Wind turbine generator blade anti-icing device and anti-icing method

Abstract

The invention relates to a wind turbine generator blade anti-icing device and an anti-icing method, and relates to the technical field of wind turbine generator blades, the anti-icing device comprises a deicing mechanism, and the deicing mechanism comprises a plurality of sliding parts which are arranged on a plurality of blades in a sliding and sleeving mode; the limiting assembly is used for limiting the multiple sliding parts; the counterweight assembly pushes the sliding part to move under the action of gravity; and the ice crushing assembly moves downwards under the action of the counterweight assembly so as to crush the ice covering the blades. The ice on the blade is removed through cooperation of the sliding part, the ice crushing assembly, the counterweight assembly and the limiting assembly, the removing effect and efficiency of the ice on the blade are improved, other energy sources are not needed for driving, energy sources are greatly saved, the ice on the blade is crushed in time through the ice crushing assembly, the ice on the blade does not form a whole, and the ice removing efficiency is improved. And the crushing difficulty and the size of the crushed ice blocks are greatly reduced, and the safety risk caused by falling of the ice blocks is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine blades, and in particular to an anti-icing device and an anti-icing method for wind turbine blades. Background Art

[0002] Most wind turbines are installed in some plateau areas. Blades are one of the key components of wind turbines. When the external ambient temperature in plateau areas is low, freezing weather often occurs, especially in rainy or snowy weather conditions in winter. Ice accumulates on the surface of wind turbine blades and freezes inside the blades, resulting in changes in the aerodynamic performance of wind turbine blades and affecting the normal operation of the power system. Therefore, it is necessary to clean the ice on the wind turbine blades.

[0003] The general cleaning method is to heat the air in the inner cavity of the blade with a heater, and then blow the hot air to circulate in the inner cavity of the blade under the action of the blower, transferring the heat to the surface of the blade, so that the ice on the surface of the blade gradually melts and falls off. This de-icing method that relies on heating is slow and consumes a lot of energy. At the same time, this type of heating does not melt all the ice into liquid and then leave the surface of the blade, but melts the part where the ice layer contacts the blade, causing it to lose its adsorption force with the blade surface, causing the entire ice block to fall off in its original shape. Due to the large size of the ice, there are certain safety hazards. Summary of the invention

[0004] In order to speed up the removal efficiency of ice, reduce energy consumption and reduce the safety risks caused by falling ice, the present application provides an anti-icing device and an anti-icing method for wind turbine blades.

[0005] In a first aspect, the present application provides a wind turbine blade anti-icing device, which adopts the following technical solution: A wind turbine blade anti-icing device includes a deicing mechanism, which is used to remove ice on blades that are rotated on a body through a rotating shaft. The deicing mechanism includes: A plurality of sliding members are respectively and slidably sleeved on the plurality of blades; A limiting assembly, which is arranged on the machine body and connected to the sliding member and is used to limit the plurality of sliding members; A counterweight assembly is disposed on the sliding member and pushes the sliding member to move under the action of gravity; The ice crushing assembly is arranged on the sliding member and moves downward under the action of the counterweight assembly to crush the ice covering the blades.

[0006] By adopting the above technical solution, the rotation of the rotating shaft drives the blades and the sliding member to rotate simultaneously. When the blades and the sliding member rotate to below the axis of the rotating shaft, the sliding member is initially located at the top of the blade, and the sliding member moves downward and away from the rotating shaft under the action of the counterweight assembly. The sliding member moves downward under the action of the counterweight assembly, and the movement of the sliding member drives the ice crushing assembly to move downward to crush and remove the ice on the blades until the sliding member moves down to the bottom of the blade, that is, the end of the blade away from the rotating shaft, and is limited by the sliding member against the limit assembly.

[0007] Then, as the blades rotate, the blades and the sliding member rotate above the axis of the rotating shaft, and the sliding member moves downward close to the rotating shaft under the action of the counterweight assembly, and the sliding member and the ice crushing assembly move back under the action of the counterweight assembly. The ice crushing assembly can continue to crush and remove the ice on the blades until the sliding member abuts against the limit assembly for limit, and then repeats the crushing and ice removal.

[0008] The ice on the blades can be removed by the cooperation of sliding parts, ice crushing assemblies, counterweight assemblies and limit assemblies. Compared with the prior art, the present application can also remove ice on multiple surfaces of the blades or even on all surfaces, thereby improving the effect of removing ice and accelerating the efficiency of removing ice on the blades. The ice can be removed by rotating the blades, so the ice on the blades can be removed in time, reducing the risk of ice on the blades agglomerating or even forming a whole that is difficult to remove, improving the effect and efficiency of removing ice on the blades, and no other energy is required to drive it, which greatly saves energy. In addition, the ice crushing assembly breaks the ice on the blades in time, and the ice on the blades has not formed a whole, which greatly reduces the difficulty of breaking and the size of the ice after breaking, thereby reducing the safety risks caused by falling ice.

