Wind power blade deicing device and deicing method thereof

Abstract

The invention relates to the technical field of wind driven generators, in particular to a wind power blade deicing device and a deicing method thereof. According to the technical scheme, the deicing assembly comprises a circulating heat pipe, a heat conduction assembly making contact with a wind driven generator is arranged at the end of the circulating heat pipe, the circulating heat pipe is fixedly installed in a blade, a water flow drawing pipe is fixedly installed in the middle of the circulating heat pipe, and one-way valves are fixedly installed at an inlet and an outlet of the water flow drawing pipe correspondingly; and the interior of the water flow drawing pipe is slidably connected with a piston. The temperature of water in the circulating heat pipe is increased through heat of the wind driven generator, the toothed plate is driven by angle change in the rotating process of the blades to reciprocate, so that the drawing rod and the piston reciprocate to continuously draw water and drain water, the flowing direction of the water in the circulating heat pipe is controlled through the two one-way valves, and the heat utilization rate is increased; and the water temperature in the circulating heat pipe is uniform, and the blades are uniformly heated to melt an ice layer.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine generators, and in particular to a wind turbine blade deicing device and a deicing method thereof. Background Art

[0002] Wind turbines, also known as wind generators, are devices that convert wind energy into mechanical work, which then drives the generator to generate electricity. When ice forms on the surface of wind turbine blades, it changes the aerodynamic shape of the blades, increases wind resistance, reduces the efficiency of the blades in capturing wind energy, and causes a decrease in power generation. De-icing devices can remove ice from the blades in a timely manner, allowing the blades to maintain a good aerodynamic shape, ensuring that wind turbines can still operate efficiently in cold weather conditions and maintain stable power generation.

[0003] In the patent document with announcement number CN217518795U, an air-heating deicing and anti-frost device for wind turbine blades is proposed. The electric heating wire and the heating tube begin to heat up, and at the same time, the motor drives the fan to rotate and blow air. The wind enters multiple fan blades to form hot air, thereby heating and defrosting the fan blades. When the air pressure in the fan blades increases, the sealing plate will rotate forward and open in the wind groove. At the same time, the connecting rod extends out of the sleeve and rotates between the fixed frame. The slider slides to a suitable position in the slide groove and remains connected to the sealing plate. The hot air can be blown out along the bottom end of the sealing plate through the wind groove to directly heat the surface of the fan blade. The fan blade and the surface of the fan blade can be quickly blown and heated through the deicing mechanism and the sealing mechanism.

[0004] However, wind turbine blades are large in size and require a lot of heat. Moreover, heating through heating wires and heating tubes consumes a lot of electricity. Most of the electricity generated by wind power generation will be consumed by the heating wires and heating tubes, resulting in a waste of electricity. Summary of the invention

[0005] The purpose of the present invention is to address the problem in the background technology that heating wires and heating tubes consume electric energy to heat power generation blades, resulting in electric energy waste, and to propose a wind turbine blade deicing device and deicing method.

[0006] The technical solution of the present invention is to propose a wind turbine blade deicing device, comprising a tower, a cabin is fixedly installed on the top of the tower, a wind turbine generator is fixedly installed inside the cabin, and the end output shaft of the wind turbine generator is connected with a blade; The deicing assembly comprises a circulating heat pipe, the end of which is provided with a heat-conducting assembly in contact with the wind turbine, the circulating heat pipe being fixedly installed inside the blade, a water flow drawing pipe being fixedly installed in the middle of the circulating heat pipe, one-way valves being fixedly installed at the inlet and outlet positions of the water flow drawing pipe, a piston being slidably connected inside the water flow drawing pipe, a drawing rod penetrating from the inside of the water flow drawing pipe being fixedly installed on the side of the piston, and a pumping member being provided on the side of the drawing rod and close to the end position; A cavity with multiple reflective surfaces built in is provided inside the blade and at the position of the extension line of the end of the pull rod, and the cavity extends to both ends of the blade; A locking assembly for positioning a water pumping member is arranged inside the blade, and a heat retaining assembly is arranged inside the nacelle.

