An anti-icing protection device and method for a wind turbine

Abstract

The application discloses a wind turbine anti-icing protection device and method, and belongs to the field of wind power generation. The device is provided with an edge heating assembly and a middle heating assembly, can respectively perform targeted heating treatment on the side edge narrowing part and the middle raised position of a blade, reduces the heating area, thereby achieving the effect of saving energy, and after the bending connection part of the ice block is cut off, the connection points between the ice blocks can be eliminated, the ice blocks can be automatically slid off before the ice blocks are completely melted, and the effects of deicing and anti-icing are achieved. Meanwhile, the device is also provided with a deicing assembly. The deicing assembly can be protruded outward relative to the outer surface of the blade under the action of centrifugal force, that is, the deicing assembly is protruded outward by switching the rotating state of the blade, and then the surface of the blade is impacted, thereby improving the deicing efficiency without damaging the blade body. The device has simple principle and structure, is convenient to disassemble, assemble, maintain and operate, and has good popularization and application value.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wind power generation, and particularly relates to a wind turbine anti-icing protection device and method. BACKGROUND

[0002] Wind energy is one of the important green energy sources, and is particularly rich in highlands, cold regions, ridges and mountain tops, and has great development value. However, the altitude is high, the humidity is large, and the temperature is low in these places, which can easily cause the icing of the blades of the wind turbine. The icing affects the aerodynamic performance of the blades, which can cause the blade overload and uneven blade load distribution, and thus the continuously generated wind energy is greatly affected. Therefore, certain measures are taken to prevent icing or timely de-icing.

[0003] In the prior art, the ice is first broken by a mechanical method, and then blown away by air flow. This scheme has low efficiency, high work intensity, and can cause damage to the surface of the blade. Alternatively, heating de-icing is used, various electric energy or heat energy is used to heat the object, the surface of the blade is quickly de-iced by electric heating of the surface electrical elements and metal devices. This method needs to set a heat conduction cavity in the blade, and the layout area is extensive, so a large amount of energy needs to be consumed, the construction cost is increased, and the de-icing efficiency is slow for the already iced condition.

[0004] Therefore, the existing de-icing measures of the wind turbine have large energy consumption, low de-icing efficiency, and can easily cause damage to the blade body. SUMMARY

[0005] To solve the above technical problems, the present application provides a wind turbine anti-icing protection device and method, which can save energy consumption, has higher de-icing efficiency, and will not cause damage to the blade body.

[0006] To achieve the above purpose, the present application adopts the following technical content:

[0007] A wind turbine anti-icing protection device, comprising:

[0008] a middle heating assembly arranged at the top of the blade of the wind turbine, an edge heating assembly arranged at the two side edges of the cavity of the blade, and a de-icing assembly arranged on the outer surface of the blade; the de-icing assembly can protrude outward relative to the outer surface of the blade under the action of centrifugal force, and is used for removing the ice on the outer surface of the blade.

[0009] Further, the edge heating assembly comprises a gas supply pipeline inserted into the side edge of the cavity; one end of the gas supply pipeline is connected with a gas supply mechanism, and the other end is connected with a hot gas flow pipeline, which is used for respectively conveying hot gas to the top and bottom of the side edge of the blade.

[0010] Further, the air supply mechanism comprises a cover connected to one end of the air supply pipeline, and a fan is arranged in the cover; the hot air flow pipeline comprises a hot air passage connected to the other end of the air supply pipeline, and the hot air passage is connected with a top partial flow passage and a bottom partial flow passage; a plurality of heating rings are arranged in the air supply pipeline in an array.

[0011] Further, the ends of the top partial flow passage and the bottom partial flow passage are provided with a plurality of air outlet holes, and the air outlet holes are uniformly distributed on the top and bottom of the side edge of the blade; the top partial flow passage is arranged in parallel with the top surface of the blade, and the bottom partial flow passage is arranged in parallel with the bottom surface of the blade.

