A blade array eddy current testing simulation device

Abstract

The application belongs to the technical field of array eddy current testing simulation, and relates to a kind of simulation device suitable for blade array eddy current testing.The application comprises a bottom plate, a fixing assembly for fixing blades, and a detection assembly;the detection assembly comprises a rubber ball, an air bag, a second ball joint, a clamp, and a probe head;the lower end of the rubber ball is connected with a third telescopic rod, the output end of the third telescopic rod is connected with the clamp through the second ball joint;the air bag is connected with the rubber ball through a plurality of connecting rods.The side of the air bag first contacts the blade, the side of the air bag first contacting the blade pushes the rubber ball through the connecting rods, so that the rubber ball is elastically deformed, and the direction of the probe head is adjusted.The probe head tends to be perpendicular to the blade when the air bag is attached to the blade.The attachment of the probe head to the blade is further improved through the action of the second ball joint and the second spring, which is conducive to improving the quality of simulation testing and facilitating rapid simulation testing of parts with small surface curvature of the blade.

Description

Technical Field

[0001] This invention belongs to the field of array eddy current detection simulation technology, and relates to a simulation device for eddy current detection of blade arrays. Background Technology

[0002] Eddy current testing is a non-destructive testing method that utilizes the principle of electromagnetic induction to non-destructively evaluate certain properties of conductive materials and workpieces, or to detect defects, by measuring changes in induced eddy currents within the workpiece under inspection. Array eddy current testing probes consist of multiple independent coils, allowing a larger area to be covered in a single probe scan. Customized probes can also be designed to inspect complex workpieces based on their contours.

[0003] An array eddy current testing instrument mainly consists of a probe head, a main unit, and a display. The probe head is a crucial component of the instrument, and its quality directly affects the testing results. Therefore, the probe head needs to be tested using simulation to determine its compliance. In simulation testing of eddy currents applicable to blade arrays, to improve the accuracy of the simulation, the distance between each point of the probe head and the blade surface must be equal. Since the blade surface is curved, it is difficult for the probe head to simultaneously adapt to surfaces with different curvatures, thus affecting the simulation test results.

[0004] To address the aforementioned problems, this invention proposes a simulation device for eddy current detection of blade arrays. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention proposes a simulation device for eddy current detection of blade arrays.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A simulation device for eddy current detection of blade arrays includes a base plate, a fixing component for fixing blades, and a detection component; the fixing component is disposed on the base plate;

[0007] The detection assembly includes a rubber ball, an airbag, a second ball joint, a clamp, and a probe. A slider is movably mounted on the top of the base plate, and a second telescopic rod is installed at the lower end of the slider. The rubber ball is installed at the output end of the second telescopic rod. A third telescopic rod is connected to the lower end of the rubber ball, and the output end of the third telescopic rod is connected to the clamp via the second ball joint. The clamp is used to install the probe. The airbag is annular and located below the rubber ball. The airbag and the rubber ball are connected by multiple connecting rods, which are distributed along the circumference of the airbag.

[0008] Furthermore, the rubber ball is a hollow ball.

[0009] Furthermore, a second spring is fixedly connected between the third telescopic rod and the clamp, and the second spring is sleeved on the second ball joint.

[0010] Furthermore, the fixing component includes a suction cup, a slide rod, and a first ball joint; a first sliding groove is vertically formed on the base plate, and the slide rod is slidably disposed in the first sliding groove; the suction cup is vertically mounted on the upper end of the slide rod through the first ball joint;

[0011] A first spring is fitted onto the slide rod. One end of the first spring is fixedly connected to the suction cup, and the other end of the first spring is fixedly connected to the base plate.

[0012] Furthermore, two support frames are symmetrically fixedly installed on the base plate, and a sliding frame is slidably connected between the two support frames. The slider is slidably set on the sliding frame and slides along the length direction of the sliding frame.

