A preparation process for anti-icing wind turbine blades

Abstract

The present invention relates to the technical field of blade deicing, and specifically to a preparation process for anti-icing wind turbine blades, comprising a wind turbine body, an electric telescopic rod is arranged on the side of the wind turbine body, the end of the electric telescopic rod is fixedly connected to a shell, the wind turbine body is provided with a shell, an ice scraping structure for scraping off ice is arranged on the side of the wind turbine body, and a liquid spraying structure for spraying anti-icing chemicals is arranged inside the shell. The scraping plate is driven to slide on the wind turbine body to remove ice through the movement of a movable disk and the swinging of a swinging plate. Since the movable disk and the wind turbine body are spline-connected, the scraping plate will rotate synchronously with the wind turbine body and remove ice even when the wind turbine body rotates, thereby avoiding the inability of the wind turbine body to completely remove ice when it rotates, which is beneficial to improving the effect of removing ice and improving the power generation efficiency at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of blade deicing, and in particular to a preparation process for an anti-icing wind turbine blade. Background Art

[0002] Wind turbines are generally composed of wind rotors, generators, direction regulators, towers, speed limit safety structures, and energy storage devices. The working principle of a wind turbine is that the wind rotor rotates under the action of wind force, converting the kinetic energy of the wind into mechanical energy of the wind rotor shaft. The generator rotates and generates electricity under the drive of the wind rotor shaft.

[0003] After searching the application number: 202111572131.3, a device for preventing ice from covering the blades of a wind turbine is disclosed. Under the action of the blade rotating and squeezing the first wedge block to move to the left, the extended end of the first electric push rod is extended to push the second connecting rod and the extension rod to slide downward through the second L-shaped stopper, thereby realizing the downward movement of the elastic wiper to scrape off the thin ice on the blade. Secondly, the invention pushes the anti-icing chemical in the one-way liquid pumping chamber into the liquid outlet pipe through the piston block sliding downward, and sprays it from the nozzle to the blade through the liquid spray pipe, which can effectively prevent the blade from freezing.

[0004] Since the existing wind turbines are in a rotating state when generating electricity, and the above-mentioned document is in a straight line when scraping off ice and completes the scraping, and can only scrape one side of the blade, the above-mentioned document cannot completely scrape off the ice according to the length of the blade when scraping. If the ice on the blade cannot be completely scraped off, the long-term adhesion will reduce the service life of the blade, and even the balance of the blade will change, causing the blades in the wind turbine to shake, which not only reduces the power generation efficiency of the wind turbine, but also affects the service life of the blade;

[0005] Moreover, the distance between the above-mentioned nozzle and the blade is relatively far, and the nozzle is fixed. Therefore, the anti-icing chemical agent sprayed under the drive of external wind cannot stick to the surface of the blade. Even if it can be sprayed to the surface of the blade, it cannot completely cover the entire set of blades, thereby reducing the use effect of the anti-icing chemical agent. In view of this, we propose a preparation process for anti-icing wind turbine blades. Summary of the invention

[0006] The object of the present invention is to provide a process for preparing ice-proof wind turbine blades to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, a preparation process of an anti-icing wind turbine blade comprises the following steps:

[0008] S1. First, the staff will assemble the blades and impellers in the wind turbine and ensure that they are not damaged and can be used normally;

[0009] S2, installing the ice scraping structure and the liquid spraying structure to the tail of the wind turbine body respectively, and ensuring that the electric telescopic rod is activated after the sensor senses the ice, thereby completing the preparation of the wind turbine blades;

[0010] Wherein, a sensor is arranged inside the wind power generation body, an electric telescopic rod is arranged on the side of the wind power generation body, a shell is fixedly connected to the end of the electric telescopic rod, a shell is arranged inside the wind power generation body, an ice scraping structure for scraping ice is arranged on the side of the wind power generation body, and a liquid spraying structure for spraying anti-icing chemical agents is arranged inside the shell;

[0011] The ice scraping structure is opened to remove ice, and at the same time the liquid spraying structure is driven to form a cone to protect the sprayed anti-icing chemical agent, and the rotation speed of the wind power generation body is increased.

