Deicing device for fan blade

Abstract

The invention discloses a fan blade deicing device which comprises a fan blade, a blade root used for fixedly installing the fan blade, a deicing component arranged in the fan blade and the blade root and used for removing borneol condensed on the surface of the fan blade, a circulating cavity formed in the fan blade and a heating cavity formed in the blade root and communicated with the circulating cavity. The heating cavity is internally provided with a flowing fan used for guiding air flow to flow circularly and a densification assembly used for increasing the density of air in the circulating cavity. The deicing device has the beneficial effects that through the arrangement of the heating cavity and the circulating cavity, hot air continuously and circularly rotates in the fan blades, an ice layer outside the fan blades is heated through the heat transfer principle, deicing operation is completed, the density of gas in the circulating cavity is increased through the arrangement of the density increasing assembly, heat carried by gas in unit volume is increased, and the deicing effect is improved. The heating effect on the fan blades is improved, and the problems that in traditional gas heat deicing, the temperature of airflow at the tail ends of the fan blades is not high, and the deicing effect is poor are solved.

Description

Technical Field

[0001] This invention relates to the field of blade de-icing, and in particular to a wind turbine blade de-icing device. Background Technology

[0002] Wind power generation is a renewable energy technology that uses wind energy to convert into electricity. However, when the ambient temperature is below 0°C, supercooled water droplets in the air will hit the blade surface and freeze. The ice on the outside of the wind turbine blades will increase the weight and drag of the blades, resulting in a decrease in power generation efficiency. Therefore, when the ambient temperature is low, de-icing operations are carried out on the outside of the wind turbine blades.

[0003] Existing de-icing methods typically utilize the flow of hot air within the blade cavity. However, to achieve gas circulation and heating, the blade cavity is generally sealed, meaning the density of the heating gas within the cavity should normally be constant. But during actual gas flow, gas may leak out at flanges, welds, or valves, reducing the gas density within the blade cavity. This decreases the heat carried per unit volume of gas and reduces heat transfer efficiency. Therefore, we propose a wind turbine blade de-icing device. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing wind turbine blade de-icing device has low de-icing efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wind turbine blade de-icing device, which includes a fan blade and a blade root for fixing the fan blade, a de-icing component disposed inside the fan blade and the blade root for removing ice flakes condensed on the surface of the fan blade, including a circulation cavity opened inside the fan blade, and a heating cavity disposed inside the blade root and communicating with the circulation cavity, wherein the heating cavity is provided with a flow fan for guiding the airflow circulation and a densification component for increasing the gas density in the circulation cavity.

[0006] As a preferred embodiment of the de-icing device for wind turbine blades of the present invention, wherein: a heating resistance wire is provided on the blade root and surrounds the heating chamber; the heating chamber includes an air inlet chamber and an air outlet chamber opened inside the blade root; a flow chamber for airflow communication is provided between the air inlet chamber and the air outlet chamber; and a flow fan is arranged in the flow chamber.

[0007] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, the air inlet chamber and the air outlet chamber are both connected to the circulation chamber, and a sealing plate is rotatably installed at the connection between the air inlet chamber and the circulation chamber, and a reset torsion spring fixedly connected to the air inlet chamber is provided at the rotatable part of the sealing plate.

[0008] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, the densification component includes an air inlet disposed in the air inlet chamber for communicating with the outside, and a filter screen is provided at the end of the air inlet away from the air inlet chamber. A sealing member for sealing the air inlet is provided inside the air inlet. A first driving member and a second driving member for controlling the opening and closing of the sealing member are respectively provided in the air inlet chamber.

[0009] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, the sealing component includes a sealing blade rotatably installed at the air inlet, a sealing gear is coaxially fixed on the sealing blade, and a sealing gear ring is externally meshed with the sealing gear and rotatably connected to the air inlet chamber.

[0010] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, the first driving component includes a first driving sleeve disposed inside the air inlet chamber, a first driving gear that meshes with the outer teeth of the closed gear ring is fixedly sleeved on the outside of the first driving sleeve, a first spiral guide groove is opened inside the first driving sleeve, and a first guide rod is slidably installed in the first spiral guide groove.

