CN111721810B - Turbine blade defect infrared detection system integrated with constant temperature heating box - Google Patents
Turbine blade defect infrared detection system integrated with constant temperature heating box Download PDFInfo
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- CN111721810B CN111721810B CN202010657166.6A CN202010657166A CN111721810B CN 111721810 B CN111721810 B CN 111721810B CN 202010657166 A CN202010657166 A CN 202010657166A CN 111721810 B CN111721810 B CN 111721810B
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Abstract
An infrared detection system for defects of turbine blades fused with a constant temperature heating box. The device comprises a chassis, a bearing universal wheel, a constant temperature heating box electric sliding block, a constant temperature heating box sliding rail, an air compressor pipeline, a stepping motor, a bottom guide rail, a vertical guide rail, an electric precise rotating table fixing support, a rotating platform, a temperature sensor, a temperature controller, a turbine blade clamping device, an infrared thermal imager mounting bracket, an electric guide rail sliding block, an electric control cabinet and a digital temperature sensor; according to the invention, the thermal excitation is uniformly applied to the turbine blade body in the constant-temperature heating box, so that the turbine blade is ensured to be heated uniformly, and the heating efficiency of the turbine blade can be greatly improved; the detection efficiency and the automation degree in the manufacturing and maintenance process are improved, and the influence of uncertain factors such as human beings, experience and the like on the detection result is reduced; and tracking, analyzing and evaluating safety according to the data obtained by detection.
Description
Technical Field
The invention belongs to the technical field of maintenance and detection of civil aircraft, and particularly relates to an infrared detection system for defects of turbine blades fused with a constant-temperature heating box.
Background
With the continuous development of aviation technology, the speed of updating civil aircraft is increased. The aeroengine can provide power for the aircraft, is known as a 'bright bead on a modern industrial crown', and the number of turbine blades in the aeroengine is the largest, so the turbine blades are important power elements of the aeroengine. In the high-speed running state of the aero-engine, the service environment of the turbine blade is very bad, besides high-strength thermal shock, high-speed impact, airflow exciting force, alternating stress and other complex loads are born at extremely high temperature, so that the turbine blade can be subjected to the actions of hot corrosion, high-temperature oxidation, abrasion and the like, the defects of fine cracks, stress concentration, corrosion fatigue and the like are easy to generate, meanwhile, due to the complex curved structure and complicated manufacturing process of the turbine blade, diagnosis and monitoring are difficult to carry out through routine inspection, the aero-engine is caused to be failed when the potential hazard is serious, so that the flight safety is endangered, the turbine blade is detected at high efficiency, and the method has important significance in improving the manufacturing quality and the production efficiency of the turbine blade.
At present, the research on the rapid detection method of the complex curved turbine blade is less, and the existing detection method is only aimed at a certain specific application field, so that the problems of large workload of a detector, low detection efficiency, main dependence on subjective judgment of the detector and other artificial factors exist, false detection and omission are easy to cause, and the detection confidence is reduced. It is obvious that the efficient detection method of the turbine blade is particularly important for improving the manufacturing and maintenance of the turbine blade, and the efficient detection system of the turbine blade damage at the present stage still belongs to the blank, so that efficient detection by adopting an effective method is needed. The infrared thermal imaging nondestructive testing technology is used as a novel nondestructive testing method, and the process is that an infrared thermal imager with good use performance is used for collecting infrared detail characteristic images after thermal excitation, and then detection analysis is carried out, so that the health state and the internal integrity degree of the turbine blade can be monitored efficiently and rapidly.
The thermal excitation loading of the infrared detection of the turbine blade is realized by external heat radiation or heat conduction. Due to the material, coating and structural characteristics of the turbine blade, the problem of uneven heat distribution on the near surface of the turbine blade can be caused, so that the characteristic image acquisition, analysis and evaluation of the turbine blade by the infrared thermal imaging system can be directly influenced, and finally the detection efficiency and quality of the turbine blade are reduced. Therefore, by developing a turbine blade defect infrared detection system fused with the constant temperature heating box, a uniform temperature field is established by adopting the constant temperature heating box to thermally excite the turbine blade, and the uniform heating and heating efficiency of the turbine blade can be greatly improved; the detection efficiency and the automation degree in the manufacturing and maintenance process are improved, and the influence of uncertain factors such as human beings, experience and the like on the detection result is reduced; and tracking, analyzing and safety evaluating are carried out according to the data obtained by detection, so that the navigability of the aeroengine is improved and the safe operation of the engine is ensured. But such devices are currently lacking.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an infrared detection system for defects of turbine blades fused with a constant temperature heating box.
