CN115106662B - Method for online detection of air flow of inner ring air film hole of flame tube and special tool - Google Patents
Method for online detection of air flow of inner ring air film hole of flame tube and special tool Download PDFInfo
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- CN115106662B CN115106662B CN202210842692.9A CN202210842692A CN115106662B CN 115106662 B CN115106662 B CN 115106662B CN 202210842692 A CN202210842692 A CN 202210842692A CN 115106662 B CN115106662 B CN 115106662B
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- air flow
- air
- flame tube
- inner ring
- value
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 48
- 238000005553 drilling Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000010998 test method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a method for detecting air flow of an inner ring air film hole of a flame tube on line and a special tool. The air flow test method aims at finding an air flow test state required by non-product standards, and the air flow test state is required to stably run and sensitively reflect the air flow condition, so that the air flow and the air inlet pressure in the non-standard state are monitored and detected, and related data are recorded. When the air flow test is performed for the first time, air flow detection required by the standard is performed on the same part, data are recorded, a conversion relation between non-standard and standard is calibrated, and when the air flow test is performed for the first time, air flow tests under various different air inlet pressures are performed, and the optimal parameters are selected, so that the air flow test is performed on line under the condition that non-standard conditions which are easy to meet replace standard working conditions with harsh conditions. According to the detection method provided by the invention, the perforation of the air film hole and the air flow test tool are fused together, so that the integral processing period of the air film hole of the inner ring of the flame tube can be greatly compressed, and the processing efficiency is greatly improved.
Description
Technical Field
The invention belongs to the field of metal processing, and particularly relates to a method and a special tool for detecting air flow of an inner ring air film hole of a flame tube on line.
Background
The inner ring air film holes of the flame tube on the aero-engine are key technology for cooling turbine blades of the aero-engine, usually 5000-8000 cooling air film holes are formed in the wall surface of the inner ring of the flame tube, and a layer of protection air film clung to the wall surface can be formed on the wall surface of the inner ring of the flame tube by the air film holes, so that high-temperature fuel gas is separated, the base material of the flame tube can bear higher combustion temperature, and the engine generates higher thrust. In the production process, the inner ring air film hole of the flame tube has a very important technical parameter, namely the effective area, and in practice, the effective area can be generally converted into air flow.
Currently, the air flow rate of the inner ring air film holes of the flame tube can only be detected on a special and independent air flow rate table. In actual production, in order to ensure that the final flow meets the requirement, the air film hole is generally processed in multiple sections, and then air flow tests are carried out for multiple times, but only the last time is the final test, and the previous tests are all process error-proofing tests. In the period, parts are required to be repeatedly circulated between a workshop and a detection chamber, and the parts are repeatedly clamped, aligned, smeared and cleaned with protective materials, so that the detection time is almost close to the processing time of the air film hole, and therefore, the method for multiple off-line detection is time-consuming and labor-consuming, and the processing quality is also affected.
Disclosure of Invention
The invention aims to overcome the defect of multiple and offline detection of air flow of air film holes, and provides a method for online detection of air flow of air film holes of an inner ring of a flame tube, which can be used for online detection of air flow at any time, and a special tool can prevent parts from being put down to a machine tool during detection, so that the production time can be greatly reduced, and the quality hidden trouble caused by errors caused by multiple clamping and tool setting errors can be eliminated.
In order to achieve the above purpose, the technical scheme provided by the invention is a method for detecting the air flow rate of an inner ring air film hole of a flame tube on line, which mainly comprises the following steps:
step 1: setting a value of a specific pressure P, wherein P is an opening value, taking the reading stability of the gas flowmeter as a selection basis, and once the value is determined, the value cannot be changed;
step 2: hermetically treating;
Step 3: opening a compressed air valve, adjusting the opening of the valve, enabling the reading of the gas pressure gauge to be stably kept as P set in the step 1, and recording a gas flow value F1;
Step 4: comparing the recorded F1 value with a preset nonstandard theoretical flow F Nonstandard , Management device ;
Step 5: if the F1 value is larger than F Nonstandard , Management device , reducing the aperture of the laser drilling;
Step 6: if the F1 value is equal to F Nonstandard , Management device , the aperture of the laser drilling is kept unchanged;
Step 7: if the F1 value is smaller than F Nonstandard , Management device , increasing the aperture of the laser drilling;
Step 8: and (5) ending.
