A wind turbine blade anti-icing device and anti-icing method

Abstract

The application relates to an anti-icing device and method for wind turbine blades, and relates to the technical field of wind turbine blades. The anti-icing device comprises a deicing mechanism, which comprises: a plurality of sliding pieces, the sliding pieces being sleeved on a plurality of blades; a limiting assembly for limiting the plurality of sliding pieces; a counterweight assembly for driving the sliding pieces to move under the action of gravity; and an ice crushing assembly for crushing the ice on the blades under the action of the counterweight assembly. The application realizes the removal of the ice on the blades through cooperation of the sliding pieces, the ice crushing assembly, the counterweight assembly and the limiting assembly, improves the removal effect and efficiency of the ice on the blades, does not need other energy sources for driving, greatly saves energy, and the ice crushing assembly timely crushes the ice on the blades, the ice on the blades has not formed a whole, the difficulty in crushing and the size of the ice blocks after crushing are greatly reduced, and the safety risk caused by the falling of the ice blocks is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine blades, in particular to a wind turbine blade anti-icing device and anti-icing method. BACKGROUND

[0002] Most wind turbines are installed in some plateau areas, and the blade is one of the key components of the wind turbine. When the external environment temperature of the plateau area is low, freezing weather often occurs, especially under the weather conditions of rain or snow in winter, the ice accumulation on the surface of the wind turbine blade and the freezing inside the blade result in the change of the aerodynamic performance of the wind turbine blade, affecting the normal operation of the power system, so the ice on the blade of the wind turbine needs to be cleaned.

[0003] The general cleaning method is to heat the air in the blade cavity by a heater, and then blow the hot air in the blade cavity under the action of a blower to circulate the heat to the blade surface, so that the ice on the blade surface gradually melts and falls off. This relies on heating to remove ice, and the ice removal method is slow and consumes a large amount of energy. At the same time, this heating does not melt the ice into liquid and then leave it on the blade surface, but melts the ice layer at the contact position with the blade, so that it loses the adsorption force with the blade surface, resulting in the whole ice block maintaining the original shape and falling off. Since the ice block is large in volume, there is a certain safety risk. SUMMARY

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

[0005] In a first aspect, the present application provides a wind turbine blade anti-icing device, which adopts the following technical scheme:

[0006] A wind turbine blade anti-icing device, comprising an ice removal mechanism, the ice removal mechanism is used for removing the ice on the blade arranged on the body through the rotating shaft, and the ice removal mechanism comprises:

[0007] A plurality of sliding members are respectively slidably sleeved on a plurality of blades;

[0008] A limiting assembly is arranged on the body and connected with the sliding members and used for limiting the plurality of sliding members;

[0009] A counterweight assembly is arranged on the sliding member and pushes the sliding member to move under the action of gravity;

[0010] An ice crushing assembly is arranged on the sliding member and moves downward under the action of the counterweight assembly to crush the ice on the blade.

[0011] By adopting the technical scheme, the rotating shaft drives the blade and the sliding piece to rotate simultaneously, when the blade and the sliding piece rotate to below the rotating shaft axis, the sliding piece is initially positioned on the top of the blade, the sliding piece moves away from the rotating shaft under the action of the counterweight assembly, the sliding piece moves downward under the action of the counterweight assembly, the sliding piece drives the ice crushing assembly to move downward to crush and remove the ice on the blade, until the sliding piece moves to the bottom of the blade, i.e. the end of the blade away from the rotating shaft, and the sliding piece is limited by abutting against the limiting assembly.

[0012] Then, with the rotation of the blade, the blade and the sliding piece rotate to above the rotating shaft axis, the sliding piece moves close to the rotating shaft under the action of the counterweight assembly, and the sliding piece 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 blade, until the sliding piece is limited by abutting against the limiting assembly, and then the crushing and deicing is repeated.

[0013] The ice on the blade can be removed by cooperation of the sliding piece, the ice crushing assembly, the counterweight assembly and the limiting assembly, and compared with the prior art, the ice on the surfaces of the blade, even on all surfaces, can be removed, the ice removal effect is improved, and the ice removal efficiency on the blade is improved; the ice on the blade can be removed by the rotation of the blade, so that the ice on the blade can be removed in time, the risk that the ice on the blade is difficult to remove after being agglomerated into a whole is reduced, the ice removal effect and efficiency on the blade are improved, no other energy is needed for driving, energy is greatly saved, the ice on the blade is crushed in time by the ice crushing assembly, the ice on the blade has not been agglomerated into a whole, the difficulty in crushing and the size of the ice after being crushed are greatly reduced, and the safety risk caused by the falling of the ice is reduced.