In order to achieve the aim, the turbine blade defect infrared detection system of the fusion constant temperature heating box comprises a chassis, a bearing universal wheel, a constant temperature heating box electric sliding block, a constant temperature heating box sliding rail, an air compressor pipeline, a stepping motor, a bottom guide rail, a vertical guide rail, an electric precise rotating table fixing support, a rotating platform, a temperature sensor, a temperature controller, a turbine blade clamping device, an infrared thermal imager mounting bracket, an electric guide rail sliding block, an electric control cabinet and a digital temperature sensor; wherein the chassis is horizontally arranged, and four corners of the bottom surface are respectively provided with a bearing universal wheel; the two constant temperature heating box sliding rails are arranged in the middle of the left side surface of the chassis in a parallel mode, and each constant temperature heating box sliding rail is provided with at least one constant temperature heating box electric sliding block; the bottom surface of the constant temperature heating box is fixed on the electric sliding block of the constant temperature heating box, electric heating elements are respectively arranged on the front side and the rear side of the inside, a temperature sensor is respectively arranged at four corners of the inner surface of the left side plate, and the right side surface is an electric baffle door capable of moving up and down; the air compressor is arranged on the top surface of the constant temperature heating box and is communicated with the inside of the constant temperature heating box through an air compressor pipeline; the temperature controller is arranged on the air compressor pipeline; the rotating platform is fixedly arranged at the center part of the surface of the chassis, and a rotating central shaft on the rotating platform is upwards arranged; an output shaft of the stepping motor is connected with an input end of the rotating platform to form an electric rotating platform; the electric precise rotary table fixing support is arranged on a rotary central shaft of the rotary platform and can rotate around the rotary central shaft; the lower end of the electric precise rotary table is fixed on the surface of the electric precise rotary table fixing support, and the upper part of the electric precise rotary table is provided with a blade clamping plate; the turbine blade clamping device is arranged on any blade clamping plate and realizes 360-degree rotation around the axis through the electric precise rotating table; the bottom guide rail is arranged in the middle of the right side surface of the chassis along the left-right direction, and the upper part of the bottom guide rail is provided with a bottom electric sliding block; the lower end of the vertical guide rail is fixed on the bottom electric slide block, and the left side surface is provided with the electric guide rail slide block; the thermal infrared imager mounting bracket is fixed on the left side surface of the electric guide rail slide block in a mode of being capable of moving back and forth; the thermal infrared imager is fixed on the left side surface of the thermal infrared imager mounting bracket; the digital temperature sensor is arranged on the electric guide rail slide block and positioned at the outer side of the thermal infrared imager mounting bracket; the electrical control cabinet is arranged at the edge part of the surface of the chassis and is electrically connected with the constant temperature heating box, the temperature controller, the air compressor, the temperature sensor, the digital temperature sensor, the stepping motor, the electric precise rotating platform, the bottom electric sliding block, the electric guide rail sliding block, the electric baffle door and the constant temperature heating box electric sliding block respectively.
The constant temperature heating cabinet be cuboid structure, the front and back side is two sheet metal apron 29 that can dismantle, is convenient for electric heating element's maintenance and change.
The thermal infrared imager adopts a German Infratec VarioCAM head680 thermal imager.
The electric control cabinet is provided with an industrial touch screen, an electric control cabinet door lock, a power button and an emergency stop button.
The industrial touch screen adopts SIEMENS6AV6648-0CE11-3AX0 industrial touch screen.
