Visual detection device for misloading and neglected loading of main combustion chamber of aero-engine

Abstract

The utility model discloses a visual detection device for misloading and neglected loading of a main combustion chamber of an aero-engine, and the device comprises a numerical control rotary table which is provided with two vertical column guide rails which are vertically arranged in parallel; a lifting plate and a cross beam are respectively connected between the two stand column guide rails; a vertically-arranged lead screw is connected between the cross beam and the lifting plate and used for driving the lifting plate to ascend and descend through rotation of the lead screw. A worm gear is arranged on one side of the lifting plate, the center of the worm gear is connected with a rotating table, and the rotating table is driven to rotate within a certain angle relative to the central axis of the worm gear through rotation of the worm gear; the rotating table comprises a hollow rotating disc, a roller bearing and a gear which are horizontally arranged and coaxially and fixedly connected in sequence, and the third electric motor is used for driving the gear to rotate and further driving the rotating disc to rotate around the center. The problems of low manual inspection efficiency, large workload and the like in the existing civil aircraft engine main combustion chamber assembling process are solved.

Description

Technical Field

[0001] This utility model belongs to the field of image detection technology, specifically relating to a visual detection device for misinstallation or omission in the main combustion chamber of an aero-engine. Background Technology

[0002] The main combustion chamber of an aero-engine is one of the core components of a civil aero-engine (CAE), and its assembly quality directly affects the engine's operational stability, safety, and related performance parameters. The CAE main combustion chamber has a large number of surface parts, with complex inter-part relationships and a relatively concentrated distribution. The entire assembly process is mostly done manually, requiring strict quality control. Therefore, after the main combustion chamber components are assembled, the assembly status of all surface parts must be inspected to ensure that the assembly quality meets process specifications.

[0003] Currently, the visual inspection of civil aircraft engine assembly quality in my country is mainly carried out manually. Inspectors check the assembly quality of various components on the surface according to assembly process specifications, and combine their personal experience to judge whether there are any mis-assembled or missing parts. Finally, the inspection results are recorded in writing. Because there are numerous external parts in the main combustion chamber of civil aircraft engines, manual inspection is labor-intensive, error-prone, time-consuming, lacks original quality judgment evidence, and makes it difficult to trace the quality status. In recent years, machine vision technology has developed rapidly, gradually replacing manual inspection of products due to its advantages of high detection efficiency and strong traceability. Utility Model Content

[0004] The purpose of this invention is to provide a visual inspection device for mis-installation or omission of the main combustion chamber of aero-engines, so as to solve the problems of low efficiency and large workload of manual inspection in the assembly process of the main combustion chamber of existing civil aero-engines.

[0005] The present invention adopts the following technical solution: a visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine, comprising a CNC turntable having two vertically arranged parallel column guide rails; a lifting plate is connected between the two column guide rails near the bottom and a crossbeam is fixedly connected near the top; a vertically arranged lead screw is connected between the crossbeam and the lifting plate, for driving the lifting plate to rise and fall through the rotation of the lead screw; a first electric motor is connected to one end of the lead screw located on the crossbeam.

[0006] A worm gear is installed on one side of the lifting plate. The central axis of the worm gear is perpendicular to the lifting plate. A rotary table is connected to the center of the worm gear. The rotation of the worm gear drives the rotary table to rotate within a certain angle about the central axis of the worm gear. The worm gear is connected to the output shaft of the second electric motor through a worm.

[0007] The rotary table includes a hollow turntable, roller bearings and gears that are horizontally arranged and coaxially fixed in sequence. The gears mesh with the end of a vertically arranged rotating shaft. The rotating shaft is connected to a third electric motor through a worm gear transmission mechanism. The third electric motor is used to drive the gear to rotate, thereby driving the turntable to rotate around the center.

[0008] Furthermore, it also includes a special tooling, which is a ring structure with a U-shaped cross-section that opens outwards. Its inner and outer diameters correspond to the inner and outer diameters of the turntable. It is coaxially mounted above the turntable. The upper part of the special tooling is used to coaxially mount the main combustion chamber of the civil aero-engine to be tested.

[0009] Furthermore, it also includes a turntable controller, which is cantilevered to the crossbeam.

[0010] Furthermore, it also includes an image acquisition device, which is mounted on a vertically positioned first support base via a robotic arm; the robotic arm is a six-axis industrial robot with six degrees of freedom, and the workspace is the area within the effective reach of the robotic arm. The image acquisition device is used to capture external images of the main combustion chamber of a civil aero-engine.

