A debugging method of a wind power blade root punching support

Abstract

This invention relates to the field of wind turbine blade technology, specifically to a debugging method for a perforated bracket at the root of a wind turbine blade, comprising the following steps: S1: Matching the theoretical height H of the boom centerline L1 in the wind turbine blade perforation equipment; S2: Designing the airfoil plate of the perforation bracket at corresponding positions based on the airfoil profile at different locations along the length of the wind turbine blade; S3: Coarsely adjusting the position of the perforation bracket at each location, specifically, taking the length direction of the wind turbine blade as the Z-axis, the horizontal direction of the earth as the X-axis, and the vertical direction of the earth as the Y-axis, and sequentially coarsely adjusting the accuracy of the perforation bracket in the X-axis direction, Y-axis direction, and Z-axis direction at each location; S4: Finely adjusting the position of the perforation bracket at each location. This debugging method is simple and easy to operate, and can improve the interface quality at the blade root, ensuring the positional accuracy and flatness of the perforation at the blade root.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade technology, and specifically provides a method for debugging a wind turbine blade root perforated support. Background Technology

[0002] Wind power, as an important component of clean energy, has been widely applied in various fields, especially in areas lacking water, fuel, or with inconvenient transportation. As a renewable energy technology, wind power converts wind energy into electricity, significantly reducing the consumption of non-renewable energy sources. The localized utilization of wind power has garnered significant attention worldwide. Wind turbine blades, as the most fundamental and critical component of wind turbine generators, are crucial for ensuring the normal and stable operation of the generator. To improve the reliability of wind turbines and achieve better power generation efficiency, higher requirements are placed on the positioning, debugging, and processing of wind turbine blade components.

[0003] When wind turbine blades are mounted on the turbine, they are connected to the main unit interface via blade root connecting bolts. These blade root connecting bolts are typically... Figure 1 The diagram shows N identical bolts evenly distributed along the circumference (N typically ranges from 70 to 170). The installation of the blade root connection bolts requires pre-embedding positioning round nuts in the wind turbine blade. To pre-embed the round nuts, drilling operations are performed on the blade root of the wind turbine blade using a drilling equipment. The size of the drill hole is determined by the size of the drilling tool of the drilling equipment. However, the flatness of the blade root end face, the position of all holes, and the angle between the wind turbine blade's central axis and the blade root end face are determined by the relative position between the wind turbine blade's posture during the drilling process and the plane on which the drilling equipment boom travels one revolution. The posture of the wind turbine blade during the drilling process is determined by the drilling support.

[0004] Therefore, the positional accuracy of the wind turbine blade drilling bracket, an essential tool for drilling holes at the blade root, is crucial for controlling the flatness of the blade root end face and the precision of the blade root interface. To improve the reliability of wind turbine units, it is necessary to ensure the installation accuracy of the blade root connecting bolts, the drilling accuracy of the blade root, and the blade attitude during the drilling process. This requires positioning and debugging of relevant components, especially matching the blade profile and the precision of the drilling equipment. Therefore, designing a debugging method for the wind turbine blade root drilling bracket to ensure the wind turbine blade attitude, the positional accuracy and flatness of the blade root drilling, and the quality of the wind turbine blade interface is a pressing issue that needs to be addressed. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a method for adjusting the root drilling support of wind turbine blades. By adjusting multiple sets of drilling supports, the wind turbine blade attitude can be ensured, the central axis of the wind turbine blade can be aligned with the central axis of the drilling equipment, the positional accuracy and flatness of the root drilling of the wind turbine blade can be guaranteed, and the quality of the wind turbine blade can be improved.

[0006] The present invention provides a method for debugging a perforated bracket at the root of a wind turbine blade, which specifically includes the following steps: S1: Match the theoretical height H of the boom centerline L1 in the wind turbine blade drilling equipment; S2: Design the airfoil plate for the corresponding perforated bracket based on the airfoil profile at different positions along the length of the wind turbine blade; S3: Make coarse adjustments to the positions of the perforated brackets at each location. Specifically, set the length direction of the wind turbine blade as the Z-axis, the horizontal direction of the earth as the X-axis, and the vertical direction of the earth as the Y-axis. Make coarse adjustments to the X-axis, Y-axis, and Z-axis accuracy of the perforated brackets at each location in sequence. S4: Fine-tune the position of the perforated bracket at each location. Specifically, use laser tracking to scan the airfoil profile of each perforated bracket, and feed back the deviation of the X-axis, Y-axis and Z-axis coordinates of the corresponding perforated bracket based on the fitting result of the airfoil in the 3D model. Based on the feedback result, fine-tune the perforated bracket in the X-axis, Y-axis and Z-axis directions.

