CN102109336B - Method for detecting wall thickness of working blade of complex hollow turbine - Google Patents
Method for detecting wall thickness of working blade of complex hollow turbine Download PDFInfo
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- CN102109336B CN102109336B CN 200910248662 CN200910248662A CN102109336B CN 102109336 B CN102109336 B CN 102109336B CN 200910248662 CN200910248662 CN 200910248662 CN 200910248662 A CN200910248662 A CN 200910248662A CN 102109336 B CN102109336 B CN 102109336B
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- blade
- wall thickness
- point
- template
- detecting
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Abstract
The invention relates to a method for detecting the wall thickness of a working blade of a complex hollow turbine. The blade is detected by an ultrasonic thickness measuring method and a special template; and the template comprises a blade basin template and a blade back template. The method for detecting the wall thickness of the blade comprises the following steps of: selecting two detection points, namely a point P and a point Q on the air inlet side of the blade; on the premise that the wall thickness of the point P or/and the point Q is detected to be qualified, selecting a point R on an internal channel of a margin plate of the blade; relatively fixing the blade and the blade basin template or/and the blade back template by using the points P, Q and R as positioning points, and finding each monitoring point on a blade basin or/and a blade back of the blade through a detection hole (3); and measuring the wall thickness of the blade basin or/and the blade back of the blade respectively. The method is high in operability and convenient, the position of a blade wall thickness measuring point is accurate, a wall thickness measured value is accurate, and the qualification rate and accuracy can reach 100 percent.
Description
Technical field:
The present invention relates to the detection technique without surplus, complexity, hollow high-pressure turbine working blade foundry goods, finished product blade wall thickness, a kind of method for detecting wall thickness of working blade of complex hollow turbine is provided especially.
Background technology:
In the prior art, the hollow blade that certain overhaul machine high-pressure turbine working blade belongs to convection current impact, the compound air cooling of air film is that a kind of thin-walled (wall thickness variable cross section), inner chamber are complicated, the small complex structural member of plane of bending structure; Blade is hollow-core construction, and cavity shape leaf basin, blade back are the bar shaped overlapping mode, and the transversal section of bar shaped is sphere, and rib width is very narrow.
The inner-cavity structure of this complexity makes Blade roughcast difficulty when carrying out the wall thickness detection very large.Therefore, people catch at good, the workable method for detecting wall thickness of working blade of complex hollow turbine of a kind of technique effect.
Summary of the invention:
The purpose of this invention is to provide good, the workable method for detecting wall thickness of working blade of complex hollow turbine of a kind of technique effect.
The invention provides a kind of method for detecting wall thickness of working blade of complex hollow turbine, utilize the ultrasonic thickness test method to detect; It is characterized in that:
Use dedicated templates that blade is detected; Described template specifically is divided into two kinds of leaf basin template and blade back templates, and its two structural requirement is: described main template body partly is template matrix 1, the contour shape of described template matrix 1 and size adapt with blade (its thickness is without being strict with); Be provided with on the described template matrix 1 and detect hole 3, concrete position and the number in described detection hole 3 meet the blade testing requirement, and detecting hole 3 numbers is 4～100, and each detects hole 3 and is evenly arranged on the template matrix 1;
Described method for detecting wall thickness of working blade of complex hollow turbine specific requirement is: at first select 2 check points at the blade leading edge: P point and Q point; Then detect these 2 one or both of the wall thickness of locating;
At the P point or/and the wall thickness that Q is ordered detect under the qualified prerequisite; Select 1 R at blade listrium internal channel; Utilize 3 of P, Q, R as anchor point with blade and described leaf basin template or/and the blade back template is relative fixing, and find out the leaf basin of blade or/and each monitoring point on the blade back by means of detecting hole 3; Afterwards respectively to the leaf basin of blade or/and the wall thickness of blade back measure.
Method for detecting wall thickness of working blade of complex hollow turbine of the present invention, the also preferred content of claimed lower number:
In the described method for detecting wall thickness of working blade of complex hollow turbine, 2 two ends at the distance leading edge of P, Q are not less than in the scope of 3mm and select, and the distance between 2 is not less than 5mm;
The R point is not less than 3mm apart from leading edge or exhaust limit.
Further preferred content require be: in the described method for detecting wall thickness of working blade of complex hollow turbine, 2 two ends at the distance leading edge of P, Q are not less than in the scope of 5mm and select; The R point is not less than 5mm apart from leading edge or exhaust limit.
