Ice melting device for fan blade

Abstract

The utility model relates to the technical field of wind driven generators, and discloses a fan blade ice melting device which comprises a blade body, one end of the blade body is a root portion, the other end of the blade body is a front end portion, and one side of the blade body is a rear edge. According to the utility model, the power supply in the anti-icing control cabinet is started at the root part of the blade, the micro air suction pump is started to run, outside air is absorbed and enters the pump, cold air is changed into hot air after being heated by the micro heater, and then the hot air is blown to the front end of the blade through the air guide pipe; according to the ice melting device, the blade tip is designed, the blade tip is provided with the flow guide protrusions, hot air flows towards the rear edge channel through the blade tip and then flows into the front edge channel, backflow circulation and repeated circulation are formed, then the temperature rises, heat is transmitted to the blade surface, and therefore the ice melting purpose is achieved, and by designing the flow guide plates and arranging the flow guide protrusions on the flow guide plates, hot air flow operation is more uniform; and uniform heating is realized, so that the ice melting surface area is enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to an ice melting device for wind turbine blades. Background Technique

[0002] Most wind farms are located at an altitude of 1600 - 1700 meters, with frequent fog and high humidity all year round. They are typical mountain wind farms, and the lowest ambient temperature in winter can reach -16°C.

[0003] When wind turbine units operate in a cold climate environment, severe icing usually occurs on the surface of the turbine blades in winter. After icing, the aerodynamic shape of the blades changes significantly, which will seriously affect the aerodynamic efficiency of the blades, reduce the power generation efficiency of the units, and increase the loads of the units and blades after icing. When the load and mass moment of inertia of the three blades differ from each other by a certain degree, it usually causes vibration of the unit, thus affecting the safe and stable operation of the unit. Usually, for the safe operation of the unit, the unit will stop running after the blades are iced. Therefore, icing of wind turbine blades will lead to serious power generation losses.

[0004] Therefore, we need to provide an ice melting device for wind turbine blades. Content of the Utility Model

[0005] The purpose of the utility model is to provide an ice melting device for wind turbine blades to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An ice melting device for wind turbine blades, including a blade body, one end of the blade body is a root, the other end of the blade body is a front end, one side of the blade body is a trailing edge, the other side of the blade body is a leading edge, and a wire groove is provided on the leading edge, and a wire through hole is arranged in the wire groove. The interior of the blade body is cavity-shaped, and a circulating hot air component is arranged in the cavity. A heat supply and power supply component is arranged on the outer surface of the leading edge and inside the root; the heat supply and power supply component includes a heating component and a mounting component.

[0007] Preferably, the heating component is specifically a heating film layer, the heating film layer is laid on the leading edge of the blade, accounting for 2 / 3 of the entire blade length. The heating film layer is specifically a graphite-based composite material. A lightning protection film layer is laid on the surface of the heating film layer. The lightning protection film layer is specifically a lightning protection net composite material. An insulating film layer is arranged between the heating film layer and the lightning protection film layer. An anti-corrosion coating film layer is coated on the surface of the lightning protection film layer.

[0008] Preferably, the installation component includes the following structure: a hub disc installed inside the root; a mounting bracket fixedly installed on the surface of the hub disc; an anti-icing control cabinet is arranged on the mounting bracket, and two groups of foot seats are fixedly installed on both sides of the outer wall of the anti-icing control cabinet. A connecting seat is movably connected to the foot seat, and a clamping hole is formed in the connecting seat.

[0009] Preferably, fixed seats are fixedly installed at both ends of the mounting bracket. A T-shaped groove is formed in the fixed seat, and a T-shaped cover plate is adaptively installed. A moving groove is formed on the surface of the T-shaped cover plate. A T-shaped moving block is slidably connected inside the T-shaped groove. A compression spring is fixedly connected between one side of the vertical branch section of the T-shaped moving block and the T-shaped groove. A moving handle post adapted to the moving groove is fixedly connected to the surface of the lower branch section of the T-shaped moving block. One end of the horizontal branch section of the T-shaped moving block is fixedly connected to a clamping post that engages with the clamping hole.

[0010] Preferably, the power supply wire and signal wire of the heating component enter the cavity through the wire passing holes on the wire trough. The cable runs along the inner surface of the blade in the cavity and is finally electrically connected to the anti-icing control cabinet.

