Device and method for detecting thickness of mold closing seam of wind power blade

Abstract

The invention relates to a wind power blade mold closing seam thickness detection device and method. The device comprises a pressed body, a detection assembly, a power supply and a signal processor. The pressed body comprises a contact plate I and a contact plate II; one ends of the contact plate I and the contact plate II are connected through a revolute pair, the relative rotation axis of the contact plate I and the contact plate II is A, and the included angle between the two is an acute angle; the point, farthest from the axis A, on the contact plate I is B; the detection assembly is arranged on the upper surface of the contact plate II and connected with the negative electrode of the power supply through the signal processor. The contact plate I is connected with a power supply anode. After the web plate is closed, the contact plate I rotates relative to the contact plate II under the extrusion effect and makes contact with the upper end face of the detection assembly in sequence, and the distance between mold closing seams at the moment can be obtained according to the voltage input condition of the signal processor. According to the invention, the automatic detection and recording of the mold closing seam gap can be realized, the operation is simple and flexible, the detection precision is high, and the problems of measurement errors and the like caused by plasticine placement and manual measurement can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade detection, and in particular to a device and method for detecting mold seam thickness of a wind turbine blade. Background Art

[0002] As a clean and renewable energy source, wind energy is crucial to achieving the "dual carbon" goal and the transformation of a low-carbon energy system. With the rapid development of wind power generation technology, the forming technology of wind turbine blades has become more and more mature. Wind turbine blades are generally composed of upper and lower shells, two main beam webs in the middle, an auxiliary beam web, and a trailing edge beam web at the edge. The web is an important supporting structure for the two halves of the blade shell. The bonding process is the most important link in the manufacturing of the blade, and its manufacturing quality is directly related to the structural safety of the entire blade.

[0003] However, due to the combined effects of various factors such as mold deformation, hydraulic turnover instability, installation deviation, vacuum pressure difference, resin content difference, etc., there will be a certain local deviation between the theoretically calculated web profile size and the actual installation size. This results in the die seam size between the web and the blade not meeting the standard of (6±4) mm, causing the adhesive layer to be too thin or too thick, thus affecting the structural strength of the blade and the service life of the blade. Therefore, accurate and rapid detection of the thickness of the die seam of wind turbine blades is a key issue facing the wind turbine blade industry.

[0004] The existing web plate mold seam measurement method mainly relies on measuring the thickness of the plasticine after being squeezed by the web plate and the shell, and judging whether the web plate bonding gap meets the requirements based on the plasticine data, and providing a basis for the subsequent web plate profile adjustment. However, this detection scheme is complicated and time-consuming to operate, and has poor accuracy, which seriously affects the production efficiency and product quality of the blade. Summary of the invention

[0005] In view of the above problems, the object of the present invention is to provide a wind turbine blade mold seam thickness detection device and method, which can quickly and accurately measure the size of the mold seam between the web and the blade at different positions.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A wind turbine blade mold seam thickness detection device proposed in the present invention comprises a pressure-bearing body, a detection component, a power supply and a signal processor; the pressure-bearing body comprises a contact plate I and a contact plate II; the contact plate I is connected to a rotating pair at one end of the contact plate II, the relative rotation axis of the contact plate I and the contact plate II is A, and the angle between the two is an acute angle; the point on the contact plate I that is farthest from the axis A is B; the detection component is arranged on the upper surface of the contact plate II and is connected to the negative pole of the power supply through the signal processor; the contact plate I is connected to the positive pole of the power supply.

[0008] Furthermore, a layer of plastic film is provided on the surface of the contact plate II; and the detection component is fixed on the plastic film accordingly.

[0009] Furthermore, the detection assembly includes a conductive contact and a wire; the number of the conductive contacts is n; the distance between each conductive contact and the rotation axis A is l n The bottom of each conductive contact is glued to the plastic film; the conductive contacts are connected to the signal processor via a wire, and the wires do not touch each other or are insulated from each other.

