CN105973996A - Ultrasonic detection method for in-service fan main shaft cracks and detection test block - Google Patents
Ultrasonic detection method for in-service fan main shaft cracks and detection test block Download PDFInfo
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- CN105973996A CN105973996A CN201610567980.2A CN201610567980A CN105973996A CN 105973996 A CN105973996 A CN 105973996A CN 201610567980 A CN201610567980 A CN 201610567980A CN 105973996 A CN105973996 A CN 105973996A
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000004088 simulation Methods 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims abstract description 19
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 151
- 230000000638 stimulation Effects 0.000 claims description 64
- 238000002604 ultrasonography Methods 0.000 claims description 33
- 238000005336 cracking Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000003491 array Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 102100032884 Neutral amino acid transporter A Human genes 0.000 description 1
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- 238000004164 analytical calibration Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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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
- G01N29/04—Analysing solids
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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
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to an ultrasonic detection method for in-service fan main shaft cracks. The method comprises the following steps: setting a fan main shaft between a shell of the fan main shaft and a bearing of the fan main shaft as a detection area, forming a detection surface from a bearing inner side face of the fan main shaft to a vertical extension line in the fan main shaft, arranging a plurality of ultrasonic probes on the outer wall of the detection area, and transmitting longitudinal waves to the detection surface from an incident angle of 10-13 degrees by virtue of the ultrasonic probes. An ultrasonic detection test block for in-service fan main shaft cracks comprises a cylindrical test block body, wherein artificial simulated cracks arranged at intervals are formed in the circumferential surface of the outer wall on two sides of the test block body; and a manual simulation slot and a manual simulation slot with cracks are respectively formed between every two cracks. According to the method provided by the invention, ultrasonic detection can be performed on a running fan main shaft, and the fan main shaft is well protected. The detection test block disclosed by the invention can be used for adjusting the sensitivity when the in-service fan main shaft ultrasonic waves and ultrasonic phased arrays are detected.
Description
Technical field
The application monitoring ultrasonic field, is specifically related to a kind of method utilizing ultrasound examination in-service blower fan main shaft crackle, and for detecting the detection test block of crackle.
Background technology
Ultrasonic Nondestructive is now widely used Defect detection method, in working at the scene, need to use different ultrasonic examination reference block, simulating test pieces and reference blocks due to sample work piece difference, therefore the carrying amount of test block is bigger, and test block is usually steel design, weight and volume are the biggest, bring inconvenience to experimenter.Therefore, it is necessary to exploitation one can adapt to multiple detection demand simultaneously, Substitute For Partial reference block, simulating test pieces and reference block function, and volume ultrasound examination test block little, portable.
Meanwhile, blower fan main shaft is only checked before dispatching from the factory, and the blower fan main shaft run, owing to field condition is limited, it is impossible to carry out ultrasonic examination.
Summary of the invention
The purpose of the application is to propose a kind of method utilizing ultrasound examination in-service blower fan main shaft crackle；On the basis of this purpose, another object is that of the application proposes a kind of ultrasound examination test block being suitable for multiple detection demand, volume in-service blower fan main shaft crackle little, easy to carry.
The purpose of the application is achieved in that the blower fan main shaft that the ultrasonic detection method of in-service blower fan main shaft crackle includes between the shell of blower fan main shaft and the bearing of blower fan main shaft is set to detecting area, also include the test surface that the bearing medial surface of the blower fan main shaft vertically long line in blower fan main shaft is formed, being provided with some ultrasound probes axially arranged along blower fan main shaft on detecting area outer wall periphery, described ultrasound probe launches compressional wave with incident angle 10 ° 13 ° to test surface.
The ultrasound examination test block of in-service blower fan main shaft crackle includes cylindrical test block body, in test block body both sides, outer wall circumferential surface is provided with spaced manual simulation crackle, being respectively arranged with manual simulation groove and the manual simulation groove with crackle between crackle two-by-two, described manual simulation crackle includes the first crackle, the second crackle, the 3rd crackle, the 4th crackle, the 5th crackle, the 6th crackle, the 7th crackle, the 8th crackle；Described manual simulation groove includes the first simulated slot, the second simulated slot, the 3rd simulated slot, the 4th simulated slot；The described manual simulation groove with crackle includes the first fracture stimulations groove, the second fracture stimulations groove, the 3rd fracture stimulations groove, the 4th fracture stimulations groove；Between the crackle two-by-two of first to fourth crackle, wherein it is respectively arranged with the first simulated slot, the second simulated slot, the first fracture stimulations groove, the second fracture stimulations groove；It is respectively arranged with the 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the 4th fracture stimulations groove between the crackle two-by-two of the 5th to the 8th crackle.