[0014] Although the wind turbine blade has a low rotating speed, the rotation of the blade can also form a certain centrifugal force, so that when the sliding piece rotates to below the rotating shaft, the centrifugal force makes the sliding piece move downward at a faster speed, and when the sliding piece moves back to close to the rotating shaft, the ice has been removed, so that the sliding piece can quickly move back under the action of the counterweight assembly, and when the sliding piece moves back, the ice crushing assembly is also driven to move back, so that the ice crushing assembly can crush the ice again, the ice that has not been cleaned is continuously crushed, the ice removal effect and efficiency on the blade are further improved, energy is greatly saved, and the safety risk caused by the falling of the ice is reduced.

[0015] Optionally, the limiting assembly comprises:

[0016] The limiting ring and the limiting piece are respectively arranged on the body and the end of the blade away from the body, and the sliding piece is positioned by abutting against the limiting ring or the limiting piece.

[0017] By adopting the technical scheme, the sliding ring is positioned by abutting against the limiting ring after moving downwards and approaching the rotating shaft, and the sliding member is positioned by abutting against the limiting member after moving downwards and moving away from the rotating shaft, so as to ensure that the ice on the blade is broken by the moving driving ice breaking assembly, improve the removal efficiency of the ice on the blade, and greatly reduce the difficulty of breaking and the size of the broken ice, and reduce the safety risk caused by the falling ice.

[0018] Optionally, the limiting ring is provided with an adsorption assembly, and the machine body is provided with a pushing mechanism.

[0019] The electromagnetic ring is rotatably installed on the limiting ring around the rotating shaft axis.

[0020] The tension spring is arranged on the limiting ring and connected with the electromagnetic ring; when the sliding member rotates above the rotating shaft axis and moves downwards to abut against the limiting ring for positioning under the action of gravity, the sliding member rotates to abut against the electromagnetic ring, the electromagnetic ring is adsorbed on the sliding member and rotates and stretches the tension spring under the action of the sliding member after being electrified; when the sliding member rotates below the rotating shaft axis, the sliding member moves to the pushing mechanism, and the pushing mechanism starts to push the sliding member downwards and the electromagnetic ring is de-energized, so that the sliding member moves downwards under the action of gravity and the pushing force.

[0021] By adopting the technical scheme, the sliding member is positioned by abutting against the limiting ring after moving downwards and approaching the rotating shaft, then the blade rotates to drive the sliding member to rotate, so that the sliding member rotates to the electromagnetic ring and abuts against the electromagnetic ring, the electromagnetic ring is adsorbed on the sliding member for positioning after being electrified, the blade rotates to drive the sliding member to rotate, the sliding member drives the electromagnetic ring to rotate to stretch the tension spring, when the sliding member rotates below the rotating shaft axis, the sliding member rotates to the pushing mechanism, the electromagnetic ring is de-energized and the pushing mechanism starts to push the sliding member downwards under the action of the elastic force, so that the sliding member moves downwards under the action of the gravity of the gravity assembly and the pushing force, thereby greatly improving the removal efficiency of the ice.

[0022] Meanwhile, when the sliding member and the electromagnetic ring are separated, the electromagnetic ring moves back under the action of the tension spring, and the movement back of the electromagnetic ring also pushes the sliding member to move downwards, and the electromagnetic ring positions the sliding member, reduces the risk that the sliding member moves downwards and moves away from the pushing mechanism under the action of gravity before being pushed by the pushing mechanism, so that the sliding member is closer to the pushing mechanism, thereby greatly improving the pushing force of the pushing mechanism on the sliding member, further improving the removal efficiency of the ice, and reducing the safety risk caused by the falling ice.

[0023] Optionally, the pushing mechanism comprises:

[0024] The pushing ring is arranged on the machine body and slides in the direction of approaching or moving away from the sliding member;

[0025] The pushing spring is arranged on the machine body and the pushing ring.

[0026] A positioning assembly is arranged to position the pushing ring, and when the sliding member is turned to below the rotating shaft, the positioning assembly is unlocked and enables the pushing ring to push the sliding member downward under the action of the pushing spring and drive the pushing ring to move back to the original position by pressing the pushing spring.