[0011] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, wherein: a first connecting rod is fixedly installed at the end of the first guide rod away from the first spiral guide groove and slidably connected to the first drive sleeve; a first reset magnet is provided at the bottom of the first drive sleeve and attracts the first connecting rod; and a floating cylinder is provided in the flow cavity near the air inlet chamber and fixedly connected to the first connecting rod.

[0012] In a preferred embodiment of the wind turbine blade de-icing device of the present invention, the second driving component is sequentially equipped with a second driving sleeve, a second driving gear, a second spiral guide groove, a second guide rod, a second connecting rod, and a second reset magnet, in the same manner as the first driving component. The sealing plate is rotatably mounted on the side near the air inlet chamber with a traction magnet that attracts the second connecting rod.

[0013] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, the de-icing component further includes an ice-breaking assembly disposed in the circulation chamber. The ice-breaking assembly includes an ice-breaking blade rotatably installed in the circulation chamber, and a plurality of telescopic cavities are opened at the center of the ice-breaking blade. A rubber rod that impacts the inner wall of the circulation chamber is slidably installed in the telescopic cavity.

[0014] As a preferred embodiment of the wind turbine blade de-icing device of the present invention, an ice-breaking ring is fixedly installed on one side of the ice-breaking blade near the center of the blade, and a continuous annular corrugated groove is provided on the outside of the ice-breaking ring, and an ice-breaking connecting rod fixedly connected to a rubber rod is slidably installed in the annular corrugated groove.

[0015] The beneficial effects of the wind turbine blade de-icing device of the present invention are as follows: by setting up a heating chamber and a circulation chamber, hot air is continuously circulated inside the fan blade, and the ice layer on the outside of the fan blade is heated by the principle of heat transfer to complete the de-icing operation. Furthermore, by setting up a densification component, the gas density in the circulation chamber is increased, thereby increasing the heat carried by the gas per unit volume and improving the heating effect on the fan blade. This solves the problem that the airflow temperature at the tail end of the fan blade is not high and the de-icing effect is poor in traditional gas-heat de-icing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0017] Figure 1 A schematic diagram of the cross-sectional structure of the fan blade in the invention is shown;

[0018] Figure 2 It shows Figure 1 Enlarged structural diagram of region A in the middle;

[0019] Figure 3 It shows Figure 1 Enlarged structural diagram of region B in the middle;

[0020] Figure 4 A schematic diagram of the split structure of the densification component in the invention is shown;

[0021] Figure 5 A schematic diagram of the disassembled structure of the ice-breaking component in the invention is shown;

[0022] Figure 6 A cross-sectional view of the first and second drive components in the invention is shown.

[0023] 1. Fan blade; 2. Blade root; 3. De-icing component; 31. Circulation chamber; 32. Heating chamber; 321. Air inlet chamber; 322. Air outlet chamber; 33. Heating resistance wire; 34. Flow chamber; 35. Sealing plate; 36. Reset torsion spring; 37. Densification component; 371. Air inlet; 372. Filter screen; 373. Sealing component; 3731. Sealing blade; 3732. Sealing gear; 3733. Sealing gear ring; 374. First driving component; 3741. First driving sleeve; 3742. First driving gear; 3743. First spiral guide groove; 3744. First... 3745. Guide rod; 3746. First connecting rod; 3747. First reset magnet; 3748. Floating cylinder; 375. Second driving component; 3751. Second driving sleeve; 3752. Second driving gear; 3753. Second spiral guide groove; 3754. Second guide rod; 3755. Second connecting rod; 3756. Second reset magnet; 3757. Traction magnet; 38. Ice-breaking assembly; 381. Ice-breaking blade; 382. Telescopic cavity; 383. Rubber rod; 384. Ice-breaking ring; 385. Annular corrugated groove; 386. Ice-breaking connecting rod; 39. Flowing fan. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0026] This embodiment provides a de-icing device for wind turbine blades, such as Figure 1 As shown, the fan blade 1 and the blade root 2 are respectively provided with a circulating cavity 31 and a heating cavity 32 that are interconnected. The heating cavity 32 is surrounded by a heating resistance wire 33 and a flow fan 39 for guiding the airflow is installed inside.

