CN108895932A - For impacting the bullet of the experiment of machanics of gas big gun and testing the device of the velocity of shot - Google Patents
For impacting the bullet of the experiment of machanics of gas big gun and testing the device of the velocity of shot Download PDFInfo
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- CN108895932A CN108895932A CN201810445001.5A CN201810445001A CN108895932A CN 108895932 A CN108895932 A CN 108895932A CN 201810445001 A CN201810445001 A CN 201810445001A CN 108895932 A CN108895932 A CN 108895932A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
- F42B35/02—Gauging, sorting, trimming or shortening cartridges or missiles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
- F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
- G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage
Abstract
The present invention relates to the primary and secondary bullet for impacting gas big gun experiment of machanics and the device of the velocity of shot is measured, belongs to primary and secondary bullet separation technology field, the present invention is directed to special-shaped bullet collision and selectes in the shock dynamics experiment of certain point structure：Internal bullet ball deviates the velocity determination problem of the problem of design flight path and bullet ball, and the structure and bullet speed measuring equipment of careful design primary and secondary bullet solve the problems, such as aforementioned two.Divide valve not against female bullet and windage in experimentation to carry out bullet, but rely on the friction bring heat of female bullet and gun tube and the rotatory inertia of female bullet that female bullet is made reliably to divide valve, the length of target chamber can be shortened using the present invention program, / 5th gas big guns can be reduced and build big gun price, while impact point pointing accuracy and assay reproducibility will be greatly improved.
Description
Technical field
The invention belongs to primary and secondary bullet technical fields, specifically, are related to the special type of the experiment of machanics for impacting gas big gun
Primary and secondary bullet and the device for testing the bullet.
Background technique
In the experiment of machanics of impact gas big gun, frequently with drive of high-pressure gas bullet, it the following is and record technical literature money
Material：
《Dynamic high pressure philosophy and technique》Chapter 2, third section (, Chen Junxiang chief editor modest through good fortune) National Defense Industry Press 2006
It publishes；
Wang Ningyu, for the one-stage light-gas gun of material impacts experiment, explosion and impact, 1993,13 (1)：90-96；
Guo Yangkuan etc., the solution research of the Archimedes' helicoid normal based on matlab and tangent plane, tool technique,
2009,11:77-794；
Liu Gu is right, Hu Qingxi, is cut with the root of disk cutter processing Archimedes' helicoid, mechanical technology teacher, 1997 (1)：
13-14。
As shown in Figure 1, female bullet is made of duroplasts (polycarbonate), the film flying of specific shape is installed on bullet,
After bullet high speed flies over gun tube, film flying shock is fixed on the closing indoor target body of target, to impact to experimental subjects
Load can be tightly combined since general film flying has laminated structure with bullet；It will not when bullet acceleration flight in gun tube
Fall off, at the same metal film flying fly out gun tube when speed can use be mounted on A point in Fig. 1 electromagnetic coil measurement film flying flight
Speed.
But in the experiment of some unique construction Impulsive loads, need the metal or nonmetal sample pair using irregular shape
Certain point of unique construction is impacted, such as spherical or square sample, in the experiment of this gas big gun, sample and bullet as impact
Ball is compared to more small-sized；It needs for the metal or nonmetal sample of small ball-shape or rectangular (or other abnormity) to be embedded in advance
In big bullet body, primary and secondary bullet is constituted, as shown in Figure 1, shrapnel combination accelerates by gas big gun gun tube in experimentation
Afterwards, when being pierced by gun tube, A point, metal or nonmetallic bullet ball obtain speed identical with female bullet in Fig. 1, while in bullet
After the accelerator of gun tube, bullet ball must be kept completely separate combination before crash feature target with female bullet.In addition, by
Metal bullet very little in female bullet can not generate electric signal when A point gun muzzle in being pierced by Fig. 1 in electromagnetic coil, this
Sample can not just measure the speed of primary and secondary bullet.
In this experiment, the material (including female bullet) other than bullet ball collides experimental subjects (structure in Fig. 1
Target) on, it will lead to experimental result and generate serious deviation.
