Debugging method of wind power blade root punching support

Abstract

The invention relates to the technical field of wind power blades, in particular to a debugging method of a wind power blade root punching support, which comprises the following steps: S1, matching the theoretical height H of the central axis L1 of an arm support in wind power blade punching equipment; s2, wing-shaped plates of the punching supports at the corresponding positions are designed according to blade wing-shaped contour lines at different positions in the length direction of the wind power blade; s3, the positions of the punching supports at all the positions are roughly adjusted, specifically, the length direction of the wind turbine blade is set as the Z axis, the horizontal direction of the ground is set as the X axis, the vertical direction of the ground is set as the Y axis, and the X-axis direction precision, the Y-axis direction precision and the Z-axis direction precision of the punching supports at all the positions are roughly adjusted in sequence; and S4, the positions of the punching supports at all the positions are precisely adjusted. The debugging method in the scheme is simple and easy to operate, the joint quality of the blade root can be improved, and the punching position degree and planeness of the blade root are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine blades, and specifically provides a method for debugging a blade root punching bracket of a wind turbine blade. Background Art

[0002] As an important part of the clean energy field, wind power generation has been widely used in various fields, especially in areas with water shortage, fuel shortage or inconvenient transportation. As a renewable energy technology, wind power generation uses wind energy to convert it into electrical energy, which can greatly save the consumption of non-renewable energy. The use of wind power generation according to local conditions has been highly valued by countries around the world. As the most basic and critical component of a wind turbine, the performance and quality of wind turbine blades are the determining factors to ensure the normal and stable operation of wind turbines. In order to improve the reliability of wind turbines and obtain better power generation benefits, higher requirements are put forward for the positioning, debugging and processing of wind turbine blade related components.

[0003] When the wind turbine blade is hung, it is connected to the host interface through the blade root connection bolts. The blade root connection bolts are usually Figure 1 As shown, there are N identical bolts (N generally ranges from 70 to 170) evenly distributed along the circumferential array. The installation of the blade root connecting bolts requires the pre-embedded positioning round nuts in the wind turbine blades in advance. The pre-embedded round nuts need to be drilled in advance at the blade roots of the wind turbine blades using a punching device. The size of the drilled holes is determined by the size of the drilling tool of the punching device, but the flatness of the blade root end face, the position of all holes, and the angle between the central axis of the wind turbine blade and the blade root end face are determined by the relative position between the posture of the wind turbine blade during the punching process and the plane on which the punching device arm runs one circle, and the posture of the wind turbine blade during the punching process is determined by the punching bracket.

[0004] It can be seen that the wind turbine blade punching bracket is an indispensable tool for punching holes at the root of the blade. The position accuracy in space is particularly important for the flatness control of the root end face of the wind turbine blade and the accuracy control of the root interface. In order to improve the reliability of the wind turbine, it is necessary to ensure the installation accuracy of the root connecting bolts, the punching accuracy of the blade root, and the posture of the blade during the punching process. The relevant components need to be positioned and debugged, especially the blade shape and the precision debugging of the punching equipment need to be matched. Therefore, how to design a debugging method for a wind turbine blade root punching bracket to ensure the posture of the wind turbine blade, the position and flatness of the blade root punching, and the quality of the wind turbine blade interface is a problem that needs to be solved urgently. Summary of the invention

[0005] In order to solve the above-mentioned problem, the present invention provides a debugging method for a wind turbine blade root drilling bracket. By debugging multiple groups of drilling brackets, the posture of the wind turbine blade can be guaranteed, the central axis of the wind turbine blade and the central axis of the drilling equipment can be guaranteed to be collinear, the position and flatness of the wind turbine blade root drilling can be guaranteed, and the quality of the wind turbine blade can be improved.

[0006] The present invention provides a method for debugging a wind turbine blade root drilling bracket, which specifically comprises the following steps: S1: Match the theoretical height H of the center axis L1 of the boom in the wind turbine blade drilling equipment; S2: Designing the airfoil plates of the perforated brackets at the corresponding positions according to the airfoil contour lines of the wind turbine blades at different positions along the length direction; S3: roughly adjusting the positions of the punching brackets at various positions, specifically, assuming that the length direction of the wind turbine blade is the Z axis, the horizontal direction of the earth is the X axis, and the vertical direction of the earth is the Y axis, and sequentially roughly adjusting the X axis direction accuracy, Y axis direction accuracy, and Z axis direction accuracy of the punching brackets at various positions; S4: Finely adjust the position of the punching bracket at each position. Specifically, use laser tracking to scan the airfoil contour of the punching bracket one by one, and feedback the deviation of the X-axis, Y-axis, and Z-axis coordinates of the corresponding punching bracket based on the fitting result of the airfoil in the three-dimensional model. Finely adjust the punching bracket in the X-axis direction, Y-axis direction, and Z-axis direction based on the feedback result.