[0009] Although the rotation speed of the wind turbine blades is relatively slow, the rotation of the blades can also generate a certain centrifugal force, so that when the sliding member rotates to the bottom of the rotating shaft, the centrifugal force also makes the sliding member move down faster, and when the sliding member moves back close to the rotating shaft, the ice has been removed, so that the sliding member can move back quickly under the action of the counterweight assembly, and when the sliding member moves back, it also drives the ice crushing assembly to move back, so that the ice crushing assembly can crush the ice again, so that the ice that has not been cleaned up can continue to be crushed, thereby further improving the removal effect and efficiency of the ice on the blades, greatly saving energy, and reducing the safety risks caused by falling ice.

[0010] Optionally, the limiting component includes: The limiting ring and the limiting member are respectively arranged on the machine body and on one end of the blade away from the machine body, and the sliding member abuts against the limiting ring or the limiting member for positioning.

[0011] By adopting the above technical solution, the sliding ring moves down close to the rotating shaft and abuts against the limit ring for positioning, and the sliding part moves down away from the rotating shaft and abuts against the limit part for positioning, thereby ensuring that the sliding part moves to drive the ice crushing assembly to crush the ice on the blades, thereby improving the efficiency of removing ice on the blades, greatly reducing the difficulty of crushing and the size of ice cubes after crushing, and reducing the safety risks caused by falling ice cubes.

[0012] Optionally, the limiting ring is provided with an adsorption component, the body is provided with a pushing mechanism, and the adsorption component includes: The electromagnetic ring is mounted on the limit ring for rotation around the axis of the rotating shaft; A tension spring is arranged on a limit ring and connected to an electromagnetic ring; when the sliding member rotates to above the axis of the rotating shaft, it moves downward under the action of gravity and abuts against the limit ring for positioning, and the sliding member rotates and abuts against the electromagnetic ring. After the electromagnetic ring is energized, it is adsorbed on the sliding member and rotates and stretches the tension spring under the action of the sliding member; when the sliding member rotates to below the axis of the rotating shaft, the sliding member moves to the pushing mechanism, and the pushing mechanism starts to push the sliding member downward, and the electromagnetic ring is powered off, causing the sliding member to move downward under the action of gravity and thrust.

[0013] By adopting the above technical scheme, the sliding part moves down and approaches the rotating shaft and abuts against the limit ring for positioning, and then the blade rotates to drive the sliding part to rotate, so that the sliding part rotates to the electromagnetic ring and abuts against the electromagnetic ring. After the electromagnetic ring is energized, it is adsorbed on the sliding part for positioning, and the blade rotation drives the sliding part to rotate, and the sliding part rotation drives the electromagnetic ring to rotate to stretch the tension spring. When the sliding part rotates below the axis of the rotating shaft, the sliding part rotates to the pushing mechanism, the electromagnetic ring is powered off, and the pushing mechanism is started to push the sliding part downward under the action of elastic force, so that the sliding part accelerates downward under the dual action of the gravity and thrust of the gravity component, thereby greatly improving the efficiency of ice removal.

[0014] At the same time, when the sliding member is separated from the electromagnetic ring, the electromagnetic ring moves back under the action of the tension spring, and the return movement of the electromagnetic ring will also push the sliding member to move downward. In addition, the electromagnetic ring positions the sliding member, reducing the risk of the sliding member moving downward away from the pushing mechanism under the action of gravity before the pushing mechanism pushes it, making the sliding member closer to the pushing mechanism, thereby greatly improving the thrust of the pushing mechanism on the sliding member, further improving the efficiency of removing ice, and reducing the safety risks caused by falling ice.

[0015] Optionally, the pushing mechanism includes: A push ring is slidably arranged on the machine body in a direction approaching or moving away from the sliding member; A push spring is arranged on the machine body and the push ring; The positioning assembly is used to position the push ring. When the sliding member rotates to the bottom of the rotating shaft, the positioning assembly is unlocked and the push ring pushes the sliding member downward under the action of the push spring and can drive the push ring to squeeze the push spring back to its original position.