In this experiment, sample size all very littles of collision are generally used for, need to reach three purposes in an experiment,
It can guarantee Success in Experiment：
1, it must be kept completely separate with female bullet after irregular bullet ball (small sample) is accelerated by gun tube；
It 2, will not change of flight direction in irregular small sample and female bullet separation process.It must remain unchanged along gun tube standard
Straight direction flight；After small sample and female bullet fly away from process and fly away from, before running into structure targets, any tube wall or device are encountered
Part can all cause the failure of an experiment.
3, precise measurement bullet ball velocity magnitude before running into target body is needed.
In existing this kind of experiment, there are two types of the technologies of production bullet：
Technical solution one is embedded in bullet front end by female bullet integral manufacturing, by small sample, as shown in Figure 2 a, flies in bullet
After crossing gun tube, bullet front surface encounters the openings of high rigidity tubular in a target chamber, as shown in Figure 1, the tubular device is known as
Miss the target device；Bullet ball density due to being embedded in female bullet front end is much larger than female bullet, at the same the intensity of female bullet also much smaller than
The intensity of openings, primary and secondary bullet can be separated from each other in openings, and female bullet material divides (B point in Fig. 1) outside openings,
Bullet ball carries out Impulsive load to experimental subjects because inertia flies to structure targets, thus completes structure targets dynamics impact experiment.
In such impact experiment, the conventional method for measuring the speed of bullet ball is：Mother and sons' bullet separation before
Used outside closing target chamber high speed camera by the form that is mounted on target chamber face shoot mother and sons' bullet assembly A in Fig. 1, B it
Between flight course the flying speed of bullet calculated by position-corresponding time relationship according to bullet different time present position.
The shortcomings that prior art one：
Existing high-end high speed camera is expensive, the high speed camera price of million width specification per second generally all hundreds of thousands with
On, it is the fuzzy ghost image of strip that the photo of the shrapnel taken in experiment, which is often shown, is difficult accurate interpretation bullet according to photo
The flight position of ball, meanwhile, it is a kind of indirect measure according to the mode that female velocity of shot releases sub- velocity of shot, thus
To bullet ball flying speed numerical value and true value between there are large errors.In order to increase high speed camera measurement accuracy, need
Increase the measurement distance in Fig. 1 between A and B, this will increase the length of closing target chamber；Due to being used as impact gas big gun experiment target chamber
Length is directly proportional to production price, using the method for camera velocity measurement, generally will increase target chamber construction cost 50 to 100 ten thousand and (increases
Cost is also related with target chamber diameter).
The most serious is (velocity of shot height is tested in high velocity impact in the female bullet middle section contacted with metal sublayer bullet
In the experiment of 2000m/s) in be easy to pass through openings together with metal sublayer bullet, run into structure targets, cause entirely to test
Failure.
Two valve shaped samples of separation are made in bullet by technical solution two, and as shown in Figure 2 b, small metal sample is placed in bullet
Front end after bullet flies over gun tube, generates friction with the indoor air of target, separates the bullet of flap-type, metal sample is out of bullet
It flies out, experimental subjects is loaded.
The method of metal sample is measured as one scheme of technology, is taken pictures using high-end high speed camera.
The shortcomings that prior art two：
Under Double-disc type mother bullet and the indoor windage effect of closing target, the female bullet valve and air effect of separation process
Generate vortex；Due to causing bullet to open valve with windage, during opening valve, bullet separates from front to back, at this time Flight Projectile
The flight attitude of valve is opened, as shown in figure 3, valve body is divided to be easy to deviateing built-in bullet ball band into design flight road during this
Line leads to the failure of experiment；
If necessary to do bullet ball using irregular metal (such as square or short cylinder sample) in experiment, with female bullet
The track that irregular surface is generated with windage after separation is more difficult to determine, so that the flight path after separation is easier
There are severe deviations with design flight path, leads to the failure of an experiment；In addition, using the flight of high speed camera measurement shrapnel assembly
The technology of speed with lead to the disadvantage that as scheme one.