[0012] Preferably, the ice scraping structure includes a movable disk, a side of the movable disk away from the wind turbine body is fixedly connected to the output end of the electric telescopic rod, and the side of the movable disk away from the electric telescopic rod is splined to the wind turbine body, a side of the movable disk away from the electric telescopic rod is penetrated and fixedly connected with a first limit plate, a surface of the first limit plate is penetrated and rotatably connected with a swing plate, a side of the swing plate away from the first limit plate is penetrated and rotatably connected with a second limit plate, a side of the second limit plate is penetrated and fixedly connected with a scraping plate, and the scraping plate is slidably connected to the surface of the wind turbine body.

[0013] Preferably, three groups of the first limit plate, swing plate, second limit plate and scraper plate are respectively arranged along the center of the movable disk. The scraper plate is made of polyurethane and is arc-shaped near the connection with the wind power generation body.

[0014] Preferably, the liquid spraying structure includes a liquid storage tank, which is detachably mounted inside the shell, and a suction column is slidably connected inside the liquid storage tank, and the suction column is fixed on the side of the movable disk, and a polyurethane plate is movably connected to the outer ring surface of the movable disk.

[0015] Preferably, the interior of the polyurethane plate is attached to the swing plate, and a plurality of groups of liquid spray holes are provided inside the swing plate.

[0016] Preferably, the polyurethane plate is cylindrical and is made of carbon fiber.

[0017] Preferably, the diameter of the movable disk is slightly larger than the diameter of the shell, the first limit plate and the swing plate arranged on the side of the movable disk are both made of carbon fibers, and the scraper plate on the side of the swing plate away from the first limit plate is hollow inside.

[0018] Preferably, the liquid storage tank and the suction column are both cylindrical, and the diameter of the liquid storage tank is larger than the diameter of the suction column.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the device for removing ice from wind turbine blades, the scraper plate is driven to slide on the wind turbine body to remove ice through the movement of the movable disk and the swing of the swing plate. Since the movable disk and the wind turbine body are spline-connected, the scraper plate will rotate synchronously with the wind turbine body and remove ice even when the wind turbine body rotates, thereby avoiding the inability to completely remove ice when the wind turbine body rotates, which is beneficial to improving the effect of removing ice and simultaneously improving the power generation efficiency.

[0021] 2. In the device for removing ice from wind turbine blades, when the ice is removed by opening the ice scraping structure, since the swing plate will be close to the wind turbine body when it is opened to the maximum distance, the movable plate will drive the suction column to move inside the liquid storage tank and generate suction to spray the anti-icing chemical agent from the spray hole to contact the wind turbine body, and during the opening process of the swing plate, the polyurethane plate will be driven to form a cone to protect the agent sprayed from the spray hole from being blown away by the external wind, which is beneficial to improving the spraying effect of the spray hole.

[0022] 3. In the device for removing ice from the blades of a wind turbine, the scraper plate is driven to reset when the movable disk and the swing plate are reset, thereby protecting the connection between the blades and the impeller in the wind turbine body and forming an integral body with the blades, thereby reducing the resistance of the blades during normal use, and at the same time continuing to clean the ice on the surface of the wind turbine body, which is beneficial to prolonging the service life of the wind turbine body and improving the effect of cleaning ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0024] Figure 2 It is a split cross-sectional view of the wind turbine body and the scraper plate of the present invention;

[0025] Figure 3 It is a cutaway stereoscopic view of the overall structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the ice scraping and spraying structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the ice scraping structure of the present invention;

[0028] Figure 6 It is a cutaway stereoscopic view of the liquid spraying structure of the present invention;