[0007] Optionally, the inside of the blade is fixedly connected to a guide rod, and a tooth plate is slidably connected to the guide rod. The side of the tooth plate is engaged with the pumping member. When the piston slides inside the water flow drawing tube, it is always located on the right side of the water outlet of the water flow drawing tube, and the water inside the circulating heat pipe flows clockwise.

[0008] Optionally, the water pumping part includes a gear cylinder, the inner arc surface of the gear cylinder is provided with a wave slide, a follower ball is fixedly installed on the end of the pull-out rod, the follower ball slides in the wave slide, a directional limit block is fixedly installed on the rod body of the pull-out rod, the limit block is slidably connected to the water flow pull-out tube, and the tooth plate is meshingly connected to the gear cylinder through teeth.

[0009] Optionally, the heat-conducting assembly includes a first heat-conducting tube, which is fixedly installed inside the cabin, the inner wall of the first heat-conducting tube is fixedly connected to the wind turbine, the inner wall of the first heat-conducting tube is rotatably connected to a second heat-conducting tube, and the side of the second heat-conducting tube is fixedly connected to the circulating heat pipe.

[0010] Optionally, the locking assembly includes a plurality of bimetallic thermometers, two bimetallic thermometers are fixedly installed inside each blade, a heat-conducting column extending to the outside of the blade is fixedly installed at the center of the bimetallic thermometer, a wedge block is slidably connected to the inside of the blade, a lifting piece is provided between the wedge block and the bimetallic thermometer, and a clamping plate is fixedly installed on the end of the tooth plate, and the clamping plate is clamped with the wedge block.

[0011] Optionally, the lifting member includes an avoidance groove, which is opened inside the blade and perpendicular to the tooth plate, and the avoidance groove is slidably connected to the inside of the avoidance groove with an avoidance spring, which is fixedly installed at the bottom of the wedge block, and a lifting block is fixedly installed at the bottom of the avoidance spring, and a guide telescopic rod is fixedly installed between the bottom of the lifting block and the blade, and the elastic force of the bimetallic thermometer is stronger than the elastic force of the avoidance spring.

[0012] Optionally, an extension piece is fixedly mounted on the end of the bimetallic thermometer, and a roller is rotatably connected to the end of the extension piece. The roller is embedded in the bottom of the lifting block and slides on the bottom of the lifting block.

[0013] Optionally, the heat retention component includes a heat dissipation cavity, which is opened inside the nacelle and located at the right end of the wind turbine. A plurality of first inclined holes are opened at the right end of the nacelle, and the first inclined holes are inclined. A baffle plate is connected to the inside of the nacelle for sliding up and down, and a plurality of second inclined holes are opened on the baffle plate, and the baffle plate is aligned with the positions of the second inclined holes.

[0014] Optionally, an evaporation chamber filled with ether is fixedly installed at the bottom of the cabin, an airbag is fixedly installed inside the cabin and below the baffle, and the evaporation chamber is connected to the airbag.

[0015] A wind turbine blade deicing method is also proposed, which is applied to the above-mentioned wind turbine blade deicing device, and the steps are as follows: S1. The heat generated by the wind turbine during operation is absorbed by the first heat-conducting tube. During normal operation, the winding temperature of the wind turbine is usually between 90°C and 130°C. The heat of the wind turbine is transferred to the water inside the circulating heat pipe through the first heat-conducting tube and the second heat-conducting tube. The circulating heat pipe is used to heat the blades and the ice layer on the surface of the blades. S2. During the rotation of the blades, the tooth plate reciprocates along the guide rod and drives the gear cylinder to rotate, so that the follower ball slides along the wave slideway to make the pull rod reciprocate. The limit block prevents the pull rod from rotating with the gear cylinder. The pull rod uses the piston to pump and release water, so that the water inside the circulating heat pipe flows clockwise to prevent uneven water temperature inside the circulating heat pipe; S3. During the reciprocating motion of the pull rod, the pull rod hits the cavity inside the blade, and uses multiple reflection surfaces inside the cavity to make the sound wave reflect multiple times in the cavity, increasing the interaction between the sound wave and the cavity wall, so that the vibration energy is better distributed and accumulated in the cavity, improving the vibration effect, and when the surface temperature of the blade rises to a certain temperature, the adhesion of ice is reduced, and the de-icing effect is improved by using vibration; S4. The external temperature is transferred to the bimetallic thermometer through the heat-conducting column. When the ambient temperature is low, the bimetallic thermometer contracts so that the wedge is retracted into the avoidance groove and the tooth plate moves normally. When the ambient temperature is high, the bimetallic thermometer expands so that the wedge extends out of the avoidance groove. The wedge cooperates with the card plate to position the tooth plate. When the ambient temperature is high, the deicing assembly stops running to reduce vibration. S5. When the ambient temperature is higher than 20°C, the ether inside the evaporation chamber is heated to form gas, which expands the airbag so that the second inclined hole is aligned with the first inclined hole to dissipate heat for the wind turbine. When the ambient temperature is lower than 20°C, the ether inside the evaporation chamber is heated to cool into liquid, which shrinks the airbag so that the second inclined hole is misaligned with the first inclined hole to keep the wind turbine warm.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: 1. The present invention heats the temperature of water in the circulating heat pipe by the heat of the wind turbine, and utilizes the angle change during the rotation of the blades to drive the tooth plate to reciprocate, so that the pull rod and the piston reciprocate, and continuously pump and release water. Two one-way valves are used to control the flow direction of water in the circulating heat pipe, thereby improving the utilization rate of heat, making the water temperature inside the circulating heat pipe uniform, and uniformly heating the blades to melt the ice layer. The heat from the operation of the wind turbine is utilized without consuming electrical energy.