Therefore, it is necessary to propose a kind of newly-designed primary and secondary bullet and its isolation technics, while also needing to design a set of survey
The device of quantum bullet overcomes it in the prior art, female bullet be embedded in bullet ball therein unstable, the son that is detached from time-division valve
Projectile flight is unstable, the problem of sub- Projectile velocity measurements not directly, inaccurate.
Summary of the invention
In order to overcome the problems in above-mentioned background technique, the present invention proposes that a kind of flight stability, female bullet can be stablized and son
Bullet is detached from, easily measures bullet ball flying speed simultaneously, for the experiment of gas big gun structural impact primary and secondary compound bullet and
Measure the device of sub- velocity of shot.
To achieve the goals above, the present invention is realized according to following technical scheme：
For impacting the bullet of the experiment of machanics of gas big gun, including bullet ball and female bullet, bullet ball are coated in female bullet
Portion, female projectile structure are split-type petal-like structures.
Further preferred technical solution is that female bullet is the petal-like structures of more valves, and every valve is equipped with A Ji meter
Moral helicoid；Valve number is 3 to 5 valves, and every valve side is respectively formed helix.
Further preferred technical solution is that female bullet is made of polycarbonate, and each petaloid of female bullet
The helix degree of twining that bullet side opens up is different.
Further preferred technical solution is to be equipped on every valve of multi-clove type mother's bullet and Archimedian screw
The parallel metal layer in face, metal are placed on female bullet and divide middle and lower part in valve, and metal layer thickness is less than a quarter of bullet diameter,
Metal layer presents carefully lower coarse-texture.
Further preferred technical solution is that female bullet limb is twisted place and is coated with vacuum grease, and in vacuum grease
Adulterate carbonic acid ammonia micron particles.
For test impact the sub- velocity of shot of gas big gun experiment of machanics device, using a watt petaloid velocity coils spin type paving
The sub- gun tube if formation is tested the speed.
Further preferred technical solution is that the gun tube that tests the speed can change the ruler of diameter according to the size of bullet
It is very little, inducted electric signal when achieving the purpose that measure sub- projectile flight.
Beneficial effects of the present invention：
1, after female bullet is according to present invention design, the helix of female bullet avris has gyrocompassing effect, so that bullet
Ball accelerates rotation in gun tube in emission process, Rotary Projectile does not deviate by the direction of the launch after being pierced by gun muzzle.Due to rotation
Bullet will not be flipped being pierced by gun muzzle in-flight, and the order of accuarcy of bullet ball orientation collision greatly improves.
2, divide valve mode using female bullet in the present invention；Unlike traditional design, female bullet is in the gun tube that flies out
When, the rotational momentum of female body is mostly in aft body, so as to cause every valve from it is rear to preceding from female bullet body it is fast
Speed is split off, such as Fig. 8.Entirely valve process is divided to carry out in a vacuum, female bullet will not because of with windage and generate deflection, point
Valve process bullet ball will not be by female bullet any influence.
Bullet ball is placed in female bullet rear end, it is parallel with for rotating metallic layer position, it reduces female bullet and is connect with bullet ball
The time is touched, in addition, in the present invention, not needing using the device that misses the target；Target chamber length is thus effectively reduced, gas big gun is reduced
The construction cost of experimental provision；Using the present invention, it is possible to reduce target chamber construction cost 50 to 100 ten thousand.
3, differentiated with traditional primary and secondary bullet isolation technics to be：The vacuum grease mixed carbonic acid ammonia micron used in the present invention
Particle smears contact position between valve ball, by the friction bring heat with gun tube carbonic acid ammonia micron particles is decomposed；It decomposes
The pressure of generation keeps score valve more quickly and reliable.
4, differentiated with traditional primary and secondary bullet isolation technics to be：Gas big gun target chamber is evacuated in the present invention；It in this way can be with
Guarantee that primary and secondary bullet will not be flipped after the gun tube that flies out because of the turbulent flow generated with windage, in present invention side
Bullet ball can be done using irregular metal under case.Thus the range of choice of experimental subjects is extended.
