A device to prevent blade tip from sweeping tower

Abstract

The present invention discloses a device for preventing blade tip from sweeping the tower, comprising: a support platform, a buffering energy-absorbing device for being mounted on the tower of a wind power device, rotatably arranged on the support platform, and the buffering energy-absorbing device is arranged at a position where the blade of the wind power device contacts the tower after deformation. The buffering energy-absorbing device of the present invention can rotate along the tower under the action of an external force. When the tip of the blade undergoes a large deformation and has a tendency to hit the tower, the buffering energy-absorbing device first contacts the blade, thereby playing a buffering and decelerating role. At the same time, the buffering energy-absorbing device rotates under the action of the impact force of the blade, thereby assisting the blade to rotate to avoid sweeping the tower, further reducing the impact force of the blade, and at the same time guiding the blade to quickly pass through the tower to avoid direct collision between the blade tip and the tower. The present invention has no requirements for the weather environment, which reduces the requirements for the environment and prevents the failure of the anti-sweep tower in special environments.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to a device for preventing blade tips from sweeping a tower. Background Art

[0002] As wind turbines become larger, blades become longer and more flexible, leading to increased blade deformation and even the risk of tower sweep. Currently, to reduce blade costs, blade safety margins are being reduced, increasing the risk of tower sweep.

[0003] In order to more effectively ensure the safety and reliability of the blades and reduce blade deformation, on the one hand, traditional control methods are used to reduce the blade load, thereby reducing blade tip deformation, but this will result in a loss of power generation. Another method is to install a lidar on the nacelle and use the lidar to scan the distance between the blades and the tower to control the blade pitch, ultimately preventing the blades from sweeping the tower. The disadvantages of this method are that, on the one hand, the environmental adaptability of the laser is limited, and it is easy to fail in foggy weather, making it impossible to properly control the pitch. On the other hand, this method requires an opening in the nacelle and the installation of a lidar, which is relatively expensive.

[0004] Therefore, how to reduce the requirements on the environment and prevent the anti-sweep tower from failing in special environments is a technical problem that those skilled in the art currently need to solve. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a blade tip sweep prevention device to reduce environmental requirements and prevent the failure of the anti-sweep tower in special environments.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A device for preventing blade tip sweeping a tower, comprising:

[0008] Support platform, used to be installed on the tower of wind power equipment

[0009] The buffering energy absorbing device is rotatably arranged on the supporting platform, and the buffering energy absorbing device is arranged at a position where the blades of the wind power equipment contact the tower after deformation.

[0010] Optionally, in the above-mentioned blade tip sweep prevention device, the buffer energy absorption device is rotatably arranged on the support platform through a rotating assembly, and the rotating assembly at least includes a rotating support device, and the rotating support device includes:

[0011] A rotating base frame, the rotating base frame is arranged on the supporting platform and has a base frame hole sleeved on the tower frame, and the rotating base frame is provided with a base frame roller;

[0012] A rotating stand is arranged on the rotating base frame and extends along the height direction of the tower frame. The rotating stand has a stand hole that is sleeved on the tower frame. The rotating stand is provided with a stand roller. The buffer energy absorbing device is sleeved on the outside of the rotating stand, and the inner wall of the buffer energy absorbing device cooperates with the stand roller, and the bottom wall of the buffer energy absorbing device cooperates with the base frame roller.

[0013] Optionally, in the above-mentioned anti-tip sweep tower device, the rotating support device is composed of at least two rotating support frames, and the rotating support frame includes a base frame part and a vertical frame part. After the rotating support frames are spliced ​​together, the base frame parts of the rotating support frames constitute the rotating base frame, and the vertical frame parts of the rotating support frames constitute the rotating vertical frame.

[0014] Optionally, in the above-mentioned anti-blade tip sweep tower device, each of the rotation support frames is connected by welding or snap-fitting to form the rotation support device.