[0016] By adopting the above technical solution, the positioning assembly positions the push ring, and the push spring is in a compressed state. When the sliding part rotates to the bottom of the rotating shaft and the push ring, the positioning assembly is unlocked and the electromagnetic ring is powered off. The push ring quickly pushes the sliding part downward under the action of the push spring, and the gravity effect of the counterweight assembly on the sliding part makes the sliding part move downward faster, thereby improving the efficiency of removing ice and reducing the safety risks caused by falling ice.

[0017] Then the positioning component starts driving and pushes the ring back to the original position for positioning, so as to facilitate the subsequent pushing of the sliding member to move.

[0018] Optionally, the positioning component includes: A pressure plate is arranged on the electromagnetic ring and pressed against the push ring for positioning. A through hole for the push ring to pass through is provided at the connection between the pressure plate and the electromagnetic ring. When the push ring pushes the sliding member to move downward, the sliding member is installed on the through hole and can prevent the pressure plate from moving back. A telescopic member, arranged on the machine body; The push plate is arranged on the piston rod of the telescopic member and is pressed against the push ring and is used for driving the push ring to move.

[0019] By adopting the above technical solution, the electromagnetic ring moves back to its original position under the action of the tension spring, and the movement of the electromagnetic ring drives the pressure plate to move, so that the passage hole and the pushing ring are misaligned, that is, the pressure plate presses on the pushing ring for positioning, and at the same time, the telescopic part drives the push plate to press against the pushing ring for positioning. The movement of the electromagnetic ring drives the pressure plate to move. Since the push plate can position the pushing ring, the pressure between the pressure plate and the pushing ring is greatly reduced, and the resistance to the rotation of the pressure plate, the electromagnetic ring and the sliding part is reduced, so that the sliding part rotation drives the electromagnetic ring and the pressure plate to rotate more conveniently and stably.

[0020] When the sliding member rotates to a horizontal state, the telescopic member drives the push plate away from the push ring to unlock. At this time, the push ring and the through hole are still in a misaligned state, that is, the pressure plate presses on the push ring to continue positioning, and then the sliding member continues to rotate and rotates below the axis of the rotating shaft and the push ring. At this time, the through hole is aligned with the push ring, and the push ring can slide and be installed on the through hole under the action of the elastic force of the push spring, so that the push ring can quickly push the sliding member out under the action of the push spring.

[0021] The pushing ring is slidably installed in the passage hole to position the pressure plate and the electromagnetic ring, and then the telescopic part starts to drive the pushing plate to push the pushing ring back to its original position, so that the pushing ring moves out of the passage hole, and the pressure plate and the electromagnetic ring can move back to their original positions under the action of the tension spring, and the pressure plate also rests on the pushing ring for positioning, and then the process is repeated, thereby pushing the next sliding part down, which greatly improves the convenience of the pushing process and the thrust on the sliding part, improves the efficiency of removing ice, and reduces the safety risks caused by falling ice.

[0022] Optionally, the counterweight assembly includes: The first counterweight block and the second counterweight block are arranged on two opposite outer side walls of the sliding member and are used for counterweighting the sliding member.

[0023] By adopting the above technical solution, counterweight block one and counterweight block two cooperate to counterweight the sliding member, and counterweight block one and counterweight block two are located on the opposite side walls of the sliding member, so that the downward gravity exerted on the sliding member is more uniform, reducing the risk of the sliding member getting stuck due to uneven force when moving downward, improving the efficiency of removing ice, and reducing the safety risks caused by falling ice.

[0024] Optionally, the ice crushing component includes: A plurality of long ice-crushing plates and a plurality of short ice-crushing plates are arranged on the sliding member at intervals and have different lengths. The short ice-crushing plate is located between two adjacent long ice-crushing plates and is used to crush the covered ice.

[0025] By adopting the above technical solution, multiple long ice crushing plates and multiple short ice crushing plates are cooperated to break the ice. At the same time, the structure of different lengths can greatly reduce the resistance encountered in concentrated breaking of the ice, making the ice easier to break, improving the efficiency of ice removal, and reducing the safety risks caused by falling ice.

[0026] Optionally, a plurality of balls rolling on the blades are arranged at intervals on the inner side wall of the sliding member.

[0027] By adopting the above technical solution, the ball bearings greatly reduce the resistance to the sliding member. Furthermore, the blades are irregular in shape. Through the design of the ball bearings, the interior of the sliding member can better adapt to the shape of the blades, further reducing the resistance generated during movement, improving the efficiency of ice removal, and reducing the safety risks caused by ice falling. At the same time, when the ball bearings roll on the blades, the ball bearings can also squeeze and crush the ice that comes into contact with them, further improving the efficiency of ice removal and reducing the safety risks caused by ice falling.

[0028] Optionally, the sliding member is formed by two sliding plates being buckled together and fixed by screws.