[0027] By adopting the technical scheme, the positioning assembly positions the pushing ring, and the pushing spring is in a compressed state. When the sliding member is turned to below the rotating shaft and the pushing ring, the positioning assembly is unlocked and the electromagnetic ring is powered off. The pushing ring quickly pushes the sliding member downward under the action of the pushing spring. In addition, the gravity generated by the counterweight assembly on the sliding member makes the sliding member move downward at a faster speed, thereby improving the removal efficiency of the ice cover and reducing the safety risk caused by the falling of the ice block.

[0028] Then the positioning assembly is started to drive the pushing ring to move back to the original position and then position it, thereby facilitating the subsequent movement of the sliding member.

[0029] Optionally, the positioning assembly comprises:

[0030] A pressing plate is arranged on the electromagnetic ring and positioned against the pushing ring. A passing hole is formed at the connection between the pressing plate and the electromagnetic ring for the passing of the pushing ring. The pushing ring is slidably installed on the passing hole when pushing the sliding member downward and can block the movement of the pressing plate back.

[0031] A telescopic member is arranged on the machine body.

[0032] A push plate is arranged on the telescopic member piston rod and positioned against the pushing ring and used to drive the movement of the pushing ring.

[0033] By adopting the technical scheme, the electromagnetic ring moves back to the original position under the action of the tension spring. The movement of the electromagnetic ring drives the movement of the pressing plate. The passing hole is misaligned with the pushing ring, i.e., the pressing plate is positioned against the pushing ring. At the same time, the telescopic member drives the push plate to be positioned against the pushing ring. The movement of the electromagnetic ring drives the movement of the pressing plate. Since the push plate positions the pushing ring, the pressure between the pressing plate and the pushing ring is greatly reduced, thereby reducing the resistance when the pressing plate, the electromagnetic ring, and the sliding member rotate. This makes it more convenient and stable for the sliding member to drive the electromagnetic ring and the pressing plate to rotate.

[0034] When the sliding member is turned to a horizontal state, the telescopic member drives the push plate to move away from the pushing ring to be unlocked. At this time, the pushing ring is still misaligned with the passing hole, i.e., the pressing plate is positioned against the pushing ring. Then the sliding member continues to rotate and is turned to below the rotating shaft axis and the pushing ring. At this time, the passing hole is aligned with the pushing ring. The pushing ring is slidably installed on the passing hole under the action of the elastic force of the pushing spring, so that the pushing ring can quickly push the sliding member out under the action of the pushing spring.

[0035] The pushing ring is installed in the passing hole to position the pressing plate and the electromagnetic ring, then the telescopic part drives the pushing plate to push the pushing ring to move back to the original position, so that the pushing ring is moved out of the passing hole, the pressing plate and the electromagnetic ring can move back to the original position under the action of the tension spring, the pressing plate is also positioned against the pushing ring, and then the operation is repeated, so that the next sliding part is pushed downward, the convenience in the pushing process and the pushing force on the sliding part are greatly improved, the ice removal efficiency is improved, and the safety risk caused by the falling of ice blocks is reduced.

[0036] Optionally, the counterweight assembly comprises:

[0037] The counterweight block one and the counterweight block two are arranged on the opposite two outer side walls of the sliding part and are used for counterweighting the sliding part.

[0038] By adopting the above technical scheme, the counterweight block one and the counterweight block two cooperate to counterweight the sliding part, and the counterweight block one and the counterweight block two are located on the opposite two side walls of the sliding part, so that the downward gravity received by the sliding part is more uniform, the risk of the sliding part being stuck due to uneven force when moving downward is reduced, the ice removal efficiency is improved, and the safety risk caused by the falling of ice blocks is reduced.

[0039] Optionally, the ice crushing assembly comprises:

[0040] A plurality of long ice crushing plates and a plurality of short ice crushing plates are arranged on the sliding part in a spaced manner and have different lengths, and the short ice crushing plates are located between adjacent two long ice crushing plates and cooperate to crush the ice.

[0041] By adopting the above technical scheme, the plurality of long ice crushing plates and the plurality of short ice crushing plates cooperate to achieve the function of crushing the ice, and the structure of different lengths can greatly reduce the resistance received by the concentrated crushing of the ice, so that the ice can be more easily crushed, the ice removal efficiency is improved, and the safety risk caused by the falling of ice blocks is reduced.

[0042] Optionally, a plurality of rolling balls are arranged on the inner side wall of the sliding part in a spaced manner and roll on the blades.

