CN209821133U - Online ultrasonic detection device for internal defect extension of turbine engine rotor - Google Patents
Online ultrasonic detection device for internal defect extension of turbine engine rotor Download PDFInfo
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- CN209821133U CN209821133U CN201920533937.3U CN201920533937U CN209821133U CN 209821133 U CN209821133 U CN 209821133U CN 201920533937 U CN201920533937 U CN 201920533937U CN 209821133 U CN209821133 U CN 209821133U
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
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- 239000000523 sample Substances 0.000 claims abstract description 87
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 6
- 238000009661 fatigue test Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses an online ultrasonic testing device of turbine engine rotor internal defect extension, the device is mainly including four major parts of probe arrangement lid, ultrasonic testing subsystem, high-speed sliding ring, industrial computer. The phased array full-focusing probe and the phased array full-focusing probe for calibration are arranged on the probe mounting disc through threads. The online ultrasonic internal defect detection technology is adopted, so that online detection of internal defects of the turbine engine rotor in a rotating state is realized, and the problems that a workpiece needs to be in a static state, a test system is moved down, and the detection is carried out after disassembly are solved; the detection workload and the influence on the test progress are compressed; the problem of reasonably formulating the detection period is solved; the purpose of efficiently identifying internal defects, cracks and changes thereof is achieved. The online detection method for the internal defects of the turbine engine rotor has the characteristics of high internal defect scanning efficiency and strong identification capability, and overcomes the defects of the existing internal defect nondestructive detection technology.
Description
Technical Field
The utility model belongs to the technical field of be used for instructing or measuring the work piece characteristic, specifically be an online nondestructive test device of turbine engine rotor internal defect extension.
Background
The turbine engine rotor has high rotating speed, high temperature and high safety requirement; meanwhile, the turbine engine rotor usually has the defects of microcracks, microporosity and the like, is easy to become a fatigue source, greatly shortens the fatigue life, and seriously threatens the safety and reliability of the aeroengine. Therefore, high-precision detection work needs to be carried out on internal defects and expansion thereof, and support is provided for crack expansion research and damage tolerance research of a turbine engine rotor. When the turbine engine rotor is stopped, the cracks caused by internal defects are closed, and the method has the characteristics of weak detection signals and difficulty in identification.
The existing nondestructive detection method for internal defect extension mainly comprises a ray method and an ultrasonic method. The traditional ray method and the ultrasonic method need to stop a test piece, move down a test system, disassemble and carry out displacement detection; or the test piece keeps moving at a low speed and the ultrasonic detection probe keeps static; or the test piece is kept static, and the probe is driven to rotate and lift by arranging the rotating shaft. The above method has the following problems when used for a turbine engine rotor: the displacement detection mode needs to dismantle the tool, the test progress is seriously influenced, the workload is large, the detection period of the test is long, cracks often cannot be found in the detection process before the wheel disc breaks, and meanwhile, because the workpiece is not loaded during detection, the cracks are in a closed state, and the crack detection rate is low; the mode that the test piece moves at a low speed and the ultrasonic detection probe keeps static is limited by the fact that a tool shields key parts such as a disk center of a rotor of a turbine engine, a central hole or an eccentric hole is small in size, a defect part cannot be observed, friction and abrasion exist between a wedge block and the test piece, the test piece cannot be applied to a rotation test of the rotor of the turbine engine, the test piece can only carry out fixed-angle detection on the wheel center part in a rotation mode, and the probe is difficult to be uniformly pressurized to ensure good coupling of the probe. Therefore, the methods have the problems of low scanning efficiency and poor scanning effect for the internal defects of the turbine engine rotor.
Disclosure of Invention
For solving the problem that the turbine engine rotor internal defect extension nondestructive test that proposes in the above-mentioned technical background is inefficient, the effect is poor, the utility model provides an ultrasonic wave nondestructive test method based on-line measuring.