[0007] Furthermore, the theoretical height H of the center axis L1 of the boom in S1 is obtained by matching the following steps: S11: Roughly locate the center axis L1 of the boom of the drilling equipment on site; S12: Install a laser ray emitter and a light receiving plate at the center axis L1 of the arm of the drilling equipment at the rough positioning position; S13: Mark four marking points at 0°, 90°, 180°, and 270° on the light receiving plate, cross-connect the four marking points, and mark the connected intersection point A; S14: Use a laser tracker to locate the intersection on the light receiving plate, and light is directed in the reverse direction along the Z axis to the arm of the punching device, which is marked as point O. This point is the rotation center point of the arm of the punching device; S15: Adjust the position of the laser beam emitter to point O, and debug the emitted beam to pass through point A. The laser beam at this time is the central axis L1 of the arm of the drilling equipment.

[0008] Furthermore, the design method of the wing plate of the perforated bracket at the corresponding position in S2 is as follows: S21: assigning a height H to the center axis of the three-dimensional airfoil model of the wind turbine blade, cutting out the blade cross-section at each corresponding punching bracket position, and marking the position of the blade center axis L2 of the blade cross-section; S22: Taking the 0m height which is the same as the mainframe of the punching equipment as the reference plane M, and taking the SS surface airfoil contour line of the blade profile as the contact surface arc line, punching brackets with different cross sections are designed.

[0009] Furthermore, before roughly adjusting the positions of the punching brackets at various positions in S3, the center axis L1 of the arm needs to be projected onto the ground using a level and marked as a straight line L3; and then each punching bracket is installed based on the straight line L3.

[0010] Furthermore, the method for roughly adjusting the X-axis direction accuracy of the punching bracket at each position in S3 is as follows: S311: Use a level to project the center axis L1 of the boom onto the airfoil of the punching bracket; S312: Adjust the position of the punching bracket so that the blade center axis L2 engraved in the blade attitude three-dimensional airfoil model is in line with the arm center axis L1; complete the rough adjustment of the punching bracket in the X-axis direction.

[0011] Furthermore, the method for roughly adjusting the Y-axis direction accuracy of the punching bracket at each position in S3 is as follows: S321: Based on the reference plane M, 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 central axis L2 of the blade as H0; S322: Adjust the height of the leading edge, trailing edge, and center axis L2 of the airfoil of each punching bracket so that H1, H2, and H0 meet the requirements of the leading edge, trailing edge, and center axis height position of the airfoil in the punching bracket design drawing; complete the rough adjustment of the accuracy of the punching bracket in the Y-axis direction.

[0012] Furthermore, the method for roughly adjusting the Z-axis direction accuracy of the punching bracket at each position in S3 is as follows: S331: Rotate the boom 360°, scan the rotation path and the center axis with a laser tracker, and transfer the rotation path and the center axis to the three-dimensional model of the blade posture through target sphere fitting; S332: in the three-dimensional model, the surface where the rotation path is located coincides with the surface where the blade root is located, and the midpoint of the rotation path coincides with the midpoint of the blade root; the rotation path is a perfect circular contour; S333: The surface where the rotation path is located coincides with the surface where the blade root is located as the coincidence surface, and the distance between each punching bracket and the coincidence surface in the Z direction is adjusted so that the distance between each punching bracket and the coincidence surface in the Z direction meets the requirements of the punching bracket design position design.

[0013] Furthermore, in S12, the light receiving plate receives light at a position 15-20 m away from the laser beam emitter.

