Gas-heat deicing device of wind turbine generator

Abstract

The utility model discloses a wind turbine generator set gas-heat deicing device, which relates to the technical field of wind turbine generator set deicing, and comprises a heater I, the heater I is arranged at the root of a blade to enable heat to be transmitted from the root of the blade, and a heater II is arranged at the middle section of the blade to supplement insufficient energy of the heater I at the root. A third heater is installed at the tip of the blade and directly provides heat for the tip of the blade, and an airflow conveying mechanism is installed at the root of the blade. The first heater provides heat transfer in the whole blade, the second heater supplements insufficient energy of the first heater at the root, it is ensured that enough heat input can be obtained in the middle of the blade, the third heater directly provides heat for the tip end of the blade, heat loss caused by the too long distance is avoided, and the air flow generated by the fan is combined. The air flow is conveyed outwards through a plurality of air outlets in the hollow pipe, so that the interior of the blade is deiced through air heat.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine de-icing technology, and in particular to a wind turbine gas-heat de-icing device. Background Technology

[0002] In cold climates, wind turbine blades are susceptible to icing, which can not only reduce power generation efficiency but also cause serious damage to the equipment.

[0003] Traditional heating systems typically install a single heater at the blade root, making it difficult to effectively transfer heat to the middle and tip of the blade. This is especially true for large blades, where a single heating source often cannot provide enough heat to cover the entire blade surface. Due to the long and uneven heat transfer path, some areas may experience localized overheating, while other areas may suffer from insufficient heat. This not only affects the de-icing effect but may also lead to unnecessary energy waste. Utility Model Content

[0004] The purpose of this utility model is to provide a wind turbine air-heat de-icing device that can avoid the situation where some areas may experience local overheating due to the long and uneven heat transfer path, while other areas may experience insufficient heat, which not only affects the de-icing effect but may also lead to unnecessary energy waste.

[0005] This utility model provides a wind turbine air-heat de-icing device, including a heater one, which is installed at the root of the blade to transfer heat from the root of the blade. A heater two is installed in the middle section of the blade to supplement the insufficient energy of the root heater one. A heater three is installed at the tip of the blade to directly provide heat to the tip of the blade. An airflow conveying mechanism is installed at the root of the blade. The airflow conveying mechanism promotes the flow of hot air in the blade by rotation, so that the heat can be evenly distributed inside the blade.

[0006] Preferably, the airflow conveying mechanism includes a fixing plate fixed to the root of the blade, a sealing cover installed at the lower end of the fixing plate, a fan installed inside the sealing cover, an air duct connected to the lower end of the sealing cover, a hollow tube rotatably installed inside the air outlet of the air duct, and multiple air outlet pipes installed on the hollow tube.

[0007] Preferably, the upper end of the sealing cover has a plurality of mesh holes.

[0008] Preferably, an outer plate is fixedly installed at the lower end of the air duct, a drive wheel is rotatably installed on the outer plate, a gear ring is fixedly connected to the outside of the hollow tube, the gear ring meshes with the drive wheel, and the drive wheel is driven by a motor.

[0009] Preferably, the upper end of the hollow tube is connected to an annular tube, and multiple sets of curved tubes are distributed on the outer side of the annular tube, with the curved tubes corresponding to the corners inside the blade.

[0010] Preferably, the upper end of the hollow tube is provided with a rotating ring, which is rotatably connected to a rotating groove opened on the inner wall of the air outlet of the air duct.

[0011] Preferably, a fixing sleeve is fixedly provided at the root of the blade, and several elastic elements are provided on the inner walls of both sides of the fixing sleeve. One side of the elastic element is connected to the arc plate, and the arc plate is located on one side of the sealing cover.

[0012] Preferably, several temperature sensors are installed inside the blade.

[0013] Preferably, the inner wall of the blade is coated with a graphene coating.

[0014] Preferably, a metal heat-conducting mesh is installed on the inner wall of the blade.

[0015] This utility model provides a wind turbine air-heat de-icing device, which, compared with the prior art, offers the following advantages:

[0016] 1. This utility model provides heat transfer throughout the entire blade through heater one, heater two supplements the insufficient energy of heater one at the root to ensure that the middle part of the blade can also obtain sufficient heat input, and heater three directly provides heat to the blade tip to avoid heat loss due to excessive distance. Combined with the airflow generated by the fan, the airflow is transported outward through multiple air outlets on the hollow tube, so that the blade interior is de-iced by air heat. Heat-conducting mesh and heat-conducting coating are installed inside the blade to enhance the de-icing effect.