[0017] 2. The present invention transfers the external temperature to the bimetallic thermometer through the heat-conducting column. When the ambient temperature is high, the bimetallic thermometer is unfolded so that the wedge block extends from the avoidance groove. The wedge block cooperates with the clamping plate to position the tooth plate. When the ambient temperature is high, the surface of the blade will not freeze, thereby reducing the operation of the deicing component and avoiding the wear of the tooth plate and the pull rod hitting the cavity.

[0018] 3. The present invention adjusts the positional relationship between the second inclined hole and the first inclined hole according to the ambient temperature. When the ambient temperature is high, the second inclined hole is aligned with the first inclined hole to dissipate heat for the wind turbine. When the ambient temperature is low, the second inclined hole is offset from the first inclined hole to insulate the wind turbine and avoid heat loss, so as to make full use of the heat to de-ice the blades. When the temperature is high, the temperature is reduced in time to avoid damage to the wind turbine due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Provide the overall structural schematic diagram of the present invention; Figure 2 A schematic cross-sectional view of the cabin structure of the present invention is given; Figure 3 A schematic cross-sectional view of the blade structure of the present invention is provided; Figure 4 for Figure 3 A part of the one-way valve structure enlarged schematic diagram; Figure 5 for Figure 3 An enlarged schematic diagram of the tooth plate structure of part B; Figure 6 A schematic diagram of the circulating heat pipe structure of the present invention is given. Figure 7 A schematic diagram of the follower ball structure of the present invention is given; Figure 8 A schematic diagram of a front and cross-sectional view of a water flow drawing pipe structure of the present invention is provided; Fig. 9 A schematic structural diagram of a bimetallic thermometer of the present invention is provided; Fig.10 A schematic front and cross-sectional view of the cabin structure of the present invention is given.

[0020] Figure numerals: 1. tower; 2. cabin; 3. wind turbine; 4. blades; 5. de-icing assembly; 51. first heat-conducting tube; 52. second heat-conducting tube; 53. circulating heat pipe; 54. water flow pulling tube; 55. one-way valve; 56. gear tube; 57. gear plate; 58. wave slide; 59. piston; 510. pulling rod; 511. following ball; 512. limiting block; 6. locking assembly; 61. card plate; 62. avoidance groove; 63. wedge block; 64. thermal conductive column; 65. bimetallic thermometer; 66. extension sheet; 67. roller; 68. lifting block; 69. avoidance spring; 7. heat retention assembly; 71. heat dissipation cavity; 72. first inclined hole; 73. shielding plate; 74. second inclined hole; 75. evaporation chamber; 76. airbag. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1: This embodiment proposes a wind turbine blade deicing device, such as Figure 1 and Figure 2 As shown, it comprises a tower 1, a cabin 2 is fixedly installed on the top of the tower 1, a wind turbine 3 is fixedly installed inside the cabin 2, and a blade 4 is connected to the output shaft at the end of the wind turbine 3.

