Wind power blade lifting type double-body deicing device and using method thereof

Abstract

The invention discloses a wind power blade lifting type double-body deicing device and a using method thereof. The device comprises a double-body device, a traction belt, a lifting belt and a lifting motor. The double-body device is divided into a front edge device and a rear edge device which are connected through a traction belt, and the double-body device is hung on a lifting motor through a lifting belt. A hanging ring and a support are arranged above the double-body device, and a deicing mechanism is arranged on the front edge. Winding devices are arranged on the two sides of the rear edge. The method comprises the steps that the lifting motor drives the double-body device to ascend and descend; the winch tightens the traction belt, the double-body device clamps the blades, and the blades are supported, adjusted and fixed; the deicing mechanism is started to clean accumulated ice; the traction belt is loosened, and the device moves downwards; and the operation is repeated until three-blade deicing is completed. Full-blade quick deicing of the wind turbine blade is achieved through self-lifting mechanical deicing when ice accumulation is serious, the problems that an existing deicing method is low in efficiency, large in energy consumption and the like are solved, serious accidents such as blade breakage and tower drum collapse are avoided, and the continuous power supply capacity of a wind turbine generator in extreme weather is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of de-icing of wind turbine blades, and particularly relates to a lifting double-body de-icing device for wind turbine blades and a using method thereof. Background Art

[0002] Existing large-scale wind farms are mostly distributed in high-latitude and high-altitude areas with richer wind power resources. However, extreme weather such as frost and freezing rain frequently occurs in these areas, which easily causes icing problems on wind turbine blades. In mild cases, the turbines need to be shut down for maintenance, and in severe cases, malignant disaster accidents such as the fracture and collapse of wind turbine blades and wind turbine units may occur.

[0003] Currently, the mainstream de-icing methods for wind turbine blades include electric heating de-icing, gas heating de-icing, and manual de-icing, etc. Among them, the electric heating de-icing method means laying heating resistors on the blade surface, and the thermal resistors convert electrical energy into resistive heat and transfer it to the blade surface, thereby achieving the effect of de-icing. This method can prevent and remove ice from wind turbine blades when icing is about to occur or the ice thickness is relatively small. However, this method has disadvantages such as high energy consumption, low de-icing efficiency when the ice accumulation is serious, and the reduction of blade life due to thermal stress, and it cannot meet the requirement of rapid de-icing of wind turbine blades when the ice accumulation is serious. The gas heating de-icing method means introducing hot air flow into the blade cavity, and the heat is conducted from the blade cavity to the outer surface, and the outer surface of the wind turbine blade is gradually heated, thereby melting the ice layer. This method can also prevent and remove ice from wind turbine blades when icing is about to occur or the ice thickness is relatively small. However, this method has disadvantages such as low energy utilization rate and the existence of an upper limit on the heating distance, and it cannot meet the anti / de-icing requirements of ultra-long wind turbine blades, nor can it meet the requirement of rapid de-icing of wind turbine blades when the ice accumulation is serious. Manual de-icing means that when the blade stops running, through an aerial cable, the operator manually knocks and removes ice in the ice-covered area of the blade. This method has the lowest energy consumption and can meet the de-icing requirements of wind turbine blades when the ice accumulation is serious. However, this method usually requires high-altitude operations on a tower barrel or a suspension platform 80 - 150 meters high, and it is necessary to consider the impact of adverse weather such as strong winds and low temperatures as well as the accidental collapse of the ice layer on the safety of the operators. To sum up, several currently mainstream de-icing methods for wind turbine blades cannot meet the requirement of rapid de-icing of wind turbine blades when the ice accumulation is serious.

[0004] Therefore, the invention provides a lifting double-body de-icing device for wind turbine blades. Through the self-lifting method, the rapid de-icing of the device on the entire blade is realized; through the double-body device, the de-icing requirements of the entire blade of different types of blades are met; through unmanned multi-action de-icing, the problems of high energy consumption and slow de-icing of other de-icing methods when the ice accumulation is serious are solved, and the malignant disaster accidents of wind turbine blades and wind turbine units when the ice accumulation is serious are avoided.

