A profiling device for the blade of a wind turbine generator

Abstract

The present invention discloses a profiling device for a wind turbine blade, which includes a light emitter, a first beam splitter and its supporting first optical transmission tube, a second beam splitter and its supporting second optical transmission tube; the light emitter is installed inside the hub, the first and second beam splitters are arranged in the trailing edge area of the tip section and are respectively fixed on the shells of the SS and PS surfaces of the blade, the first optical transmission tube is fixed on the midline or near the midline of the trailing edge web and gradually converges to the shell of the SS surface of the blade at both the tip and root ends, the second optical transmission tube is fixed on the shell of the PS surface of the blade and is located in the area from the trailing edge web towards the trailing edge, one ends of the first and second optical transmission tubes are respectively connected to the corresponding light output ports of the light emitter, and the other ends are respectively connected to the light input ports of the first and second beam splitters. The present invention can minimize the installation risk and ensure the operation of the profiling device without affecting the service life of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of the outline indication of wind turbine generators, and in particular to an outline indication device for the blades of a wind turbine generator. Background Art

[0002] According to international civil aviation standards, objects reaching a certain height need to be outlined at night. Since wind turbines have been increasing in number and height in recent years, it is necessary to outline them at night. According to the new standard, it is necessary to indicate the height and width of the impeller (including the hub and blades) with a tip height higher than 150m. Currently, the large-power blades installed in batches all exceed this height. Therefore, outline lights need to be installed at the tip position. This position is in the tip area, and on the premise of ensuring that it does not affect the structural strength, lightning protection, waterproofing and other functions, it should be arranged as close to the tip position as possible to play the greatest warning role to prevent accidents of aircraft being shot down. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and propose an outline indication device for the blades of a wind turbine generator, which minimizes the installation risk and ensures the operation of the outline indication device without affecting the service life of the unit.

[0004] To achieve the above purpose, the technical solution provided by the present invention is: an outline indication device for the blades of a wind turbine generator. There are two webs extending side by side in the blade length direction inside the blade, namely the leading-edge web and the trailing-edge web; the outline indication device includes a light emitter, a first beam splitter and its supporting first light transmission tube, a second beam splitter and its supporting second light transmission tube; the light emitter is installed inside the hub of the wind turbine generator, the first beam splitter and the second beam splitter are arranged in the trailing-edge area of the blade tip section and are respectively fixed on the shells of the SS surface and the PS surface of the blade. The first light transmission tube is fixed on the midline or near the midline of the trailing-edge web and gradually approaches the shell of the SS surface of the blade at both the tip and root ends. One end of the first light transmission tube is connected to the first light outlet of the light emitter, and the other end is connected to the light inlet of the first beam splitter. The light emitted by the light emitter is transmitted to the first beam splitter through the first light transmission tube and finally emitted from the light-emitting surface of the first beam splitter to play a warning role; the second light transmission tube is fixed on the shell of the PS surface of the blade and is located in the area from the trailing-edge web to the trailing edge. One end of the second light transmission tube is connected to the second light outlet of the light emitter, and the other end is connected to the light inlet of the second beam splitter. The light emitted by the light emitter is transmitted to the second beam splitter through the second light transmission tube and finally emitted from the light-emitting surface of the second beam splitter to play a warning role.

[0005] Furthermore, the first optical splitter and the second optical splitter are solid bodies with the same structure. A first flange surface is formed on the side surface of the solid body. An incident light port is formed on the first flange surface and a plurality of optical fiber tube fixing holes are arranged. The top surface of the solid body is a light-emitting surface, that is, a light-emitting surface. The light-emitting surface is exposed outside the blade housing, and a second flange surface is formed by sinking around it. Silicone is coated on the second flange surface or a silicone gasket is used for sealing to prevent rainwater from entering the blade. A support arm extends out from each of the two sides of the solid body for connecting and fixing with the blade housing to enhance the fixing strength. And the support arms are located in the span direction of the blade to resist centrifugal force. A reflective coating is plated or a reflective material is pasted on the side surface and the bottom surface of the solid body to make as much light transmitted by the optical fiber tubes as possible emit from the light-emitting surface. A buffer is bonded to the bottom surface of the solid body to avoid rigid contact between the two optical splitters or rigid contact with the blade housing when the blade is clamped, thereby affecting the mutual compaction quality of the PS surface and the SS surface.

[0006] Furthermore, the light-emitting surface is coated with fluorescent powder or polished rough to increase the scattering brightness.

[0007] Furthermore, a high-transparency film is pasted on the light-emitting surface to reduce the erosion of rainwater and sand on the surface and avoid affecting its light transmittance.

[0008] Furthermore, the support arms are fixed on the blade housing by structural adhesive or cable ties.

[0009] Furthermore, the first optical splitter and the second optical splitter are staggeredly arranged to reduce the influence degree of the material fracture of their mounting holes on the cross-sectional stiffness.

