Probe device and method for in-situ ultrasonic inspection of a blade

Abstract

A kind of probe device and method for in-situ ultrasonic flaw detection of blade, probe device includes surface wave ultrasonic probe, which is connected to ultrasonic flaw detector by cable, also includes extension rod and syringe;One end of the extension rod is provided with handle;The surface wave ultrasonic probe is installed on the end of the extension rod away from the handle;Soft coupling agent adsorption structure is provided on the surface of surface wave ultrasonic probe, coupling agent is stored in the syringe, and the coupling agent is water;The outlet end of the syringe is movably inserted into the hose, and the water outlet of the hose is arranged on the coupling agent adsorption structure.A kind of method for in-situ ultrasonic flaw detection of blade uses the above probe device.In the detection of flaw detection, the surface wave ultrasonic probe can be inserted into narrow part to detect the blade by holding the handle, simple structure, easy to use, easy to realize the coupling of ultrasonic flaw detection.Use water as coupling agent, no need to remove coupling agent after in-situ ultrasonic flaw detection.

Description

Technical Field

[0001] This invention relates to the field of flaw detection technology, and in particular to a probe device and method for in-situ ultrasonic flaw detection of blades. Background Technology

[0002] Non-destructive testing (NDT) is a method of inspecting the surface and internal quality of a component without damaging the workpiece or raw materials. Ultrasonic testing (UT), also known as ultrasonic testing, utilizes ultrasonic technology and is one of the five conventional NDT methods. Ultrasonic testing is frequently used in aero-engine manufacturing and in-service testing technologies.

[0003] During testing, a probe device is required, and most existing probe devices are handheld. Currently, in-situ ultrasonic testing of blades generally uses a handheld device, where the probe is held directly by hand and inspected on the part. The coupling agent is usually machine oil or grease. When space is limited at the part to be ultrasonically inspected, a special probe rod needs to be designed to deliver the surface wave ultrasonic probe to the part to be inspected. The difficulties are twofold: firstly, the coupling of ultrasonic testing is difficult; secondly, wiping off the coupling agent after inspection is also difficult. Summary of the Invention

[0004] The main objective of this invention is to provide a probe device and method for in-situ ultrasonic flaw detection of blades, aiming to solve the aforementioned technical problems.

[0005] To achieve the above objectives, this invention proposes a probe device for in-situ ultrasonic flaw detection of blades, comprising a surface wave ultrasonic probe connected to an ultrasonic flaw detector via a cable, an extension rod, and a syringe; one end of the extension rod is provided with a handle; the surface wave ultrasonic probe is mounted on the end of the extension rod away from the handle; a soft couplant adsorption structure is provided on the surface of the surface wave ultrasonic probe, and the syringe stores a couplant, which is water; the outlet end of the syringe is movably inserted into a flexible tube, and the outlet of the flexible tube is located on the couplant adsorption structure.

[0006] Preferably, the coupling agent adsorption structure is absorbent cotton or absorbent cloth.

[0007] Preferably, the extension rod is a hollow rigid structure, and the hose and cable pass through the interior of the extension rod from the end where the handle is located; a first hole and a second hole are provided on the rod wall near the surface wave ultrasonic probe; the cable passes through the first hole and connects to the surface wave ultrasonic probe; the hose passes through the second hole and connects to the coupling agent adsorption structure.

[0008] Preferably, the handle has a through hole in the middle, and the extension rod is inserted into the through hole in the middle of the handle; an anti-slip structure is provided on the outer peripheral surface of the handle.

[0009] Preferably, the anti-slip structure is an annular groove provided on the outer peripheral surface of the handle.

[0010] Preferably, the end of the extension rod away from the handle is flattened to form a flat portion, and the surface wave ultrasonic probe is mounted on a plane on one side of the flat portion.

[0011] Preferably, an elastic pad is provided between the surface wave ultrasonic probe and the flat portion, and the elastic pad is made of elastic foam.

[0012] Preferably, a limiting piece is provided at one end of the surface wave ultrasonic probe, and the lower end of the limiting piece extends downward and beyond the coupling agent adsorption structure.