According to the infrared detection system for the defects of the turbine blades fused with the constant-temperature heating box, which is provided by the invention, the thermal excitation is uniformly applied to the turbine blade body in the constant-temperature heating box, so that the turbine blades are uniformly heated, and the heating efficiency of the turbine blades can be greatly improved; the detection efficiency and the automation degree in the manufacturing and maintenance process are improved, and the influence of uncertain factors such as human beings, experience and the like on the detection result is reduced; and tracking, analyzing and safety evaluating are carried out according to the data obtained by detection, so that the navigability of the aeroengine can be improved and the safe operation of the engine can be ensured.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a structural perspective view of a turbine blade defect infrared detection system of a fused constant temperature heating box.
Fig. 2 is a perspective view of a structure of the infrared detection system for the defects of the turbine blade of the fused constant temperature heating box, which is provided by the invention when the infrared detection system is observed from the back side.
Fig. 3 is a structural perspective view of a turbine blade defect infrared detection system of the fused constant temperature heating box provided by the invention, wherein a sheet metal cover plate is arranged.
Fig. 4 is a perspective view of a structure of a constant temperature heating box in the infrared detection system for the defects of the turbine blades fused with the constant temperature heating box.
Fig. 5 is a perspective view of the air compressor and the temperature controller in the infrared detection system for the defects of the turbine blades fused with the constant temperature heating box.
Fig. 6 is a structural perspective view of a rotating platform and an electric precise rotating platform device in the infrared detection system for the defects of the turbine blades of the fused constant temperature heating box.
Fig. 7 is a structural perspective view of a turbine blade clamping device in the infrared detection system for the defects of the turbine blades fused with the constant temperature heating box.
Fig. 8 is a structural perspective view of a thermal imager acquisition device in the infrared detection system for the defects of the turbine blades of the fused constant temperature heating box.
Detailed Description
The following describes the structure of the infrared detection system for the defects of the turbine blade of the fused constant temperature heating box according to the attached drawings and the specific embodiments.
As shown in fig. 1-8, the turbine blade defect infrared detection system integrated with the constant temperature heating box provided by the invention comprises a chassis 11, a bearing universal wheel 10, a constant temperature heating box 13, a constant temperature heating box electric sliding block 12, a constant temperature heating box sliding rail 26, an air compressor 15, an air compressor pipeline 16, a stepping motor 27, a bottom guide rail 6, a vertical guide rail 22, an electric precise rotating table 8, an electric precise rotating table fixing support 24, a rotating platform 7, a temperature sensor 25, a temperature controller 14, a turbine blade clamping device 9, an infrared thermal imager 21, an infrared thermal imager mounting bracket 23, an electric guide rail sliding block 20, an electric control cabinet 5 and a digital temperature sensor 30; wherein the chassis 11 is horizontally arranged, and four corners of the bottom surface are respectively provided with a bearing universal wheel 10; the two constant temperature heating box sliding rails 26 are arranged in the middle of the left side surface of the chassis 11 in a parallel mode, and each constant temperature heating box sliding rail 26 is provided with at least one constant temperature heating box electric sliding block 12; the bottom surface of the constant temperature heating box 13 is fixed on the electric sliding block 12 of the constant temperature heating box, electric heating elements 18 are respectively arranged on the front side and the rear side of the inside, a temperature sensor 25 is respectively arranged at four corners of the inner surface of the left side plate, and an electric baffle door 17 which can move up and down is arranged on the right side surface; an air compressor 15 is installed on the top surface of the constant temperature heating box 13 and is communicated with the inside of the constant temperature heating box 13 through an air compressor pipe 16; the temperature controller 14 is mounted on the air compressor conduit 16; the rotating platform 7 is fixedly arranged at the center part of the surface of the chassis 11, and a rotating central shaft on the rotating platform is upwards arranged; an output shaft of the stepping motor 27 is connected with an input end of the rotating platform 7 to form an electric rotating platform; the electric precise rotary table fixing support 24 is mounted on a rotary central shaft of the rotary platform 7 and can rotate around the rotary central shaft; the lower end of the electric precise rotary table 8 is fixed on the surface of the electric precise rotary table fixing support 24, and a blade clamping plate is arranged at the upper part; the turbine blade clamping device 9 is arranged on any blade clamping plate, and realizes 360-degree rotation around the axis through the electric precise rotating table 8; the bottom guide rail 6 is arranged in the middle of the right side surface of the chassis 11 along the left-right direction, and a bottom electric sliding block is arranged at the upper part; the lower end of the vertical guide rail 22 is fixed on the bottom electric slide block, and the left side surface is provided with the electric guide rail slide block 20; the thermal infrared imager mounting bracket 23 is fixed on the left side surface of the electric guide rail slide block 20 in a manner of being capable of moving back and forth; the thermal infrared imager 21 is fixed on the left side surface of the thermal infrared imager mounting bracket 23; the digital temperature sensor 30 is arranged on the electric guide rail slide block 20 and positioned at the outer side part of the thermal infrared imager mounting bracket 23; the electrical control cabinet 5 is installed at the surface edge part of the chassis 11, and is electrically connected with the constant temperature heating box 13, the temperature controller 14, the air compressor 15, the temperature sensor 25, the digital temperature sensor 30, the stepping motor 27, the electric precision rotation platform 8, the bottom electric slide block, the electric guide rail slide block 20, the electric baffle door 17 and the constant temperature heating box electric slide block 12, respectively.