[0012] Further, the edge heating assembly further comprises an edge plate arranged on the blade, and the edge plate is provided with a plurality of heating blocks in an array on the side edge.

[0013] Further, the middle heating assembly comprises an electric heating plate and a wire tube embedded in a shell on the top of the blade, and the wire tube is connected to the electric heating plate; a plurality of groups of the deicing assemblies are arranged in an array on the two sides of the middle heating assembly.

[0014] Further, a heat-conducting layer is embedded in the top protrusion of the blade, and the electric heating plate is arranged in close contact with the heat-conducting layer.

[0015] Further, the deicing assembly comprises a protruding mechanism and an impact mechanism.

[0016] The protruding mechanism comprises a top plate located in a clamping groove of the blade; a first connecting rod and a second connecting rod are alternately arranged at the bottom of the top plate; a traction spring is sleeved at the lower end of the first connecting rod; a guide block is connected to the lower end of the second connecting rod; a through hole is arranged on the clamping groove; the first connecting rod and the second connecting rod pass through the through hole respectively, and the lower ends of the first connecting rod and the second connecting rod are located in a groove at the top of the cavity; and the end of the traction spring is fixedly connected to the inner wall of the groove.

[0017] The impact mechanism comprises a buffer spring, a buffer plate, a weight block, a push rod and an impact hammer connected in sequence; the buffer spring is fixed to the inner wall of the groove; and the impact hammer is arranged vertically to the guide block.

[0018] Further, a guide bracket is sleeved on the push rod, and the guide bracket is fixed to the inner wall of the groove; the contact surfaces of the impact hammer and the guide block are both inclined surfaces, and when the impact hammer and the guide block cooperate, the two inclined surfaces are aligned with each other, and the lengths of the impact hammer and the guide block are the same.

[0019] A wind turbine anti-icing protection method based on the wind turbine anti-icing protection device, characterized in that the method comprises:

[0020] The edge heating assembly and the middle heating assembly cut and melt the bending connecting part of the ice block, and the deicing assembly is outwardly protruded relative to the outer surface of the blade by switching the rotating state of the blade, so that the deicing assembly is outwardly protruded relative to the outer surface of the blade, and the ice on the outer surface of the blade is removed.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application provides a wind turbine anti-icing protection device, which adopts an edge heating assembly arranged on the two sides of the cavity and a middle heating assembly arranged on the top of the blade, can heat the narrow part of the side of the blade and the position of the middle protrusion respectively, reduces the heating area, thereby saving energy, and cutting off the bending connecting part of the ice block can eliminate the connecting points between the ice blocks, and the ice blocks can automatically slide off before completely melting, thereby achieving the effects of deicing and anti-icing.

[0023] Preferably, the edge heating assembly of the present application adopts a gas supply pipeline and a gas supply mechanism, and the gas supply mechanism supplies air to the hot gas flow pipeline connected to the air supply pipeline, and finally delivers hot air to the top and bottom of the side of the blade.

[0024] Further preferably, the hot gas flow pipeline includes a hot gas passage, a top flow passage and a bottom flow passage, which facilitates targeted heating treatment; a plurality of heating rings are arranged in the gas supply pipeline, which can continuously deliver hot air.

[0025] Preferably, the edge heating assembly further includes an edge plate arranged on the blade, and a plurality of heating blocks are additionally arranged on the edge plate, which further improves the deicing efficiency.

[0026] Preferably, the middle heating assembly of the present application adopts a wire tube embedded in the shell on the top of the blade and an electric heating plate, and a heat-conducting layer is embedded on the protruding part of the top of the blade, so that the electric heating plate transmits heat to the heat-conducting layer, and the heat-conducting layer further transmits heat to the blade, thereby ensuring the deicing effect.

