the spring plate near the striking head, a vibrating block disposed on the end of the spring plate away from the striking head, and a support shaft disposed on the side of the spring plate near the vibrating block, the support shaft being fixedly disposed on the mounting housing.

[0011] Furthermore, the mounting housing also includes a first cover corresponding to the bonding plate, and the vibration assembly also includes a support frame disposed on the first cover. The support frame is located between the support shaft and the counterweight, and the spring plate is embedded in the support frame to limit the circumferential rotation of the spring plate.

[0012] Furthermore, there is a gap between the spring sheet and the support frame.

[0013] An anti-icing wind turbine blade includes the aforementioned vibration device, with multiple vibration devices arranged at intervals along the length and / or circumferential direction of the blade.

[0014] Furthermore, the mounting housing of the vibration device is fixed to the inner or outer surface of the blade.

[0015] The vibration device and anti-icing wind turbine blade of the present invention have the following advantages: 1. By generating power through the combined action of the blade's own rotation and the gravity of the oscillating component, the fully automatic passive operation of anti-icing is achieved by rotating the blade. At the same time, the mechanical vibration generated by the periodic impact of the striking component on the vibration component directly acts on the ice layer. The anti-icing principle is direct and efficient, and the overall structure has a high degree of modularity, making it easy to promote and apply on wind turbine blades of different specifications.

[0016] 2. The use of a rotating shaft as a unified support reference ensures the coaxiality and stability of power transmission. The combination structure of the pendulum, swing arm, and rotating sleeve is simple and reliable. It utilizes the gravitational potential energy of the pendulum to continuously output stable torque, generating sufficient relative rotational force even in weak wind conditions with low-speed blade rotation. This ensures that the device can start stably and work continuously under various wind conditions, avoiding anti-icing failure due to insufficient power.

[0017] 3. The tight fit between the bonding plate and the blade surface ensures efficient transmission of vibration energy, while the design of the swing arm length being greater than the radius of the bonding plate avoids motion interference between the pendulum and the side wall of the mounting housing, ensuring that the swing assembly can always maintain a vertically downward posture and provide a continuous and stable power input for the entire device.

[0018] 4. Through a rationally designed multi-stage gear transmission mechanism, the small-amplitude, low-speed relative rotation between the swing arm and the mounting housing is transformed into a large-amplitude, high-speed rotation of the striking component, increasing the striking frequency and vibration intensity, and ensuring the anti-icing effect. Simultaneously, the independently designed core housing isolates the transmission components from the external environment, effectively preventing the intrusion of dust and moisture, reducing gear corrosion and wear, extending the service life of the transmission system, and reducing maintenance frequency.

[0019] 5. The combination of a rotating sleeve, rotating arm, and striking head results in a simple and compact structure with direct and efficient power transmission. The striking head increases the impact area, making the force more even, reducing stress concentration during impact, and effectively extending the service life of the striking head and vibration components.

[0020] 6. A spring sheet is used as an elastic vibration element, which, together with a counterweight and a vibrating block, forms a highly efficient vibration amplification system. When the striking head strikes the counterweight, the spring sheet generates elastic vibration with the support shaft as the fulcrum. The inertia of the counterweight prolongs the vibration time, while the vibrating block further amplifies the vibration amplitude and range, enabling the vibration to be transmitted more evenly to the blade surface, thereby improving the efficiency and coverage area of ​​anti-icing and de-icing. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of the anti-icing wind turbine blade of the present invention.

[0022] Figure 2 This is a schematic diagram of the swing component and mounting housing in the vibration device of the present invention.

[0023] Figure 3 This is a schematic diagram of the striking component and the vibration component in the vibration device of the present invention.

[0024] Figure 4 This is a schematic diagram of the transmission component and the swing component in the vibration device of the present invention.

[0025] Figure 5 This is a schematic diagram of the vibration component and transmission component in the vibration device of the present invention.