[0015] Optionally, in the above-mentioned blade tip sweep prevention device, the rotating assembly further includes a rotating cover arranged between the rotating support device and the buffer energy absorption device, and the rotating cover includes:

[0016] A rotating base plate, the rotating base plate is supported on the base frame roller and has a base plate hole sleeved on the tower frame;

[0017] The rotating sleeve is arranged on the rotating base plate and extends along the height direction of the tower. The rotating sleeve has a sleeve hole which is sleeved on the rotating stand. The inner wall of the sleeve hole is in contact with the stand roller.

[0018] Optionally, in the above-mentioned anti-tip sweep tower device, the rotating cover is composed of at least two rotating cover parts, and the rotating cover part includes a bottom plate part and a sleeve part. After the rotating cover parts are spliced ​​together, the bottom plate parts of each rotating cover part constitute the rotating bottom plate, and the sleeve parts of each rotating cover part constitute the rotating sleeve.

[0019] Optionally, in the above-mentioned anti-tip sweep tower device, the buffer energy absorbing device is a cylindrical structure, and includes at least two buffer energy absorbing parts arranged on the outside of the tower, and each of the buffer energy absorbing parts is bonded by an adhesive.

[0020] Optionally, in the above-mentioned anti-tip sweep tower device, rope through holes are provided at the fitting surfaces of two adjacent buffering energy-absorbing parts, and binding ropes are passed through the rope through holes to fix the two buffering energy-absorbing parts.

[0021] Optionally, in the above-mentioned anti-tip sweep tower device, the buffer energy absorbing device is a layer or multiple layers arranged along the radial direction of the tower. When the buffer energy absorbing device is multiple layers, the elasticity of the buffer energy absorbing device located in the outer layer is greater than the elasticity of the buffer energy absorbing device located in the inner layer.

[0022] Optionally, in the above-mentioned blade tip sweep prevention device, a plurality of pressure sensors are arranged at intervals along the circumferential direction on the inner wall of the buffer energy absorption device, and the pressure sensors wirelessly transmit the detected pressure values ​​to the unit control system;

[0023] It also includes an alarm device, which is used to alarm when the pressure value detected by the pressure sensor is greater than a set value, and at the same time, the unit control system controls the wind power equipment to shut down.

[0024] Optionally, in the above-mentioned anti-tip sweep tower device, the support platform is a circular support platform, which is composed of multiple fan-shaped platforms, each of which is welded to the tower frame, and a support rib is welded under each of the fan-shaped platforms, and the support rib is welded to the tower frame.

[0025] Optionally, in the above-mentioned blade tip sweep prevention device, the difference between the outer diameter and the inner diameter of the support platform is greater than 0.5 m; and / or,

[0026] The support platform is located lower than the position where the blade contacts the tower after deformation, and the distance between the support platform and the position where the blade contacts the tower after deformation is not less than 0.5 m; and / or,

[0027] The buffer energy absorbing device extends to both sides from the position where the blade contacts the tower after deformation, and the extension length is not less than 0.5m; and / or,

[0028] The outer diameter of the buffer energy absorbing device is larger than the outer diameter of the support platform, and the difference between the outer diameter of the buffer energy absorbing device and the outer diameter of the support platform is not less than 0.3m.

[0029] The anti-tip sweep tower device provided by the present invention fixes a support platform on the tower, and the buffer energy absorbing device is fixedly supported by the support platform, so that the buffer energy absorbing device is fixed at the corresponding position of the tower, and the buffer energy absorbing device can rotate along the tower under the action of external force. When the tip of the blade undergoes a large deformation and tends to hit the tower, the buffer energy absorbing device first contacts the blade, thereby playing a buffering and decelerating role. At the same time, the buffer energy absorbing device rotates under the action of the impact force of the blade, thereby assisting the blade to rotate to avoid sweeping the tower, further reducing the impact force of the blade, and guiding the blade to pass through the tower quickly to avoid direct collision between the blade tip and the tower. The present invention has no requirements for the weather environment, which reduces the requirements for the environment and prevents the failure of the anti-sweep tower in special environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of the blade tip sweep prevention device provided by an embodiment of the present invention installed on a wind power device;

[0032] Figure 2 A top view of a support platform provided in an embodiment of the present invention;

[0033] Figure 3 A schematic structural diagram of a rotation support device provided in an embodiment of the present invention;

[0034] Figure 4 A top view of a rotation support device provided in an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram of a rotating cover provided in an embodiment of the present invention;

[0036] Figure 6 A schematic structural diagram of a buffer energy absorption device provided in an embodiment of the present invention;

[0037] Figure 7 A top view of the buffer energy absorption device provided in an embodiment of the present invention;

[0038] Figure 8 This is a schematic structural diagram of a buffer energy absorption device provided in another embodiment of the present invention.