[0029] Figure 7It is a schematic diagram of the motion state of the overall structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of removing the polyurethane plate of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 1. Wind power generation body; 2. Shell; 3. Sensor; 4. Electric telescopic rod; 500. Ice scraping structure; 501. Moving plate; 502. First limit plate; 503. Swinging plate; 504. Second limit plate; 505. Scraping plate; 506. Spray hole; 600. Spray structure; 601. Liquid storage tank; 602. Suction column; 603. Polyurethane plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] For the embodiments of the present invention, please refer to Figure 1-Figure 8 A process for preparing an anti-icing wind turbine blade comprises the following steps:

[0035] S1. First, the staff will assemble the blades and impellers in the wind turbine and ensure that they are not damaged and can be used normally;

[0036] S2, installing the ice scraping structure 500 and the liquid spraying structure 600 to the rear of the wind turbine body 1 respectively, and ensuring that the sensor 3 starts the electric telescopic rod 4 after sensing the ice, thereby completing the preparation of the wind turbine blades;

[0037] The wind power generation body 1 is provided with a sensor 3 inside, the side of the wind power generation body 1 is provided with an electric telescopic rod 4, the end of the electric telescopic rod 4 is fixedly connected with a shell 2, the wind power generation body 1 is provided with a shell 2 inside, the side of the wind power generation body 1 is provided with an ice scraping structure 500 for scraping ice, and the shell 2 is provided with a liquid spraying structure 600 for spraying anti-icing chemical agents;

[0038] The ice scraping structure 500 is opened to remove the ice, and at the same time, the liquid spraying structure 600 is driven to form a cone to protect the sprayed anti-icing chemical agent, and the rotation speed of the wind power generation body 1 is increased;

[0039] The present invention takes into account that it is difficult to remove ice from wind turbines using existing machinery because the wind turbine is in a rotating state when generating electricity. Even if the existing mechanical removal is to install a small electric vibrator inside the blade to make the ice fall off the blade surface by vibration, slight vibration may not be able to remove the ice. On the contrary, strong vibration will cause the balance of the blade to be unbalanced. If the ice on the blade cannot be completely scraped off, long-term adhesion will reduce the service life of the blade. If the balance of the blade changes, the power generation and rotation efficiency of the wind turbine may be reduced. Therefore, the moving disk 501 moves and the swinging plate 503 swings to drive the scraping plate 505 to slide on the wind turbine body 1 to remove the ice. Since the moving disk 501 and the wind turbine body 1 are splined, the scraping plate 505 will rotate synchronously with the wind turbine body 1 and remove the ice even when the wind turbine body 1 rotates, so as to avoid the wind turbine body 1 being unable to completely remove the ice when it rotates, which is beneficial to improving the effect of removing the ice and improving the power generation efficiency at the same time.

[0040] Considering that the external wind force is irregular, if the anti-icing chemical agent sprayed is easily blown away by the external wind force or cannot be completely covered on the blade surface, it will not only waste the agent resources, but also fail to give full play to the anti-icing effect of the agent. Therefore, when the ice is removed by opening the ice scraping structure 500, since the swing plate 503 is close to the wind power generation body 1 when it is opened to the maximum distance, the movable plate 501 will drive the suction column 602 to move inside the liquid storage tank 601 and generate suction to spray the anti-icing chemical agent from the spray hole 506 to contact the wind power generation body 1, and in the process of opening the swing plate 503, the polyurethane plate 603 will be driven to be conical to protect the agent sprayed from the spray hole 506 from being blown away by the external wind force, which is conducive to improving the spraying effect of the spray hole 506.

[0041] Furthermore, considering that the connection between the blades and the impeller of the wind power generation body 1 is prone to ice accumulation when it is used for a long time, the service life will be reduced if it is not protected. Therefore, when the movable plate 501 and the swing plate 503 are reset, the scraper plate 505 is driven to reset, and the connection between the blades and the impeller in the wind power generation body 1 is protected, and the scraper plate 505 is integrated with the blades to reduce the resistance of the blades during normal use. At the same time, the ice accumulation on the surface of the wind power generation body 1 can be continuously cleaned, which is beneficial to prolonging the service life of the wind power generation body 1 and improving the effect of cleaning ice accumulation.

