CN108614034A - Wind power generation blade molds the ultrasonic detection method of trailing web and crossbeam bonding defect - Google Patents

Wind power generation blade molds the ultrasonic detection method of trailing web and crossbeam bonding defect Download PDF

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Publication number
CN108614034A
CN108614034A CN201611128804.5A CN201611128804A CN108614034A CN 108614034 A CN108614034 A CN 108614034A CN 201611128804 A CN201611128804 A CN 201611128804A CN 108614034 A CN108614034 A CN 108614034A
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China
Prior art keywords
web
wave
crossbeam
bonding
defect
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CN201611128804.5A
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Chinese (zh)
Inventor
贺安源
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Suzhou Tian Shun Feng Electric Blade Technology Co Ltd
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Suzhou Tian Shun Feng Electric Blade Technology Co Ltd
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Priority to CN201611128804.5A priority Critical patent/CN108614034A/en
Publication of CN108614034A publication Critical patent/CN108614034A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating 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
    • G01N29/04Analysing solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/023Solids

Abstract

A kind of ultrasonic detection method of wind power generation blade molding trailing web and crossbeam bonding defect, includes the following steps:Test block is made according to web to be checked and crossbeam bonding work pieces material;According to related process standard, calibration flaw is made in test block;According to web to be checked and the selected probe specification of crossbeam bonding work pieces material;Connection probe and supersonic reflectoscope;Probe is placed in test block, supersonic reflectoscope is calibrated according to reflection configuration;Probe is placed in web to be checked on crossbeam bonding work pieces blade shell to move back and forth.Present invention greatly enhances monitoring property, Detection accuracy and the efficiency of detection to web and crossbeam bonding quality.