[0027] Preferably, the deicing assembly of the present application comprises a top plate and an impact hammer, in the process of heating melting by the edge heating assembly and the independent middle heating assembly, by means of the deicing assembly on the surface of the blade, the top plate is protruded outward by switching the rotating state of the blade itself, so as to impact the surface of the blade, thereby further promoting the separation of the ice block, and the structure is uniformly dispersed on the surface of the blade, and the impact is also vertically outward, so that the blade body is not damaged, since the blade part rotates in the process of wind power generation, when the top blade rotates to the bottom, the impact hammer is quickly pressed down by the centrifugal effect and the weight block, until the inclined surface of the guide block is contacted, that is, the guide block is pushed outwards, the guide block pushes the top plate outwards by the second connecting rod, so as to realize the impact and removal effect of the surface ice, after the impact is completed, with the continuous rotation of the blade, until the top is rotated, the impact hammer and the weight block can be moved away from the guide block again, so as to facilitate the subsequent impact effect; in this way, the deicing efficiency is improved without damaging the blade body.

[0028] The present application also provides a wind turbine anti-icing protection method based on the wind turbine anti-icing protection device, which can save energy consumption, improve deicing efficiency and prevent damage to the blade body. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A structural schematic view of a wind turbine anti-icing protection device provided by the present application is provided.

[0030] Figure 2 A structural schematic view of an edge heating assembly part of a wind turbine anti-icing protection device provided by the present application is provided.

[0031] Figure 3 A structural schematic view of a middle heating assembly part of a wind turbine anti-icing protection device provided by the present application is provided.

[0032] Figure 4 A structural schematic view of a deicing assembly part of a wind turbine anti-icing protection device provided by the present application is provided.

[0033] Figure 5 A sectional view of a deicing assembly part of a wind turbine anti-icing protection device provided by the present application is provided.

[0034] REFERENCE SIGNS:

[0035] 1 blade; 2 cavity; 3 edge heating assembly; 4 middle heating assembly; 5 deicing assembly; 6 air supply pipeline; 7 cover; 8 fan; 9 heating ring; 10 hot gas passage; 11 top sub-flow passage; 12 bottom sub-flow passage; 13 edge plate; 14 air outlet hole; 15 heating block; 16 heat conduction layer; 17 wire tube; 18 electric heating plate; 19 top plate; 20 first connecting rod; 21 traction spring; 22 second connecting rod; 23 guide block; 24 clamping groove; 25 through hole; 26 buffer spring; 27 buffer plate; 28 weight block; 29 push rod; 30 guide support; 31 impact hammer; 32 groove. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present application, the technical solutions and advantages clearer, the following specific embodiments are used to further illustrate the present application. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0037] The present application provides a wind turbine anti-icing protection device, the blade 1 is the blade of the wind turbine, a cavity 2 is formed in the blade 1, the wind turbine anti-icing protection device comprises: an edge heating assembly 3 arranged on both sides of the cavity 2, a middle heating assembly 4 arranged on the top of the blade 1, and a deicing assembly 5 arranged on the outer surface of the blade 1; the deicing assembly 5 can protrude outward relative to the outer surface of the blade 1 under the action of centrifugal force, and is used for removing the ice on the outer surface of the blade 1.

[0038] Specifically, the edge heating assembly 3 comprises an air supply pipeline 6 inserted into the side of the cavity 2; one end of the air supply pipeline 6 is connected with an air supply mechanism, and the other end of the air supply pipeline 6 is connected with a hot gas flow passage; the hot gas flow passage is used for respectively conveying hot gas to the top and the bottom of the side of the blade 1.

[0039] The air supply mechanism comprises a cover 7 connected with one end of the air supply pipeline 6, and a fan 8 is arranged in the cover 7; the hot gas flow passage comprises a hot gas passage 10 connected with the other end of the air supply pipeline 6, and the hot gas passage 10 is connected with a top sub-flow passage 11 and a bottom sub-flow passage 12; a plurality of heating rings 9 are arranged in the air supply pipeline 6.