[0042] As for the working principle of the electric telescopic rod 4, it is well known in the art that the electric cylinder can be started according to the input of the control signal, the rotational motion of the motor is converted into linear motion through the gear set, and the transmission rod is driven to move back and forth in the cylinder;

[0043] As for the working principle of the wind power generation body 1, it is well known in the technical field that the wind power generation body 1 uses the kinetic energy of wind to generate electrical energy. The wind turbine generator absorbs wind energy through the windmill blades, causing the blades to rotate, and then increases the rotation speed through the speed increaser, and finally drives the generator to generate electricity;

[0044] On the basis of the above, the following specific structures need to be disclosed in detail:

[0045] First, in order to remove the ice adhered to the shell 2, the following specific structure needs to be disclosed in detail, please refer to Figure 1-Figure 5 The ice scraping structure 500 includes a moving disk 501, a side of the moving disk 501 away from the wind power generation body 1 is fixedly connected to the output end of the electric telescopic rod 4, and a side of the moving disk 501 away from the electric telescopic rod 4 is spline-connected to the wind power generation body 1, and a first limiting plate 502 is fixedly connected through the side of the moving disk 501 away from the electric telescopic rod 4, and a swing plate 503 is rotatably connected through the surface of the first limiting plate 502, and a second limiting plate 504 is rotatably connected through the side of the swing plate 503 away from the first limiting plate 502, and a scraping plate 505 is fixedly connected through the side of the second limiting plate 504, and the scraping plate 505 is slidably connected to the surface of the wind power generation body 1;

[0046] The first limit plate 502, the swing plate 503, the second limit plate 504 and the scraper plate 505 are respectively arranged in three groups along the center of the movable plate 501. The scraper plate 505 is made of polyurethane. The scraper plate 505 is arranged in an arc shape near the connection part of the wind power generation body 1.

[0047] As for the ice scraping structure 500, three groups are provided, which are used to remove ice from the blades in the wind power generation body 1 respectively, which is beneficial to improving the efficiency of removing ice. The scraping plate 505 is made of polyurethane because polyurethane has multiple characteristics, mainly including thermal stability, chemical resistance, mechanical properties, sound insulation, heat insulation, waterproof, fire resistance, etc., so as to always maintain closeness with the blades in the wind power generation body 1 when removing ice. At the same time, the firmness of the scraping plate 505 does not affect the removal of ice adhered to the wind power generation body 1, which is beneficial to improving the effect of removing ice and reducing the resistance to the wind power generation body 1.

[0048] As for the scraper plate 505, the arc-shaped arrangement near the connection of the wind power generation body 1 is to better fit the impeller in the wind power generation body 1, which not only does not affect the subsequent removal of ice, but also can protect the connection of the wind power generation body 1 when not in use, which is beneficial to prolonging the service life of the wind power generation body 1;

[0049] When the sensor 3 senses that ice is adhered to the surface of the wind turbine body 1, the electric telescopic rod 4 will be started to work and drive the movable plate 501 to move toward the wind turbine body 1, and synchronously drive the three groups of first limit plates 502 to move. When the movable plate 501 and the first limit plate 502 move, the three groups of swing plates 503 will be driven to open outward. This is because the scraper plate 505 is sleeved on the surface of the blade of the wind turbine body 1. Therefore, the moving plate 501, the first limit plate 502 and the swing plate 503 cannot drive the second limit plate 504 and the scraper plate 505 to move linearly during the movement. When the swing plate 503 is resisted by the second limit plate 504, the swing plate 503 will rotate on the surface of the second limit plate 504, and drive the three groups of second limit plates 504 and scraper plates 505 to slide on the surface of the blade of the wind turbine body 1, so as to remove ice from the surface of the blade of the wind turbine body 1.

[0050] In order to spray anti-icing chemicals on the wind turbine body 1 after clearing ice, the following specific structure needs to be disclosed in detail, please refer to Figure 1-Figure 7 The liquid spraying structure 600 includes a liquid storage tank 601, which is detachably mounted inside the housing 2. A suction column 602 is slidably connected inside the liquid storage tank 601. The suction column 602 is fixed to the side of the movable plate 501 through the liquid storage tank 601. A polyurethane plate 603 is movably connected to the outer annular surface of the movable plate 501.