[0005] Currently, there is no lifting double-body de-icing device for wind turbine blades and a using method thereof that can be used for rapid de-icing of wind turbine blades when the ice accumulation is serious in the market. Summary of the Invention

[0006] The content of the present invention aims at the difficulties existing in the above-mentioned prior art, and provides a lifting double-body de-icing device for wind turbine blades. The double-body device is lifted by hoisting, and the de-icing main body is divided into a trailing-edge device and a leading-edge device. The traction belt is tightened by a winch, so that the trailing-edge frame and the leading-edge frame at both ends of the traction belt are clamped on the wind turbine blade, and are closely attached to the surface of the wind turbine blade through the flexibility of the frame support.

[0007] To solve the above problems, the technical solution adopted by the present invention is: A lifting double-body de-icing device for wind turbine blades, comprising a leading-edge device, a trailing-edge device, a lifting motor, a lifting belt and a traction belt.

[0008] The trailing-edge device is located at the trailing edge of the blade of the wind turbine, and the leading-edge device is located at the leading edge of the blade of the wind turbine. The trailing-edge device and the leading-edge device are connected by a traction belt. A lifting belt is connected above the trailing-edge device and the leading-edge device. One end of the lifting belt far away from the trailing-edge device and the leading-edge device is connected with a lifting motor, and the lifting motor is installed at the position of the wind turbine nacelle.

[0009] A further technical improvement of the present invention lies in that: the trailing-edge device includes a trailing-edge frame, a trailing-edge lifting ring and a trailing-edge support frame are arranged above the trailing-edge frame, a trailing-edge support foot is installed at the end of the trailing-edge support frame, winch bases are arranged on the outer sides of both sides of the trailing-edge frame, a winch is installed on the upper side of the winch base, a belt pulley is connected to the end of the winch shaft, and a pulley is arranged in front of the belt pulley.

[0010] A further technical improvement of the present invention lies in that: the leading-edge device includes a leading-edge frame, a leading-edge lifting ring and a leading-edge support frame are arranged above the leading-edge frame, a leading-edge support foot is arranged at the end of the leading-edge support frame, a de-icing wheel base is connected to the outside of the leading-edge frame, a de-icing wheel shaft is installed on the de-icing wheel base, a de-icing wheel is fitted on the outside of the de-icing wheel shaft, a de-icing wheel motor is connected to the upper end of the de-icing wheel shaft, and de-icing drill mechanisms are arranged on both sides of the de-icing wheel base.

[0011] A further technical improvement of the present invention lies in that: the de-icing drill mechanism includes a de-icing wheel base, a de-icing drill motor is arranged on the de-icing wheel base, the de-icing drill motor is connected to a de-icing drill rotating shaft, the end of the de-icing drill rotating shaft is connected to a de-icing drill bit through a connecting shaft, and a de-icing knife is arranged on the de-icing drill bit.

[0012] A further technical improvement of the present invention lies in that: the lifting belt is connected to the trailing edge sling and the leading edge sling to realize the hoisting of the trailing edge frame and the leading edge frame. When the trailing edge frame and the leading edge frame are hoisted to the de-icing area of the wind turbine blade, the winch tightens the traction belt wound around the pulley, so that the trailing edge frame and the leading edge frame approach and clamp on the surface of the wind turbine blade. At this time, the trailing edge support feet and the leading edge support feet are attached to the surface of the wind turbine blade by rotating and adjusting the attitude, completing the fixation of the wind turbine blade de-icing device.

[0013] A further technical improvement of the present invention lies in that: the de-icing wheel motor drives the de-icing wheel shaft to drive the de-icing wheel to rotate to realize de-icing.

[0014] A further technical improvement of the present invention lies in that: the de-icing drill motor drives the de-icing drill rotating shaft to rotate, the de-icing drill rotating shaft drives the de-icing drill bit and the de-icing rotary knife, and the de-icing drill bit can rotate a certain angle around the rotating shaft during de-icing to realize a small-range adjustment of the de-icing knife.

