CN109696484A - A kind of steam turbine blade root phased array supersonic flaw detection calibration block - Google Patents
A kind of steam turbine blade root phased array supersonic flaw detection calibration block Download PDFInfo
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- CN109696484A CN109696484A CN201810200288.5A CN201810200288A CN109696484A CN 109696484 A CN109696484 A CN 109696484A CN 201810200288 A CN201810200288 A CN 201810200288A CN 109696484 A CN109696484 A CN 109696484A
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- blade root
- steam turbine
- flaw detection
- turbine blade
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 230000007547 defect Effects 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 11
- 238000012545 processing Methods 0.000 abstract description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
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- 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
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- 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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- 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)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of phased array supersonic flaw detection calibration blocks of steam turbine blade root, the test block is hexahedron pyramidal structure, its top surface (1) is trapezoidal, bottom surface (3) is rectangle, left side and right side are trapezoidal, leading flank and trailing flank are inclined-plane, are carved with a plurality of crack defect (2) respectively.Compared with prior art, the present invention refers to blade root pattern and stress collected state, using " upper ladder lower section " three-dimensional pyramidal structure and in tower test block two sides processing criterion crack defect, the situation that blade root phased-array ultrasonic is calibrated without specific aim reference block in industry is compensated for, it is enough that sensitivity calibration is carried out to steam turbine different types blade root different angle different depth defect.
Description
Technical field
The present invention relates to a kind of non-destructive testing phased-array ultrasonic calibration blocks, more particularly, to a kind of steam turbine blade root
With phased array supersonic flaw detection calibration block.
Background technique
Turbine rotor is one of the critical component of large-scale thermal power machine group, and turbine blade root is as high-speed rotation
Component easily because of manufacturing defect, material property and bears powerful centrifugal force, curved power in high temperature, high pressure, running at high speed
Fracture accident occurs with the factors such as torsion.Turbine rotor blade root is often imbedded in impeller internal, if cannot find to exist in time
Defect, it will cause blade to fly off, cause serious production accident
Conventional detection means are due to structure and limited space at present, and detection zone and detection sensitivity are limited, phased array
Ultrasonic wave is as a kind of relatively new detection means.At present temporarily without targetedly specially debugging standard examination in terms of steam turbine blade root
Block, the debugging of phased-array ultrasonic detection industry sensibility in practice are mostly used with I A of CSK- described in NB/T 47013.3 and CSK- II
A test block carries out Universal debugging, it is contemplated that blade root flaw detection predominantly detection stress concentrates cambered surface crack defect, considers blade root type itself
Formula and defect all have uniqueness, and CSK test block faultiness design is the long cross-drilled hole defect of standard, are chiefly used in sensitive in weld seam detection
Degree debugging, shortage is comparative, easily causes error, greatly reduces the meaning of adjustment of sensitivity.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of structures simply, is directed to
Property strong, practicability and the steam turbine blade root of strong operability detected a flaw calibration block with phased array supersonic, visited for commissioning device sensitivity
Wound is used, and is solved in current industry the detection of blade root phased-array ultrasonic and is had no the situation that application specific standard test block is debugged, so that
The flaw detection of steam turbine phased-array ultrasonic blade root is more accurate, reliable.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of steam turbine blade root phased array supersonic flaw detection calibration block, the test block is hexahedron pyramidal structure,
Top surface be it is trapezoidal, bottom surface is rectangle, left side and right side be it is trapezoidal, leading flank and trailing flank are inclined-plane, are carved with respectively more
Crack defect.
The height of each Crack defect is different, and the crack defect of leading flank and trailing flank is staggered.
The depth of each Crack defect on the leading flank is different, the depth of each Crack defect on trailing flank
It spends different.
The length on the side on the top surface is greater than the length of the relative edge on bottom surface.
The calibration block is furnished with graduated scale, for measuring the spacious angle of leading flank and trailing flank.
The calibration block is consistent in left and right lengthwise dimension with graduated scale, and scale value shows the folder on inclined-plane and top surface
Angle opens angle to measure inclined-plane.
Compared with prior art, the invention has the following advantages that
(1) blade root pattern and stress collected state are referred to, using " upper ladder lower section " three-dimensional pyramidal structure and in tower test block
Two sides processing criterion crack defect, compensates for the shape that blade root phased-array ultrasonic is calibrated without specific aim reference block in industry
Condition.
(2) sensitivity calibration can be carried out to steam turbine different types blade root different angle different depth defect.
(3) small in size, it is convenient for carrying, carries out device sensitivity at any time convenient for working site and calibrated.
(4) structure is simple, and design is light and handy, low cost.
