A fan blade de-icing device

Abstract

The utility model belongs to fan blade deicing field provides a kind of fan blade deicing device, including the shaft, the outer side of the shaft is provided with the three blade bodies of circumferential array, the blade body includes the blade root being arranged in the outer side of shaft, the side of the blade root away from the shaft is provided with blade face, the blade body is provided with deicing mechanism, and the deicing mechanism includes the heating assembly for ice melting and the vibration component for accelerating ice layer to fall off;The utility model is through heating assembly and vibration component cooperation, heating assembly is helped by air duct and heating wire, can realize hot airflow in the inside of blade face Uniform delivery and subsection heat supplement, avoid local ice melting not completely, simultaneously utilize the cooperation of slide rail and electric sliding block, combine the real-time ice layer detection of infrared sensor, can drive ultrasonic transducer accurate positioning thick ice area on blade body, realize pertinence strengthen vibration deicing, greatly improve the deicing effect to blade body.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine blade de-icing, specifically a wind turbine blade de-icing device. Background Technology

[0002] Wind turbines are often deployed in low-temperature and frigid regions such as high altitudes and high latitudes. The turbine blades are one of the core components of wind turbines, and ice easily adheres to their surfaces in winter. Ice can alter the aerodynamic shape of the blades, leading to a decrease in power generation efficiency, increasing blade load, causing structural fatigue, and even breakage. This seriously threatens the safe and stable operation of the wind turbine, making the de-icing of wind turbine blades both urgent and critical.

[0003] For example, Chinese patent publication number "CN221400797U" discloses "a de-icing device for wind turbine blades, including a fairing, a hub is provided inside the fairing, blades are fixedly connected to the outer wall of the hub, and a de-icing device is provided inside the blades, the de-icing device including a heating de-icing device and a vibration de-icing device. After the blades freeze in winter, the heating de-icing device inside the blades can heat the inside of the blades, so that the heat can be transferred to the surface of the blades, thereby melting the ice and achieving the de-icing effect. If the ice is frozen thickly, the ice will fall off slowly. Therefore, by vibrating the surface of the blades with the vibration de-icing device, the falling speed of the ice will be accelerated."

[0004] However, in the aforementioned patent, the ultrasonic transducer is positioned in a fixed location. In actual operation, different parts of the blade are affected by airflow and temperature, resulting in significant differences in the thickness of the ice layer on different parts of the blade. The fixed layout of the ultrasonic transducer cannot dynamically adjust its position according to the distribution of the ice layer. This not only requires the configuration of multiple transducers, resulting in cost and energy waste, but also makes it difficult to generate targeted vibrations for thick ice areas, leading to uneven de-icing efficiency and slow shedding of thick ice.

[0005] To address this issue, those skilled in the art have proposed a wind turbine blade de-icing device. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a wind turbine blade de-icing device.

[0007] A wind turbine blade de-icing device includes a rotating shaft, three blade bodies arranged in a circumferential array on the outer side of the rotating shaft, each blade body including a blade root disposed on the outer side of the rotating shaft, a blade surface disposed on the side of the blade root away from the rotating shaft, and a de-icing mechanism disposed on the blade body, the de-icing mechanism including a heating component for melting ice and a vibration component for accelerating the shedding of ice.

[0008] The vibration assembly includes a support beam disposed inside the blade surface, and slide rails are provided on both the upper and lower sides of the support beam. An electric slider is slidably disposed on the slide rails, and an ultrasonic transducer is disposed on the side of the electric slider away from the slide rails.

[0009] Preferably, the heating assembly includes a heater disposed inside the blade root, and the hot air outlet end of the heater is connected to two air guide pipes through a three-way diverter valve. Both air guide pipes pass through the inside of the blade surface and are located on the upper and lower sides of the support beam, respectively.

[0010] Preferably, the outer side of the air guide tube is fitted with a plurality of spiral heating wires, which are spaced apart along the length of the air guide tube, and both ends of the heating wires are connected to the inner side of the support beam.

[0011] Preferably, a plurality of infrared sensors arranged in a circular array are provided on the side of the leaf root near the leaf surface, with the detection end of the infrared sensors facing outward from the leaf surface.

[0012] Preferably, the vertical cross-section of the support beam is I-shaped, and a temperature sensor is provided on the upper part of the support beam.