[0007] Furthermore, the theoretical height H of the boom centerline L1 in S1 is obtained by matching the following steps: S11: On-site rough positioning to determine the centerline L1 of the drilling equipment's boom; S12: Install a laser beam emitter and a light receiving plate at the center axis L1 of the boom of the drilling equipment at the coarse positioning point; S13: Mark four points at 0°, 90°, 180° and 270° on the light-receiving plate, and cross the four points to mark the intersection point A. S14: Use a laser tracker to locate the intersection on the light receiving plate, and shoot light in the opposite direction along the Z-axis to the boom of the drilling equipment, and mark it as point O. This point is the rotation center point of the boom in the drilling equipment. S15: Adjust the position of the laser beam emitter to point O, and adjust the emitted beam to pass through point A. At this time, the laser beam is the central axis L1 of the drilling equipment arm.

[0008] Furthermore, the design method for the airfoil plate of the corresponding perforated bracket in S2 is as follows: S21: Assign H to the height of the central axis of the three-dimensional airfoil model of the wind turbine blade attitude, cut out the blade cross-section at each corresponding perforated support position, and mark the position of the blade central axis L2 in the blade cross-section. S22: Using the same 0m height as the main body of the drilling equipment as the reference plane M, and the SS surface airfoil outline of the blade profile as the contact surface arc, design drilling brackets with different cross sections.

[0009] Furthermore, before making coarse adjustments to the positions of the drilling brackets at each location in S3, it is necessary to first use a level to project the central axis L1 of the boom onto the ground and mark it as a straight line L3; then install each drilling bracket based on the straight line L3.

[0010] Furthermore, the method for coarsely adjusting the X-axis accuracy of the punched bracket at various positions in S3 is as follows: S311: Use a level to project the boom centerline L1 onto the airfoil plate of the perforated bracket; S312: Adjust the position of the punching bracket so that the blade centerline L2 in the three-dimensional airfoil model of the blade attitude is collinear with the boom centerline L1; complete the coarse adjustment of the punching bracket's accuracy in the X-axis direction.

[0011] Furthermore, the method for coarsely adjusting the Y-axis accuracy of the punched bracket at various positions in S3 is as follows: S321: Taking the reference plane M as the standard, mark the height of the leading edge of the airfoil of each perforated bracket as H1, the height of the trailing edge of the airfoil as H2, and the height of the blade centerline L2 as H0. S322: Adjust the height of the leading edge, trailing edge, and blade centerline L2 of each perforated bracket so that H1, H2, and H0 meet the height requirements of the leading edge, trailing edge, and centerline of the airfoil in the perforated bracket design drawings; complete the coarse adjustment of the perforated bracket's accuracy in the Y-axis direction.

[0012] Furthermore, the method for coarsely adjusting the Z-axis accuracy of the punched bracket at various positions in S3 is as follows: S331: Rotate the boom 360°, scan the rotation path and central axis with a laser tracker, and transfer the rotation path and central axis to the three-dimensional model of the blade attitude via target ball fitting; S332: In the 3D model, the face containing the rotation path coincides with the face containing the blade root, and the midpoint of the rotation path coincides with the midpoint of the blade root; the rotation path is a perfect circle. S333: Define the surface where the rotation path coincides with the surface where the blade root is located as the coincident surface. Adjust the distance between each perforation bracket and the coincident surface in the Z direction so that the distance between each perforation bracket and the coincident surface in the Z direction meets the design requirements of the perforation bracket design position.

[0013] Furthermore, the light receiver in S12 is positioned 15-20m away from the laser beam emitter.

[0014] Furthermore, when installing each drilling bracket in S3, the number of drilling brackets is greater than 5 groups, and the distance between each group of drilling brackets is 10m-20m.