Description

Wind power generation blade molds the ultrasonic detection method of trailing web and crossbeam bonding defect
Technical field
It is especially a kind of Nian Jie with crossbeam for wind power generation blade molding trailing web the present invention relates to wind power generation blade The ultrasonic detection method of defect.
Background technology
With the continuous improvement of wind-driven generator single-machine capacity, wind power generation blade also the more does the more big, adjoint material, work The requirement of skill level and quality is also higher and higher.Composite material is with its higher specific strength, specific stiffness and good fatigue resistance It is widely applied in wind power generation blade with corrosion resistance.Factor due to influencing composite structure integrality compares More, the small difference of many technological parameters can all cause it to generate defect so that and product quality generates larger discreteness, these Defect seriously affects the mechanicalness and integrality of blade.Wind power generation blade design needs to meet 20 or more working life, lacks Sunken presence can further extend during blade is run under the influence of complicated alternating load, cause local weak district, And finally reduce the working life of blade.Due to the structure of wind power generation blade and the particularity of operating condition, need to wind-force Power generation blade internal flaw situation is found, to ensure product quality, meets design and use requirement.
Invention content
In order to overcome drawbacks described above, the present invention to provide a kind of ultrasonic detection method, the ultrasonic detection method is not only It can determine the boundary of web to be checked and adhesive linkage in crossbeam bonding work pieces, additionally it is possible to determine defective locations and size.
The present invention in order to solve its technical problem used by technical solution be:A kind of wind power generation blade molding trailing web With the ultrasonic detection method of crossbeam bonding defect, it is characterized in that:Include the following steps:1) Nian Jie with crossbeam according to web to be checked Workpiece material makes test block;2) according to related process standard, calibration flaw is made in test block;3) according to web to be checked and crossbeam The selected probe specification of bonding work pieces material;4) connection probe and supersonic reflectoscope;5) probe is placed in test block, according to reflection Waveform calibrates supersonic reflectoscope, specifically comprises the following steps:1. measuring the thickness of zero point correction test block;2. opening ultrasonic wave Probe is fitted in the good structure glue test block of coupling by detector using couplant or water coincidence solution, into operation interface, Set " sound path " to the value that previous step measures, unit mm presses " zero test " or " zero-bit calculating ", " velocity of sound successively Calculate " key, it is successfully tested the measurement of determination and acoustic velocity of material that zero can be completed;3. by probe placement in reference block upper abdomen The qualified region of plate bonding, presses " gain " or " decaying " key, finds out the wave amplitude of web bottom wave and be adjusted to defectoscope height all over the screen 80%, adjust gain makes web bottom wave wave amplitude be always positioned at all over the screen 80% of instrument in due course during flaw detection;6) probe is set Move back and forth on crossbeam bonding work pieces blade shell in web to be checked, carries out scanning from blade root to blade tip, range request is crossed in scanning Two measuring point spacing are not more than 250mm, and carry out glue width position label to each measuring point, and parallel lines are then carried out between two measuring points It scans, Scanning speed requirement≤150mm/s in scanning process;7) according to ultrasonic reflections waveform, with ultrasonic wave wave character Diagnostic method determine defective locations and size, specifically include following steps:1. probe is placed in the intact position of bonding, pulse is observed Transmitted wave signal in scanning process, works as web -- and Air Interface echo wave amplitude reduces, and the primary bottom wave of crossbeam or structure glue one When secondary bottom wave amplitude increases, as it is bonded boundary and occurs;2. making web -- Air Interface echo wave amplitude reduces half, confirms bonding edge The specific location on boundary;3. repeating above step, the possible boundary of bonding region is found out from different directions, marks bonding region side Boundary;4. if the effective adhesion width of structure glue is unsatisfactory for technological standards, that is, it is insufficient to squeeze out glue, it is desirable that sketched out in blade surface with pen Defect profile shape, and draw the web profile of the defect area;If 5. within effective glue wide scope, it is whole in region of detecting a flaw Under thickness is unchanged and coupling effect unanimous circumstances, there is multiple phase in the same horizontal line in web -- Air Interface echo Position variation, as bonding plane surface layer bubble, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the defect area The web profile in domain;If 6. within effective glue wide scope, and both the primary bottom wave of crossbeam, the primary bottom wave of structure glue