A deformation detection device for a wind turbine blade root section

Abstract

The present application relates to wind power blade processing detection technical field, specifically a kind of wind power blade root section deformation detection device. Including two distance measuring trolley, laser range finder being arranged on one of distance measuring trolley and laser reflector plate being arranged on another distance measuring trolley;Distance measuring trolley includes the vehicle body that can be moved along the flange circumferentially located at the root of wind power blade and the load-bearing column for carrying laser range finder or laser reflector plate;The end of load-bearing column is provided with the guide head for entering bolt hole, the other end is used for corresponding laser range finder or laser reflector plate fixed;Vehicle body is provided with radial elastic member and axial elastic member connected with load-bearing column, axial elastic member is used to extrude load-bearing column, radial elastic member is used to cooperate with axial elastic member, to make the part of load-bearing column close to guide head enter bolt hole and form positioning. The present application can simply, conveniently, quickly detect the distance of any relative bolt hole to fully and accurately reflect the deformation of wind power blade root section.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine blade processing detection, in particular to a wind turbine blade root section deformation detection device. BACKGROUND

[0002] In the current booming wind power industry, wind turbine blades, as the core components of wind power generation systems, directly affect the performance and safety of the entire power generation system. Ensuring the accuracy of the wind turbine blade root section circle, which perfectly matches the wind turbine hub, is a key quality control point in the manufacturing process of wind turbine blades. Currently, the detection technology for wind turbine blade root section circle deformation, whether traditional or emerging, is constantly exploring and developing, but it also faces many challenges.

[0003] Traditional wind turbine blade root section circle deformation detection often uses a specially designed large circular ring test tooling. This tooling is made according to the size of the wind turbine root hub connection, with an outer diameter of more than 4 meters, a radial length of about 150mm, and evenly distributed bolt holes inside the ring, weighing up to about 1.5 tons. During actual detection, heavy circular ring test tooling needs to be lifted by lifting equipment, and under the close cooperation of multiple workers, the blade root connecting bolts are carefully inserted and threaded into the bolt holes of the test tooling and the wind turbine blade root flange one by one, until all the coinciding bolt holes are connected with the bolts, and then a detection is completed. This process not only consumes a lot of manpower, material resources and time, and has extremely low detection efficiency, but also has safety risks such as heavy objects falling and personnel colliding during lifting and installing the tooling, posing a serious threat to the safety of workers. At the same time, due to the large size of the tooling and the complex operation, the detection process is also easily disturbed by environmental factors, making it difficult to ensure the accuracy of the detection results.

[0004] With the advancement of technology, some innovative detection methods have emerged, such as the wind turbine blade root section circle deformation detection mechanism and method proposed in patent No. 202311164639.9. This technology sets up an infrared probe on the positioning bolt, uses an infrared receiver to receive signals, and uses a central control unit for data processing and analysis to determine whether the blade root section circle is deformed. Although this method simplifies the detection process to some extent and improves the detection efficiency, it still exposes some problems in actual application.

[0005] On the one hand, it only measures the distance between specific groups of opposite bolt holes, and cannot comprehensively and accurately obtain the distance data between all opposite bolt holes. If the measurement of the distance between all opposite bolt holes is to be realized, the staff needs to insert the positioning bolt into all bolt holes in turn. However, the flange outer diameter of the wind turbine blade is large, the number of bolt holes is large and densely distributed, and the operation space is very narrow. This makes the staff not only bear high-intensity physical labor during the operation, but also the operation process is complicated, and it is easy to make operation mistakes. More seriously, since there are sharp components and complex mechanical structures around the flange, the staff frequently shuttle in the narrow space, and it is very likely to cause accidents such as bumping and extrusion, and there is a great safety hazard.

[0006] On the other hand, in this technology, the positioning bolt relies on the elastic structure on the outer periphery to realize the close fit with the bolt hole. Although this design can ensure the fixation of the positioning bolt in the bolt hole, it is difficult to ensure the accurate concentricity of the infrared probe on the positioning bolt and the bolt hole. In actual operation, when the positioning bolt is inserted into the bolt hole, the elastic structure will be deformed due to extrusion, and this deformation will cause the position of the positioning bolt in the bolt hole to deviate, and then the infrared probe and the bolt hole are not concentric. The deviation of the position of the infrared probe will directly affect the accuracy of the signal received by the infrared receiver, and cause the positioning bolt position information obtained by the central control unit to have errors. With the accumulation of errors, the finally calculated positioning bolt distance is greatly deviated from the actual distance, which seriously affects the precision of the detection result, and cannot provide reliable data support for the quality control of the wind turbine blade. SUMMARY

[0007] The present application aims to provide a deformation detection device for the root section of a wind turbine blade, which can simply, conveniently and quickly detect the distance between all opposite bolt holes to comprehensively and accurately reflect the deformation of the root section of the wind turbine blade.

