A deicing device for a wind turbine generator set

Abstract

The present invention relates to the technical field of wind power generation, and discloses a deicing device for a wind turbine generator set, comprising a tower, a generator cabin and a controller, wherein a gearbox and a generator box are fixed inside the generator cabin, and a sleeve is fixed outside the gearbox, the sleeve is rotatably connected to a support shaft inside, a mounting ring is fixed outside the air supply pipe, and a linkage ring is rotatably connected inside the mounting ring, a blade is fixed to the linkage ring by bolts, and an ice detection sensor is fixed outside the blade. The deicing device for the wind turbine generator set, when the ice detection sensor detects that the blade is frozen, transmits wind into the inner cavity of the blade through a hot air blower to heat the blade and improve the efficiency of deicing the blade, and as the blade rotates, the sliding frame is affected by centrifugal force to move along the sliding rod, and during the movement, the hot air in the inner cavity of the blade is oscillated, thereby accelerating the diffusion of the hot air, thereby improving the efficiency of heating and deicing the blade.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, in particular to a deicing device for a wind power generator set. Background Art

[0002] A wind turbine is an electric device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. A wind turbine is generally composed of components such as a hub, blades, a generator cabin, and a tower. The working principle of a wind turbine is relatively simple. The blades drive the hub to rotate under the action of wind, and the hub drives the gearbox in the generator cabin to rotate, and then the generator generates electricity;

[0003] In order to ensure that wind turbines have enough wind power to drive the blades to rotate, wind turbines are usually installed in areas with high altitudes. When winter comes, the humidity in the air at high altitudes increases and the temperature drops, which will cause ice to appear on the surface of the wind turbine blades. Ice on the blades will change the aerodynamics of the blades, affect the load on the blades, and increase the mechanical wear of the hub. Therefore, the wind turbine blades need to be de-iced.

[0004] The blades of medium and large wind turbines are usually made hollow. Therefore, when deicing the blades, a heating device is generally used to introduce hot air into the inside of the blades through a pipe, and then heat the blades from the inside to complete the deicing operation of the blades.

[0005] However, the ice layer is generally condensed on the outside of the blade. When the temperature is raised from the inside of the blade to melt the ice layer, it is first necessary to fill the entire inner cavity of the blade with hot air. The speed at which the hot air fills the inner cavity of the blade is affected by the length of the blade itself. That is, the longer the blade, the greater the energy consumption and the longer the heating time. The increase in heating time will indirectly reduce the de-icing efficiency. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a deicing device for a wind turbine generator set, which solves the problems raised in the above-mentioned background technology.

[0007] The present invention provides the following technical solution: a deicing device for a wind turbine generator set, comprising a tower, a generator cabin and a controller, wherein a gearbox and a generator box are fixed inside the generator cabin, and a sleeve is fixed outside the gearbox, one end of the sleeve is fixed to the inner wall of the generator cabin, a support ring is fixed outside the generator cabin, a hot air blower is fixed inside the generator cabin, the hot air blower is controlled by the controller, and the hot air blower is connected to the sleeve;

[0008] The inner part of the sleeve is rotatably connected to a support shaft, a connecting rod is fixed to one end of the support shaft close to the hot air blower, a transmission wheel is fixed to one end of the connecting rod away from the support shaft, the transmission wheel is transmission-connected to a gearbox, a connecting sealing plate is fixed to the outside of one end of the support shaft away from the hot air blower, an air supply pipe is fixed to the center position of the connecting sealing plate away from the support shaft, and the support shaft and the air supply pipe are connected to each other, a wheel hub is fixed to one side of the connecting sealing plate away from the support shaft, and the wheel hub is rotatably connected to the support ring;

[0009] The outside of the air supply pipe is fixed with a mounting ring, and the number of the mounting rings is three. The inside of the mounting ring is rotatably connected with a linkage ring. The outside of the bottom end of the linkage ring is provided with teeth. The inside of the hub is fixed with a plurality of pitch control devices, and the pitch control devices are controlled by a controller. The number of the pitch control devices is three. The pitch control devices are composed of a fixing frame, a motor and a gear, and the gear of the pitch control device is meshed with the teeth of the linkage ring.

