CN109489904A - A kind of detection system and method for the gas leakage of engine crankcase faying face - Google Patents
A kind of detection system and method for the gas leakage of engine crankcase faying face Download PDFInfo
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- CN109489904A CN109489904A CN201811354955.1A CN201811354955A CN109489904A CN 109489904 A CN109489904 A CN 109489904A CN 201811354955 A CN201811354955 A CN 201811354955A CN 109489904 A CN109489904 A CN 109489904A
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- temperature
- faying face
- temperature measurer
- gas leakage
- engine crankcase
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses the detection systems and method of a kind of engine crankcase faying face gas leakage, including temperature measurer and data acquisition display apparatus；Temperature measurer is fixed, and temperature measurer measurement range covers tested casing surface；The collected temperature data of temperature measurer is converted to thermal image and is shown by data acquisition display apparatus.Method includes that 1. use several temperature measurers, cover temperature measurer measurement range by tested casing surface, and engine is started to work, and is scanned tested casing installation side faying face；2. the temperature data that temperature measurer is detected is transmitted to data acquisition display apparatus；3. acquisition display shows thermography, according to different location thermography color difference, Gas leak position judgement is carried out, if in same color region, a part color and other site colors are inconsistent, this position is air leak position.For determined in bench test drive and line casing faying face whether gas leakage and air leak position, take specific aim control measure, improve engine use reliability.
Description
Technical field
The invention belongs to aeroengine test field, be related to a kind of engine crankcase faying face gas leakage detection system and
Method.
Background technique
With the development of science and technology to the design of aero-engine, manufacture and detection, more stringent requirements are proposed, to reach boat
Empty engine high-performance, the technical indicator of high reliability, engineering staff leak the non-design in casing class part therein installation side
Gas, which will cause engine overall performance deficiency problem, further insight.Aircraft engine crankcase component is not only stator group
Part provides installation site, while also to provide channel by the air-flow of working-blade.Its connection should be safe and reliable, while to subtract
Few air loss, the faying face of connection guarantee there is good leakproofness again.Once casing faying face gas leakage not only influences to start
Engine efficiency also can be impacted or be damaged to anti-icing system, accessory system, serious to will affect engine reliable work.
Regardless of in rack or line casing faying face leak check using artificial method be all can not be real
Existing, the difficult point of artificial detection has three, and since casing internal temperature is higher, (inlet duct, low-pressure compressor component remove one
Outside), minimum also at 150 DEG C or more, casing internal gas is once revealed, human body of easily burning；Secondly due to casing internal gas
Amount of leakage is limited, the engine big amount temperature of limited internal gas leakage rate and casing outside lower gas realization wink when operating
When mix, or since injection airflow function is instantaneously dispelled, gas leakage position is caused to be not easy to be found；Thirdly due to engine
Strong noise can be generated when test run, it is big to vibrate, do not allow people to enter test cell or close to engine in test run regulation for safety.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of engine crankcase faying face gas leakage is provided
Detection system and method, in bench test drive and line determine casing faying face whether gas leakage and air leak position, adopt
Specific aim control measure are taken, engine use reliability is improved.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of detection method of engine crankcase faying face gas leakage, includes the following steps,
Step 1, using several temperature measurers, cover temperature measurer measurement range by tested casing surface, engine starts work
Make, is scanned tested casing installation side faying face；
Step 2, temperature data temperature measurer detected is transmitted to data acquisition display apparatus；
Step 3, acquisition display shows thermography, according to different location thermography color difference, carries out Gas leak position
Judgement, if in same color region, a part color and other site colors are inconsistent, then this position be air leak position.
Preferably, in step 3, air leakage is judged according to the temperature difference at air leak position and remaining position, compared to same
The temperature difference at other positions is bigger in temperature region, then air leakage is bigger, then gap is bigger.
Preferably, it in step 1, is tested on the outside of casing periphery at least provided with three temperature measurers.
Preferably, in step 1, according to the imaging angle α and image-forming range of temperature measurer, determine temperature measurer installation number and
Mounting distance, the measurement range that all temperature measurers determine jointly can cover tested casing surface.
Further, in step 1, temperature measurer is mounted on magnetic fixed block, then magnetic fixed block is adsorbed
On fixed steelframe.
Preferably, the temperature measurer is non-hand-held infrared radiation thermometer.
A kind of detection system of engine crankcase faying face gas leakage, including temperature measurer and data acquisition display apparatus；
The temperature measurer fixed setting, temperature measurer measurement range cover tested casing surface；
Data acquisition display apparatus is used to that the collected temperature data of temperature measurer to be converted to thermal image and be shown.
Preferably, casing surrounding is tested to be symmetrically arranged there are four temperature measurer.
Preferably, temperature measurer is mounted on magnetic fixed block, and magnetic fixed block is adsorbed on fixed steelframe.