are unchanged simultaneously Under coupling effect unanimous circumstances, web -- Air Interface echo disappears, as cavity, it is desirable that is sketched out in blade surface with pen Defect profile shape, and draw the web profile of the defect area;If 7. thickness cases thickness is unchanged simultaneously in flaw detection region Under coupling effect unanimous circumstances, there is signal decaying and shows with phase shift in a certain range in crossbeam primary bottom wave signal As half-dried yarn or non-wetting that is, in shell, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the defect The web in region is bonded facial contour;If 8. in the case where coupling unanimous circumstances, any waveform suddenly disappears in screen original position, occurs In the position closer to zero, as lamination defect, it is desirable that sketch out defect profile shape in blade surface with pen, and draw this The web of defect area is bonded facial contour.
As being further improved for technical solution of the present invention, the diagnostic method of the ultrasonic wave wave character is half-wave boundary Method.
As being further improved for technical solution of the present invention, the diagnostic method of the ultrasonic wave wave character is secondary half-wave side Boundary's method.
As being further improved for technical solution of the present invention, the diagnostic method of the ultrasonic wave wave character is minimum echo Method.
The beneficial effects of the invention are as follows:Web crossbeam bonding quality nondestructive detection system provided by the invention and method, wound Ultrasonic detecting equipment and ultrasonic wave basic principle newly are introduced into web and crossbeam bonding quality non-destructive testing, has filled up wind The blank of power power generation blade web non-destructive testing Nian Jie with crossbeam greatly improves supervising to web and crossbeam bonding quality Control property, the efficiency of Detection accuracy and detection.
Description of the drawings
Fig. 1 is web to be checked and crossbeam bonding work pieces structural schematic diagram.
Fig. 2 is test block structural schematic diagram.
Fig. 3 is the schematic diagram for being placed in test block and calibrating supersonic reflectoscope that will pop one's head in.
Fig. 4 is the schematic diagram for being placed in and moving back and forth on web to be checked and crossbeam bonding work pieces that will pop one's head in.
Fig. 5 is to position defective locations and the schematic diagram of size.
The figures above is compareed, explanation is supplemented as follows:
1--- webs to be checked and crossbeam bonding work pieces 11--- blade shells
12--- adhesive linkage 13--- webs
2--- test block 21--- blade shells
22--- adhesive linkage 23--- webs
24--- through-holes 3--- probes
Specific implementation mode
A kind of ultrasonic detection method of wind power generation blade molding trailing web and crossbeam bonding defect, including walk as follows Suddenly:
1) test block is made according to web to be checked and crossbeam bonding work pieces material;
2) according to related process standard, calibration flaw is made in test block;
3) according to web to be checked and the selected probe specification of crossbeam bonding work pieces material;
4) connection probe and supersonic reflectoscope;
5) probe is placed in test block, supersonic reflectoscope is calibrated according to reflection configuration, is specifically comprised the following steps:1. measuring Take the thickness of zero point correction test block;2. opening supersonic reflectoscope, probe is fitted in using couplant or water coincidence solution It couples in good structure glue test block, into operation interface, sets " sound path " to the value that previous step measures, unit is Mm presses " zero test " or " zero-bit calculating ", " velocity of sound calculating " key, is successfully tested the determination that zero can be completed and material successively The measurement of the velocity of sound;3. probe placement is bonded qualified region in reference block epiplastron, " gain " or " decaying " key is pressed, abdomen is found out The wave amplitude of board bottom wave is simultaneously adjusted to the 80% of defectoscope height all over the screen, and in due course adjust gain makes web bottom wave wave during flaw detection Width is always positioned at all over the screen 80% of instrument;
6) probe is placed in web to be checked on crossbeam bonding work pieces blade shell to move back and forth, is carried out from blade root to blade tip Scanning, scanning crosses two measuring point spacing of range request and is not more than 250mm, and carries out glue width position label to each measuring point, then to two Carry out parallel line sweeping between measuring point, Scanning speed requirement≤150mm/s in scanning process;