[0010] The linkage ring is fixed with blades by bolts, an ice detection sensor is fixed to the outside of the blade, and a diffusion component is arranged inside the blade, and the diffusion component is used to accelerate the diffusion of hot air.

[0011] Optionally, the diffusion assembly includes a guide tube, the top and bottom of the guide tube are respectively fixed to the top and bottom of the blade cavity, a gradient slide groove is opened on both sides of the guide tube, sliding rods are fixed on both sides of the bottom of the guide tube cavity, the outside of the sliding rod is slidably connected to a sliding frame, a first spring is fixed to the top and bottom of the sliding frame, a rubber pad is fixed to the end of the first spring away from the sliding frame, arc plates are fixed on both sides of the two ends of the sliding frame, the internal rotation of the two ends of the sliding frame is connected to the long-axis fan blades, and the sliding frame is slidably connected to the gradient slide groove.

[0012] Optionally, second springs are fixed on both sides of the bottom of the inner cavity of the guide tube, the second spring is provided with three circles in total, and an oscillation plate is fixed on the outside of each circle, and the length of the oscillation plate gradually increases from the tip of the blade to the root of the blade.

[0013] Optionally, two rows of through holes are evenly opened on the surface of the blade, and a first heat-conducting rod is fixed inside the through holes in a row close to the tower, one end of the first heat-conducting rod is away from the flow guide tube and is flush with the surface of the blade, one end of the first heat-conducting rod close to the flow guide tube is located inside the blade, and the first heat-conducting rod close to the end of the flow guide tube is rotatably connected to the inside of a first friction wheel, and a first fan blade is fixed inside the first friction wheel.

[0014] Optionally, a second heat-conducting rod is fixed inside the blade away from a row of through holes in the tower, an end of the second heat-conducting rod away from the flow guide tube is flush with the surface of the blade, an end of the second heat-conducting rod close to the flow guide tube is located inside the blade, and the interior of the second heat-conducting rod close to the flow guide tube is rotatably connected to a second friction wheel, and a second fan blade is fixed inside the second friction wheel.

[0015] Optionally, the first friction wheel and the second friction wheel are connected to the running track of the sliding frame.

[0016] Optionally, an exhaust port is provided inside the connecting sealing plate, an air port is provided on the surface of the generator compartment, and the connecting sealing plate is connected to the generator compartment through the exhaust port and the air port.

[0017] Optionally, the width of the gradient slide groove gradually decreases from the tip of the blade to the root of the blade, a rubber plate is fixed to the top of the slide rod, and an extension plate is fixed to the outside of the rubber plate away from one end of the slide rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The de-icing device of the wind turbine generator set starts the hot air blower when the ice detection sensor detects that the blade is frozen. The hot air blower transmits wind into the interior of the guide tube and transmits it to the inner cavity of the blade through the gradient slide groove, thereby heating the blade to melt the ice layer on the surface of the blade, thereby improving the efficiency of blade de-icing. As the natural wind drives the blade to rotate, centrifugal force is generated, and under the influence of the centrifugal force, the sliding frame moves back and forth along the sliding rod, and during the movement, the hot air in the inner cavity of the blade is oscillated, thereby accelerating the diffusion of the hot air, and at the same time making the inner cavity of the blade heated more evenly, thereby improving the efficiency of blade heating and de-icing.

