CN104359981A - Device and method for ultrasonic testing of engine fuel oil header pipe soldered joints - Google Patents
Device and method for ultrasonic testing of engine fuel oil header pipe soldered joints Download PDFInfo
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- CN104359981A CN104359981A CN201410594173.0A CN201410594173A CN104359981A CN 104359981 A CN104359981 A CN 104359981A CN 201410594173 A CN201410594173 A CN 201410594173A CN 104359981 A CN104359981 A CN 104359981A
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- probe
- engine fuel
- supersonic reflectoscope
- house steward
- ultrasonic detection
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Abstract
The invention discloses a device and method for ultrasonic testing of engine fuel oil header pipe soldered joints. The method is capable of effectively finding out the soldering defects in the fuel oil header pipe soldered joints and can be used for the ultrasonic testing of aerial engine fuel oil header pipe soldered joints. As the fuel oil header pipe soldered parts are complicated in shape and large in testing surface curvature (the pipe diameter is 6-16mm), so that when a conventional probe and a conventional coupling manner are used, the sound waves are difficult to be transmitted to the soldered parts due to the influence of the probe size and then testing cannot be carried out. According to the device and the method, a high-frequency high-resolution instrument and a high-frequency high-damp probe are used and a conical water jacket spray coupling manner is used, so that the ultrasonic waves emitted by the probe can be effectively converged to the surfaces of the pipes and irradiate into the soldered parts; therefore, if the soldered parts have defects, the defect signals can be easily recognized through observing the waveforms.
Description
Technical field
The invention belongs to aero engine technology field, be specifically related to a kind of engine fuel house steward soldered fitting ultrasonic detection device and method.
Background technology
Fuel manifold belongs to the core component of engine, and each fuel oil is in charge of and is assembled into house steward by soldering, and the welding quality of its brazed portions has a strong impact on the quality of engine, therefore just particularly important to the Dynamic Non-Destruction Measurement of brazed portions.
The quality of the regulation employing X ray detection soldered fitting in design drawing with fuel manifold is in charge of by fuel oil.But because following reason causes the method for ray detection to be insecure:
1) small―gap suture weld seam in conjunction with bad.The discernible minimum feature dimensions of current microradiography X is 0.1mm.Also be difficult to find even if the gap being less than this size exists ray detection.
2) joint of interference fit.Due to joint interference fit, cause ray there is no energy variation penetrating in distance, and can not defect be found.
3) problem of the fuzzy black line in ray detection.
Several defect defect that can identify in Ultrasonic Detection just above.
Though the method for Ultrasonic Detection is good, but due to reasons such as joint design are complicated, wall thickness is thin, brings difficulty to the enforcement of Ultrasonic Detection, need to have breakthrough technically.At present, domestic and international patent and paper database, do not detect the related data of aircraft engine fuel manifold brazing quality ultrasound examination.
Summary of the invention
The object of the invention is to solve above-mentioned problems of the prior art, a kind of engine fuel house steward soldered fitting ultrasonic detection device and method are provided, utilize the weld defects that the method can effectively find in fuel manifold Welding joint; For aircraft engine fuel manifold soldered fitting ultrasonic detection method.
To achieve these goals, the technical solution adopted in the present invention comprises the following steps:
A kind of engine fuel house steward soldered fitting ultrasonic detection device, comprises supersonic reflectoscope, and is connected to the probe on supersonic reflectoscope by concentric cable line; Probe is set with taper water jacket, taper water jacket is connected with water pump, fuel manifold to be detected is placed in the top of tank, and the water inlet pipe of water pump is placed in tank, and rising pipe is connected on taper water jacket.
Described supersonic reflectoscope employing model is high frequency, the high resolution type supersonic reflectoscope of NOVASCOPE 5000.
Described probe employing model is E11877, frequency is the point focusing probe of 25MHz.
With the tapered water jacket for realizing water spray focus detection on described probe.