[0011] Furthermore, it also includes an integrated control cabinet to house the control boxes for all modules of the vision inspection device, as well as its electrical and electronic equipment.

[0012] The features and beneficial effects of this utility model are as follows:

[0013] This utility model is equipped with a special tooling to mark the initial installation angle of the main combustion chamber of a civil aircraft engine, and it is easy for the camera to capture images from an upward angle, which is beneficial to the rapid installation and image acquisition of the main combustion chamber of the aircraft engine, and the acquired external image information is more comprehensive.

[0014] This invention features a CNC turntable that can rotate, move up and down, and deflect the main combustion chamber of a civil aero-engine. Combined with a robotic arm, it can capture multiple images of different parts in the same posture, shortening inspection time and facilitating the installation and removal of the main combustion chamber. The image acquisition device is equipped with multiple cameras, enabling image acquisition from different angles of the same part. Multiple strip light sources provide illumination for the monocular industrial camera. This invention, a visual inspection device for misinstallation or omission of the main combustion chamber of an aero-engine, integrates both hardware and software functions into a single control cabinet, making the equipment easier to operate and move. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine according to the present invention.

[0016] Figure 2This is a schematic diagram of the overall structure of a CNC turntable for a visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine, according to the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure of a CNC turntable for a visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine, according to the present invention.

[0018] Figure 4 This is a schematic diagram of a special tooling structure for a visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine, according to the present invention.

[0019] Among them, 1. Integrated control cabinet, 2. First support base, 3. Robotic arm, 4. Image acquisition device, 5. CNC turntable, 6. Special tooling, 7. Civil aero-engine main combustion chamber, 8. Lead screw, 9. Cooling fan, 10. Guide rail, 11. Column guide rail, 12. Lifting plate, 13. Turntable controller, 14. Display cantilever, 15. Second support base, 16. First electric motor, 17. Third electric motor, 18. Turntable, 19. Second electric motor, 20. Worm gear, 21. Positioning pin, 22. Top surface, 23. Bottom surface, 24. Crossbeam, 25. Roller bearing, 26. Gear. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] This utility model provides a visual detection device for misinstallation or omission in the main combustion chamber of an aero-engine, such as... Figure 2 and Figure 3 As shown, the system includes a CNC rotary table 5 with two vertically arranged parallel column guide rails 11. A lifting plate 12 is connected between the two column guide rails 11 near the bottom, and a crossbeam 24 is fixed near the top. A second support base 15 is provided at the bottom of the two column guide rails 11 to ensure stability. A vertically arranged lead screw 8 is connected between the crossbeam 24 and the lifting plate 12, used to drive the lifting plate 12 to rise and fall through the rotation of the lead screw 8. A first electric motor 16 is connected to one end of the lead screw 8 located on the crossbeam 24.

[0022] The lifting plate 12 moves up and down guided by two column guide rails 11. An enclosed housing is located outside the column guide rails 11, and multiple cooling fans 9 are installed on the housing to assist in cooling the Siemens control system inside. A guide rail 10 is coaxially mounted in the middle section of the lead screw 8, supporting and guiding the lead screw 8 to ensure that the lead screw can move vertically.

[0023] A worm gear 20 is provided on one side of the lifting plate 12. The central axis of the worm gear 20 is perpendicular to the lifting plate 12. A rotary table is connected to the center of the worm gear 20. The rotation of the worm gear 20 drives the rotary table to rotate within a certain angle about the central axis of the worm gear 20. The worm gear 20 is connected to the output shaft of the second electric motor 19 through a worm.

[0024] The rotary table includes a hollow turntable 18, roller bearings 25, and gear 26, which are horizontally arranged and coaxially fixed together. The central axis of the hollow turntable 18 is in the same direction as the lifting plate 12. The gear 26 meshes with the end of a vertically arranged rotating shaft. The rotating shaft is connected to a third electric motor 17 through a worm gear transmission mechanism. The third electric motor 17 drives the gear 26 to rotate, thereby causing the turntable 18 to rotate around its center. A worm gear is coaxially mounted on the rotating shaft, meshing with a worm. The worm is coaxially connected to the output shaft of the third electric motor 17.

[0025] In operation, the first electric motor 16 drives the lifting plate 12 and the rotary table to move up and down together via the lead screw 16, with a typical range of movement from 20cm to 150cm above the ground. If necessary, the second electric motor 19 can be controlled by the rotary table controller 13 to drive the worm gear 20 to rotate clockwise and counterclockwise around its center, thereby causing the rotary table to rotate at a certain angle about the center of the worm gear, with a deflection angle range of -90° to 90°. The third electric motor 17 drives the rotary table to rotate clockwise and counterclockwise via a worm gear mechanism, with a unidirectional rotation angle greater than 360°, preferably ±380° to 720°. The CNC rotary table 5 uses a Siemens control system and has two degrees of freedom: rotation of the turntable 18 and vertical lifting.