[0027] like Figure 2 and Figure 3 As shown, a deicing assembly 5 is provided inside the blade 4, and the deicing assembly 5 includes a circulating heat pipe 53. A heat-conducting assembly in contact with the wind turbine 3 is provided at the end of the circulating heat pipe 53. The circulating heat pipe 53 is fixedly installed inside the blade 4. The heat-conducting assembly includes a first heat-conducting tube 51. The first heat-conducting tube 51 is fixedly installed inside the cabin 2. The inner wall of the first heat-conducting tube 51 is fixedly connected to the wind turbine 3. The inner wall of the first heat-conducting tube 51 is rotatably connected to the second heat-conducting tube 52. The side of the second heat-conducting tube 52 is fixedly connected to the circulating heat pipe 53.

[0028] During normal operation, the winding temperature of the wind turbine 3 is usually between 90°C and 130°C. The first heat-conducting tube 51 absorbs the heat generated by the wind turbine 3 during operation. The first heat-conducting tube 51 and the second heat-conducting tube 52 transfer the heat from the wind turbine 3 to the water inside the circulating heat pipe 53. The circulating heat pipe 53 is used to heat the blades 4 to melt the ice on their surface.

[0029] like Figure 4 and Figure 6 As shown, a water flow drawing pipe 54 is fixedly installed in the middle of the circulating heat pipe 53. Figure 7 and Figure 8 As shown, a piston 59 is slidably connected to the inside of the water flow drawing tube 54, and a drawing rod 510 that passes through the inside of the water flow drawing tube 54 is fixedly installed on the side of the piston 59. A pumping part is arranged on the side of the drawing rod 510 near the end, and the pumping part includes a gear cylinder 56. A wave slide 58 is provided on the inner arc surface of the gear cylinder 56. A follower ball 511 is fixedly installed on the end of the drawing rod 510, and the follower ball 511 slides in the wave slide 58.

[0030] A directional limiting block 512 is fixedly installed on the rod body of the pulling rod 510 . The limiting block 512 is slidably connected to the water flow pulling tube 54 . The limiting block 512 prevents the pulling rod 510 from rotating along with the gear cylinder 56 .

[0031] like Figure 4 and Figure 6 As shown, the inside of the blade 4 is fixedly installed with a guide rod, and the guide rod is slidably connected with a tooth plate 57. The tooth plate 57 is meshed with the gear cylinder 56 through teeth. During the rotation of the blade 4, the direction of the blade 4 is constantly changing, so that the tooth plate 57 reciprocates. The tooth plate 57 drives the gear cylinder 56 to rotate, so that the follower ball 511 slides along the wave slide 58. Since the wave slide 58 is a wave-like structure, the follower ball 511 reciprocates left and right. Therefore, the pull rod 510 drives the piston 59 to continuously pump and release water, so that the water inside the circulating heat pipe 53 flows clockwise, preventing the water temperature inside the circulating heat pipe 53 from being uneven, so as to improve the utilization rate of heat.

[0032] One-way valves 55 are fixedly installed at the inlet and outlet of the water flow drawing pipe 54. The two one-way valves 55 control the direction of water flow in the circulating heat pipe 53 to prevent the water in the circulating heat pipe 53 from flowing back. The guide rod inside the blade 4 controls the distance between the tooth plate 57 and the gear cylinder 56 to prevent the distance between the tooth plate 57 and the gear cylinder 56 from changing due to the angle change of the blade 4.

[0033] A cavity with multiple reflective surfaces is provided inside the blade 4 and at the position of the extension line of the end of the pull-out rod 510. The cavity extends to both ends of the blade 4. When the pull-out rod 510 is pumping water, the pull-out rod 510 hits the cavity inside the blade 4 to generate vibration and sound waves, and utilizes the multiple reflective surfaces inside the cavity to make the sound waves reflect multiple times in the cavity, thereby increasing the interaction between the sound waves and the cavity wall, so that the vibration energy is better distributed and accumulated in the cavity, improving the vibration effect, and when the surface temperature of the blade 4 rises to a certain temperature, the adhesion of the ice is reduced. At this time, the ice with low adhesion is shaken off by vibration, thereby improving the de-icing efficiency.