[0010] Furthermore, the conductive contact is a metal coil spring or a metal leaf spring or a conductive sponge followed by a conductive copper column or conductive silicone.

[0011] Furthermore, the height of the conductive contact is set to 0.1 mm to 15 mm.

[0012] Furthermore, a piece of plasticine is provided in the area directly below point B on the upper surface of the plastic film; the height of the plasticine is the maximum thickness of the unqualified mold seam.

[0013] Furthermore, the signal processor is composed of an electrical signal detection module, a data processing module, a data transmission module and a data storage module.

[0014] A method for detecting the thickness of a wind turbine blade mold seam, the method comprising the following steps:

[0015] S1. Place the pressure-bearing body of the detection device in the die seam area of ​​the wind turbine blade, with the contact plate II in contact with the lower blade, and the power supply and signal processor away from the die seam area;

[0016] S2, closing the upper mold and the lower mold of the wind turbine blade;

[0017] S3, detecting N wires connected to the conductive contacts through an electrical signal detection module to obtain the codes of the conductive wires, and selecting the maximum value M of the codes;

[0018] S4. Calculate the distance between the mold gaps using the data processing module according to the following formula:

[0019]

[0020] In the formula, h B is the distance from point B on contact plate I to contact plate II, b is the distance from point B on contact plate I to the rotation axis A, s1 is the thickness of contact plate I, s2 is the thickness of contact plate II, h M is the height of the conductive contact with code M, l M The distance from the conductive contact code M to the rotation axis A;

[0021] S5, through the data transmission module H M The data is transmitted to the data storage module for recording, so as to obtain the die seam thickness at the location of the pressure-bearing body;

[0022] S6, arranging multiple detection devices along the width direction of the blade mold seam, and obtaining the multi-point thickness values ​​along the width direction of the mold seam according to steps S1 to S5;

[0023] S7, arranging a plurality of detection devices along the length direction of the blade mold seam, and obtaining the thickness values ​​at multiple points along the length direction of the mold seam according to steps S1 to S5.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention has rapid detection. After placing the detection device in the corresponding mold seam area, the mold seam measurement at all positions can be quickly completed with only one mold closing. The operation is simple and flexible, saving manpower.

[0026] 2. The present invention has high detection accuracy and eliminates the measurement error problem caused by manual measurement.

[0027] 3. The present invention has good applicability and can realize the measurement of the mold seams of wind turbine blades of different positions, models and sizes by simply adjusting the number of detection devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a first embodiment of a wind turbine blade mold seam thickness detection device proposed by the present invention;

[0029] Figure 2 for Figure 1 Side view of the detection effect;

[0030] Figure 3 This is a schematic structural diagram of a second embodiment of a wind turbine blade mold seam thickness detection device proposed by the present invention;

[0031] Figure 4 for Figure 3 Side view of the detection effect.

[0032] Among them, the figure marks are: 1-contact plate I; 2-contact plate II; 3-plastic film; 4-conductive contact; 5-conducting wire; 6-signal processor; 7-power supply; 8-rotating shaft; 9-plasticine. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Embodiment 1

[0035] See attached Figure 1-2 The wind turbine blade mold seam thickness detection device proposed in this embodiment includes a pressure-bearing body, a detection component, a power supply 7 and a signal processor 6, wherein the signal processor 6 is composed of an electrical signal detection module, a data processing module, a data transmission module and a data storage module.

[0036] The pressure-bearing body is formed by bending an aluminum plate with a length of 60 mm, a width of 30 mm, and a thickness of 0.5 mm to form an acute-angle clamping plate, and the bending axis A is parallel to the width direction. The upper part of the clamping plate is the contact plate Ⅰ1, whose length b is 25 mm, and the lower part is the contact plate Ⅱ2, whose length is 35 mm. The bending parts of the contact plates Ⅰ1 and Ⅱ2 are connected by a flexible hinge, and the contact plate Ⅰ1 can rotate along the rotation axis A.