[0015] A method for using a lifting double-body de-icing device for wind turbine blades specifically includes the following steps: S1. The lifting motor (4) operates, and the trailing edge device (1) and the leading edge device (2) are lifted through the lifting belt (5) to move the wind turbine blade de-icing device to the ice accumulation section area of the blade; S2. The winch (1-4) tightens the traction belt wound around the pulley (1-7) to make the trailing edge frame (1-8) and the leading edge frame (2-9) approach and clamp on the surface of the wind turbine blade. At this time, the trailing edge support feet (1-6) and the leading edge support feet (2-1) are attached to the surface of the wind turbine blade by rotating and adjusting the attitude to fix the wind turbine blade de-icing device and complete the arrangement; S3. The de-icing wheel motor (2-6) drives the de-icing wheel shaft (2-7) to drive the de-icing wheel (2-8) to rotate to clean the ice accumulation near the stagnation point of the blade leading edge; S4. The de-icing drill motor (2-4-1) drives the de-icing drill rotating shaft (2-4-3) to rotate, and the de-icing drill rotating shaft (2-4-4) drives the de-icing drill bit (2-4-5) and the de-icing rotary knife (2-4-6) to clean the ice accumulation on both sides of the blade leading edge; S5. The traction belt (3) is relaxed, the trailing edge frame (1-8) and the leading edge frame (2-9) are disengaged, the lifting motor (4) works, and the trailing edge device (1) and the leading edge device (2) are moved to the next de-icing area and the above process is repeated until the de-icing at the blade tip is completed. At this time, the de-icing of a single blade is completed; S6. The fan rotates 120°, and the above process is repeated to complete the de-icing of the three blades.

[0016] The present invention has the following beneficial effects: 1. The wind turbine blade de-icing device of the present invention realizes the rapid movement of the double-body device on the wind turbine blade through hoisting, has strong adaptability and high safety.

[0017] 2. The double-body device of the present invention divides the de-icing main body of the wind turbine blade into a leading-edge device and a trailing-edge device. By tightening the traction belt, the clamping of the double-body device on the blade surface is completed, and it can adapt to different chordal distances of blade segments at different positions.

[0018] 3. The leading-edge bracket and the trailing-edge bracket of the present invention adopt approximate shapes that conform to the geometric characteristics of the blade, and can better fit the blade surface.

[0019] 4. The leading-edge support feet and the trailing-edge support feet of the present invention adopt shapes that conform to the characteristics of the leading edge and the trailing edge, and are respectively distributed in the chordal direction and the span direction. Through hinges, they can move within a certain range, and can further provide a supporting role for the device.

[0020] 5. The de-icing wheel of the present invention can specifically remove the thick ice accumulation on the leading edge through its own rotation.

[0021] 6. The de-icing drill of the present invention is small in volume and is more flexible in cleaning the relatively thin ice on both sides of the leading edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the working state of the lifting double-body de-icing device for wind turbine blades of the present invention Figure 2 Schematic diagram of the structure of the trailing-edge device of the lifting double-body de-icing device for wind turbine blades of the present invention Figure 3 Schematic diagram of the structure of the leading-edge device of the lifting double-body de-icing device for wind turbine blades of the present invention Figure 4 Schematic diagram of the de-icing drill structure Figure 5 Flow chart of the device working process of the present invention In the figure: 1 - trailing-edge device, 2 - leading-edge device, 3 - traction belt, 4 - lifting motor, 5 - lifting belt, 6 - wind turbine generator, 1-1 - trailing-edge support frame, 1-2 - winch base, 1-3 - belt reel, 1-4 - winch, 1-5 - trailing-edge lifting ring, 1-6 trailing-edge support feet, 1-7 - pulley, 1-8 - trailing-edge frame, 2-1 - leading-edge support feet, 2-2 - leading-edge lifting ring, 2-3 - de-icing wheel base, 2-4 - de-icing drill device, 2-5 - leading-edge support frame, 2-6 - de-icing wheel motor, 2-7 - de-icing wheel shaft, 2-8 - de-icing wheel, 2-9 - leading-edge frame, 2-4-1 - de-icing drill motor, 2-4-2 de-icing drill base, 2-4-3 de-icing drill shaft, 2-4-4 - shaft, 2-4-5 - de-icing drill bit, 2-4-6 - de-icing knife. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0024] A lifting double-body de-icing device for a wind turbine blade, as Figure 1 shown, includes a trailing edge device 1, a leading edge device 2, a lifting motor 4, a traction belt 3, and a lifting belt 5. The trailing edge device is located at the trailing edge of the blade of the wind turbine 6, and the leading edge device is located at the leading edge of the blade of the wind turbine 6. The trailing edge device 1 and the leading edge device 2 are connected by a traction belt 3. A lifting belt 5 is connected above the trailing edge device 1 and the leading edge device 2. One end of the lifting belt 3 away from the trailing edge device 1 and the leading edge device 2 is connected to a lifting motor 4, and the lifting motor 4 is installed at the nacelle position of the wind turbine 6.