[0008] In order to solve the above technical problems, the specific scheme adopted by the present application is: a wind power blade root section deformation detection device, comprising two distance measuring trolleys, a laser range finder arranged on one of the distance measuring trolleys, and a laser reflector arranged on the other distance measuring trolley; the distance measuring trolley comprises a trolley body capable of moving circumferentially along a flange located at the root of the wind power blade, and a bearing column for bearing the laser range finder or the laser reflector; the bearing column is distributed perpendicularly to the flange and has an outer diameter corresponding to the inner diameter of a bolt hole on the flange, one end of the bearing column is provided with a guide head for entering the bolt hole, and the other end is used for fixing the corresponding laser range finder or laser reflector; the trolley body is provided with a radial elastic member and an axial elastic member connected with the bearing column, the axial elastic member is used for pressing the bearing column, so that the guide head is in close contact with the surface of the flange or is inserted into the bolt hole during movement of the trolley body, and the radial elastic member is used for cooperating with the axial elastic member after the guide head enters the bolt hole, so that the part of the bearing column close to the guide head enters the bolt hole to form positioning.

[0009] Preferably, a through hole is formed in the trolley body for the bearing column to pass through, and the hole diameter of the through hole is greater than the outer diameter of the bearing column; a sleeve is fixedly arranged at the through hole of the trolley body, and the radial elastic member and the axial elastic member are arranged between the sleeve and the bearing column.

[0010] Preferably, the radial elastic member and the axial elastic member are both springs and are respectively provided with a plurality of springs; the plurality of radial elastic members are distributed in a radial manner with the bearing column as the center, the outer end of the radial elastic member is fixed on the inner wall of the sleeve, and the inner end is fixedly connected to the outer wall of the same guide cylinder, the bearing column is slidably sleeved in the guide cylinder and is positioned and matched through the key groove structure; one end of the plurality of axial elastic members is fixed on the flange arranged at the end of the sleeve, and the other end is fixed on the retaining ring fixed to the outer periphery of the bearing column.

[0011] Preferably, a reset mechanism for resisting the thrust of the axial elastic member is arranged between the sleeve and the bearing column, so that the guide head is pulled out of the bolt hole; the reset mechanism comprises a first electromagnet fixed on the bearing column and a second electromagnet fixed in the sleeve, the first electromagnet and the second electromagnet are spaced apart and correspondingly distributed along the axial direction of the bearing column, and the first electromagnet and the second electromagnet are pushed and contacted by the axial elastic member to limit the insertion depth of the bearing column inserted into the bolt hole.

[0012] Preferably, the trolley body comprises a U-shaped trolley body arranged around the outer periphery of the flange and a plate-shaped trolley body located on the inner side of the root of the wind power blade, the U-shaped trolley body is provided with a plurality of rollers rotatably matched with the side edge and the outer edge of the flange, and the plate-shaped trolley body is provided with a plurality of rollers rollingly matched with the inner side of the root of the wind power blade.

[0013] Preferably, the U-shaped trolley body and the plate-shaped trolley body are detachably fixedly connected through screws.

[0014] Preferably, the wheel bodies of the rollers are all made of rubber material.

[0015] Preferably, the rollers arranged on the plate-shaped vehicle body are driven by a driving motor.

[0016] Preferably, the guide head is semicircular or conical.

[0017] Preferably, the cross section of the bearing column is circular or quincunx.

[0018] Compared with the prior art, the present application has the following beneficial effects.

[0019] The detection method is convenient and efficient: the present application sets two distance measuring trolleys which can move along the circumference of the flange at the root of the wind turbine blade, measures the distance by using a laser range finder and a laser reflector, and compared with the traditional large tooling detection, it does not need to hoist heavy tooling, and the operation is more convenient. The distance measuring trolley can move flexibly, and can quickly measure the distance between the corresponding points of the bolt holes at different positions, greatly improving the detection efficiency.

[0020] The positioning is accurate and reliable: the outer diameter of the bearing column corresponds to the inner diameter of the bolt hole on the flange, and the guide head is provided, which facilitates the entry into the bolt hole. The axial elastic member and the radial elastic member cooperate with each other, so that the bearing column can be automatically and stably positioned in the bolt hole after being roughly moved to the bolt hole with the vehicle body. The plurality of radial elastic members are distributed in a radial manner, and can position the bearing column from multiple directions, so as to ensure the accurate position of the bearing column in the bolt hole, and further ensure the stable position of the laser range finder and the laser reflector, and improve the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a detection state schematic view of a wind turbine blade root section deformation detection device of the present application.