[0017] 2. This utility model uses the meshing of the gear ring and the drive wheel to rotate the hollow tube, thereby enhancing the uniformity of airflow output and making the hot airflow distribution more uniform. At the same time, combined with the blowing of the curved tube on the blade edge, it enhances the thermal conductivity of the leading and trailing edge areas of the blade. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a top view schematic diagram of the blade structure according to an embodiment of the present utility model;

[0021] Figure 3 This is an embodiment of the present utility model. Figure 2Schematic diagram of the structure along section AA;

[0022] Figure 4 This is a top view of the internal structure of the blade in an embodiment of the present invention;

[0023] Figure 5 This is a top view of the fixing plate structure according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram showing the disassembled structure of the airflow conveying mechanism according to an embodiment of the present utility model;

[0025] Figure 7 This is an embodiment of the present utility model. Figure 6 A schematic diagram of the structure at point A;

[0026] Figure 8 This is a cross-sectional schematic diagram of the hollow tube structure according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Blade; 2. Heat-conducting mesh; 3. Temperature sensor; 4. Heater 1; 5. Heater 2; 6. Heater 3; 7. Fixing plate; 8. Fixing sleeve; 9. Arc plate; 10. Elastic element; 11. Sealing cover; 12. Fan; 13. Air duct; 14. Outer plate; 15. Hollow tube; 16. Air outlet duct; 17. Annular tube; 18. Bend; 19. Gear ring; 20. Drive wheel. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1-8 This utility model embodiment provides a wind turbine air-heat de-icing device, including a heater 4, which is installed at the root of the blade 1 to transfer heat from the root of the blade 1, ensuring uniform heat distribution from the root. A heater 5 is installed in the middle section of the blade 1 to supplement the insufficient energy of the root heater 4, ensuring that the middle of the blade 1 can also obtain sufficient heat input, thereby improving the overall heating uniformity. A heater 6 is installed at the tip of the blade 1 to directly provide heat to the tip of the blade 1, avoiding heat loss due to excessive distance. Heaters 4, 5, and 6 are all PTC heaters.

[0031] An airflow conveying mechanism is installed at the root of blade 1. The airflow conveying mechanism promotes the flow of hot air in blade 1 by rotating, so that the heat can be evenly distributed inside blade 1.

[0032] Specifically, the airflow delivery mechanism includes a fixed plate 7 fixed to the root of the blade 1, a sealing cover 11 installed at the lower end of the fixed plate 7, a fan 12 installed inside the sealing cover 11, and an air duct 13 connected to the lower end of the sealing cover 11. The air duct 13 and the sealing cover 11 seal the fan 12. A hollow tube 15 is rotatably installed inside the air outlet of the air duct 13, and multiple air outlet pipes 16 are installed on the hollow tube 15. The fan 12 generates directional airflow by rotating, and the airflow is blown through the multiple air outlet pipes 16, so that the airflow is blown to various parts inside the blade 1, such as the leading edge, trailing edge, and key parts such as the middle and tip of the blade 1.

[0033] Several mesh holes are provided at the upper end of the sealing cover 11. The mesh holes can block dust and prevent dust from entering the fan 12.

[0034] Furthermore, an outer plate 14 is fixedly installed at the lower end of the air duct 13, and a drive wheel 20 is rotatably installed on the outer plate 14. A gear ring 19 is fixedly connected to the outside of the hollow tube 15. The gear ring 19 meshes with the drive wheel 20. The drive wheel 20 is driven by a motor, which makes the gear ring 19 rotate with the hollow tube 15, thereby making the airflow distribution more uniform. The airflow blows the heat generated by heater 4, heater 5 and heater 6, thereby de-icing by gas heating.

[0035] In addition, a rotating ring is provided at the upper end of the hollow tube 15. The rotating ring is rotatably connected to the rotating groove opened on the inner wall of the air outlet of the air duct 13, which improves the stability of the hollow tube 15.

[0036] Several temperature sensors 3 are installed inside the blade 1 to monitor the temperature inside the blade 1 in real time, so as to perform de-icing more accurately.

[0037] The inner wall of blade 1 is coated with a graphene coating, and a metal heat-conducting mesh 2 is installed on the inner wall of blade 1 to improve the heat transfer efficiency from the inside to the outside surface, ensuring that the entire surface of blade 1 can be effectively heated.