7) according to ultrasonic reflections waveform, defective locations and size are determined with the diagnostic method of ultrasonic wave wave character, are had Body includes the following steps:1. probe is placed in the intact position of bonding, impulse ejection wave signal is observed, in scanning process, work as abdomen Plate -- Air Interface echo wave amplitude reduces, and when the primary bottom wave of crossbeam or the primary bottom wave amplitude of structure glue increase, as bonding edge Boundary occurs;2. making web -- Air Interface echo wave amplitude reduces half, confirms the specific location on bonding boundary;3. repeating the above step Suddenly, the possible boundary of bonding region is found out from different directions, marks bonding region boundary;If 4. the effective adhesion width of structure glue Technological standards are unsatisfactory for, that is, it is insufficient to squeeze out glue, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the defect The web profile in region;If 5. within effective glue wide scope, integral thickness is unchanged in region of detecting a flaw and coupling effect is consistent In the case of, there is multiple phase change, as bonding plane surface layer gas in the same horizontal line in web -- Air Interface echo Bubble, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the web profile of the defect area;If 6. effective Within glue wide scope, and under the unchanged and coupling effect unanimous circumstances of both the primary bottom wave of crossbeam, the primary bottom wave of structure glue, abdomen Plate -- Air Interface echo disappears, as cavity, it is desirable that sketches out defect profile shape in blade surface with pen, and draws this and lack Fall into the web profile in region;If 7. under thickness cases thickness is unchanged and coupling effect unanimous circumstances in flaw detection region, greatly The primary bottom wave signal of beam occur in a certain range signal decaying with phase shift the phenomenon that, i.e., in shell half-dried yarn or infiltrate not It is good, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the web bonding facial contour of the defect area;If 8. In the case where coupling unanimous circumstances, any waveform suddenly disappears in screen original position, appears in the position closer to zero, as divides Layer defects, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the web bonding facial contour of the defect area.
In the best mode for carrying out the invention, the diagnostic method of the ultrasonic wave wave character is half-wave boundary method.Make web -- air Interface echo wave amplitude reduces half, i.e. half-wave boundary method.
In another embodiment, the diagnostic method of the ultrasonic wave wave character is secondary half-wave boundary method.Make web -- Air Interface echo wave amplitude reduces a quarter, i.e., secondary half-wave boundary method.
In other embodiments, the diagnostic method of the ultrasonic wave wave character is minimum echo method.Make web -- air Interface echo wave amplitude is preferably minimized, i.e. minimum echo method.
In the ultrasonic detection method of wind power generation blade molding trailing web and crossbeam bonding defect of the present invention, the test block For calibrating supersonic reflectoscope, reference waveform is determined;Test block size is about 150mm*200mm, to meet detecting system just Normal verifying function;The test block material is identical as crossbeam bonding work pieces material as web to be checked.
Wind power generation blade molding trailing web of the present invention is lacked with signified in the ultrasonic detection method of crossbeam bonding defect Sunken type includes:Squeeze out insufficient glue, bubble or cavity, half-dried yarn or non-wetting, layering.
The ultrasonic detection method of wind power generation blade molding trailing web of the present invention and crossbeam bonding defect generally chooses two Kind specification probe:The normal probe of 1.0MHZ, 0.5MHZ.The probe is longitudinal wave normal probe, Nian Jie with crossbeam according to web to be checked The material selection of workpiece;The supersonic reflectoscope is matched with the probe, and preferably the function of waveform containing pulse-echo is super Sonic wave detector, the boundary and determining defective locations for determining web to be checked and adhesive linkage in crossbeam bonding work pieces and size.
Specific embodiment:Web to be checked and crossbeam bonding work pieces 1 include blade shell 11, adhesive linkage 12, abdomen (shown in Fig. 1) Plate 13, it is by adhesive (adhesive linkage 12) that blade shell 11 is mutually Nian Jie with web 13, shearing force is born with improving blade Power;Test block 2 (shown in Fig. 2) also includes blade shell 21, adhesive linkage 22, web 23 and through-hole 24, wherein the blade shell of test block 2 Material and the web to be checked and blade shell 11, adhesive linkage 12, the abdomen in crossbeam bonding work pieces 1 of body 21, adhesive linkage 22, web 23 13 material of plate is identical.Adhesive linkage 22 and 23 position of web in the test block 2 have a through-hole 24, which meets minimum technique Defect requirement.Probe 3 being placed in test block 2 according to step 5 of the present invention calibrates supersonic reflectoscope according to reflection configuration, It is specific as shown in Figure 3.Probe 3 being placed in web to be checked and moved back on crossbeam bonding work pieces 1 according to step 6 of the present invention It is dynamic, it is specific as shown in Figure 4.The defective locations and size positioned according to the present invention, as shown in Figure 5.
Web crossbeam bonding quality nondestructive detection system provided by the invention and method innovatively introduce ultrasound examination and set Standby and ultrasonic wave basic principle has filled up wind power generation blade web and crossbeam in web and crossbeam bonding quality non-destructive testing It is bonded the blank of non-destructive testing, greatly improves monitoring property, Detection accuracy and the inspection to web and crossbeam bonding quality The efficiency of survey.