Detailed description of the invention
Fig. 1 is the present embodiment reference block stereoscopic schematic diagram；
Fig. 2 is the present embodiment reference block schematic front view；
Fig. 3 is the present embodiment reference block right side view；
Fig. 4 is the scale rear sight schematic diagram that the present embodiment reference block is equipped with.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
The steam turbine blade root of the present embodiment detects a flaw calibration block with reference to blade root pattern and stress concentration shape with phased array supersonic
State, change is numerous to go letter, retains its effective ontology and two lateral stress concentrating structure positions, is set with " upper ladder lower section " three-dimensional pyramidal structure
Meter makes standard crack defect at the different depth of two sides, accomplishes can to cover current most type of blade root, at the same for convenient for
The needs that inclined-plane difference opens angle are measured, configuration one can mark the steel plate graduated scale that two sides inclined-plane opens angle, graduated scale and test block
It is consistent in lengthwise dimension, it is placed in the centerline in upper trapezoid face, scale value shows the angle in skew back face and upper detection faces
Degree opens angle (i.e. the angle of the scale present position top surface and side) to measure inclined-plane, can satisfy different to different type of blade root
Angles and positions deep defects carry out sensitivity calibration, are widely used, versatile, so that detection is more accurate and reliable.
As shown in figures 1-4, top surface 1 is big trapezoidal, and bottom surface 3 is narrow rectangle, and test block two sides different depth, which is taken, to be staggered
Mode respectively make the standard crack defect 2 of 3 different depths, the specific depth of defect is according to meet most different types blade roots
Demand Design simulates the stress concentration region (being also easy to produce the region of crackle) in steam turbine blade root, while Aided design one is steel
Board foot is convenient for the spacious angle on measurement two sides inclined-plane, to meet the needs of more accurately debugging the sensitivity of different types blade root.
In use, by taking phased-array ultrasonic blade root detects a flaw common fan sweeping (recommendation) as an example, first in fan sweeping angular range
Each sound velocity calibration to guarantee that equipment performance itself is met the requirements of the standard, then carrying out sensitivity with this test block, (i.e. ACG is repaired
Just) to calibrate, the specific depth and position for choosing crackle can be reference according to practical type of blade root and with the second tooth depth (recommendation),
The crackle for choosing approximate location and depth in test block with graduated scale, by its echo amplitude be adjusted to appropriate height all over the screen (such as
90%), as Scanning sensitivity；TCG sensitivity amendment, measurement blade root two sides first to third mark of mouth groove depth are as adjusting model
It encloses, chooses the corresponding approximate range crackle of test block, by gate lock different depth defect maximum reflection echo, acquire and pass through and be
System gain compensation makes each deep defects echo reach identical amplitude (such as 80%), finally selects point-rendering TCG curve, so
It is detected accordingly with this afterwards.
Claims (6)
1. a kind of phased array supersonic flaw detection calibration block of steam turbine blade root, which is characterized in that the test block is hexahedron tower
Type structure, top surface (1) be it is trapezoidal, bottom surface (3) are rectangle, left side and right side be it is trapezoidal, leading flank and trailing flank are
Inclined-plane is carved with a plurality of crack defect (2) respectively.
2. a kind of steam turbine blade root according to claim 1 phased array supersonic flaw detection calibration block, which is characterized in that each
The height of Crack defect (2) is different, and the crack defect (2) of leading flank and trailing flank is staggered.
3. a kind of steam turbine blade root according to claim 1 phased array supersonic flaw detection calibration block, which is characterized in that institute
The depth of each Crack defect (2) on the leading flank stated is different, and the depth of each Crack defect (2) on trailing flank is mutual
It is not identical.
4. a kind of steam turbine blade root according to claim 1 phased array supersonic flaw detection calibration block, which is characterized in that institute
The length on the side on top surface (1) stated is greater than the length of the relative edge on bottom surface (3).
5. a kind of steam turbine blade root according to claim 1 phased array supersonic flaw detection calibration block, which is characterized in that institute
The calibration block stated is furnished with graduated scale, for measuring the spacious angle of leading flank and trailing flank.
6. a kind of steam turbine blade root according to claim 5 phased array supersonic flaw detection calibration block, which is characterized in that institute
The calibration block stated is consistent in left and right lengthwise dimension with graduated scale, and scale value shows the angle on inclined-plane and top surface, with measurement
Inclined-plane opens angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200288.5A CN109696484B (en) | 2018-03-12 | 2018-03-12 | Phased array ultrasonic flaw detection calibration test block for turbine blade root |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200288.5A CN109696484B (en) | 2018-03-12 | 2018-03-12 | Phased array ultrasonic flaw detection calibration test block for turbine blade root |
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| CN109696484A true CN109696484A (en) | 2019-04-30 |
| CN109696484B CN109696484B (en) | 2023-12-12 |
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Cited By (1)
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| CN110133116A (en) * | 2019-06-03 | 2019-08-16 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | A kind of wind-power tower coating detection test block |
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| CN109696484B (en) | 2023-12-12 |
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