Described manual simulation crackle is to ftracture to test block body interior, and upper end open is arranged along test block body surface circumference, and for the crackle of arc, its A/F is 0.2mm, and arc length is 10mm.
Further, the crack depth of the first crackle is 2mm, and the crack depth of the second crackle is 3mm, and the crack depth of the 3rd crackle is 4mm, and the crack depth of the 4th crackle is 5mm.
Further, the crack depth of the 5th crackle be 2mm, the crack depth of the 6th crackle be 3mm, the crack depth of the 7th crackle be 4mm, the crack depth of the 8th crackle be 5mm.
Further, the projection on the axial periphery of test block body of first to the 8th crackle is equiangularly spaced is arranged in same rounded face.
Described manual simulation groove is for offer to test block body interior, and upper end open is arranged along test block body surface circumference, and for the arcuate groove of arc, its A/F is 1mm, and arc length is 10mm.
The described manual simulation groove with crackle for offer to test block body interior, the groove that upper end open is arranged along test block body surface circumference, bottom land arrange oriented test block body interior cracking crackle.
Further, the degree of depth of the first fracture stimulations groove be 4mm, the degree of depth of the second fracture stimulations groove be 5mm, the degree of depth of the 3rd fracture stimulations groove be 4mm, the degree of depth of the 4th fracture stimulations groove be 5mm.Here the degree of depth refers to that groove depth adds crack depth.
Further, the first simulated slot, the second simulated slot, the first fracture stimulations groove, the second fracture stimulations groove, the 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the projection on the axial periphery of test block body of the 4th fracture stimulations groove is equiangularly spaced is arranged in same rounded face.
Further, the first simulated slot, the second simulated slot, the first fracture stimulations groove, the projection on the axial periphery of test block body of the second fracture stimulations groove overlap with the 5th crackle, the 6th crackle, the 7th crackle, the 8th crackle.
Further, projection the first crackle on the axial periphery of test block body of the 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the 4th fracture stimulations groove, the second crackle, the 3rd crackle, the 4th crackle overlap.
Owing to implementing technique scheme, the present processes overcomes the restriction of testing conditions under service condition, can carry out ultrasound examination at the blower fan main shaft run, preferably protect blower fan main shaft, prevent the event that the harm fan safe such as off-axis are run.When the detection test block of the application may be used for involving ultrasonic phased array detection to in-service blower fan main shaft is ultrasonic, carry out sensitivity adjusting, be beneficial to detect defect, it is ensured that blower fan main shaft safe operation.
Accompanying drawing illustrates: the concrete structure of the application is given by following drawings and Examples:
Fig. 1 is the ultrasonic detection method schematic diagram of in-service blower fan main shaft crackle；
Fig. 2 is the test block structural representation of ultrasound examination in-service blower fan main shaft crackle；
Fig. 3 is the test block A-A sectional view of ultrasound examination in-service blower fan main shaft crackle；
Fig. 4 is the test block B-B sectional view of ultrasound examination in-service blower fan main shaft crackle.
Legend: 1, the second fracture stimulations groove, the 2, first crackle, the 3, first simulated slot, 4, the second crackle, the 5, second simulated slot, the 6, the 8th crackle, 7, the 4th fracture stimulations groove, 8, the 5th crackle, the 9, the 3rd simulated slot, the 10, the 6th crackle, 11, the first fracture stimulations groove, 12, the 3rd crackle, the 13, the 4th crackle, the 14, the 4th simulated slot, 15, the 7th crackle, 16, the 3rd fracture stimulations groove, 17, blower fan main shaft, 18, shell, 19, ultrasound probe, 20, bearing, 21, test surface, 22, detecting area.