Claims (4)

1. a kind of ultrasonic detection method of wind power generation blade molding trailing web and crossbeam bonding defect, it is characterized in that:Including Following steps:
1) test block is made according to web to be checked and crossbeam bonding work pieces material;
2) according to related process standard, calibration flaw is made in test block;
3) according to web to be checked and the selected probe specification of crossbeam bonding work pieces material;
4) connection probe and supersonic reflectoscope;
5) probe is placed in test block, supersonic reflectoscope is calibrated according to reflection configuration, is specifically comprised the following steps:1. measuring zero The thickness of point calibration test block;2. opening supersonic reflectoscope, probe is fitted in coupling using couplant or water coincidence solution In good structure glue test block, into operation interface, it sets " sound path " to the value that previous step measures, unit mm, according to It is secondary to press " zero test " or " zero-bit calculating ", " velocity of sound calculating " key, it is successfully tested the determination that zero can be completed and acoustic velocity of material Measurement;3. probe placement is bonded qualified region in reference block epiplastron, " gain " or " decaying " key is pressed, web bottom is found out The wave amplitude of wave is simultaneously adjusted to the 80% of defectoscope height all over the screen, and adjust gain makes the web bottom wave wave amplitude beginning in due course during flaw detection Final position in instrument it is all over the screen 80%;
6) probe is placed in web to be checked on crossbeam bonding work pieces blade shell to move back and forth, is swept from blade root to blade tip It looks into, scanning crosses two measuring point spacing of range request and is not more than 250mm, and carries out glue width position label to each measuring point, is then surveyed to two Parallel line sweeping is carried out between point, Scanning speed requirement≤150mm/s in scanning process;
7) according to ultrasonic reflections waveform, defective locations and size are determined with the diagnostic method of ultrasonic wave wave character, it is specific to wrap Include following steps:1. probe is placed in the intact position of bonding, impulse ejection wave signal is observed, in scanning process, work as web -- it is empty Vapor interface echo wave amplitude reduces, and when the primary bottom wave of crossbeam or the primary bottom wave amplitude of structure glue increase, and is as bonded boundary and occurs; 2. making web -- Air Interface echo wave amplitude reduces half, confirms the specific location on bonding boundary;3. repeating above step, never It is equidirectional to find out the possible boundary of bonding region, mark bonding region boundary;4. if the effective adhesion width of structure glue is unsatisfactory for Technological standards it is insufficient to squeeze out glue, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the defect area Web profile;If 5. within effective glue wide scope, integral thickness is unchanged and coupling effect unanimous circumstances in region of detecting a flaw Under, there is multiple phase change, as bonding plane surface layer bubble in the same horizontal line in web -- Air Interface echo, it is desirable that Defect profile shape is sketched out in blade surface with pen, and draws the web profile of the defect area;If 6. in the wide model of effective glue Within enclosing, and under the unchanged and coupling effect unanimous circumstances of both the primary bottom wave of crossbeam, the primary bottom wave of structure glue, web -- it is empty Vapor interface echo disappears, as cavity, it is desirable that sketches out defect profile shape in blade surface with pen, and draws the defect area Web profile;If 7. under thickness cases thickness is unchanged and coupling effect unanimous circumstances in flaw detection region, crossbeam is primary There is the phenomenon that signal decaying and phase shift in a certain range in bottom wave signal, i.e., half-dried yarn or non-wetting in shell are wanted It asks and sketches out defect profile shape in blade surface with pen, and draw the web bonding facial contour of the defect area;If 8. in coupling In the case that unification causes, any waveform suddenly disappears in screen original position, appears in the position closer to zero, and as layering lacks It falls into, it is desirable that sketch out defect profile shape in blade surface with pen, and draw the web bonding facial contour of the defect area.
2. the ultrasound examination side of wind power generation blade molding trailing web and crossbeam bonding defect according to claim 1 Method, it is characterized in that:The diagnostic method of the ultrasonic wave wave character is half-wave boundary method.
3. the ultrasound examination side of wind power generation blade molding trailing web and crossbeam bonding defect according to claim 1 Method, it is characterized in that:The diagnostic method of the ultrasonic wave wave character is secondary half-wave boundary method.
4. the ultrasound examination side of wind power generation blade molding trailing web and crossbeam bonding defect according to claim 1 Method, it is characterized in that:The diagnostic method of the ultrasonic wave wave character is minimum echo method.
CN201611128804.5A 2016-12-09 2016-12-09 Wind power generation blade molds the ultrasonic detection method of trailing web and crossbeam bonding defect Pending CN108614034A (en)

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