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

[0015] Furthermore, when the accuracy of the punching bracket in the Y-axis direction is roughly adjusted in S322, H1, H2 and H0 are adjusted to a state where the deviation from the design values ​​in the punching bracket design drawing is less than 5 mm.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: the debugging method in the present invention ensures that the central axis of the wind turbine blade is coaxial with the central axis of the punching machine arm by adjusting the position of the punching bracket, and designs punching brackets with different cross-sectional positions through the central axis of the rotating arm of the known punching equipment and the blade posture of the wind turbine blade. During on-site installation, the position accuracy of the wind turbine blade punching bracket in space is adjusted with the help of a laser transmitter, a level and a laser tracker light equipment. The 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 position of the hole, has strong versatility, and can be applied to the needs of wind turbine blades of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the planar structure of the blade root of a wind turbine blade provided in an embodiment of the present invention and the prior art, wherein B is a bolt hole for connecting the blade root; Figure 2 is a schematic diagram of the overall structure of a drilling device and a wind turbine blade provided according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a punching device provided according to an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the perforated bracket provided according to an embodiment of the present invention Figure 1 (C is the projection of the blade centerline on the airfoil); Figure 5 Schematic diagram of the structure of the perforated bracket provided according to an embodiment of the present invention Figure 2 ; Figure 6 Schematic diagram of four marking points on a light receiving plate provided according to an embodiment of the present invention.

[0018] The reference numerals include: blade section Figure 1 , base 2, arm 3, punching bracket 4, airfoil 5, wind turbine blade 6, punching equipment 7. DETAILED DESCRIPTION

[0019] In the following, reference will be made to the Figure 1-6 Embodiments of the present invention are described. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following Figure 1-6 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0021] A method for debugging a wind turbine blade root drilling bracket comprises the following steps: S1: Match the theoretical height H of the central axis L1 of the boom in the wind turbine blade 6 drilling device 7. The theoretical height H of the central axis L1 of the boom is obtained by matching the following steps: S11: Roughly locate the center axis L1 of the boom of the drilling device 7 on site.

[0022] S12: Install a laser ray emitter and a light receiving plate at the center axis L1 of the arm of the punching device 7 at the rough positioning position, and the light receiving plate receives light at a position 15-20m away from the laser ray emitter; S13: Mark four points at 0°, 90°, 180°, and 270° on the light receiving board, such as Figure 6 As shown, the four marked points are cross-connected and the connected intersection point A is marked; S14: Use a laser tracker to locate the intersection on the light receiving plate, and shoot light in the reverse direction along the Z-axis to the arm 3 of the punching device 7, marked as point O, which is the rotation center point of the arm 3 in the punching device 7; S15: Adjust the position of the laser beam emitter to point O, and debug 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 device 7.

[0023] S2: Design the airfoil plate 5 of the perforated bracket 4 at the corresponding position according to the blade airfoil contour line at different positions in the length direction of the wind turbine blade 6. The design method of the airfoil plate 5 of the perforated bracket 4 at the corresponding position is as follows: S21: assigning a height H to the center axis of the three-dimensional airfoil model of the wind turbine blade 6, and cutting out the blade sections at the positions of the corresponding perforated brackets 4. Figure 1 , mark the blade section Figure 1 The position of the blade centerline L2; S22: Take the same 0m height as the main machine of the drilling device 7 as the reference plane M, and the blade section Figure 1 The SS airfoil contour line is the contact surface arc line to design perforated brackets of different cross sections 4. Figure 3As shown, the punching device 7 includes a base 2, on which a punching unit, a milling unit and an arm 3 located in the middle are arranged.

[0024] S3: Roughly adjust the position of the punching bracket 4 at each position. Specifically, assume that the length direction of the wind turbine blade 6 is the Z axis, the horizontal direction of the earth is the X axis, and the vertical direction of the earth is the Y axis. Roughly adjust the X-axis direction accuracy, Y-axis direction accuracy, and Z-axis direction accuracy of the punching bracket 4 at each position in turn.

[0025] Before roughly adjusting the position of the punching bracket 4 at each position, use a level to project the center axis L1 of the arm to the ground and mark it as straight line L3; then install each punching bracket 4 based on straight line L3. The number of punching brackets 4 is greater than 5 groups, and the distance between each group of punching brackets 4 is 10m-20m.

[0026] The method for roughly adjusting the X-axis direction accuracy of the punching bracket 4 at each position in S3 is as follows: S311: Use a level to project the center axis L1 of the boom onto the wing plate 5 of the punching bracket 4; S312: Adjust the position of the punching bracket 4 so that the blade center axis L2 engraved in the blade attitude three-dimensional airfoil model is in line with the arm center axis L1, completing the rough adjustment of the accuracy of the punching bracket 4 in the X-axis direction.