[0027] Therefore, when the ambient temperature is below zero degrees Celsius, the operator can first activate the resistance wire fixed around the outside of the heating chamber 32 to heat the air in the heating chamber 32, and simultaneously activate the flow fan 39 in the heating chamber 32 to guide the airflow in the heating chamber 32 into the circulation chamber 31, such as... Figure 1As shown, the circulation chamber 31 is U-shaped, so the airflow in the circulation chamber 31 will eventually return to the circulation chamber 31 via the heating chamber 32. This process repeats, and under the action of the flow fan 39, a circulating heated airflow appears in the circulation chamber 31 and the heating chamber 32. The heat from the heating resistance wire 33 in the heating chamber 32 is carried to various positions in the circulation chamber 31, causing the ice layer on the surface of the fan blade 1 to melt. This reduces the weight of the fan blade 1 and the resistance it experiences during operation, thereby improving the power generation efficiency. Moreover, when the airflow flows in the circulation chamber 31 and the heating chamber 32, it will come into contact with the inner walls of the circulation chamber 31 and the heating chamber 32, resulting in friction and other interactions. Therefore, some of the mechanical energy of the airflow movement will be converted into heat energy and transferred out, further improving the melting effect of the ice layer on the outside of the fan blade 1.

[0028] Combination Figure 2 and Figure 3 As can be seen, the heating chamber 32 consists of an air inlet chamber 321 and an air outlet chamber 322. A flow chamber 34 for airflow communication is provided between the air inlet chamber 321 and the air outlet chamber 322. Both the air inlet chamber 321 and the air outlet chamber 322 are connected to the circulation chamber 31. At the same time, a sealing plate 35 for sealing the air inlet chamber 321 and the circulation chamber 31 is rotatably installed at the connection between the air inlet chamber 321 and the circulation chamber 31. A return torsion spring 36 fixedly connected to the air inlet chamber 321 is also provided at the rotatable part of the sealing plate 35. Therefore, the sealing plate 35 is connected to the air inlet chamber 321 through the return torsion spring 36. The air inlet chamber 321 is elastically hinged, and a densification component 37 is also provided in the air inlet chamber 321 to increase the gas density in the circulation chamber 31 and the heating chamber 32. Therefore, when the flow fan 39 is running, the air in the air inlet chamber 321 is first introduced into the circulation chamber 31 through the outlet chamber 322 via the flow chamber 34. At this time, the densification component 37 installed in the air inlet chamber 321 will open, introducing outside air into the air inlet chamber 321, and under the action of the flow fan 39, it is introduced into the circulation chamber 31, thereby increasing the density of the air. The gas density in the circulation chamber 31 and heating chamber 32 is increased, thereby increasing the heat carried by the gas per unit volume and enhancing the heating effect on the fan blade 1. This solves the problem of low airflow temperature at the tail end of the fan blade 1 and poor de-icing effect in traditional gas-heated de-icing. Finally, the gas in the circulation chamber 31 will accumulate on the side of the sealing plate 35 near the circulation chamber 31. When the gas pressure in the circulation chamber 31 is greater than the elastic potential energy of the reset torsion spring 36, it will push the sealing plate 35 to rotate towards the air inlet chamber 321, allowing the airflow to circulate in the circulation chamber 31 and heating chamber 32. This will cause the densification component 37 to close, forming a sealed space between the heating chamber 32 and the circulation chamber 31, preventing heat from escaping from the installation point of the densification component 37, and further enhancing the de-icing effect. After heating is completed, the flow fan 39 is turned off. At this time, the sealing plate 35, which lacks airflow, will automatically reset under the action of the reset torsion spring 36. During the reset process, the sealing plate 35 will also briefly open the densification component 37 to discharge some of the air in the air inlet chamber 321.

[0029] from Figure 2 and Figure 3 As can be seen, the air outlet chamber 322 is also provided with an air inlet 371 for connecting the air inlet chamber 321 with the outside. The air inlet 371 is provided with a sealing member 373, which can control the connection and isolation between the air inlet chamber 321 and the outside by opening and closing. At the same time, the air inlet chamber 321 is also provided with a first driving member 374 and a second driving member 375 for controlling the operation of the sealing member 373.