In order to achieve the above object, the utility model provides a following technical scheme is:
the online ultrasonic detection device for the defect expansion in the turbine engine rotor comprises a probe mounting cover, a probe, a wedge block, an ultrasonic transceiver, a high-speed slip ring, an industrial personal computer, a mandrel and a high-speed flexible shaft; the turbine engine rotor to be tested is fastened through a locking nut and forms a whole with the mandrel, the probe mounting cover and the lower cover; the probe mounting cover is provided with a first bolt hole, and a phased array full-focusing probe is arranged in the first bolt hole; a first groove is formed in the first bolt hole close to the rotor end of the turbine engine, and a first wedge block is placed in the first groove; the probe mounting cover is provided with second bolt holes at symmetrical positions relative to the first bolt holes, the phased array full-focusing probe for calibration is arranged in each second bolt hole, a second groove is formed in the position, close to the rotor end of the turbine engine, of each second bolt hole, and a second wedge block is arranged in each second groove; the phased array full-focusing probe and the phased array full-focusing probe for calibration are arranged in respective bolt holes through threads; the first wedge block and the second wedge block are fixed through the compression effect of the probe mounting disc and the turbine engine rotor;
the center of the mandrel is provided with a hollow mounting part for mounting and fixing the ultrasonic transceiver; the ultrasonic transceiver is connected with the phased array full-focusing probe through a data line; the core shaft and the high-speed flexible shaft are coaxially arranged, and the end part of the high-speed flexible shaft is connected with the high-speed slip ring; the ultrasonic transceiver is connected with a moving ring wiring terminal of the high-speed slip ring through a data line penetrating through the high-speed flexible shaft, and a static ring wiring terminal of the high-speed slip ring is connected with the industrial personal computer through a conducting wire.
Preferably, the probe adopts a linear array or area array phased array full focusing probe with frequency more than 5MHz and 64 wafers and high-speed rotation resistance.
Preferably, the high-speed slip ring adopts a high-speed slip ring current leading device to transmit ultrasonic testing data of the probe in a rotating state; for example, CX-24-20000RPM high-speed slip ring current leading device can be adopted, and the number of slip ring channels is 24; high speed slip ring current guides with higher channel counts can also be used when needed.
Preferably, the phased array full-focusing probe and the phased array full-focusing probe for calibration both apply tightening torque of 10N.m, so that when the turbine engine rotor rotates, the phased array full-focusing probe, the first wedge block and the turbine engine rotor are tightly attached, and the phased array full-focusing probe for calibration, the second wedge block and the turbine engine rotor are tightly attached.
Preferably, the first and second bolt holes are of the same size and configuration, and are symmetrical about the axis of rotation.
Preferably, the phased array full-focusing probe and the phased array full-focusing probe for calibration have the same model; the first wedge block and the second wedge block are the same.
Preferably, the first wedge block and the second wedge block are made of polysulfone. The wedge block plays a protection role on the probe, and friction loss caused by direct contact of the probe and the turbine engine rotor is avoided. In addition, the shape of the turbine engine rotor is not fixed, the wedge block can be adopted to adapt to the shape of the turbine engine rotor, and the probe is not suitable for use or damaged due to the change of the turbine engine rotor.
The ultrasonic transceiver generates ultrasonic signals, transmits the ultrasonic signals to the probe and receives the acquisition signals of the probe, and the ultrasonic transceiver is connected with the industrial personal computer. The phased array full-focusing probe can obtain high defect imaging resolution. The industrial personal computer is used for automatic scanning control and graphic imaging analysis processing of ultrasonic nondestructive testing.
The utility model has the advantages that: the scheme of the utility model adopts the online ultrasonic detection technology of the internal defect, realizes the online detection of the internal defect of the turbine engine rotor in the rotating state, and overcomes the problems that the workpiece needs to be in the static state, the test system is moved down, and the detection is carried out after disassembly; the detection workload and the influence on the test progress are compressed; the problem of reasonably formulating the detection period is solved; the purpose of efficiently identifying internal defects, cracks and changes thereof is achieved. The online detection method for the internal defects of the turbine engine rotor has the characteristics of high internal defect scanning efficiency and strong identification capability, and overcomes the defects of the existing internal defect nondestructive detection technology.
Drawings
FIG. 1 is a block diagram of an online ultrasonic testing device for internal defect extension of a turbine engine rotor.
FIG. 2 is a schematic view of a turbine engine rotor detection device.
FIG. 3 is a flow chart of online detection of defect propagation within a turbine engine rotor.