[0029] By adopting the above technical solution, the sliding part is a wearing part, so it is easier to replace.

[0030] In a second aspect, the present application provides a method for preventing icing of wind turbine blades, which adopts the following technical solution: A method for preventing ice accumulation on blades of a wind turbine generator system comprises the following steps: The blades rotate to drive the sliding member to rotate simultaneously; The sliding member rotates to below the axis of the rotating shaft, and the pushing mechanism pushes the sliding member downward, so that the sliding member moves downward under the action of the thrust and the gravity of the counterweight assembly, and the ice crushing assembly moves downward to remove the covered ice until it abuts against the limiting member for positioning; The sliding part moves to the top of the axis of the rotating shaft, and the sliding part moves back under the action of gravity. The ice crushing assembly moves back to continue to remove the ice on the blades until it abuts against the limit ring for positioning, and then repeats to continuously remove the ice on the blades. By adopting the above technical solution, the rotation of the blade drives the sliding member to rotate simultaneously; the sliding member rotates below the axis of the rotating shaft, and the pushing mechanism pushes the sliding member downward, so that the sliding member moves downward under the action of the thrust and the gravity of the counterweight assembly, and the ice crushing assembly moves downward to remove the ice until it abuts against the limit ring for positioning; the sliding member rotates above the axis of the rotating shaft, and the sliding member moves back under the action of gravity, and the ice crushing assembly moves back to continue to remove the ice on the blade until it abuts against the limit ring for positioning, and then the ice on the blade is repeatedly removed, thereby improving the efficiency of ice removal and reducing the safety risks caused by falling ice.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. The ice on the blades can be removed by the cooperation of the sliding parts, ice crushing components, counterweight components and limit components, which improves the effect and efficiency of removing ice on the blades. No other energy is required to drive it, which greatly saves energy. In addition, the ice crushing components can break the ice on the blades in time, and the ice on the blades has not formed a whole, which greatly reduces the difficulty of breaking and the size of the ice after breaking, and reduces the safety risks caused by falling ice.

[0032] 2. The rotation of the blades generates a certain centrifugal force, which makes the sliding part move down faster, and when the sliding part moves back, it also drives the ice crushing assembly to move back, so that the ice crushing assembly can crush the ice again, so that the ice that has not been cleaned up continues to be crushed, thereby further improving the removal effect and efficiency of the ice on the blades, greatly saving energy, and reducing the safety risks caused by falling ice.

[0033] 3. The sliding piece moves to the pushing mechanism, the electromagnetic ring is powered off and the pushing mechanism is started to push the sliding piece downward under the action of elastic force, so that the sliding piece is accelerated to move downward under the dual action of gravity and thrust of the gravity component, thereby greatly improving the efficiency of ice removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the anti-icing device; Figure 2 It is a schematic diagram of the local structure of the anti-icing device; Figure 3 It is a structural schematic diagram of the adsorption component and the driving mechanism in the anti-icing device.

[0035] Figure numerals: 1, body; 11, rotating shaft; 12, blade; 2, de-icing mechanism; 21, sliding member; 22, ball; 23, adsorption surface; 3, limit assembly; 31, limit ring; 32, limit member; 33, arc surface; 34, rotating groove; 4, counterweight assembly; 41, counterweight block one; 42, counterweight block two; 5, ice crushing assembly; 51, long ice crushing plate; 52, short ice crushing plate; 6, adsorption assembly; 61, electromagnetic ring; 62, tension spring; 7, pushing mechanism; 71, pushing ring; 72, pushing spring; 8, positioning assembly; 81, pressure plate; 82, telescopic member; 83, push plate; 85, passage hole. DETAILED DESCRIPTION

[0036] The present application is described in further detail below.

[0037] The embodiments of the present application disclose a wind turbine blade anti-icing device and an anti-icing method.

[0038] Reference Figure 1 and Figure 2 The wind turbine blade anti-icing device includes a deicing mechanism 2 arranged on a body 1, a rotating shaft 11 is rotatably mounted on the body 1, and a plurality of blades 12 are fixedly mounted on the rotating shaft 11. The deicing mechanism 2 is used to crush and remove ice on the blades 12.

[0039] The de-icing mechanism 2 includes a plurality of sliding members 21, a limit assembly 3, an ice crushing assembly 5 and a counterweight assembly 4. The plurality of sliding members 21 are arranged in one-to-one correspondence with the plurality of blades 12. The sliding members 21 are interlocked with two sliding plates and then fixed by screws, so that the sliding members 21 can be removed from the blades 12 for replacement; a plurality of balls 22 are evenly rotated on the inner wall of the sliding member 21, and the plurality of balls 22 are pressed against the opposite surfaces of the blades 12 for positioning. If the width of the blade 12 gradually changes, the inner width of the sliding member 21 is greater than the maximum width of the blade 12, so as to facilitate the sliding member 21 to move to the end of the blade 12 away from the rotating shaft 11.