[0015] Furthermore, when S322 coarsely adjusts the accuracy of the Y-axis direction of the punch bracket, H1, H2, and H0 should be adjusted to a state where the deviation between them and the design values ​​in the punch bracket design drawings is less than 5mm.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: The debugging method of the present invention ensures that the central axis of the wind turbine blade is coaxial with the central axis of the drilling machine boom by adjusting the position of the drilling bracket. By knowing the central axis of the drilling machine boom and the blade posture of the wind turbine blade, drilling brackets with different cross-sectional positions are designed. During on-site installation, the spatial positional accuracy of the wind turbine blade drilling bracket is adjusted by using a laser emitter, level and laser tracker. This debugging method is simple and easy to operate, can ensure the interface quality of the wind turbine blade root, ensure the flatness of the blade root and the positional accuracy of the hole, and has strong versatility, which can be applied to the needs of various specifications of wind turbine blades. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar structure of the blade root of a wind turbine blade provided in the embodiments of the present invention and the prior art, wherein point B is the bolt hole for connecting the blade root; Figure 2 This is a schematic diagram of the overall structure of the drilling device and the wind turbine blade provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a drilling device provided according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the punch bracket provided according to an embodiment of the present invention. Figure 1 (where C is the projection of the blade's central axis onto the airfoil). Figure 5 This is a schematic diagram of the structure of the punch bracket provided according to an embodiment of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of four marker points on a light-receiving plate provided according to an embodiment of the present invention.

[0018] The reference numerals in the figures include: blade profile Figure 1 1. Base 2. Boom 3. Drilling bracket 4. Airfoil 5. Wind turbine blade 6. Drilling equipment 7. Detailed Implementation

[0019] The appendix will be referenced below. Figure 1-6 Embodiments of the present invention are described below. In the following description, the same modules are denoted by the same reference numerals. Where the same reference numerals are used, their names and functions are also the same. Therefore, their detailed description will not be repeated.

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-6 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof.

[0021] A method for debugging a perforated bracket at the root of a wind turbine blade includes the following steps: S1: Match the theoretical height H of the boom centerline L1 in the drilling equipment 7 for wind turbine blades 6. The theoretical height H of the boom centerline L1 is obtained by matching through the following steps: S11: On-site rough positioning to determine the center axis L1 of the boom of the drilling equipment 7.

[0022] S12: Install a laser beam emitter and a light receiving plate at the center axis L1 of the boom of the drilling equipment 7 at the coarse positioning point. The light receiving plate should be positioned 15-20m away from the laser beam emitter to receive the light. S13: Mark four points at 0°, 90°, 180°, and 270° on the light-gathering plate, such as... Figure 6 As shown, connect the four marked points crosswise and mark the intersection point A after connecting them; S14: Use a laser tracker to locate the intersection on the light receiving plate, and shoot light in the opposite direction along the Z-axis to the arm 3 of the drilling device 7, and mark it as point O. This point is the rotation center point of the arm 3 in the drilling device 7. S15: Adjust the position of the laser beam emitter to point O, and adjust the emitted beam to pass through point A. At this time, the laser beam is the central axis L1 of the arm of the drilling equipment 7.

[0023] S2: Based on the airfoil profile at different positions along the length of the wind turbine blade 6, design the airfoil plate 5 for the corresponding perforated support 4. The design method for the airfoil plate 5 of the corresponding perforated support 4 is as follows: S21: Assign H to the centerline height of the 3D airfoil model of the wind turbine blade 6, and cut out the blade cross-sections at the corresponding positions of the perforated brackets 4. Figure 1 Mark the blade profile Figure 1 The position of the blade's central axis L2; S22: Using the same 0m height as the main body of the drilling equipment 7 as the reference plane M, and the blade profile Figure 1 The SS-face airfoil profile is designed with different cross-sections for the perforated bracket 4, based on the arc design of the contact surface. For example... Figure 3As shown, the drilling device 7 includes a base 2, on which a drilling unit, a milling unit and a boom 3 located in the middle are provided.

[0024] S3: Make coarse adjustments to the positions of the perforated brackets 4 at each location. Specifically, set the length direction of the wind turbine blade 6 as the Z-axis, the horizontal direction of the earth as the X-axis, and the vertical direction of the earth as the Y-axis. Make coarse adjustments to the X-axis, Y-axis, and Z-axis accuracy of the perforated brackets 4 at each location in sequence.

[0025] Before making rough adjustments to the positions of the perforated brackets 4 at each location, the central axis L1 of the boom must be projected onto the ground using a level and marked as a straight line L3. Then, each perforated bracket 4 is installed with the straight line L3 as the reference. The number of perforated brackets 4 is greater than 5 groups, and the distance between each group of perforated brackets 4 is 10m-20m.

[0026] The method for coarsely adjusting the X-axis accuracy of the perforated bracket 4 at various positions in S3 is as follows: S311: Use a level to project the boom centerline L1 onto the airfoil plate 5 of the perforated bracket 4; S312: Adjust the position of the punching bracket 4 so that the blade centerline L2 in the three-dimensional airfoil model of the blade attitude is collinear with the boom centerline L1, thus completing the coarse adjustment of the accuracy of the punching bracket 4 in the X-axis direction.