[0022] Figure 2 It is a cooperation state schematic view of the distance measuring trolley part in the present application and the flange at the root of the wind turbine blade.

[0023] Figure 3 It is a state schematic view of the bearing column part in the present application after being inserted into the bolt hole. Figure 2

[0024] Mark in the figure: 1, distance measuring trolley, 101, roller, 102, plate-shaped vehicle body, 103, screw, 104, U-shaped vehicle body, 2, wind turbine blade root, 3, flange, 4, bearing column, 5, laser range finder, 6, laser reflector, 7, flange, 8, axial elastic member, 9, sleeve, 10, check ring, 11, first electromagnet, 12, second electromagnet, 13, support ring, 14, radial elastic member, 15, guide cylinder, 16, bolt hole, 17, guide head. DETAILED DESCRIPTION

[0025] As Figure 1 ​As shown, the deformation detection device for the root section of the wind turbine blade of the present application mainly comprises two distance measuring trolleys 1 capable of moving circumferentially along the flange 3 of the root 2 of the wind turbine blade, one of the distance measuring trolleys 1 is provided with a laser distance meter 5, and the other distance measuring trolley 1 is provided with a laser reflector 6. The laser distance meter 5 and the laser reflector 6 are automatically adjusted to be concentrically distributed with the bolt holes 16, so as to accurately measure the distance between the two bolt holes 16 on the flange 3. Further, the distance measuring trolley 1 moves a complete circle along the flange 3, so that the distance between all the bolt holes 16 can be measured. The detection data is compared with the design data by the personnel to determine the deformation degree of the root section of the wind turbine blade 2.

[0026] As shown, Figure 2 The distance measuring trolley 1 comprises a trolley body and a bearing column 4 penetrating the through hole provided on the trolley body.

[0027] The trolley body comprises a U-shaped trolley body 104 on the left side and a plate-shaped trolley body 102 on the right side. The right side of the U-shaped trolley body 104 is provided with a threaded hole, and the plate-shaped trolley body 102 is provided with a through hole. After the through hole and the threaded hole are aligned, the screw 103 is screwed in to fix the U-shaped trolley body 104 and the plate-shaped trolley body 102. The U-shaped trolley body 104 is arranged on the outer periphery of the flange 3, and the plate-shaped trolley body 102 is arranged on the inner side of the root 2 of the wind turbine blade. A plurality of rollers 101 are arranged on the U-shaped trolley body 104 and the plate-shaped trolley body 102. The rollers 101 on the plate-shaped trolley body 102 are drivingly connected with a driving motor (not shown in the figure) fixed on the plate-shaped trolley body 102 and form a driving wheel, and the rollers 101 on the U-shaped plate body are driven wheels. The rims of all the rollers 101 are made of elastic rubber material, so that after the U-shaped trolley body 104 and the plate-shaped trolley body 102 are fastened by the screw 103, the rims of the driving wheel and the corresponding driven wheels (rollers 101 located on the outer edge of the flange 3) are deformed to achieve clamping effect, so that the trolley body can move circumferentially along the flange 3 during the rotation of the driving motor. The remaining driven wheels are tightly pressed on both sides of the flange 3 by the structure specifications of the U-shaped plate body to achieve clamping effect, further improving the stability of the trolley body moving along the flange 3.

[0028] A through hole is provided on the part of the U-shaped trolley body 104 above the flange 3, and a sleeve 9 is fixed above the through hole. The top of the sleeve 9 is open to allow the bearing column 4 to pass out and move along the axial direction under the action of external force. The inner diameter of the sleeve 9 is larger than the outer diameter of the bearing column 4, so that the bearing column 4 can move laterally under the action of external force to automatically adapt to the bolt holes 16 on the flange 3.