[0027] The method for roughly adjusting the Y-axis direction accuracy of the punching bracket 4 at each position in S3 is as follows: S321: Figure 5 As shown, based on the reference plane M, the height of the leading edge of the airfoil plate 5 of each perforated bracket 4 is marked as H1, the height of the trailing edge of the airfoil plate 5 is marked as H2, and the height of the central axis L2 of the blade is marked as H0. Figure 5 As shown, point C is the projection of the blade center axis L2 on the airfoil plate 5. Figure 5 In the figure, L2 is the position of the blade center axis L2 simulated in the virtual space. When defining the height H0 of the blade center axis L2, it is defined by the highest point of the projection C of the blade center axis L2 on the airfoil 5, that is, Figure 5 In the figure, H0 is 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 center axis L2 of the airfoil 5 of each punching bracket 4 so that H1, H2, and H0 meet the requirements of the leading edge, trailing edge, and center axis height position of the airfoil 5 in the design drawing of the punching bracket 4; complete the rough adjustment of the Y-axis accuracy of the punching bracket 4. When roughly adjusting the Y-axis accuracy of the punching bracket 4, H1, H2, and H0 should be adjusted to a state where the deviation from the design value in the design drawing of the punching bracket 4 is less than 5 mm.

[0029] The method for roughly adjusting the Z-axis direction accuracy of the punching bracket 4 at each position in S3 is as follows: S331: Rotate the arm 3 360°, scan the rotation path and the central axis with the laser tracker, and transfer the rotation path and the central axis to the three-dimensional model of the blade posture through the target ball fitting. Specifically, the target ball is installed at the milling unit of the drilling equipment, and as the arm 3 rotates 360°, the laser tracker scans the rotation path of the target ball, and then the target ball receives the rotation path and transfers it to the computer model.

[0030] S332: In the three-dimensional model, the surface where the rotation path is located is made to coincide with the surface where the blade root is located, and the midpoint of the rotation path is made to coincide with the midpoint of the blade root; the rotation path is a perfect circular contour, that is, the perfect circular contour is made to coincide with and be concentric with the end surface of the blade root.

[0031] S333: Define the surface where the rotation path is located and the surface where the blade root is located as the overlapping surface, and adjust the distance between each punching bracket 4 and the overlapping surface in the Z direction so that the distance between each punching bracket 4 and the overlapping surface in the Z direction meets the design requirements of the design position of the punching bracket 4.

[0032] S4: Finely adjust the position of the punching bracket 4 at each position. Specifically, use laser tracking to scan the contours of the wing plate 5 of the punching bracket 4 one by one, and feedback the deviations of the X-axis, Y-axis, and Z-axis coordinates of the corresponding punching bracket based on the fitting results of the wing plate 5 in the three-dimensional model. Finely adjust the punching bracket 4 in the X-axis direction, Y-axis direction, and Z-axis direction based on the feedback results.

[0033] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

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

Claims

1. A method for debugging a wind turbine blade root punching bracket, characterized in that: The steps include: S1: matching the theoretical height H of the center axis L1 of the middle arm of the wind turbine blade (6) drilling device (7); S2: designing an airfoil plate (5) of a perforated bracket (4) at a corresponding position according to the blade airfoil contour lines at different positions in the length direction of the wind turbine blade (6); S3: roughly adjusting the position of the punching bracket (4) at each position, specifically, assuming that the length direction of the wind turbine blade (6) is the Z axis, the horizontal direction of the earth is the X axis, and the vertical direction of the earth is the Y axis, and sequentially roughly adjusting the X axis direction accuracy, Y axis direction accuracy, and Z axis direction accuracy of the punching bracket (4) at each position; S4: finely adjusting the position of the punching bracket (4) at each position, specifically, using laser tracking to scan the contours of the wing plate (5) of the punching bracket (4) one by one, and feeding back the deviations of the X-axis, Y-axis, and Z-axis coordinates of the corresponding punching bracket according to the fitting results of the wing plate (5) in the three-dimensional model, and finely adjusting the punching bracket (4) in the X-axis direction, Y-axis direction, and Z-axis direction according to the feedback results.