[0026] Figure 6 This is an enlarged view of the vibration component in the vibration device of the present invention. Detailed Implementation

[0027] To better understand the purpose, structure, and function of this invention, the vibration device and anti-icing wind turbine blade of this invention will be described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 6 As shown, the present invention provides a vibration device for anti-icing of wind turbine blade 1, including a mounting shell 2 fixedly mounted on the blade 1. The mounting shell 2 adopts a disc-shaped chamber structure. The disc-shaped structure can make the internal components evenly stressed, avoid local stress concentration, and facilitate installation in close contact with the surface of the blade 1. A striking component 6 and a swinging component 3 are respectively provided on the inner and outer sides of the chamber of the mounting shell 2, and the two are connected by a transmission component to transmit power.

[0029] When blade 1 rotates under wind power, mounting shell 2 rotates synchronously with blade 1, while the oscillating component 3 remains vertically downward under its own weight, thus creating relative rotation between the oscillating component 3 and the mounting shell 2, which rotates with blade 1. This relative rotation serves as the sole power source for the entire device, and after being transmitted and amplified by the transmission component, it drives the striking component 6 to rotate at high speed. Multiple vibration components 7 are arranged circumferentially on the inner side of the mounting shell 2. The high-speed rotating striking component 6 periodically impacts these vibration components 7, causing them to vibrate at high frequency. Simultaneously, the centrifugal inertia generated by the high-speed rotation of the striking component 6 causes the mounting shell 2 to oscillate at low frequency. The high-frequency vibration and low-frequency oscillation superimpose to form a composite vibration, which is transmitted to the surface of blade 1 through the mounting shell 2, which is in close contact with blade 1. This composite vibration can both disrupt the conditions for water droplet condensation, preventing water mist from freezing on the surface of blade 1, and also crack the thin ice that has already formed. Combined with the centrifugal force generated by the rotation of blade 1, it causes the ice layer to fall off, making it suitable for different icing scenarios from light to moderate.

[0030] The transmission assembly includes a rotating shaft 14 that passes through the mounting housing 2. The rotating shaft 14 serves as the support for the entire transmission system, providing a stable rotational reference for each rotating component. The oscillating assembly 3 specifically includes a pendulum 12, a first rotating sleeve 13, and a swing arm 11. The first rotating sleeve 13 is rotatably fitted onto the end of the rotating shaft 14 away from the blade 1. One end of the swing arm 11 is fixedly connected to the first rotating sleeve 13, and the other end is fixedly connected to the pendulum 12. The pendulum 12 is made of high-density material, which can provide sufficient gravitational torque to ensure that sufficient relative rotational force is generated even when the blade 1 rotates at low speed. Even under conditions of weak wind and low blade speed, it can stably drive the entire device to operate.

[0031] The mounting housing 2 further includes a disc-shaped bonding plate 4 connected to the blade 1, a first cover 8 corresponding to the bonding plate 4, and a first sidewall connecting the first cover 8 and the bonding plate 4. The bonding plate 4 adopts an arc-shaped structure adapted to the curvature of the blade 1 surface, which can seamlessly and tightly fit the blade 1 surface, minimizing energy loss during vibration transmission. The rotating shaft 14 passes through the center of the bonding plate 4 to ensure the coaxiality of the entire transmission system and reduce frictional loss during rotation. The length of the swing arm 11 is greater than the radius of the bonding plate 4 to ensure that the pendulum 12 will not interfere with the sidewall of the mounting housing 2 during rotation, thereby ensuring that the swing assembly 3 can always remain vertical and stably output power.

[0032] To protect the transmission components and optimize the spatial layout, a core housing 5 is also fixedly installed on the side of the mounting housing 2 facing away from the blade 1. The transmission assembly also includes a drive gear 9 fixed on the first rotating sleeve 13, a transmission gear set 10 rotatably disposed inside the core housing 5 and meshing with the drive gear 9, and a driven gear 18 rotatably sleeved on the rotating shaft 14 and located on the side of the drive gear 9 facing the blade 1. The drive gear 9, transmission gear set 10, and driven gear 18 are all housed inside the core housing 5. The core housing 5 can effectively block external contaminants such as dust and moisture from entering the transmission system, prevent gear corrosion and wear, and extend the service life of the transmission components.

