Blade deicing device for wind driven generator

Abstract

The invention provides a blade deicing device for a wind driven generator, and mainly relates to the technical field of wind driven generator fan blade maintenance equipment. A blade deicing device for a wind driven generator comprises a connecting base, a fan blade is fixedly installed at one end of the connecting base and is of a hollow structure, a heating pipe is fixedly installed in the fan blade, a supporting plate is fixedly installed on the side, close to the connecting base, of the inner wall of the fan blade, and a compression air pump is fixedly installed on one side of the supporting plate; and an exhaust port of the compression air pump is fixedly communicated with the air inlet end of the heating pipe through a connecting pipe. The deicing device has the beneficial effects that when the deicing device is used, through the synergistic effect of the heating pipe and the compression air pump, cyclic heating and efficient heat exchange of air in the fan blades are achieved, the surface temperature of the fan blades is increased by adopting the mode of heating the interior of the fan blades, and the deicing effect can be efficiently and stably achieved.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of maintenance equipment for wind turbine blades, and specifically, it is an ice removal device for wind turbine blades. Background Art

[0002] With the continuous growth of global energy demand and the urgent need for clean energy, wind power generation, as a renewable and pollution-free energy utilization method, has received extensive attention and application. However, when wind turbines operate in harsh environments such as low temperature and high humidity, ice is likely to form on the surface of their blades. This not only significantly increases the weight and wind resistance of the blades, resulting in a substantial decline in the power generation efficiency of the wind turbines, but also may cause serious safety hazards such as blade vibration, imbalance, and even fracture, posing a serious threat to the stable operation and safety of the power generation equipment.

[0003] The invention patent with the publication number CN117006004A discloses an automatic snow and ice cleaning device for wind turbine blades, which includes a compressed air source, a Venturi tube, and a spray head. The Venturi tube includes an inlet section, a contraction section, and a diffusion section. The compressed air source is connected to the inlet section of the Venturi tube through an exhaust pipe. The contraction section of the Venturi tube is connected to an ice removal liquid tank through a suction pipe. The diffusion section of the Venturi tube is connected to the spray head through a second ice removal pipe, and the spray head is located on the surface of the blade; a three-way valve is arranged inside the exhaust pipe, and another outlet of the three-way valve is connected to the spray head through a first ice removal pipe. The present invention can achieve automatic ice removal and snow removal of wind turbine blades.

[0004] The existing ice removal devices perform ice removal operations by spraying ice removal liquid. However, the ice removal liquid will be continuously consumed during use, requiring frequent maintenance, which is not convenient for long-term use. Moreover, a part of the chemical agent will remain on the surface of the blade after the ice is melted, which is likely to cause corrosion of the blade and affect the service life of the blade. Summary of the Invention

[0005] To solve the deficiencies of the existing technology, the present invention provides an ice removal device for wind turbine blades, which is achieved through the following technical solutions: An ice removal device for wind turbine blades includes a connection seat. One end of the connection seat is fixedly installed with a blade, and the blade is of a hollow structure. A heating pipe is fixedly installed inside the blade. A support plate is fixedly installed on one side of the inner wall of the blade close to the connection seat, and a compressed air pump is fixedly installed on one side of the support plate. The exhaust port of the compressed air pump is fixedly communicated with the intake end of the heating pipe through a connecting pipe. Furthermore, a number of evenly distributed electric heating wires are fixedly installed inside the heating pipe, and a number of evenly distributed flow guide covers are fixedly installed outside the heating pipe. The diameter of the flow guide cover gradually decreases axially from the air inlet end to the exhaust end of the heating pipe.

[0006] Furthermore, a flow guide block is fixedly installed on one side of the heating pipe near the air inlet end. A number of evenly distributed spiral through grooves are formed on the outer periphery of the flow guide block, and a pressure relief pipe is disposed through the center of the flow guide block. One end of the pressure relief pipe vertically penetrates and is fixedly connected to the bottom of the heating pipe. One end of the pressure relief pipe located in the heating pipe faces the exhaust end of the heating pipe. A baffle is fixedly installed on the inner wall of the fan blade near the exhaust end inside the heating pipe through a bracket. The baffle is of a conical structure, and the end with a smaller cross section of the baffle is inserted into the heating pipe.