[0013] Furthermore, the base plate is symmetrically provided with two placement blocks, and each of the two placement blocks has a placement groove on its opposite side.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Due to the curved surface of the blade, one side of the airbag contacts the blade first. As the airbag continues to move downwards, the side that initially contacts the blade pushes a rubber ball via a connecting rod, causing the rubber ball to deform elastically. This adjusts the orientation of the probe. When the airbag is in contact with the blade, the probe tends to point perpendicularly to the blade, facilitating full contact between the probe and the blade. This adjustment method is simple and quick, improving the efficiency of simulated detection and thus enhancing the efficiency of probe inspection.

[0016] 2. During the process of the probe fitting with the blade, the second ball joint and the second spring further improve the fit between the probe and the blade, which is beneficial to improving the simulation quality and also facilitates rapid simulation detection of parts of the blade surface with small curvature. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 In this invention Figure 1 Enlarged view of part A;

[0019] Figure 3 In this invention Figure 2 Enlarged view of part B;

[0020] Figure 4 In this invention Figure 1 Enlarged view of part C;

[0021] Figure 5 This is a schematic diagram of the installation of the clamp in this invention;

[0022] Figure 6 This is a schematic diagram of the structure of the fixing component in this invention.

[0023] In the diagram: 1. Base plate; 2. Placement block; 3. Suction cup; 4. Sliding rod; 5. First ball joint; 6. First spring; 7. Support frame; 8. First telescopic rod; 9. Sliding frame; 10. Motor; 11. Lead screw; 12. Slider; 13. Second telescopic rod; 14. Rubber ball; 15. Connecting rod; 16. Airbag; 17. Third telescopic rod; 18. Connecting plate; 19. Second ball joint; 20. Clamp; 21. Second spring; 22. Probe head. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-6 As shown, the technical solution adopted by the present invention is as follows: a simulation device for eddy current detection of blade arrays, comprising a base plate 1, a fixing component and a detection component.

[0026] Mounting feet are fixedly installed at the lower end of the base plate 1 to maintain the base plate 1 at a certain height. Placement blocks 2 are symmetrically fixedly installed on the base plate 1, with placement slots provided on opposite sides of each placement block 2. During testing, the blade is placed between the two placement blocks 2, ensuring that both sides of the blade are placed in the corresponding placement slots.

[0027] There are two fixing components, both of which are slidably mounted on the base plate 1. Each fixing component includes a suction cup 3, a sliding rod 4, and a first ball joint 5. The base plate 1 has a vertically formed first sliding groove, and the sliding rod 4 is slidably mounted within the first sliding groove. The suction cup 3 is vertically mounted on the upper end of the sliding rod 4 via the first ball joint 5. A first spring 6 is fitted onto the sliding rod 4, with one end of the first spring 6 fixedly connected to the suction cup 3 and the other end of the first spring 6 fixedly connected to the base plate 1.

[0028] When the blade is placed on the suction cup 3, the blade contacts the suction cup 3. Due to the curved surface of the blade, one side of the blade contacts the suction cup 3 first. The blade pushes the suction cup 3, causing the suction cup 3 to deflect around the slide rod 4 via the first ball joint 5, thus making the suction cup 3 completely adhere to the blade. The blade pushes the slide rod 4 via the first ball joint 5, causing the slide rod 4 to move downwards until the blade contacts the placement block 2. At the same time, the first spring 6 undergoes elastic deformation and acquires elastic potential energy, causing the suction cup 3 to adhere tightly to the blade and adhere and fix the blade.

[0029] Two support frames 7 are symmetrically mounted on the base plate 1. A sliding frame 9 is slidably connected between the two support frames 7. Specifically, each support frame 7 has a limit groove, and limit blocks are fixedly installed at both ends of the sliding frame 9, with the limit blocks slidingly connected to the limit groove on the same side. A first telescopic rod 8 is fixedly installed on each support frame 7. The output end of the first telescopic rod 8 is fixedly connected to the sliding frame 9. The first telescopic rod 8 drives the sliding frame 9 to slide along the support frame 7.