[0033] One end of the rotating shaft 14 passes through the first cover 8 and extends into the inner housing 5. The first rotating sleeve 13 is rotatably fitted onto the end of the rotating shaft 14 near the inner housing 5. The driven gear 18 meshes with the transmission gear set 10 and is fixedly connected to the striking assembly 6. The driving gear 9, the transmission gear set 10, and the driven gear 18 together constitute a multi-stage acceleration transmission mechanism. By reasonably setting the gear ratio of each gear, the low-speed relative rotation of the first rotating sleeve 13 can be converted into the high-speed rotation of the driven gear 18. For example, when the blade 1 rotates once, the swing arm 11 and the mounting housing 2 generate a 360-degree relative rotation. After acceleration by two stages of gears, the driven gear 18 can achieve a high-speed rotation of tens or even hundreds of revolutions, thereby providing sufficient striking frequency for the striking assembly 6 and ensuring that the number of vibrations per unit time is sufficient to prevent ice formation.

[0034] The striking assembly 6 specifically includes a second rotating sleeve 15 sleeved on the rotating shaft 14 and fixedly connected to the driven gear 18, and at least one rotating arm 16 radially fixed on the outer wall of the second rotating sleeve 15. A cylindrical striking head 17 is fixedly provided at the end of the rotating arm 16. The cylindrical structure allows for a larger impact surface of the striking head 17, resulting in more uniform force distribution and effectively reducing stress concentration during impact, thus extending its service life. When the second rotating sleeve 15 rotates at high speed with the driven gear 18, the striking head 17 sequentially strikes multiple vibration components 7 spaced circumferentially, generating a continuous and uniform striking force. In practical applications, the number of rotating arms 16 can be set to 2-4 as needed, and evenly distributed along the circumference of the second rotating sleeve 15 to further improve the frequency and uniformity of the striking.

[0035] Each vibration assembly 7 includes a rectangular spring plate 19 arranged radially along the mounting housing 2. A cylindrical counterweight 20 is fixedly attached to one end of the spring plate 19 near the striking head 17, and a columnar vibrating block 21 is fixedly attached to the other end away from the striking head 17. A columnar support shaft 22 passes through the side of the spring plate 19 near the vibrating block 21. The support shaft 22 is fixedly mounted on the mounting housing 2, and one end of it is fixedly connected to the first cover 8. The support shaft 22 provides stable support for the spring plate 19, enabling it to perform elastic vibration with the support shaft 22 as the fulcrum.

[0036] The axes of the striking head 17, counterweight 20, support shaft 22, and vibrating block 21 are all parallel to the axis of the rotating shaft 14. The diameter of the counterweight 20 is larger than the diameter of the vibrating block 21. This arrangement ensures that when the striking head 17 strikes the counterweight 20, the direction of the impact force is consistent with the vibration direction of the spring plate 19, maximizing the conversion of impact energy into the vibration energy of the spring plate 19. When the striking head 17 strikes the counterweight 20, the spring plate 19 undergoes elastic deformation with the support shaft 22 as the fulcrum. The inertia of the counterweight 20 prolongs the vibration time of the spring plate 19, while the vibrating block 21 amplifies the vibration of the spring plate 19 and transmits it to the bonding plate 4, and then to the surface of the blade 1, effectively expanding the vibration amplitude and range, so that the vibration can be evenly transmitted to a larger area of ​​the blade 1 surface.

[0037] To further ensure the operational stability of the vibration components 7, a U-shaped support frame 23 is fixedly provided on the first cover 8 corresponding to the position of each vibration component 7. The support frame 23 is located between the support shaft 22 and the counterweight 20. The support frame 23 includes two clamping parts arranged at corresponding intervals, with an opening at one end facing the blade 1. The spring plate 19 is embedded in the support frame 23. The support frame 23 can effectively restrict the circumferential rotation of the spring plate 19, prevent the spring plate 19 from shifting during long-term vibration, ensure that the orientation of the spring plate 19 remains stable, and ensure that the striking head 17 can accurately strike the counterweight 20, thus ensuring the stability and reliability of the vibration effect.

[0038] A small gap is reserved between the spring plate 19 and the support frame 23 to provide sufficient vibration space for the elastic vibration of the spring plate 19, avoid rigid collision between the spring plate 19 and the support frame 23 when the spring plate 19 vibrates, effectively reduce friction loss and operating noise, and do not affect the limiting effect of the support frame 23 on the circumferential rotation of the spring plate 19.