[0039] The meanings of the reference numerals in the figures are as follows:

[0040] 100 is a wind turbine, 101 is a nacelle, 102 is a blade, 1021 is a blade before deformation, 1022 is a blade after deformation, and 103 is a tower.

[0041] 200 is a device for preventing blade tip sweeping the tower, 201 is a buffer energy absorption device, 2011 is a buffer energy absorption part, 2012 is a binding rope, 2013 is a buffer energy absorption hole, 2014 is a pressure sensor, 202 is a support platform, 2021 is a fan-shaped platform, 2022 is a support rib, 2023 is a support platform hole, 203 is a rotating support device, 2031 is a rotating base frame, 2032 is a rotating stand, 2033 is a stand roller shaft, 2034 is a stand roller, 2035 is a base roller shaft, 2036 is a base roller, 204 is a rotating cover, 2041 is a rotating base plate, and 2042 is a rotating sleeve. DETAILED DESCRIPTION

[0042] The core of the present invention is to provide a blade tip sweep prevention device to reduce environmental requirements and prevent the failure of the anti-sweep tower in special environments.

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] like Figure 1 As shown, an embodiment of the present invention discloses a blade tip sweep prevention device 200, comprising a support platform 202 and a buffering energy absorption device 201. The support platform 202 is configured to be mounted on the tower 103 of the wind turbine 100 and fixedly connected to the tower 103. The connection method may be welding, fastener connection, or any other method that can achieve fixation.

[0045] Energy-absorbing buffer 201 is rotatably mounted on support platform 202 and is positioned where blades 102 of wind turbine 100 contact tower 103 after deformation. Before deformation (pre-deformation blade 1021), the tip of blade 102 is relatively far from tower 103. In strong winds, blade 102 deforms, and after deformation (post-deformation blade 1022), the tip of blade 102 gradually decreases to tower 103, potentially posing a risk of tower damage.

[0046] The energy-absorbing device 201 can be a cylindrical structure mounted on the tower 103, i.e., the energy-absorbing device 201 can be arranged around the periphery of the tower 103. Alternatively, the energy-absorbing device 201 can be placed only at the collision points between the blades 102 and the tower 103. The energy-absorbing device 201 can be made of a material with a cushioning effect, such as sponge or foam. Of course, other materials can also be used as long as they can prevent collisions between the blades 102 and the tower 103.

[0047] The anti-tip sweep tower device 200 provided by the present invention has a support platform 202 fixed on the tower 103. The support platform 202 fixes and supports the buffer energy absorbing device 201, so that the buffer energy absorbing device 201 is fixed to the corresponding position of the tower 103, and the buffer energy absorbing device 201 can rotate along the tower 103 under the action of an external force. When the tip of the blade 102 undergoes a large deformation and tends to hit the tower 103, the buffer energy absorbing device 201 first contacts the blade 102, thereby playing a buffering and decelerating role. At the same time, the buffer energy absorbing device 201 rotates under the impact force of the blade 102, thereby assisting the blade 102 in rotating to avoid sweeping the tower, further reducing the impact force of the blade 102, and guiding the blade 102 to quickly pass through the tower 103 to avoid direct collision between the blade tip and the tower 103. The present invention has no requirements for the weather environment, which reduces the requirements for the environment and prevents the failure of the anti-sweep tower in special environments.

[0048] like Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, the buffer energy absorption device 201 is rotatably arranged on the support platform 202 through a rotating assembly. The rotating assembly at least includes a rotating support device 203, and the rotating support device 203 includes a rotating base frame 2031 and a rotating stand frame 2032.