The calibration process of the F Nonstandard , Management device is as follows:
Firstly, setting a value of a specific pressure P, recording an air flow value F1 corresponding to the specific pressure P, and defining nonstandard theoretical flow corresponding to the specific pressure P as F Nonstandard , Management device ;
Then, air flow test under standard working conditions is carried out on an air flow table, an air flow value F2 is recorded, the theoretical flow of the standard working conditions is defined as F Label (C) , Management device , and the formula is utilized: Deducing:
And finally repeating the steps for at least 3 times to obtain the average value of F Nonstandard , Management device .
Preferably, the airtight treatment includes the steps of:
firstly, installing a lower sealing plate;
sealing the sealing position of the flame tube and all the precise bolt holes;
Then sealing the sealing position of the lower sealing plate;
Installing an upper sealing plate;
and finally, sealing the sealing position of the upper sealing plate.
Preferably, the laser dust splashed on the base plate is cleaned before the airtight treatment in step S2.
The invention also provides a special tool used for the method for detecting the air flow rate of the inner ring air film hole of the flame tube on line, and the special tool comprises a plurality of equal-height blocks which are uniformly distributed in circumference, wherein a bottom plate is placed on the equal-height blocks, the inner ring of the flame tube is arranged on the bottom plate, and each equal-height block fixedly compresses the inner ring of the flame tube and the bottom plate from top to bottom through bolts, gaskets, pressing plates and nuts.
The number of contour blocks is preferably four.
In order to realize the on-line detection state, parts are added on the basis of the special tool, in particular to a lower sealing plate is arranged on a bottom plate, and then the whole formed by an air inlet pipe, an air flowmeter, a gas pressure gauge and an upper sealing plate is arranged above a flame tube.
Compared with the prior art, the invention has the following advantages:
1, the detection method provided by the invention fuses the perforation of the air film hole and the air flow test tool together, so that the whole processing period of the air film hole of the inner ring of the flame tube can be greatly compressed, and the processing efficiency is greatly improved.
2. Parts are not put down in a machine tool in the processing and testing processes, so that the quality hidden trouble caused by repeated clamping tool setting errors is eliminated.
3. Air flow detection can be performed at any number of rows, thereby creating a complete air flow database.
Drawings
FIG. 1 is a flow chart of a first detection;
Fig. 2 is a flow chart of non-first detection.
FIG. 3 is a schematic diagram of a dedicated tooling of the present invention in a laser drilling state;
FIG. 4 is a schematic diagram of an on-line detection state of a dedicated tooling of the present invention;
FIG. 5 is a schematic diagram of a gas seal;
In the drawings, the meaning of the reference numerals: 1, a flame tube inner ring; 2, a bolt; 3, a gasket; 4, pressing plates; 5, a contour block; 6, a nut; 7, a bottom plate; 8, an air inlet pipe; 9, an air flowmeter; 10, a gas pressure gauge; 11, an upper sealing plate; 12, a lower sealing plate; 13, an upper sealing plate sealing position; 14, flame tube sealing position; 15, sealing the sealing position of the lower sealing plate; 16, precision bolt holes.
Detailed Description
The invention will be further described in detail with reference to the drawings.
The invention aims to search an air flow test state required by non-product standards by providing a set of new algorithm, and the non-standard state is required to stably run and sensitively reflect the air flow condition, so that the air flow and the air inlet pressure in the non-standard state are monitored and detected, and related data are recorded. When the air flow test is performed for the first time, air flow detection required by the standard is performed on the same part, data are recorded, a conversion relation between non-standard and standard is calibrated, and when the air flow test is performed for the first time, air flow tests under various different air inlet pressures are performed, and the optimal parameters are selected, so that the air flow test is performed on line under the condition that non-standard conditions which are easy to meet replace standard working conditions with harsh conditions.
It is emphasized that the purpose of the invention is not to directly solve the problem of standard online air flow test of the flame tube air film hole, but to provide a reference basis for adjusting the aperture of the air film hole.
As shown in fig. 1 and 2, the present invention proposes a method for online detecting air flow of an inner ring air film hole of a flame tube, and a flow chart of the method is divided into a first detection flow chart and a non-first detection flow chart.
