CN103293002A - Cartridge containment experiment method based on linear cumulative cutting - Google Patents
Cartridge containment experiment method based on linear cumulative cutting Download PDFInfo
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- CN103293002A CN103293002A CN2013102170411A CN201310217041A CN103293002A CN 103293002 A CN103293002 A CN 103293002A CN 2013102170411 A CN2013102170411 A CN 2013102170411A CN 201310217041 A CN201310217041 A CN 201310217041A CN 103293002 A CN103293002 A CN 103293002A
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Abstract
The invention discloses a cartridge containment experiment method based on linear cumulative cutting. Linear cumulative cutting and wireless initiation are used to allow fan impeller vane fly balls to impact a cartridge at a preset rotation speed so as to complete the fan-scale cartridge containment experiment of aero engines. The method is simple, reliable and accurate in rotation speed control, and precision of containment experiments is increased.
Description
Technical field
The present invention relates to a kind of line style cumulative cutting technique, relate in particular to a kind of casing based on line style cumulative cutting technique and contain test method.
Background technology
Development along with aeronautical technology, the thrust-weight ratio of aeromotor improves constantly, and the rotating speed of the rotor of engine rotor is also more and more higher, because engine blade turns round in bad working environments for a long time, therefore causing fatigue break is inevitably, and disconnected leaf is great threat to the aircraft of high-altitude flight.If casing is breakdown, the fragment of high speed high energy will break aircraft cabin, fuel tank, control circuit etc. finally may cause fatal crass's accident, so the big state of each aviation are all made strict regulations to the casing pardon in the aeromotor standard.In order to obtain the seaworthiness licence of corresponding aviation management department, need be on special high speed spinner, get the one-level fan and make blade at a certain desired speed from the root containing ability of bump casing with the test casing that fly to have no progeny.In order to make blade fly to break, way is the crackle of prefabricated certain depth on blade usually, makes blade to fly to break in the desired speed scope.
The line style beehive-shaped charge is a kind of form of beehive-shaped charge, after the flexible linear-shaped charge blast, detonation product acts on the metal drug-shaped cover with great pressure, make it that high velocity impact take place in symmetrical plane, the drug-shaped cover inwall is extruded one to the blade-like metal jet of powder charging bottom high-speed motion, is enough to steel plate is played the erosion cutting action.Current line style cumulative cutting is mainly used in military field or the aspects such as directional dismantling of buildings.
Because the error of calculation and mismachining tolerance, it is disconnected bigger for the departure of rotating speed that precrack flies blade, therefore is necessary to work out to control blade more accurately and fly disconnected method.According to publishing document, offshore company once utilized the mode that presets explosive at root of blade to realize that blade flying under desired speed break, but was that fragmentary character property is described, and did not see its specific implementation method, can not use by oneself.
Summary of the invention
For the blade that is implemented under the desired speed more accurately flies to break, the casing that carries out that line style cumulative cutting technique is incorporated into of the invention contains in the test, proposes a kind of casing containing test method based on line style cumulative cutting technique.
Concrete technical scheme of the present invention is: based on the containing test method of line style cumulative cutting technique.Specifically comprise following steps:
1) design of special-purpose linear cavity effect cutter.The linear cavity effect cutter of current application all is based on the cutting task and designs specially for the structural parameters of cutter, explosive load etc., to guarantee having enough cutting powers.Because there is certain crooked radian in blade, therefore need linear cavity effect cutter to the adaptability of curve form.At above-mentioned factor, utilize nonlinear kinetics software for calculation LS-DYNA linear cavity effect cutter jet forming process and the erosion process of curved surface target plate is carried out numerical simulation, design linear cavity effect cutter strong to current cutting task adaptability, economical rationality;
2) linear cavity effect cutter that step 1) is obtained is fixed in the fan blade root, intends adopting screw to fix and verify the reliability of screw under the high speed rotation status;
3) completing steps 2) after, with the blade that the linear cavity effect cutter symmetry is installed counterbalance weight is being set, and is finishing the transient equilibrium of band frock blast fan at dynamic balance instrument;
4) blast fan that step 3) is obtained is installed on the flexible shaft of high speed spinner clutch end, and the corresponding lead-in wire that connects wireless initiator receiving end, and wireless initiator receiving end is mounted on axis part;
5) will simulate casing and use bolt in the test cavity, even with the gap between the coaxial placement of blast fan and assurance and the blade tip, be pasted with foil gauge on the simulation casing, be connected to dynamic strain indicator by lead-in wire;
6) the good high speed camera of Installation and Debugging, dynamic strain indicator and high-speed data acquisition oscillograph, and wireless initiator signal transmitting terminal signal lead in the step 4) is connected to the oscillographic trigger end of high speed camera, dynamic strain indicator and high-speed data acquisition, utilize blast signal as the trigger pip of data acquisition synchronously;
7) each system performance debugging finishes, the related personnel retreats to beyond the safe distance, start the high speed spinner, treat that rotating speed rises to predetermined fly disconnected rotating speed and maintenance, send time break and ignite linear cavity effect cutter, finish the cutting to impeller vane, and trigger high speed camera, dynamic strain indicator and high-speed data acquisition oscillograph synchronously, finish collection of experiment data.