In the described method for detecting wall thickness of working blade of complex hollow turbine, on perpendicular to the blade major axes orientation, 4 measurement cross sections are set at least, measure respectively the δ on each cross section
1, δ
2, δ
3, δ
4, δ
5min, δ
6min, δ
7, m, n amount at least 9 points; Each is measured the cross section and is parallel to each other.
In the described method for detecting wall thickness of working blade of complex hollow turbine, also be provided with fixed sturcture 2 on the employed dedicated templates, described fixed sturcture 2 concrete with P, Q, 3 corresponding settings of R, for the fixing relative position relation of dedicated templates and tested blade.
Very complicated because of the blade inner-cavity structure, when blade is carried out the wall thickness detection, need to need to select three anchor points at blade, dedicated templates is positioned at blade, could measure the blade wall thickness.
Because the blade inner-cavity structure is very complicated, so the detection of blade wall thickness seems particularly important and crucial.By designing requirement, every blade A
1～A
547 points need to be detected in the cross section, and whether the measured value of each point accurately depends on the correctness of wall thickness measuring point position.Adopt this process can solve the Blade roughcast wall thickness and detect difficult problem.
What need Special attention will be given to is that among the present invention, the use of dedicated templates is an outstanding innovative point; The detection method of the present invention that cooperates dedicated templates and use also has novelty.
The present invention takes blade leading edge (2 points), blade back listrium internal channel (a bit) location, uses dedicated templates and cooperates ultrasonic method to detect blade wall thickness, and not only the position of blade wall thickness measurement point is accurate, and its wall thickness measuring value is accurate.
In terms of existing technologies, depend in the past external import for certain overhaul machine high-pressure turbine working blade, grasp after this technology, can solve problem under one's control, satisfy the active demand of engine overhaul, reduce its overhaul cost.
Utilize blade leading edge (2 points), listrium internal channel (a bit) location, detect blade wall thickness, workable, convenient, the position of blade wall thickness measurement point is accurate, the wall thickness measuring value is accurate, qualified, accuracy rate can reach 100%.
According to this process, namely utilize blade leading edge P, Q 2 points, 1 R location of blade back listrium internal channel is used dedicated templates and is cooperated ultrasonic method to detect blade wall thickness, the position of blade wall thickness measurement point is accurate, the wall thickness measuring value is accurate, qualified, accuracy rate can reach 100%.
Description of drawings:
Fig. 1 is blade A
1～A
5The position view of cross section wall thickness measurement point;
Fig. 2 is the position view of three anchor points on the Blade roughcast;
Fig. 3 is three point measurement method leading edge δ
7The wall thickness measuring principle schematic;
Fig. 4 is one of leaf basin formwork structure synoptic diagram;
Fig. 5 is two of leaf basin formwork structure synoptic diagram;
Fig. 6 is one of leaf basin formwork structure synoptic diagram;
Fig. 7 is two of leaf basin formwork structure synoptic diagram;
Fig. 8 is blade blade A
1～A
5One of sectional view;
Fig. 9 is blade blade A
1～A
5Two of sectional view.
Embodiment:
A kind of method for detecting wall thickness of working blade of complex hollow turbine (shown in accompanying drawing 1～9) proceeds as follows successively:
Fig. 2 is seen in design and selection that Blade roughcast wall thickness detection P, Q and R are ordered.
Blade roughcast P, Q two place's wall thickness, δ
7Fig. 3 is seen in the qualified detection of wall thickness.
P, the Q two wall thickness δ of place
7After qualified, determine the position of the wall thickness measuring point on the blade then to detect the blade wall thickness with the dedicated templates of Fig. 4.
Specific requirement is as follows:
1) position of Blade roughcast blade wall thickness measuring point: Blade roughcast blade A
1～A
5Five cross section wall thickness measurement points have δ
1, δ
2, δ
3, δ
4, δ
5min, δ
6min, δ
7, m, n etc. amount to 45 points, Fig. 1 is seen in the position of each cross section wall thickness measurement point.
2) Blade roughcast wall thickness detection and location technique: it is P point and Q point that three anchor points on the blade are chosen in two of leading edges, and one of listrium internal channel is the R point, sees Fig. 2.
3) with three point measurement methods, detect the wall thickness δ of 2 of leading edge P, Q
7: three anchor points on blade according to shown in Figure 3, are measured (the method be called three point measurement methods) to Blade roughcast leading edge P, Q two A of place, B, C at 3 first after determining, its objective is and measure exactly B point δ
7Thickness.