The constant temperature heating cabinet 13 is of a cuboid structure, and the front side surface and the rear side surface are provided with two detachable sheet metal cover plates 29, so that the electric heating element 18 can be maintained and replaced conveniently.
The thermal infrared imager 21 adopts a German Infratec VarioCAM head680 thermal imager.
The electric control cabinet 5 is provided with an industrial touch screen 1, an electric control cabinet door lock 4, a power button 2 and an emergency stop button 3.
The industrial touch screen 1 adopts a SIEMENS6AV6648-0CE11-3AX0 industrial touch screen.
The application method of the turbine blade defect infrared detection system fused with the constant temperature heating box provided by the invention is explained as follows:
(1) The appearance and the state of the detection system are checked manually, the power button 2 is pressed, the whole system is electrified and self-checked, and if the industrial touch screen 1 does not display any abnormal prompt, the detection system can be used normally.
(2) The lower ends of the turbine blades 19 are fixed on the electric precise rotary table 8 by an operator through the turbine blade clamping device 9;
(3) After the turbine blade 19 is installed, the operator is prohibited from entering the vicinity of the detection area of the turbine blade 19.
(4) An operator operates the industrial touch screen 1 on the electrical control cabinet 5 to enable the bottom electric sliding blocks on the bottom guide rail 6 to slowly move left and right, and the electric guide rail sliding blocks 20 on the vertical guide rail 22 to slowly move up and down, so that the thermal infrared imager 21 moves to an optimal observation position of a region to be detected of the turbine blade 19, and the thermal infrared imager 21 is started, so that image characteristic information of the turbine blade 19 under visible light is obtained.
(5) The operator controls the electric baffle door 17 on the constant temperature heating box 13 to slowly lift upwards by operating the industrial touch screen 1, then controls the electric sliding block 12 of the constant temperature heating box and the constant temperature heating box 13 to move rightwards along the sliding rail 26 of the constant temperature heating box until the rotating platform 7 and parts and turbine blades 19 on the rotating platform enter the inside of the constant temperature heating box 13, slowly closes the electric baffle door 17 downwards, controls the electric heating element 18 to rapidly heat, and simultaneously monitors the temperature value inside the constant temperature heating box 13 in real time through the temperature sensor 25. If the heat distribution inside the constant temperature heating box 13 is uneven, the air compressor 15 is started, the temperature controller 14 is adjusted, compressed air with proper temperature enters the inside of the constant temperature heating box 13 through the air compressor pipeline 16, the constant temperature heating box 13 is filled with heat in a short time to reach an ideal state, in the process, the industrial touch screen 1 is utilized to control the rotation of the stepping motor 27, the rotation angle of the turbine blade 19 is adjusted, the turbine blade 19 is ensured to have proper angle and be heated uniformly in the heating process, and convenience is provided for the later detection process.
(6) An operator controls the digital temperature sensor 30 to display the temperature in the room temperature environment in real time by operating the industrial touch screen 1, and observes the temperature change when the electric baffle door 17 of the constant temperature heating box is opened after the heating of the constant temperature heating box 13 is completed, so that the temperature sensor can be used as temperature compensation.