[0043] By adopting the above technical scheme, the rolling balls greatly reduce the resistance generated to the sliding part, and in addition, the blades have an irregular shape, the design of the rolling balls enables the inside of the sliding part to better adapt to the shape of the blades, further reducing the resistance generated during movement, improving the ice removal efficiency, and reducing the safety risk caused by the falling of ice blocks. At the same time, the rolling balls roll on the blades, and the rolling balls can also crush the ice in contact therewith, further improving the ice removal efficiency and reducing the safety risk caused by the falling of ice blocks.

[0044] Optionally, the sliding part is formed by two sliding plates being mutually buckled and then being fixed by screws.

[0045] By adopting the technical scheme, the sliding member is a consumable part, so it is more convenient to replace.

[0046] In a second aspect, the application provides a wind turbine blade anti-icing method, which adopts the following technical scheme:

[0047] A wind turbine blade anti-icing method comprises the following steps:

[0048] The blade rotates to drive the sliding member to rotate simultaneously;

[0049] The sliding member moves below the axis of the rotating shaft, the pushing mechanism pushes the sliding member downward, so that the sliding member moves downward under the action of the pushing force and the gravity of the counterweight assembly, the ice crushing assembly moves downward to remove the ice, and stops positioning against the limiting member;

[0050] The sliding member moves above the axis of the rotating shaft, the sliding member moves back under the action of gravity, the ice crushing assembly moves back to continue removing the ice on the blade, and stops positioning against the limiting ring, and then the process of removing the ice on the blade is repeated continuously

[0051] By adopting the technical scheme, the blade rotates to drive the sliding member to rotate simultaneously; the sliding member moves below the axis of the rotating shaft, the pushing mechanism pushes the sliding member downward, so that the sliding member moves downward under the action of the pushing force and the gravity of the counterweight assembly, the ice crushing assembly moves downward to remove the ice, and stops positioning against the limiting member; the sliding member moves above the axis of the rotating shaft, the sliding member moves back under the action of gravity, the ice crushing assembly moves back to continue removing the ice on the blade, and stops positioning against the limiting ring, and then the process of removing the ice on the blade is repeated continuously, which improves the removal efficiency of the ice and reduces the safety risk caused by the falling of the ice.

[0052] In summary, the application has at least one of the following beneficial technical effects:

[0053] 1. The ice on the blade is removed by the cooperation of the sliding member, the ice crushing assembly, the counterweight assembly and the limiting assembly, which improves the removal effect and efficiency of the ice on the blade, does not need other energy to drive, greatly saves energy, and the ice on the blade is broken by the ice crushing assembly in time, so the ice on the blade is not formed as a whole, the difficulty of breaking and the size of the broken ice are greatly reduced, and the safety risk caused by the falling of the ice is reduced.

[0054] 2. The blade rotation forms a certain centrifugal force, so that the sliding member moves downward faster, and when the sliding member moves back, the ice crushing assembly also moves back, so that the ice crushing assembly can break the ice again, so that the ice that has not been cleaned completely is broken again, thereby further improving the removal effect and efficiency of the ice on the blade, greatly saving energy, and reducing the safety risk caused by the falling of the ice.

[0055] 3. The sliding piece is moved to the pushing mechanism by sliding, the electromagnetic ring is powered off, and the pushing mechanism is started to push the sliding piece downward under the action of the elastic force, so that the sliding piece moves downward under the action of the gravity of the gravity assembly and the pushing force, thereby greatly improving the ice removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a schematic diagram of the three-dimensional structure of the anti-icing device;

[0057] Figure 2 is a schematic diagram of the partial structure of the anti-icing device;

[0058] Figure 3 is a schematic diagram of the structure of the adsorption assembly and the pushing mechanism in the anti-icing device.

[0059] Reference signs: 1, body; 11, rotating shaft; 12, blade; 2, deicing mechanism; 21, sliding piece; 22, ball; 23, adsorption surface; 3, limiting assembly; 31, limiting ring; 32, limiting piece; 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, pressing plate; 82, telescopic piece; 83, push plate; 85, through hole. DETAILED DESCRIPTION

[0060] The application will be further described in detail below.

[0061] The embodiment of the application discloses a wind turbine blade anti-icing device and an anti-icing method.

[0062] Reference Figure 1 and Figure 2 The wind turbine blade anti-icing device comprises a deicing mechanism 2 arranged on a body 1, a rotating shaft 11 rotatably arranged on the body 1, and a plurality of blades 12 fixedly arranged on the rotating shaft 11, and the deicing mechanism 2 is used for crushing and removing ice on the blades 12.

