A device for detecting surface defects of first-stage blades of a turbofan aircraft engine

Abstract

The present invention relates to the technical field of aircraft engine detection equipment, and in particular to a surface defect detection device for the first-stage fan blades of a turbofan aircraft engine. The first-stage fan blade surface defect detection device provided by the present invention is simple in structure and convenient in operation, realizing the automation of the surface defect detection process of the first-stage fan blades of a turbofan aircraft engine, improving work efficiency and saving costs, because it is provided with an image acquisition and processing component for acquiring images of the front and back sides of each blade in the first-stage fan blade, an image driving mechanism for driving the image acquisition and processing component to move laterally, lift and retract, a toggle component for toggling the blades in the first-stage fan blade, a toggle driving mechanism for driving the toggle component to rotate and retract, and a bearing mechanism for carrying the image driving mechanism and the toggle driving mechanism and driving the image driving mechanism and the toggle driving mechanism to move.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine detection equipment, and in particular to a device for detecting surface defects of first-stage blades of a turbofan aero-engine. Background Art

[0002] A turbofan engine, also known as a turbofan engine, is a gas turbine aircraft engine. Compared with a traditional turbojet engine, a turbofan engine has an increased first-stage blade area and an outer duct structure. The first-stage blades have both the function of a propeller and compressed air. The outer part of the air provides direct thrust through the outer duct of the jet engine, and the inner part of the air is sent into the combustion chamber through the inner duct. The inner and outer ducts provide dual thrust supply. Therefore, the first-stage blades of a turbofan aircraft engine are one of the key components of the engine. The surface defect detection of the first-stage blades is an important area of ​​aircraft engine maintenance and inspection, which directly affects the propulsion efficiency and safety of the engine.

[0003] At present, the surface defect detection of the first-stage blades of turbofan aircraft engines is the responsibility of professional inspectors. The inspectors slowly crawl towards the aircraft engine through the narrow air intake duct and judge whether the first-stage blades have surface defects and other defects by touching and observing with their eyes. There are dozens of blades in the first-stage blades of turbofan aircraft engines. During the inspection process, the inspectors need to rotate the blades with both hands and inspect them one by one. Manual inspection is not only difficult, but also inefficient, time-consuming and laborious. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a device for detecting surface defects of the first-stage blades of a turbofan aircraft engine, thereby improving the detection efficiency of the first-stage blades in a turbofan aircraft engine.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] An embodiment of the present invention provides a surface defect detection device for the first-stage fan blades of a turbofan aircraft engine, comprising: an image acquisition and processing component, used to acquire images of the front and back sides of each blade in the first-stage fan blades; an image drive mechanism, used to drive the image acquisition and processing component to move laterally, lift and lower, and telescopically so that the image acquisition and processing component can enter the interior of the aircraft engine; a toggle component, used to toggle the blades in the first-stage fan blades; a toggle drive mechanism, used to drive the toggle component to rotate and telescopically move so that the toggle component can engage the blades; and a bearing mechanism, used to bear the image drive mechanism and the toggle drive mechanism, and drive the image drive mechanism and the toggle drive mechanism to move.

[0009] Preferably, the image acquisition and processing component includes a first camera, a second camera and a processing unit; the first camera is arranged on an image driving mechanism, and the image driving mechanism drives the first camera to move to the front of the blade to capture the front image of the blade; the second camera is arranged on the image driving mechanism through a mounting seat, and the image driving mechanism drives the second camera to pass through the gap between the two blades and move to the rear of the first-stage fan blade to capture the back image of the blade; the first camera and the second camera respectively send the collected front image and back image information to the processing unit; the processing unit obtains and processes the front image and back image information.

[0010] Preferably, the image driving mechanism includes a transverse moving component, an electric push rod assembly and a rotating bracket; the transverse moving component includes a transverse moving slide rail connected to the top end of the supporting mechanism and a slider slidably connected to the transverse moving slide rail; the electric push rod assembly includes a connected electric cylinder and a telescopic push rod; the two ends of the rotating bracket are respectively rotatably connected to the slider and the electric cylinder; the image driving mechanism also includes an angle sensor arranged in the electric cylinder, and the angle sensor keeps the electric push rod assembly in a horizontal state.