[0020] 2. The de-icing device of the wind turbine generator set, when the sliding frame moves repeatedly along the sliding rod, contacts with each first friction wheel and the second friction wheel, and then drives each first friction wheel and the second friction wheel to rotate, so that the first heat-conducting rod is heated up by friction, and the second heat-conducting rod is heated up by friction. At the same time, under the heating effect of the hot air in the inner cavity, the first heat-conducting rod and the second heat-conducting rod are further heated, and then the temperature is transferred to the surface of the blade through the first heat-conducting rod and the second heat-conducting rod, thereby accelerating the melting speed of the ice layer on the blade surface, and then improving the efficiency of blade de-icing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is an internal view of the generator cabin structure of the present invention;

[0023] Figure 3It is a schematic diagram of the positional relationship among the support shaft, the connecting rod and the transmission wheel of the present invention;

[0024] Figure 4 This is an internal view of the structure of the wheel hub of the present invention;

[0025] Figure 5 It is a structural cross-sectional view of the wheel hub and the linkage ring of the present invention;

[0026] Figure 6 A partial cross-sectional view of a blade of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the first heat-conducting rod and the second heat-conducting rod of the present invention;

[0028] Figure 8 It is a structural front view of the flow guide pipe of the present invention;

[0029] Fig. 9 It is a schematic diagram of the positional relationship between the sliding frame and the sliding rod of the present invention;

[0030] Fig.10 is a schematic structural diagram of the second spring of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the present invention.

[0032] In the figure: 1. tower; 11. generator compartment; 12. casing; 13. support ring; 14. air port; 2. hot air blower; 3. support shaft; 31. connecting rod; 32. transmission wheel; 33. connecting cover plate; 34. exhaust port; 35. air supply pipe; 36. hub; 4. mounting ring; 41. linkage ring; 42. pitch control device; 5. blade; 6. guide tube; 61. gradual sliding groove; 62. sliding rod; 63. sliding frame; 64. first spring; 65. rubber pad; 66. arc plate; 67. long axis fan blade; 68. rubber plate; 69. extension plate; 7. second spring; 71. oscillation plate; 8. first heat conducting rod; 81. first friction wheel; 82. first fan blade; 83. second heat conducting rod; 84. second friction wheel; 85. second fan blade. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1-11A deicing device for a wind turbine generator set includes a tower 1, a generator cabin 11 and a controller. A gearbox and a generator box are fixed inside the generator cabin 11, and a sleeve 12 is fixed outside the gearbox. One end of the sleeve 12 is fixed to the inner wall of the generator cabin 11. A support ring 13 is fixed outside the generator cabin 11. A hot air blower 2 is fixed inside the generator cabin 11. The hot air blower 2 is controlled by the controller, and the hot air blower 2 is connected to the sleeve 12.

[0036] The inner part of the sleeve 12 is rotatably connected with the support shaft 3, a connecting rod 31 is fixed to the end of the support shaft 3 close to the hot air blower 2, a transmission wheel 32 is fixed to the end of the connecting rod 31 away from the support shaft 3, and the transmission wheel 32 is transmission-connected to the gearbox, a connecting sealing plate 33 is fixed to the outside of the end of the support shaft 3 away from the hot air blower 2, an air supply pipe 35 is fixed to the center position of the connecting sealing plate 33 away from the support shaft 3, and the support shaft 3 and the air supply pipe 35 are connected to each other, and a wheel hub 36 is fixed to the side of the connecting sealing plate 33 away from the support shaft 3, and the wheel hub 36 is rotatably connected to the support ring 13;

[0037] The outside of the air supply pipe 35 is fixed with a mounting ring 4, and the number of mounting rings 4 is three. The inside of the mounting ring 4 is rotatably connected with a linkage ring 41. The outside of the bottom end of the linkage ring 41 is provided with teeth. The inside of the hub 36 is fixed with a plurality of pitch control devices 42. The pitch control devices 42 are controlled by a controller, and the number of the pitch control devices 42 is three. The pitch control devices 42 are composed of a fixing frame, a motor and a gear, and the gear of the pitch control device 42 is meshed with the teeth of the linkage ring 41. The linkage ring 41 is fixed with a blade 5 by bolts, and a diffusion component is provided inside the blade 5. The diffusion component is used to accelerate the diffusion of hot air;