[0034] In this embodiment, the temperature of the water in the circulating heat pipe 53 is heated by the heat of the wind turbine 3, and the angle change during the rotation of the blades 4 is used to drive the tooth plate 57 to reciprocate, so that the pull rod 510 and the piston 59 reciprocate to continuously pump and release water. The two one-way valves 55 are used to control the flow direction of the water in the circulating heat pipe 53, improve the utilization rate of heat, make the water temperature inside the circulating heat pipe 53 uniform, and evenly heat the blades 4 to melt the ice layer.

[0035] Embodiment 2: Based on Embodiment 1, this embodiment proposes a wind turbine blade deicing device, such as Figure 5 and Fig. 9As shown, a locking assembly 6 for positioning the pumping member is provided inside the blade 4, and the locking assembly 6 includes a plurality of bimetallic thermometers 65. Two bimetallic thermometers 65 are fixedly installed inside each blade 4, and a heat-conducting column 64 extending to the outside of the blade 4 is fixedly installed at the center of the bimetallic thermometer 65. A wedge block 63 is slidably connected inside the blade 4, and a lifting member is provided between the wedge block 63 and the bimetallic thermometer 65. A clamping plate 61 is fixedly installed at the end of the tooth plate 57, and the clamping plate 61 is clamped with the wedge block 63.

[0036] The ambient temperature is transferred to the bimetallic thermometer 65 through the heat-conducting column 64. When the ambient temperature is low, the bimetallic thermometer 65 contracts, and the bimetallic thermometer 65 uses a lifting piece to dislocate the wedge block 63 and the tooth plate 57. At this time, the tooth plate 57 reciprocates. When the ambient temperature is high, the bimetallic thermometer 65 expands, and the bimetallic thermometer 65 uses a lifting piece to move the wedge block 63 to the end extension line of the tooth plate 57. As the tooth plate 57 slides, the tooth plate 57 squeezes the wedge block 63.

[0037] The lifting member includes an avoidance groove 62, which is opened inside the blade 4 and perpendicular to the tooth plate 57. An avoidance spring 69 is slidably connected inside the avoidance groove 62. The avoidance spring 69 is fixedly installed at the bottom of the wedge block 63. A lifting block 68 is fixedly installed at the bottom of the avoidance spring 69. A guide telescopic rod is fixedly installed between the bottom of the lifting block 68 and the blade 4. The elastic force of the bimetallic thermometer 65 is stronger than that of the avoidance spring 69.

[0038] When the ambient temperature is high, the wedge block 63 is located on the moving path of the tooth plate 57. After the wedge block 63 is subjected to the extrusion force, the wedge block 63 presses down the avoidance spring 69 and the lifting block 68. Since the elastic force of the bimetallic thermometer 65 is stronger than the elastic force of the avoidance spring 69, the avoidance spring 69 will be compressed first. Then, when the card plate 61 passes over the wedge block 63, the avoidance spring 69 resets the wedge block 63 so that the wedge block 63 clamps the card plate 61, thereby fixing the tooth plate 57. When the ambient temperature is high, the surface of the blade 4 will not freeze, so there is no need for deicing, reducing the wear of the tooth plate 57 and the pull rod 510 hitting the cavity.

[0039] like Fig. 9 As shown, an extension piece 66 is fixedly installed at the end of the bimetallic thermometer 65, and a roller 67 is rotatably connected to the end of the extension piece 66. The roller 67 is embedded in the bottom of the lifting block 68 and slides on the bottom of the lifting block 68. The extension piece 66 and the roller 67 cooperate to prevent the bimetallic thermometer 65 from being stuck by the lifting block 68.

[0040] In this embodiment, the external temperature is transferred to the bimetallic thermometer 65 through the heat-conducting column 64. When the ambient temperature is high, the bimetallic thermometer 65 is expanded so that the wedge block 63 extends from the avoidance groove 62. The wedge block 63 cooperates with the clamping plate 61 to position the tooth plate 57. When the ambient temperature is high, the surface of the blade 4 will not freeze, thereby reducing the operation of the de-icing assembly 5 and avoiding the wear of the tooth plate 57 and the pull rod 510 hitting the cavity.