5, the flying speed different for bullet, the degree of twining of the helix of the setting of female bullet avris be designed to it is different,
In low speed, the degree of twining that every valve opens side is small, and short distance rotation speed is accelerated in gun tube, and in high speed, every valve opens the degree of twining on side
Greatly, the stability that female bullet flies in gun tube had not only been guaranteed, but also can guarantee that female bullet can steadily divide valve after the gun tube that flies out.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of common gas big gun；
Fig. 2 a, Fig. 2 b are to commonly use whole valve ball and two-flap type projectile structure schematic diagram；
Fig. 3 is the flight attitude schematic diagram of bullet in the prior art；
Fig. 4 is bullet side structure schematic diagram；
Fig. 5 is bullet schematic diagram of internal structure I；
Fig. 6 is bullet schematic diagram of internal structure II；
Fig. 7 is bullet schematic diagram of internal structure III；
Fig. 8 is that bullet of the present invention opens valve flight attitude schematic diagram；
Fig. 9 is watt petaloid velocity coils schematic diagram that the present invention tests the speed for bullet bullet；
Figure 10 is watt petaloid velocity coils scheme of installation that the present invention tests the speed for bullet bullet；
Figure 11 a, Figure 11 b are the web-like testing tube cross-sectional view I for installing watt petaloid velocity coils；
Figure 12 is the external installation diagram of web-like testing tube of watt petaloid velocity coils；
Figure 13 is the bracket and pedestal main view of watt petaloid velocity coils；
Figure 14 is the bracket and base vertical view of watt petaloid velocity coils；
Figure 15 be bullet ball-test the speed gun tube adapt to experiment flow figure；
Figure 16 is typical tachometer signal schematic diagram I；
Figure 17 is typical tachometer signal schematic diagram II.
In figure, 1- bullet ball, 2- open side, mother's 3- bullet top, mother's 4- bullet bottom, 5- slot, 6- Archimedian screw
Face, 7- metal layer, 8- outer edge, 9- watts of petaloid velocity coils, 10- positive and negative anodes, 11- magnetic fluid, 12- metal thin bar, 13- circle
Axis, 14- disc spring, 15- impetus, 16- bracket, 17- install route, 18- pedestal, 19- bolt b, 20- level big gun, 21- bolt
a。
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the technical solution below in the present invention carries out clear
Chu is fully described by, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The preparation of experimentation：
Target chamber (see Fig. 1) is sealed in experimentation to be evacuated.
In the manufacturing process of female bullet, three to five flap-type are made in female bullet, Fig. 4 is bullet lateral plan, bullet ball 1
It is located proximate to female bullet bottom.
Female every valve interior shape of bullet is in petal-shaped, is twisted integral.
It is 2 that female every valve of bullet, which opens side,；3 be in inner concavity at the top of female bullet；Female bullet bottom 4 is in inner concavity；At the top of female bullet
3 effect makes female bullet stablize rotation；When plenum chamber in Fig. 1 releases gas, female bullet bottom 4, which can keep stablizing, pushes mother
Projectile flight.
Fig. 5 is bullet interior views I, and Archimedes' helicoid 6 is presented inside every valve of petaloid mother's bullet；In female bullet
Dig the slot 5 for having placement bullet ball；Fig. 6 is bullet interior views II, and every valve bullet middle and lower part is equipped with and Archimedes' helicoid 6
Parallel metal layer 7, metal layer 7 are placed in female bullet and divide middle and lower part position inside valve, and 7 thickness of metal layer is less than female bullet diameter
A quarter, metal layer 7 present carefully lower coarse-texture.
Fig. 7 is projectile structure schematic diagram III；Vacuum grease, vacuum grease are coated in the twisted contact outer edge 8 of female bullet limb
Middle doping carbonic acid ammonia micron particles guarantee that carbonic acid ammonia does not decompose, the rotation of bullet are relied in experiment by Pellet condensation before experiment
Friction between gun tube brings heat, so that the ammonium carbonate particle breakdown at limb combination outer in vacuum grease, decomposes gas
So that there are certain pressure between limb before gun muzzle out for limb, and after gun muzzle out, pressure quick release, so that limb
It quickly bursts, such as Fig. 8, and then achievees the purpose that quickly to divide valve.
