CN114216960B - Turbine blade crack nondestructive test device - Google Patents
Turbine blade crack nondestructive test device Download PDFInfo
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- CN114216960B CN114216960B CN202111348471.8A CN202111348471A CN114216960B CN 114216960 B CN114216960 B CN 114216960B CN 202111348471 A CN202111348471 A CN 202111348471A CN 114216960 B CN114216960 B CN 114216960B
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- supporting device
- probe
- turbine blade
- clamping plates
- sides
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- 238000012360 testing method Methods 0.000 title abstract description 5
- 239000000523 sample Substances 0.000 claims abstract description 62
- 239000002131 composite material Substances 0.000 claims abstract description 39
- 238000009659 non-destructive testing Methods 0.000 claims abstract description 14
- 230000005284 excitation Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 230000001066 destructive effect Effects 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 16
- 230000005489 elastic deformation Effects 0.000 abstract description 3
- 230000005291 magnetic effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2693—Rotor or turbine parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a nondestructive testing device for cracks of turbine blades. The device is integrally and symmetrically arranged and comprises a clamping plate, a supporting device, a tensioning spring, a connecting bolt, a movable hinge and a composite probe; two sides of the supporting device are respectively and movably connected with the two clamping plates through corresponding movable hinges, two sides of the supporting device are also respectively and movably connected with the two clamping plates through corresponding tensioning springs, a composite probe is arranged below the supporting device, and two sides of the composite probe are respectively and movably connected with the two clamping plates through corresponding connecting bolts; turbine blade places the lower surface at the compound probe, and strutting arrangement presses downwards, and splint, strutting arrangement and compound probe's relative position change to compound probe takes place elastic deformation, makes compound probe's lower surface and turbine blade's surface closely laminate, and compound probe's operation realizes the nondestructive test to turbine blade surface. The invention improves the nondestructive testing efficiency of the turbine blade and has certain engineering significance.
Description
Technical Field
The invention relates to a nondestructive testing device for a blade in the field of blade detection, in particular to a nondestructive testing device for a crack of a turbine blade.
Background
Before the turbine blade detection probe is used, the magnetostrictive strip needs to be adhered to the tip of the turbine blade, and under the condition of detecting the turbine blade, a group of turbine blades are often detected, so that the workload of adhering the telescopic strip is huge, and the disassembly of the strip also brings huge workload to the detection of the turbine blade, so that the adhesion mode has certain defects on the detection and protection of the blade.
Because of the special curve of the turbine blades, the magnetostrictive strips are fixed by adopting a hard-link bonding mode, the bonded magnetostrictive strips cannot be reused, and the detection of the turbine blades is often a group of turbine blades instead of a turbine blade, so that the nondestructive detection of the turbine blades is huge in workload.
Therefore, there is an urgent need for a device that facilitates the installation and disassembly of magnetostrictive strips to improve the efficiency of nondestructive testing of turbine blades.
Disclosure of Invention
In order to solve the problems and the demands in the background art, the invention provides a nondestructive testing device for turbine blade cracks, which can not frequently paste and disassemble magnetostrictive strips when detecting blade groups, can also increase nondestructive testing of blades with different widths, improves the efficiency of the nondestructive testing blade groups and the adaptability of the detection blades, and can realize flexible connection of the magnetostrictive strips and the turbine blades and increase the adaptability of the nondestructive testing blades. The detection efficiency is greatly improved, and the detection variety is also richer.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the probe device is integrally and symmetrically arranged and comprises a clamping plate, a supporting device, a tensioning spring, a connecting bolt, a movable hinge and a composite probe; two sides of the supporting device are respectively and movably connected with the two clamping plates through corresponding movable hinges, two sides of the supporting device are also respectively and movably connected with the two clamping plates through corresponding tensioning springs, a composite probe is arranged below the supporting device, and two sides of the composite probe are respectively and movably connected with the two clamping plates through corresponding connecting bolts; turbine blade places the lower surface at the compound probe, and strutting arrangement presses downwards, and splint, strutting arrangement and compound probe's relative position change to compound probe takes place elastic deformation, makes compound probe's lower surface and turbine blade's surface closely laminate, and compound probe's operation realizes the nondestructive test to turbine blade surface.