Preferably, the temperature measurer is non-hand-held infrared radiation thermometer.
Compared with prior art, the invention has the following advantages:
The present invention carries out temperature measurement, after engine operation, wall surface inside and outside casing to tested casing surface by temperature measurer
Temperature-difference is larger, sprays in air-leak section inner air, air-leak section temperature is caused to rise, and is transmitted to data acquisition according to temperature measurer
The different location thermography color difference of display, which is shown, may determine that Gas leak position, so that targetedly sealing control be taken to arrange
It applies, improves engine use reliability, the debugging suitable for the inspection before use and after leaking air.
Further, air leakage may determine that according to the actual temp value of air leak position, compared in same temperature region its
His temperature difference at position is bigger, then air leakage is bigger, then gap is bigger, is sealed control thus more targeted and arranges
It applies.
Further, it is tested casing diameter and has been symmetrically arranged 4 temperature measurers around, enable the temperature-measuring range of temperature measurer
The periphery for covering tested casing comprehensively avoids the occurrence of detection and omits.
Further, temperature measurer is mounted on magnetic fixed block, magnetic fixed block is then adsorbed on fixation
It is easy for assemble or unload on the suitable position of steelframe, and it is conveniently adjusted movement, guarantee that connection is reliable.
Detailed description of the invention
Fig. 1 is tested casing circumferential direction faying face air leakage detection system schematic diagram of the invention；
Fig. 2 is the axially combined face air leakage detection system schematic diagram of tested casing of the invention；
Fig. 3 is tested casing faying face gas leakage detecting step schematic diagram of the invention；
Fig. 4 is to be tested casing in the embodiment of the present invention one to install side faying face detection temperature anomaly schematic diagram；
Fig. 5 is to be tested casing in the embodiment of the present invention two to install side faying face detection temperature anomaly schematic diagram.
Wherein: 1a- is tested casing circumferentially installation side faying face；1b- is tested the axially mounted side faying face of casing；2- thermometric
Instrument；The magnetic fixed block of 3-；4- fixes steelframe；5- temperature anomaly position.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As depicted in figs. 1 and 2, temperature measurer 2 is mounted on magnetic fixed block 3, magnetic fixed block 3 is adsorbed on
On fixed steelframe 4, temperature measurer 2 is aligned at the installation side faying face of tested casing, the vertical planar survey sideline of temperature measurer 2 and tested machine
Casket periphery is tangent, and tested casing radial direction both ends have been symmetrically arranged temperature measurer 2, according to the measurement range of temperature measurer 2 and at
Image distance is from the temperature-measuring range of the installation number and mounting distance guarantee temperature measurer 2 that determine temperature measurer 2 can cover tested casing
Periphery, at least 3 temperature measurers 2 select 4 temperature measurers 2 in one box embodiment two of embodiment, in the periphery of tested casing
Surrounding is symmetrical arranged, and clear in structure to make in Fig. 1, upper and lower two temperature measurers 2, which are omitted, not to be drawn.
Detecting step is as shown in Figure 3:
1) the support bracket fastened installation of utilizes stand arrangement or the fixed steelframe 4 of outfield ground installation installation test equipment.
2) installation of test equipment, i.e. test equipment use non-hand-held infrared radiation thermometer, and temperature measurer 2 is mounted on band
On magnetic fixed block 3, then magnetic fixed block 3 is adsorbed on the suitable position of fixed steelframe 4, guarantees that connection can
It leans on.According to the imaging angle α and image-forming range of temperature measurer 2, the installation number and mounting distance of temperature measurer 2 are determined, guarantee thermometric
2 measurement range of instrument covers tested casing surface, and imaging angle α is bigger, and installation number is more, and mounting distance is remoter；Imaging away from
From remoter, installation number is fewer, and mounting distance is remoter.
3) is detected, i.e., tested casing surrounding makes 2 measurement range of temperature measurer by tested machine at least provided with 3 temperature measurers 2
In casket is wrapped in, engine is started to work, and is scanned tested casing installation side faying face.
4) when data acquisition, i.e. engine operation, wall surface temperature-difference is larger inside and outside casing, is transmitted to according to temperature measurer 2
The different location thermography color difference of data acquisition display apparatus, which is shown, may determine that Gas leak position, if in same color region certain
Site color and other site colors are inconsistent, then this position is air leak position, according to the temperature of air leak position and remaining position
Difference may determine that air leakage, and the temperature difference compared to other positions in same temperature region is bigger, then air leakage is bigger, then between
Gap is bigger.
Data acquisition display apparatus is placed in engine control room, and the probe of temperature measurer 2 passes through cable or optical cable for test data
It is transmitted to data collector and shows thermography.
5) test equipment is removed, i.e., engine stop works, and by test equipment, fixed steelframe 4 is one by one, safety removes.If
Test job is carried out in test bay, can also be fixed on test equipment between engine test on wall, is not required to dismantle.