2. The method for debugging a wind turbine blade root punching bracket according to claim 1, characterized in that: The theoretical height H of the center axis L1 of the boom in S1 is obtained by matching the following steps: S11: roughly locating the center axis L1 of the boom of the drilling device (7) on site; S12: Installing a laser beam emitter and a light receiving plate at the center axis L1 of the arm of the drilling device (7) at the rough positioning position; S13: Mark four marking points at 0°, 90°, 180°, and 270° on the light receiving plate, cross-connect the four marking points, and mark the connected intersection point A; S14: Use a laser tracker to locate the intersection on the light receiving plate, and illuminate in the reverse direction along the Z-axis to the arm (3) of the punching device (7), marking it as point O, which is the rotation center point of the arm (3) in the punching 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 device (7).

3. The method for debugging a wind turbine blade root punching bracket according to claim 2, characterized in that: The design method of the wing plate (5) of the punched bracket (4) at the corresponding position in S2 is as follows: S21: assigning a height H to the center axis of the three-dimensional airfoil model of the blade attitude of the wind turbine blade (6), cutting out the blade cross-sectional view (1) at the position of each corresponding punching bracket (4), and marking the position of the blade center axis L2 of the blade cross-sectional view (1); S22: Taking the same 0m height as the main body of the punching device (7) as the reference plane M, and taking the SS surface airfoil contour line of the blade cross-section diagram (1) as the contact surface arc line, punching brackets (4) with different cross sections are designed.

4. The method for debugging a wind turbine blade root punching bracket according to claim 3, characterized in that: Before roughly adjusting the position of the punching bracket (4) at each position in S3, it is necessary to first use a level to project the center axis L1 of the arm onto the ground and mark it as a straight line L3; then, each punching bracket (4) is installed based on the straight line L3.

5. The method for debugging a wind turbine blade root drilling bracket according to claim 4, characterized in that: The method for roughly adjusting the X-axis direction accuracy of the punching bracket (4) at each position in S3 is as follows: S311: Use a level to project the center axis L1 of the boom onto the wing plate (5) of the punching bracket (4); S312: adjusting the position of the punching bracket (4) so ​​that the blade center axis L2 depicted in the blade attitude three-dimensional airfoil model is in line with the arm center axis L1; completing the rough adjustment of the accuracy of the punching bracket (4) in the X-axis direction.

6. The method for debugging a wind turbine blade root drilling bracket according to claim 5, characterized in that: The method for roughly adjusting the Y-axis direction accuracy of the punching bracket (4) at each position in S3 is as follows: S321: Based on the reference plane M, mark the height of the leading edge of the airfoil plate (5) of each perforated bracket (4) as H1, the height of the trailing edge of the airfoil plate (5) as H2, and the height of the central axis L2 of the blade as H0; S322: adjusting the height of the leading edge, trailing edge, and center axis L2 of the airfoil (5) of each punching bracket (4) so ​​that H1, H2, and H0 meet the requirements for the leading edge, trailing edge, and center axis height position of the airfoil (5) in the design drawing of the punching bracket (4); completing the rough adjustment of the accuracy of the punching bracket (4) in the Y-axis direction.

7. The method for debugging a wind turbine blade root punching bracket according to claim 6, characterized in that: The method for roughly adjusting the Z-axis direction accuracy of the punching bracket (4) at each position in S3 is as follows: S331: rotating the arm (3) 360°, scanning the rotation path and the center axis with a laser tracker, and transferring the rotation path and the center axis to the three-dimensional model of the blade posture through target sphere fitting; S332: in the three-dimensional model, the surface where the rotation path is located coincides with the surface where the blade root is located, and the midpoint of the rotation path coincides with the midpoint of the blade root; the rotation path is a perfect circular contour; S333: The surface where the rotation path is located coincides with the surface where the blade root is located as a coincidence surface, and the distance between each punching bracket (4) and the coincidence surface in the Z direction is adjusted so that the distance between each punching bracket (4) and the coincidence surface in the Z direction meets the design requirements of the punching bracket (4) design position.

8. The method for debugging a wind turbine blade root punching bracket according to claim 7, characterized in that: The light receiving plate in S12 receives light at a position 15-20m away from the laser beam emitter.

9. The method for debugging a wind turbine blade root punching bracket according to claim 8, characterized in that: When installing the punching brackets (4) in S3, the number of the punching brackets (4) is greater than 5 groups, and the distance between each group of punching brackets (4) is 10m-20m.

10. The method for debugging a wind turbine blade root drilling bracket according to claim 9, characterized in that: S322 When roughly adjusting the accuracy of the punch 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 drawing of the punch bracket (4) is less than 5 mm.

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