Two branches are arranged on one side, close to the middle part of the probe device, of the two clamping plates, the first branches of the two clamping plates are respectively and movably connected with two sides of the supporting device through corresponding movable hinges, first spring mounting seats are arranged on the upper surfaces of the first branches of the two clamping plates, second spring mounting seats are symmetrically arranged on two sides of the upper surface of the supporting device, two ends of each tensioning spring are respectively connected with the first spring mounting seats and the second spring mounting seats, and two sides of the supporting device are respectively and movably connected with the two clamping plates through corresponding tensioning springs;
the second branches of the two clamping plates are movably connected with the two sides of the composite probe through corresponding connecting bolts respectively, and the movable hinges, the tensioning springs and the connecting bolts are arranged, so that the relative positions of the clamping plates, the supporting devices and the composite probe are changed in the downward pressing process of the supporting devices, and the flexible change of the composite probe is realized to better adapt to the curved surface radian of the turbine blade.
The composite probe comprises a magnetostrictive strip and two excitation circuits, wherein the two excitation circuits are symmetrically arranged on two sides of the upper surface of the magnetostrictive strip, the two excitation circuits are fixedly arranged on the magnetostrictive strip through a coupling agent, a space is arranged between the two excitation circuits and the supporting device, and the two excitation circuits are connected with a power supply.
The middle part of the upper surface of the supporting device is also fixedly provided with a handle.
One or more tension springs, connecting bolts and movable hinges are arranged on one side.
The invention has the beneficial effects that:
the invention greatly improves the detection efficiency, has more abundant detection types, reduces the time consumed by attaching the magnetostrictive strip in the process of detecting the blade, and greatly reduces the time required by nondestructive detection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a structural isometric view of the present invention.
FIG. 3 is a front view of the structure of the present invention when detecting the condition of a turbine blade.
Fig. 4 is a front view of a composite probe.
Fig. 5 is a top view of the composite probe.
FIG. 6 is a front view of a turbine blade.
FIG. 7 is a top view of a turbine blade.
In the figure: 1. clamping plates, 2, connecting bolts, 3, a movable hinge, 4, a tensioning spring, 5, a composite probe, 6, a supporting device, 7, turbine blades, 8, an excitation circuit, 9, magnetostrictive strips, 10, a grip, 11, a blade tip, 12 and a blade root.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in figures 1-3, the probe device is integrally and symmetrically arranged and comprises a blade magnetostriction nondestructive testing clamping plate 1, a supporting device 6, a tensioning spring 4, a connecting bolt 2, a movable hinge 3 and a composite probe 5; the two sides of the supporting device 6 are respectively movably connected with the two clamping plates 1 through the corresponding movable hinges 3, so that the clamping plates have a certain degree of freedom, the width of each fixed turbine blade can be changed, the types of the detection blade pairs are increased, the curve radians of different turbine blades can be adapted, and the composite probe can be tightly attached to the turbine blade to detect the turbine blade more strictly. The two sides of the supporting device 6 are also respectively and movably connected with the two clamping plates 1 through corresponding tensioning springs 4, and when the tensioning springs 4 are in an initial compression state, the composite probe 5 is in a state to be detected; when the composite probe 5 is bent, i.e. in a detection state, the clamping plates on both sides are tensioned, so that the springs are in a stretched state. A composite probe 5 is arranged below the supporting device 6, a space is arranged between the supporting device 6 and the composite probe 5, and two sides of the composite probe 5 are respectively and movably connected with the two clamping plates 1 through corresponding connecting bolts 2; a handle 10 is fixedly arranged in the middle of the upper surface of the supporting device 6 and is used for realizing downward pressing of the supporting device 6. One or more tension springs 4, connecting bolts 2 and movable hinges 3 are arranged on one side, and the specific number is set according to actual needs.
Turbine blade 7 is placed at the lower surface of compound probe 5, and the downward pressure of strutting arrangement 6, splint 1, strutting arrangement 6 and the relative position of compound probe 5 change to compound probe 5 takes place elastic deformation, makes the lower surface of compound probe 5 closely laminate with the surface of turbine blade 7, and the lower surface of compound probe 5 covers the surface of blade completely, and the operation of compound probe 5 realizes the nondestructive test to turbine blade surface.