[0040] The limit assembly 3 is arranged on the body 1 and connected to the sliding member 21, and the limit assembly 3 is used to limit the multiple sliding members 21. The limit assembly 3 includes a limit ring 31 and multiple limit members 32. The limit ring 31 is fixedly installed on the outer wall of the body 1 and is located above the axis of the rotating shaft 11. The side wall of the limit ring 31 facing away from the rotating shaft 11 is an arc surface 33, and the center of the arc surface 33 is located on the axis of the rotating shaft 11; the multiple limit members 32 are arranged in a one-to-one correspondence with the multiple blades 12, the limit member 32 is fixedly installed on the end of the blade 12 away from the rotating shaft 11, and the limit member 32 is used to prevent the sliding member 21 from falling from the blade 12.

[0041] The counterweight assembly 4 is arranged on the sliding member 21 and is used to counterweight the sliding member 21, which increases the gravity of the sliding member 21 and makes the sliding member 21 easier to move under the action of gravity, thereby ensuring that the sliding member 21 moves under the action of gravity; the ice crushing assembly 5 is arranged on the sliding member 21, and the movement of the sliding member 21 drives the ice crushing assembly 5 to move and break the ice on the blade 12, thereby greatly reducing the size of the ice when it falls.

[0042] The counterweight assembly 4 includes a counterweight block 41 and a counterweight block 42, and the counterweight block 41 and the counterweight block 42 are respectively fixedly mounted on the opposite side walls of the sliding member 21, that is, the counterweight block 41 and the counterweight block 42 are respectively fixedly mounted on the opposite side walls of the two sliding plates constituting the sliding member 21, thereby increasing the gravity of the sliding member 21. The density of the material of the counterweight block 41 and the counterweight block 42 is greater than the density of the material of the sliding member 21. Under the condition of the same volume, the weight of the counterweight block 41 and the counterweight block 42 is greater.

[0043] Reference Figure 1 and Figure 2 The ice crushing assembly 5 includes a plurality of long ice crushing plates 51 and a plurality of short ice crushing plates 52. The plurality of long ice crushing plates 51 and the plurality of short ice crushing plates 52 are arranged at intervals on one end of the sliding member 21 close to the limiting member 32 and are located on both sides of the blade 12. The long ice crushing plates 51 are longer than the short ice crushing plates 52, and each short ice crushing plate 52 is located between two adjacent long ice crushing plates 51. The number of the long ice crushing plates 51 and the short ice crushing plates 52 located on the same side of the blade 12 is the same, and a plurality of tips for crushing ice are provided at one end close to the limiting member 32. The long ice crushing plates 51 and the plurality of short ice crushing plates 52 are closely attached to the two surfaces of the blade 12 with larger areas, so as to remove ice from the blade 12.

[0044] The rotation of the blade 12 drives the sliding member 21 to rotate at the same time. When the blade 12 rotates to below the axis of the rotating shaft 11, the sliding member 21 moves downward away from the rotating shaft 11 under the action of its own gravity, the counterweight block 1 41 and the counterweight block 2 42. The sliding member 21 drives the long ice-breaking plate 51 and the short ice-breaking plate 52 to move downward to break and remove the ice on the surface of the blade 12 until the bottom end of the sliding member 21 abuts against the limit member 32 for positioning, and the limit member 32 prevents the sliding member 21 from detaching from the blade 12.

[0045] The rotation of the blade 12 drives the sliding member 21 to continue to rotate. When the blade 12 rotates above the axis of the rotating shaft 11, the sliding member 21 moves downward close to the rotating shaft 11 under the action of gravity, that is, the sliding member 21 drives the long ice-breaking plate 51 and the short ice-breaking plate 52 to move back at the same time to continue to break and remove the ice on the blade 12 until the sliding member 21 is positioned against the arc surface 33, so that the ice on the blade 12 can be removed in real time without using electric energy for heating. In addition, the ice can be broken, thereby greatly reducing the size of the ice when it falls, thereby improving the removal effect and efficiency of the ice on the blade 12, reducing energy consumption and safety risks caused by falling ice.