[0063] The deicing mechanism 2 comprises a plurality of sliding pieces 21, a limiting assembly 3, an ice crushing assembly 5 and a counterweight assembly 4, the plurality of sliding pieces 21 are arranged one by one with the plurality of blades 12, the sliding pieces 21 are arranged by two sliding plates, and then fixed by screws, so that the sliding pieces 21 can be removed from the blades 12 for replacement; a plurality of rolling balls 22 are arranged on the inner side wall of the sliding piece 21, and the plurality of rolling balls 22 are positioned on the opposite surfaces of the blade 12, if the width of the blade 12 gradually changes, the width of the sliding piece 21 is greater than the maximum width of the blade 12, so that the sliding piece 21 can be moved to the end of the blade 12 away from the rotating shaft 11.

[0064] The limiting assembly 3 is arranged on the machine body 1 and connected with the sliding piece 21, and the limiting assembly 3 is used for limiting the plurality of sliding pieces 21, the limiting assembly 3 comprises a limiting ring 31 and a plurality of limiting pieces 32, the limiting ring 31 is fixedly installed on the outer side wall of the machine body 1 and located above the axis of the rotating shaft 11, the side wall of the limiting ring 31 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 plurality of limiting pieces 32 are arranged one by one with the plurality of blades 12, the limiting piece 32 is fixedly installed on the end of the blade 12 away from the rotating shaft 11, and the limiting piece 32 is used for blocking the sliding piece 21 from falling off the blade 12.

[0065] The counterweight assembly 4 is arranged on the sliding piece 21 and used for counterweighting the sliding piece 21, which increases the gravity of the sliding piece 21 and makes the sliding piece 21 more easily move under the action of gravity, so as to ensure that the sliding piece 21 moves under the action of gravity; the ice crushing assembly 5 is arranged on the sliding piece 21, and the sliding piece 21 drives the ice crushing assembly 5 to move to crush the ice on the blade 12, so as to greatly reduce the size of the falling ice.

[0066] The counterweight assembly 4 comprises a counterweight block one 41 and a counterweight block two 42, the counterweight block one 41 and the counterweight block two 42 are respectively fixedly installed on the opposite side walls of the sliding piece 21, that is, the counterweight block one 41 and the counterweight block two 42 are respectively fixedly installed on the opposite side walls of the two sliding plates constituting the sliding piece 21, so as to increase the gravity of the sliding piece 21, the density of the material of the counterweight block one 41 and the counterweight block two 42 is greater than the density of the material of the sliding piece 21, and under the condition of the same volume, the weight of the counterweight block one 41 and the counterweight block two 42 is greater.

[0067] Referring to Figure 1 and Figure 2The ice crushing assembly 5 comprises 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 on the one end of the sliding piece 21 close to the limiting piece 32 and located on both sides of the blade 12, the long ice crushing plate 51 is longer than the short ice crushing plate 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 plate 51 and the short ice crushing plate 52 located on the same side of the blade 12 is the same, and a plurality of sharp ends for crushing ice are arranged on the one end close to the limiting piece 32, and the long ice crushing plate 51 and the plurality of short ice crushing plates 52 are closely arranged on the two surfaces of the blade 12 with large area, so as to remove the ice on the blade 12.

[0068] The blade 12 drives the sliding piece 21 to rotate, and when the blade 12 rotates below the axis line of the rotating shaft 11, the sliding piece 21 moves away from the rotating shaft 11 under the gravity of itself, the first counterweight 41 and the second counterweight 42, the sliding piece 21 drives the long ice crushing plate 51 and the short ice crushing plate 52 to move downward to crush and remove the ice on the surface of the blade 12, until the bottom end of the sliding piece 21 is positioned on the limiting piece 32, and the limiting piece 32 blocks the sliding piece 21 from separating from the blade 12.

[0069] The blade 12 drives the sliding piece 21 to continue to rotate, and when the blade 12 rotates above the axis line of the rotating shaft 11, the sliding piece 21 moves close to the rotating shaft 11 under the gravity, that is, the sliding piece 21 drives the long ice crushing plate 51 and the short ice crushing plate 52 to move back to continue to crush and remove the ice on the blade 12, until the sliding piece 21 is positioned on 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 is crushed, so that the size of the ice falling is greatly reduced, thereby improving the removal effect and efficiency of the ice on the blade 12, reducing the energy consumption and the safety risk caused by the falling of the ice.