The device of the test impact sub- velocity of shot of gas big gun experiment of machanics is placed in the outlet of gas big gun, before device uses multisection type pipeline
Connection is made afterwards, and a watt petaloid velocity coils 9 are equipped on pipeline, the curved surface and bullet formed such as Fig. 9, watt petaloid velocity coils 9
Heading is parallel；Metal bullet be by that can generate voltage in the positive and negative two-stage of coil when watt petaloid velocity coils 9 in experiment,
Watt petaloid velocity coils 9 draw positive and negative anodes 10；Positive and negative anodes 10 connect peripheral equipment high-speed oscilloscope, and watt petaloid velocity coils 9 are felt
Raw voltage is by oscillograph recording.
Thus it can be read by oscillograph at the time of bullet ball 1 leaps each coil；Distance L between two adjacent windings is removed
Bullet ball flying speed can be obtained with the induced potential time t that bullet leaps two adjacent watt of petaloid velocity coils.
In addition, be annularly equipped with magnetic fluid 11 in the inside of watt petaloid velocity coils 9, such as Fig. 9, in experimentation, bullet
Ball 1 is by the pipeline that tests the speed, and induced electric field will lead to magnetic fluid and do tiny flow in watt petaloid velocity coils 9, and this flowing causes
Induced electric field further enhances in watt petaloid velocity coils 9.
Watt petaloid velocity coils 9 are mounted on spiral type disc spring 14, such as Figure 10, install main view for coil；Watt petaloid is surveyed
Fast coil 9 installs route 17 and installs side view such as Figure 11 a in helically twisted distribution on pipeline of testing the speed for coil.
In order to realize the above experiment effect, multiple parallel connection of coils of use, such as Figure 11 b.
As the outer of Figure 12, disc spring 14 are equipped with multiple impetus 15；It is uniformly distributed along pipe lengths；Connect impetus
15 are equipped with cord.Cord is pulled in experiment, rolls tightly disc spring 14, and bullet 1 is only provided and passes right through pipeline, it is possible thereby to measure maximum
Electrical signal intensity of inducting.
Such as Figure 12,14 endpoint of disc spring is fixed in a metal thin bar 12, and 12 direction of metal thin bar is parallel with gun tube direction；
Metal thin bar 12 is fixed on bracket 16, and such as Figure 13, which is supporting structure main view；It is the vertical view of supporting structure such as Figure 14
Figure.Bracket is made of left and right two parts, the fixed metal thin bar 12 of rightmost support 16；Leftmost support 16 is equipped with a bolt a 21,
Bolt a21 right end installation one is parallel to the circular shaft 13 of metal thin bar 12, for stablizing 14 shape of disc spring.Circular shaft 13 passes through bolt
21 right end, and can be rotated in bolt 21.Precession screws out bolt a21, and distance is adjustable between metal thin bar 12 and circular shaft 13.
The distance between metal thin bar 12 and circular shaft 13 and 14 interior diameter synchronous change of disc spring.
Entire bracket 16 is fixed on pedestal 18, and bolt b 19 is equipped on pedestal 18, and bolt b 19 is used for adjustment base
18 level is equipped with air level 20 on pedestal 18, for observing whether pedestal 18 is in a horizontal position.Bracket 16, disc spring 14
Installation site, bolt a 21, bolt b 19,20 installation site of air level such as Figure 13-14.
Implement bullet ball-of the invention test the speed gun tube adapt to experiment flow see Figure 15.
Four bolt b19 of pitot tube pedestal are first adjusted, until test the speed nozzle and gun tube mouth face, while pedestal 18 is in water
Level state.The degree of twining that every valve opens 2 inclination angle of side is calculated according to the length of female bullet and female projectile flight velocity magnitude, by bullet ball 1
It is placed in female bullet, emits female bullet, whether observation bullet ball 1, which passes through, after the test is preset larger-diameter pitot tube, if
Bullet ball 1 does not pass through, then changes the degree of twining that every valve on female bullet opens side 2, increase the rotation speed of female bullet, and valve is divided to stablize；
After bullet ball 1 passes through pitot tube, reduce the pipe diameter that tests the speed, until tachometer signal is clear；So far bullet ball 1 crash feature target spot
Test satisfactory completion.