[0030] like Figure 4 As shown, the sealing member 373 includes a sealing blade 3731 for isolating the air inlet 371, and the sealing blade 3731 is rotatably connected to the air inlet 371. A sealing gear 3732 is also coaxially fixed on the sealing blade 3731. A sealing gear ring 3733 that is rotatably connected to the air inlet chamber 321 is sleeved on the outside of the sealing gear 3732. Therefore, rotating the sealing gear ring 3733 can drive the sealing gear 3732 to rotate through the meshing of the teeth. Since the sealing gear 3732 is coaxially fixed with the sealing blade 3731, the sealing blade 3731 can be driven to run synchronously when the sealing gear 3732 rotates, so as to realize the opening and closing of the air inlet 371.

[0031] Combination Figure 4 and Figure 6 It can be seen that a first drive sleeve 3741 is rotatably installed in the air inlet chamber 321. A first drive gear 3742 that meshes with the external teeth of the closed gear ring 3733 is fixedly sleeved on the outside of the first drive sleeve 3741. At the same time, a first spiral guide groove 3743 is also opened inside the first drive sleeve 3741. A first guide rod 3744 is slidably installed in the first spiral guide groove 3743. A first connecting rod 3745 that is slidably connected to the first drive sleeve 3741 is fixedly installed at the end of the first guide rod 3744 away from the first spiral guide groove 3743.

[0032] Therefore, the first connecting rod 3745 can drive the first driving sleeve 3741 to rotate through the cooperation of the first guide rod 3744 and the first spiral guide groove 3743. Since the first driving gear 3742 is fixedly sleeved on the outside of the first driving sleeve 3741, and the first driving gear 3742 meshes with the outer teeth of the closed gear ring 3733, when the first driving sleeve 3741 rotates, it will drive the rotation of the closed gear ring 3733 through the first driving gear 3742, thereby realizing the control of the opening and closing of the air inlet 371.

[0033] Combination Figure 3 and Figure 4As can be seen, a floating cylinder 3747 fixed to the first connecting rod 3745 is provided in the flow cavity 34, and the floating cylinder 3747 has a conical structure. The external dimensions of the floating cylinder 3747 decrease sequentially in the direction away from the flow cavity 34. Therefore, when the flow fan 39 starts running, the air in the air inlet chamber 321 will flow through the flow cavity 34 to the air outlet chamber 322. When the airflow in the air inlet chamber 321 flows through the flow cavity 34, it will be lifted by the conical surface of the floating cylinder 3747, so that the floating cylinder 3747... The floating cylinder 3747 moves closer to the air outlet 322 in the flow cavity 34. Since the floating cylinder 3747 is fixed to the first connecting rod 3745, when the floating cylinder 3747 rises, it will synchronously drive the first connecting rod 3745 to move upward. Then, through the mechanical transmission between the first guide rod 3744, the first spiral guide groove 3743, the first drive sleeve 3741 and the first drive gear 3742, the sealing member 373 will open and close, so that the outside air can enter the air inlet 321 through the air inlet 371, thereby increasing the gas density in the heating cavity 32.

[0034] like Figure 6 As shown, a first reset magnet 3746 is fixedly installed at the bottom of the first drive sleeve 3741, while the first connecting rod 3745 is made of iron and attracts the first reset magnet 3746. Therefore, under normal conditions, the first connecting rod 3745 is attracted to the bottom of the first drive sleeve 3741 by the action of the first reset magnet 3746, causing the seal to be in a closed state, isolating the air inlet 371, and preventing external impurities from entering the heating chamber 32, thus improving the protection of the internal components of the heating chamber 32. Simultaneously, from... Figure 2 As can be seen, a filter 372 is fixedly installed at the air outlet where it connects to the outside. The installation of the filter 372 can prevent impurities from the outside from being carried into the air inlet chamber 321 when the airflow enters the heating chamber 32.