[0007] Furthermore, an anti-icing coating is applied to the surface of the fan blade.

[0008] Furthermore, a temperature sensor and a controller are provided inside the connection seat. The temperature sensor is used to monitor the temperature inside the fan blade in real time. The controller is electrically connected to the electric heating wire and the compressed air pump, and is used to automatically adjust the heating power of the electric heating wire and the exhaust volume of the compressed air pump according to the feedback signal of the temperature sensor.

[0009] Furthermore, a number of evenly distributed heat dissipation fins are provided on the surface of the flow guide cover.

[0010] Furthermore, a conductive slip ring is included. The conductive slip ring is disposed at the connection interface between the fan blade and the main shaft of the wind turbine. The stator part of the conductive slip ring is rigidly connected to the fixed end of the connection seat, and the rotor part is coaxially fixed to the rotating shaft of the fan blade to ensure continuous transmission of electric energy during the rotation of the fan blade.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the synergistic effect of the heating pipe and the compressed air pump, the device realizes the circulating heating and efficient heat exchange of the air inside the fan blade. The electric heating wire inside the heating pipe directly heats the air. At the same time, the design of the flow guide cover and the heat dissipation fins optimizes the hot air flow path, enabling it to evenly cover the inner surface of the fan blade and significantly improving the heat exchange efficiency. In addition, the hydrophobic anti-icing coating applied to the surface of the fan blade further reduces the ice adhesion force, forming a double protection together with the internal heating system. This design combining de-icing and anti-icing not only effectively melts the formed ice layer, but also suppresses the icing phenomenon from the source by maintaining the temperature of the fan blade surface above the freezing point, ensuring the continuous and stable operation of the wind turbine in a low-temperature environment and significantly reducing the shutdown risk and maintenance cost caused by icing. Description of the Drawings

[0012] Figure 1It is a schematic structural diagram of the present invention; Figure 2 It is the front view of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the fan blade of the present invention; Figure 4 It is Figure 3 the enlarged view of part Ⅰ of Figure 5 It is Figure 3 the enlarged view of part Ⅱ of

[0013] Reference numerals shown in the drawings: 10, connecting seat; 101, fan blade; 20, heating pipe; 201, electric heating wire; 202, flow guide cover; 30, support plate; 301, compressed air pump; 302, connecting pipe; 40, flow guide block; 401, spiral through groove; 402, pressure relief pipe; 403, stop block; 50, temperature sensor; 60, controller. Detailed implementation manners

[0014] In combination with the drawings and specific embodiments, the present invention will be further described. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0015] Embodiment: An ice removing device for blades of a wind turbine As Figures 1-5 shown, an ice removing device for blades of a wind turbine, its specific structure includes: Connecting seat 10, one end of the connecting seat 10 is fixedly installed with a fan blade 101, and the fan blade 101 is a hollow structure. A heating pipe 20 is fixedly installed inside the fan blade 101. The heating pipe 20 is arranged along the axial direction of the fan blade 101. One side of the inner wall of the fan blade 101 close to the connecting seat 10 is fixedly installed with a support plate 30. One side of the support plate 30 is fixedly installed with a compressed air pump 301. The exhaust port of the compressed air pump 301 is fixedly communicated with the intake end of the heating pipe 20 through a connecting pipe 302. The left side of the heating pipe 20 is the intake end, and its right side is the exhaust end. The above working principle: When this device is in use, the air inside the fan blade 101 is heated through the heating pipe 20, and the air in the fan blade 101 is continuously extracted by the compression air pump 301 and injected into the heating pipe 20 for circulating heating. The hot air discharged from the heating pipe 20 can exchange heat with the fan blade 101 after contacting the inside of the fan blade 101, increasing the surface temperature of the fan blade 101, melting the ice on the surface of the fan blade 101, achieving de-icing of the fan blade 101. Moreover, by maintaining the temperature of the fan blade 101 surface above zero degrees, it can also prevent the fan blade 101 from icing, ensuring the normal operation of the wind turbine in a low-temperature environment and improving the power generation efficiency and equipment reliability.