[0041] Embodiment 3: Based on the above embodiment 1 or 2, this embodiment proposes a wind turbine blade deicing device, such as Figure 2 and Fig.10 As shown, a heat retention component 7 is provided inside the nacelle 2, and the heat retention component 7 includes a heat dissipation cavity 71. The heat dissipation cavity 71 is opened inside the nacelle 2 and is located at the right end of the wind turbine 3. A plurality of first inclined holes 72 are opened at the right end of the nacelle 2, and the first inclined holes 72 are inclinedly arranged. A baffle plate 73 is connected to the inside of the nacelle 2 for sliding up and down, and a plurality of second inclined holes 74 are opened on the baffle plate 73, and the positions of the baffle plate 73 and the second inclined holes 74 are aligned.

[0042] An evaporation chamber 75 filled with ether is fixedly installed at the bottom of the cabin 2 , and an air bag 76 is fixedly installed inside the cabin 2 and below the shielding plate 73 , and the evaporation chamber 75 is in communication with the air bag 76 .

[0043] When the ambient temperature is higher than 20°C, the ether inside the evaporation chamber 75 is heated to form gas, thereby expanding the airbag 76 so that the second inclined hole 74 on the baffle plate 73 is aligned with the first inclined hole 72 to dissipate heat for the wind turbine 3. When the ambient temperature is lower than 20°C, the ether inside the evaporation chamber 75 is heated and cooled to liquid, thereby contracting the airbag 76 so that the second inclined hole 74 is misaligned with the first inclined hole 72 to keep the wind turbine 3 warm and avoid heat loss, so as to make full use of the heat to de-ice the blades 4.

[0044] In this embodiment, the positional relationship between the second inclined hole 74 and the first inclined hole 72 is adjusted according to the ambient temperature. When the ambient temperature is high, the second inclined hole 74 is aligned with the first inclined hole 72 to dissipate heat for the wind turbine 3. When the ambient temperature is low, the second inclined hole 74 is offset from the first inclined hole 72 to keep the wind turbine 3 warm and avoid heat loss, so as to make full use of the heat to de-ice the blades 4.

[0045] A wind turbine blade deicing method is applied to the above-mentioned wind turbine blade deicing device, and the steps are as follows: S1. The heat generated by the wind turbine 3 during operation is absorbed by the first heat-conducting tube 51. During normal operation, the winding temperature of the wind turbine 3 is usually around 90°C-130°C. The heat of the wind turbine 3 is transferred to the water inside the circulating heat pipe 53 through the first heat-conducting tube 51 and the second heat-conducting tube 52. The circulating heat pipe 53 is used to heat the blades 4, thereby heating the ice layer on the surface of the blades 4.

[0046] S2. During the rotation of the blade 4, the tooth plate 57 moves back and forth along the guide rod and drives the gear cylinder 56 to rotate, so that the follower ball 511 slides along the wave slide 58 to make the pull-out rod 510 reciprocate. The limit block 512 prevents the pull-out rod 510 from rotating with the gear cylinder 56. The pull-out rod 510 uses the piston 59 to pump and release water, so that the water inside the circulating heat pipe 53 flows clockwise to prevent uneven water temperature inside the circulating heat pipe 53.

[0047] S3. During the reciprocating motion of the pulling rod 510, the pulling rod 510 hits the cavity inside the blade 4, and utilizes the multiple reflection surfaces inside the cavity to make the sound waves reflect multiple times in the cavity, thereby increasing the interaction between the sound waves and the cavity wall, so that the vibration energy is better distributed and accumulated in the cavity, thereby improving the vibration effect. When the surface temperature of the blade 4 rises to a certain temperature, the adhesion of the ice is reduced, and vibration is utilized to improve the de-icing effect.

[0048] S4. The external temperature is transferred to the bimetallic thermometer 65 through the heat-conducting column 64. When the ambient temperature is low, the bimetallic thermometer 65 contracts so that the wedge block 63 is retracted into the avoidance groove 62, and the tooth plate 57 moves normally. When the ambient temperature is high, the bimetallic thermometer 65 expands so that the wedge block 63 extends out from the avoidance groove 62. The wedge block 63 cooperates with the clamping plate 61 to position the tooth plate 57. When the ambient temperature is high, the operation of the deicing component 5 is stopped to reduce vibration.