[0038] The diffusion component includes a guide tube 6, the top and bottom of the guide tube 6 are respectively fixed to the top and bottom of the inner cavity of the blade 5, the guide tube 6 is fixed to the bottom of the inner cavity of the blade 5, and a gradual sliding groove 61 is provided on both sides of the guide tube 6. Slide rods 62 are fixed on both sides of the bottom of the inner cavity of the guide tube 6, and a sliding frame 63 is slidably connected to the outside of the slide rod 62. A first spring 64 is fixed to the top and bottom of the sliding frame 63, and a rubber pad 65 is fixed to the end of the first spring 64 away from the sliding frame 63. Arc plates 66 are fixed on both sides of the two ends of the sliding frame 63, and the internal rotation of the two ends of the sliding frame 63 is connected to the long-axis fan blade 67, and the sliding frame 63 is slidably connected to the gradual sliding groove 61. An exhaust port 34 is provided inside the connecting sealing plate 33, and an air port 14 is provided on the surface of the generator cabin 11, and the connecting sealing plate 33 is connected to the generator cabin 11 through the exhaust port 34 and the air port 14;

[0039] During the specific operation, the support shaft 3 and the connecting rod 31 are located inside the sleeve 12, the top of the blade 5 is clamped inside the hub 36, and is fixed with the linkage ring 41 by bolts. When the blade 5 faces the wind, the natural wind force drives the blade 5 to rotate, the blade 5 drives the hub 36 to rotate, the hub 36 drives the connecting cover plate 33 to rotate, the connecting cover plate 33 drives the support shaft 3, the connecting rod 31 and the transmission wheel 32 to rotate, the transmission gearbox is controlled by the transmission wheel 32, and then the gearbox drives the generator box in the generator cabin 11 to generate electricity, thereby converting wind energy into mechanical energy and finally into electrical energy. This is the working principle of the wind turbine in the prior art. The existing horizontal axis wind turbines are equipped with a yaw control system and a pitch control system, and the existing wind turbines can be optionally equipped with an ice detection sensor, so the present invention will not be described in detail;

[0040] Specifically, when the ice detection sensor detects that an ice layer has formed on the surface of the blade 5, the controller can be used to start the hot air blower 2, and hot air is generated by the hot air blower 2 and transported into the inside of the sleeve 12. The hot air is transported into the inside of the support shaft 3 through the sleeve 12, and enters the inside of the air supply pipe 35 through the support shaft 3, so that the hot air is transported into the inside of each blade 5. Since the top and bottom of the guide tube 6 are respectively fixed to the top and bottom of the inner cavity of the blade 5, the hot air directly enters the inside of the guide tube 6. The hot air entering the guide tube 6 is transported toward the inner cavity of the blade 5 along the gradual sliding grooves 61 opened on both sides of the guide tube 6, so that the hot air gradually fills the inner cavity of the blade 5, and then the inner wall of the blade 5 is heated. The temperature of the blade 5 is raised by the heating of the inner wall of the blade 5, so that the blade 5 is heated as a whole, and then the ice layer on the outside of the blade 5 is gradually melted under the influence of heat, and then the ice layer falls off from the outside of the blade 5, so as to achieve the purpose of de-icing.

[0041] Furthermore, when the blade 5 is rotated by the natural wind force, the sliding frame 63 connected to the sliding rod 62 is affected by the centrifugal force and slides on the surface of the sliding rod 62. At the same time, when the blade 5 is lower than the height of the generator cabin 11, the sliding frame 63 slides along the sliding rod 62 from the root to the tip of the blade 5. When the blade 5 is higher than the height of the generator cabin 11, the sliding frame 63 slides along the sliding rod 62 from the tip to the root of the blade 5. As a result, when the blade 5 is rotating, the sliding frame 63 moves back and forth on the surface of the sliding rod 62.