The invention has the beneficial effects as follows:
1, makes that fan level casing containing test is more accurate for the control that blade flies disconnected rotating speed, improved the accuracy of test findings greatly;
2, improved the triggering system of original employing.Directly the time break with wireless initiator triggers high-speed camera, dynamic strain indicator and high-speed data acquisition oscillograph, no longer needs coil to trigger or the vibratory output triggering, has simplified test unit;
3, device is simple, and the operational reliability height has been expanded the range of application of linear cavity effect cutter.
Description of drawings
Fig. 1 is for adapting to the special-purpose linear cavity effect cutter schematic cross-section of cutting task design;
Fig. 2 is the structural representation sketch based on the containing pilot system of line style cumulative cutting technique.
Among Fig. 1: linear cavity effect cutter shell 1, high explosive 2, drug-shaped cover 3;
Among Fig. 2: high-speed camera 4,1000W high strength direct current lamp 5, lens 6, wireless time break receiver 7, linear cavity effect cutter 8, fan blade 9, casing 10, flexible shaft 11, high speed spinner cavity 12, test cavity 13.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples, it is more obvious that purpose of the present invention and effect will become.
Fig. 1 is for adapting to the special-purpose linear cavity effect cutter schematic cross-section of cutting task design;
Fig. 2 is the structural representation sketch based on the containing pilot system of line style cumulative cutting technique.
As shown, the containing test method based on line style cumulative cutting technique comprises following steps:
Step 1: the design of special-purpose linear cavity effect cutter.The linear cavity effect cutter of current application all is based on the cutting task and designs specially for the structural parameters of cutter, explosive load etc., to guarantee having enough cutting powers.Because there is certain crooked radian in blade, therefore need linear cavity effect cutter to the adaptability of curve form.At above-mentioned factor, utilize the nonlinear kinetics software for calculation LS-DYNA of LSTC/ANSYS company to adopt
Liu Hongli, Xu Lixin, Zhang Guowei: the numerical simulation [J] that line style beehive-shaped charge jet forms. mechanical ﹠ electrical technology, 2010,
33(3): 28-30.
And
Shi Dangyong etc.: carry out explicit dynamic analysis [M] based on ANSYS/LS-DYNA8.1. Beijing: publishing house of Tsing-Hua University, 2005.The FEM (finite element) calculation scheme that proposes is carried out numerical simulation to linear cavity effect cutter jet forming process and to the erosion process of curved surface target plate, according to
Yang Li, Zhou Xiang, Gu Yuebing, Liu Haoquan: the experimental study [J] of linear shaped cutter cuts steel plate. engineering explosion, 2003.
9(2): 19-21.