6) data are analyzed, i.e., install side faying face Gas leak position and air leakage according to the tested casing of record, take and be directed to
The sealing control measure of property.
Embodiment one；
As shown in figure 4, circumferentially installing side faying face leakproofness using non-hand-held infrared radiation thermometer test casing.
1) non-hand-held infrared radiation thermometer model: FLUKE TIX580
(1) temperature-measuring range: -20~800 DEG C.
(2) heat sensitivity :≤0.05 DEG C
(3) temperature measurement accuracy: ± 2 DEG C
(4) focusing system: three kinds of focusing modes (multiple spot auto-focusing, laser ranging auto-focusing, manual focus).
(5) visual field: 32 DEG C 20 DEG C of X
(6) use temperature measurer quantity: 4.
2) high-pressure compressor casing circumferentially installs side faying face measurement data
Engine test revolving speed is 96.58%NHWhen, temperature at the faying face of side, edge are installed after detecting high-pressure compressor casing
Circumferencial direction averagely takes 120 test points, records each test point temperature value and is as follows:
Temperature measured value (DEG C) at the faying face of side is installed after high-pressure compressor casing
3) test result analysis
Temperature measured value from the faying face of side is installed after high-pressure compressor casing it can be seen that the actual measurement temperature of test point 71~79
Spending range is 472~477 DEG C, close with casing inner wall temperature；Remaining test point temperature range is 134~152 DEG C, with casing
Outside wall surface temperature is suitable.Illustrate that nearby there are faying face gas leak phenomenons for 71~79 position of test point.
After engine test, overhaul is carried out, when decomposing to high-pressure compressor casing, using clearance gauge to installing after casing
Side faying face carries out clearance measurement, finds temperature anomaly position 5, i.e. circumferential location gap where test point 71~79 is bigger than normal,
Its value is 1.02~1.30mm (it is required that for ≯ 0.50mm).
Embodiment two；
As shown in figure 5, testing the axially mounted side faying face leakproofness of casing using non-hand-held infrared radiation thermometer.
1) non-hand-held infrared radiation thermometer model and parameter are the same as example 1.
2) the axially mounted side faying face measurement data of high-pressure compressor casing
Engine test revolving speed is 95.38%NHWhen, temperature at the axially mounted side faying face of high-pressure compressor casing is detected,
60 test points are averagely taken along axial direction, are recorded each test point temperature value and are as follows:
Temperature measured value (DEG C) at the axially mounted side faying face of high-pressure compressor casing
| Serial number | Temperature | Serial number | Temperature | Serial number | Temperature | Serial number | Temperature | Serial number | Temperature | Serial number | Temperature |
| 1 | 135 | 11 | 140 | 21 | 137 | 31 | 136 | 41 | 375 | 51 | 142 |
| 2 | 135 | 12 | 133 | 22 | 137 | 32 | 136 | 42 | 378 | 52 | 140 |
| 3 | 138 | 13 | 135 | 23 | 135 | 33 | 356 | 43 | 380 | 53 | 145 |
| 4 | 136 | 14 | 139 | 24 | 136 | 34 | 356 | 44 | 382 | 54 | 142 |
| 5 | 138 | 15 | 139 | 25 | 140 | 35 | 360 | 45 | 384 | 55 | 148 |
| 6 | 142 | 16 | 138 | 26 | 142 | 36 | 362 | 46 | 392 | 56 | 147 |
| 7 | 142 | 17 | 141 | 27 | 148 | 37 | 368 | 47 | 395 | 57 | 145 |
| 8 | 139 | 18 | 143 | 28 | 150 | 38 | 370 | 48 | 396 | 58 | 148 |
| 9 | 139 | 19 | 145 | 29 | 148 | 39 | 373 | 49 | 398 | 59 | 148 |
| 10 | 144 | 20 | 145 | 30 | 145 | 40 | 373 | 50 | 398 | 60 | 149 |
3) test result analysis
From temperature measured value from the axially mounted side faying face of high-pressure compressor casing it can be seen that test point 33~50 is surveyed
Temperature range is 365~398 DEG C, close with casing inner wall temperature；Remaining test point temperature range is 135~150 DEG C, with machine
Casket outside wall surface temperature is suitable.Illustrate that nearby there are faying face gas leak phenomenons for 33~50 position of test point.
After engine test, overhaul is carried out, when decomposing to high-pressure compressor casing, casing is axially pacified using clearance gauge
Rim faying face carries out clearance measurement, it is found that temperature anomaly position 5, i.e. circumferential location gap where test point 33~50 are inclined
Greatly, value is 0.89~1.05mm (it is required that for ≯ 0.30mm).