[0016] A number of uniformly distributed electric heating wires 201 are fixedly installed inside the heating pipe 20. A number of uniformly distributed flow guide covers 202 are fixedly installed outside the heating pipe 20. The diameter of the flow guide cover 202 gradually decreases axially from the air inlet end to the exhaust end of the heating pipe 20. The electric heating wire 201 is energized to generate heat, heating the air inside the heating pipe 20. And through the heat dissipation effect of the heating pipe 20, the temperature of the air inside the fan blade 101 can also be increased. The flow guide cover 202 can guide the flow direction of the hot air, enabling the hot air to continuously contact the inner surface of the fan blade 101 during the flow process, further improving the heat exchange efficiency between the fan blade 101 and the hot air, enhancing the heating effect, and thus more effectively de-icing the fan blade 101.

[0017] A flow guide block 40 is fixedly installed on one side of the heating pipe 20 close to the air inlet end. A number of uniformly distributed spiral through grooves 401 are formed on the outer periphery of the flow guide block 40. And a pressure relief pipe 402 is arranged through the center of the flow guide block 40. One end of the pressure relief pipe 402 vertically penetrates and is fixedly connected to the bottom of the heating pipe 20. The end of the pressure relief pipe 402 located inside the heating pipe 20 faces the exhaust end of the heating pipe 20. A stop block 403 is fixedly installed on one side of the inner wall of the fan blade 101 close to the exhaust end inside the heating pipe 20 through a bracket. The stop block 403 is of a conical structure, and the end with a smaller cross-section of the stop block 403 is inserted into the heating pipe 20. The air in the fan blade 101 is input into the heating pipe 20 through the compression air pump 301. After flowing through the spiral through grooves 401 outside the flow guide block 40, the air continues to flow to the right in a spiral shape, enabling the air to more fully contact the electric heating wire 201 inside the heating pipe 20, improving the heating efficiency of the air. The pressure relief pipe 402 can relieve pressure when the pressure inside the heating pipe 20 is too high, ensuring the safe operation of the device. The hot air inside the heating pipe 20 is guided by the stop block 403 and blown towards the fan blade 101. And due to the blocking effect of the stop block 403, the pressure at one end close to the stop block 403 increases, causing a part of the hot air to flow reversely and be discharged through the pressure relief pipe 402, which can increase the temperature of the air on one side of the compression air pump 301, enabling the air inhaled into the heating pipe 20 to maintain a relatively high temperature and improving the temperature increase effect of the air inside the heating pipe 20.

[0018] The surface of the fan blade 101 is coated with an anti-icing coating. The anti-icing coating is made of a hydrophobic polymer material and has a thickness of 0.1 - 0.5 mm, which is used to reduce the adhesion of ice layers on the surface of the fan blade. In cooperation with the de-icing effect of the heating pipe 20, it further reduces the risk of ice formation on the fan blade.

[0019] The connecting seat 10 is internally provided with a temperature sensor 50 and a controller 60. The temperature sensor 50 is used to monitor the temperature inside the fan blade 101 in real time. The controller 60 is electrically connected to the electric heating wire 201 and the compressed air pump 301, and is used to automatically adjust the heating power of the electric heating wire 201 and the exhaust volume of the compressed air pump 301 according to the feedback signal of the temperature sensor 50.

[0020] The surface of the flow guide cover 202 is provided with a number of evenly distributed heat dissipation fins. The heat dissipation fins extend along the axial direction of the heating pipe 20, which is used to increase the heat dissipation area of the heating pipe 20, improve the heat conduction efficiency, and guide the hot air to be evenly distributed along the axial direction of the fan blade 101, improve the distribution effect of the hot air, and increase the heating effect on the fan blade 101.

[0021] It further includes a conductive slip ring. The conductive slip ring is arranged at the connection interface between the fan blade 101 and the main shaft of the wind turbine. The stator part of the conductive slip ring is rigidly connected to the fixed end of the connecting seat 10, and the rotor part is coaxially fixed to the rotating shaft of the fan blade 101, ensuring continuous transmission of electric energy during the rotation of the fan blade 101.