A kind of engine fuel house steward soldered fitting ultrasonic detection method, comprises the following steps:
1) supersonic reflectoscope, probe and water injector are connected;
2) probe is placed on zero defect place, fuel manifold welding position, regulates scope and the gain of supersonic reflectoscope, make nozzle inner wall reflected signal can occur clearly reflecting at the bottom of five times of at least inwall on supersonic reflectoscope;
3) keep the detected parameters of supersonic reflectoscope constant, probe is placed on detected fuel manifold welding position and observes oscillogram, if the distance between adjacent two subwaves is greater than step 2) in adjacent two subwaves between distance, illustrate that welding position welding quality is good, then detect end; If the distance between adjacent two subwaves and step 2) in adjacent two subwaves between distance identical, tested position poor welding quality is described, then carry out step 4);
4) position of welding quality difference marks, and the position of welding quality difference processes again.
Described step 1) in, supersonic reflectoscope employing model is high frequency, the high resolution type supersonic reflectoscope of NOVASCOPE 5000.
Described step 1) in, probe employing model is E11877, frequency is the point focusing probe of 25MHz.
Described step 1) in, water injector comprises water pump and is sleeved on probe for realizing the tapered water jacket of water spray focus detection; The below of fuel manifold is provided with tank, and the water inlet pipe of water pump is placed in tank, and rising pipe is connected on taper water jacket.
Described step 3) in, the distance between adjacent two subwaves comprises the wall thickness of adapter and the wall thickness of fuel pipe.
Compared with prior art, the present invention has following beneficial effect:
Because fuel manifold pricker welding position is complex-shaped, detection faces curvature large (pipe diameter is 6-16mm), when adopting conventional transducer and conventional coupling scheme, because probe size affects, make sound wave not easily be transferred to welding position, thus cannot detect.And the present invention adopts high frequency, high-resolution instrument and high frequency, high damping probe, adopt taper water jacket water spray coupling scheme, the ultrasound wave launched from probe can be effectively made to converge to tube surfaces, thus incide welding position, as welding position existing defects, to, by observing waveform, just be easy to tell flaw indication.
Accompanying drawing explanation
Fig. 1 is the annexation schematic diagram of ultrasonic detection device of the present invention;
Fig. 2 is that welding position of the present invention detects schematic diagram;
Fig. 3 is that fuel manifold of the present invention detects position schematic diagram;
Fig. 4 is the mode chart that the present invention detects intact welding position;
Fig. 5 is the mode chart that the present invention detects defect welding position.
Wherein, 1 is supersonic reflectoscope; 2 is concentric cable line; 3 is tank; 4 is water pump; 5 is water inlet pipe; 6 is rising pipe; 7 is probe; 8 is tapered water jacket.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail:
See Fig. 1, the present invention is the method adopting above-mentioned ultrasonic detection method to detect the welding quality of certain engine fuel house steward brazed portions.Adopt said method to carry out ultrasonic wall thickness detection according to part to its position to be checked to illustrate, concrete the present invention includes following steps:
1) supersonic reflectoscope 1, probe 7 and water injector are connected; Supersonic reflectoscope 1 adopts model to be high frequency, the high resolution type supersonic reflectoscope of NOVASCOPE 5000.Probe 7 employing model is E11877, frequency is the point focusing probe of 25MHz.Probe 7 is connected on supersonic reflectoscope 1 by concentric cable line 2; Water injector comprises water pump 4 and is sleeved on probe 7 for realizing the tapered water jacket 8 of water spray focus detection; The below of fuel manifold is provided with tank 3, and the water inlet pipe 5 of water pump 4 is placed in tank 3, and rising pipe 6 is connected on taper water jacket 8.