[0049] S5. When the ambient temperature is higher than 20°C, the ether inside the evaporation chamber 75 is heated to form gas, which expands the airbag 76, so that the second inclined hole 74 is aligned with the first inclined hole 72 to dissipate heat for the wind turbine 3. When the ambient temperature is lower than 20°C, the ether inside the evaporation chamber 75 is heated to cool into liquid, thereby shrinking the airbag 76, so that the second inclined hole 74 is misaligned with the first inclined hole 72 to keep the wind turbine 3 warm.

[0050] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A wind turbine blade deicing device, comprising a tower (1), a nacelle (2) fixedly mounted on the top of the tower (1), a wind turbine generator (3) fixedly mounted inside the nacelle (2), a blade (4) connected to an output shaft at the end of the wind turbine generator (3), characterized in that: A deicing assembly (5), comprising a circulating heat pipe (53), the end of the circulating heat pipe (53) being provided with a heat conduction assembly in contact with the wind turbine (3), the circulating heat pipe (53) being fixedly mounted inside a blade (4), a water flow extraction pipe (54) being fixedly mounted in the middle of the circulating heat pipe (53), one-way valves (55) being fixedly mounted at the inlet and outlet positions of the water flow extraction pipe (54), a piston (59) being slidably connected inside the water flow extraction pipe (54), a extraction rod (510) being fixedly mounted on the side of the piston (59), and a water pumping member being arranged on the side of the extraction rod (510); A cavity with a built-in reflective surface is provided inside the blade (4) and at the extension line of the end of the pull-out rod (510); A locking component (6) is provided inside the blade (4), and a heat retaining component (7) is provided inside the nacelle (2).

2. A wind turbine blade deicing device according to claim 1, characterized in that: A guide rod is fixedly mounted inside the blade (4), a tooth plate (57) is slidably connected to the guide rod, and the side of the tooth plate (57) is meshed with the water pumping member. When the piston (59) slides inside the water flow pumping tube (54), it is always located on the right side of the water outlet of the water flow pumping tube (54), and the water inside the circulating heat pipe (53) flows in a clockwise direction.

3. A wind turbine blade deicing device according to claim 2, characterized in that: The water pumping member comprises a gear cylinder (56), the inner arc surface of the gear cylinder (56) is provided with a wave slideway (58), a follower ball (511) is fixedly mounted on the end of the pull-out rod (510), the follower ball (511) slides in the wave slideway (58), a directional limit block (512) is fixedly mounted on the rod body of the pull-out rod (510), the limit block (512) is slidably connected to the water flow pull-out tube (54), and the tooth plate (57) is meshedly connected to the gear cylinder (56) via teeth.

4. A wind turbine blade deicing device according to claim 3, characterized in that: The heat-conducting assembly comprises a first heat-conducting tube (51), the first heat-conducting tube (51) being fixedly mounted inside the nacelle (2), the inner wall of the first heat-conducting tube (51) being fixedly connected to the wind turbine (3), the inner wall of the first heat-conducting tube (51) being rotatably connected to a second heat-conducting tube (52), and the side of the second heat-conducting tube (52) being fixedly connected to a circulating heat pipe (53).

5. A wind turbine blade deicing device according to claim 4, characterized in that: The locking assembly (6) comprises a plurality of bimetallic thermometers (65), two bimetallic thermometers (65) are fixedly mounted inside each blade (4), a heat-conducting column (64) extending to the outside of the blade (4) is fixedly mounted at the center of the bimetallic thermometer (65), a wedge block (63) is slidably connected inside the blade (4), a lifting member is provided between the wedge block (63) and the bimetallic thermometer (65), and a clamping plate (61) is fixedly mounted at the end of the tooth plate (57), and the clamping plate (61) is clamped with the wedge block (63).

6. A wind turbine blade deicing device according to claim 5, characterized in that: The lifting member comprises an avoidance groove (62), the avoidance groove (62) being opened inside the blade (4) and perpendicular to the tooth plate (57), the avoidance groove (62) being slidably connected to an avoidance spring (69), the avoidance spring (69) being fixedly mounted on the bottom of the wedge block (63), the bottom of the avoidance spring (69) being fixedly mounted with a lifting block (68), a guiding telescopic rod being fixedly mounted between the bottom of the lifting block (68) and the blade (4), and the elastic force of the bimetallic thermometer (65) being stronger than the elastic force of the avoidance spring (69).