[0027] The method for coarsely adjusting the Y-axis accuracy of the perforated bracket 4 at various positions in S3 is as follows: S321: As Figure 5 As shown, with reference plane M, the height of the leading edge of the airfoil 5 of each perforated bracket 4 is marked as H1, the height of the trailing edge of the airfoil 5 is marked as H2, and the height of the blade centerline L2 is marked as H0. Figure 5 As shown, point C is the projection of the blade's central axis L2 onto the airfoil 5. Figure 5 In the diagram, L2 represents the position of the simulated blade centerline in virtual space. The height H0 of the blade centerline L2 is defined by the highest point of its projection C onto the airfoil 5. Figure 5 In the diagram, H0 represents the distance between the highest point of projection C and the reference plane M.

[0028] S322: Adjust the height of the leading edge, trailing edge, and blade centerline L2 of the airfoil 5 of each perforated bracket 4 so that H1, H2, and H0 meet the height requirements of the leading edge, trailing edge, and centerline of the airfoil 5 in the design drawings of the perforated bracket 4; complete the coarse adjustment of the accuracy of the perforated bracket 4 in the Y-axis direction. When coarsely adjusting the accuracy of the perforated bracket 4 in the Y-axis direction, H1, H2, and H0 should be adjusted to a state where the deviation between them and the design values ​​in the design drawings of the perforated bracket 4 is less than 5mm.

[0029] The method for coarsely adjusting the Z-axis accuracy of the perforated bracket 4 at various positions in S3 is as follows: S331: The boom 3 is rotated 360°, and the rotation path and central axis are scanned by a laser tracker. The rotation path and central axis are then transferred to the 3D model of the blade attitude via a target ball. Specifically, the target ball is installed at the milling unit of the drilling equipment. As the boom 3 rotates 360°, the laser tracker scans the rotation path of the target ball, which is then received by the target ball and transferred to the computer model.

[0030] S332: In the 3D model, make the face where the rotation path is located coincide with the face where the blade root is located, and make the midpoint of the rotation path coincide with the midpoint of the blade root; the rotation path is a perfect circle, that is, make the perfect circle coincide with the end face of the blade root and be concentric.

[0031] S333: Define the surface where the rotation path coincides with the surface where the blade root is located as the coincident surface. Adjust the distance between each perforation bracket 4 and the coincident surface in the Z direction so that the distance between each perforation bracket 4 and the coincident surface in the Z direction meets the design requirements of the perforation bracket 4 design position.

[0032] S4: Fine-tune the position of the perforated bracket 4 at each location. Specifically, use laser tracking to scan the contour of the airfoil 5 of the perforated bracket 4 one by one. Based on the fitting result of the airfoil 5 in the three-dimensional model, feed back the deviation of the X-axis, Y-axis and Z-axis coordinates of the corresponding perforated bracket. Based on the feedback result, fine-tune the perforated bracket 4 in the X-axis direction, Y-axis direction and Z-axis direction.