Two branches are arranged on one side, close to the middle part of the probe device, of the two clamping plates 1, the first branches of the two clamping plates 1 are respectively and movably connected with two sides of the supporting device 6 through corresponding movable hinges 3, first spring mounting seats are arranged on the upper surfaces of the first branches of the two clamping plates 1, second spring mounting seats are symmetrically arranged on two sides of the upper surface of the supporting device 6, two ends of each tensioning spring 4 are respectively connected with the first spring mounting seats and the second spring mounting seats, and two sides of the supporting device 6 are respectively and movably connected with the two clamping plates 1 through corresponding tensioning springs 4;
the second branches of the two clamping plates 1 are respectively movably connected with two sides of the composite probe 5 through corresponding connecting bolts 2, and the movable hinges 3, the tensioning springs 4 and the connecting bolts 2 are arranged, so that the relative positions of the clamping plates 1, the supporting devices 6 and the composite probe 5 are changed in the downward pressing process of the supporting devices 6, and the flexible change of the composite probe 5 is realized to better adapt to the curved surface radian of the blade.
As shown in fig. 4 and 5, the composite probe 5 comprises a magnetostrictive strip 9 and two excitation circuits 8, wherein the two excitation circuits 8 are symmetrically arranged on two sides of the upper surface of the magnetostrictive strip 9, the two excitation circuits 8 are fixedly arranged on the magnetostrictive strip 9 through a coupling agent, a space is arranged between the two excitation circuits 8 and the supporting device 6, and the two excitation circuits 8 are connected with a power supply; when crack detection of the turbine blade is performed, the lower surface of the magnetostrictive strip 9 covers the blade surface and closely adheres to the turbine blade surface.
As shown in fig. 6 and 7, respectively, in front view and in plan view, the turbine blade includes a blade tip 11 and a blade root 12, and in actual inspection, the tip surface and the blade root surface of the turbine blade need to be inspected.
The working process of the invention is as follows:
when the nondestructive testing of the cracks of the turbine blade is required, the turbine blade is fixedly placed, the handle of the device is held, the device is aligned with the blade tip surface or the blade root surface of the turbine blade, and the device is pressed downwards, so that the lower surface of the composite probe can be tightly attached to the blade tip surface or the blade root surface of the blade, an ultrasonic wave guide instrument is connected with an excitation circuit of the composite probe, the excitation circuit is electrified, and ultrasonic wave guide nondestructive testing is carried out on the turbine blade through a magnetic field generated by the excitation circuit and pulses generated by the magnetostrictive strip.
Magnetostriction effect is a phenomenon in which the volume and length of a ferromagnetic body change when magnetized by an external magnetic field. The volume and length changes caused by the magnetostriction effect are tiny, but the length changes are much larger than the volume changes, and are the main objects of research and application, and are also called linear magnetostriction. According to the invention, the turbine blade has the performance of a ferromagnetic body, excitation of an external magnetic field is generated by connecting an ultrasonic wave guide instrument with an excitation circuit 8 on a composite probe 5, a detection signal is excited at a blade tip under the combined action of a magnetostrictive strip 9 and the external magnetic field, if the blade tip is damaged, the detection signal is transmitted in the blade to form a damage signal, the damage signal is received by the ultrasonic wave guide instrument, and then the damage signal is analyzed to determine the position and type of damage of the blade tip.
Claims (3)
1. The nondestructive testing device for the cracks of the turbine blades is characterized in that the probe device is integrally and symmetrically arranged and comprises a clamping plate (1), a supporting device (6), a tensioning spring (4), a connecting bolt (2), a movable hinge (3) and a composite probe (5); two sides of the supporting device (6) are respectively and movably connected with the two clamping plates (1) through corresponding movable hinges (3), two sides of the supporting device (6) are respectively and movably connected with the two clamping plates (1) through corresponding tensioning springs (4), a composite probe (5) is arranged below the supporting device (6), and two sides of the composite probe (5) are respectively and movably connected with the two clamping plates (1) through corresponding connecting bolts (2); the turbine blade (7) is placed on the lower surface of the composite probe (5), the supporting device (6) is pressed downwards, the relative positions of the clamping plate (1), the supporting device (6) and the composite probe (5) are changed, and the composite probe (5) is elastically deformed, so that the lower surface of the composite probe (5) is tightly attached to the surface of the turbine blade, and the operation of the composite probe (5) realizes nondestructive detection on the surface of the turbine blade;
two branches are arranged on one side, close to the middle part of the probe device, of the two clamping plates (1), the first branches of the two clamping plates (1) are respectively and movably connected with two sides of the supporting device (6) through corresponding movable hinges (3), first spring mounting seats are arranged on the upper surfaces of the first branches of the two clamping plates (1), second spring mounting seats are symmetrically arranged on two sides of the upper surface of the supporting device (6), two ends of each tensioning spring (4) are respectively connected with the first spring mounting seats and the second spring mounting seats, and two sides of the supporting device (6) are respectively and movably connected with the two clamping plates (1) through corresponding tensioning springs (4);
the second branches of the two clamping plates (1) are respectively and movably connected with the two sides of the composite probe (5) through corresponding connecting bolts (2), and the movable hinges (3), the tensioning springs (4) and the connecting bolts (2) are arranged, so that the relative positions of the clamping plates (1), the supporting devices (6) and the composite probe (5) are changed in the downward pressing process of the supporting devices (6), and the flexible change of the composite probe (5) is realized to better adapt to the curved radian of a turbine blade;
the composite probe (5) comprises a magnetostrictive strip (9) and two excitation circuits (8), wherein the two excitation circuits (8) are symmetrically arranged on two sides of the upper surface of the magnetostrictive strip (9), the two excitation circuits (8) are fixedly arranged on the magnetostrictive strip (9) through a coupling agent, a space is arranged between the two excitation circuits (8) and the supporting device (6), and the two excitation circuits (8) are connected with a power supply.