[0070] Referring to Figure 1 and Figure 3 The limiting ring 31 is provided with a suction assembly 6, the machine body 1 is provided with a pushing mechanism 7, the limiting assembly 3 comprises an electromagnetic ring 61 and a tension spring 62, the arc surface 33 is provided with an arc-shaped rotating groove 34 around the axis line of the rotating shaft 11, the electromagnetic ring 61 is rotatably installed in the rotating groove 34, and the electromagnetic ring 61 is arc-shaped and the center of the arc is located on the axis line of the rotating shaft 11.

[0071] Referring to Figure 2 and Figure 3The arc-shaped adsorption surface 23 is arranged on the sliding piece 21, and when the sliding piece 21 moves downward to be close to the rotating shaft 11, the adsorption surface 23 is tightly attached to the arc-shaped surface 33 for positioning. The blade 12 drives the sliding piece 21 to rotate, so that the adsorption surface 23 on the sliding piece 21 rotates and abuts against the electromagnetic ring 61. The electromagnetic ring 61 is arc-shaped and tightly attached to the adsorption surface 23. The electromagnetic ring 61 is powered to be adsorbed on the sliding piece 21 and drives the sliding piece 21 to rotate. One end of the tension spring 62 is fixedly installed on the rotating groove 34, and the other end is fixed with the electromagnetic ring 61. When the electromagnetic ring 61 rotates, the tension spring 62 is pulled to be elongated, and the tension spring 62 keeps the electromagnetic ring 61 to be rotated to the original position.

[0072] When the sliding piece 21 drives the electromagnetic ring 61 to rotate and moves to the position below the axis of the rotating shaft 11, the pushing mechanism 7 is aligned with the sliding piece 21. The pushing mechanism 7 is started and pushes the sliding piece 21 downward under the action of the elastic force. At the same time, the electromagnetic ring 61 is powered off, so that the sliding piece 21 moves downward under the action of the gravity and the pushing force, thereby greatly increasing the force and speed when the ice is crushed, and further improving the removal efficiency and effect of the ice on the blade 12.

[0073] With reference to 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 arranged on the side wall of the machine body 1 and slides in the direction close to or away from the sliding piece 21. The sliding direction of the pushing ring 71 is along the radial direction of the rotating shaft 11. The pushing spring 72 is fixedly installed on the machine body 1 and connected with the pushing ring 71. The positioning assembly 8 is used for positioning the pushing ring 71. When the sliding piece 21 moves to the position below the rotating shaft 11, the positioning assembly 8 is unlocked and drives the pushing ring 71 to push the sliding piece 21 to move downward under the action of the elastic force of the pushing spring 72. The positioning assembly 8 can also drive the pushing ring 71 to press the pushing spring 72 to move back to the original position.

[0074] The positioning assembly 8 includes a pressing plate 81, an extension piece 82 and a pushing plate 83. The pressing plate 81 is fixedly installed on one end of the electromagnetic ring 61 close to the pushing ring 71 and is positioned by pressing the pushing ring 71. A passing hole 85 is formed at the connection between the pressing plate 81 and the electromagnetic ring 61. The sliding piece 21 drives the electromagnetic ring 61 and the pressing plate 81 to rotate. When the sliding piece 21 moves to the position below the axis of the rotating shaft 11, the passing hole 85 is aligned with the pushing ring 71, so that the pushing ring 71 quickly passes through the passing hole 85 to push the sliding piece 21 to move downward under the action of the pushing spring 72. The pushing ring 71 is slidably installed on the passing hole 85. At the same time, the electromagnetic ring 61 is powered off to release the adsorption force on the sliding piece 21. The pushing ring 71 slidably installed on the passing hole 85 can block the electromagnetic ring 61 and the pressing plate 81 from moving back.

[0075] The telescopic member 82 is fixedly installed on the side wall of the machine body 1 and located outside the pressing plate 81 and the electromagnetic ring 61, the piston rod of the telescopic member 82 is arranged along the moving direction of the pushing ring 71, the pushing plate 83 is fixedly installed on the piston rod of the telescopic member 82 and is positioned by pressing on the pushing ring 71, the telescopic member 82 drives the pushing plate 83 to press against the pushing ring 71, the pushing plate 83 drives the pushing ring 71 to move back to the original position, the pushing ring 71 is separated from the through hole 85 after moving back, the pressing plate 81 and the electromagnetic ring 61 move back under the action of the tension spring 62, and the pressing plate 81 is also positioned by pressing on the pushing ring 71 after moving back.

[0076] Before the electromagnetic ring 61 drives the pressing plate 81 to rotate to align the through hole 85 with the pushing ring 71, the telescopic member 82 first drives the pushing plate 83 to move away from the pushing ring 71, so that the pushing ring 71 can quickly move under the action of the pushing spring 72 to push the sliding member 21 to move down when the through hole 85 is aligned with the pushing ring 71.