[0033] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0034] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for debugging a perforated bracket at the root of a wind turbine blade, characterized in that, Includes the following steps: S1: Match the theoretical height H of the central axis L1 of the boom of the wind turbine blade (6) drilling equipment (7); The theoretical height H of the boom centerline L1 in S1 is obtained by matching the following steps: S11: On-site rough positioning to determine the boom centerline L1 of the drilling equipment (7); S12: Install a laser beam emitter and a light receiving plate at the center axis L1 of the boom of the drilling equipment (7) at the coarse positioning point; S13: Mark four points at 0°, 90°, 180° and 270° on the light-receiving plate, and cross the four points to mark the intersection point A. S14: Use a laser tracker to locate the intersection on the light receiving plate, and shoot light in the opposite direction along the Z-axis to the arm (3) of the drilling equipment (7), and mark it as point O. This point is the rotation center point of the arm (3) in the drilling equipment (7). S15: Adjust the position of the laser beam emitter to point O, and adjust the emitted beam to pass through point A. At this time, the laser beam is the central axis L1 of the arm of the drilling equipment (7). S2: Based on the airfoil profile of the wind turbine blade (6) at different positions along its length, design the corresponding perforated bracket (4) airfoil plate (5); S3: Make coarse adjustments to the position of the perforated bracket (4) at each location. Specifically, set the length direction of the wind turbine blade (6) as the Z-axis, the horizontal direction of the earth as the X-axis, and the vertical direction of the earth as the Y-axis. Make coarse adjustments to the X-axis accuracy, Y-axis accuracy, and Z-axis accuracy of the perforated bracket (4) at each location in sequence. The method for coarsely adjusting the Z-axis accuracy of the perforated bracket (4) at various positions in S3 is as follows: S331: Rotate the boom (3) 360°, scan the rotation path and central axis by the laser tracker, and transfer the rotation path and central axis to the three-dimensional model of the blade attitude through the target ball fitting; S332: In the 3D model, the face containing the rotation path coincides with the face containing the blade root, and the midpoint of the rotation path coincides with the midpoint of the blade root; the rotation path is a perfect circle. S333: Define the surface where the rotation path coincides with the surface where the blade root is located as the coincident surface. Adjust the distance between each perforation bracket (4) and the coincident surface in the Z direction so that the distance between each perforation bracket (4) and the coincident surface in the Z direction meets the design requirements of the perforation bracket (4). S4: Fine-tune the position of the perforated bracket (4) at each location. Specifically, use laser tracking to scan the contour of the airfoil (5) of the perforated bracket (4) one by one. Feed back the deviation of the X-axis, Y-axis and Z-axis coordinates of the corresponding perforated bracket based on the fitting result of the airfoil (5) in the three-dimensional model. Fine-tune the perforated bracket (4) in the X-axis direction, Y-axis direction and Z-axis direction based on the feedback result.

2. The debugging method of the wind turbine blade root perforation bracket according to claim 1, characterized in that, The design method of the airfoil plate (5) of the corresponding hole bracket (4) in S2 is as follows: S21: Assign H to the height of the central axis of the three-dimensional airfoil model of the wind turbine blade (6), cut out the blade cross-section (1) at the corresponding position of the perforated bracket (4), and mark the position of the blade central axis L2 of the blade cross-section (1). S22: Using the same 0m height as the main body of the drilling equipment (7) as the reference plane M, and using the SS surface airfoil outline of the blade profile (1) as the contact surface arc, design drilling brackets (4) with different cross sections.

3. The debugging method of the wind turbine blade root perforation bracket according to claim 2, characterized in that, Before coarsely adjusting the position of the perforated brackets (4) at each location in S3, the central axis L1 of the boom must be projected onto the ground using a level and marked as a straight line L3; then each perforated bracket (4) is installed with the straight line L3 as the reference.

4. The debugging method of the wind turbine blade root perforation bracket according to claim 3, characterized in that, The method for coarsely adjusting the X-axis accuracy of the perforated bracket (4) at various positions in S3 is as follows: S311: Use a level to project the boom centerline L1 onto the airfoil plate (5) of the perforated bracket (4); S312: Adjust the position of the punching bracket (4) so ​​that the blade centerline L2 in the three-dimensional airfoil model of the blade attitude is collinear with the boom centerline L1; complete the coarse adjustment of the accuracy of the punching bracket (4) in the X-axis direction.

5. The debugging method of the wind turbine blade root perforation bracket according to claim 4, characterized in that, The method for coarsely adjusting the Y-axis accuracy of the perforated bracket (4) at various positions in S3 is as follows: S321: Based on the reference plane M, mark the height of the leading edge of the airfoil (5) of each perforated bracket (4) as H1, the height of the trailing edge of the airfoil (5) as H2, and the height of the blade centerline L2 as H0. S322: Adjust the height of the leading edge, trailing edge, and blade centerline L2 of the airfoil (5) of each punch bracket (4) so ​​that H1, H2 and H0 meet the height requirements of the leading edge, trailing edge and centerline of the airfoil (5) in the design drawing of the punch bracket (4); complete the rough adjustment of the accuracy of the punch bracket (4) in the Y-axis direction.

6. The debugging method of the wind turbine blade root perforation bracket according to claim 5, characterized in that, In S12, the light receiving plate is positioned 15-20m away from the laser beam emitter.

7. The debugging method for the wind turbine blade root perforated bracket according to claim 6, characterized in that, When installing each punch bracket (4) in S3, the number of punch brackets (4) is greater than 5 groups, and the distance between each group of punch brackets (4) is 10m-20m.

8. The debugging method of the wind turbine blade root perforation bracket according to claim 7, characterized in that, When coarsely adjusting the accuracy of the Y-axis direction of the S322 drilling bracket (4), H1, H2 and H0 should be adjusted to a state where the deviation between them and the design value in the design drawing of the drilling bracket (4) is less than 5mm.

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