4) determining and detection of blade wall thickness measuring point position: leading edge wall thickness δ
7Detect qualified after, with the dedicated templates of Fig. 4, lean against respectively on the anchor point of blade P, Q, R, see through the aperture of Φ 2mm on the dedicated templates with crayon, the location positioning of leaf basin, blade back wall thickness check point is got off, then respectively the wall thickness of blade and blade basin, blade back is measured.
According to this process, namely utilize blade leading edge P, Q 2 points, 1 R location of blade back listrium internal channel is used dedicated templates and is cooperated ultrasonic method to detect blade wall thickness, the position of blade wall thickness measurement point is accurate, the wall thickness measuring value is accurate, qualified, accuracy rate can reach 100%.
Now involved relevant device is described in detail as follows:
1, adopt " three point method " to measure leading edge δ among Fig. 3
7The employed locating template figure of wall thickness pattern in kind see Fig. 4～7.
2, the positioning principle process of using dedicated templates to carry out auxiliary positioning is: 1. locating template and blade are close to by anchor point on Fig. 2 with locating template first, with marking pen the measurement point on each cross section of blade leading edge is seen through aperture point on the locating template on blade (leading edge), this point is exactly the B point; 2. then locating template is taken off, find out A, C 2 points again near the B point, the leading edge of blade is thrown repaiied, deburring YT-603 type supersonic thickness meter wall-thickness measurement is thrown on the limit, also will measure with the model of leading edge simultaneously the size of each cross section outer mold surface; 3. leading edge B point δ
7Wall thickness qualified after, again locating template and blade are close to, see through aperture point on the locating template blade on the blade of blade with marking pen; 4. use again YT-603 type supersonic thickness meter to measure the wall thickness of measurement point on the blade of blade.
3, measure the used utility appliance of blade wall thickness:
(1) YT-603 type supersonic thickness meter (Russian import);
(2) C1-114/1 type oscillograph is used with YT-603 type supersonic thickness meter, is used for specially measuring the large arc surface of radius small curve.
(3) with three of the test pieces of blade same material, thickness is respectively 0.5mm, 1.0mm, 4.0mm.
(4) glycerine (glycerine) couplant.
4, ultrasonic thickness test principle:
(1) preoperative preparation: dip an amount of glycerine (glycerine) couplant with the probe of supersonic thickness meter and proofread and correct at 0.5mm, 1.0mm and three test pieces of 4.0mm respectively, again the measurement point of blade is tested after qualified (referring to that the oscillographic reading of C1-114/1 type equates with above three numerical value), observe the oscillographic reading of thicknessmeter while surveying, and outcome record is got off.
(2) blade leading edge A
1～A
5Cross section δ
7The measurement of wall thickness:
Use first the blade back template at A
1～A
5Each δ of cross section
7Find out A, B, C 3 points on the sectional position of point, see Fig. 3, and record measured value, throw while measuring and repair, until all δ
7Till the some wall thickness is qualified.
(3) blade blade A
1～A
5The measurement of cross section wall thickness:
With leading edge R
1Profile and wall thickness δ
7All the qualified Blade roughcast circular hole that at leaf basin and blade back wall thickness measuring point seen through template with the marking pen of redness or black respectively with template identifies the position of tested point, A
1～A
5Fig. 1 is seen in the position of cross section wall thickness measurement point, records simultaneously the wall thickness measuring value.
(4) A
1～A
5Sectional view 8,9.
Very complicated because of the blade inner-cavity structure, when blade is carried out the wall thickness detection, need to need to select three anchor points at blade, dedicated templates is positioned at blade, could measure the blade wall thickness.
Because the blade inner-cavity structure is very complicated, so the detection of blade wall thickness seems particularly important and crucial.By designing requirement, every blade A
1～A
545 points need to be detected in the cross section, and whether the measured value of each point accurately depends on the correctness of wall thickness measuring point position.Adopt this process can solve the Blade roughcast wall thickness and detect difficult problem.