[0013] Preferably, the outer side of the leaf surface is coated with a hydrophobic medium.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention utilizes a heating component and a vibration component working in tandem. The heating component, with the aid of an air duct and heating wire, enables uniform delivery and segmented heating of hot airflow within the blade surface, preventing incomplete localized ice melting. Simultaneously, by employing a sliding rail and an electric slider, combined with real-time ice layer detection by an infrared sensor, it drives an ultrasonic transducer to precisely locate thick ice areas on the blade body, achieving targeted and enhanced vibration de-icing and significantly improving the de-icing effect on the blade body. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the blade body in this utility model;

[0018] Figure 3 This is a cross-sectional view showing the connection between the blade root and the heater in this utility model.

[0019] Figure 4 This is a partial connection diagram of the blade surface and the de-icing mechanism in this utility model;

[0020] Figure 5 This is a structural diagram of the de-icing mechanism in this utility model;

[0021] Figure 6 This is a cross-sectional view of the de-icing mechanism in this utility model.

[0022] In the picture:

[0023] 1. Shaft; 2. Blade body; 21. Blade root; 22. Blade surface; 3. De-icing mechanism; 31. Heating assembly; 311. Heater; 312. Air guide pipe; 313. Heating wire; 32. Vibration assembly; 321. Support beam; 322. Slide rail; 323. Electric slider; 324. Ultrasonic transducer; 4. Infrared sensor; 5. Temperature sensor. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] As attached Figure 1 To be continued Figure 6 As shown:

[0026] This utility model provides a wind turbine blade de-icing device, including a rotating shaft 1, three blade bodies 2 arranged in a circular array on the outer side of the rotating shaft 1, each blade body 2 including a blade root 21 disposed on the outer side of the rotating shaft 1, a blade surface 22 disposed on the side of the blade root 21 away from the rotating shaft 1, and a de-icing mechanism 3 disposed on the blade body 2, the de-icing mechanism 3 including a heating component 31 for melting ice and a vibration component 32 for accelerating the shedding of ice.

[0027] Among them, the de-icing mechanism 3 can achieve a synergistic de-icing effect of heating to melt ice and directional vibration to remove ice, which effectively improves the de-icing effect on the blade body 2.

[0028] refer to Figure 3 and Figure 5 The heating assembly 31 includes a heater 311 disposed inside the blade root 21. The hot air outlet end of the heater 311 is connected to two air guide pipes 312 through a three-way diverter valve. Both air guide pipes 312 pass through the blade surface 22 and are located on the upper and lower sides of the support beam 321, respectively.

[0029] refer to Figure 6 Multiple spiral heating wires 313 are sleeved on the outside of the air guide tube 312. The multiple heating wires 313 are distributed at intervals along the length of the air guide tube 312, and both ends of the heating wires 313 are connected to the inner side of the support beam 321.

[0030] The temperature sensor 5 can monitor whether the outer blade body 2 is icing. When the blade body 2 is icing, the heater 311 works. The hot airflow generated by the heater is diverted by the three-way diverter valve and then delivered to the inside of the blade surface 22 through two air guide pipes 312, achieving bidirectional heating coverage of the blade surface 22. The spiral heating wires 313 distributed at intervals on the outside of the air guide pipes 312 can perform segmented supplementary heating during the transmission of the hot airflow along the air guide pipes 312. When the temperature of the hot airflow decreases due to the increase in distance, the heating wires 313 are energized and heat up, and the airflow in the air guide pipes 312 is heated again through heat conduction, ensuring that the hot airflow can always maintain an effective ice melting temperature inside the blade surface 22, greatly improving the heating uniformity of the blade surface 22, and avoiding the problem of incomplete ice melting caused by insufficient heat in some areas.

[0031] refer to Figure 5 and Figure 6 The vibration assembly 32 includes a support beam 321 disposed inside the blade 22. Slide rails 322 are provided on both the upper and lower sides of the support beam 321. An electric slider 323 is slidably disposed on the slide rails 322. An ultrasonic transducer 324 is disposed on the side of the electric slider 323 away from the slide rails 322.

[0032] refer to Figure 1 and Figure 2 Multiple infrared sensors 4 arranged in a circular array are provided on the side of the leaf root 21 near the leaf surface 22, with the detection end of the infrared sensors 4 facing the outside of the leaf surface 22.

[0033] refer to Figure 4 and Figure 5 The vertical section of the support beam 321 is I-shaped, and a temperature sensor 5 is installed on the upper part of the support beam 321.

[0034] During the process of heating and de-icing the blade body 2, the infrared sensor 4 can detect the distribution of ice on the blade surface 22 in real time, accurately identify the icing state of different areas of the blade surface 22, and transmit the detection data to the external control system. The external control system automatically plans the movement path of the electric slider 323 on the slide rail 322 based on the ice distribution information fed back by the infrared sensor 4, and drives the ultrasonic transducer 324 to move precisely to the area with thicker ice or difficult to remove, so as to achieve targeted vibration de-icing.

