A wind turbine blade leading edge protection device with a spoiler structure and an installation method thereof

Abstract

The present invention discloses a wind turbine blade leading edge protection device with a spoiler structure, comprising a protection device body installed on both sides of the blade leading edge, the shape of the protection device body is the same as the shape of the blade leading edge, the protection device body is attached to the axial length of the blade leading edge, and the outer surface of the protection device body is provided with at least two protrusions. The present invention adopts a wind turbine blade leading edge protection device with a spoiler structure of the above structure, which can protect the blade leading edge from damage for a long time, prevent the occurrence of airflow stagnation, and allow a larger stall angle of attack, reduce airflow loss along the way, and increase power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind turbine blade leading edge protection device with a spoiler structure and an installation method thereof. Background Art

[0002] Generally, during the operation of wind turbine blades, the rotation speed of the local cross section increases linearly with the increase of blade length, resulting in a relatively large linear speed at the tip of the blade. At present, the mainstream blade tip running speed is about 85m / s, that is, 306km / h, which is about the same speed as the speed of high-speed rail. The relatively large speed will be eroded by particles in the air around the blade, including raindrops, hail, salt spray, sand and gravel, etc., which are the dominant factors causing damage to the leading edge of the blade. Other factors such as ultraviolet rays and moisture can also cause blade aging. When the leading edge of the blade tip is damaged, the gas flowing through will produce different separations according to the degree of damage. After the gas is separated, the suction force on the blade surface will be greatly reduced, resulting in power generation loss. In order to solve this problem, the industry generally adopts protective paint and protective film on the leading edge. Among them, the protective film has strict requirements on the construction process. It needs to be polished and cleaned with fine sandpaper before applying the film. The workload is very large, and even extremely small bubbles are not allowed. In addition, the transportation and storage of the protective film are also very difficult. It is easy to be damaged during transportation and lifting. During the operation of the blades, blistering, edge curling, weathering and displacement of the protective film at the blade tip often occur. The general service life of the protective film is 4-5 years, and the cost of replacement in the later stage is higher. Summary of the invention

[0003] The purpose of the present invention is to provide a wind turbine blade leading edge protection device with a spoiler structure and an installation method, which can protect the leading edge of the blade from damage for a long time, prevent the occurrence of airflow stagnation, allow a larger stall angle, reduce airflow losses along the way, and increase power generation.

[0004] To achieve the above-mentioned objectives, the present invention provides a wind turbine blade leading edge protection device with a spoiler structure, comprising a protection device body installed on both sides of the blade leading edge, the shape of the protection device body is the same as the shape of the blade leading edge, the protection device body is adhered to the axial length of the blade leading edge, and the outer surface of the protection device body is set to at least two protrusions.

[0005] Preferably, the material of the protection device body is one of ABS, PP, ASA, PPS, PU, ​​polyester and polypropylene.

[0006] Preferably, the protrusion is configured to be one of an ellipse, a triangle, and a quasi-triangle shape.

[0007] Preferably, the length of the protection device body is less than 500 mm.

[0008] Preferably, the length of the protection device body is 200 mm.

[0009] A method for installing a wind turbine blade leading edge protection device with a spoiler structure comprises the following steps:

[0010] (1) According to the needs, find the area where the blade cross-section running speed is greater than 60m / s at the rated speed;

[0011] (2) According to the width of the device, use a marker to mark the position where the installation is required on the leading edge of the blade as the positioning line, that is, one positioning line on the suction side and one positioning line on the pressure side;

[0012] (3) Glue masking tape along the positioning line, one on the suction side and one on the pressure side. The front edge of the masking tape should be aligned with the positioning line and should not cover the area where the device is installed.

[0013] (4) Use a grinder or 120-grit sandpaper to sand the area between the masking tapes at the front edge to remove the paint surface. After sanding the surface with fiber cloth to form a rough surface, use a rag to remove dust, then use isopropyl alcohol to clean the sanded area and wipe it clean with a dry rag.

[0014] (5) Mix the glue and apply it on the leading edge of the blade. Install the devices on the leading edge of the blade one by one, with a gap of 1-3 mm between the devices.

[0015] Therefore, the present invention adopts the above-mentioned structure of a wind turbine blade leading edge protection device with a spoiler structure and an installation method, which can protect the leading edge of the blade from damage for a long time, prevent the occurrence of airflow stagnation, and allow a larger stall angle of attack, reduce airflow losses along the way, and increase power generation.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0018] Figure 2 It is a front view of an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0019] Figure 3 A schematic diagram of a semicircular protrusion of an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0020] Figure 4 A schematic diagram of an obtuse triangle protrusion of an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0021] Figure 5 A schematic diagram of an acute-angled triangle protrusion of an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0022] Figure 6 A schematic diagram of a triangular protrusion in accordance with an embodiment of a wind turbine blade leading edge protection device with a spoiler structure and an installation method of the present invention;

[0023] Figure 7 A schematic diagram of a leading edge of a wind turbine blade with a spoiler structure and an installation method according to an embodiment of the present invention, in which the leading edge mold seams are asymmetrically distributed on both sides of the leading edge of the blade;

[0024] Figure 8 It is a schematic diagram of a leading edge of a wind turbine blade with a spoiler structure and an embodiment of an installation method thereof according to the present invention, in which the protrusion does not cover the leading edge mold seam of the blade;