[0011] Preferably, the first camera is arranged at the front end of the telescopic push rod, and the second camera is arranged on the front end side wall of the telescopic push rod through a mounting seat.

[0012] Preferably, the toggle mechanism includes a support frame, a track and multiple rotating shafts; the support frame is connected to the toggle drive mechanism, the support frame is open at one end away from the toggle drive mechanism, multiple rotating shafts are arranged in the opening at intervals and the multiple rotating shafts are rotatably connected to the support frame; the track is rollingly connected to the rotating shaft; and multiple toggle columns are equidistantly arranged on the track.

[0013] Preferably, the toggle post is made of elastic material.

[0014] Preferably, the toggle mechanism further comprises a blade counter; the blade counter is arranged on one side of the support frame to count the number of the toggle blades.

[0015] Preferably, the toggle drive mechanism includes a slide base arranged inside the supporting mechanism, a slide slidably connected to the slide base, and a telescopic component arranged on the slide; one end of the telescopic component extends out of the supporting mechanism, and the toggle component is rotatably connected to the end of the telescopic component.

[0016] Preferably, the bearing mechanism includes a mobile base and four rollers arranged on the mobile base; the image driving mechanism is arranged on the top of the mobile base; the toggle driving mechanism is arranged inside the mobile base and one end of the toggle driving mechanism extends out of the mobile base.

[0017] Preferably, the carrying mechanism further comprises at least two groups of distance measuring sensor units, which are arranged at intervals along the moving direction of the carrying mechanism; each distance measuring sensor unit comprises two distance measuring sensors, which are respectively arranged on both sides of the moving base.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a first-stage fan blade surface defect detection device for a turbofan aircraft engine. The device is provided with an image acquisition and processing component for acquiring images of the front and back sides of each blade in the first-stage fan blade, an image driving mechanism for driving the image acquisition and processing component to move laterally, lift and retract, a toggle component for toggling the blades in the first-stage fan blade, a toggle driving mechanism for driving the toggle component to rotate and retract, and a bearing mechanism for bearing the image driving mechanism and the toggle driving mechanism and driving the image driving mechanism and the toggle driving mechanism to move. Therefore, the device has a simple structure and is easy to operate, thereby realizing the automation of the first-stage fan blade surface defect detection process of the turbofan aircraft engine, improving work efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the first-stage fan blade surface defect detection device of the turbofan aircraft engine of the present invention;

[0022] Figure 2 for Figure 1 The structural diagram of the image acquisition and processing component and the image driving mechanism;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the toggle assembly;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of the toggle drive mechanism;

[0025] Figure 5 for Figure 1 Structural diagram of the middle bearing mechanism;

[0026] Figure 6 It is a schematic diagram of the structure of an aircraft engine;

[0027] Figure 7 for Figure 6 Middle partial schematic diagram;

[0028] Figure 8 This is a schematic diagram of the structure of the first-stage fan blades;

[0029] Fig. 9It is a structural schematic diagram of the toggle assembly extending into the interior of the aircraft engine (the image acquisition and processing assembly and the image drive mechanism are not shown);

[0030] Fig.10 It is a structural schematic diagram of the toggle assembly to toggle blades;

[0031] Fig.11 This is a schematic diagram of the working status of the surface defect detection device for the first-stage fan blades of a turbofan aircraft engine (the air intake duct of the aircraft engine is not shown).