[0025] As Figure 2 shown, the trailing edge device 1 includes a trailing edge 1-8. Above the trailing edge frame 1-8, there are a trailing edge lifting ring 1-8 and the trailing edge support frame 1-1. The end of the trailing edge support frame 1-1 is installed with a trailing edge support foot 1-6. On the outer sides of the trailing edge frame 1, there are winch bases 1-2. A winch 1-4 is installed on the upper side of the winch base 1-2. The shaft end of the winch 1-4 is connected to a spool 1-3, and a pulley 1-5 is provided in front of the spool 1-3.

[0026] As Figure 3 shown, the leading edge device includes a leading edge frame 2-9. Above the leading edge frame 2-9, there are a leading edge lifting ring 2-2 and a leading edge support frame 2-5. The end of the leading edge support frame 2-5 is provided with a leading edge support foot 2-6. The outside of the leading edge frame 2-9 is connected to an ice removal wheel base 2-3. An ice removal wheel shaft 2-7 is installed on the ice removal wheel base 2-3. An ice removal wheel 2-8 is fitted outside the ice removal wheel shaft 2-7. The upper end of the ice removal wheel shaft 2-7 is connected to an ice removal wheel motor 2-6. Ice removal drill mechanisms 2-4 are provided on both sides of the ice removal wheel base 2-3.

[0027] As Figure 4 shown, the ice removal drill mechanism 2-4 includes an ice removal drill base 2-4-2. The ice removal drill base 2-4-2 is provided with an ice removal drill motor 2-4-1. The ice removal drill motor 2-4-1 is connected to an ice removal drill rotating shaft 2-4-3. The end of the ice removal drill rotating shaft 2-4-3 is connected to an ice removal drill bit 2-4-5 through a connecting shaft 2-4-4. The ice removal drill bit 2-4-5 is provided with an ice removal blade 2-4-6.

[0028] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, the trailing edge sling 1-5 and the leading edge sling 2-2 are connected by a lifting belt 5 to hoist the trailing edge frame 1-8 and the leading edge frame 2-9. When the trailing edge frame 1-8 and the leading edge frame 2-9 are hoisted to the de-icing area of the wind turbine blade, the winch 1-4 tightens the traction belt wound around the pulley 1-7 to bring the trailing edge frame 1-8 and the leading edge frame 2-9 closer and clamp them on the surface of the wind turbine blade. At this time, the trailing edge support feet 1-6 and the leading edge support feet 2-1 are adjusted in attitude by rotation to fit the surface of the wind turbine blade, completing the fixation of the wind turbine blade de-icing device.

[0029] As Figure 3 shown, the de-icing wheel motor 2-6 drives the de-icing wheel shaft 2-7 to drive the de-icing wheel 2-8 to rotate, realizing de-icing.