[0035] Combination Figure 4 and Figure 6It can also be seen that the second driving component 375 is installed in the same manner as the first driving component 374, consisting of a second driving sleeve 3751, a second driving gear 3752, a second spiral guide groove 3753, a second guide rod 3754, a second connecting rod 3755, and a second reset magnet 3756. Therefore, when the first connecting rod 3745 rises, the second connecting rod 3755 also rises synchronously under the action of the second driving sleeve 3751, the second driving gear 3752, the second spiral guide groove 3753, and the second guide rod 3754. When the sealing plate 35 rotates open, the second connecting rod 3755 will be pressed and pushed downward by the traction magnet 3757 rotatably mounted on the sealing plate 35. When the second connecting rod 3755 descends, it drives the second drive sleeve 3751 to rotate through the cooperation of the second guide rod 3754 and the second spiral guide groove 3753. Since the second drive gear 3752 is fixedly sleeved on the second drive sleeve 3751 and meshes with the outer teeth of the sealing gear ring 3733, when the second drive sleeve 3751 rotates, the meshing of the second drive gear 3752 with the sealing gear ring 3733 will drive the sealing gear ring 3733 to reverse, thereby achieving the closure of the sealing member 373. This creates a sealed space between the heating chamber 32 and the circulation chamber 31, preventing heat from overflowing from the installation point of the densification component 37 and affecting the de-icing effect.

[0036] Since the second connecting rod 3755 is also made of iron, and the elastic potential energy of the reset torsion spring 36 is greater than the attraction force between the traction magnet 3757 and the first connecting rod 3745, after the sealing plate 35 is reset, the sealing plate 35 will drive the second connecting rod 3755 to rise through the traction magnet 3757 during the reset process. The second driving component 375 controls the opening of the sealing component 373 to discharge some of the air in the air inlet chamber 321. During the discharge process, the airflow will blow away the impurities adsorbed on the filter screen 372 to prevent them from clogging the filter screen 372 and affecting the next air intake of the air inlet chamber 321.

[0037] Combination Figure 1 and Figure 5As can be seen, an ice-breaking assembly 38 for assisting de-icing is installed in the circulation chamber 31. The ice-breaking assembly 38 includes an ice-breaking blade 381 rotatably installed in the circulation chamber 31. Several telescopic cavities 382 are also formed in the center of the ice-breaking blade 381, and rubber rods 383 for impacting the inner wall of the circulation chamber 31 are slidably installed in the telescopic cavities 382. In addition, an ice-breaking ring 384 is fixedly installed in the circulation chamber 31. The surface of the ice-breaking ring 384 is formed with an annular corrugated groove 385, and a rubber rod 383 for impacting the inner wall of the circulation chamber 31 is slidably installed in the annular corrugated groove 385. The ice-breaking connecting rod 386 is fixed by the rubber rod 383. Therefore, during the airflow in the circulation chamber 31, the ice-breaking blade 381 will rotate under the action of the airflow, which will drive the ice-breaking connecting rod 386 fixed to the rubber rod 383 to move in the annular corrugated groove 385. Under the action of the annular corrugated groove 385, the rubber rod 383 will move up and down reciprocatingly in the telescopic chamber 382, ​​thereby achieving the effect of continuously hitting the inner wall of the circulation chamber 31 during the de-icing of the fan blade 1, accelerating the shedding of the ice layer on the surface of the fan blade 1, and improving the de-icing effect.

[0038] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A wind turbine blade de-icing apparatus, characterised in that: The utility model relates to a fan blade (1) and a blade root (2) for the fixed installation of the fan blade (1), and a deicing component (3) arranged inside the fan blade (1) and the blade root (2) for removing the ice pieces condensed on the surface of the fan blade (1), comprising a circulating cavity (31) opened inside the fan blade (1) and a heating cavity (32) arranged inside the blade root (2) and communicated with the circulating cavity (31), wherein the heating cavity (32) is provided with a flow fan (39) for guiding the circulating flow of air and a densification assembly (37) for increasing the density of the air in the circulating cavity (31). The blade root (2) is provided with a heating resistance wire (33) surrounding the outside of the heating cavity (32), and the heating cavity (32) comprises an air inlet chamber (321) and an air outlet chamber (322) opened inside the blade root (2), wherein a flow-through cavity (34) for air flow communication is arranged between the air inlet chamber (321) and the air outlet chamber (322), and the flow fan (39) is arranged in the flow-through cavity (34). The air inlet chamber (321) and the air outlet chamber (322) are both communicated with the circulating cavity (31), and a blocking plate (35) is rotatably arranged at the communication part of the air inlet chamber (321) and the circulating cavity (31), and a reset torsional spring (36) is fixedly connected with the air inlet chamber (321) at the rotation part of the blocking plate (35).