[0032] [Description of Reference Numerals]

[0033] 1: image acquisition and processing component; 11: first camera; 12: second camera; 13: mounting base;

[0034] 2: Image driving mechanism; 21: Lateral moving assembly; 211: Lateral moving slide rail; 212: Sliding block; 22: Electric push rod assembly; 221: Electric cylinder; 222: Telescopic push rod; 23: Rotating bracket;

[0035] 3: toggle assembly; 31: support frame; 32: crawler; 33: rotating shaft; 34: toggle column; 35: blade counter; 36: toggle motor;

[0036] 4: toggle drive mechanism; 41: slide base; 42: slide; 43: telescopic assembly; 431: telescopic cylinder; 432: telescopic rod; 44: rotating motor;

[0037] 5: bearing mechanism; 51: mobile base; 52: roller; 53: distance sensor;

[0038] 6: aircraft engine; 61: air inlet; 62: support plate; 63: first-stage fan blades; 631: blades. DETAILED DESCRIPTION

[0039] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] like Figure 1 As shown, an embodiment of the present invention provides a surface defect detection device for the first-stage blades of a turbofan aircraft engine, comprising an image acquisition and processing component 1, an image drive mechanism 2, a toggle component 3, a toggle drive mechanism 4 and a supporting mechanism 5.

[0041] The image acquisition and processing component 1 is used to acquire the front and back images of each blade 631 in the first-stage fan blade 63, and the image drive mechanism 2 is used to drive the image acquisition and processing component 1 to move horizontally, lift and retract, so that the image acquisition and processing component can enter the interior of the aircraft engine 6. The toggle component 3 is used to toggle the blades 631 in the first-stage fan blade 63, and the toggle drive mechanism 4 is used to drive the toggle component 3 to rotate and retract so that the toggle component 3 extends into the support plate 62 of the aircraft engine 6 and rotates to the initial working position to clamp the blade. The bearing mechanism 5 is used to carry the image drive mechanism 2 and the toggle drive mechanism 4 and drive the image drive mechanism 2 and the toggle drive mechanism 4 to move, thereby driving the image acquisition and processing component 1 and the toggle component 3 to enter the air intake duct 61 of the aircraft engine 6. Figure 6 shows a schematic diagram of an aircraft engine 6, Figure 7 A support plate 62 in an aircraft engine 6 is shown. Figure 8 The first-stage fan blades 63 of the aircraft engine 6 are shown.

[0042] The first-stage blade surface defect detection device of a turbofan aircraft engine of the present invention has a simple structure and is easy to operate, and realizes the automation of the first-stage blade surface defect detection process of the turbofan aircraft engine, improves work efficiency, and saves costs. The first-stage blade surface defect detection device of a turbofan aircraft engine is used to detect the first-stage blade of a turbofan aircraft engine in an installed state, and improves the problem that the inspection of the first-stage blade of a turbofan aircraft engine in the prior art requires a worker to climb into the air inlet 61 to manually complete the inspection, which is inefficient and has a small inspection space.

[0043] like Figure 2 As shown, the image acquisition and processing component 1 includes a first camera 11, a second camera 12 and a processing unit. The first camera 11 is arranged on the image driving mechanism 2. The image driving mechanism 2 drives the first camera 11 to move to the front of the blade 631 to collect the front image of the blade 631. The second camera 12 is arranged on the image driving mechanism 2 through the mounting seat 13. The image driving mechanism 2 drives the second camera 12 to pass through the gap between the two blades 631 and move to the rear of the first-stage fan blade 63 to collect the back image of the blade 631. The first camera 11 and the second camera 12 send the collected front image and back image information to the processing unit respectively. The processing unit obtains the front image and back image information, and compares the obtained front image and back image information with the pre-stored complete blade 631 information to determine whether the detected blade 631 has defects.

[0044] like Figure 2As shown, the image driving mechanism 2 includes a lateral movement component 21, an electric push rod component 22, a rotating bracket 23 and an angle sensor. The lateral movement component 21 includes a lateral movement slide rail 211 connected to the top of the bearing mechanism 5 and a slider 212 slidably connected to the lateral movement slide rail 211. The electric push rod component 22 includes a connected electric cylinder 221 and a telescopic push rod 222. The first camera 11 is arranged at the front end of the telescopic push rod 222. The second camera 12 is arranged on the front end side wall of the telescopic push rod 222 through the mounting seat 13. The electric push rod component 22 can drive the first camera 11 and the second camera 12 to telescopically move.