2) probe 7 is placed on zero defect place, fuel manifold welding position, regulates scope and the gain of supersonic reflectoscope 1, make nozzle inner wall reflected signal can occur clearly reflecting at the bottom of five times of at least inwall on supersonic reflectoscope;
3) keep the detected parameters of supersonic reflectoscope 1 constant, probe 7 is placed on detected fuel manifold welding position and observes oscillogram, if the distance between adjacent two subwaves is greater than step 2) in adjacent two subwaves between distance, illustrate that welding position welding quality is good, then detect end; If the distance between adjacent two subwaves and step 2) in adjacent two subwaves between distance identical, tested position poor welding quality is described, then carry out step 4); Wherein, the distance between adjacent two subwaves is the wall thickness of adapter and the wall thickness of fuel pipe.
4) position of welding quality difference marks, and the position of welding quality difference processes again.
Principle of the present invention
1. the selection of detection mode
Because the diameter of pipe adapter and adapter is 6 ~ 18mm, and whole house steward's out-of-shape, in order to ensure the effect be coupled, ensuring enough acoustic energy and being transmitted into part, be therefore merely able to select water logging mode in local to detect, adopt water spray coupling scheme.
2. the selection of probe
The selection principle of probe the defect in solder joint well should be able to be identified, therefore probe should have good resolution.And high frequency, high damping probe can meet high-resolution requirement just.Therefore should consider to use high frequency, high damping probe in the selection of probe, effect determines that probe used is the point focusing probe E11877 of frequency 25MHz by experiment, adopts this probe and with tapered water jacket, conveniently can realize focus detection of spraying water.
3. the selection of supersonic reflectoscope
According to the probe selected, the present invention needs to select high frequency, high resolution type supersonic reflectoscope and probe to match.Effect determination instrument is NOVASCOPE 5000 by experiment.
4. fuel manifold ultrasound examination technique
Fuel manifold Welding position is that the different stainless pipe of diameter inserts adapter and welds, if welding position quality is good, then acoustic energy needs the wall thickness penetrating two pipes, if welding position poor quality, namely between welding position two pipe, there is air layer, then acoustic energy can only penetrate the wall thickness of outer pipe.Because the difference of acoustic propagation distance in two kinds of situations, waveform display just can distinguish good Yu the bad situation of bonding quality, reach the object of solder joint quality control.If adapter end ripple obviously moves forward, then tested position poor welding quality is described.If adapter end ripple does not move forward, then illustrate that welding position welding quality is good.
5. testing result comparative analysis
The present invention adopts ultrasound checking to 19 fuel manifold testpieces, and 18 qualified; As shown in Figures 4 and 5,1 (No. 3 parts) finds that there is obvious flaw indication at marginal position.
6. experiment conclusion
Prove through dissection and analysis and checking, the solder joint of fuel manifold adopt high frequency, high-resolution instrument and high frequency high damping to pop one's head in and spray water to carry out ultrasonic detection method be reliable to coupling scheme, the requirement of fuel manifold brazing quality can be ensured.In addition, the present invention extends to the detection of brazing quality of detection architecture complexity, the large part of detection faces curvature.
Above content is only and technological thought of the present invention is described; protection scope of the present invention can not be limited with this; every technological thought proposed according to the present invention, any change that technical scheme basis is done, within the protection domain all falling into claims of the present invention.
Claims (9)
1. an engine fuel house steward soldered fitting ultrasonic detection device, it is characterized in that: comprise supersonic reflectoscope (1), and be connected to the probe (7) on supersonic reflectoscope (1) by concentric cable line (2); Probe (7) is set with taper water jacket (8), taper water jacket (8) is connected with water pump (4), fuel manifold to be detected is placed in the top of tank (3), the water inlet pipe (5) of water pump (4) is placed in tank (3), and rising pipe (6) is connected on taper water jacket (8).
2. engine fuel house steward soldered fitting ultrasonic detection device according to claim 1, is characterized in that: described supersonic reflectoscope (1) employing model is high frequency, the high resolution type supersonic reflectoscope of NOVASCOPE 5000.
3. engine fuel house steward soldered fitting ultrasonic detection device according to claim 1 and 2, is characterized in that: described probe (7) employing model is E11877, frequency is the point focusing probe of 25MHz.