[0026] In some embodiments, such as Figure 4 As shown, it also includes a special tooling 6, which is a ring structure with a U-shaped cross-section with the opening facing outward. Its inner and outer diameters correspond to the inner and outer diameters of the turntable 18. It is coaxially mounted above the turntable 18. The upper part of the special tooling 6 is used to coaxially mount the civil aero-engine main combustion chamber 7 to be tested.

[0027] The dedicated fixture 6 is suitable for various models of civil aero-engine main combustion chambers 7. Multiple bolt holes are arranged around the bottom surface 23 of the dedicated fixture 6, allowing it to be mounted onto the turntable 18 using bolts. Similarly, multiple bolt holes are also arranged around the top surface 22 of the dedicated fixture 6, allowing the civil aero-engine main combustion chamber 7 to be mounted onto the dedicated fixture 6 using bolts. It is recommended to use 10 bolts. The holes on the dedicated fixture 6 match the civil aero-engine main combustion chamber 7 to be inspected. The dedicated fixture 6 allows for a certain height difference between the civil aero-engine main combustion chamber 7 to be inspected and the turntable 18, facilitating image acquisition from a low angle. Two locating pins 21 are provided on the top surface 22 of the dedicated fixture 6. These two locating pins 21 are aligned with the center of the top surface 22, and their positions correspond to the bolt holes on the bottom surface of the civil aero-engine main combustion chamber 7.

[0028] In some embodiments, such as Figure 2 As shown, it also includes a turntable controller 13, which is connected to the crossbeam 24 via a cantilever 14. The display cantilever 14 can move radially and retractably with the turntable controller 13 and rotate 360° about the connecting axis;

[0029] In some embodiments, such as Figure 1 As shown, it also includes an image acquisition device 4, which is mounted on a vertically positioned first support base 2 via a robotic arm 3. The robotic arm 3 is a six-axis industrial robot with six degrees of freedom, and its workspace is the area within the effective reach of the robotic arm 3. The image acquisition device 4 is used to capture external images of the main combustion chamber 7 of a civil aero-engine. The image acquisition device 4 is equipped with multiple cameras, enabling image acquisition from different angles of the same location, and multiple strip light sources are provided to illuminate the monocular industrial camera.

[0030] In some embodiments, such as Figure 1 As shown, it also includes an integrated control cabinet 1, which houses the control boxes for all modules of the vision inspection device and its electrical and electronic equipment.

[0031] The integrated control cabinet houses a host computer, robot controller, light source controller, integrated communication control equipment, power controller, and sockets. Externally, it is equipped with a monitor, keyboard, mouse, and other input / output devices. Switches include a main power switch, a host computer switch, and an emergency stop button. The front and rear cabinet doors can be manually opened, and a robot teach pendant is located on the side. The host computer in the integrated control cabinet is a computer with built-in testing software, and it connects to the robot, camera, and turntable via network cables that comply with the TCP / IP protocol.

[0032] The external image detection process of the visual detection device for misinstallation or omission in the main combustion chamber of an aero-engine, as described in this utility model, is as follows:

[0033] Step 1: When installing the main combustion chamber 7 of a civil aircraft engine, the main combustion chamber 7 and the special tooling 6 are detachably connected. According to the initial zero-position requirements of the main combustion chamber 7, the angular position of the main combustion chamber 7 relative to the special tooling 6 can be adjusted.

[0034] Step 2: The host computer sends a movement command to the turntable controller 13. The turntable 18 carries the special tooling 6 and the civil aero-engine main combustion chamber 7. The turntable 18 and the civil aero-engine main combustion chamber 7 are moved together in the vertical direction to a suitable height and enter the testing station.

[0035] Step 3: The host computer sends control commands to the robotic arm 3, turntable 18, and image acquisition device 4. Following the pre-set acquisition points on the robotic arm and the turntable angle, external images of the main combustion chamber 7 of the civil aero-engine are acquired one by one. The host computer controls the turntable 18 to rotate to the set angle, the robotic arm 3 reaches the set acquisition point, and the corresponding light source of the image acquisition device 4 is turned on at the set brightness, allowing the camera to acquire images. The acquired data is returned to the detection software in the host computer for analysis and to generate a judgment result. Then, the lights are turned off. Subsequently, the host computer sends control commands to the robotic arm 3 and turntable 18, causing them to move to the next image acquisition point and repeating the above sequence of light source on / off, image acquisition, data transmission, analysis, and judgment until the acquisition of external images of all fuel nozzles, caps, plugs, etc., of the main combustion chamber 7 of the aero-engine and the analysis and judgment of their assembly correctness are completed.