[0039] This invention also provides an anti-icing wind turbine blade, which allows for the flexible arrangement of multiple vibration devices according to the icing risk in different areas of the blade 1. These vibration devices can be arranged at intervals along the length and / or circumferential direction of the blade 1, with the arrangement density positively correlated with the icing risk of the corresponding area of ​​the blade 1. For example, the leading edge and tip areas of the blade 1 have a higher icing risk due to higher airflow speeds and greater contact with water mist, thus the number of vibration devices can be appropriately increased; while the trailing edge and root areas of the blade 1 have a lower icing risk, thus the number of devices can be reduced. This modular arrangement ensures overall anti-icing effectiveness while minimizing the additional weight of the blade 1, avoiding adverse effects on the aerodynamic performance and structural strength of the blade 1.

[0040] The mounting housing 2 of the vibration device can be fixed to the inner or outer surface of the blade 1 by adhesive bonding or bolt connection. When installed inside the blade 1, it does not change the external aerodynamic shape of the blade 1 at all, avoiding the impact of external structural protrusions on the rotational efficiency of the blade 1. When installed externally, the disc-shaped design of the mounting housing 2 has minimal impact on aerodynamic performance. Both fixing methods are simple to operate and facilitate subsequent maintenance and replacement. All components of the entire device are purely mechanical structures, with no electronic components or vulnerable parts, resulting in a low failure rate. Routine maintenance only requires periodic inspection of fasteners and lubrication of gears, making maintenance costs low. At the same time, the vibration is concentrated only on the icing-prone area of ​​the blade 1 where the vibration device is located, without causing fatigue damage to the main structure of the blade 1, ensuring the long-term stable and safe operation of the blade 1 and the generator set.

[0041] The working principle of the anti-icing wind turbine blade of this invention is to convert the gravitational potential energy of the blade 1's own rotation into mechanical vibration energy, achieving fully automatic passive anti-icing and de-icing through a purely mechanical structure, without any external energy input or electronic control throughout the process. Specifically: When the wind drives the blade 1 to rotate, the vibration device fixed to the blade 1 moves in a circular motion synchronously with the blade 1. At this time, the swing assembly 3 located outside the mounting shell 2, under the gravity of the pendulum 12, always maintains a vertically downward posture and does not rotate synchronously with the mounting shell 2, thus generating a continuous relative rotation between the swing assembly 3 and the mounting shell 2. This relative rotation is the only power source for the entire device. The gravitational torque of the pendulum 12 is transmitted to the drive gear 9 through the first rotating sleeve 13, providing a continuous and stable input torque for the transmission system.

[0042] The transmission system employs a multi-stage gear acceleration mechanism. By rationally setting the gear ratios of the driving gear 9, the transmission gear set 10, and the driven gear 18, the low-speed relative rotation between the swing arm 11 and the mounting housing 2 is amplified in multiple stages. For example, when the blade 1 rotates once, a 360-degree relative rotation occurs between the swing arm 11 and the mounting housing 2. After two stages of gear acceleration, the driven gear 18 can achieve a high-speed rotation of tens or even hundreds of revolutions, thereby converting the weak gravitational potential energy into powerful rotational kinetic energy, driving the striking component 6 to rotate at high speed.

[0043] The high-speed rotating striking assembly 6 drives the striking head 17 to move in a circular motion via the rotating arm 16, sequentially striking multiple vibration assemblies 7 evenly arranged circumferentially inside the mounting shell 2. When the striking head 17 strikes the counterweight 20, the impact force causes the spring plate 19 to elastically deform around the support shaft 22. The inertia of the counterweight 20 further prolongs the vibration time of the spring plate 19, while the vibration block 21 located at the other end of the spring plate 19 amplifies the vibration amplitude and transmits it to the bonding plate 4. At the same time, the asymmetrically arranged striking assembly 6 generates centrifugal inertial force when rotating at high speed, causing the entire mounting shell 2 to vibrate at low frequency.