[0046] Reference Figure 1 and Figure 3 An adsorption component 6 is provided on the limit ring 31, and a pushing mechanism 7 is provided on the body 1. The limit component 3 includes an electromagnetic ring 61 and a tension spring 62. An arc-shaped rotating groove 34 is opened on the arc surface 33 around the axis of the rotating shaft 11. The electromagnetic ring 61 is rotatably installed on the rotating groove 34. The electromagnetic ring 61 is arc-shaped and the center of the circle is located on the axis of the rotating shaft 11.

[0047] Reference Figure 2 and Figure 3 The sliding member 21 is provided with an arc-shaped adsorption surface 23. When the sliding member 21 moves down and approaches the rotating shaft 11, the adsorption surface 23 is closely attached to the arc-shaped surface 33 for positioning. The blade 12 rotates to drive the sliding member 21 to rotate, so that the adsorption surface 23 on the sliding member 21 rotates and abuts against the electromagnetic ring 61. The electromagnetic ring 61 is arc-shaped and closely attached to the adsorption surface 23. The electromagnetic ring 61 is energized and adsorbed on the sliding member 21, so that the sliding member 21 drives the electromagnetic ring 61 to rotate; one end of the tension spring 62 is fixedly installed on the rotating groove 34 and the other end is fixed to the electromagnetic ring 61. When the electromagnetic ring 61 rotates, the tension spring 62 is stretched, and the tension spring 62 keeps the electromagnetic ring 61 from rotating to its original position.

[0048] When the sliding member 21 drives the electromagnetic ring 61 to rotate and causes the sliding member 21 to rotate below the axis of the rotating shaft 11, the pushing mechanism 7 is aligned with the sliding member 21, and the pushing mechanism 7 is started and pushes the sliding member 21 downward under the action of elastic force. At the same time, the electromagnetic ring 61 is powered off, so that the sliding member 21 moves downward under the dual action of gravity and thrust, thereby greatly increasing the force and speed of ice crushing, and further improving the efficiency and effect of removing ice on the blades 12.

[0049] Reference Figure 1 and Figure 3 The pushing mechanism 7 includes a pushing ring 71, a pushing spring 72 and a positioning assembly 8. The pushing ring 71 is slidably arranged on the side wall of the body 1 in a direction close to or away from the sliding member 21. The sliding direction of the pushing ring 71 is radially along the rotating shaft 11. The pushing spring 72 is fixedly installed on the body 1 and connected to the pushing ring 71; the positioning assembly 8 is used to position the pushing ring 71. When the sliding member 21 rotates to the bottom of the rotating shaft 11, the positioning assembly 8 is unlocked and the pushing ring 71 pushes the sliding member 21 downward under the elastic force of the pushing spring 72. The positioning assembly 8 can also drive the pushing ring 71 to squeeze the pushing spring 72 back to its original position.

[0050] The positioning assembly 8 includes a pressure plate 81, a telescopic member 82 and a push plate 83. The pressure plate 81 is fixedly mounted on one end of the electromagnetic ring 61 close to the pushing ring 71, and the pressure plate 81 is pressed against the pushing ring 71 for positioning. A through hole 85 is provided at the connection between the pressure plate 81 and the electromagnetic ring 61. The sliding member 21 rotates to drive the electromagnetic ring 61 and the pressure plate 81 to rotate. When the sliding member 21 rotates below the axis of the rotating shaft 11, the through hole 85 is aligned with the pushing ring 71, so that the pushing ring 71 can quickly push the sliding member 21 downward through the through hole 85 under the action of the pushing spring 72, and the pushing ring 71 is slidably installed on the through hole 85. At the same time, the electromagnetic ring 61 is powered off to release the adsorption force on the sliding member 21, and the pushing ring 71 is slidably installed on the through hole 85 to prevent the electromagnetic ring 61 and the pressure plate 81 from moving back.

[0051] The telescopic member 82 is fixedly mounted on the side wall of the body 1 and is located outside the pressure plate 81 and the electromagnetic ring 61. The piston rod of the telescopic member 82 is arranged along the moving direction of the push ring 71. The push plate 83 is fixedly mounted on the piston rod of the telescopic member 82 and presses against the push ring 71 for positioning. The telescopic member 82 is started to drive the push plate 83 to abut against the push ring 71. The push plate 83 moves and drives the push ring 71 to move back to its original position. After the push ring 71 moves back, it detaches from the passage hole 85. The pressure plate 81 and the electromagnetic ring 61 move back under the action of the tension spring 62. After the pressure plate 81 moves back, it also presses against the push ring 71 for positioning.

[0052] Before the electromagnetic ring 61 drives the pressure plate 81 to rotate and aligns the through hole 85 with the pushing ring 71, the telescopic member 82 first drives the push plate 83 away from the pushing ring 71, so that when the through hole 85 is aligned with the pushing ring 71, the pushing ring 71 can move quickly under the action of the pushing spring 72 and push the sliding member 21 downward.