[0077] The working principle of the embodiment of the application is as follows:

[0078] The blade 12 drives the sliding member 21 to rotate, the sliding member 21 is positioned by abutting against the arc surface 33 under the action of gravity, and then the sliding member 21 rotates to the electromagnetic ring 61, the electromagnetic ring 61 is adsorbed on the sliding member 21 after being electrified, the sliding member 21 drives the electromagnetic ring 61 and the pressing plate 81 to rotate and stretch the tension spring 62 at the same time, when the sliding member 21 rotates to be flush with the axis of the rotating shaft 11, the telescopic member 82 drives the pushing plate 83 to move away from the pushing ring 71, and the pressing plate 81 positions the pushing ring 71, then the sliding member 21 rotates to be below the axis of the rotating shaft 11, so that the pushing ring 71 is aligned with the through hole 85, the pushing ring 71 pushes the sliding member 21 to move down under the action of the pushing spring 72, and the electromagnetic ring 61 is de-energized, so that the sliding member 21 moves down under the double actions of the pushing force and the gravity.

[0079] The sliding member 21 drives the long ice crushing plate 51 and the short ice crushing plate 52 to move down to break the ice on the surface of the blade 12, until the sliding member 21 is positioned by abutting against the limiting member 32, at the same time, the telescopic member 82 drives the pushing ring 71 to move back to the original position, and the pressing plate 81 and the electromagnetic ring 61 move back under the action of the tension spring 62, and the pressing plate 81 is positioned by pressing on the pushing ring 71.

[0080] The blade 12 continues to drive the sliding piece 21 to rotate, when the blade 12 and the sliding piece 21 rotate to above the axis line of the rotating shaft 11, the sliding piece 21 drives the long ice crushing plate 51 and the short ice crushing plate 52 to move back under the action of gravity, and the ice on the blade 12 is continuously removed, until the sliding piece 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 is crushed, so that the size of the ice falling is greatly reduced, and therefore the removal effect and efficiency of the ice on the blade 12 are improved, and the energy consumption and the safety risk caused by the falling of the ice are reduced.

[0081] The application discloses a wind turbine blade anti-icing method.

[0082] Referring to Figures 1-3 The wind turbine blade anti-icing method comprises the following steps:

[0083] The blade 12 drives the sliding piece 21 to rotate simultaneously;

[0084] The sliding piece 21 rotates to below the axis line of the rotating shaft 11, the pushing mechanism 7 pushes the sliding piece 21 downwards, so that the sliding piece 21 moves downwards under the double actions of the pushing force and the gravity of the counterweight assembly 4, the ice crushing assembly 5 moves downwards for removing the ice, and the sliding piece 21 is positioned against the limiting piece 32.

[0085] The sliding piece 21 rotates to above the axis line of the rotating shaft 11, the sliding piece 21 moves back under the action of gravity, the ice crushing assembly 5 moves back to continuously remove the ice on the blade 12, and the sliding piece 21 is positioned against the limiting ring 31, and then the ice on the blade 12 is continuously removed through repetition.

[0086] The working principle of the application is as follows:

[0087] The blade 12 drives the sliding piece 21 to rotate simultaneously; the sliding piece 21 rotates to below the axis line of the rotating shaft 11, the pushing mechanism 7 pushes the sliding piece 21 downwards, so that the sliding piece 21 moves downwards under the double actions of the pushing force and the gravity of the counterweight assembly 4, the ice crushing assembly 5 moves downwards for removing the ice, and the sliding piece 21 is positioned against the limiting piece 32; the sliding piece 21 rotates to above the axis line of the rotating shaft 11, the sliding piece 21 moves back under the action of gravity, the ice crushing assembly 5 moves back to continuously remove the ice on the blade 12, and the sliding piece 21 is positioned against the limiting ring 31, and then the ice on the blade 12 is continuously removed through repetition.