[0010] Furthermore, the buffer is sponge.

[0011] Furthermore, the first optical fiber tube is fixed on the midline or near the midline of the trailing edge web by adhesive and fiberglass cloth.

[0012] Furthermore, the second optical fiber tube is fixed on the housing of the PS surface of the blade by adhesive and fiberglass cloth.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] 1. The device of the present invention is placed in the trailing edge area of the tip section to reduce the erosion of the light-emitting surface by rain erosion.

[0015] 2. The device of the present invention adopts two optical splitters, with high assembly precision (the assembly precision of an integrated type is difficult to control) and safer structure.

[0016] 3. The beam splitter of the device of the present invention is coated with a reflective coating or pasted with a reflective material (such as silver or white structural adhesive, etc.) on all surfaces except the light-emitting surface to reduce light loss. Fluorescent powder can also be coated on the light-emitting surface or the surface can be polished rough to increase the scattering brightness of the light-emitting surface, enabling the aircraft to detect the blade, avoid obstacles in time, and reduce the risk of accidents.

[0017] 3. A highly transparent film can be pasted on the light-emitting surface of the device of the present invention to reduce the erosion of the surface by rain, sand, etc., and avoid affecting its light transmittance.

[0018] 4. Two support arms protrude from the beam splitter of the device of the present invention for connecting and fixing to the blade housing to enhance the fixing strength. The support arms are located in the span direction of the blade and can resist a large centrifugal force.

[0019] 5. Due to the large flapping displacement of the blade, the first optical transmission tube of the device of the present invention is routed along the midline or near the midline of the trailing edge web, and the second optical transmission tube is routed along the housing of the PS surface of the blade and is located in the area from the trailing edge web to the trailing edge direction, which can effectively reduce the risk of fatigue and strength failure caused by large strains generated in the optical transmission tube during blade deformation.

[0020] 6. The two beam splitters of the present invention can be staggeredly arranged, thereby reducing the influence degree of the material fracture of their mounting holes on the cross-sectional stiffness. A buffer member (such as sponge) is bonded to the bottom surface of each beam splitter, which can effectively prevent the two beam splitters from rigidly contacting the blade housing when the blade is clamped, thereby affecting the mutual compaction quality of the PS surface and the SS surface. Description of the Drawings

[0021] Figure 1 Schematic diagram of a wind turbine blade with a profile device.

[0022] Figure 2 is Figure 1 Local enlarged view A of

[0023] Figure 3 One of the schematic diagrams of the profile device on the blade housing.

[0024] Figure 4 is Figure 3 Local enlarged view B of

[0025] Figure 5 Another schematic diagram of the profile device on the blade housing.

[0026] Figure 6 is Figure 5 Local enlarged view C of

[0027] Figure 7 Schematic diagram of the structure of the beam splitter. Detailed Embodiment

[0028] The present invention will be further described below in conjunction with specific embodiments.

[0029] Referring to Figures 1 to 6 As shown, this embodiment provides a profiling device for the blades of a wind turbine generator, including a light emitter 1, a first beam splitter 2 and its supporting first light transmission tube 3, a second beam splitter 4 and its supporting second light transmission tube 5; the light emitter 1 is installed inside the hub of the wind turbine generator (not shown in the figure). Since the leading edge 6 of the blade is easily affected by rain erosion, the first beam splitter 2 and the second beam splitter 4 are arranged in the trailing edge 7 area of the blade tip section and are respectively fixed on the shells of the SS surface 8 and the PS surface 9 of the blade. The first light transmission tube 3 is fixed on the midline or near the midline of the trailing edge web 12 (there are two webs extending side by side in the blade length direction inside the blade, namely the leading edge web 13 and the trailing edge web 12) through an adhesive 10 and a fiberglass cloth 11, and gradually approaches the shell of the SS surface 8 of the blade at both the tip and the root ends. One end of the first light transmission tube 3 is connected to the first light outlet of the light emitter 1, and the other end is connected to the light inlet of the first beam splitter 2. The light emitted by the light emitter 1 is transmitted to the first beam splitter 2 through the first light transmission tube 3 and finally emitted from the light emitting surface of the first beam splitter 2 to play a warning role; the second light transmission tube 5 is fixed on the shell of the PS surface 9 of the blade through an adhesive 14 and a fiberglass cloth 15 and is located in the area from the trailing edge web 8 towards the trailing edge 7. One end of the second light transmission tube 5 is connected to the second light outlet of the light emitter 1, and the other end is connected to the light inlet of the second beam splitter 4. The light emitted by the light emitter 1 is transmitted to the second beam splitter 4 through the second light transmission tube 5 and finally emitted from the light emitting surface of the second beam splitter 4 to play a warning role.