[0045] The two ends of the rotating bracket 23 are rotatably connected to the slider 212 and the electric cylinder 221, respectively. The rotating bracket 23 includes two rotating plates, which are respectively arranged on both sides of the slider 212 and the electric cylinder 221, and the two ends of the rotating plates are respectively rotatably connected to the slider and the electric cylinder 221. In the actual application process, the angle sensor is arranged in the electric cylinder 221, and the angle sensor keeps the electric push rod assembly 22 in a horizontal state during the operation of the rotating bracket 23. Among them, the lateral movement component 21 is used for the lateral movement of the image acquisition processing component 1 on the electric push rod assembly 22 to adjust the horizontal position of the first camera 11 and the second camera 12 extending into the aircraft engine 6. During the rotation process, the rotating bracket 23 drives the image acquisition processing component 1 on the electric push rod assembly 22 to move up and down to adjust the upper and lower positions of the first camera 11 and the second camera 12 extending into the aircraft engine 6.

[0046] In this embodiment, due to the use of the rotating bracket 23, the rotating bracket 23 rotates clockwise in the initial position to lower the electric push rod assembly 22 to the lowest position, thereby reducing the overall height of the first-stage fan blade surface defect detection device of the turbofan aircraft engine to facilitate access to the engine air intake. At the same time, it should be noted that the lowest position of the electric push rod assembly 22 should be at least equal to or lower than the plane where the center of the first-stage fan blade 63 is located, and the highest position of the electric push rod assembly 22 should be at least equal to or higher than the highest position of the first-stage fan blade 63, so as to ensure that the image acquisition and processing component 1 on the electric push rod assembly 22 can fully collect information on the fan blade.

[0047] like Figure 3 , Fig. 9 and Fig.10As shown, the toggle mechanism includes a support frame 31, a track 32 and a plurality of rotating shafts 33. The support frame 31 is connected to the toggle drive mechanism 4. One end of the support frame 31 away from the toggle drive mechanism 4 is open. A plurality of rotating shafts 33 are arranged in the opening at intervals and are rotatably connected to the support frame 31. The track 32 is rollingly connected to the rotating shaft 33. A plurality of toggle posts 34 are arranged at equal intervals on the track 32. In actual application, the track 32 is a perforated track 32. The toggle posts 34 are installed on the surface of the perforated track 32 to clamp the blade 631 during the toggle process, so as to apply a rotational torque to the blade 631. The toggle posts 34 are made of elastic material to avoid damage to the blade 631.

[0048] Of course, the toggle mechanism also includes a toggle motor 36 and a blade counter 35. The toggle motor 36 is installed inside the support frame 31 to drive the crawler 32 to rotate. The blade counter 35 is arranged on one side of the support frame 31 to count the number of the toggled blades 631.

[0049] like Figure 4 As shown, the toggle drive mechanism 4 includes a slide 42 base 41 disposed inside the bearing mechanism 5, a slide 42 slidably connected to the slide 42 base 41, a telescopic assembly 43 disposed on the slide 42, and a rotary motor 44 driving the toggle assembly 3 to rotate, one end of the telescopic assembly 43 extends out of the bearing mechanism 5, and the toggle assembly 3 is rotatably connected to the end of the telescopic assembly 43. The telescopic assembly 43 includes a telescopic cylinder 431 and a telescopic rod 432, and the rotary motor 44 is disposed at the end of the telescopic rod 432 and connected to the support frame 31 of the toggle assembly 3, and the rotary motor 44 is used to drive the rotation of the support frame 31 to adjust the angle between the toggle assembly 3 and the blade 631.

[0050] The sliding base and the slide 42 are used to drive the toggle assembly 3 on the telescopic assembly 43 to perform the first stage of telescoping, i.e., long-distance movement. The telescopic assembly 43 is used to drive the toggle assembly 3 on the telescopic rod 432 to perform the second stage of telescoping, i.e., to fine-tune the position of the toggle assembly 3, so that the toggle assembly 3 can find a suitable distance near the blade 631 of the aircraft engine 6.