[0013] On the other hand, the present invention also proposes a method for in-situ ultrasonic testing of blades, employing the above-mentioned probe device, comprising the following steps:

[0014] Step S1: First, turn on the power of the ultrasonic flaw detector and connect the cable to the ultrasonic flaw detector. Adjust the parameters of the ultrasonic flaw detector. Fill the syringe with water and connect it to the water pipe. Then immerse the surface wave ultrasonic probe in the water to completely wet the coupling agent adsorption structure.

[0015] Step S2: Couple the surface wave ultrasonic probe to the blade to be inspected, and observe the waveform on the display screen of the ultrasonic flaw detector. When the bottom wave decreases or disappears, add water with a syringe to avoid poor coupling between the surface wave ultrasonic probe and the blade, thus completing the ultrasonic flaw detection of the blade.

[0016] Preferably, in step S2, when performing flaw detection on the blade, a limiting piece is used to closely adhere to the leading edge of the blade and move along the leading edge of the blade for scanning.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] (1) In this invention, a surface wave ultrasonic probe is installed at one end of an extended rod and a handle is provided at the other end. When performing flaw detection, the surface wave ultrasonic probe can be inserted into a narrow part to detect the blade by holding the handle. The structure is simple, easy to use, and easy to achieve ultrasonic flaw detection coupling.

[0019] (2) In this invention, the coupling agent used is water. Using water as the coupling agent eliminates the need to remove the coupling agent after in-situ ultrasonic testing, thereby improving the quality and efficiency of in-situ ultrasonic testing and reducing the requirements for testing personnel.

[0020] (3) In this invention, by using a syringe to store water as a coupling agent, when the bottom wave decreases or disappears during flaw detection, water can be added to the absorbent cotton or absorbent cloth set on the surface wave ultrasonic probe through the syringe to avoid poor coupling between the surface wave ultrasonic probe and the blade, thus facilitating the completion of ultrasonic flaw detection of the blade. The water replenishment operation is convenient during the flaw detection process.

[0021] (4) In this invention, by setting a coupling agent adsorption structure, the material of which is water-absorbing cotton or water-absorbing cloth, a layer of water film can be formed on the contact surface between the surface wave ultrasonic probe and the blade, ensuring the coupling effect and preventing excessive water flow, which would cause interference.

[0022] (5) In this invention, by setting an elastic pad, the surface wave ultrasonic probe can be adaptively fitted to the blade to improve the ultrasonic coupling effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the probe device provided by the present invention.

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a top view schematic diagram of the surface wave ultrasonic probe and the coupling agent adsorption structure in this invention;

[0027] Figure 4 This is a schematic diagram of the probe device provided by the present invention coupled to the blade to be inspected.

[0028] Figure 5 This is an enlarged view of the probe device provided by the present invention coupled to the blade to be tested.

[0029] Explanation of reference numerals in the attached diagram: 1. Ultrasonic flaw detector; 2. Cable; 3. Limiting plate; 4. Blade; 5. Coupling agent adsorption structure; 6. Surface wave ultrasonic probe; 7. Elastic pad; 8. Extension rod; 8a. First hole; 8b. Second hole; 8c. Flat part; 9. Handle; 9a. Annular groove; 10. Hose; 11. Syringe. Detailed Implementation

[0030] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0033] Combination Figure 1 , Figure 2 As shown, a probe device for in-situ ultrasonic flaw detection of blades includes a surface wave ultrasonic probe 6, which is connected to an ultrasonic flaw detector 1 via a cable 2. It also includes an extension rod 8 and a syringe 11. One end of the extension rod 8 is provided with a handle 9. The surface wave ultrasonic probe 6 is mounted on the end of the extension rod 8 furthest from the handle 9. A soft couplant adsorption structure 5 is provided on the surface of the surface wave ultrasonic probe 6. The syringe 11 stores a couplant, which is water. The outlet end of the syringe 11 is movably inserted into a flexible tube 10, and the outlet of the flexible tube 10 is located on the couplant adsorption structure 5.