[0011] Preferably, the circulating hot air component includes the following structure: a ventilation opening is formed at the top of the blade root; a shear web is hermetically installed on the side wall of the blade inner cavity. The cavity below the shear web is a leading edge channel, and the cavity above the shear web is a trailing edge channel, so that the internal air can flow from the leading edge channel to the trailing edge channel and then flow back to the leading edge channel to form a reflux cycle.

[0012] Preferably, a micro air suction pump electrically connected to the anti-icing control cabinet is arranged inside the ventilation opening. The output end of the micro air suction pump is communicated with a duct through a micro heater.

[0013] Preferably, guide plates are hermetically installed between the top and bottom of the shear web and the blade inner cavity. A guide protrusion is integrally connected to the guide plate.

[0014] The utility model provides a de-icing device for a fan blade. It has the following beneficial effects:

[0015] (1). By starting the power supply in the anti-icing control cabinet at the blade root, the utility model supplies power to heat the heating film layer on the heating component, and then the temperature rises to achieve the effect of de-icing the ice and snow on the outer surface of the blade leading edge.

[0016] (2) In this utility model, the power supply in the anti-icing control cabinet is started at the blade root, and then the micro air suction pump starts to operate, sucking in outside air into the pump. After being heated by the micro heater, the cold air becomes hot air, and then the hot air is blown towards the blade tip through the air duct. Due to the design of the shear web, the hot air flows through the blade tip towards the trailing edge channel and then back to the leading edge channel, forming a reflux cycle. Through repeated cycling, the temperature rises, and the heat is transferred to the blade surface, thereby achieving the purpose of ice melting. Among them, by designing the deflector plate with deflector protrusions on it, the hot air flow can operate more uniformly, achieving uniform heating and thus expanding the ice melting surface area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the overall structure of the fan blade of this utility model;

[0018] Figure 2 is a bottom view of the overall structure of the fan blade of this utility model;

[0019] Figure 3 is a partial structural view of the heat supply and power supply component of this utility model;

[0020] Figure 4 is for this utility model Figure 3 an enlarged view of A therein;

[0021] Figure 5 is a schematic view of the root structure of the fan blade of this utility model;

[0022] Figure 6 is for this utility model Figure 5 an enlarged view of A therein;

[0023] Figure 7 is a cross-sectional view of the overall structure of the fan blade of this utility model.

[0024] In the figure: 11 blade body, 12 root, 13 front end, 14 trailing edge, 15 leading edge, 16 wire groove, 17 wire perforation, 2 heat supply and power supply component, 3 circulating hot air component, 211 heating film layer, 212 insulating film layer, 213 lightning protection film layer, 214 anti-corrosion coating film layer, 215 hub disc, 216 anti-icing control cabinet, 217 mounting bracket, 221 footrest, 222 connecting seat, 223 fixing seat, 224 T-shaped groove, 225 T-shaped cover plate, 226 T-shaped moving block, 227 compression spring, 228 moving handle post, 229 clamping post, 311 ventilation opening, 312 shear web, 313 deflector plate, 314 deflector protrusion, 315 micro air suction pump, 316 micro heater, 317 air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model.

[0027] Embodiment 1

[0028] A preferred embodiment of the ice melting device for a wind turbine blade provided by the present utility model is as Figure 1-7 shown: An ice melting device for a wind turbine blade includes a blade body 11. One end of the blade body 11 is a root 12, and the other end of the blade body 11 is a front end 13. One side of the blade body 11 is a trailing edge 14, and the other side of the blade body 11 is a leading edge 15. A wire groove 16 is provided on the leading edge 15, and a wire perforation 17 is provided inside the wire groove 16. The inside of the blade body 11 is in a cavity shape, and a circulating hot air component 3 is provided in the cavity. A heat supply and power supply component 2 is provided on the outer surface of the leading edge 15 and inside the root 12; The heat supply and power supply component 2 includes a heating component and a mounting component;

[0029] In this embodiment, it is further obtained that: The heating component is specifically a heating film layer 211. The heating film layer 211 is laid on the leading edge of the blade and accounts for 2 / 3 of the entire blade length. The heating film layer 211 is specifically a graphite-based composite material. A lightning protection film layer 213 is laid on the surface of the heating film layer 211. The lightning protection film layer 213 is specifically a lightning protection net composite material. It is required that the lightning protection net completely covers the heating film. An insulating film layer 212 is provided between the heating film layer 211 and the lightning protection film layer 213 to prevent the heating film from being damaged by lightning current. An anti-corrosion coating film layer 214 is coated on the surface of the lightning protection film layer 213 to play a protective role;