[0042] The sliding frame 63 plays a role in stirring the hot air in the inner cavity of the blade 5 during the reciprocating movement, so that the sliding frame 63 in motion improves the uniformity of the hot air filling inside the blade 5, that is, the hot air blown by the hot air blower 2 can be more evenly filled into the inner cavity of the blade 5, reducing the possibility of uneven heat and cold of the inner wall of the blade 5 and subsequent breakage;

[0043] At the same time, due to the length of the blade 5 itself, after the hot air enters the interior of the blade 5 through the gradient slide 61, the heat gradually decays, and in the process of the reciprocating movement of the sliding frame 63, it plays a joint role, accelerating the speed of the hot air from the root of the blade 5 to the tip of the blade;

[0044] Furthermore, affected by air resistance and inertia, the sliding frame 63 drives the long-axis fan blade 67 to rotate during the reciprocating movement, and the long-axis fan blade 67 further plays a role in stirring the hot air in the air when rotating, so that the hot air can be more evenly filled into the inner cavity of the blade 5;

[0045] When the hot air blower 2 delivers hot air to the inside of the blade 5, the blade 5 rotates due to the influence of natural wind force. When the blade 5 rotates, it drives the hub 36 to rotate synchronously, and the hub 36 drives the connecting sealing plate 33 to rotate synchronously. The connecting sealing plate 33 drives the exhaust port 34 to rotate. During the rotation, the exhaust port 34 is aligned with the air port 14, so that the hub 36 is connected with the inside of the generator compartment 11, and then the excess hot air in the inner cavity of the blade 5 can be returned to the inside of the generator compartment 11, thereby avoiding excessive air pressure in the inner cavity of the blade 5.

[0046] It should be noted that when the pitch of the blade 5 needs to be changed, the pitch control device 42 can be started through the controller, and the motor of the pitch control device 42 drives the rotation of its gear, and then rotates through the gear transmission linkage ring 41, and then drives the blade 5 to adjust the steering through the linkage ring 41, thereby completing the pitch change operation. At the same time, when changing the pitch, the hot air can continue to be transported to the inside of the blade 5 through the hot air blower 2.

[0047] Embodiment 2:

[0048] Two rows of through holes are evenly opened on the surface of the blade 5, and a first heat-conducting rod 8 is fixed inside the row of through holes close to the tower 1, and one end of the first heat-conducting rod 8 away from the flow guide tube 6 is flush with the surface of the blade 5, and one end of the first heat-conducting rod 8 close to the flow guide tube 6 is located inside the blade 5, and the first friction wheel 81 is rotatably connected inside the end of the first heat-conducting rod 8 close to the flow guide tube 6, and a first fan blade 82 is fixed inside the first friction wheel 81;

[0049] A second heat-conducting rod 83 is fixed inside a row of through holes of the blade 5 away from the tower 1. One end of the second heat-conducting rod 83 away from the flow guide tube 6 is flush with the surface of the blade 5. One end of the second heat-conducting rod 83 close to the flow guide tube 6 is located inside the blade 5. The second heat-conducting rod 83 close to the flow guide tube 6 is internally rotatably connected to the second friction wheel 84. A second fan blade 85 is fixed inside the second friction wheel 84. The first friction wheel 81 and the second friction wheel 84 are connected to the running track of the sliding frame 63.

[0050] Specifically, when the hot air blower 2 conveys the hot air into the inner cavity of the blade 5 through the sleeve 12, the support shaft 3, the air supply pipe 35 and the guide pipe 6 in sequence, the hot air gradually fills the inner cavity of the blade 5, thereby increasing the internal temperature of the blade 5. When the internal temperature of the blade 5 increases, the surface temperature of the first heat-conducting rod 8 and the second heat-conducting rod 83 increases. Under the conduction of the first heat-conducting rod 8 and the second heat-conducting rod 83, the temperature inside the blade 5 is transferred to the surface of the blade 5, thereby increasing the surface temperature of the blade 5. When the surface temperature of the blade 5 increases, the melting speed of the ice layer on the surface of the blade 5 can be accelerated, and the adhesion of the ice layer to the surface of the blade 5 is reduced, thereby improving the de-icing efficiency of the present invention.