[0034] By adopting the above structure, during flaw detection, the surface wave ultrasonic probe 6 can be inserted into a narrow part to inspect the blade 4 simply by holding the handle 9. The structure is simple, easy to use, and facilitates ultrasonic flaw detection coupling. In addition, water is used as the coupling agent. Using water as the coupling agent eliminates the need to remove the coupling agent after in-situ ultrasonic flaw detection, thereby improving the quality and efficiency of in-situ ultrasonic flaw detection and reducing the requirements for inspection personnel.

[0035] In this embodiment, the coupling agent adsorption structure 5 is absorbent cotton or absorbent cloth. During testing, the absorbent cotton or absorbent cloth comes into contact with the blade 4 to be tested. By using a syringe 11 to store water as a coupling agent, when the bottom wave in the ultrasonic flaw detector 1 is observed to decrease or disappear during flaw detection, water can be added to the absorbent cotton or absorbent cloth placed on the surface wave ultrasonic probe 6 through the syringe 11. This avoids poor coupling between the surface wave ultrasonic probe 6 and the blade 4, facilitating the ultrasonic flaw detection of the blade 4. The water replenishment operation is convenient during the flaw detection process.

[0036] Combination Figure 1 , Figure 2 As shown, to facilitate the installation of the hose 10 and cable 2 and to prevent them from tangling with the workpiece during testing, the extension rod 8 is designed as a hollow structure. The hose 10 and cable 2 pass through the interior of the extension rod 8 from the end where the handle 9 is located. A first hole 8a and a second hole 8b are provided on the rod wall near the surface wave ultrasonic probe 6. The cable 2 passes through the first hole 8a and connects to the surface wave ultrasonic probe 6; the hose 10 passes through the second hole 8b and connects to the coupling agent adsorption structure 5. The hollow structure of the extension rod 8 provides space for accommodating the hose 10 and cable 2.

[0037] In this embodiment, a through hole is provided in the middle of the handle 9, and the extension rod 8 is inserted into the through hole in the middle of the handle 9; an anti-slip structure is provided on the outer peripheral surface of the handle 9. The through hole in the handle 9 facilitates the installation of the extension rod 8, and the anti-slip structure effectively prevents slippage when gripping. Specifically, the anti-slip structure is an annular groove 9a provided on the outer peripheral surface of the handle 9.

[0038] Combination Figure 2 As shown, to facilitate the mounting of the surface wave ultrasonic probe 6 on the end of the extension rod 8, the end of the extension rod 8 away from the handle 9 is designed to be flattened to form a flat portion 8c. The surface wave ultrasonic probe 6 is mounted on a flat surface on one side of the flat portion 8c. This structure allows the side of the flat portion 8c to form a planar structure, facilitating the mounting of the surface wave ultrasonic probe 6. Furthermore, during detection, to improve the coupling effect and increase adaptability, an elastic pad 7 is provided between the surface wave ultrasonic probe 6 and the flat portion 8c. The elastic pad 7 is made of elastic foam, allowing the surface wave ultrasonic probe 6 to adaptively fit the blade 4.

[0039] Combination Figure 2As shown, a limiting piece 3 is located at one end of the surface wave ultrasonic probe 6. The lower end of the limiting piece 3 extends downward and beyond the coupling agent adsorption structure 5. After the surface wave ultrasonic probe 6 is limited by the limiting piece 3, it is convenient for the surface wave ultrasonic probe 6 to move on the blade 4 to complete the detection.

[0040] On the other hand, this embodiment also provides a method for in-situ ultrasonic testing of blades, using the above-mentioned probe device, including the following steps:

[0041] Step S1: First, turn on the power of the ultrasonic flaw detector 1 and connect the cable 3 to the ultrasonic flaw detector 1. Adjust the parameters of the ultrasonic flaw detector 1. Fill the syringe 11 with water and connect it to the water pipe 10. Then immerse the surface wave ultrasonic probe 6 in the water to completely wet the coupling agent adsorption structure 5. Then the flaw detection can be started.