[0029] The bearing column 4 is a straight column with a circular cross section, and its outer diameter corresponds to the inner diameter of the threaded hole on the flange 3 to be measured. The upper end of the bearing column 4 protrudes from the sleeve 9, and the detection cooperation reference of the laser range finder 5 and the laser reflection plate 6 is fixed and installed concentrically. The lower end is fixed with a semicircular guide head 17, so that when the bearing column 4 moves with the vehicle body to the approximate position of the bolt hole 16, the guide head 17 can enter the bolt hole 16 first, and the subsequent bearing column 4 enters the bolt hole 16 to complete the positioning. A stop ring 10 is fixed on the bearing column 4 near the middle part, and the stop ring 10 is fixedly connected with a plurality of springs as axial elastic members 8. The upper end of the spring is fixedly connected to the flange 7 provided at the top of the sleeve 9. The axial elastic member 8 is in a compressed state, has an elastic potential energy to push the bearing column 4 to move downward, and tightly touches the upper edge of the flange 3 when the guide head 17 does not move with the vehicle body to the bolt hole 16, and pushes the bearing column 4 to move downward when the guide head 17 moves with the vehicle body to the approximate position concentric with the bolt hole 16, and makes the guide head 17 enter the bolt hole 16. A guide cylinder 15 is provided on the outer periphery of the end portion of the bearing column 4 close to the guide head 17, and a plurality of springs as radial elastic members 14 are connected to the outer edge of the guide cylinder 15 in the circumferential direction, and the outer ends of all radial elastic members 14 are fixed on the sleeve 9. After the guide head 17 moves with the vehicle body to the bolt hole 16 and is pushed into the bolt hole 16 by the axial elastic member 8, the radial elastic member 14 can adaptively adjust the posture of the bearing column 4 to be concentric with the bolt hole 16, so that the lower end of the bearing column 4 is pushed into the bolt hole 16 by the axial elastic member 8. At this time, the laser range finder 5 and the laser reflection plate 6 provided on the upper end of the bearing column 4 as shown in the figure are in a posture concentric with the respective bolt hole 16, thereby ensuring the accuracy of measurement. Figure 3

[0030] The bearing column 4 and the guide cylinder 15 in the embodiment are matched through a key groove structure to avoid rotation of the bearing column 4 during insertion into the bolt hole 16, thereby ensuring that the laser emitted by the laser range finder 5 can accurately irradiate on the laser reflection plate 6 to complete the ranging.

[0031] ​To reset the bearing column 4 after measuring the spacing of a set of bolt holes 16, a first electromagnet 11 is fixedly installed at the lower edge of the retaining ring 10, and a second electromagnet 12 is installed on the sleeve 9 below the first electromagnet 11. The second electromagnet 12 is fixed inside an annular support ring 13 welded to the inner wall of the sleeve 9, and a battery (not shown in the figure) is installed on the vehicle body to power the first electromagnet 11 and the second electromagnet 12. During the aforementioned distance measurement process, neither the first electromagnet 11 nor the second electromagnet 12 is energized. After the distance measurement is completed, the first electromagnet 11 and the second electromagnet 12 are energized to generate a repulsive force against the axial elastic element 8. This repulsive force pushes the bearing column 4 upward until it completely disengages from the bolt holes 16 at the lower edge of the guide head 17. Then, the vehicle body is moved to separate the bearing column 4 from the measured bolt holes 16, and the power supply to the first electromagnet 11 and the second electromagnet 12 is disconnected again. That is, the axial elastic element 8 pushes the bearing column 4 downward again, causing the guide head 17 to contact the flange 3 to complete the reset.

[0032] In addition, such as Figure 3 As shown, when the bearing column 4 is inserted into the bolt hole 16 at the lower end for distance measurement, the first electromagnet 11 and the second electromagnet 12 contact each other to prevent the bearing column 4 from moving further down, thereby forming a depth limit for the bearing column 4 to be inserted into the bolt hole 16. This ensures that the longitudinal position of the laser rangefinder 5 and the laser reflector 6 remains consistent during each set of distance measurement relative to the bolt hole 16, thus ensuring the accuracy of the distance measurement.

[0033] Based on the above technical solution, the testing process of this invention is as follows: First, as... Figure 1As shown, two distance measuring trolleys 1 are installed on the flange 3 of the wind turbine blade root 2 respectively, and the two bearing columns 4 are respectively located close to the two opposite bolt holes 16. Then the two distance measuring trolleys 1 are started to move in the same direction along the circumference of the flange 3, until the bearing columns 4 on the two distance measuring trolleys 1 are approximately moved to be concentric with the bolt holes 16, and then the two opposite bolt holes 16 are respectively positioned and inserted through the cooperation of the circumferential elastic member and the radial elastic member 14, and the laser range finder 5 can be started to measure the distance and obtain the distance between the two opposite bolt holes 16. After the distance measurement, the bearing columns 4 are reset through the cooperation of the first electromagnet 11 and the second electromagnet 12, and then the two distance measuring trolleys 1 are controlled to move in the same direction again to approach the next group of opposite bolt holes 16 for distance measurement, and the distance measurement of all opposite bolt holes 16 is completed in turn. Finally, the distance measurement result is compared with the design requirement to obtain the conclusion whether the cross-section circle of the wind turbine blade root 2 is deformed and whether it meets the assembly requirement. If the distance between each group of opposite bolt holes 16 is within ±3mm of the designed amount, it is determined that the cross-section circle of the wind turbine blade root 2 can meet the process requirement. If the distance between at least one group of opposite bolt holes 16 exceeds ±3mm of the designed amount, it means that the cross-section circle of the wind turbine blade root 2 is deformed too much and cannot meet the process requirement.