[0051] The inside of the polyurethane plate 603 is attached to the swing plate 503, and a plurality of groups of liquid spray holes 506 are opened inside the swing plate 503;

[0052] In order to better realize the deformation of the polyurethane plate 603, the following specific structure needs to be disclosed in detail, please refer to Figure 3-Figure 6 , the polyurethane plate 603 is cylindrically arranged, and the polyurethane plate 603 is carbon fiber arranged;

[0053] As for the polyurethane plate 603, carbon fiber is provided because it has the characteristics of lightness, high temperature resistance, friction resistance, heat conduction and corrosion resistance, and the appearance is fibrous, soft, and can be processed into various fabrics. The lightness is to reduce the resistance of the wind power generation body 1 during movement and prevent the wind power generation body 1 from rotating. The softness is to make the polyurethane plate 603 deform better and contact the external wind force, which is conducive to improving the wind power generation body 1 to collect electricity.

[0054] As for the plurality of groups of spray holes 506 opened inside the swing plate 503, the purpose is to better cover the sprayed anti-icing chemical agent on the surface of the blades of the shell 2, which is beneficial to improve the spraying effect of the spray holes 506 and reduce the re-generation of ice on the blades of the wind power generation body 1;

[0055] When the movable plate 501 moves toward the wind power generation body 1, the suction column 602 will be synchronously driven to move inside the liquid storage tank 601, so that the anti-icing chemical agent inside the liquid storage tank 601 is drained from the suction force generated by the suction column 602 to the movable plate 501 and the first limit plate 502, and then drained to the swing plate 503, and sprayed from the liquid spray hole 506 to the surface of the blades of the wind power generation body 1. At the same time, because the scraper plate 505 has moved the maximum distance on the surface of the blades of the wind power generation body 1, the anti-icing chemical agent sprayed from the liquid spray hole 506 will cover the surface of the blades of the wind power generation body 1, thereby reducing the re-appearance of ice on the blades of the wind power generation body 1. When the moving plate 501 moves to drive the swing plate 503 to expand outward, the polyurethane plate 603 will also be deformed into a cone shape. This is partly to block the anti-icing chemical agent sprayed from the liquid spray hole 506 to prevent the external wind from blowing the sprayed anti-icing chemical agent away and preventing it from sticking to the surface of the blade of the wind power generation body 1. It is also partly to allow the external wind to blow on the surface of the polyurethane plate 603. When the polyurethane plate 603 is deformed into a cone shape, the contact area will also increase, thereby better driving the rotation of the wind power generation body 1, which is conducive to improving the effect of the liquid spray hole 506 spraying the anti-icing chemical agent, and at the same time increasing the power collected by the rotation of the wind power generation body 1.

[0056] In order to better realize the scraping plate 505 to scrape ice off the wind power generation body 1, it is necessary to disclose the following specific structure in detail, please refer to Figure 1-Figure 5 The diameter of the movable plate 501 is slightly larger than the diameter of the housing 2. The first limit plate 502 and the swing plate 503 provided on the side of the movable plate 501 are both made of carbon fiber. The scraping plate 505 on the side of the swing plate 503 away from the first limit plate 502 is hollow inside.

[0057] After the scraper plate 505 scrapes off the ice, the movable plate 501 is reset to drive each group of the first limit plate 502, the swing plate 503, the second limit plate 504 and the scraper plate 505 to reset and move on the outer annular surface of the wind power generation body 1. The scraper plate 505 can not only spray the sticky anti-icing chemical agent on the wind power generation body 1 to scrape and tightly cover the blades of the wind power generation body 1 when resetting, but also protect the connection between the blades and the impeller in the wind power generation body 1 when the scraper plate 505 is reset to the final position, and does not hinder the normal rotation of the wind power generation body 1, which is conducive to improving the service life of the wind power generation body 1;