And
Shi Yiding: small-sized linear cavity effect cutter parameter study and design [D]. Institutes Of Technology Of Nanjing, 2006.In to the method for linear cavity effect cutter cutting steel plate research experiment, the difference that needs to consider the target plate material simultaneously (is carbon steel described in the document, the blast fan material is titanium alloy) on the empirical parameter basis, calculate for the explosive load of thickness, material and the cutter of drug-shaped cover, cross section parameter etc., design linear cavity effect cutter strong to current cutting task adaptability, economical rationality.Fig. 1 has provided the schematic cross-section of linear cavity effect cutter;
Step 2: the linear cavity effect cutter that step 1 is obtained is fixed in the fan blade root, intends adopting screw to fix and verify the reliability of screw under the high speed rotation status.Generally speaking, the linear cavity effect cutter that is applied to the directional dismantling aspect is fixing all fairly simple, containing test based on line style cumulative cutting technique is in very high rotating speed owing to blast fan, therefore the clamping for cutter has fixedly proposed very strict requirement, must guarantee can not come off under high speed rotation situation.The present invention takes screw to fix, and verifies the reliability of screw under desired speed in advance;
Step 3: behind completing steps 2, with the blade that the linear cavity effect cutter symmetry is housed counterbalance weight is being set, and is finishing the transient equilibrium of band frock blast fan at dynamic balance instrument;
Step 4: the blast fan that reaches certain dynamic balance accuracy that step 3 is obtained is installed on the flexible shaft 11 of high speed spinner clutch end, and the corresponding lead-in wire that connects wireless initiator receiving end, wireless initiator receiving end 7 is mounted on flexible shaft 11 axis parts.Wireless initiator in blasting engineering is used application case seldom, but the present invention can't utilize conventional lead-in wire fired charge, can only pass through wireless initiator.The wireless transmitting terminal that detonates places in the high speed spinner test cavity 13 (synoptic diagram does not mark), then trigger switch is connected to the pulpit, reduces closed container to the influence of wireless signal;
Step 5: will be pasted with the cylindrical shape simulation casing 10 usefulness bolt of foil gauge in the test cavity, even with the gap between the coaxial placement of blast fan and assurance and the blade tip, be pasted with foil gauge on the simulation casing 10, be connected to dynamic strain indicator by lead-in wire, strained situation when being subjected to temporary impact in order to measure casing is for casing design provides reference data;
Step 6: high speed camera (shooting speed need reach more than the 10000fps) hung be fixed in directly over the high speed spinner, and see through bullet proof glass and take test cavity.Place concavees lens 6 on the bullet proof glass and take the visual angle in order to enlarge; Two eddy current displacement sensors (not marking among the figure) that are built in high speed spinner inside, become 90 degree to be placed in the flexible shaft lower end are connected to the high-speed data acquisition oscillograph by lead-in wire, in order to measure the vibration data that blade flies disconnected moment flexible shaft.Wireless initiator signal transmitting terminal signal lead in the step 4 is connected to the oscillographic trigger end of high speed camera, dynamic strain indicator and high-speed data acquisition, utilizes blast signal as the trigger pip of data acquisition synchronously;
Step 7: each system performance debugging finishes, the related personnel retreats to beyond the safe distance, start the high speed spinner, treat that rotating speed rises to predetermined fly disconnected rotating speed and maintenance, send time break and ignite linear cavity effect cutter, finish the cutting to impeller vane, and trigger high speed camera synchronously, dynamic strain indicator and high-speed data acquisition oscillograph, utilizing high speed camera to take blade flies disconnected and bump casing process, strain data when dynamic strain indicator collection casing is hit load, the high-speed data acquisition oscillograph is gathered blade and is flown the moment flexible shaft vibration data that breaks, and then finishes experiment.Because blast fan model difference, the predetermined rotating speed that flies to break is between 5000-15000r/min, and the high speed spinner should satisfy above-mentioned speed demand at least.
Claims (1)
1. the casing based on line style cumulative cutting technique contains test method, it is characterized in that, may further comprise the steps:
Step 1: design linear cavity effect cutter: comprise the explosive load, cross section parameter of the thickness, material and the cutter that design drug-shaped cover etc.;
Step 2: the linear cavity effect cutter that preparation process 1 obtains also is screwed it in the fan blade root;