A kind of method for detecting wall thickness of working blade of complex hollow turbine utilizes the ultrasonic thickness test method to detect; Its technical essential is:
Use dedicated templates that blade is detected; Described template specifically is divided into two kinds of leaf basin template and blade back templates, and its two structural requirement is: described main template body partly is template matrix 1, the contour shape of described template matrix 1 and size adapt with blade (its thickness is without being strict with); Be provided with on the described template matrix 1 and detect hole 3, concrete position and the number in described detection hole 3 meet the blade testing requirement, and detecting hole 3 numbers is 4～100, and each detects hole 3 and is evenly arranged on the template matrix 1;
Described method for detecting wall thickness of working blade of complex hollow turbine specific requirement is: at first select 2 check points at the blade leading edge: P point and Q point; Then detect these 2 one or both of the wall thickness of locating;
At the P point or/and the wall thickness that Q is ordered detect under the qualified prerequisite; Select 1 R at blade listrium internal channel; Utilize 3 of P, Q, R as anchor point with blade and described leaf basin template or/and the blade back template is relative fixing, and find out the leaf basin of blade or/and each monitoring point on the blade back by means of detecting hole 3; Afterwards respectively to the leaf basin of blade or/and the wall thickness of blade back measure.
In the described method for detecting wall thickness of working blade of complex hollow turbine, 2 two ends at the distance leading edge of P, Q are not less than in the scope of 3mm and select, and the distance between 2 is not less than 5mm;
The R point is not less than 3mm apart from leading edge or exhaust limit.
In the described method for detecting wall thickness of working blade of complex hollow turbine, on perpendicular to the blade major axes orientation, 4 measurement cross sections are set at least, measure respectively the δ on each cross section
1, δ
2, δ
3, δ
4, δ
5min, δ
6min, δ
7, m, n amount at least 9 points; Each is measured the cross section and is parallel to each other.
In the described method for detecting wall thickness of working blade of complex hollow turbine, also be provided with fixed sturcture 2 on the employed dedicated templates, described fixed sturcture 2 concrete with P, Q, 3 corresponding settings of R, for the fixing relative position relation of dedicated templates and tested blade.
Very complicated because of the blade inner-cavity structure, when blade is carried out the wall thickness detection, need to need to select three anchor points at blade, dedicated templates is positioned at blade, could measure the blade wall thickness.
Because the blade inner-cavity structure is very complicated, so the detection of blade wall thickness seems particularly important and crucial.By designing requirement, every blade A
1～A
547 points need to be detected in the cross section, and whether the measured value of each point accurately depends on the correctness of wall thickness measuring point position.Adopt this process can solve the Blade roughcast wall thickness and detect difficult problem.
What need Special attention will be given to is that in the present embodiment, the use of dedicated templates is an outstanding innovative point; The detection method of the present invention that cooperates dedicated templates and use also has novelty.
Present embodiment is taked blade leading edge (2 points), blade back listrium internal channel (a bit) location, uses dedicated templates and cooperates ultrasonic method to detect blade wall thickness, and not only the position of blade wall thickness measurement point is accurate, and its wall thickness measuring value is accurate.
In terms of existing technologies, depend in the past external import for certain overhaul machine high-pressure turbine working blade, grasp after this technology, can solve problem under one's control, satisfy the active demand of engine overhaul, reduce its overhaul cost.
Utilize blade leading edge (2 points), listrium internal channel (a bit) location, detect blade wall thickness, workable, convenient, the position of blade wall thickness measurement point is accurate, the wall thickness measuring value is accurate, qualified, accuracy rate can reach 100%.
According to this process, namely utilize blade leading edge P, Q 2 points, 1 R location of blade back listrium internal channel is used dedicated templates and is cooperated ultrasonic method to detect blade wall thickness, the position of blade wall thickness measurement point is accurate, the wall thickness measuring value is accurate, qualified, accuracy rate can reach 100%.
Present embodiment and embodiment 2 contents are basic identical, and its difference is:
In the described method for detecting wall thickness of working blade of complex hollow turbine, in that 5 measurement cross sections are set perpendicular to the blade major axes orientation, measure respectively the δ on each cross section
1, δ
2, δ
3, δ
4, δ
5min, δ
6min, δ
7, m, n amount at least 9 points; Each is measured the cross section and is parallel to each other.
2 two ends at the distance leading edge of P, Q are not less than in the scope of 5mm and select; The R point is not less than 5mm apart from leading edge or exhaust limit.