[0030] As Figure 4 shown, the de-icing drill motor 2-4-1 drives the de-icing drill rotating shaft 2-4-3 to rotate. The de-icing drill rotating shaft 2-4-3 drives the de-icing drill bit 2-4-5 and the de-icing rotary knife 2-4-6. The de-icing drill bit 2-4-5 can rotate around the rotating shaft 2-4-4 by a certain angle during de-icing to realize a small-range adjustment of the de-icing knife 2-4-6.

[0031] As Figure 5 shown, a protection method for the use method of a lifting double-body de-icing device for wind turbine blades specifically includes the following steps: S1. The lifting motor (4) operates to lift the trailing edge device (1) and the leading edge device (2) through the lifting belt (5), moving the wind turbine blade de-icing device to the ice accumulation section area of the blade; S2. The winch (1-4) tightens the traction belt wound around the pulley (1-7) to bring the trailing edge frame (1-8) and the leading edge frame (2-9) closer and clamp them on the surface of the wind turbine blade. At this time, the trailing edge support feet (1-6) and the leading edge support feet (2-1) are adjusted in attitude by rotation to fit the surface of the wind turbine blade, fixing the wind turbine blade de-icing device and completing the layout; S3. The de-icing wheel motor (2-6) drives the de-icing wheel shaft (2-7) to drive the de-icing wheel (2-8) to rotate, realizing the cleaning of the ice accumulation near the stagnation point of the blade leading edge; S4. The de-icing drill motor (2-4-1) drives the de-icing drill rotating shaft (2-4-3) to rotate. The de-icing drill rotating shaft (2-4-4) drives the de-icing drill bit (2-4-5) and the de-icing rotary knife (2-4-6) to clean the ice accumulation on both sides of the blade leading edge; S5. The traction belt (3) is relaxed, the trailing edge frame (1-8) and the leading edge frame (2-9) are disengaged, the lifting motor (4) works, and the trailing edge device (1) and the leading edge device (2) are moved to the next de-icing area and the above process is repeated until the de-icing at the blade tip is completed. At this time, the de-icing of a single blade is completed; S6. The fan rotates 120°, and the above process is repeated to complete the de-icing of the three blades.

Claims

1. A lifting double-body de-icing device for a wind power blade, characterized in that: It includes a trailing edge device (1), a leading edge device (2), a lifting motor (4), a traction belt (3), and a lifting belt (5). The trailing edge device (1) is located at the trailing edge of the blade of the wind turbine (6), and the leading edge device (2) is located at the leading edge of the blade of the wind turbine (6). The trailing edge device (1) and the leading edge device (2) are connected by the traction belt (3). Above the trailing edge device (1) and the leading edge device (2), there is a lifting belt (5). One end of the lifting belt (3) far from the trailing edge device (1) and the leading edge device (2) is connected to the lifting motor (4), and the lifting motor (4) is installed at the nacelle position of the wind turbine (6).

2. The lift-type double-body de-icing device for wind turbine blades according to claim 1, wherein: The trailing edge device (1) includes a trailing edge frame (1-8). Above the trailing edge frame (1-8), there are a trailing edge lifting ring (1-5) and a trailing edge support frame (1-1). At the end of the trailing edge support frame (1-1), a trailing edge support foot (1-6) is installed. On the outer sides of the trailing edge frame, there are winch bases (1-2). On the upper side of the winch bases (1-2), winches (1-4) are installed. The shaft ends of the winches (1-4) are connected to belt pulleys (1-3). In front of the belt pulleys (1-3), there are pulleys (1-5).

3. The lift-type double-body de-icing device for wind turbine blades according to claim 1, characterized in that: The leading edge device (2) includes a leading edge frame (2-9). Above the leading edge frame (2-9), there are a leading edge lifting ring (2-2) and a leading edge support frame (2-5). At the end of the leading edge support frame (2-5), there is a leading edge support foot (2-6). The outside of the leading edge frame (2-9) is connected to an ice removal wheel base (2-3). An ice removal wheel shaft (2-7) is installed on the ice removal wheel base (2-3). An ice removal wheel (2-8) is fitted outside the ice removal wheel shaft (2-7). The upper end of the ice removal wheel shaft (2-8) is connected to an ice removal wheel motor (2-6). On both sides of the ice removal wheel base (2-3), there are ice removal drill mechanisms (2-4).