[0030] In this embodiment, it is further obtained that: The mounting component includes the following structure: A hub disc 215 is installed inside the root 12; A mounting bracket 217 is fixedly installed on the surface of the hub disc 215; An anti-icing control cabinet 216 is provided on the mounting bracket 217. Two groups of feet 221 are fixedly installed on both sides of the outer wall of the anti-icing control cabinet 216. A connecting seat 222 is movably connected to the feet 221, and a card hole is provided on the connecting seat 222;

[0031] In this embodiment, it is further obtained that fixing seats 223 are fixedly installed at both ends of the mounting bracket 217. A T-shaped groove 224 is formed in the fixing seat 223, and a T-shaped cover plate 225 is adaptively installed thereon. A moving groove is formed on the surface of the T-shaped cover plate 225. A T-shaped moving block 226 is slidably connected inside the T-shaped groove 224. A compression spring 227 is fixedly connected between one side of the vertical branch section of the T-shaped moving block 226 and the T-shaped groove 224. A moving handle post 228 adapted to the moving groove is fixedly connected to the surface of the lower branch section of the T-shaped moving block 226. One end of the horizontal branch section of the T-shaped moving block 226 is fixedly connected with a clamping post 229 that is clamped with the clamping hole.

[0032] In this embodiment, by pulling the moving handle post 228, the moving handle post 228 drives the T-shaped moving block 226 to slide in the T-shaped groove 224 under the action of the compression spring 227, so that the clamping post 229 on the T-shaped moving block 226 is disengaged from the state of being clamped with the clamping hole, thereby achieving the effect of quickly disassembling the anti-icing control cabinet 216.

[0033] In this embodiment, it is further obtained that the power supply line and signal line of the heating component enter the cavity through the wire passing hole 17 on the wire routing groove 16. The cable routes along the inner surface of the blade in the cavity and is finally electrically connected to the anti-icing control cabinet 216.

[0034] In this embodiment, by starting the power supply in the anti-icing control cabinet 216 at the blade root, power is supplied to the heating film layer 211 on the heating component for heating, and then the temperature rises to achieve the effect of melting the ice and snow on the outer surface of the blade leading edge.

[0035] Embodiment 2

[0036] Please refer to Figure 1 - Figure 7 and, on the basis of Embodiment 1, it is further obtained that the circulating hot air component 3 includes the following structures: a ventilation opening 311, which is opened at the top of the blade root; a shear web 312, which is hermetically installed on the side wall of the blade inner cavity. The cavity below the shear web 312 is a leading edge channel, and the cavity above the shear web 312 is a trailing edge channel, so that the internal air can flow from the leading edge channel to the trailing edge channel and then flow back to the leading edge channel to form a reflux cycle; a micro air suction pump 315 electrically connected to the anti-icing control cabinet 216 is installed inside the ventilation opening 311, and the output end of the micro air suction pump 315 is connected to a duct 317 through a micro heater 316; flow guiding plates 313 are hermetically installed between the top and bottom of the shear web 312 and the blade inner cavity, and flow guiding protrusions 314 are integrally connected to the flow guiding plates 313.

[0037] In this embodiment, by starting the power supply in the anti-icing control cabinet 216 at the blade root, the micro-suction pump 315 is started and operates accordingly. It absorbs external air into the pump. After being heated by the micro-heater 316, the cold air becomes hot air. Then, the hot air is blown towards the front end of the blade through the air duct 317. Due to the design of the shear web 312, the hot air flows through the blade tip towards the trailing edge channel and then flows back into the leading edge channel, forming a reflux cycle. After repeated cycling, the temperature rises, and the heat is transferred to the blade surface, thereby achieving the purpose of ice melting. Among them, by designing the deflector 313 with deflector protrusions 314 on it, the hot air flow can operate more uniformly, achieving uniform heating and thus expanding the ice melting surface area.