[0051] In this embodiment, a control device is further provided inside the mobile base 51 , and the control device is electrically connected to the image acquisition and processing component 1 , the image driving mechanism 2 , the toggle component 3 , the toggle driving mechanism 4 and the supporting mechanism 5 , respectively.

[0052] like Figure 5 As shown, the supporting mechanism 5 includes a mobile base 51 and four rollers 52 arranged on the mobile base 51, the image driving mechanism 2 is arranged at the top of the mobile base 51, and the toggle driving mechanism 4 is arranged inside the mobile base 51 and one end of the toggle driving mechanism 4 extends out of the mobile base 51.

[0053] The supporting mechanism 5 further includes two groups of distance measuring sensor 53 units, which are arranged at intervals along the moving direction of the supporting mechanism 5, and each distance measuring sensor 53 unit includes two distance measuring sensors 53, which are arranged on both sides of the moving base 51. When the moving base 51 is moving forward, the four distance measuring sensors 53 are used to measure the distance from the moving base 51 to the inner wall of the air inlet 61. When the four distance measurement values ​​are the same, it means that the moving base 51 is located in the middle of the air inlet 61. When the four measurement values ​​are different, it means that the moving base 51 is deflected, and the control device will make adjustments according to the measurement values ​​to keep the moving base in the middle of the air inlet 61.

[0054] Working process of the first-stage fan blade surface defect detection device of the turbofan aircraft engine:

[0055] The staff puts the detection device into the entrance of the air intake duct 61 of the aircraft engine 6. When the mobile base 51 is moving forward, the four distance sensors 53 are used to measure the distance between the mobile base 51 and the inner wall of the air intake duct 61. When the four distance measurement values ​​are the same, it means that the mobile base 51 is located in the middle of the air intake duct 61. When the four measurement values ​​are different, it means that the mobile base 51 is deflected, and the control device will adjust according to the measurement values ​​to keep the mobile base 51 in the middle of the air intake duct 61.

[0056] The mobile base 51 stops when it moves to the vicinity of the support plate 62 of the aircraft engine 6. When testing is performed, the rotating motor 44 of the toggle drive mechanism 4 drives the toggle assembly 3 to rotate, and the slide 42 in the toggle drive mechanism 4 moves along the slide 42 base 41 to enter the gap between the two support plates 62, and then extends into the interior of the aircraft engine 6. Then, after the toggle assembly 3 passes through the support plate 62, the telescopic rod 432 in the toggle drive mechanism 4 extends out to fine-tune the position, and at the same time, the rotating motor 44 drives the toggle assembly 3 to rotate to a horizontal position. At this time, the two adjacent toggle columns 34 on the track 32 clamp the edge of the blade 631 in the first-stage fan blade 63, providing a torque for the rotation of the blade 631. When the rotating shaft 33 in the toggle assembly 3 rotates, it drives the track 32 to rotate, and then drives the blade 631 clamped by the toggle column 34 to rotate. At this time, the blade counter 35 counts the number of blades 631 that are rotated. Fig.11 The working status of the surface defect detection device of the first-stage fan blade of a turbofan aircraft engine is shown.

[0057] When the moving base 51 stops, the toggle assembly 3 is extended into the aircraft engine 6 and adjusted in position. The lateral moving slide rail 211 of the image driving mechanism 2 adjusts the horizontal position of the image acquisition processing assembly 1, and the rotating bracket 23 of the image driving mechanism 2 adjusts the up and down position of the image acquisition processing assembly 1. The image acquisition processing assembly 1 adjusts the horizontal position and the up and down position together, so that the image acquisition processing assembly 1 can be aligned with the radial middle position of the blade 631. After the position is adjusted, the electric push rod assembly 22 drives the first camera 11 and the second camera 12 to enter the interior of the aircraft engine 6. Each blade 631 needs to be photographed and collected twice. First, the front information of the blade 631 is collected. The first camera 11 extends to the vicinity of the blade 631 and takes a front image once; then, driven by the electric push rod assembly 22, it continues to go deep into the back of the blade 631, and the second camera 12 installed in the opposite direction takes a picture of the back of the blade 631.