[0040] The end of the top sub-flow passage 11 and the end of the bottom sub-flow passage 12 are both provided with a plurality of air outlet holes 14, and the plurality of air outlet holes 14 are uniformly distributed on the top and the bottom of the side of the blade 1; the top sub-flow passage 11 is arranged in parallel with the top surface of the blade 1, and the bottom sub-flow passage 12 is arranged in parallel with the bottom surface of the blade 1.

[0041] The edge heating assembly 3 further comprises an edge plate 13 arranged on the blade 1, and a plurality of heating blocks 5 are arranged in the side of the edge plate 13.

[0042] The middle heating assembly 4 comprises an electric heating plate 18 and a wire tube 17 embedded in the shell at the top of the blade 1, and the wire tube 17 is connected with the electric heating plate 18; a plurality of groups of deicing assemblies 5 are arranged on the two sides of the middle heating assembly 4 respectively; and the top of the blade 1 is embedded with a heat-conducting layer 16, and the electric heating plate 18 is arranged in close contact with the heat-conducting layer 16.

[0043] The deicing assembly 5 comprises a protruding mechanism and a striking mechanism.

[0044] Specifically, the protruding mechanism comprises a top plate 19 located in a clamping groove 24 of the blade 1; the bottom of the top plate 19 is alternately provided with a first connecting rod 20 and a second connecting rod 22; the lower end of the first connecting rod 20 is sleeved with a traction spring 21; the lower end of the second connecting rod 22 is connected with a guide block 23; a through hole 25 is arranged on the clamping groove 24; the first connecting rod 20 and the second connecting rod 22 respectively pass through the through hole 25, and the lower ends of the first connecting rod 20 and the second connecting rod 22 are located in a recess 32 at the top of the cavity 2; and the end of the traction spring 21 is fixedly connected with the inner wall of the recess 32.

[0045] The striking mechanism comprises a buffer spring 26, a buffer plate 27, a weight block 28, a push rod 29 and an impact hammer 31 connected in sequence; the buffer spring 26 is fixed on the inner wall of the recess 32; the impact hammer 31 is arranged vertically with the guide block 23; a guide bracket 30 is sleeved on the push rod 29, and the guide bracket 30 is fixed on the inner wall of the recess 32; the contact surfaces of the impact hammer 31 and the guide block 23 are both inclined surfaces, and when the impact hammer 31 and the guide block 23 cooperate, the two inclined surfaces are aligned with each other, and the lengths of the impact hammer 31 and the guide block 23 are the same.

[0046] The application also provides a wind turbine anti-icing protection method based on the wind turbine anti-icing protection device.

[0047] The edge heating assembly 3 and the middle heating assembly 4 are used to cut and melt the bending connection of the ice block, and the deicing assembly 5 is used to make the deicing assembly 5 protrude outward relative to the outer surface of the blade 1 by switching the rotating state of the blade 1, so as to remove the ice on the outer surface of the blade 1.

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0054] The present invention will now be described in further detail with reference to the accompanying drawings:

[0055] Example

[0056] like Figure 1 As shown, this embodiment provides a wind turbine anti-icing protection device. The entire device is installed in the blade 1 and its cavity 2 of the wind turbine, including:

[0057] The components include edge heating element 3, center heating element 4, and de-icing element 5; their specific structures and working principles are as follows:

[0058] The edge heating assembly 3 is installed on both sides of the cavity 2, the outer side of the edge heating assembly 3 is provided with an edge plate 13, a plurality of heating blocks 15 are fixedly installed on the side edge of the edge plate 13, and the spacing between each heating block 15 is the same, the inside of the edge heating assembly 3 is provided with a gas feeding pipeline 6, the middle heating assembly 4 is installed on the top of the blade 1, the surface of the blade 1 is provided with a clamping groove 24, the inside of the clamping groove 24 is installed with the deicing assembly 5, the top of the deicing assembly 5 is provided with a top plate 19, and the top plate 19 is embedded into the inside of the clamping groove 24. The wind turbine generator anti-icing protection device is provided with two edge heating assemblies 3, which can blow and heat the bending position of the narrowed side edge of the blade 1, and the plurality of heating blocks 15 can melt and cut the iced part, and the middle heating assembly 4 at the raised position of the middle blade 1 can melt the ice on the top again, so that the iced part is divided and the ice is accelerated to slide off. For the uniced state, the hot air blown by the edge heating assembly 3 can heat the surface of the blade 1, thereby achieving the effect of anti-icing.

[0059] As shown in the embodiment, Figure 2 The edge heating assembly 3 includes the gas feeding pipeline 6 and the edge plate 13, the rear end of the gas feeding pipeline 6 is provided with a shade 7, the inside of the shade 7 is installed with a fan 8, a plurality of heating rings 9 are embedded in the inside of the gas feeding pipeline 6, the side edge of the gas feeding pipeline 6 is communicated with a hot gas channel 10, the top of the hot gas channel 10 is provided with a top part flow channel 11, the bottom end of the hot gas channel 10 is provided with a bottom part flow channel 12, the outside of the top part flow channel 11 and the bottom part flow channel 12 is provided with an air outlet hole 14, the top part flow channel 11 is parallel to the surface of the blade 1, and the bottom part flow channel 12 is parallel to the bottom of the blade 1. When icing occurs, the ice blocks are connected as a whole, so it is not easy to fall off. After the bending connection of the ice blocks is cut off by the edge heating assembly 3 and the independent middle heating assembly 4, the connection points between the ice blocks are eliminated, and the contact position between the ice blocks and the surface of the blade 1 is heated and melted, so that the ice blocks automatically slide off before they are completely melted, thereby improving the deicing efficiency. Specifically, during operation, the fan 8 blows air into the inside of the gas feeding pipeline 6, the air contacts the heating ring 9 to generate hot air, the hot air flows along the hot gas channel 10 to the top part flow channel 11 and the bottom part flow channel 12, and finally flows out of the air outlet hole 14 at the end. The position is close to the surface of the blade 1, so it can heat the edge of the blade 1 to achieve the effect of anti-icing. The inside of each air outlet hole 14 is installed with a gas valve film, which can prevent gas and liquid from flowing back into the blade 1.

[0060] As shown in the embodiment, Figure 3As shown, the middle heating assembly 4 includes a wire tube 17 and an electric heating plate 18, the rear end of the electric heating plate 18 is connected with the wire tube 17, the electric heating plate 18 and the wire tube 17 are integrally embedded on the shell at the top of the blade 1, the deicing assembly 5 is uniformly distributed on both sides of the middle heating assembly 4, the heat-conducting layer 16 is embedded on the top of the blade 1, the inner side of the heat-conducting layer 16 is attached to the surface of the electric heating plate 18, the edge heating assembly 3 and the independent middle heating assembly 4 are respectively used for targeted heating treatment of the side edge narrowing position and the middle bulging position of the blade 1, the hot air is used for heating the surface of the blade 1, the heating area is reduced, and the energy saving effect is realized. Specifically, the hot air at the edge heating assembly 3 and the heating block 15 cut off the ice at the edge, and the middle heating assembly 4 heats the point heating plate through the conductive structure inside the wire tube 17, so that the point heating plate is heated and warmed, and then the heat is transferred outward from the heat-conducting layer 16, the ice melting efficiency on the surface of the heat-conducting layer 16 is accelerated, and finally the ice is completely melted at the positions of the edge heating assembly 3 and the middle heating assembly 4.