7. A wind turbine blade deicing device according to claim 6, characterized in that: An extension piece (66) is fixedly mounted on the end of the bimetallic thermometer (65), and a roller (67) is rotatably connected to the end of the extension piece (66). The roller (67) is embedded in the bottom of the lifting block (68) and slides on the bottom of the lifting block (68).

8. A wind turbine blade deicing device according to claim 7, characterized in that: The heat retaining component (7) comprises a heat dissipation cavity (71), the heat dissipation cavity (71) being opened inside the nacelle (2) and located at the right end of the wind turbine (3), a plurality of first inclined holes (72) being opened at the right end of the nacelle (2), the first inclined holes (72) being arranged at an angle, a shielding plate (73) being connected to the inside of the nacelle (2) in an upward and downward sliding manner, a plurality of second inclined holes (74) being opened on the shielding plate (73), and the shielding plate (73) being aligned with the second inclined holes (74).

9. A wind turbine blade deicing device according to claim 8, characterized in that: An evaporation chamber (75) filled with ether is fixedly installed at the bottom of the cabin (2), and an air bag (76) is fixedly installed inside the cabin (2) and below the baffle plate (73), and the evaporation chamber (75) is in communication with the air bag (76).

10. A wind turbine blade deicing method, applied to a wind turbine blade deicing device according to claim 9, characterized in that: The steps are as follows: S1. The heat generated by the wind turbine (3) during operation is absorbed by the first heat-conducting tube (51). During normal operation, the winding temperature of the wind turbine (3) is usually between 90° C. and 130° C. The heat of the wind turbine (3) is transferred to the water inside the circulating heat pipe (53) through the first heat-conducting tube (51) and the second heat-conducting tube (52). The blades (4) are heated by the circulating heat pipe (53), thereby heating the ice layer on the surface of the blades (4); S2. During the rotation of the blade (4), the tooth plate (57) moves back and forth along the guide rod and drives the tooth cylinder (56) to rotate, so that the follower ball (511) slides along the wave slideway (58) to make the pull rod (510) reciprocate, and the limit block (512) prevents the pull rod (510) from rotating along the tooth cylinder (56). The pull rod (510) uses the piston (59) to pump and release water, so that the water inside the circulating heat pipe (53) flows clockwise, thereby preventing the water temperature inside the circulating heat pipe (53) from being uneven; S3. During the reciprocating motion of the pull-out rod (510), the pull-out rod (510) strikes the cavity inside the blade (4), and utilizes the multiple reflection surfaces inside the cavity to promote multiple reflections of the sound wave in the cavity, thereby increasing the interaction between the sound wave and the cavity wall, thereby better distributing and accumulating the vibration energy in the cavity, improving the vibration effect, and when the surface temperature of the blade (4) rises to a certain temperature, the adhesion of the ice is reduced, and the de-icing effect is improved by utilizing vibration; S4. The external temperature is transferred to the bimetallic thermometer (65) through the heat-conducting column (64). When the ambient temperature is low, the bimetallic thermometer (65) contracts so that the wedge block (63) is retracted into the avoidance groove (62), and the tooth plate (57) moves normally. When the ambient temperature is high, the bimetallic thermometer (65) expands so that the wedge block (63) extends out from the avoidance groove (62), and the wedge block (63) cooperates with the clamping plate (61) to position the tooth plate (57). When the ambient temperature is high, the operation of the deicing assembly (5) is stopped to reduce vibration; S5. When the ambient temperature is higher than 20°C, the ether in the evaporation chamber (75) is heated to form gas, thereby expanding the airbag (76) so that the second inclined hole (74) on the shielding plate (73) is aligned with the first inclined hole (72) to dissipate heat from the wind turbine (3). When the ambient temperature is lower than 20°C, the ether in the evaporation chamber (75) is heated to cool to liquid, thereby contracting the airbag (76) so that the second inclined hole (74) is misaligned with the first inclined hole (72) to keep the wind turbine (3) warm and avoid heat loss, so that the heat can be fully utilized to de-ice the blades (4).

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