[0051] At the same time, based on the first embodiment, when the blade 5 is affected by natural wind force and rotates, the sliding frame 63 is affected by centrifugal force and gravity and reciprocates on the surface of the sliding rod 62, and the two ends of the sliding frame 63 contact the first friction wheel 81 and the second friction wheel 84 during the reciprocating movement. When the two ends of the sliding frame 63 contact the first friction wheel 81 and the second friction wheel 84, the first friction wheel 81 and the second friction wheel 84 are driven to rotate. When the first friction wheel 81 rotates, the first friction wheel 81 rubs the first heat-conducting rod 8, and then the first heat-conducting rod 8 is heated by friction, which further increases the temperature of the first heat-conducting rod 8 itself, and then the heat transfer from the first heat-conducting rod 8 to the surface of the blade 5 is faster, thereby improving the efficiency of deicing the surface of the blade 5;

[0052] Similarly, when the second friction wheel 84 rotates, it rubs the second heat-conducting rod 83, so that the second heat-conducting rod 83 is heated by friction. After the temperature of the second heat-conducting rod 83 is increased, the heat transfer to the surface of the blade 5 is accelerated, and the efficiency of deicing the surface of the blade 5 is further improved.

[0053] At the same time, when the first friction wheel 81 is rotating, the first friction wheel 81 drives the first blade 82 to rotate synchronously. When the first blade 82 rotates, it stirs the hot air around it, further improving the efficiency of evenly filling the hot air into various parts of the inner cavity of the blade 5. Similarly, when the second friction wheel 84 is rotating, it drives the second blade 85 to rotate synchronously, and then the second blade 85 stirs the hot air around it, which also improves the uniformity of hot air filling in the blade 5.

[0054] It should be noted that the interior of the first friction wheel 81 and the second friction wheel 84 are hollow, and the surfaces of the first friction wheel 81 and the second friction wheel 84 are provided with ventilation holes, so that the first friction wheel 81 and the second friction wheel 84 can not only rotate under the friction of the sliding frame 63, but also the first fan blade 82 and the second friction wheel 84 can be affected by the hot wind and can also drive the first friction wheel 81 and the second friction wheel 84 to rotate, thereby ensuring that the first friction wheel 81 can always perform friction heating on the first heat-conducting rod 8, and the second friction wheel 84 can always perform friction heating on the second heat-conducting rod 83, thereby increasing the speed of heating the surface of the blade 5 and further improving the efficiency of de-icing on the surface of the blade 5.

[0055] Embodiment three:

[0056] The second spring 7 is fixed on both sides of the bottom of the inner cavity of the guide tube 6. The second spring 7 has three circles in total, and an oscillation plate 71 is fixed on the outside of each circle. The length of the oscillation plate 71 gradually increases from the tip of the blade 5 to the root of the blade. The width of the gradient slide 61 gradually decreases from the tip of the blade 5 to the root of the blade. A rubber plate 68 is fixed on the top of the slide rod 62, and an extension plate 69 is fixed on the outside of the rubber plate 68 away from the end of the slide rod 62.

[0057] Specifically, when the hot air delivered by the hot air blower 2 enters the interior of the guide tube 6, the width of the gradual chute 61 gradually decreases from the tip of the blade 5 to the root of the blade, that is, the closer to the root of the blade, the narrower the width of the gradual chute 61, and the closer to the root of the blade, the less air flow the gradual chute 61 delivers;

[0058] Similarly, the closer to the blade tip, the wider the width of the gradual chute 61 is, and the closer to the blade tip, the greater the air supply of the gradual chute 61 is. Therefore, by increasing the air supply near the blade tip of the blade 5, the hot air filling of the inner cavity of the blade 5 is balanced, and then the hot air diffusion in the inner cavity of the blade 5 is made more uniform, which reduces the occurrence of uneven heat and cold when the inner cavity of the blade 5 is heated, and also reduces the probability of cracking of the inner wall of the blade 5 due to uneven heat and cold, ensuring that the temperature in the inner cavity of the blade 5 can be more evenly and stably increased, thereby increasing the service life of the blade 5;