[0061] As shown in the embodiment, Figure 4 and Figure 5 As shown, the deicing assembly 5 includes a top plate 19 and an impact hammer 31, the bottom end of the top plate 19 is provided with a first connecting rod 20 and a second connecting rod 22, the bottom of the first connecting rod 20 is provided with a traction spring 21, the bottom of the second connecting rod 22 is provided with a guide block 23, the inner side of the clamping groove 24 is provided with a through hole 25, the first connecting rod 20 and the second connecting rod 22 are inserted into the inner side of the recess 32 from the corresponding through hole 25, the end of the traction spring 21 is fixedly connected with the inner wall of the recess 32, the rear end of the top plate 19 is the same as the depth of the clamping groove 24, in the normal state, the traction spring 21 only shrinks the bottom end of the first connecting rod 20, so that the top of the top plate 19 is pressed in the inner side of the clamping groove 24, and the surface of the top plate 19 is kept flush with the surface of the blade 1, until the impact hammer 31 in the inner side of the recess 32 is in contact with the guide block 23 and operates after impact.

[0062] In this embodiment, refer to Figure 5The top of the impact hammer 31 is provided with a push rod 29, the push rod 29 passes through the middle of the guide bracket 30, the top of the push rod 29 is connected with a weight block 28, the inner side of the groove 32 is connected with a buffer spring 26, the end of the buffer spring 26 is provided with a buffer plate 27, the surfaces of the impact hammer 31 and the guide block 23 are provided with inclined surface structures, the inclined surfaces of the impact hammer 31 and the guide block 23 are aligned with each other, and the lengths of the impact hammer 31 and the guide block 23 are the same, in the process of heating and melting in cooperation with the edge heating assembly 3 and the independent middle heating assembly 4, by means of the deicing assembly 5 on the surface of the blade 1, the top plate 19 is protruded outward by switching the rotating state of the blade 1, so that the surface of the blade 1 is impacted, thereby further promoting the separation of the ice blocks, and the structure is uniformly dispersed on the surface of the blade 1, and the impact is also vertically outward, so that the blade 1 body is not damaged, since part of the blade 1 rotates in the process of wind power generation, when the top blade 1 rotates to the bottom, the impact hammer 31 is quickly pressed down by the centrifugal force generated and the weight block 28, until the inclined surface of the guide block 23 is contacted, the guide block 23 is pushed outwards, the top plate 19 is pushed outwards by the second connecting rod 22, so as to realize the impact and removal effect on the surface ice, after the impact is completed, with the continuous rotation of the blade 1, until the top, the impact hammer 31 and the weight block 28 can be moved away from the guide block 23 again, so as to facilitate the subsequent impact effect.

[0063] The wind turbine anti-icing protection device provided by the embodiment has the following advantages compared with the prior art.

[0064] 1. The wind turbine anti-icing protection device can heat the narrow part of the side of the blade and the position of the middle protrusion by the two edge heating assemblies and the independent middle heating assembly, so as to reduce the heating area and save energy.

[0065] 2. The wind turbine anti-icing protection device can cut off the bending connection of the ice blocks by the edge heating assembly and the independent middle heating assembly, so as to eliminate the connection points between the ice blocks and make the ice blocks automatically slide down before melting, thereby improving the deicing efficiency.

[0066] 3. The wind turbine anti-icing protection device can make the top plate protrude outward by switching the rotating state of the blade in the process of heating and melting in cooperation with the edge heating assembly and the independent middle heating assembly, so as to impact the surface of the blade and further promote the separation of the ice blocks.

[0067] The above embodiment is only one of the implementation manners of the technical scheme of the present application, and the scope of the present application is not limited to the above embodiment, but also includes any changes, substitutions and other implementation manners that are easily thought of by those skilled in the art within the technical scope disclosed by the present application.