[0025] Fig. 9 The present invention is a schematic diagram of the installation of a wind turbine blade leading edge protection device with a spoiler structure and an installation method embodiment. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0027] Example

[0028] The present invention provides a wind turbine blade leading edge protection device with a spoiler structure, comprising a protection device body 2 installed on both sides of the blade leading edge 1, the shape of the protection device body 2 is the same as the shape of the blade leading edge 1, the protection device body 2 is pasted on the axial length of the blade leading edge 1, and the outer surface of the protection device body 2 is set to at least two protrusions 3. The material of the protection device body 2 is one of ABS, PP, ASA, PPS, PU, ​​polyester and polypropylene. In order to avoid using metal products to attract lightning, high-strength plastic products that are resistant to wind, sand and ultraviolet rays are used. The length of the protection device body 2 is less than 500mm. The best length is 200mm, and it is installed through multiple protection device bodies. The main body of the protective device is located at the leading edge of the blade, especially at the mold seam of the leading edge of the blade. Generally, the leading edge mold seam 4 is the leading edge of the blade. The protective device is located near the tip of the blade. The tip of the blade has a high speed when running. The particles that collide at high speed will damage the two collision structures. In particular, the speed of the tip of the blade is greater than 60m / s when running at the rated wind speed. This speed is greater than 200km / h, so 60m / s can also be considered as a speed demarcation point, that is, the protective device can be installed at a position where the speed is greater than 60m / s. For most blades, their structure is formed by bonding the suction surface and the pressure surface, so there is a mold seam for filling the structural glue. When the leading edge of the blade is damaged due to excessive speed, the leading edge mold seam has the worst damage due to its poor wind and sand resistance performance, so our protective device needs to cover this area, but the raised part may not cover the leading edge mold seam. In order to better match the leading edge of the blade, the protective device can be set to be asymmetrical, and the raised position may not be on the leading edge mold seam, in order to reduce the fitting range of the protective device and the blade.

[0029] The protrusion 3 is set to be one of an ellipse, a triangle, and a quasi-triangle. Among them, the ellipse is relatively stable and the influence on the tip of the original blade is also within a controllable range.

[0030] A method for installing a wind turbine blade leading edge protection device with a spoiler structure comprises the following steps:

[0031] (1) According to the needs, find the area where the blade cross-section running speed is greater than 60m / s at the rated speed.

[0032] (2) Based on the width of the device, use a marker to mark the location where the device needs to be installed on the leading edge of the blade as the positioning line, i.e. one positioning line on the suction side and one positioning line on the pressure side.

[0033] (3) Glue masking tape along the positioning line, one on the suction side and one on the pressure side. The leading edge of the masking tape should be aligned with the positioning line and should not cover the area where the device is installed.

[0034] (4) Use a grinder or 120-grit sandpaper to sand the front edge area between the masking tapes to remove the paint surface. After sanding the surface with fiber cloth to form a rough surface, use a rag to remove dust, then use isopropyl ketone / alcohol to clean the sanded area and wipe it clean with a dry rag. It is strictly forbidden to touch the cleaned bonding surface with your hands to prevent stains from being left on the bonding surface.

[0035] (5) Mix the glue and apply it on the leading edge of the blade. Install the devices on the leading edge of the blade in turn. The gap between the devices is 1-3 mm to prevent interference during the operation of the blade.

[0036] Therefore, the present invention adopts the above-mentioned structure of a wind turbine blade leading edge protection device with a spoiler structure and an installation method, which can protect the leading edge of the blade from damage for a long time, prevent the occurrence of airflow stagnation, and allow a larger stall angle of attack, reduce airflow losses along the way, and increase power generation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A wind turbine blade leading edge protection device with a spoiler structure, characterized in that: It comprises a protection device body installed on both sides of the leading edge of the blade, the shape of the protection device body is the same as the shape of the leading edge of the blade, the protection device body is adhered to the axial length of the leading edge of the blade, and the outer surface of the protection device body is set with at least two protrusions; The material of the protective device body is one of ABS, PP, ASA, PPS, PU, ​​polyester and polypropylene; The protrusion is configured to be one of an ellipse, a triangle, and a quasi-triangle shape; The length of the protective device body is less than 500 mm; The length of the protective device body is 200 mm; The method for installing the wind turbine blade leading edge protection device with a spoiler structure comprises the following steps: (1) According to the needs, find the area where the blade cross-section running speed is greater than 60m / s at the rated speed; (2) According to the width of the device, use a marker to mark the position where the installation is required on the leading edge of the blade as the positioning line, that is, one positioning line on the suction side and one positioning line on the pressure side; (3) Glue masking tape along the positioning line, one on the suction side and one on the pressure side. The front edge of the masking tape should be aligned with the positioning line and should not cover the area where the device is installed. (4) Use a grinder or 120-grit sandpaper to sand the area between the masking tapes at the front edge to remove the paint surface. After sanding the surface with fiber cloth to form a rough surface, use a rag to remove dust, then use isopropyl alcohol to clean the sanded area and wipe it clean with a dry rag. (5) Mix the glue and apply it on the leading edge of the blade. Install the devices on the leading edge of the blade one by one, with a gap of 1-3 mm between the devices.

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