Detailed description of the invention:
The application is not limited by following embodiment, can determine specific embodiment according to the technical scheme of the application and practical situation.
Embodiment: as shown in Figure 1, the ultrasonic detection method of in-service blower fan main shaft crackle includes that the blower fan main shaft 17 between the shell 18 of blower fan main shaft 17 and the bearing 20 of blower fan main shaft 17 is set to detecting area 22, also include the test surface 21 that bearing 20 medial surface of the blower fan main shaft 17 vertically long line in blower fan main shaft 17 is formed, being provided with some ultrasound probes 19 axially arranged along blower fan main shaft 17 on detecting area 22 outer wall periphery, described ultrasound probe 19 launches compressional wave with incident angle 10.5 13 ° to test surface 21.
Reach the defect of 240 mm to detect the degree of depth, this method uses compressional wave incident, because when same Propagation, longitudinal wave velocity is more than the speed of other wave modes, penetration capacity is strong, the highest, so the workpiece that thickness is bigger can be detected to the sensitivity of crystal boundary reflection or scattering.
Simultaneously because needing the position of detection and detection faces horizontal range is 100 mm, so the method using compressional wave oblique incidence.Use compressional wave oblique incidence time, in workpiece, existing compressional wave has again shear wave, owing to longitudinal wave velocity is almost 2 times of transverse wave velocity, hence with compressional wave identify defect and quantitative time, be careful not to and shear wave blurring.
Can be calculated according to trigonometric function, ultrasound wave shape transformation and the law of refraction: incident angle is 10.5 29.9 in theoryoScope may detect crackle.When angle of incidence > 13 ° time, end ripple will disappear, and little energy shear wave will appear from.Little energy shear wave has certain impact to detection, and therefore probe angle of incidence is unsuitable > 13o；Owing to blower fan main shaft is relatively large in diameter, it is contemplated that SATT, the probe wafer size therefore producing ultrasound wave can not be too small, and this also determines probe specification and is not the most preferably less than 20 × 20mm.After considering that probe size is computed again, probe incident angle is answered > 12 .2o。
The above analysis, probe incident angle is set to 13o。
As shown in Figure 1, 2, 3, the test block of ultrasound examination in-service blower fan main shaft crackle includes cylindrical test block body, in test block body both sides, outer wall circumferential surface is provided with spaced manual simulation crackle, being respectively arranged with manual simulation groove and the manual simulation groove with crackle between crackle two-by-two, described manual simulation crackle includes first crackle the 2, second crackle the 4, the 3rd crackle the 12, the 4th crackle the 13, the 5th crackle the 8, the 6th crackle the 10, the 7th crackle the 15, the 8th crackle 6；Described manual simulation groove includes first simulated slot the 3, second simulated slot the 5, the 3rd simulated slot the 9, the 4th simulated slot 14；The described manual simulation groove with crackle includes first fracture stimulations groove the 11, second fracture stimulations groove the 1, the 3rd fracture stimulations groove the 16, the 4th fracture stimulations groove 7；Between the crackle two-by-two of first to fourth crackle, wherein it is respectively arranged with first simulated slot the 3, second simulated slot the 5, first fracture stimulations groove the 11, second fracture stimulations groove 1；The 3rd simulated slot the 9, the 4th simulated slot the 14, the 3rd fracture stimulations groove the 16, the 4th fracture stimulations groove 7 it is respectively arranged with between the crackle two-by-two of the 5th to the 8th crackle.
Described manual simulation crackle is to ftracture to test block body interior, and upper end open is arranged along test block body surface circumference, and for the crackle of arc, its A/F is 0.2mm, and arc length is 10mm.
Further, the crack depth of the first crackle 2 is 2mm, and the crack depth of the second crackle 4 is 3mm, and the crack depth of the 3rd crackle 12 is 4mm, and the crack depth of the 4th crackle 13 is 5mm.
Further, the crack depth of the 5th crackle 8 be 2mm, the crack depth of the 6th crackle 10 be 3mm, the crack depth of the 7th crackle 15 be 4mm, the crack depth of the 8th crackle 6 be 5mm.
Further, the projection on the axial periphery of test block body of first to the 8th crackle is equiangularly spaced is arranged in same rounded face.