[0037] In this embodiment, the detection assembly includes 10 conductive contacts 4, and the 10 conductive contacts 4 are arranged on the contact plate II2 according to a certain rule; the conductive contact 4 can be a metal coil spring or a metal leaf spring or a conductive sponge followed by a conductive copper column or a conductive silicone. In this embodiment, the conductive sponge is used, which not only has good conductivity, but also can achieve large deformation and rebound, so it will not be damaged by web extrusion. In this embodiment, the height h of each conductive contact 4 is 1mm, the diameter is 3mm, the distance between the nth conductive contact and the rotation axis A is ln, and the ln distance increases successively, and its distribution is shown in Table 1.

[0038] Table 1

[0039] n 1 2 3 4 5 6 7 8 9 10 <![CDATA[l n / mm]]> 2.2913 2.5915 2.9607 3.4286 4.0449 4.8990 6.1695 8.2731 12.459 24.980

[0040] There is a layer of plastic film 3 on the top of the contact plate II2 to achieve insulation, and the thickness of the plastic film 3 is negligible. The lower end surface of each conductive contact 4 is glued to the top of the plastic film 3. Each conductive contact 4 is connected to a wire 5, a total of 10 wires, and the connected wires 5 do not touch each other or are insulated from each other; the distance between the upper end surface of each conductive contact 4 and the contact plate I1 increases successively with the increase of n. The contact plate I1 is connected to the positive pole of the power supply 7 through a wire. During the rotation of the contact plate I1 relative to the contact plate II2, it will contact the upper end surface of each conductive contact 4 in turn. The electrical signal detection module has 5 input ports, each of which is connected to the wire 5 on the contact plate II2, and is used to detect the wire 5 with electrical signals among all the wires. The electrical signal detection module is connected to the negative pole of the power supply 7, thereby forming a conductive circuit: positive pole of power supply-contact plate I1-conductive contact 4-wire 5-electrical signal detection module-negative pole of power supply. The data processing module calculates the thickness H of the current mold seam according to the position of the conductive contact 4 connected to the wire 5 with electrical signals M , the data transmission module can transfer H M The data is transferred to the data storage module for recording.

[0041] A method for detecting the thickness of a wind turbine blade mold seam, comprising the following steps:

[0042] S1, placing the pressure-bearing body of the detection device in the die seam area of ​​the wind turbine blade, with the contact plate II 2 in contact with the lower blade, and the power supply 7 and the signal processor 6 away from the die seam area;

[0043] S2, closing the upper mold and the lower mold of the wind turbine blade;

[0044] S3, detecting 10 wires 5 connected to the conductive contacts 4 through an electrical signal detection module, obtaining codes of the conductive wires 5, and selecting the maximum value M of the codes;

[0045] S4. Calculate the distance between the mold gaps using the data processing module according to the following formula:

[0046]

[0047] In the formula, h B is the distance from point B on contact plate I to contact plate II, b is the distance from point B on contact plate I to the rotation axis A, s is the thickness of the metal sheet, h is the height of the conductive contact 4, l M is the distance between the conductive contact 4 coded as M and the rotation axis A. Table 2 shows the corresponding distance between the mold gaps under different M values.

[0048] Table 2

[0049] M 1 2 3 4 5 6 7 8 9 10 <![CDATA[H M / mm]]> 11 10 9 8 7 6 5 4 3 2

[0050] S5, through the data transmission module H M The data is transmitted to the data storage module for recording, so as to obtain the die seam thickness at the location of the pressure-bearing body;

[0051] S6, arranging three mold seam detection devices along the width direction of the blade mold seam, and obtaining the thickness values ​​of three points in the width direction of the mold seam according to steps S1 to S5;

[0052] S7, k mold seam detection devices are arranged along the length direction of the blade mold seam, and the thickness values ​​of k points along the length direction of the mold seam can be obtained according to steps S1 to S5.

[0053] Embodiment 2

[0054] See attached Figure 3-4 The wind turbine blade mold seam thickness detection device proposed in this embodiment includes a pressure-bearing body, a detection component, plasticine 9, a power supply 8 and a signal processor 7. The signal processor 7 includes an electrical signal detection module, a data processing module, a data transmission module and a data storage module.