[0053] The working principle of the embodiment of the present application is as follows: The blade 12 rotates and drives the sliding member 21 to rotate at the same time. Under the action of gravity, the sliding member 21 abuts against the arc surface 33 for positioning. Then the sliding member 21 rotates to the electromagnetic ring 61. The electromagnetic ring 61 is energized and adsorbed on the sliding member 21. The sliding member 21 rotates and drives the electromagnetic ring 61 and the pressure plate 81 to rotate at the same time and stretch the tension spring 62. When the sliding member 21 rotates to be flush with the axis of the rotating shaft 11, the telescopic member 82 drives the push plate 83 away from the push ring 71, and the pressure plate 81 positions the push ring 71. Then the sliding member 21 rotates below the axis of the rotating shaft 11, so that the push ring 71 is aligned with the through hole 85. The push ring 71 pushes the sliding member 21 downward under the action of the push spring 72. At the same time, the electromagnetic ring 61 is powered off, so that the sliding member 21 moves downward under the dual action of thrust and gravity.

[0054] The sliding member 21 moves downward to drive the long ice-crushing plates 51 and the short ice-crushing plates 52 to move downward, thereby breaking the ice on the surface of the blade 12, until the sliding member 21 abuts against the limit member 32 for positioning, and at the same time, the telescopic member 82 starts to drive the push ring 71 to move back to its original position, and the pressure plate 81 and the electromagnetic ring 61 move back under the action of the tension spring 62, and the pressure plate 81 presses on the push ring 71 for positioning.

[0055] The blade 12 continues to drive the sliding member 21 to rotate. When the blade 12 and the sliding member 21 rotate above the axis of the rotating shaft 11, the sliding member 21 drives the long ice-crushing plate 51 and the short ice-crushing plate 52 to move back at the same time under the action of gravity to continue to remove the ice on the blade 12 until the sliding member 21 is positioned against the arc surface 33, so that the ice on the blade 12 can be removed in real time without using electric energy for heating, and the ice can be broken, thereby greatly reducing the size of the ice when it falls, thereby improving the removal effect and efficiency of the ice on the blade 12, reducing energy consumption and safety risks caused by falling ice.

[0056] The embodiment of the present application discloses a method for preventing icing on blades of a wind turbine generator set.

[0057] Reference Figure 1-3 The wind turbine blade anti-icing method comprises the following steps: The blade 12 rotates to drive the sliding member 21 to rotate simultaneously; The sliding member 21 rotates to below the axis of the rotating shaft 11, and the pushing mechanism 7 pushes the sliding member 21 downward, so that the sliding member 21 moves downward under the dual action of the thrust and the gravity of the counterweight assembly 4, and the ice crushing assembly 5 moves downward to remove the ice until it abuts against the limit member 32 for positioning; The sliding member 21 rotates to above the axis of the rotating shaft 11, and moves back under the action of gravity, and the ice crushing assembly 5 moves back to continue to remove the ice on the blades 12 until it abuts against the limiting ring 31 for positioning, and then repeats the process to continuously remove the ice on the blades 12.

[0058] The working principle of the embodiment of the present application is as follows: The rotation of the blade 12 drives the sliding member 21 to rotate at the same time; the sliding member 21 rotates to below the axis of the rotating shaft 11, and the pushing mechanism 7 pushes the sliding member 21 downward, so that the sliding member 21 moves downward under the action of the thrust and the gravity of the counterweight assembly 4, and the ice crushing assembly 5 moves downward to remove the ice until it abuts against the limit ring 32 for positioning; the sliding member 21 rotates to above the axis of the rotating shaft 11, and the sliding member 21 moves back under the action of gravity, and the ice crushing assembly 5 moves back to continue to remove the ice on the blade 12 until it abuts against the limit ring 31 for positioning, and then the process is repeated to continuously remove the ice on the blade 12.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wind turbine blade anti-icing device, characterized in that: The invention comprises a deicing mechanism (2), wherein the deicing mechanism (2) is used to remove ice on blades (12) arranged on a machine body (1) by rotating a rotating shaft (11), and the deicing mechanism (2) comprises: A plurality of sliding members (21) are respectively and slidably sleeved on the plurality of blades (12); A limiting assembly (3), arranged on the machine body (1) and connected to the sliding member (21) and used to limit the position of the plurality of sliding members (21); A counterweight assembly (4) is disposed on the sliding member (21) and pushes the sliding member (21) to move under the action of gravity; The ice crushing assembly (5) is arranged on the sliding member (21) and moves downward under the action of the counterweight assembly (4) to crush the ice covering the blades (12).