[0058] According to the number of blades 631 of the first-stage fan blades of the turbofan aircraft engine, each time the toggle component 3 toggles the fan blade, the blade counter 35 counts one, and the image acquisition and processing component 1 performs an image capture task. When the number counted by the blade counter 35 is consistent with the total number of blades 631, it is determined that the detection task is completed, and the image acquisition and processing component 1 and the toggle component 3 return to the original position of the detection device.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for detecting surface defects of first-stage blades of a turbofan aircraft engine, characterized in that: include; An image acquisition and processing component is used to acquire and process the front and back images of each blade in the first-stage fan blades; An image driving mechanism, used for driving the image acquisition and processing component to move horizontally, lift and retract, so that the image acquisition and processing component can enter the interior of the aircraft engine; A toggle assembly, used for toggle the blades in the first-stage fan blades; A toggle drive mechanism, used to drive the toggle assembly to rotate and telescope so that the toggle assembly can engage with the blade; A bearing mechanism, used for bearing the image driving mechanism and the toggle driving mechanism, and driving the image driving mechanism and the toggle driving mechanism to move; The image acquisition and processing component includes a first camera, a second camera and a processing unit; The first camera is arranged on the image driving mechanism, and the image driving mechanism drives the first camera to move to the front of the blade to collect a front image of the blade; The second camera is arranged on the image driving mechanism through a mounting seat, and the image driving mechanism drives the second camera to pass through the gap between the two blades and move to the rear of the first-stage fan blade to collect the back image of the blade; The first camera and the second camera respectively send the collected front image and back image information to the processing unit; The processing unit acquires and processes the front image and back image information; The toggle assembly includes a support frame, a crawler and a plurality of rotating shafts; The support frame is connected to the toggle drive mechanism, one end of the support frame away from the toggle drive mechanism is open, a plurality of the rotating shafts are arranged in the opening at intervals and the plurality of the rotating shafts are rotatably connected to the support frame; The crawler belt is rollingly connected to the rotating shaft; A plurality of toggle posts are arranged on the crawler at equal intervals.

2. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 1, characterized in that: The image driving mechanism comprises a lateral movement assembly, an electric push rod assembly and a rotating bracket; The lateral movement assembly comprises a lateral movement slide rail connected to the top end of the bearing mechanism and a slider slidably connected to the lateral movement slide rail; The electric push rod assembly includes an electric cylinder and a telescopic push rod connected to each other; The two ends of the rotating bracket are rotatably connected to the slider and the electric cylinder respectively; The image driving mechanism further comprises an angle sensor disposed in the electric cylinder, wherein the angle sensor is used to keep the electric push rod assembly in a horizontal state.

3. The first-stage fan blade surface defect detection device of a turbofan aircraft engine as claimed in claim 2, characterized in that: The first camera is arranged at the front end of the telescopic push rod, and the second camera is arranged on the front end side wall of the telescopic push rod through the mounting seat.

4. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 1, characterized in that: The toggle column is made of elastic material.

5. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 1, characterized in that: The toggle assembly also includes a blade counter; The blade counter is arranged on one side of the support frame to count the number of the blades that are moved.

6. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 1, characterized in that: The toggle drive mechanism includes a slide base arranged inside the bearing mechanism, a slide slidably connected to the slide base, and a telescopic component arranged on the slide; One end of the telescopic component extends out of the bearing mechanism, and the toggle component is rotatably connected to the end of the telescopic component.

7. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 1, characterized in that: The bearing mechanism comprises a mobile base and four rollers arranged on the mobile base; The image driving mechanism is arranged on the top of the mobile base; The toggle drive mechanism is arranged inside the mobile base and one end of the toggle drive mechanism extends out of the mobile base.

8. The first-stage fan blade surface defect detection device of a turbofan aircraft engine according to claim 7, characterized in that: The carrying mechanism further comprises at least two groups of distance measuring sensor units, and the distance measuring sensor units are arranged at intervals along the moving direction of the carrying mechanism; Each of the distance measuring sensor units includes two distance measuring sensors, and the two distance measuring sensors are respectively arranged on two sides of the mobile base.

Images