[0055] The pressure-bearing body includes two flat plates, contact plate Ⅰ1 and contact plate Ⅱ2. The length of contact plate Ⅰ1 is 25 mm and the width is 30 mm. The length of contact plate Ⅱ2 is 35 mm and the width is 30 mm. The thickness s1 and s2 of contact plate Ⅰ1 and contact plate Ⅱ2 are both 0.5 mm. One end of contact plate Ⅰ1 is connected to one end of contact plate Ⅱ2 by a rotary shaft 8. Contact plate Ⅰ1 can rotate along the rotary axis A. The point on contact plate Ⅰ1 that is farthest from the axis A is B.

[0056] In this embodiment, the detection assembly includes two conductive contacts 4 and a plasticine 9; the conductive contacts 4 are respectively arranged at the two ends of the upper surface of the contact plate II2 away from the rotation axis A; the heights h1 and h2 of the two conductive contacts 4 are 11 mm and 1 mm respectively, and the distances l1 and l2 between the two conductive contacts 4 and the rotation axis A are 22.913 mm and 24.980 mm respectively. Both conductive contacts 4 are made of conductive sponge, which not only has good conductivity, but also can achieve large deformation rebound, so they will not be damaged due to web extrusion.

[0057] There is a layer of plastic film 3 on the top of the contact plate II2 to achieve insulation, and the lower end surface of the conductive contact 4 is glued to the top of the plastic film 3 to achieve insulation between the contact plate II2. At the initial position of the pressure-bearing body, the contact plate I1 does not contact any conductive contact 4. During the rotation of the contact plate I1 relative to the contact plate II2, the contact plate I1 first contacts the upper end surface of the higher conductive contact 4, and then contacts the upper end surface of the lower conductive contact 4. The upper limit value a1 and the lower limit value a2 of the thickness of the wind turbine blade mold seam meet the following formula:

[0058]

[0059] The two conductive contacts 4 are each connected to a wire 5, the two wires 5 do not touch each other or are insulated from each other, and the two connecting wires 5 are respectively connected to the negative electrode of the power supply 7 through the signal processor 6; the contact plate Ⅰ1 is conductive, and the contact plate Ⅰ1 is connected to the positive electrode of the power supply 7 through the wire; the plasticine 9 is fixed on the contact plate Ⅱ2 and placed in the area directly below the point B of the contact plate Ⅰ1, and the height of the plasticine 9 is 15mm, the maximum thickness of the unqualified mold seam, the electrical signal detection module is respectively connected to the two wires 5 on the contact plate Ⅱ2, and can detect the wires with electrical signals in the two wires 5, the data processing module can judge whether the mold seam thickness is qualified according to the conduction status of the two wires 5, and the data transmission module can transmit the information on whether the thickness is qualified to the data storage module for recording.

[0060] A method for detecting the thickness of a wind turbine blade mold seam, comprising the following steps:

[0061] S1, placing the pressure-bearing body of the detection device in the die seam area of ​​the wind turbine blade, with the contact plate II 2 in contact with the lower blade, and the power supply 7 and the signal processor 6 away from the die seam area;

[0062] S2, closing the upper mold and the lower mold of the wind turbine blade;

[0063] S3, detecting two conductors 5 connected to the conductive contacts 4 through an electrical signal detection module to obtain the codes of the conductive wires;

[0064] S4, judging whether the blade mold seam is qualified in the data processing module according to the judgment logic in Table 1;

[0065] Table 1

[0066] Condition Wire 1 Wire 2 Thickness judgment 1 No conduction No conduction The mold seam thickness is greater than or equal to the upper limit of 12mm 2 Conductivity No conduction The thickness of the mold seam is qualified 3 Conductivity Conductivity The mold seam thickness is less than or equal to the lower limit of 2mm

[0067] S5, the judgment result in the data processing module is transmitted to the data storage module through the signal transmission module for recording, and the on-site staff performs thickness detection on the plasticine 9 in the pressure-bearing body in case 1 or case 3, thereby obtaining the thickness data of the unqualified mold seam;

[0068] S6, arranging three mold seam detection devices along the width direction of the blade mold seam, and obtaining three unqualified thickness values ​​in the width direction of the mold seam according to steps S1 to S5;

[0069] S7, arranging k mold seam detection devices along the length direction of the blade mold seam, and obtaining k points of unqualified thickness values ​​along the length direction of the mold seam according to steps S1 to S5.