[0059] Furthermore, when the sliding frame 63 reciprocates along the sliding rod 62, when the sliding frame 63 moves toward the tip of the blade 5, it gradually approaches the second spring 7 until it contacts the second spring 7. At this time, the sliding frame 63 is buffered by the second spring 7, thereby reducing the vibration generated when the sliding frame 63 moves, thereby preventing the sliding frame 63 from directly touching the top and bottom of the inner cavity of the blade 5 during movement, thereby reducing the impact of the sliding frame 63 on the blade 5 itself. At the same time, after the sliding frame 63 contacts the second spring 7, the second spring 7 contracts after being pressed. As the sliding frame 63 moves away, the second spring 7 is reset. During the reset process, the second spring 7 drives the oscillation plate 71 to vibrate briefly. The vibration of the oscillation plate 71 stirs the air, thereby making the hot air at the tip of the blade 5 diffuse more evenly.

[0060] At the same time, when the blades 5 are rotated by natural wind force, the sliding frame 63 is in a reciprocating state, that is, the second spring 7 is also in an intermittent repetitive vibration state, that is, the oscillation plate 71 is in an intermittent, reciprocating vibration state, and then the oscillation plate 71 is in an intermittent vibration state;

[0061] Furthermore, during the movement, the sliding frame 63 gradually approaches the rubber plate 68 until it contacts the rubber plate 68, and the sliding frame 63 is cushioned by the rubber plate 68. At the same time, the impact of the sliding frame 63 can also drive the extension plate 69 to vibrate, thereby accelerating the diffusion of the hot air during the vibration of the rubber plate 68.

[0062] It should be noted that due to the length limitation of the blade 5, when the blade 5 rotates under the influence of natural wind force, it is difficult for the sliding frame 63 to ensure that there is enough time for the sliding frame 63 to return to the position of the rubber plate 68 under the influence of gravity. Therefore, multiple sliding frames 63 can be added. By adding sliding frames 63, each sliding frame 63 can be moved outside the slide bar 62, so that the moving distance of each sliding frame 63 can be shortened, that is, the distance between the sliding frame 63 closest to the rubber plate 68 and the rubber plate 68 is shortened. Under the premise of shortening the distance, it is ensured that the sliding frame 63 closest to the rubber plate 68 can be reset to the most initial position;