2. The wind turbine blade de-icing apparatus of claim 1, wherein: The densification assembly (37) comprises an air inlet (371) arranged in the air inlet chamber (321) for the air inlet chamber (321) to communicate with the outside, and a filter screen (372) is arranged at the end of the air inlet (371) away from the air inlet chamber (321), wherein a blocking piece (373) is arranged inside the air inlet (371) for blocking the air inlet (371), and the air inlet chamber (321) is respectively provided with a first driving piece (374) and a second driving piece (375) for controlling the opening and closing of the blocking piece (373).

3. A wind turbine blade de-icing arrangement according to claim 2, characterised in that: The blocking piece (373) comprises a blocking vane (3731) rotatably arranged at the air inlet (371), and a blocking gear (3732) is coaxially fixed on the blocking vane (3731), and a blocking gear ring (3733) rotatably connected with the air inlet chamber (321) is engagedly sleeved outside the blocking gear (3732).

4. The wind turbine blade de-icing arrangement of claim 3, wherein: The first driving piece (374) comprises a first driving sleeve (3741) arranged inside the air inlet chamber (321), a first driving gear (3742) engaged with the external teeth of the blocking gear ring (3733) is fixedly sleeved outside the first driving sleeve (3741), a first spiral guide groove (3743) is opened inside the first driving sleeve (3741), and a first guide rod (3744) is slidably arranged in the first spiral guide groove (3743).

5. A wind turbine blade de-icing arrangement according to claim 4, characterised in that: ​ 6. The wind turbine blade de-icing arrangement according to claim 5, characterised in that: ​ 7. A wind turbine blade de-icing arrangement according to claim 6, characterised in that: The first guide rod (3744) is fixedly installed at one end away from the first spiral guide groove (3743) with a first connecting rod (3745) that is slidably connected to the first drive sleeve (3741). The bottom of the first drive sleeve (3741) is provided with a first reset magnet (3746) that attracts the first connecting rod (3745). A floating cylinder (3747) that is fixedly connected to the first connecting rod (3745) is provided in the flow cavity (34) near the air inlet chamber.

8. A wind turbine blade de-icing arrangement according to claim 7, characterised in that: The second drive component (375) is installed in sequence with the second drive sleeve (3751), the second drive gear (3752), the second spiral guide groove (3753), the second guide rod (3754), the second connecting rod (3755), and the second reset magnet (3756) in the same way as the first drive component (374). The sealing plate (35) is rotatably installed with a traction magnet (3757) that attracts the second connecting rod (3755) on the side near the air intake chamber.

9. The wind turbine blade de-icing apparatus of claim 1, wherein: The de-icing component (3) further includes an ice-breaking assembly (38) disposed in the circulation chamber (31). The ice-breaking assembly (38) includes an ice-breaking blade (381) rotatably installed in the circulation chamber (31), and a plurality of telescopic cavities (382) are opened at the center of the ice-breaking blade (381). A rubber rod (383) that impacts the inner wall of the circulation chamber (31) is slidably installed in the telescopic cavity (382).

10. A wind turbine blade de-icing arrangement according to claim 9, characterised in that: An ice-breaking ring (384) is fixedly installed on one side of the ice-breaking blade (381) near the center of the fan blade (1), and a continuous annular corrugated groove (385) is opened on the outside of the ice-breaking ring (384). An ice-breaking connecting rod (386) fixed to the rubber rod (383) is slidably installed in the annular corrugated groove (385).

Images