Claims

1. A wind turbine anti-icing protection device, characterized in that, include: The wind turbine blade (1) is provided with a central heating component (4), an edge heating component (3) is provided on both sides of the cavity (2) of the blade (1), and a de-icing component (5) is provided on the outer surface of the blade (1). The de-icing component (5) can protrude outward relative to the outer surface of the blade (1) under the action of centrifugal force to remove ice from the outer surface of the blade (1). The de-icing assembly (5) includes a protruding mechanism and an impact mechanism; The protruding mechanism includes a top plate (19), which is located in the slot (24) of the blade (1); a first connecting rod (20) and a second connecting rod (22) are alternately arranged at the bottom of the top plate (19); a traction spring (21) is sleeved on the lower end of the first connecting rod (20); a guide block (23) is connected to the lower end of the second connecting rod (22); a through hole (25) is provided on the slot (24); the first connecting rod (20) and the second connecting rod (22) pass through the through hole (25) respectively, and their lower ends are both located in the groove (32) at the top of the cavity (2); the end of the traction spring (21) is fixedly connected to the inner wall of the groove (32); The impact mechanism includes a buffer spring (26), a buffer plate (27), a weight block (28), a push rod (29), and an impact hammer (31) connected in sequence; the buffer spring (26) is fixed on the inner wall of the groove (32); the impact hammer (31) is perpendicular to the guide block (23); The push rod (29) is fitted with a guide bracket (30), which is fixed to the inner wall of the groove (32). The contact surfaces of the impact hammer (31) and the guide block (23) are both inclined surfaces. When the impact hammer (31) and the guide block (23) are engaged, the two inclined surfaces are aligned with each other, and the impact hammer (31) and the guide block (23) have the same length.

2. The wind turbine anti-icing protection device according to claim 1, characterized in that, The edge heating assembly (3) includes an air supply pipe (6) inserted into the side of the cavity (2); one end of the air supply pipe (6) is connected to an air supply mechanism, and the other end is connected to a hot air circulation pipe, which is used to supply hot air to the top and bottom of the side of the blade (1) respectively.

3. The wind turbine anti-icing protection device according to claim 2, characterized in that, The air supply mechanism includes a shield (7) connected to one end of the air supply pipe (6), and a fan (8) is provided inside the shield (7); the hot air circulation pipeline includes a hot air channel (10) connected to the other end of the air supply pipe (6), and the hot air channel (10) is connected to a top diversion channel (11) and a bottom diversion channel (12); a plurality of heating rings (9) are arranged in an array in the air supply pipe (6).

4. The wind turbine anti-icing protection device according to claim 3, characterized in that, The top flow channel (11) and the bottom flow channel (12) are each provided with a plurality of air outlets (14), which are evenly distributed on the top and bottom sides of the blade (1); the top flow channel (11) is arranged parallel to the top surface of the blade (1), and the bottom flow channel (12) is arranged parallel to the bottom surface of the blade (1).

5. The wind turbine anti-icing protection device according to claim 1, characterized in that, The edge heating assembly (3) also includes an edge plate (13) disposed on the blade (1), and the side array of the edge plate (13) has a plurality of heating blocks (5).

6. The wind turbine anti-icing protection device according to claim 1, characterized in that, The central heating assembly (4) includes an electric heating plate (18) and a conduit (17) embedded in the housing at the top of the blade (1), and the conduit (17) is connected to the electric heating plate (18); multiple sets of de-icing assemblies (5) are arranged in an array on both sides of the central heating assembly (4).

7. The wind turbine anti-icing protection device according to claim 6, characterized in that, A heat-conducting layer (16) is embedded in the top protrusion of the blade (1), and the electric heating plate (18) is attached to the heat-conducting layer (16).

8. A method for preventing icing in wind turbine generators, based on the anti-icing protection device for wind turbine generators according to any one of claims 1-7, characterized in that, include: The edge heating component (3) and the middle heating component (4) are used to cut off and melt the bent joint of the ice block. The de-icing component (5) is used to make the de-icing component (5) bulge outward relative to the outer surface of the blade (1) by switching the rotation state of the blade (1) itself, thereby removing the ice on the outer surface of the blade (1).

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