4. engine fuel house steward soldered fitting ultrasonic detection device according to claim 3, is characterized in that: with the tapered water jacket for realizing water spray focus detection on described probe (7).
5. an engine fuel house steward soldered fitting ultrasonic detection method, is characterized in that, comprise the following steps:
1) supersonic reflectoscope (1), probe (7) and water injector are connected;
2) will pop one's head in (7) be placed on zero defect place, fuel manifold welding position, regulate scope and the gain of supersonic reflectoscope (1), make nozzle inner wall reflected signal can occur clearly reflecting at the bottom of five times of at least inwall on supersonic reflectoscope;
3) keep the detected parameters of supersonic reflectoscope (1) constant, pop one's head in (7) are placed on detected fuel manifold welding position and observe oscillogram, if the distance between adjacent two subwaves is greater than step 2) in adjacent two subwaves between distance, illustrate that welding position welding quality is good, then detect end; If the distance between adjacent two subwaves and step 2) in adjacent two subwaves between distance identical, tested position poor welding quality is described, then carry out step 4);
4) position of welding quality difference marks, and the position of welding quality difference processes again.
6. engine fuel house steward soldered fitting ultrasonic detection method according to claim 5, it is characterized in that: described step 1) in, supersonic reflectoscope (1) employing model is high frequency, the high resolution type supersonic reflectoscope of NOVASCOPE 5000.
7. the engine fuel house steward soldered fitting ultrasonic detection method according to claim 5 or 6, is characterized in that: described step 1) in, probe (7) employing model is E11877, frequency is the point focusing probe of 25MHz.
8. engine fuel house steward soldered fitting ultrasonic detection method according to claim 5, it is characterized in that: described step 1) in, water injector comprises water pump (4) and is sleeved on probe (7) for realizing the tapered water jacket (8) of water spray focus detection; The below of fuel manifold is provided with tank (3), and the water inlet pipe (5) of water pump (4) is placed in tank (3), and rising pipe (6) is connected on taper water jacket (8).
9. the engine fuel house steward soldered fitting ultrasonic detection method according to claim 5 or 6 or 8, is characterized in that: described step 3) in, the distance between adjacent two subwaves comprises the wall thickness of adapter and the wall thickness of fuel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410594173.0A CN104359981A (en) | 2014-10-29 | 2014-10-29 | Device and method for ultrasonic testing of engine fuel oil header pipe soldered joints |
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| CN201410594173.0A CN104359981A (en) | 2014-10-29 | 2014-10-29 | Device and method for ultrasonic testing of engine fuel oil header pipe soldered joints |
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| CN201410594173.0A Pending CN104359981A (en) | 2014-10-29 | 2014-10-29 | Device and method for ultrasonic testing of engine fuel oil header pipe soldered joints |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792869A (en) * | 2015-04-03 | 2015-07-22 | 上海和伍新材料科技有限公司 | Ultrasonic non-destructive testing system for brazing quality of electrical contact of low-voltage electrical apparatus |
| CN109507295A (en) * | 2018-11-30 | 2019-03-22 | 中国兵器工业第五九研究所 | A kind of lossless detection method of radial direction friction welding connector Weak link defect |
-
2014
- 2014-10-29 CN CN201410594173.0A patent/CN104359981A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792869A (en) * | 2015-04-03 | 2015-07-22 | 上海和伍新材料科技有限公司 | Ultrasonic non-destructive testing system for brazing quality of electrical contact of low-voltage electrical apparatus |
| CN104792869B (en) * | 2015-04-03 | 2018-01-05 | 上海和伍精密仪器股份有限公司 | The Ultrasonic Nondestructive system of low-voltage electrical apparatus electrical contact brazing quality |
| CN109507295A (en) * | 2018-11-30 | 2019-03-22 | 中国兵器工业第五九研究所 | A kind of lossless detection method of radial direction friction welding connector Weak link defect |
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Application publication date: 20150218 |