[0049] The rotating base frame 2031 is disposed on the support platform 202 and has a base frame hole that is sleeved on the tower 103. The rotating base frame 2031 is provided with a base frame roller 2036. The base frame roller 2036 is mounted on the rotating base frame 2031 via a base frame roller shaft 2035, allowing the base frame roller 2036 to rotate along the base frame roller shaft 2035. A plurality of base frame rollers 2036 can be evenly arranged along the circumference of the rotating base frame 2031. The base frame rollers 2036 can roll with the support platform 202. Alternatively, the rotating base frame 2031 can be fixed to the support platform 202, with a certain gap between the base frame rollers 2036 and the support platform 202 to prevent contact between the two. In other words, the rotating base frame 2031 can rotate relative to the support platform 202, or not, as long as the buffer and energy-absorbing device 201 can rotate.

[0050] The rotating frame 2032 is mounted on the rotating base frame 2031 and extends along the height of the tower 103. The outer diameter of the rotating frame 2032 is smaller than that of the rotating base frame 2031. The rotating frame 2032 has a frame hole that is sleeved on the tower 103. The diameter of the frame hole can be the same as the diameter of the base frame hole, and the two are arranged coaxially. The rotating frame 2032 is provided with a frame roller 2034. The frame roller 2034 is mounted on the rotating frame 2032 via a frame roller shaft 2033, allowing the frame roller 2034 to rotate along the frame roller shaft 2033. Multiple frame roller shafts 2033 can be evenly arranged along the circumference of the rotating frame 2032. Each frame roller shaft 2033 can be provided with one frame roller 2034, or multiple frame rollers 2034 can be provided.

[0051] When multiple stand rollers 2034 are provided on a single stand roller shaft 2033, the sizes of the stand rollers 2034 can be different or the same, as long as the stand rollers 2034 can facilitate the rotation of the buffer and energy-absorbing device 201. The rotation support device 203 can be designed to rotate along the tower 103 or to be fixed relative to the tower 103. When rotating along the tower 103, the stand rollers 2034 need to roll in conjunction with the tower 103.

[0052] The buffering energy absorbing device 201 is mounted on the outside of the rotating stand 2032, and the inner wall of the buffering energy absorbing device 201 cooperates with the stand roller 2034, and the bottom wall of the buffering energy absorbing device 201 cooperates with the base roller 2036, so that when the buffering energy absorbing device 201 is subjected to external force, it can be easier to rotate under the rolling action of the stand roller 2034 and the base roller 2036, thereby reducing the rotation resistance.

[0053] In order to facilitate the installation of the rotating support device 203, in a specific embodiment of the present invention, the rotating support device 203 is spliced ​​by at least two rotating support frames, so that the rotating support device 203 does not need to be inserted from the end of the tower 103 and can be installed along the radial direction of the tower 103.

[0054] The rotating support frame includes a base frame portion and a vertical frame portion. After the individual rotating support frames are assembled, the base frame portions of the individual rotating support frames form the rotating base frame 2031, and the vertical frame portions of the individual rotating support frames form the rotating vertical frame 2032. In other words, the rotating support frame is equivalent to dividing the rotating support device 203 into multiple pieces along the circumference of the tower 103, so that each rotating support frame piece can be attached to the outside of the tower 103. After attachment, each rotating support frame is then fixed. Specifically, the individual rotating support frames can be assembled into the rotating support device 203 by welding, or they can be fixed by snap-fit ​​connections to form the rotating support device 203.

[0055] like Figure 5 As shown, further, the rotating assembly may further include a rotating cover 204 disposed between the rotating support device 203 and the buffering energy absorbing device 201 , and the rotating cover 204 includes a rotating base plate 2041 and a rotating sleeve 2042 .

[0056] The rotating base plate 2041 is supported on the base rollers 2036 and has base plate holes that are sleeved on the tower 103. The outer diameter of the rotating base plate 2041 needs to be smaller than the outer diameter of the rotating base 2031 and needs to be able to cover the base rollers 2036 on the rotating base 2031.