[0044] The high-frequency impact vibration and the low-frequency centrifugal shaking superimpose to form a composite vibration, which is evenly transmitted to the surface of blade 1 through the bonding plate 4 that is in close contact with the surface of blade 1. This composite vibration can achieve anti-icing and de-icing on two levels: on the one hand, the continuous high-frequency vibration can disrupt the condensation conditions of water droplets on the surface of blade 1, preventing water mist from adhering and forming an ice layer, thus preventing icing at the source; on the other hand, for thin ice that has already formed, the composite vibration can crack the bonding surface between the ice layer and blade 1, and combined with the centrifugal force generated by the rotation of blade 1, the ice layer will automatically fall off, achieving efficient de-icing.

[0045] The entire vibration device operates passively; it starts when blade 1 rotates and shuts off when blade 1 stops, requiring no manual intervention or external control. The modular installation method allows for flexible placement of the device according to the icing risk in different areas of blade 1, ensuring anti-icing effectiveness while minimizing the impact on the aerodynamic performance and structural strength of blade 1. The purely mechanical design ensures high reliability in low-temperature, high-humidity environments, with an extremely low failure rate. Routine maintenance only requires periodic inspection of fasteners and lubrication of gears, significantly reducing the operating costs of the wind farm.

[0046] The terms “above,” “below,” and “within” as used above include the number itself; the terms “exceeding” and “excluding” do not include the number itself.

[0047] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific descriptions herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0048] If the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A vibration device for preventing icing of wind turbine blades, characterized in that, It includes a mounting shell with a cavity fixedly mounted on the blade, a striking component and a rotating component respectively disposed on the inner and outer sides of the cavity, and a transmission component connecting the swing component and the striking component. The swing component is used to generate relative rotation between the swing component and the mounting shell by gravity during the rotation of the blade. Multiple vibration components are arranged circumferentially on the inner side of the mounting shell so that the swing component drives the striking component to rotate and periodically impact the vibration component.

2. The vibration device according to claim 1, characterized in that, The transmission assembly includes a rotating shaft passing through the mounting housing, and the oscillating assembly includes a pendulum, a first rotating sleeve disposed on the end of the rotating shaft away from the blade, and a swing arm connecting the first rotating sleeve and the pendulum.

3. The vibration device according to claim 2, characterized in that, The mounting housing includes a disc-shaped bonding plate connected to the blade, a rotating shaft passing through the center of the bonding plate, and a swing arm with a length greater than the radius of the bonding plate.

4. The vibration device according to claim 2 or 3, characterized in that, It also includes a core housing disposed on the side of the mounting housing facing away from the blade. The transmission assembly includes a drive gear sleeved on the rotating shaft, a transmission gear set rotatably disposed inside the core housing and meshing with the drive gear, and a driven gear rotatably sleeved on the rotating shaft and located on the side of the drive gear facing the blade. The driven gear meshes with the transmission gear set and is fixedly connected to the striking assembly. The drive gear, transmission gear set and driven gear constitute a multi-stage acceleration transmission mechanism for converting the low-speed relative rotation of the first rotating sleeve into the high-speed rotation of the driven gear.

5. The vibration device according to claim 4, characterized in that, The striking assembly includes a second rotating sleeve sleeved on a rotating shaft and fixedly connected to a driven gear, and at least one rotating arm fixedly disposed radially on the outer wall of the second rotating sleeve, with a striking head fixedly disposed at the end of the rotating arm.

6. The vibration device according to claim 5, characterized in that, Each vibration assembly includes a spring plate arranged radially along the mounting housing, a counterweight block disposed on the end of the spring plate near the striking head, a vibrating block disposed on the end of the spring plate away from the striking head, and a support shaft disposed on the side of the spring plate near the vibrating block, the support shaft being fixedly mounted on the mounting housing.

7. The vibration device according to claim 6, characterized in that, The mounting housing also includes a first cover corresponding to the bonding plate, and the vibration assembly also includes a support frame disposed on the first cover. The support frame is located between the support shaft and the counterweight, and the spring plate is embedded in the support frame to limit the circumferential rotation of the spring plate.

8. The vibration device according to claim 7, characterized in that, There is a gap between the spring plate and the support frame.

9. An anti-icing wind turbine blade, characterized in that, The vibration device includes any one of claims 1 to 8, wherein a plurality of vibration devices are arranged at intervals along the length direction and / or circumferential direction of the blade.

10. The anti-icing wind turbine blade according to claim 9, characterized in that, The mounting housing of the vibration device is fixed to the inner or outer surface of the blade.

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