[0042] Step S2: Couple the surface wave ultrasonic probe 6 to the blade 4 to be tested, and observe the waveform on the display screen of the ultrasonic flaw detector 1. When the bottom wave decreases or disappears, add water through the syringe 11 to avoid poor coupling between the surface wave ultrasonic probe 6 and the blade 4, and complete the ultrasonic flaw detection of the blade 4.

[0043] Once one blade 4 has been scanned, the next blade 4 can be scanned without treating the coupling agent water.

[0044] Furthermore, in step S2, when performing flaw detection on the blade 4, the limiting piece 3 is used to closely adhere to the leading edge of the blade 4 and move along the leading edge of the blade 4 for scanning.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for in-situ ultrasonic testing of blades, employing a probe device for in-situ ultrasonic testing of blades, the probe device comprising a surface wave ultrasonic probe (6), the surface wave ultrasonic probe (6) being connected to an ultrasonic flaw detector (1) via a cable (2), characterized in that: It also includes an extension rod (8) and a syringe (11); One end of the extension rod (8) is provided with a handle (9); the surface wave ultrasonic probe (6) is installed on the end of the extension rod (8) away from the handle (9); A soft coupling agent adsorption structure (5) is provided on the surface of the surface wave ultrasonic probe (6). The syringe (11) stores coupling agent, which is water. The outlet end of the syringe (11) is movably inserted into the hose (10), and the outlet of the hose (10) is provided on the coupling agent adsorption structure (5). The coupling agent adsorption structure (5) is absorbent cotton or absorbent cloth; The end of the extension rod (8) away from the handle (9) is flattened to form a flat part (8c), and the surface wave ultrasonic probe (6) is mounted on the plane on one side of the flat part (8c). A limiting piece (3) is provided at one end of the surface wave ultrasonic probe (6), and the lower end of the limiting piece (3) extends downward and beyond the coupling agent adsorption structure (5). The method includes the following steps: Step S1: First, turn on the power of the ultrasonic flaw detector (1) and connect the cable to the ultrasonic flaw detector (1). Adjust the parameters of the ultrasonic flaw detector (1). Fill the syringe (11) with water and connect it to the hose (10). Then immerse the surface wave ultrasonic probe (6) in the water to completely wet the coupling agent adsorption structure (5). Step S2: Couple the surface wave ultrasonic probe (6) to the blade (4) to be tested, and observe the waveform on the display screen of the ultrasonic flaw detector (1). When the bottom wave decreases or disappears, add water through the syringe (11) to avoid poor coupling between the surface wave ultrasonic probe (6) and the blade (4) and complete the ultrasonic flaw detection of the blade (4). In step S2, when the blade is inspected for flaws, the limiting piece (3) is used to closely adhere to the leading edge of the blade (4) and move along the leading edge of the blade (4) for scanning.

2. The method for in-situ ultrasonic flaw detection of blades as described in claim 1, characterized in that: The extension rod (8) is a hollow rigid structure. The hose (10) and cable (2) pass through the interior of the extension rod (8) from the end where the handle (9) is located. A first hole (8a) and a second hole (8b) are provided on the rod wall near the surface wave ultrasonic probe (6). The cable (2) passes through the first hole (8a) and is connected to the surface wave ultrasonic probe (6); The hose (10) extends out of the second hole (8b) and connects to the coupling agent adsorption structure (5).

3. The method for in-situ ultrasonic flaw detection of blades as described in claim 1, characterized in that: The handle (9) has a through hole in the middle, and the extension rod (8) is inserted into the through hole in the middle of the handle (9); an anti-slip structure is provided on the outer circumference of the handle (9).

4. The method for in-situ ultrasonic flaw detection of blades as described in claim 3, characterized in that: The anti-slip structure is an annular groove (9a) on the outer circumferential surface of the handle (9).

5. The method for in-situ ultrasonic flaw detection of blades as described in claim 1, characterized in that: An elastic pad (7) is provided between the surface wave ultrasonic probe (6) and the flat portion (8c), and the elastic pad (7) is made of elastic foam.

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