2. The wind turbine blade anti-icing device according to claim 1, characterized in that: The limiting component (3) comprises: The limiting ring (31) and the limiting member (32) are respectively arranged on the machine body (1) and on one end of the blade (12) away from the machine body (1), and the sliding member (21) abuts against the limiting ring (31) or the limiting member (32) for positioning.

3. The wind turbine blade anti-icing device according to claim 2, characterized in that: The limiting ring (31) is provided with an adsorption component (6), the machine body (1) is provided with a pushing mechanism (7), and the adsorption component (6) comprises: An electromagnetic ring (61) is mounted on the limit ring (31) so as to rotate around the axis of the rotating shaft (11); A tension spring (62) is arranged on the limit ring (31) and connected to the electromagnetic ring (61); when the sliding member (21) rotates to above the axis of the rotating shaft (11), it moves downward under the action of gravity and abuts against the limit ring (31) for positioning; after the sliding member (21) rotates, it abuts against the electromagnetic ring (61); after the electromagnetic ring (61) is energized, it is adsorbed on the sliding member (21) and rotates under the action of the sliding member (21) to stretch the tension spring (62); when the sliding member (21) rotates to below the axis of the rotating shaft (11), the sliding member (21) moves to the pushing mechanism (7), the pushing mechanism (7) starts to push the sliding member (21) downward, and the electromagnetic ring (61) is powered off, so that the sliding member (21) moves downward under the action of gravity and thrust.

4. The wind turbine blade anti-icing device according to claim 3, characterized in that: The pushing mechanism (7) comprises: A pushing ring (71) is slidably disposed on the machine body (1) in a direction approaching or moving away from the sliding member (21); A push spring (72) is arranged on the machine body (1) and the push ring (71); The positioning assembly (8) is used to position the push ring (71); when the sliding member (21) rotates to below the rotating shaft (11), the positioning assembly (8) is unlocked and enables the push ring (71) to push the sliding member (21) downward under the action of the push spring (72) and can drive the push ring (71) to squeeze the push spring (72) and move back to the original position.

5. The wind turbine blade anti-icing device according to claim 4, characterized in that: The positioning component (8) comprises: A pressure plate (81) is arranged on the electromagnetic ring (61) and is pressed against the push ring (71) for positioning; a through hole (85) for the push ring (71) to pass through is provided at the connection between the pressure plate (81) and the electromagnetic ring (61); when the push ring (71) pushes the sliding member (21) to move downward, it is slidably mounted on the through hole (85) and can prevent the pressure plate (81) from moving back; A telescopic member (82) is arranged on the machine body (1); The push plate (83) is arranged on the piston rod of the telescopic member (82) and is pressed against the push ring (71) and is used to drive the push ring (71) to move.

6. The wind turbine blade anti-icing device according to claim 1, characterized in that: The counterweight assembly (4) comprises: The first counterweight block (41) and the second counterweight block (42) are arranged on two opposite outer side walls of the sliding member (21) and are used to balance the sliding member (21).

7. The wind turbine blade anti-icing device according to claim 1, characterized in that: The ice crushing component (5) comprises: A plurality of long ice crushing plates (51) and a plurality of short ice crushing plates (52) are arranged on the sliding member (21) at intervals and have different lengths; the short ice crushing plate (52) is located between two adjacent long ice crushing plates (51) and is used to crush ice.

8. The wind turbine blade anti-icing device according to claim 1, characterized in that: A plurality of balls (22) rolling on the blades (12) are arranged at intervals on the inner side wall of the sliding member (21).

9. The wind turbine blade anti-icing device according to claim 1, characterized in that: The sliding member (21) is formed by two sliding plates being buckled together and then fixed by screws.

10. An anti-icing method using the anti-icing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The blade (12) rotates to drive the sliding member (21) to rotate simultaneously; The sliding member (21) rotates to below the axis of the rotating shaft (11), and the pushing mechanism (7) pushes the sliding member (21) downward, so that the sliding member (21) moves downward under the action of the thrust and the gravity of the counterweight assembly (4), and the ice crushing assembly (5) moves downward to remove the covered ice until it abuts against the limiting member (32) for positioning; The sliding member (21) rotates to above the axis of the rotating shaft (11), and the sliding member (21) moves back under the action of gravity, and the ice crushing assembly (5) moves back to continue to remove the ice covering the blades (12) until it abuts against the limiting ring (31) for positioning, and then the process of continuously removing the ice covering the blades (12) is repeated.

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