[0030] The detection component is slidably mounted on the sliding frame 9. The sliding frame 9 has a second sliding groove along its length, within which a slider 12 is slidably positioned. The detection component is fixedly mounted on the lower end of the slider 12. Specifically, a lead screw 11 is rotatably mounted within the second sliding groove, and the lead screw 11 is threadedly connected to the slider 12. A motor 10 is fixedly mounted on one end of the sliding frame 9, and the motor 10 is driven by the lead screw 11.

[0031] The detection assembly includes a probe head 22, a third telescopic rod 17, a rubber ball 14, an airbag 16, and a second ball joint 19.

[0032] A second telescopic rod 13 is fixedly connected to the lower end of slider 12, with the output end of the second telescopic rod 13 facing downwards. A rubber ball 14 is fixedly installed at the lower end of the second telescopic rod 13. The rubber ball 14 is a hollow sphere with elastic deformation capability. A third telescopic rod 17 is fixedly installed at the lower end of the rubber ball 14, and a connecting plate 18 is fixedly installed at the lower end of the third telescopic rod 17. The connecting plate 18 is connected to a clamp 20 via a second ball joint 19. The clamp 20 is conventional prior art and will not be described in detail here. A second spring 21 is sleeved on the second ball joint 19, and the second spring 21 is fixedly connected between the connecting plate 18 and the clamp 20. A detection head 22 is installed on the clamp 20. The detection head 22 is an array eddy current detection head to be tested.

[0033] The airbag 16 is annular. The airbag 16 is located below the rubber ball 14. Multiple connecting rods 15 are fixedly connected to the lower part of the rubber ball 14, and the other end of the connecting rods 15 is fixedly connected to the inner side of the airbag 16.

[0034] During testing, the second telescopic rod 13 is extended, causing the lower end of the airbag 16 to contact the upper surface of the blade to be tested. Since the blade has an arc-shaped surface, one side of the airbag 16 initially contacts the blade. As the airbag 16 continues to move, it compresses the rubber ball 14 via the connecting rod 15, causing the rubber ball 14 to elastically deform. This causes the third telescopic rod 17 to point perpendicularly to the blade. Then, by extending the third telescopic rod 17, the probe head 22 contacts the blade to perform simulated testing.

[0035] Working principle: Initially, under the action of the first spring 6, the height of the suction cup 3 is higher than the height of the placement block 2.

[0036] In use, the blade with standard cracks is placed on the suction cup 3, and the blade moves downward under the action of gravity. Due to the curved surface of the blade, one side of the blade contacts the suction cup 3 first. The blade pushes the suction cup 3, causing the suction cup 3 to deflect around the slide rod 4 via the first ball joint 5, thus making the suction cup 3 completely adhere to the blade. The blade pushes the slide rod 4 via the first ball joint 5, causing the slide rod 4 to move downward until the blade contacts the placement block 2, and both sides of the blade are located in the two placement slots respectively. At the same time, the first spring 6 is compressed and has elastic potential energy, thus making the suction cup 3 adhere tightly to the blade and adsorb and fix the blade.

[0037] Then, the probe 22 is mounted onto the clamp 20. The motor 10 and the first telescopic rod 8 are started, moving the detection assembly directly above the blade crack.

[0038] Then, the second telescopic rod 13 is extended, causing the detection assembly to move closer to the blade. One side of the airbag 16 first contacts the blade. As the airbag 16 continues to move, the side of the airbag 16 that initially contacts the blade compresses the rubber ball 14 via the connecting rod 15, causing the rubber ball 14 to elastically deform. The rubber ball 14 then drives the third telescopic rod 17 to move. Consequently, the third telescopic rod 17 tends to point perpendicularly to the blade, and the airbag 16 gradually comes into full contact with the blade. Afterward, the second telescopic rod 13 is stopped, and the third telescopic rod 17 is activated. This causes the probe 22 to gradually come into contact with the blade, and then the cracks on the blade are detected. During the process of the probe 22 coming into contact with the blade, the clamp 20 can also swing relative to the third telescopic rod 17 via the second ball joint 19 to further adjust the probe 22, improve the contact between the probe 22 and the blade, and improve the quality of the simulated detection. At the same time, the second spring 21 generates elastic deformation and has elastic potential energy, which helps to keep the probe 22 in contact with the blade.