[0057] The rotating sleeve 2042 is mounted on the rotating base plate 2041 and extends along the height of the tower 103. Its outer diameter is smaller than that of the rotating base plate 2041. The rotating sleeve 2042 has a sleeve hole that fits over the rotating stand 2032. The inner wall of the sleeve hole mates with the stand roller 2034. Under the action of the base roller 2036 and the stand roller 2034, the rotating cover 204 rotates more easily and with less rotational resistance. The energy-absorbing buffer 201 is mounted on and fixed to the rotating sleeve 2042, ensuring that the energy-absorbing buffer 201 and the rotating sleeve 2042 rotate synchronously. The rotating cover 204 can be made of hard materials, such as metal, so that the soft material buffering and energy absorption device 201 can cooperate with the base roller 2036 and the vertical frame roller 2034 through the rotating cover 204 made of hard materials, which is more conducive to the rolling of the base roller 2036 and the vertical frame roller 2034.

[0058] To facilitate installation of the rotating cover 204 , in a specific embodiment of the present invention, the rotating cover 204 is composed of at least two rotating cover parts, so that the rotating cover 204 does not need to be inserted from the end of the tower 103 and can be installed radially along the tower 103 .

[0059] The rotating cover portion includes a base plate portion and a sleeve portion. After the rotating cover portions are assembled, the base plates of the rotating cover portions form a rotating base plate 2041, and the sleeve portions of the rotating cover portions form a rotating sleeve 2042. In other words, the rotating cover portion is equivalent to dividing the rotating cover 204 into multiple pieces along the circumference of the tower 103, so that each rotating cover portion can be attached to the outside of the rotating stand 2032. After attachment, each rotating cover portion is then fixed. Specifically, the rotating cover portions can be assembled into the rotating cover 204 by welding, or they can be fixed by snap-fit ​​connections to form the rotating cover 204.

[0060] like Figure 6-Figure 8As shown, the buffering energy absorbing device 201 is a cylindrical structure having a buffering energy absorbing hole 2013 sleeved on the outside of the rotating sleeve 2042. The buffering energy absorbing device 201 includes at least two buffering energy absorbing parts 2011 arranged on the outside of the tower 103, and each buffering energy absorbing part 2011 is bonded by an adhesive. In other words, the buffering energy absorbing part 2011 is equivalent to dividing the buffering energy absorbing device 201 into multiple pieces along the circumferential direction of the tower 103, so that each buffering energy absorbing part 2011 can be attached to the outside of the rotating cover 204, and then each buffering energy absorbing part 2011 is fixed after attachment. Specifically, the buffering energy absorbing parts 2011 can be assembled into the buffering energy absorbing device 201 by bonding with an adhesive.

[0061] Furthermore, rope holes are provided on the mating surfaces of two adjacent energy-absorbing and buffering parts 2011, through which lashing ropes 2012 are passed to secure the two energy-absorbing and buffering parts 2011. The lashing ropes 2012 can further reinforce the energy-absorbing and buffering parts 2011, making the connection between the energy-absorbing and buffering parts 2011 more stable and preventing them from detaching due to blade impact.

[0062] Furthermore, the buffer energy absorbing device 201 is a layer ( Figure 6 The scheme shown) or multi-layer ( Figure 8 In the embodiment shown, when the energy-absorbing buffer 201 is multi-layered, the elasticity of each layer of the energy-absorbing buffer 201 can be designed to be different, that is, materials with different elasticities can be selected. The elasticity of the energy-absorbing buffer 201 in the outer layer is greater than that of the energy-absorbing buffer 201 in the inner layer. This results in the outer layer of the energy-absorbing buffer 201 in contact with the blade having greater elasticity, thereby dissipating the impact energy to a greater extent. The energy-absorbing buffer 201 in the inner layer has less elasticity, resulting in less deformation and a stronger support effect.

[0063] like Figure 6 As shown, a plurality of pressure sensors 2014 are arranged at intervals along the circumferential direction on the inner wall of the buffer energy absorption device 201 , and the pressure sensors 2014 wirelessly transmit the detected pressure values ​​to the unit control system of the wind power equipment 100 .