[0088] The above are the preferred embodiments of the application, and the protection scope of the application is not limited by the above, and therefore: equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. An anti-icing device for a wind turbine blade, characterized in that: The deicing mechanism (2) is used for removing ice on the blades (12) rotatingly arranged on the body (1) through the rotating shaft (11), and the deicing mechanism (2) comprises: a plurality of sliding pieces (21) respectively slidingly sleeved on the plurality of blades (12); a limiting assembly (3) arranged on the body (1) and connected with the sliding pieces (21) and used for limiting the plurality of sliding pieces (21); a counterweight assembly (4) arranged on the sliding piece (21) and used for pushing the sliding piece (21) to move under the action of gravity; an ice crushing assembly (5) arranged on the sliding piece (21) and used for crushing the ice on the blade (12) under the action of the counterweight assembly (4) and moving downward; the limiting assembly (3) comprises: a limiting ring (31) and a limiting piece (32) respectively arranged on the body (1) and the end of the blade (12) away from the body (1), and the sliding piece (21) is positioned by abutting against the limiting ring (31) or the limiting piece (32); the limiting ring (31) is provided with an adsorption assembly (6), and the body (1) is provided with a pushing mechanism (7), and the adsorption assembly (6) comprises: an electromagnetic ring (61) rotatingly installed on the limiting ring (31) around the axis of the rotating shaft (11); a tension spring (62) arranged on the limiting ring (31) and connected with the electromagnetic ring (61); when the sliding piece (21) rotates to above the axis of the rotating shaft (11) and moves downward to abut against the limiting ring (31) to be positioned under the action of gravity, the sliding piece (21) abuts against the electromagnetic ring (61) after rotating, the electromagnetic ring (61) is adsorbed on the sliding piece (21) after being electrified and rotates and stretches the tension spring (62) under the action of the sliding piece (21); when the sliding piece (21) rotates below the axis of the rotating shaft (11), the sliding piece (21) moves to the pushing mechanism (7), the pushing mechanism (7) is started to push the sliding piece (21) to move downward, and the electromagnetic ring (61) is deenergized to make the sliding piece (21) move downward under the action of gravity and the pushing force.

2. The wind turbine blade de-icing device according to claim 1, characterized in that: the pushing mechanism (7) comprises: a pushing ring (71) slidingly arranged on the body (1) in the direction of approaching or moving away from the sliding piece (21); a pushing spring (72) arranged on the body (1) and the pushing ring (71); a positioning assembly (8) used for positioning the pushing ring (71), when the sliding piece (21) rotates below the rotating shaft (11), the positioning assembly (8) is unlocked to make the pushing ring (71) push the sliding piece (21) to move downward under the action of the pushing spring (72) and drive the pushing ring (71) to extrude the pushing spring (72) to move back to the original position.

3. The wind turbine blade de-icing device according to claim 2, wherein: the positioning assembly (8) comprises: an abutting plate (81) arranged on the electromagnetic ring (61) and abutting against the pushing ring (71) to be positioned, a passing hole (85) through which the pushing ring (71) passes is formed at the connection position of the abutting plate (81) and the electromagnetic ring (61), and the pushing ring (71) is slidingly installed on the passing hole (85) when pushing the sliding piece (21) to move downward and can block the abutting plate (81) from moving back; an extension piece (82) arranged on the body (1). A push plate (83) is arranged on the piston rod of the telescopic member (82) and abuts against the push ring (71) to drive the push ring (71) to move.

4. The wind turbine blade de-icing device according to claim 1, wherein: The counterweight assembly (4) comprises: A first counterweight (41) and a second counterweight (42) are arranged on the two opposite outer side walls of the sliding member (21) to counterweight the sliding member (21).

5. The wind turbine blade de-icing device according to claim 1, wherein: The ice crushing assembly (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, and the short ice crushing plates (52) are located between two adjacent long ice crushing plates (51) and cooperate to crush the ice.

6. The wind turbine blade de-icing device according to claim 1, wherein: A plurality of rolling balls (22) are arranged on the inner side wall of the sliding member (21) at intervals and roll on the blade (12).

7. The wind turbine blade de-icing device according to claim 1, wherein: The sliding member (21) is formed by screwing two sliding plates to each other.

8. An anti-icing method using the anti-icing device according to any one of claims 1 to 7, characterized by: The method comprises the following steps: The blade (12) rotates to drive the sliding member (21) to rotate; When the sliding member (21) is rotated to below the axis of the rotating shaft (11), the push mechanism (7) pushes the sliding member (21) downward, so that the sliding member (21) moves downward under the action of the pushing force and the gravity of the counterweight assembly (4), the ice crushing assembly (5) moves downward to remove the ice, and stops until abutting against the limiting member (32); When the sliding member (21) is rotated to above the axis of the rotating shaft (11), the sliding member (21) moves back under the action of the gravity, the ice crushing assembly (5) moves back to continue removing the ice on the blade (12), and stops until abutting against the limiting ring (31), and then the removing of the ice on the blade (12) is repeated.

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