[0035] refer to Figure 1 and Figure 2 The outer side of leaf 22 is coated with a hydrophobic medium.

[0036] The hydrophobic medium coated on the outer side of the leaf 22 can form a low surface energy protective layer on the surface of the leaf 22, which significantly reduces the adhesion between water vapor and the leaf 22. At the same time, the hydrophobic medium can also weaken the bonding strength between the ice layer and the leaf 22, making the ice layer easier to fall off under the melting action of the heating component 31 or the centrifugal force of the rotating blade, further improving the overall de-icing efficiency.

[0037] Working principle: When ice forms on the surface of the blade body 2 in winter, the temperature sensor 5 on the upper part of the support beam 321 first detects an abnormal temperature in the blade body 2, which is below the icing critical point. At this time, the heater 311 inside the blade root 21 starts to work, and the generated hot airflow is evenly distributed to the two air guide pipes 312 through the three-way diversion valve, delivering the hot airflow to various areas of the blade surface 22. At the same time, the spiral heating wires 313 distributed at intervals on the outside of the air guide pipes 312 are energized and heat up, performing segmented secondary heating on the hot airflow whose temperature has decreased during transmission, ensuring that the hot airflow always maintains an effective ice-melting temperature inside the blade surface 22, and achieving uniform heating of the blade surface 22 to melt the ice layer. During this process, the infrared sensor 4 detects the distribution of the ice layer on the blade surface 22 in real time and accurately identifies the ice layer. The thickness and coverage area are determined, and the data is transmitted to an external control system. The external control system automatically plans the movement path of the electric slider 323 on the upper and lower slide rails 322 of the support beam 321 based on the ice distribution information. The electric slider 323 drives the ultrasonic transducer 324 to move precisely to the area where the ice layer is thicker or difficult to remove. The ultrasonic vibration accelerates the removal of the ice layer. At the same time, the hydrophobic medium coated on the front outer side of the blade 22 forms a low surface energy protective layer on the blade 22. This reduces the probability of initial water vapor adhering to and freezing on the blade 22, and weakens the bonding strength between the formed ice layer and the blade 22. This makes it easier for the ice layer to completely fall off under the combined action of heating and melting, ultrasonic vibration and centrifugal force of blade rotation. Ultimately, this achieves a highly efficient, precise and low-load blade de-icing effect.

[0038] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model, which is defined by the appended claims and their equivalents.

Claims

1. A de-icing device for wind turbine blades, characterized in that, The device includes a rotating shaft (1), and three blade bodies (2) arranged in a circular array on the outer side of the rotating shaft (1). Each blade body (2) includes a blade root (21) arranged on the outer side of the rotating shaft (1). A blade surface (22) is arranged on the side of the blade root (21) away from the rotating shaft (1). An ice removal mechanism (3) is provided on the blade body (2). The ice removal mechanism (3) includes a heating component (31) for melting ice and a vibration component (32) for accelerating the shedding of ice. The vibration assembly (32) includes a support beam (321) disposed inside the blade (22). Slide rails (322) are provided on both the upper and lower sides of the support beam (321). An electric slider (323) is slidably disposed on the slide rail (322). An ultrasonic transducer (324) is disposed on the side of the electric slider (323) away from the slide rail (322).

2. The wind turbine blade de-icing device as described in claim 1, characterized in that: The heating assembly (31) includes a heater (311) disposed inside the blade root (21). The hot air outlet end of the heater (311) is connected to two air guide pipes (312) through a three-way diverter valve. Both air guide pipes (312) are inserted inside the blade surface (22) and are located on the upper and lower sides of the support beam (321), respectively.

3. The wind turbine blade de-icing device as described in claim 2, characterized in that: The outer side of the air guide tube (312) is fitted with a plurality of spiral heating wires (313), which are distributed at intervals along the length of the air guide tube (312), and both ends of the heating wires (313) are connected to the inner side of the support beam (321).

4. The wind turbine blade de-icing device as described in claim 1, characterized in that: Multiple infrared sensors (4) arranged in a circular array are provided on the side of the leaf root (21) near the leaf surface (22), with the detection end of the infrared sensors (4) facing the outside of the leaf surface (22).

5. The wind turbine blade de-icing device as described in claim 1, characterized in that: The vertical section of the support beam (321) is I-shaped, and a temperature sensor (5) is provided on the upper part of the support beam (321).

6. The wind turbine blade de-icing device as described in claim 1, characterized in that: The outer side of the leaf surface (22) is coated with a hydrophobic medium.

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