(6) Starting to test, an operator operates the industrial touch screen 1, sets a certain temperature in the constant temperature heating box 13, such as 60 ℃, 80 ℃ or other different temperatures, starts the heating element 18 in the constant temperature heating box 13 to heat, monitors temperature values fed back in real time by the four temperature sensors 25 in the constant temperature heating box 13, and stops heating when the detected temperature reaches the set temperature; if the temperature values fed back by the four temperature sensors 25 in real time are monitored to be different and the set temperature is not reached, the air compressor 15 and the temperature controller 14 are started so that the temperature in the constant temperature heating box 13 is uniform.
(7) The electric baffle door 17 of the constant temperature heating box is opened, the constant temperature heating box 13 is moved to the left to the initial position, an operator operates the industrial touch screen 1 after 3 minutes, the electric sliding blocks at the bottom on the bottom guide rail 6 are controlled to slowly move left and right, the electric sliding blocks 20 on the vertical guide rail 22 slowly move up and down, the thermal infrared imager 21 is adjusted to enable the position of the image of the turbine blade 19 to be clearly collected, and the infrared and visible light images of the turbine blade 19 are recorded through the thermal infrared imager 21.
(8) The other temperature in the constant temperature heating box 13 is set on the industrial touch screen 1 again, and the steps (6) - (7) are repeated. And sufficient and reliable visible light and infrared images are collected, so that further analysis and evaluation can be conveniently carried out.
(9) After the monitoring operation is completed, the thermal infrared imager 21, the air compressor 15, the temperature controller 14 and the two electric heating elements 18 are turned off, the power button 2 is turned off finally, whether the system is powered off is checked, and an operator wears the heat-insulating glove to take off the tested turbine blade 19 and places the turbine blade in a specified position for storage. If an emergency situation occurs during the detection of the turbine blade 19, the scram button 3 is pressed in time.
It should be emphasized that the embodiments described in this patent are illustrative rather than limiting, and thus the patent is not limited to the embodiments described in this detailed description. Various modifications or substitutions may be made thereto without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features of the embodiments may be combined with each other or other embodiments derived by those skilled in the art from the technical solutions of the present patent and other similar principles, and also belong to the scope of the present patent protection.
Claims (5)
1. A turbine blade defect infrared detection system of fusion constant temperature heating cabinet, its characterized in that: the turbine blade defect infrared detection system integrated with the constant temperature heating box comprises a chassis (11), a bearing universal wheel (10), a constant temperature heating box (13), a constant temperature heating box electric sliding block (12), a constant temperature heating box sliding rail (26), an air compressor (15), an air compressor pipeline (16), a stepping motor (27), a bottom guide rail (6), a vertical guide rail (22), an electric precise rotating table (8), an electric precise rotating table fixing support (24), a rotating platform (7), a temperature sensor (25), a temperature controller (14), a turbine blade clamping device (9), a thermal infrared imager (21), a thermal infrared imager mounting bracket (23), an electric guide rail sliding block (20), an electrical control cabinet (5) and a digital temperature sensor (30); wherein the chassis (11) is horizontally arranged, and four corners of the bottom surface are respectively provided with a bearing universal wheel (10); the two constant temperature heating box sliding rails (26) are arranged in the middle of the left side surface of the chassis (11) in a parallel mode, and each constant temperature heating box sliding rail (26) is provided with at least one constant temperature heating box electric sliding block (12); the bottom surface of the constant temperature heating box (13) is fixed on the electric sliding block (12) of the constant temperature heating box, electric heating elements (18) are respectively arranged on the front side and the rear side of the inside, a temperature sensor (25) is respectively arranged at four corners of the inner surface of the left side plate, and the right side surface is an electric baffle door (17) capable of moving up and down; the air compressor (15) is arranged on the top surface of the constant temperature heating box (13) and is communicated with the inside of the constant temperature heating box (13) through an air compressor pipeline (16); the temperature controller (14) is arranged on the air compressor pipeline (16); the rotating platform (7) is fixedly arranged at the center part of the surface of the chassis (11), and a rotating center shaft on the rotating platform is upwards arranged; an output shaft of