[0036] Step 4: Once the testing process is complete, the turntable 18 is rotated to the zero position of 0° by the third electric motor 17 and lowered to a low position above the ground. The fixing bolts and nuts are loosened, and the civil aero-engine main combustion chamber 7 is hoisted and removed, completing the process of acquiring external images of the civil aero-engine main combustion chamber 7 and determining the correctness of its assembly.

[0037] This invention features a CNC turntable that can rotate, move up and down, and deflect the main combustion chamber of a civil aero-engine. This, combined with a robotic arm, allows for the acquisition of multiple images of different locations from the same position, shortening inspection time and facilitating the installation and removal of the main combustion chamber. The image acquisition device is equipped with multiple cameras, enabling image acquisition from different angles of the same location. Multiple strip light sources provide illumination for the monocular industrial camera. This invention also utilizes specialized tooling for installing the main combustion chamber, facilitating adjustment of the initial installation angle and enabling the camera to acquire images from a low angle. This promotes rapid installation and image acquisition of the main combustion chamber for civil aero-engines, resulting in more comprehensive external image information.

[0038] This utility model discloses a visual inspection device for misassembly and omissions in the main combustion chamber of aero-engines. It integrates both hardware and software functions into a single control cabinet, making operation and relocation of the equipment more convenient. This device meets the inspection requirements of the main combustion chamber of aero-engines, offering high inspection efficiency and significantly reducing the limitations of traditional manual inspection, which is time-consuming and inefficient. It effectively improves the inspection quality and efficiency of the main combustion chamber assembly. Manual inspection of the main combustion chamber takes approximately 20 minutes, while the visual inspection device takes approximately 8 minutes, increasing efficiency by 60% and significantly improving accuracy.

Claims

1. A visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine, characterized in that, The system includes a CNC rotary table (5) with two vertically arranged parallel column guide rails (11); a lifting plate (12) is connected between the two column guide rails (11) near the bottom and a crossbeam (24) is fixed near the top; a vertically arranged lead screw (8) is connected between the crossbeam (24) and the lifting plate (12) for driving the lifting plate (12) to rise and fall by rotating the lead screw (8); a first electric motor (16) is connected to one end of the lead screw (8) located on the crossbeam (24); A worm gear (20) is provided on one side of the lifting plate (12). The central axis of the worm gear (20) is perpendicular to the lifting plate (12). A rotary table is connected to the center of the worm gear (20) for rotating the rotary table about the central axis of the worm gear (20) within a certain angle by rotating the worm gear (20). The worm gear (20) is connected to the output shaft of the second electric motor (19) through a worm. The rotary table includes a hollow turntable (18) arranged horizontally and coaxially fixed in sequence, a roller bearing (25) and a gear (26). The gear (26) meshes with the end of a vertically arranged rotating shaft. The rotating shaft is connected to a third electric motor (17) through a worm gear transmission mechanism. The third electric motor (17) is used to drive the gear (26) to rotate, thereby driving the turntable (18) to rotate around the center.

2. The visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine as described in claim 1, characterized in that, It also includes a special tool (6), which is a ring structure with a cross-section that is U-shaped with the opening facing outwards. Its inner and outer diameters are the same as the inner and outer diameters of the turntable (18). It is coaxially mounted above the turntable (18); the special tooling (6) is used to coaxially mount the civil aero-engine main combustion chamber (7) to be tested above it.

3. A visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine as described in claim 1 or 2, characterized in that, It also includes a turntable controller (13), which is connected to the crossbeam (24) via a cantilever (14).

4. The visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine as described in claim 3, characterized in that, It also includes an image acquisition device (4), which is mounted on a vertically set first support base (2) via a robotic arm (3); the robotic arm (3) is a six-axis industrial robot with six degrees of freedom, and the working space is the area within the effective arm span of the robotic arm (3); the image acquisition device (4) is used to capture external images of the main combustion chamber (7) of the civil aero-engine.

5. The visual inspection device for misinstallation or omission in the main combustion chamber of an aero-engine as described in claim 4, characterized in that, It also includes an integrated control cabinet (1) for housing the control box of all modules of the vision inspection device and its electrical and electronic equipment.

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