Claims (3)
1. a method for detecting wall thickness of working blade of complex hollow turbine utilizes the ultrasonic thickness test method to detect; It is characterized in that:
Use dedicated templates that blade is detected; Described template specifically is divided into two kinds of leaf basin template and blade back templates, and its two structural requirement is: described main template body partly is template matrix (1), and the contour shape of described template matrix (1) and size adapt with blade; Be provided with on the described template matrix (1) and detect hole (3), concrete position and the number in described detection hole (3) meet the blade testing requirement, and detecting hole (3) number is 4～100, and each detects hole (3) and is evenly arranged on the template matrix (1);
Described method for detecting wall thickness of working blade of complex hollow turbine specific requirement is: at first select 2 check points at the blade leading edge: P point and Q point; Then detect these 2 one or both of the wall thickness of locating;
At the P point or/and the wall thickness that Q is ordered detect under the qualified prerequisite; Select 1 R at blade listrium internal channel; Utilize 3 of P, Q, R as anchor point with blade and described leaf basin template or/and the blade back template is relative fixing, and find out the leaf basin of blade or/and each monitoring point on the blade back by means of detecting hole (3); Afterwards respectively to the leaf basin of blade or/and the wall thickness of blade back measure;
In the described method for detecting wall thickness of working blade of complex hollow turbine, also be provided with fixed sturcture (2) on the employed dedicated templates, described fixed sturcture (2) concrete with P, Q, 3 corresponding settings of R, for the fixing relative position relation of dedicated templates and tested blade.
2. according to the described method for detecting wall thickness of working blade of complex hollow turbine of claim 1, it is characterized in that: in the described method for detecting wall thickness of working blade of complex hollow turbine, 2 two ends at the distance leading edge of P, Q are not less than in the scope of 3mm and select, and the distance between 2 is not less than 5mm;
The R point is not less than 3mm apart from leading edge or exhaust limit.
3. according to the described method for detecting wall thickness of working blade of complex hollow turbine of claim 2, it is characterized in that: in the described method for detecting wall thickness of working blade of complex hollow turbine, 2 two ends at the distance leading edge of P, Q are not less than in the scope of 5mm and select;
The R point is not less than 5mm apart from leading edge or exhaust limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910248662 CN102109336B (en) | 2009-12-23 | 2009-12-23 | Method for detecting wall thickness of working blade of complex hollow turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910248662 CN102109336B (en) | 2009-12-23 | 2009-12-23 | Method for detecting wall thickness of working blade of complex hollow turbine |
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| Publication Number | Publication Date |
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| CN102109336A CN102109336A (en) | 2011-06-29 |
| CN102109336B true CN102109336B (en) | 2013-02-20 |
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| CN 200910248662 Expired - Fee Related CN102109336B (en) | 2009-12-23 | 2009-12-23 | Method for detecting wall thickness of working blade of complex hollow turbine |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557812A (en) * | 2013-10-19 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Template used for measuring thickness of wall of high pressure turbine blade and application thereof |
| CN103673829A (en) * | 2013-12-15 | 2014-03-26 | 无锡透平叶片有限公司 | Method for quickly detecting thickness of lower surface of blade in high-temperature thermal state |
| CN104457501B (en) * | 2014-11-29 | 2017-07-28 | 无锡透平叶片有限公司 | A kind of method of quick detection blade sectional thickness size |
| CN106500640A (en) * | 2016-10-11 | 2017-03-15 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of method calibrated by engine blade measurement apparatus |
| CN107990854A (en) * | 2017-12-01 | 2018-05-04 | 中国航发动力股份有限公司 | A kind of multi-joint guide vane ultrasonic thickness measurement method of engine |
| CN109613027A (en) * | 2018-11-29 | 2019-04-12 | 中国航发沈阳黎明航空发动机有限责任公司 | To the process unit and method of turbo blade leading edge air film hole X-ray detection |
| CN109373944B (en) * | 2018-12-04 | 2021-11-05 | 湖南大学 | Air foil bearing air film thickness measuring system and method based on ultrasonic waves |
| CN110296644B (en) * | 2019-06-24 | 2021-08-31 | 中国航发动力股份有限公司 | Tool and method for measuring blade polishing and repairing variable quantity |
| CN110926384A (en) * | 2019-11-19 | 2020-03-27 | 中国人民解放军第五七一九工厂 | Method for detecting wall thickness of high-pressure turbine blade of turbojet engine by ultrasonic waves |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101074863A (en) * | 2006-04-26 | 2007-11-21 | 斯奈克玛 | Wall thickness measurement, in particular of a vane, by eddy currents |
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2009
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101074863A (en) * | 2006-04-26 | 2007-11-21 | 斯奈克玛 | Wall thickness measurement, in particular of a vane, by eddy currents |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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Granted publication date: 20130220 Termination date: 20201223 |