4. A lifting double-body de-icing device for a wind turbine blade according to claim 3, characterized in that: The ice removal drill mechanism (2-4) includes an ice removal drill base (2-4-2). Above the ice removal drill base (2-4-2), there is an ice removal drill motor (2-4-1). The ice removal drill motor (2-4-1) is connected to an ice removal drill rotating shaft (2-4-3). The end of the ice removal drill rotating shaft (2-4-3) is connected to an ice removal drill bit (2-4-5) through a connecting shaft (2-4-4). The ice removal drill bit (2-4-5) is provided with ice removal knives (2-4-6).

5. A lifting double-body de-icing device for a wind turbine blade according to claim 2, characterized in that: The lifting belt (5) connects the trailing edge lifting ring (1-5) and the leading edge lifting ring (2-2) to realize the hoisting of the trailing edge frame (1-8) and the leading edge frame (2-9). When the trailing edge frame (1-8) and the leading edge frame (2-9) are hoisted to the ice removal area of the wind turbine blade, the winch (1-4) tightens the traction belt wound around the pulley (1-7) to make the trailing edge frame (1-8) and the leading edge frame (2-9) approach and clamp on the surface of the wind turbine blade. At this time, the trailing edge support foot (1-6) and the leading edge support foot (2-1) adjust their postures by rotation to fit the surface of the wind turbine blade, completing the fixation of the double-body device of the wind turbine blade.

6. The lifting double-body de-icing device for wind turbine blades according to claim 3, wherein: The ice removal wheel motor (2-6) drives the ice removal wheel shaft (2-7) to drive the ice removal wheel (2-8) to rotate, cleaning the ice accumulation at the leading edge of the wind turbine blade.

7. A lifting double-body de-icing device for a wind turbine blade according to claim 4, characterized in that: The ice removal drill motor (2-4-1) drives the ice removal drill rotating shaft (2-4-3) to rotate. The ice removal drill rotating shaft (2-4-3) drives the ice removal drill bit (2-4-5) and the ice removal rotary knife (2-4-6). The ice removal drill bit (2-4-5) can rotate around the rotating shaft (2-4-4) by a certain angle during the ice removal process to achieve a small range adjustment of the ice removal knife (2-4-6).

8. A method for using a lifting double-body de-icing device for a wind turbine blade according to any one of claims 1-7, specifically including the following steps: S1. The lifting motor (4) operates, and the trailing edge device (1) and the leading edge device (2) are lifted through the lifting belt (5), moving the double-body device to the ice accumulation section area of the blade; S2. The winch (1-4) tightens the traction belt (3) wound around the pulley (1-7), bringing the trailing edge frame (1-8) and the leading edge frame (2-9) closer and clamping them on the surface of the wind turbine blade. At this time, the trailing edge support feet (1-6) and the leading edge support feet (2-1) are adjusted in posture by rotation to fit the surface of the wind turbine blade, fixing the double-body device of the wind turbine blade and completing the layout; S3. The ice removal wheel motor (2-6) drives the ice removal wheel shaft (2-7) to drive the ice removal wheel (2-8) to rotate, achieving the cleaning of the ice accumulation near the stagnation point at the leading edge of the blade; S4. The ice removal drill motor (2-4-1) drives the ice removal drill rotating shaft (2-4-3) to rotate, and the ice removal drill rotating shaft (2-4-4) drives the ice removal drill bit (2-4-5) and the ice removal rotary knife (2-4-6) to clean the ice accumulation on both sides of the leading edge of the blade; S5. The traction belt (3) is relaxed, the trailing edge frame (1-8) and the leading edge frame (2-9) are disengaged, the lifting motor (4) works, and the trailing edge device (1) and the leading edge device (2) are moved to the next ice removal area and the above process is repeated until the ice removal at the blade tip is completed. At this time, the ice removal of a single blade is completed; S6. The fan rotates 120°, and the above process is repeated to complete the ice removal of the three blades.

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