[0022] In the present solution, the position of the controller is set by the staff according to the actual situation during operation. The controller is used to control all the electrical appliances in the present solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication devices, lights, speakers, and microphones. The controller is an Intel processor, AMD processor, PLC controller, ARM processor, or single-chip microcomputer. The accessories used in conjunction with it also include a main board, a memory module, a storage medium, and a power supply. The power supply is mains power or a lithium battery. When there is a display screen, a display card is also provided. For the operating principle of the controller, please refer to "Principles of Automatic Control", "Principles and Application Simulation Cases of Microcontrollers", and "Principles and Applications of Sensors" published by Tsinghua University Press. Other books in this field can also be referred to for reading. Other automated controls and electrical appliances not mentioned are all well-known knowledge to those skilled in the art and will not be elaborated here.

[0023] In the explanation of the present invention, it should be noted that the terms indicating directions are only for the convenience of description and understanding, and do not uniquely limit the installation positions of specific technical features, and other installable ways that can be realized are not excluded.

[0024] The serial numbers assigned to components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. For the terms "connected" and "coupled" used in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 thus should not be construed as a limitation to the present invention.

[0025] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blade de-icing device for a wind turbine, comprising a connecting seat (10), one end of the connecting seat (10) is fixedly installed with a fan blade (101), and the fan blade (101) is of a hollow structure, characterized in that: A heating tube (20) is fixedly installed inside the fan blade (101). One side of the inner wall of the fan blade (101) close to the connecting seat (10) is fixedly installed with a support plate (30). A compression air pump (301) is fixedly installed on one side of the support plate (30). The exhaust port of the compression air pump (301) is fixedly communicated with the intake end of the heating tube (20) through a connecting pipe (302).

2. The blade de-icing device for a wind turbine according to claim 1, wherein: A number of uniformly distributed electric heating wires (201) are fixedly installed inside the heating tube (20). A number of uniformly distributed flow guide covers (202) are fixedly installed outside the heating tube (20). The diameter of the flow guide cover (202) gradually decreases along the axial direction from the intake end to the exhaust end of the heating tube (20).

3. The blade de-icing device for a wind turbine according to claim 2, characterized in that: A flow guide block (40) is fixedly installed on one side of the heating tube (20) close to the intake end. A number of uniformly distributed spiral through grooves (401) are formed on the outer circumference of the flow guide block (40). A pressure relief pipe (402) is disposed through the center of the flow guide block (40). One end of the pressure relief pipe (402) vertically penetrates and is fixedly connected to the bottom of the heating tube (20). The end of the pressure relief pipe (402) located inside the heating tube (20) faces the exhaust end of the heating tube (20). A stop block (403) is fixedly installed on one side of the inner wall of the fan blade (101) close to the exhaust end inside the heating tube (20) through a bracket. The stop block (403) is of a conical structure, and the end with a smaller cross section of the stop block (403) is inserted into the heating tube (20).

4. The blade de-icing device for a wind turbine according to claim 1, characterized in that: The surface of the fan blade (101) is coated with an anti-icing coating.

5. The blade de-icing device for a wind turbine according to claim 3, characterized in that: A temperature sensor (50) and a controller (60) are provided inside the connecting seat (10). The temperature sensor (50) is used to monitor the temperature inside the fan blade (101) in real time. The controller (60) is electrically connected to the electric heating wire (201) and the compression air pump (301), and is used to automatically adjust the heating power of the electric heating wire (201) and the exhaust volume of the compression air pump (301) according to the feedback signal of the temperature sensor (50).

6. The blade de-icing device for a wind turbine according to claim 5, characterized in that: A number of uniformly distributed heat dissipation fins are provided on the surface of the flow guide cover (202).

7. The blade de-icing device for a wind turbine according to claim 6, characterized in that: It further includes a conductive slip ring. The conductive slip ring is disposed at the connection interface between the fan blade (101) and the main shaft of the wind turbine. The stator part of the conductive slip ring is rigidly connected to the fixed end of the connecting seat (10), and the rotor part is coaxially fixed with the rotating shaft of the fan blade (101) to ensure continuous transmission of electric energy during the rotation of the fan blade (101).

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