the stepping motor (27) is connected with an input end of the rotating platform (7) to form an electric rotating platform; the electric precise rotary table fixing support (24) is arranged on a rotary central shaft of the rotary platform (7) and can rotate around the rotary central shaft; the lower end of the electric precise rotary table (8) is fixed on the surface of the electric precise rotary table fixing support (24), and a blade clamping plate is arranged at the upper part of the electric precise rotary table fixing support; the turbine blade clamping device (9) is arranged on any blade clamping plate, and the rotation of 360 degrees around the axis is realized through the electric precise rotating table (8); the bottom guide rail (6) is arranged in the middle of the right side surface of the chassis (11) along the left-right direction, and the upper part is provided with a bottom electric sliding block; the lower end of the vertical guide rail (22) is fixed on the bottom electric slide block, and the left side surface is provided with the electric guide rail slide block (20); the thermal infrared imager mounting bracket (23) is fixed on the left side surface of the electric guide rail slide block (20) in a mode of being capable of moving back and forth; the thermal infrared imager (21) is fixed on the left side surface of the thermal infrared imager mounting bracket (23); the digital temperature sensor (30) is arranged on the electric guide rail sliding block (20) and positioned at the outer side of the thermal infrared imager mounting bracket (23); the electric control cabinet (5) is arranged at the edge part of the surface of the chassis (11) and is respectively and electrically connected with the constant temperature heating box (13), the temperature controller (14), the air compressor (15), the temperature sensor (25), the digital temperature sensor (30), the stepping motor (27), the electric precision rotating table (8), the bottom electric sliding block, the electric guide rail sliding block (20), the electric baffle door (17) and the constant temperature heating box electric sliding block (12);
the four temperature sensors (25) can feed back whether the temperature in the temperature constant-temperature heating box (13) reaches a set value or not and whether the temperature distribution is uniformly distributed or not in real time; if the heat distribution in the constant temperature heating box (13) is uneven, the air compressor (15) is started, and compressed air with proper temperature enters the constant temperature heating box (13) through the air compressor pipeline (16), so that the heat distribution in the constant temperature heating box (13) is even.
2. The infrared detection system for defects of turbine blades fused to a constant temperature heating cabinet according to claim 1, wherein: the constant temperature heating box (13) is of a cuboid structure, and the front side surface and the rear side surface are provided with two detachable sheet metal cover plates (29), so that the electric heating element (18) can be maintained and replaced conveniently.
3. The infrared detection system for defects of turbine blades fused to a constant temperature heating cabinet according to claim 1, wherein: the thermal infrared imager (21) adopts a German thermal infrared imager InfratecVarioCAMhead 680.
4. The infrared detection system for defects of turbine blades fused to a constant temperature heating cabinet according to claim 1, wherein: the electric control cabinet (5) is provided with an industrial touch screen (1), an electric control cabinet door lock (4), a power button (2) and an emergency stop button (3).
5. The infrared detection system for defects of turbine blades fused to a constant temperature heating cabinet according to claim 4, wherein: the industrial touch screen (1) adopts a SIEMENS6AV6648-0CE11-3AX0 industrial touch screen.
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| CN202010657166.6A CN111721810B (en) | 2020-07-09 | 2020-07-09 | Turbine blade defect infrared detection system integrated with constant temperature heating box |
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| CN202010657166.6A CN111721810B (en) | 2020-07-09 | 2020-07-09 | Turbine blade defect infrared detection system integrated with constant temperature heating box |
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| CN112396717B (en) * | 2020-11-19 | 2022-04-19 | 洛阳双瑞风电叶片有限公司 | Automatic inspection device for inner cavity of wind power blade |
| CN113567492A (en) * | 2021-07-26 | 2021-10-29 | 北京航空航天大学 | Nondestructive testing method and device for thermal barrier coating of turbine blade based on infrared heat dissipation |
| CN113865751A (en) * | 2021-09-29 | 2021-12-31 | 西安翔迅科技有限责任公司 | Testing system and method for turbine blade integrated thin film temperature sensor |
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Application publication date: 20200929 Assignee: HANGCHENG (TIANJIN) TECHNOLOGY CO.,LTD. Assignor: CIVIL AVIATION University OF CHINA Contract record no.: X2024980002335 Denomination of invention: An infrared detection system for turbine blade defects integrating a constant temperature heating box Granted publication date: 20230509 License type: Common License Record date: 20240228 |