When the air flow value F1 corresponding to the specific pressure P is recorded for the first time, the nonstandard theoretical flow corresponding to the specific pressure P is defined as F Nonstandard , Management device , meanwhile, the air flow test under the standard working condition is carried out on the air flow table, the air flow value F2 is recorded, the theoretical flow defining the standard working condition is defined as F Label (C) , Management device , and the following formula is provided:
It can be deduced that:
After the value of F Nonstandard , Management device is detected and calibrated for the first time, the F1 value detected subsequently is compared with F Nonstandard , Management device , so that whether and how to adjust the aperture of the air film hole can be determined. F Nonstandard , Management device of single calibration has certain measurement errors, and can be calibrated for 3 times or more, and the average value is taken to reduce the measurement errors.
As shown in fig. 2, when the detection is not performed for the first time, the P value determined in fig. 1 can be directly used for online detection, after the value is stable, the F1 value is recorded, the F1 value is compared with the F Nonstandard , Management device obtained in fig. 1, and if the F1 value is large, the aperture of the subsequent laser drilling is reduced; if the aperture values are equal, the size before the aperture of the subsequent laser drilling is continued is not changed; if the F1 value is small, the aperture of the subsequent laser drilling is increased.
The flow shown in fig. 1 and 2 focuses on-line detection, and as a specific embodiment of the present invention, a method for on-line detecting air flow rate of an inner ring air film hole of a flame tube includes the following steps:
step 1: cleaning laser dust splashed on the bottom plate 7;
step 2: installing a lower sealing plate 12;
Step 3: sealing the flame tube sealing location 14 while containing all of the precision bolt holes 16;
step 4: sealing the lower sealing plate sealing position 15;
Step 5: installing an upper sealing plate 11;
Step 6: sealing the upper sealing plate sealing position 13;
step 7: and (3) opening a compressed air valve, adjusting the opening of the valve to enable the reading of the gas pressure gauge to be kept at P stably, and recording a gas flow value F1.
The special tool corresponding to the method for detecting the air flow rate of the inner ring air film hole of the flame tube on line is shown in fig. 3 and 4, wherein fig. 3 and 4 are the same set of tool, fig. 3 is a laser drilling state, and fig. 4 is an on-line detection state.
The frock of laser drilling state is total everywhere contour blocks 5, is circumference equipartition, and bottom plate 7 is placed on contour blocks 5, and flame tube inner ring 1 is placed on bottom plate 7, has bolt 2, gasket 3, clamp plate 4, nut 6 on every contour block to flame tube inner ring 1 and bottom plate 7 fixed compress tightly, and clamp plate 4 is located between gasket 3 and contour blocks 5, and bolt 2 passes gasket 3, clamp plate 4, contour blocks 5 and nut 6 from top to bottom in proper order.
The tool for detecting the state online is realized by adding accessories in the punching state, firstly, a lower sealing plate 12 is placed on a bottom plate 7, and then an integral formed by an air inlet pipe 8, an air flow meter 9, a gas pressure meter 10 and an upper sealing plate 11 is buckled above the flame tube.
When the laser processing gas film holes, namely punching, the corresponding parts with the reference numerals 8-12 are not installed, as shown in figure 3. After the air film holes are processed, corresponding parts 8-12 are arranged, and then air flow detection is carried out on line, as shown in fig. 4, and air tightness treatment is needed before the test, as shown in fig. 5.
The hermetic seal may be performed by sealing the locations of the corresponding parts 13-15 in fig. 5 using an insulating tape or other sealant, preferably sealing the locations 14, 15 in the figure from within the inner ring of the flame tube, taking care that all of the precision bolt holes 16 are wrapped when sealing the locations 14, and then sealing the locations 13 from the outside.
The above is a further detailed description of the invention in connection with specific preferred embodiments, and it is not to be construed as limiting the practice of the invention to these descriptions. It should be noted that modifications can be made by those skilled in the art without departing from the principles of the present invention, which modifications should also be considered as falling within the scope of the present invention.