[0064] The blade tip sweep prevention device disclosed in the embodiment of the present invention also includes an alarm device. This alarm device is configured to sound an alarm when the pressure value detected by pressure sensor 2014 exceeds a set value, alerting maintenance personnel that the blade impact force is excessive and may damage the blades. Simultaneously, the wind turbine control system shuts down wind turbine 100. Pressure sensors 2014 can be positioned at the middle of the height of buffer energy absorption device 201 and evenly spaced along its circumference.

[0065] like Figure 2As shown, the support platform 202 is a circular support platform having a support platform hole 2023 sleeved on the outside of the tower 103. The support platform 202 is composed of a plurality of fan-shaped platforms 2021. That is, the fan-shaped platform 2021 is equivalent to dividing the support platform 202 into multiple pieces along the circumferential direction of the tower 103, so that each fan-shaped platform 2021 can be attached to the outside of the tower 103, and then each fan-shaped platform 2021 is fixed after attachment. Specifically, each fan-shaped platform 2021 can be welded to the tower 103, and a support rib 2022 is welded below each fan-shaped platform 2021. The support rib 2022 is welded to the tower 103 to improve the stability of the support platform 202 and provide more stable support for the buffer energy absorption device 201.

[0066] Furthermore, the difference between the outer diameter and the inner diameter of the support platform 202 is greater than 0.5m, that is, the radial width of the fan-shaped platform 2021 is not less than 0.5m, so as to have sufficient width to provide support for the buffer energy absorption device 201, so that the buffer energy absorption device 201 has sufficient thickness.

[0067] The position of the support platform 202 is lower than the position where the blade 102 contacts the tower 103 after deformation, and the distance between the support platform 202 and the position where the blade 102 contacts the tower 103 after deformation is not less than 0.5m to prevent the blade 102 from hitting the support platform 202 after deformation, causing damage to the blade 102.

[0068] The buffering energy-absorbing device 201 extends to both sides from the position where the blade 102 contacts the tower 103 after deformation, and the extension length is not less than 0.5m, so that the blade 102 theoretically hits the middle position of the buffering energy-absorbing device 201 after deformation. Even if there is an error, causing the blade 102 to deviate from the theoretical position after deformation, the buffering energy-absorbing device 201 extends more than 0.5m to both sides from the theoretical impact position, which can prevent the blade 102 from deviating from the position covered by the buffering energy-absorbing device 201 and avoid the blade 102 hitting the tower 103.

[0069] The outer diameter of the buffer energy absorbing device 201 is larger than the outer diameter of the support platform 202, and the difference between the outer diameter of the buffer energy absorbing device 201 and the outer diameter of the support platform 202 is not less than 0.3m, which can also prevent the blade 102 from colliding with the support platform 202 after deformation to a certain extent, causing damage to the blade 102.

[0070] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0071] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0072] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0073] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for preventing blade tip sweeping the tower, characterized in that: include: A support platform (202) is used to be mounted on a tower (103) of a wind power device (100) The buffering energy absorbing device (201) is rotatably arranged on the support platform (202), and the buffering energy absorbing device (201) is arranged at a position where the blades (102) of the wind power equipment (100) contact the tower (103) after deformation. The buffering energy absorbing device (201) is rotatably arranged on the support platform (202) via a rotating assembly, and the rotating assembly at least includes a rotating support device (203), and the rotating support device (203) includes: A rotating base frame (2031), the rotating base frame (2031) is arranged on the supporting platform (202) and has a base frame hole sleeved on the tower frame (103), and a base frame roller (2036) is provided on the rotating base frame (2031); The rotating stand (2032) is arranged on the rotating base (2031) and extends along the height direction of the tower (103). The rotating stand (2032) has a stand hole sleeved on the tower (103). The rotating stand (2032) is provided with a stand roller (2034). The buffer energy absorption device (201) is sleeved on the outside of the rotating stand (2032), and the inner wall of the buffer energy absorption device (201) cooperates with the stand roller (2034). The buffer energy absorption device (201) is provided on the outer side of the rotating stand (2032). The bottom wall of the energy absorbing device (201) cooperates with the base frame roller (2036); the energy absorbing buffer device (201) is a cylindrical structure and comprises at least two energy absorbing buffer parts (2011) arranged outside the tower (103); the energy absorbing buffer parts (2011) are bonded together by an adhesive; a plurality of pressure sensors (214) are arranged on the inner wall of the energy absorbing buffer device (201) at intervals along the circumferential direction; the pressure sensors (2014) wirelessly transmit the detected pressure values ​​to the unit control system; The blade tip tower sweep prevention device further comprises an alarm device, which is used to alarm when the pressure value detected by the pressure sensor (2014) is greater than a set value, and at the same time, the unit control system controls the wind power equipment (100) to shut down.