[0030] Referring to Figure 7 As shown, the first beam splitter 2 and the second beam splitter 4 are solid bodies with the same structure. A first flange surface 17 is formed on the side surface 16 of the solid body. An inlet port 18 and a plurality of light transmission tube fixing holes 19 are provided on the first flange surface 17. The top surface of the solid body is the light emitting surface 21, that is, the light emitting surface. The light emitting surface 21 is exposed outside the blade shell, and a second flange surface 22 is formed by sinking around it. Silicone 23 is applied on the second flange surface 22 (see Figure 1Shown in the figure) or sealed with a silicone pad to prevent rainwater from entering the interior of the blade. On both sides of the solid body, an arm 24 extends outward respectively for connection and fixation with the blade housing (specifically fixed on the blade housing through structural adhesive or cable ties), enhancing the fixation strength. And the arm 24 is located in the span direction of the blade to resist a large centrifugal force. The side surface 16 and the bottom surface 25 of the solid body are coated with a reflective coating or pasted with a reflective material, so that as much light transmitted by the light transmission pipe is emitted from the light-emitting surface 21 as possible, reducing losses. A buffer member 26 (preferably sponge) is bonded to the bottom surface 25 of the solid body, and a high-transparency film can be pasted on the light-emitting surface to reduce the erosion of rainwater, sand and the like on the surface and avoid affecting its light transmittance. By bonding the buffer member 26, the rigid contact between the two beam splitters or the rigid contact with the blade housing during blade mold closing can be effectively avoided, thereby affecting the mutual compaction quality of the PS surface 9 and the SS surface 8. Of course, the two beam splitters can also be placed staggeredly, which can reduce the influence degree of the material fracture of the installation holes of the two beam splitters on the cross-sectional stiffness while avoiding the mutual contact of the two beam splitters during blade mold closing.

[0031] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A profiling device for a wind turbine blade, wherein there are two webs extending side by side in the blade length direction inside the blade, namely a leading edge web and a trailing edge web; characterized in that: The contour indicating device includes a light emitter, a first beam splitter and its supporting first optical transmission tube, a second beam splitter and its supporting second optical transmission tube; the light emitter is installed inside the hub of the wind turbine generator, the first beam splitter and the second beam splitter are arranged in the trailing edge area of the blade tip section and are respectively fixed on the housings of the SS side and the PS side of the blade, the first optical transmission tube is fixed on the midline or near the midline of the trailing edge web and gradually converges to the housing of the SS side of the blade at both the tip and the root ends, one end of the first optical transmission tube is connected to the first light outlet of the light emitter, and the other end is connected to the light inlet of the first beam splitter, and the light emitted by the light emitter is transmitted to the first beam splitter through the first optical transmission tube and finally emitted from the light emitting surface of the first beam splitter to play a warning role; the second optical transmission tube is fixed on the housing of the PS side of the blade and is located in the area from the trailing edge web towards the trailing edge, one end of the second optical transmission tube is connected to the second light outlet of the light emitter, and the other end is connected to the light inlet of the second beam splitter, and the light emitted by the light emitter is transmitted to the second beam splitter through the second optical transmission tube and finally emitted from the light emitting surface of the second beam splitter to play a warning role; The first beam splitter and the second beam splitter are solid bodies with the same structure. A first flange surface is formed on the side surface of the solid body. A light inlet and a plurality of optical transmission tube fixing holes are arranged on the first flange surface. The top surface of the solid body is the light emitting surface, that is, the light emitting surface. The light emitting surface exposes the blade housing, and a second flange surface is formed by sinking around it. Silicone is coated or a silicone pad is used for sealing on the second flange surface to prevent rainwater from entering the blade interior. A support arm extends outwards from each of the two sides of the solid body for connecting and fixing with the blade housing to enhance the fixing strength, and the support arm is located in the span direction of the blade to resist the centrifugal force. The side surface and the bottom surface of the solid body are coated with a reflective coating or pasted with a reflective material to make as much light as possible transmitted by the optical transmission tube emitted from the light emitting surface. A buffer is bonded to the bottom surface of the solid body to avoid the rigid contact between the two beam splitters or the rigid contact with the blade housing during blade mold closing, thereby affecting the mutual compaction quality of the PS side and the SS side; The light emitting surface is coated with fluorescent powder or polished rough to increase the scattering brightness; A high-transparency film is pasted on the light emitting surface to reduce the erosion of rainwater and sand on the surface and avoid affecting its light transmittance; The support arm is fixed on the blade housing by structural adhesive or cable tie; The first beam splitter and the second beam splitter are staggeredly arranged to reduce the influence degree of the material fracture of their mounting holes on the cross-sectional stiffness; The first optical transmission tube is fixed on the midline or near the midline of the trailing edge web by adhesive and fiberglass cloth; The second optical transmission tube is fixed on the housing of the PS side of the blade by adhesive and fiberglass cloth.

2. The profile indicating device for a wind turbine blade according to claim 1, characterized in that: The buffer is sponge.

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