In the figure, 1, a mandrel, 2, a phased array full-focusing probe, 3, a probe mounting cover, 4, wedges 1 and 5, a turbine engine rotor, 6, a lower end cover, 7, a locking nut, 8, wedges 2 and 9, a phased array full-focusing probe for calibration, 10, an ultrasonic transceiver, 11, a high-speed flexible shaft, 12, a moving ring terminal, 13, a static ring terminal, 14, an industrial personal computer and 15, a high-speed slip ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in FIG. 1, the online ultrasonic detection device for the defect expansion in the rotor of the turbine engine comprises a mandrel 1, a high-speed flexible shaft 11, a probe mounting cover 3, an ultrasonic detection subsystem, a high-speed slip ring 15 and an industrial personal computer 14; the ultrasonic detection subsystem comprises a phased array full-focusing probe 2 and an ultrasonic transceiver 10; the turbine engine rotor 5 to be tested is arranged on the mandrel, one end of the turbine engine rotor is fastened through a locking nut 7, and the other end of the turbine engine rotor is fixed by the probe mounting cover 3; the probe mounting cover is provided with a first bolt hole, and the phased array full-focusing probe 2 is arranged in the first bolt hole; a first groove is formed in the end, close to the rotor 5 of the turbine engine, of the first bolt hole, and a first wedge block 4 is placed in the first groove; the probe mounting cover is provided with second bolt holes at symmetrical positions relative to the first bolt holes, phased array full-focusing probes 9 for calibration are arranged in the second bolt holes, a second groove is formed in the end, close to the rotor 5 of the turbine engine, of each second bolt hole, and a second wedge block 8 is arranged in each second groove; the phased array full-focusing probe 2 and the phased array full-focusing probe 9 for calibration are arranged in respective bolt holes through threads; the first wedge block 4 and the second wedge block 8 are fixed through the compression action of the probe mounting disc and the turbine engine rotor 5; the center of the mandrel is provided with a hollow mounting part for mounting and fixing the ultrasonic transceiver 10; the ultrasonic transceiver is connected with the phased array full focusing probe 2 through a data line; the core shaft and the high-speed flexible shaft are coaxially arranged, and the end part of the high-speed flexible shaft is connected with the high-speed slip ring; the ultrasonic transceiver is connected with a moving ring wiring terminal of the high-speed slip ring through a data line penetrating through the high-speed flexible shaft, and a static ring wiring terminal of the high-speed slip ring is connected with the industrial personal computer through a conducting wire.
The ultrasonic detection subsystem comprises a phased array full focusing probe 2. The phased array full focusing probe 2 adopts a linear array or area array phased array full focusing probe which has the frequency of more than 5MHz and 64 wafers and can resist high-speed rotation. The ultrasonic detection subsystem also comprises an ultrasonic transceiver; the ultrasonic transceiver generates ultrasonic signals, transmits the ultrasonic signals to the probe and receives the acquisition signals of the probe, and the ultrasonic transceiver is connected with the industrial personal computer. The phased array full-focus probe transmits acquired signals to an industrial personal computer through an ultrasonic transceiver, and the industrial personal computer is used for ultrasonic nondestructive testing automatic scanning control and graphic imaging analysis processing.
The high-speed slip ring adopts a CX-24-20000RPM type high-speed slip ring current leading device to transmit ultrasonic test data of the probe in a rotating state. The number of the slip ring channels is 24.
By adopting the high-frequency phased array full-focusing ultrasonic probe, the utility model solves the problem of identifying the internal defects of the turbine engine rotor and the internal defects, and reduces the complexity of detecting parameter adjustment; by adopting an online detection mode, the influence on the test progress is reduced, the workload is reduced, and further the development of an encryption test detection period and efficient defect resolution is achieved; by formulating a correct detection scheme, the problems of formulating a reasonable detection period according to the development condition of the internal defects and the like are solved; and the crack detection rate is improved.
The use process of the online detection of the defect extension in the direction of the inner part of the rotor profile of the turbine engine comprises the following steps:
(1) before testing, carrying out full-focus scanning of a turbine engine rotor displacement phased array, determining scanning parameters, determining the maximum defect of a dangerous part, and using the maximum defect as an online detection part;
(2) mounting a probe mounting disc, a first wedge block and a second wedge block according to scanning parameters; but the phased array full focusing probe and the phased array full focusing probe for calibration are not placed for trial rotation;
(3) placing the phased array full-focusing probe and the phased array full-focusing probe for calibration, starting ultrasonic detection, slowly increasing the rotating speed to a preset rotating speed, and transmitting an ultrasonic signal through the high-speed slip ring and imaging;
(4) comparing and judging whether the signals are accurate according to the imaging results of the phased array full-focusing probe and the phased array full-focusing probe for calibration, judging whether a defect crack develops to the surface according to the signals of the phased array full-focusing probe, determining the position, the shape and the size of an expansion crack, developing crack expansion simulation, and determining a detection period;
(5) removing the phased array full-focusing probe and the phased array full-focusing probe for calibration, and carrying out a staged fatigue test according to the detection period determined in the step (4);
(6) carrying out a stage fatigue test, and repeating the steps (3) to (4) after the fatigue test is finished;
(7) if the cracks do not develop to the surface, repeating the detection steps from the step (3) to the step (6) after the turbine engine rotor carries out the next-stage fatigue test; if the crack is expanded to be close to the surface, carrying out eddy current detection on the surface;
(8) judging the sizes of the interior and the surface of the crack according to the imaging result, developing crack propagation simulation, and judging whether the rotor reaches the critical point of burst; if the critical point of the explosion is not reached, repeating the processes of the steps (5) to (7); if the critical point of bursting is reached, the test is ended.