[0038] Working principle: When the surface of the blade is covered with ice and snow, by starting the power supply in the anti-icing control cabinet 216 at the blade root, the heating film layer 211 on the heating component is powered and heated, so that the temperature rises to melt the ice and snow on the outer surface of the blade leading edge. On the other hand, start the micro-suction pump 315 and the micro-heater 316. The micro-suction pump 315 absorbs external air into the pump. After being heated by the micro-heater 316, the cold air becomes hot air. Then, the hot air is blown towards the front end of the blade through the air duct 317. Due to the design of the shear web 312, the hot air flows through the blade tip towards the trailing edge channel and then flows back into the leading edge channel, forming a reflux cycle. After repeated cycling, the temperature rises, and the heat is transferred to the blade surface, thereby achieving the purpose of ice melting.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fan blade de-icing device, comprising a blade body (11), characterized in that: One end of the blade body (11) is a root (12), the other end of the blade body (11) is a front end (13), one side of the blade body (11) is a trailing edge (14), the other side of the blade body (11) is a leading edge (15), and the leading edge (15) is provided with a wiring groove (16), and the wiring groove (16) is provided with a wiring through hole (17), the interior of the blade body (11) is in a cavity shape, and a circulating air heating component (3) is provided in the cavity, and a heat supply and power supply component (2) is provided on the outer surface of the leading edge (15) and in the root (12); the heat supply and power supply component (2) comprises a heating component and a mounting component.

2. A fan blade de-icing device according to claim 1, characterized in that: The heating component is specifically a heating film layer (211), the heating film layer (211) is laid on the leading edge of the blade and occupies 2 / 3 of the entire length of the blade, the heating film layer (211) is specifically a graphite-based composite material, a lightning protection film layer (213) is laid on the surface of the heating film layer (211), the lightning protection film layer (213) is specifically a lightning protection net composite material, an insulating film layer (212) is arranged between the heating film layer (211) and the lightning protection film layer (213), and the surface of the lightning protection film layer (213) is coated with an anti-corrosion coating film layer (214).

3. The fan blade de-icing device according to claim 1, characterized in that: The installation component includes the following structure: a wheel hub (215), installed in the root (12); a mounting bracket (217), fixedly installed on the surface of the wheel hub (215); an anti-icing control cabinet (216) is arranged on the mounting bracket (217), two groups of foot seats (221) are fixedly installed on both sides of the outer wall of the anti-icing control cabinet (216), a connecting seat (222) is movably connected to the foot seat (221), and a clamping hole is opened on the connecting seat (222).

4. A fan blade de-icing device according to claim 3, characterized in that: A fixing seat (223) is fixedly installed at both ends of the mounting bracket (217), a T-shaped groove (224) is provided on the fixing seat (223), and a T-shaped cover plate (225) is installed thereon, a movable groove is provided on the surface of the T-shaped cover plate (225), a T-shaped movable block (226) is built-in and slidably connected to the T-shaped groove (224), a compression spring (227) is fixedly connected between one side of the vertical branch section of the T-shaped movable block (226) and the T-shaped groove (224), a movable handle column (228) adapted to the movable groove is fixedly connected to the surface of the lower branch section of the T-shaped movable block (226), and a clamping column (229) engaged with the clamping hole is fixedly connected to one end of the horizontal branch section of the T-shaped movable block (226).

5. The fan blade de-icing device according to claim 1, characterized in that: The power supply line and signal line of the heating component enter the cavity through the wiring through hole (17) on the wiring groove (16), and the cable is routed along the inner surface of the blade in the cavity and is finally electrically connected to the anti-icing control cabinet (216).

6. The fan blade de-icing device according to claim 1, characterized in that: The circulating air heating component (3) comprises the following structure: a vent (311) opened at the top of the blade root; a shear web (312) sealed and installed with the side wall of the blade inner cavity, and the cavity below the shear web (312) is a leading edge channel, and the cavity above the shear web (312) is a trailing edge channel, so that the internal air can flow from the leading edge channel to the trailing edge channel, and then flow back to the leading edge channel to form a reflow cycle.

7. A fan blade de-icing device according to claim 6, characterized in that: The vent (311) is internally provided with a micro air suction pump (315) electrically connected to the anti-icing control cabinet (216); the output end of the micro air suction pump (315) is connected to the air guide pipe (317) via a micro heater (316).

8. The fan blade de-icing device according to claim 6, characterized in that: A guide plate (313) is sealedly installed between the top and bottom of the shear web (312) and the inner cavity of the blade, and a guide protrusion (314) is integrally connected to the guide plate (313).

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