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of detection method of engine crankcase faying face gas leakage, which is characterized in that include the following steps,
Step 1, using several temperature measurers (2), cover temperature measurer (2) measurement range by tested casing surface, engine starts
Work is scanned tested casing installation side faying face；
Step 2, the temperature data that temperature measurer (2) detects is transmitted to data acquisition display apparatus；
Step 3, acquisition display shows thermography, according to different location thermography color difference, carries out sentencing for Gas leak position
Disconnected, if in same color region, a part color and other site colors are inconsistent, then this position is air leak position.
2. a kind of detection method of engine crankcase faying face gas leakage according to claim 1, which is characterized in that step 3
In, air leakage is judged according to the temperature difference at air leak position and remaining position, compared to other positions in same temperature region
Temperature difference is bigger, then air leakage is bigger, then gap is bigger.
3. a kind of detection method of engine crankcase faying face gas leakage according to claim 1, which is characterized in that step 1
In, it is tested on the outside of casing periphery at least provided with three temperature measurers (2).
4. a kind of detection method of engine crankcase faying face gas leakage according to claim 1, which is characterized in that step 1
In, it according to the imaging angle α and image-forming range of temperature measurer (2), determines the installation number and mounting distance of temperature measurer (2), owns
The measurement range that temperature measurer (2) determines jointly can cover tested casing surface.
5. a kind of detection method of engine crankcase faying face gas leakage according to claim 4, which is characterized in that step 1
In, temperature measurer (2) is mounted on magnetic fixed block (3), then magnetic fixed block (3) is adsorbed on fixed steelframe
(4) on.
6. a kind of detection method of engine crankcase faying face gas leakage according to claim 1, which is characterized in that the survey
Wen Yi (2) is non-hand-held infrared radiation thermometer.
7. a kind of detection system of engine crankcase faying face gas leakage, which is characterized in that aobvious including temperature measurer (2) and data acquisition
Show device；
Temperature measurer (2) fixed setting, temperature measurer (2) measurement range cover tested casing surface；
Data acquisition display apparatus is used to that temperature measurer (2) collected temperature data to be converted to thermal image and be shown.
8. a kind of detection system of engine crankcase faying face gas leakage according to claim 7, which is characterized in that tested machine
Casket surrounding is symmetrically arranged there are four temperature measurer (2).
9. a kind of detection system of engine crankcase faying face gas leakage according to claim 7, which is characterized in that temperature measurer
(2) it is mounted on magnetic fixed block (3), magnetic fixed block (3) is adsorbed on fixed steelframe (4).
10. a kind of detection system of engine crankcase faying face gas leakage according to claim 7, which is characterized in that described
Temperature measurer (2) is non-hand-held infrared radiation thermometer.
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| CN201811354955.1A CN109489904A (en) | 2018-11-14 | 2018-11-14 | A kind of detection system and method for the gas leakage of engine crankcase faying face |
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| CN201811354955.1A CN109489904A (en) | 2018-11-14 | 2018-11-14 | A kind of detection system and method for the gas leakage of engine crankcase faying face |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461895A (en) * | 2020-12-18 | 2021-03-09 | 青岛森麒麟轮胎股份有限公司 | Thermal imaging detection system and method for aircraft tire through damage |
| CN113029455A (en) * | 2021-02-23 | 2021-06-25 | 北京星际荣耀空间科技股份有限公司 | Measuring system for leakage rate of aeroengine installation edge |
| CN113237600A (en) * | 2021-05-14 | 2021-08-10 | 山东瑞烨法兰有限公司 | Method for monitoring sealing performance of furnace door of heat treatment furnace |
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| CN106092446A (en) * | 2016-07-29 | 2016-11-09 | 大连理工大学 | Valve leak detecting system based on infrared thermal imaging technique and method |
| CN107121238A (en) * | 2017-05-12 | 2017-09-01 | 上海电力学院 | A kind of eminence gas leak detection method for hot-gas channel |
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- 2018-11-14 CN CN201811354955.1A patent/CN109489904A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092446A (en) * | 2016-07-29 | 2016-11-09 | 大连理工大学 | Valve leak detecting system based on infrared thermal imaging technique and method |
| CN107121238A (en) * | 2017-05-12 | 2017-09-01 | 上海电力学院 | A kind of eminence gas leak detection method for hot-gas channel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461895A (en) * | 2020-12-18 | 2021-03-09 | 青岛森麒麟轮胎股份有限公司 | Thermal imaging detection system and method for aircraft tire through damage |
| CN113029455A (en) * | 2021-02-23 | 2021-06-25 | 北京星际荣耀空间科技股份有限公司 | Measuring system for leakage rate of aeroengine installation edge |
| CN113237600A (en) * | 2021-05-14 | 2021-08-10 | 山东瑞烨法兰有限公司 | Method for monitoring sealing performance of furnace door of heat treatment furnace |
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Application publication date: 20190319 |