[0039] If the blade curvature is small, the probe 22 can be extended to a certain distance below the airbag 16 directly via the third telescopic rod 17. Then, the second telescopic rod 13 is activated, causing the probe 22 to move closer to the blade. When the probe 22 contacts the blade, the side of the probe 22 that first contacts the blade pushes the probe 22 to swing relative to the third telescopic rod 17 through the second ball joint 19. As the second telescopic rod 13 continues to extend, the probe 22 gradually comes into full contact with the blade. At the same time, the second spring 21 undergoes elastic deformation, which helps to keep the probe 22 in contact with the blade.

[0040] Afterwards, the probe 22 is connected to the main unit of the eddy current detector. The probe 22 simulates the detection of blade cracks. The main unit of the eddy current detector analyzes the detected data and displays the detection curve on the display. The detection curve is compared with the standard curve to determine whether the probe 22 is qualified.

[0041] When the surface curvature of the blade is large, the device adjusts the orientation of the probe 22 using the airbag 16 and the rubber ball 14. This adjustment method is simple and quick, which helps improve simulation efficiency and thus improves the efficiency of probe inspection. During the contact process between the probe 22 and the blade, the second ball joint 19 and the second spring 21 further improve the contact degree between the probe 22 and the blade, which helps improve the quality of simulation detection and also facilitates rapid simulation detection of areas with small surface curvature on the blade.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A simulation device for eddy current detection of blade arrays, characterized in that: Includes a base plate (1), a fixing assembly for fixing the blades, and a detection assembly; The fixing assembly is set on the base plate (1); the detection assembly includes a rubber ball (14), an airbag (16), a second ball joint (19), a clamp (20), and a probe (22); a slider (12) is movably set above the base plate (1), a second telescopic rod (13) is installed at the lower end of the slider (12), and the rubber ball (14) is installed at the output end of the second telescopic rod (13); the lower end of the rubber ball (14) is connected to a third telescopic rod (17), and the output end of the third telescopic rod (17) is connected to the clamp (20) through the second ball joint (19). The clamp (20) is used to install the probe (22); the airbag (16) is annular, and the airbag (16) is located below the rubber ball (14). The airbag (16) and the rubber ball (14) are connected by multiple connecting rods (15), and the multiple connecting rods (15) are distributed along the circumference of the airbag (16).

2. The eddy current detection simulation device for blade arrays according to claim 1, characterized in that: The rubber ball (14) is a hollow ball.

3. The eddy current detection simulation device for blade arrays according to claim 1, characterized in that: A second spring (21) is fixedly connected between the third telescopic rod (17) and the clamp (20), and the second spring (21) is sleeved on the second ball joint (19).

4. The eddy current detection simulation device for blade arrays according to claim 1, characterized in that: The fixing components include a suction cup (3), a slide rod (4), and a first ball joint (5); a first sliding groove is vertically provided on the base plate (1), and the slide rod (4) is slidably disposed in the first sliding groove; the suction cup (3) is vertically installed on the upper end of the slide rod (4) through the first ball joint (5); a first spring (6) is sleeved on the slide rod (4), one end of the first spring (6) is fixedly connected to the suction cup (3), and the other end of the first spring (6) is fixedly connected to the base plate (1).

5. The eddy current detection simulation device for blade arrays according to claim 1, characterized in that: Two support frames (7) are symmetrically fixed on the base plate (1). A sliding frame (9) is slidably connected between the two support frames (7). The slider (12) is slidably set on the sliding frame (9) and slides along the length direction of the sliding frame (9).

6. The eddy current detection simulation device for blade arrays according to claim 4, characterized in that: The base plate (1) is symmetrically provided with two placement blocks (2), and each of the two placement blocks (2) has a placement groove on its opposite side.

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