Described manual simulation groove is for offer to test block body interior, and upper end open is arranged along test block body surface circumference, and for the arcuate groove of arc, its A/F is 1mm, and arc length is 10mm.
The described manual simulation groove with crackle for offer to test block body interior, the groove that upper end open is arranged along test block body surface circumference, bottom land arrange oriented test block body interior cracking crackle.
Further, the degree of depth of the first fracture stimulations groove 11 be 4mm, the degree of depth of the second fracture stimulations groove 1 be 5mm, the degree of depth of the 3rd fracture stimulations groove 16 be 4mm, the degree of depth of the 4th fracture stimulations groove 7 be 5mm.Here the degree of depth refers to that groove depth adds crack depth.
Further, the projection on the axial periphery of test block body of first simulated slot the 3, second simulated slot the 5, first fracture stimulations groove the 11, second fracture stimulations groove the 1, the 3rd simulated slot the 9, the 4th simulated slot the 14, the 3rd fracture stimulations groove the 16, the 4th fracture stimulations groove 7 is equiangularly spaced is arranged in same rounded face.
Further, the projection on the axial periphery of test block body of first simulated slot the 3, second simulated slot the 5, first fracture stimulations groove the 11, the second fracture stimulations groove 1 overlaps with the 5th crackle the 8, the 6th crackle the 10, the 7th crackle the 15, the 8th crackle 6.
Further, the 3rd simulated slot the 9, the 4th simulated slot the 14, the 3rd fracture stimulations groove the 16, the 4th fracture stimulations groove 7 projection the first crackle the 2, second crackle the 4, the 3rd crackle the 12, the 4th crackle 13 on the axial periphery of test block body overlaps.
Each artificial simulating crack, simulated slot and the simulated slot with crackle by the arrangement of above-mentioned equi-spaced apart axisymmetricly, it can be ensured that the accurate calibration of instrument during detection, will not calibrate because of each defective effect.
During use, by consulting the standard schedule such as GB/T6402-2008 " steel forgings ultrasonic detection method " and JB/T4730-2005 " bearing device Non-Destructive Testing ", determine and should be able to detect that when blower fan main shaft is detected the degree of depth is not less than 2mm and the length crackle not less than 10mm.
In order to ensure the sensitivity of detection, make the test block of ultrasound examination in-service blower fan main shaft crackle, calibrate in the enterprising line sensitivity of this test block, so far again manual simulation crackle, simulated slot, position, simulated slot place with crackle can be carried out ultrasound examination.
Incident angle customized is 13oUltrasound probe 19, calibrate in the enterprising line sensitivity of simulating test pieces with this ultrasound probe 19, so far position, test surface 21 place can be carried out ultrasound examination in detecting area 22 again.
Above technical characteristic constitutes the most preferred embodiment of the application, and it has stronger adaptability and optimal implementation result, can increase and decrease inessential technical characteristic according to actual needs, meet the needs of different situations.
Claims (10)
1. the ultrasonic detection method of an in-service blower fan main shaft crackle, it is characterized in that: the blower fan main shaft including between the shell of blower fan main shaft and the bearing of blower fan main shaft is set to detecting area, also include the test surface that the bearing medial surface of the blower fan main shaft vertically long line in blower fan main shaft is formed, being provided with some ultrasound probes axially arranged along blower fan main shaft on detecting area outer wall periphery, described ultrasound probe launches compressional wave with incident angle 10 ° 13 ° to test surface.
The ultrasonic detection method of in-service blower fan main shaft crackle the most as claimed in claim 1, it is characterised in that: ultrasound probe launches compressional wave with incident angle 13 ° to test surface.
3. the ultrasound examination test block of an in-service blower fan main shaft crackle, including cylindrical test block body, it is characterized in that: in test block body both sides, outer wall circumferential surface is provided with spaced manual simulation crackle, being respectively arranged with manual simulation groove and the manual simulation groove with crackle between crackle two-by-two, described manual simulation crackle includes the first crackle, the second crackle, the 3rd crackle, the 4th crackle, the 5th crackle, the 6th crackle, the 7th crackle, the 8th crackle；Described manual simulation groove includes the first simulated slot, the second simulated slot, the 3rd simulated slot, the 4th simulated slot；The described manual simulation groove with crackle includes the first fracture stimulations groove, the second fracture stimulations groove, the 3rd fracture stimulations groove, the 4th fracture stimulations groove；Between the crackle two-by-two of first to fourth crackle, wherein it is respectively arranged with the first simulated slot, the second simulated slot, the first fracture stimulations groove, the second fracture stimulations groove；It is respectively arranged with the 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the 4th fracture stimulations groove between the crackle two-by-two of the 5th to the 8th crackle.
4. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 3, it is characterized in that: described manual simulation crackle is for ftractureing to test block body interior, and upper end open is arranged along test block body surface circumference, for the crackle of arc, its A/F is 0.2mm, and arc length is 10mm.
5. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 4, it is characterised in that: the crack depth of the first crackle is 2mm, and the crack depth of the second crackle is 3mm, and the crack depth of the 3rd crackle is 4mm, and the crack depth of the 4th crackle is 5mm；The crack depth of the 5th crackle is 2mm, the crack depth of the 6th crackle is 3mm, the crack depth of the 7th crackle is 4mm, the crack depth of the 8th crackle is 5mm.
6. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 3, it is characterised in that: the projection on the axial periphery of test block body of first to the 8th crackle is equiangularly spaced to be arranged in same rounded face.
7. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 3, it is characterized in that: described manual simulation groove is for offer to test block body interior, and upper end open is arranged along test block body surface circumference, for the arcuate groove of arc, its A/F is 1mm, and arc length is 10mm.
8. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 3, it is characterized in that: the described manual simulation groove with crackle is for offer to test block body interior, the groove that upper end open is arranged along test block body surface circumference, arranges the crackle of oriented test block body interior cracking at bottom land；The degree of depth of the first fracture stimulations groove is 4mm, the degree of depth of the second fracture stimulations groove is 5mm, the degree of depth of the 3rd fracture stimulations groove is 4mm, the degree of depth of the 4th fracture stimulations groove is 5mm.
9. the test block of ultrasound examination in-service blower fan main shaft crackle as claimed in claim 8, it is characterised in that: the first simulated slot, the second simulated slot, the first fracture stimulations groove, the second fracture stimulations groove, the 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the projection on the axial periphery of test block body of the 4th fracture stimulations groove is equiangularly spaced is arranged in same rounded face.
10. the test block of the ultrasound examination in-service blower fan main shaft crackle as described in claim 6 or 9, it is characterised in that: the first simulated slot, the second simulated slot, the first fracture stimulations groove, the projection on the axial periphery of test block body of the second fracture stimulations groove overlap with the 5th crackle, the 6th crackle, the 7th crackle, the 8th crackle；Projection the first crackle on the axial periphery of test block body of 3rd simulated slot, the 4th simulated slot, the 3rd fracture stimulations groove, the 4th fracture stimulations groove, the second crackle, the 3rd crackle, the 4th crackle overlap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610567980.2A CN105973996A (en) | 2016-07-18 | 2016-07-18 | Ultrasonic detection method for in-service fan main shaft cracks and detection test block |
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| CN201610567980.2A CN105973996A (en) | 2016-07-18 | 2016-07-18 | Ultrasonic detection method for in-service fan main shaft cracks and detection test block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907594A (en) * | 2017-12-21 | 2018-04-13 | 爱德森（厦门）电子有限公司 | A kind of coupling process of in-service wind power principal axis low-angle ultrasonic monitoring sensor |
| CN110554090A (en) * | 2018-05-31 | 2019-12-10 | 北京金风科创风电设备有限公司 | Wind turbine generator and crack monitoring system and method of variable-pitch bearing of wind turbine generator |
-
2016
- 2016-07-18 CN CN201610567980.2A patent/CN105973996A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907594A (en) * | 2017-12-21 | 2018-04-13 | 爱德森（厦门）电子有限公司 | A kind of coupling process of in-service wind power principal axis low-angle ultrasonic monitoring sensor |
| CN110554090A (en) * | 2018-05-31 | 2019-12-10 | 北京金风科创风电设备有限公司 | Wind turbine generator and crack monitoring system and method of variable-pitch bearing of wind turbine generator |
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Application publication date: 20160928 |