[0070] Matters not described in detail in the present invention are all known technologies.

[0071] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A wind turbine blade mold seam thickness detection device, characterized in that: The device includes a pressure-bearing body, a detection component, a power supply and a signal processor; the pressure-bearing body includes a contact plate I and a contact plate II; the contact plate I is connected to a rotating pair at one end of the contact plate II, the relative rotation axis of the contact plate I and the contact plate II is A, and the angle between the two is an acute angle; the point on the contact plate I that is farthest from the axis A is B; the detection component is arranged on the upper surface of the contact plate II and is connected to the negative pole of the power supply through the signal processor; the contact plate I is connected to the positive pole of the power supply.

2. A wind turbine blade mold seam thickness detection device according to claim 1, characterized in that: A layer of plastic film is arranged on the surface of the contact plate II; and the detection component is fixed on the plastic film accordingly.

3. A wind turbine blade mold seam thickness detection device according to claim 2, characterized in that: The detection assembly includes a conductive contact and a wire; the number of the conductive contacts is n; the distance between each conductive contact and the rotation axis A is l n The bottom of each conductive contact is glued to the plastic film; the conductive contacts are connected to the signal processor via a wire, and the wires do not touch each other or are insulated from each other.

4. A wind turbine blade mold seam thickness detection device according to claim 3, characterized in that: The conductive contact is a metal coil spring or a metal leaf spring or a conductive sponge followed by a conductive copper column or conductive silica gel.

5. A wind turbine blade mold seam thickness detection device according to claim 3, characterized in that: The height of the conductive contact is set to 0.1 mm to 15 mm.

6. A wind turbine blade mold seam thickness detection device according to claim 3, characterized in that: Plasticine is provided in the area directly below point B on the upper surface of the plastic film; the height of the plasticine is the maximum thickness of the unqualified mold seam.

7. A wind turbine blade mold seam thickness detection device according to claim 3, characterized in that: The signal processor is composed of an electrical signal detection module, a data processing module, a data transmission module and a data storage module.

8. The detection method of a wind turbine blade mold seam thickness detection device according to claim 7, characterized in that: The method comprises the following steps: S1. Place the pressure-bearing body of the detection device in the die seam area of ​​the wind turbine blade, with the contact plate II in contact with the lower blade, and the power supply and signal processor away from the die seam area; S2, closing the upper mold and the lower mold of the wind turbine blade; S3, detecting N wires connected to the conductive contacts through an electrical signal detection module to obtain the codes of the conductive wires, and selecting the maximum value M of the codes; S4. Calculate the distance between the mold gaps using the data processing module according to the following formula: In the formula, h B is the distance from point B on contact plate I to contact plate II, b is the distance from point B on contact plate I to the rotation axis A, s1 is the thickness of contact plate I, s2 is the thickness of contact plate II, h M is the height of the conductive contact with code M, l M The distance from the conductive contact code M to the rotation axis A; S5, through the data transmission module H M The data is transmitted to the data storage module for recording, so as to obtain the die seam thickness at the location of the pressure-bearing body; S6, arranging multiple detection devices along the width direction of the blade mold seam, and obtaining the multi-point thickness values ​​along the width direction of the mold seam according to steps S1 to S5; S7, arranging a plurality of detection devices along the length direction of the blade mold seam, and obtaining the thickness values ​​at multiple points along the length direction of the mold seam according to steps S1 to S5.

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