[0063] At the same time, due to the addition of the sliding frame 63, the top and bottom of the sliding frame 63 are fixed with the first spring 64. Therefore, when each sliding frame 63 moves, each first spring 64 and the rubber pad 65 will contact each other. When the first spring 64 and the rubber pad 65 of each sliding frame 63 contact, vibration will be generated between each sliding frame 63. The vibrating sliding frame 63 further accelerates the diffusion of hot air in the inner cavity of the blade 5, thereby further improving the uniformity and speed of hot air diffusion.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deicing device for a wind turbine generator set, comprising a tower (1), a generator cabin (11) and a controller, wherein a gearbox and a generator box are fixed inside the generator cabin (11), and a sleeve (12) is fixed outside the gearbox, and one end of the sleeve (12) is fixed to the inner wall of the generator cabin (11), characterized in that: A support ring (13) is fixed to the outside of the generator compartment (11), a hot air blower (2) is fixed to the inside of the generator compartment (11), the hot air blower (2) is controlled by a controller, and the hot air blower (2) and the casing (12) are in communication; The sleeve (12) is rotatably connected to the support shaft (3), a connecting rod (31) is fixed to one end of the support shaft (3) close to the hot air blower (2), a driving wheel (32) is fixed to one end of the connecting rod (31) away from the support shaft (3), the driving wheel (32) is drivingly connected to the gearbox, a connecting sealing plate (33) is fixed to the outside of the end of the support shaft (3) away from the hot air blower (2), an air supply pipe (35) is fixed to the center position of the side of the connecting sealing plate (33) away from the support shaft (3), and the support shaft (3) and the air supply pipe (35) are connected to each other, and a wheel hub (36) is fixed to one side of the connecting sealing plate (33) away from the support shaft (3), and the wheel hub (36) is rotatably connected to the support ring (13); A mounting ring (4) is fixed to the outside of the air supply pipe (35), and the number of the mounting rings (4) is three. The inside of the mounting rings (4) is rotatably connected to a linkage ring (41), and the outside of the bottom end of the linkage ring (41) is provided with teeth. A plurality of pitch control devices (42) are fixed to the inside of the wheel hub (36), and the pitch control devices (42) are controlled by a controller. The number of the pitch control devices (42) is three, and the pitch control devices (42) are composed of a fixing frame, a motor, and a gear, and the gear of the pitch control device (42) meshes with the teeth of the linkage ring (41); The linkage ring (41) is fixed with a blade (5) by means of bolts, an ice detection sensor is fixed to the outside of the blade (5), and a diffusion component is provided inside the blade (5), and the diffusion component is used to accelerate the diffusion of hot air; The diffusion component comprises a flow guide tube (6), the top and bottom of the flow guide tube (6) are respectively fixed to the top and bottom of the inner cavity of the blade (5), a gradient slide groove (61) is provided on both sides of the flow guide tube (6), sliding rods (62) are fixed on both sides of the inner cavity bottom of the flow guide tube (6), the outside of the sliding rod (62) is slidably connected to a sliding frame (63), the top and bottom of the sliding frame (63) are fixed with a first spring (64), both sides of the two ends of the sliding frame (63) are fixed with an arc plate (66), the inside of the two ends of the sliding frame (63) is rotatably connected to a long-axis fan blade (67), a first heat-conducting rod (8) is fixed inside a through hole in a row close to the tower (1), and the inside of the first heat-conducting rod (8) close to one end of the flow guide tube (6) is rotatably connected to a first friction wheel (81), and the inside of the first friction wheel (81) is fixed with a first fan blade (82); A second heat conducting rod (83) is fixed inside a row of through holes of the blade (5) away from the tower (1), and the second heat conducting rod (83) is rotatably connected inside one end of the flow guide tube (6) by a second friction wheel (84), and a second fan blade (85) is fixed inside the second friction wheel (84).

2. A deicing device for a wind turbine generator set according to claim 1, characterized in that: A rubber pad (65) is fixed to one end of the first spring (64) away from the sliding frame (63), and the sliding frame (63) is slidably connected to the gradual sliding groove (61).

3. A deicing device for a wind turbine generator set according to claim 2, characterized in that: Second springs (7) are fixed on both sides of the bottom of the inner cavity of the guide tube (6). The second spring (7) is provided with three turns in total, and an oscillation plate (71) is fixed outside each turn. The length of the oscillation plate (71) gradually increases from the tip of the blade (5) to the root of the blade.

4. A deicing device for a wind turbine generator set according to claim 3, characterized in that: Two rows of through holes are evenly formed on the surface of the blade (5); an end of the first heat conducting rod (8) away from the flow guiding tube (6) is flush with the surface of the blade (5); and an end of the first heat conducting rod (8) close to the flow guiding tube (6) is located inside the blade (5).

5. A deicing device for a wind turbine generator set according to claim 4, characterized in that: One end of the second heat conducting rod (83) away from the flow guiding tube (6) is flush with the surface of the blade (5), and one end of the second heat conducting rod (83) close to the flow guiding tube (6) is located inside the blade (5).

6. A deicing device for a wind turbine generator set according to claim 5, characterized in that: The first friction wheel (81) and the second friction wheel (84) are connected to the running track of the sliding frame (63).

7. A deicing device for a wind turbine generator set according to claim 6, characterized in that: An exhaust port (34) is provided inside the connecting sealing plate (33), an air port (14) is provided on the surface of the generator cabin (11), and the connecting sealing plate (33) is connected to the generator cabin (11) through the exhaust port (34) and the air port (14).

8. A deicing device for a wind turbine generator set according to claim 7, characterized in that: The width of the gradual sliding groove (61) gradually decreases from the tip of the blade (5) to the root of the blade. A rubber plate (68) is fixed to the top of the sliding rod (62). An extension plate (69) is fixed to the outside of the rubber plate (68) away from the end of the sliding rod (62).

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