Step 3: with the blade that the linear cavity effect cutter symmetry is housed counterbalance weight is being set, and is finishing the transient equilibrium of band frock blast fan at dynamic balance instrument;
Step 4: the blast fan that step 3 is obtained is installed on the flexible shaft of high speed spinner clutch end, wireless initiator receiving end is mounted on the axis part of flexible shaft;
Step 5: will simulate casing and use bolt in the test cavity, even with the gap between the coaxial placement of blast fan and assurance and the blade tip, be pasted with foil gauge on the simulation casing, be connected to dynamic strain indicator by lead-in wire;
Step 6: high speed camera hung be fixed in directly over the high speed spinner, and see through bullet proof glass and take test cavity; Two eddy current displacement sensors that are built in high speed spinner inside, become 90 degree to be placed in the flexible shaft lower end are connected to the high-speed data acquisition oscillograph by lead-in wire; Wireless initiator signal transmitting terminal signal lead in the step 4 is connected to the oscillographic trigger end of high speed camera, dynamic strain indicator and high-speed data acquisition;
Step 7: start the high speed spinner, treat that rotating speed rises to predetermined fly disconnected rotating speed and maintenance, send time break and ignite linear cavity effect cutter, finish the cutting to impeller vane, and trigger high speed camera, dynamic strain indicator and high-speed data acquisition oscillograph synchronously, finish the experimental data collection.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510044A (en) * | 2015-12-31 | 2016-04-20 | 苏州东菱科技有限公司 | High-speed rotor blade flying-off test device and test method |
| CN105547702A (en) * | 2015-12-10 | 2016-05-04 | 中国飞机强度研究所 | High-temperature and high-voltage testing device for engine case |
| CN105716962A (en) * | 2016-02-01 | 2016-06-29 | 浙江大学 | Blade local heating constant-speed fly-off test technology used for casing containment test |
| CN106289734A (en) * | 2016-07-21 | 2017-01-04 | 浙江大学 | A kind of aero-engine casing high temperature containment test technology |
| CN107063690A (en) * | 2016-12-03 | 2017-08-18 | 浙江大学 | A kind of contactless local fast heating constant speed of blade for casing containment test flies disconnected experimental technique |
| CN107202681A (en) * | 2016-03-17 | 2017-09-26 | 中国航发商用航空发动机有限责任公司 | Come off the rotor assembly and its method for releasing of experiment |
| CN108716990A (en) * | 2018-06-06 | 2018-10-30 | 中国航发沈阳发动机研究所 | A kind of engine crankcase containment test device |
| CN110030042A (en) * | 2019-04-19 | 2019-07-19 | 中国航发沈阳发动机研究所 | Blade cuts device and containment test device for aerial engine fan casing |
| CN111595546A (en) * | 2020-06-05 | 2020-08-28 | 中国航发沈阳发动机研究所 | Rotor blade fracture structure |
| CN115372010A (en) * | 2022-08-15 | 2022-11-22 | 浙江海骆航空科技有限公司 | Blade flying-off test device and method based on inertial confinement explosion cutting |
| CN115420506A (en) * | 2022-09-08 | 2022-12-02 | 浙江海骆航空科技有限公司 | High-speed rotating blade explosion flying-off phase control test device and method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547702B (en) * | 2015-12-10 | 2018-04-13 | 中国飞机强度研究所 | A kind of engine crankcase high temperature and pressure test device |
| CN105547702A (en) * | 2015-12-10 | 2016-05-04 | 中国飞机强度研究所 | High-temperature and high-voltage testing device for engine case |
| CN105510044A (en) * | 2015-12-31 | 2016-04-20 | 苏州东菱科技有限公司 | High-speed rotor blade flying-off test device and test method |
| CN105716962A (en) * | 2016-02-01 | 2016-06-29 | 浙江大学 | Blade local heating constant-speed fly-off test technology used for casing containment test |
| CN105716962B (en) * | 2016-02-01 | 2018-04-03 | 浙江大学 | A kind of blade local heating constant speed for casing containment test flies disconnected experimental technique |
| CN107202681B (en) * | 2016-03-17 | 2020-04-14 | 中国航发商用航空发动机有限责任公司 | Rotor assembly for drop test and release method thereof |
| CN107202681A (en) * | 2016-03-17 | 2017-09-26 | 中国航发商用航空发动机有限责任公司 | Come off the rotor assembly and its method for releasing of experiment |
| CN106289734A (en) * | 2016-07-21 | 2017-01-04 | 浙江大学 | A kind of aero-engine casing high temperature containment test technology |
| CN107063690A (en) * | 2016-12-03 | 2017-08-18 | 浙江大学 | A kind of contactless local fast heating constant speed of blade for casing containment test flies disconnected experimental technique |
| CN108716990A (en) * | 2018-06-06 | 2018-10-30 | 中国航发沈阳发动机研究所 | A kind of engine crankcase containment test device |
| CN110030042A (en) * | 2019-04-19 | 2019-07-19 | 中国航发沈阳发动机研究所 | Blade cuts device and containment test device for aerial engine fan casing |
| CN111595546A (en) * | 2020-06-05 | 2020-08-28 | 中国航发沈阳发动机研究所 | Rotor blade fracture structure |
| CN115372010A (en) * | 2022-08-15 | 2022-11-22 | 浙江海骆航空科技有限公司 | Blade flying-off test device and method based on inertial confinement explosion cutting |
| CN115420506A (en) * | 2022-09-08 | 2022-12-02 | 浙江海骆航空科技有限公司 | High-speed rotating blade explosion flying-off phase control test device and method |
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