Claims

1. A device for detecting deformation of a wind turbine blade root section, characterized in that: The utility model relates to a kind of wind turbine blade root flange diameter measuring device, including two ranging trolleys (1), laser range finder (5) being arranged on one of ranging trolleys (1) and laser reflector (6) being arranged on the other ranging trolley (1);Ranging trolley (1) includes the trolley body that can be moved along the flange (3) of wind turbine blade root (2) circumferentially and the load column (4) for carrying laser range finder (5) or laser reflector (6);Load column (4) is distributed perpendicular to flange (3) and outer diameter corresponds with the inner diameter of bolt hole (16) on flange (3), and load column (4) is provided with guide head (17) for entering bolt hole (16) in one end, and the other end is used for corresponding laser range finder (5) or laser reflector (6) fixed;Trolley body is provided with radial elastic component (14) and axial elastic component (8) connected with load column (4), and axial elastic component (8) is used to extrude load column (4), so that load column (4) makes guide head (17) tightly touch on flange (3) surface or insert bolt hole (16) during the movement of trolley body, and radial elastic component (14) is used to cooperate with axial elastic component (8) after guide head (17) enters bolt hole (16), so that the part of load column (4) close to guide head (17) enters bolt hole (16) and forms positioning; Perforation is provided on trolley body for load column (4) to penetrate, and the aperture of perforation is greater than the outer diameter of load column (4);Sleeve (9) is fixed on trolley body at the position of perforation, and radial elastic component (14) and axial elastic component (8) are arranged between sleeve (9) and load column (4); Radial elastic component (14) and axial elastic component (8) are both springs and are respectively provided with multiple;Multiple radial elastic components (14) are distributed radially with load column (4) as center, the outer end of radial elastic component (14) is fixed on the inner wall of sleeve (9), and the inner end is fixedly connected on the outer wall of same guide cylinder (15), load column (4) is slidably sleeved in guide cylinder (15), and is positioned and cooperated by key groove structure;One end of multiple axial elastic components (8) is fixed on the flange (7) arranged at the end of sleeve (9), and the other end is fixed on the retainer ring (10) fixed on the outer periphery of load column (4); Reset mechanism for resisting the thrust of axial elastic component (8) is arranged between sleeve (9) and load column (4), so that guide head (17) is out of bolt hole (16);Reset mechanism includes first electromagnet (11) fixed on load column (4) and second electromagnet (12) fixed in sleeve (9), and first electromagnet (11) and second electromagnet (12) are spaced along the axial direction of load column (4) and correspondingly distributed, and first electromagnet (11) and second electromagnet (12) are pushed and contacted by axial elastic component (8) to form the insertion depth limit of load column (4) inserted into bolt hole (16).

2. A device for detecting deformation of a root section of a wind turbine blade according to claim 1, characterized in that: The vehicle body comprises a U-shaped vehicle body (104) arranged outside the periphery of the flange (3) and a plate-shaped vehicle body (102) arranged inside the wind power blade root (2), the U-shaped vehicle body (104) is arranged with the rolling wheels (101) which are rotatably matched with the side edge and the outer edge of the flange (3) at intervals, and the plate-shaped vehicle body (102) is arranged with the rolling wheels (101) which are rolling matched with the inside of the wind power blade root (2).

3. A device for detecting deformation of a root section of a wind turbine blade according to claim 2, characterized in that: The U-shaped vehicle body (104) and the plate-shaped vehicle body (102) are detachably fixedly connected through the screw (103).

4. A device for detecting deformation of a root section of a wind turbine blade according to claim 2, characterized in that: The wheel bodies of the rolling wheels (101) are all made of rubber material.

5. A device for detecting deformation of a root section of a wind turbine blade according to claim 2, characterized in that: The rolling wheels (101) arranged on the plate-shaped vehicle body (102) are driving connected with the driving motor.

6. A device for detecting deformation of a root section of a wind turbine blade according to claim 1, characterized in that: The guide head (17) is semicircular or conical.

7. A device for detecting deformation of a root section of a wind turbine blade according to claim 1, characterized in that: The cross section of the bearing column (4) is circular or plum blossom shaped.

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