2. The blade tip sweep prevention device according to claim 1, characterized in that: The rotation support device (203) is formed by splicing at least two rotation support frames, and the rotation support frames include a base frame portion and a stand frame portion. After the rotation support frames are spliced, the base frame portions of the rotation support frames form the rotation base frame (2031), and the stand frame portions of the rotation support frames form the rotation stand frame (2032).

3. The blade tip sweep prevention device according to claim 2, characterized in that: The rotation support frames are connected by welding or snap-fitting to form the rotation support device (203).

4. The blade tip sweep prevention device according to claim 1, characterized in that: The rotating assembly further comprises a rotating cover (204) arranged between the rotating support device (203) and the buffering energy absorbing device (201), wherein the rotating cover (204) comprises: A rotating base plate (2041), the rotating base plate (2041) is supported on the base frame roller (2036) and has a base plate hole sleeved on the tower frame (103); A rotating sleeve (2042) is arranged on the rotating base plate (2041) and extends along the height direction of the tower (103). The rotating sleeve (2042) has a sleeve hole sleeved on the rotating stand (2032), and the inner wall of the sleeve hole is in contact with the stand roller (2034).

5. The blade tip sweep prevention device according to claim 4, characterized in that: The rotating cover (204) is formed by splicing at least two rotating cover parts, and the rotating cover parts include a bottom plate part and a sleeve part. After the rotating cover parts are spliced ​​together, the bottom plate parts of the rotating cover parts form the rotating bottom plate (2041), and the sleeve parts of the rotating cover parts form the rotating sleeve (2042).

6. The blade tip sweep prevention device according to claim 1, characterized in that: Rope-threading holes are provided at the fitting surfaces of two adjacent buffering and energy-absorbing parts (2011), and tying ropes (2012) are passed through the rope-threading holes to fix the two buffering and energy-absorbing parts (2011).

7. The blade tip sweep prevention device according to claim 1, characterized in that: The buffering energy absorbing device (201) is a single layer or multiple layers arranged along the radial direction of the tower (103); when the buffering energy absorbing device (201) is multiple layers, the elasticity of the buffering energy absorbing device (201) located in the outer layer is greater than the elasticity of the buffering energy absorbing device (201) located in the inner layer.

8. The blade tip sweep prevention device according to any one of claims 1 to 7, characterized in that: The support platform (202) is a circular support platform, and the support platform (202) is composed of a plurality of fan-shaped platforms (2021), each of the fan-shaped platforms (2021) is welded to the tower (103), and a support rib (2022) is welded below each of the fan-shaped platforms (2021), and the support rib (2022) is welded to the tower (103).

9. The blade tip sweep prevention device according to any one of claims 1 to 7, characterized in that: The difference between the outer diameter and the inner diameter of the support platform (202) is greater than 0.5 m; and / or, The position of the support platform (202) is lower than the position where the blade (102) contacts the tower (103) after deformation, and the distance between the support platform (202) and the position where the blade (102) contacts the tower (103) after deformation is not less than 0.5 m.

10. The blade tip sweep prevention device according to any one of claims 1 to 7, characterized in that: The buffering energy absorbing device (201) extends to both sides from the position where the blade (102) contacts the tower (103) after deformation, and the extension length is not less than 0.5 m; and / or, The outer diameter of the buffer energy absorption device (201) is greater than the outer diameter of the support platform (202), and the difference between the outer diameter of the buffer energy absorption device (201) and the outer diameter of the support platform (202) is not less than 0.3 m.

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