[0038] Furthermore, an annular tube 17 is connected to the upper end of the hollow tube 15. Multiple sets of bent tubes 18 are distributed on the outer side of the annular tube 17. The bent tubes 18 correspond to the corners inside the blade 1, and the de-icing effect at the corners inside the blade 1 is enhanced by the bent tubes 18.

[0039] It is worth noting that a fixing sleeve 8 is fixedly installed at the root of blade 1. Several elastic elements 10 are provided on the inner walls of both sides of the fixing sleeve 8. One side of the elastic element 10 is connected to the arc plate 9, which is located on one side of the sealing cover 11. The fan 12 is protected by the shock absorption effect of the elastic element 10, and the service life of the fan 12 is extended. The elastic element 10 can be made of damping or other materials.

[0040] In summary, the working principle of the wind turbine air-heat de-icing device of this utility model embodiment is as follows: The heater 4 installed at the root of the blade 1 is activated to provide initial heat, ensuring uniform heat distribution from the root; the heater 5 in the middle section and the heater 6 at the tip supplement energy, ensuring sufficient heat is obtained in the middle and tip sections respectively. The fan 12 generates directional airflow through rotation, and blows hot air evenly to various key parts inside the blade 1 via the hollow tube 15 and its multiple outlet pipes 16. The gear ring 19 meshes with the drive wheel 20, causing the hollow tube 15 to rotate, further enhancing the uniformity of airflow distribution. The curved pipe 18 on the annular tube 17 is specifically designed to enhance airflow at the corners.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wind turbine air-heat de-icing device, comprising a heater (4), characterized in that: The heater 1 (4) is installed at the root of the blade (1) so that heat is transferred from the root of the blade (1). The middle section of the blade (1) is equipped with heater 2 (5) to supplement the insufficient energy of the root heater 1 (4). The tip of the blade (1) is equipped with heater 3 (6) to directly provide heat to the tip of the blade (1). The root of the blade (1) is equipped with an airflow conveying mechanism. The airflow conveying mechanism promotes the flow of hot air in the blade (1) by rotating, so that the heat can be evenly distributed inside the blade (1).

2. The wind turbine air-heat de-icing device according to claim 1, characterized in that: The airflow conveying mechanism includes a fixed plate (7) fixed at the root of the blade (1), a sealing cover (11) installed at the lower end of the fixed plate (7), a fan (12) installed inside the sealing cover (11), an air duct (13) connected to the lower end of the sealing cover (11), a hollow tube (15) rotatably installed inside the air outlet of the air duct (13), and multiple air outlet pipes (16) installed on the hollow tube (15).

3. The wind turbine air-heat de-icing device according to claim 2, characterized in that: The upper end of the sealing cover (11) is provided with several mesh holes.

4. The wind turbine air-heat de-icing device according to claim 3, characterized in that: The lower end of the air hood (13) is fixedly provided with an outer plate (14), and an active wheel (20) is rotatably provided on the outer plate (14). A gear ring (19) is fixedly connected to the outside of the hollow tube (15). The gear ring (19) meshes with the active wheel (20), and the active wheel (20) is driven by a motor.

5. The wind turbine air-heat de-icing device according to claim 4, characterized in that: The upper end of the hollow tube (15) is connected to an annular tube (17), and multiple sets of curved tubes (18) are distributed on the outer side of the annular tube (17). The curved tubes (18) correspond to the corners inside the blade (1).

6. The wind turbine air-heat de-icing device according to claim 5, characterized in that: The upper end of the hollow tube (15) is provided with a rotating ring, which is rotatably connected to the rotating groove opened on the inner wall of the air outlet of the air duct (13).

7. The wind turbine air-heat de-icing device according to claim 1, characterized in that: The blade (1) is fixedly provided with a fixing sleeve (8) at the root. Several elastic elements (10) are provided on the inner walls of both sides of the fixing sleeve (8). One side of the elastic element (10) is connected to the arc plate (9), and the arc plate (9) is located on one side of the sealing cover (11).

8. The wind turbine air-heat de-icing device according to claim 7, characterized in that: Several temperature sensors (3) are installed inside the blade (1).

9. The wind turbine air-heat de-icing device according to claim 8, characterized in that: The inner wall of the blade (1) is coated with a graphene coating.

10. The wind turbine air-heat de-icing device according to claim 9, characterized in that: A metal heat-conducting mesh (2) is installed on the inner wall of the blade (1).

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