Claims (6)
1. The method for detecting the air flow rate of the inner ring air film hole of the flame tube on line is characterized by comprising the following steps of:
S1: setting a value of a specific pressure P;
S2: hermetically treating;
S3: opening a compressed air valve, adjusting the opening of the valve, enabling the reading of the gas pressure gauge to be stably kept as P set in the step 1, and recording a gas flow value F1;
S4: comparing the recorded F1 value with a preset nonstandard theoretical flow F Nonstandard , Management device ;
S5: if the F1 value is larger than F Nonstandard , Management device , reducing the aperture of the laser drilling;
S6: if the F1 value is equal to F Nonstandard , Management device , the aperture of the laser drilling is kept unchanged;
S7: if the F1 value is smaller than F Nonstandard , Management device , increasing the aperture of the laser drilling;
s8: ending;
the calibration process of F Nonstandard , Management device is as follows:
S21: setting a value of a specific pressure P, recording an air flow value F1 corresponding to the specific pressure P, and defining nonstandard theoretical flow corresponding to the specific pressure P as F Nonstandard , Management device ;
S22: air flow test under standard working condition is carried out on an air flow table, an air flow value F2 is recorded, theoretical flow of the standard working condition is defined as F Label (C) , Management device , and the formula is utilized: Deducing:
s23: repeating the above steps for at least 3 times to obtain the average value of F Nonstandard , Management device .
2. The method for on-line detection of air flow rate of inner ring air film holes of a flame tube according to claim 1, characterized in that the airtight treatment comprises the following steps:
S31: installing a lower sealing plate;
s32: sealing the sealing position of the flame tube and all the precise bolt holes;
s33: sealing the sealing position of the lower sealing plate;
s34: installing an upper sealing plate;
s35: and sealing the sealing position of the upper sealing plate.
3. The method for on-line detection of air flow rate of inner ring air film holes of flame tube according to claim 1, wherein laser dust is cleaned before the airtight treatment in step S2.
4. The special tool for the method for detecting the air flow rate of the air film holes of the inner ring of the flame tube on line according to claim 1, wherein the special tool comprises a plurality of equal-height blocks which are uniformly distributed in the circumference during laser drilling operation, a bottom plate is placed on each equal-height block, the inner ring of the flame tube is arranged on the bottom plate, and each equal-height block fixedly presses the inner ring of the flame tube and the bottom plate from top to bottom through bolts, gaskets, pressing plates and nuts.
5. The tooling of claim 4, wherein the number of contour blocks is four.
6. The fixture for on-line detection according to claim 4, wherein a lower sealing plate is arranged on the bottom plate, and an integral body formed by the air inlet pipe, the air flow meter, the air pressure meter and the upper sealing plate is arranged above the flame tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842692.9A CN115106662B (en) | 2022-07-18 | 2022-07-18 | Method for online detection of air flow of inner ring air film hole of flame tube and special tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842692.9A CN115106662B (en) | 2022-07-18 | 2022-07-18 | Method for online detection of air flow of inner ring air film hole of flame tube and special tool |
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| Publication Number | Publication Date |
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| CN115106662A CN115106662A (en) | 2022-09-27 |
| CN115106662B true CN115106662B (en) | 2024-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210842692.9A Active CN115106662B (en) | 2022-07-18 | 2022-07-18 | Method for online detection of air flow of inner ring air film hole of flame tube and special tool |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117087A (en) * | 1989-08-15 | 1992-05-26 | Elliott Industries Limited | Method of producing an apertured component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4235789B2 (en) * | 2002-05-15 | 2009-03-11 | トヨタ自動車株式会社 | Fuel injection hole machining method and machining apparatus |
| JP5820602B2 (en) * | 2011-04-04 | 2015-11-24 | 本田技研工業株式会社 | Injection hole machining method for injector body |
| CN105312781A (en) * | 2014-12-08 | 2016-02-10 | 牛得草 | Method for detecting whether materials are penetrated or not by using change of gas pressure or flow |
| CN111975192A (en) * | 2019-05-05 | 2020-11-24 | 云南恩典科技产业发展有限公司 | Laser drilling online image detection system |
| CN113059277B (en) * | 2021-02-24 | 2022-11-04 | 星控激光科技(上海)有限公司 | Ultrafast laser processing method for special-shaped air film hole of aero-engine flame tube |
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- 2022-07-18 CN CN202210842692.9A patent/CN115106662B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117087A (en) * | 1989-08-15 | 1992-05-26 | Elliott Industries Limited | Method of producing an apertured component |
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