[0058] In order to better realize the spraying of anti-icing chemical agents on the blades of the wind power generation body 1, the following specific structure needs to be disclosed in detail, please refer to Figure 4-Figure 6 The liquid storage tank 601 and the suction column 602 are both cylindrical, and the diameter of the liquid storage tank 601 is larger than the diameter of the suction column 602.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for preparing an anti-icing wind turbine blade, characterized in that: The following steps are involved: S1. First, the staff will assemble the blades and impellers in the wind turbine and ensure that they are not damaged and can be used normally; S2, installing the ice scraping structure (500) and the liquid spraying structure (600) to the rear of the wind turbine generator body (1), respectively, and ensuring that the sensor (3) starts the electric telescopic rod (4) after sensing the ice, thereby completing the preparation of the wind turbine blades; The wind power generation body (1) is provided with a sensor (3) inside, the wind power generation body (1) is provided with an electric telescopic rod (4) on the side, the end of the electric telescopic rod (4) is fixedly connected to a shell (2), the wind power generation body (1) is provided with a shell (2), the wind power generation body (1) is provided with an ice scraping structure (500) for scraping ice, and the shell (2) is provided with a liquid spraying structure (600) for spraying an anti-icing chemical agent. The ice scraping structure (500) is opened to remove ice, and at the same time the liquid spraying structure (600) is driven to form a cone to protect the sprayed anti-icing chemical agent, and the rotation speed of the wind power generation body (1) is increased.

2. The anti-icing wind turbine blade according to claim 1, characterized in that: The ice scraping structure (500) comprises a moving disk (501), a side of the moving disk (501) away from the wind power generation body (1) being fixedly connected to the output end of the electric telescopic rod (4), a side of the moving disk (501) away from the electric telescopic rod (4) being spline-connected to the wind power generation body (1), a first limit plate (502) being fixedly connected through the side of the moving disk (501) away from the electric telescopic rod (4), a swing plate (503) being rotatably connected through the surface of the first limit plate (502), a second limit plate (504) being rotatably connected through the side of the swing plate (503) away from the first limit plate (502), a scraping plate (505) being fixedly connected through the side of the second limit plate (504), and the scraping plate (505) being slidably connected to the surface of the wind power generation body (1).

3. The anti-icing wind turbine blade according to claim 2, characterized in that: The first limiting plate (502), the swinging plate (503), the second limiting plate (504) and the scraping plate (505) are respectively arranged in three groups along the center of the movable plate (501); the scraping plate (505) is made of polyurethane material; and the scraping plate (505) is arranged in an arc shape near the connection with the wind power generation body (1).

4. The anti-icing wind turbine blade according to claim 1, characterized in that: The liquid spraying structure (600) comprises a liquid storage tank (601), the liquid storage tank (601) being detachably mounted inside the housing (2), a suction column (602) being slidably connected inside the liquid storage tank (601), the suction column (602) being fixed through the side of the movable disk (501), and a polyurethane plate (603) being movably connected to the outer annular surface of the movable disk (501).

5. The anti-icing wind turbine blade according to claim 4, characterized in that: The interior of the polyurethane plate (603) is attached to the swing plate (503), and a plurality of groups of liquid spray holes (506) are provided inside the swing plate (503).

6. The anti-icing wind turbine blade according to claim 4, characterized in that: The polyurethane plate (603) is cylindrical and is made of carbon fiber.

7. The anti-icing wind turbine blade according to claim 2, characterized in that: The diameter of the movable disk (501) is slightly larger than the diameter of the housing (2); the first limiting plate (502) and the swinging plate (503) arranged on the side of the movable disk (501) are both made of carbon fibers; and the scraping plate (505) on the side of the swinging plate (503) away from the first limiting plate (502) is hollow inside.

8. The anti-icing wind turbine blade according to claim 4, characterized in that: The liquid storage tank (601) and the suction column (602) are both cylindrical, and the diameter of the liquid storage tank (601) is greater than the diameter of the suction column (602).

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