2. The nondestructive testing device for the cracks of the turbine blade according to claim 1, wherein a grip (10) is fixedly arranged in the middle of the upper surface of the supporting device (6).
3. A turbine blade crack non-destructive inspection apparatus according to claim 1, characterized in that the tension spring (4), the connecting bolt (2) and the living hinge (3) of one side are one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348471.8A CN114216960B (en) | 2021-11-15 | 2021-11-15 | Turbine blade crack nondestructive test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348471.8A CN114216960B (en) | 2021-11-15 | 2021-11-15 | Turbine blade crack nondestructive test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114216960A CN114216960A (en) | 2022-03-22 |
| CN114216960B true CN114216960B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111348471.8A Active CN114216960B (en) | 2021-11-15 | 2021-11-15 | Turbine blade crack nondestructive test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102622A (en) * | 2009-12-22 | 2011-06-22 | 西门子公司 | Blade deflection measurement with magnetostrictive sensor |
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| KR20180126274A (en) * | 2017-05-17 | 2018-11-27 | 두산중공업 주식회사 | ECT sensor array fixing and surface defect inspection device of the object to be inspected using the same |
| CN109752450A (en) * | 2018-12-07 | 2019-05-14 | 兰州空间技术物理研究所 | A kind of engine blade non-destructive control probe |
| CN208937540U (en) * | 2018-10-31 | 2019-06-04 | 山东晨洋动力科技有限公司 | A kind of turbine blade non-destructive testing device |
| CN112077850A (en) * | 2020-09-17 | 2020-12-15 | 中国矿业大学 | Ultrasonic nondestructive testing probe auto-collimation device based on manipulator and working method |
| CN212341109U (en) * | 2020-07-17 | 2021-01-12 | 杭州浙达精益机电技术股份有限公司 | Guide wave detection device for edge defects of turbine blades |
| CN113466332A (en) * | 2021-07-02 | 2021-10-01 | 西安交通大学 | Flexible array eddy current probe and method for detecting cracks of blade gas film hole edge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9950813B2 (en) * | 2016-02-05 | 2018-04-24 | The Boeing Company | Non-destructive inspection of airfoil-shaped body using self-propelling articulated robot |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102622A (en) * | 2009-12-22 | 2011-06-22 | 西门子公司 | Blade deflection measurement with magnetostrictive sensor |
| CN203824722U (en) * | 2012-12-05 | 2014-09-10 | 工业设备运营公司 | Rotor-blade test board and device therewith |
| CN105890826A (en) * | 2016-04-01 | 2016-08-24 | 北京工业大学 | Steel blade residual stress micro-magnetic nondestructive testing method and steel blade residual stress micro-magnetic nondestructive testing device based on incremental permeability |
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| KR20180126274A (en) * | 2017-05-17 | 2018-11-27 | 두산중공업 주식회사 | ECT sensor array fixing and surface defect inspection device of the object to be inspected using the same |
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| CN109752450A (en) * | 2018-12-07 | 2019-05-14 | 兰州空间技术物理研究所 | A kind of engine blade non-destructive control probe |
| CN212341109U (en) * | 2020-07-17 | 2021-01-12 | 杭州浙达精益机电技术股份有限公司 | Guide wave detection device for edge defects of turbine blades |
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| CN113466332A (en) * | 2021-07-02 | 2021-10-01 | 西安交通大学 | Flexible array eddy current probe and method for detecting cracks of blade gas film hole edge |
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| CN114216960A (en) | 2022-03-22 |
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