Claims (7)
1. An online ultrasonic detection device for internal defect expansion of a turbine engine rotor is characterized by comprising a mandrel (1), a high-speed flexible shaft (11), a probe mounting cover (3), an ultrasonic detection subsystem, a high-speed slip ring (15) and an industrial personal computer (14); the ultrasonic detection subsystem comprises a phased array full-focusing probe (2) and an ultrasonic transceiver (10); a turbine engine rotor (5) to be tested is arranged on the mandrel, one end of the turbine engine rotor is fastened through a locking nut (7), and the other end of the turbine engine rotor is fixed by a probe mounting cover (3); a first bolt hole is formed in the probe mounting cover, and a phased array full-focusing probe (2) is arranged in the first bolt hole; a first groove is formed in the end, close to the rotor (5) of the turbine engine, of the first bolt hole, and a first wedge block (4) is placed in the first groove; a second bolt hole is formed in the probe mounting cover at a position symmetrical to the first bolt hole, a phased array full-focusing probe (9) for calibration is arranged in the second bolt hole, a second groove is formed in the end, close to the turbine engine rotor (5), of the second bolt hole, and a second wedge block (8) is placed in the second groove; the phased array full-focusing probe (2) and the phased array full-focusing probe (9) for calibration are arranged in respective bolt holes through threads; the first wedge block (4) and the second wedge block (8) are fixed through the compression effect of the probe mounting disc and the turbine engine rotor (5);
the center of the mandrel is provided with a hollow mounting part for mounting and fixing the ultrasonic transceiver (10); the ultrasonic transceiver is connected with the phased array full-focusing probe (2) through a data line; the core shaft and the high-speed flexible shaft are coaxially arranged, and the end part of the high-speed flexible shaft is connected with the high-speed slip ring; the ultrasonic transceiver is connected with a moving ring wiring terminal of the high-speed slip ring through a data line penetrating through the high-speed flexible shaft, and a static ring wiring terminal of the high-speed slip ring is connected with the industrial personal computer through a conducting wire.
2. The online ultrasonic testing device for the internal defect extension of the turbine engine rotor as recited in claim 1, characterized in that the probe adopts a linear array or area array phased array full focusing probe with frequency greater than 5MHz, 64 wafers, and high speed rotation resistance.
3. The on-line ultrasonic detection device for the internal defect extension of the turbine engine rotor as claimed in claim 1, wherein the high-speed slip ring adopts a high-speed slip ring current leading device to transmit ultrasonic testing data of the probe in a rotating state.
4. The online ultrasonic testing device for internal defect extension of the turbine engine rotor as claimed in claim 1, wherein the phased array full focus probe and the phased array full focus probe for calibration both apply tightening torque of 10n.m, so as to ensure that the phased array full focus probe, the first wedge block and the turbine engine rotor are tightly attached when the turbine engine rotor rotates, and the phased array full focus probe for calibration, the second wedge block and the turbine engine rotor are tightly attached.
5. The on-line ultrasonic inspection device for internal defect propagation of a turbine engine rotor as claimed in claim 1, wherein said first bolt hole and said second bolt hole are identical in size and structure, and are symmetrical about the rotational axis.
6. The on-line ultrasonic testing device for the internal defect extension of the turbine engine rotor as recited in claim 5, characterized in that the phased array full focusing probe and the phased array full focusing probe for calibration have the same model; the first wedge block and the second wedge block are the same.
7. The apparatus of claim 6, wherein the first wedge and the second wedge are made of polysulfone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920533937.3U CN209821133U (en) | 2019-04-16 | 2019-04-16 | Online ultrasonic detection device for internal defect extension of turbine engine rotor |
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| CN201920533937.3U CN209821133U (en) | 2019-04-16 | 2019-04-16 | Online ultrasonic detection device for internal defect extension of turbine engine rotor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397363A (en) * | 2021-12-28 | 2022-04-26 | 合肥工业大学 | Online real-time dynamic monitoring method for rotating shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397363A (en) * | 2021-12-28 | 2022-04-26 | 合肥工业大学 | Online real-time dynamic monitoring method for rotating shaft |
| CN114397363B (en) * | 2021-12-28 | 2024-03-15 | 合肥工业大学 | Online real-time dynamic monitoring method for rotating shaft |
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