Embodiment 1
For impacting the structure of the bullet of bubble dynamics experiment：
For impacting the bullet of the experiment of machanics of gas big gun, including bullet ball and female bullet, bullet ball 1 are coated in female bullet
Portion, female projectile structure are split-type petal-like structures.
Further optimal technical scheme is that female bullet is the structure of more valves, and every valve interior shape is in petal-shaped,
Be twisted it is integral, valve number be 3 to 5 valves, each petaloid bullet side offers helix.
Further optimal technical scheme is that the every valve of female bullet opens side 2；3 be in inner concavity at the top of female bullet；Female bullet
Ball bottom 4 is in inner concavity, has Archimedes' helicoid 6 inside every valve of petaloid mother's bullet；Female bullet offers placement bullet
The slot 5 of ball.
Further optimal technical scheme is that female bullet is made of polycarbonate, and each petaloid of female bullet
The helix degree of twining that bullet side opens up is different.
Further optimal technical scheme is to be equipped on every valve of multi-clove type mother's bullet and Archimedian screw
The parallel metal layer 7 in face, metal layer 7 are placed in female bullet and divide middle and lower part in valve, and 7 thickness of metal layer is less than four points of female bullet diameter
One of, metal layer 7 presents carefully lower coarse-texture.
Further optimal technical scheme is that female bullet limb is twisted place and is coated with vacuum grease, and in vacuum grease
Carbonic acid ammonia micron particles are adulterated, need to carry out freezing processing before experiment.
With the bullet cooperation for impacting bubble dynamics experiment for testing the impact sub- velocity of shot of gas big gun experiment of machanics
Device structure：For testing the device of the impact sub- velocity of shot of gas big gun experiment of machanics, using connection before and after multisection type pipeline
It is made, a watt petaloid velocity coils 9 is installed on the pipeline that tests the speed, the curved surface and projectile flight direction that watt petaloid velocity coils 9 are formed
In parallel, watt petaloid velocity coils 9 draw positive and negative anodes 10, and positive and negative anodes 10 connect peripheral equipment high-speed oscilloscope.
Further optimal technical scheme is that 9 inside of watt petaloid velocity coils is annularly equipped with magnetic fluid 11.
Further optimal technical scheme is that watt petaloid velocity coils 9 are mounted on spiral type disc spring 14, watt valve
Shape velocity coils 9 install the helically twisted distribution on pipeline of route 17, and 14 endpoint of disc spring is fixed in a metal thin bar 12, gold
It is parallel with gun tube direction to belong to 12 direction of thin bar, and a circular shaft 13 for being parallel to metal thin bar 12 is installed, pulls disc spring another
Endpoint 15, while bolt a21 is adjusted, distance is adjustable between metal thin bar 12 and circular shaft 13, tests the speed in pipeline it is possible thereby to control
The size of hollow internal diameter r.
Figure 16 and Figure 17 is the type signal measured using pitot tube of the invention, when bullet ball passes through pitot tube, figure
16 for pitot tube when being relatively large in diameter and the signal that measures when not installing magnetic fluid 11；Figure 17 is the signal measured after tensing 15；Figure
Pass through the time of two adjacent tile style velocity coils in 17 between 1 and 2 for bullet ball.Find out from the comparison of two figures, using present invention side
Experiment effect is improved after case.
Embodiment 2
For impacting the improvement of the bullet device of bubble dynamics experiment：
Difference from Example 1 is that slot 5 is replaced using sample bin.
And for weak magnetic conductor as bullet ball, changes a watt petaloid velocity coils 9 into superconducting coil, can improve in this way
Cost (100,000 or so), but measurement accuracy can be increased.
For impacting the bullet of the experiment of machanics of gas big gun, including bullet ball 1 and female bullet, bullet ball 1 are coated on female bullet
Inside, female projectile structure are split-type petal-like structures.
Further optimal technical scheme is that female bullet is the structure of more valves, and every valve interior shape is in petal-shaped,
Be twisted it is integral, valve number be 3 to 5 valves, each petaloid bullet side offers helix.
Further optimal technical scheme is that the every valve of female bullet opens side 2；3 be in inner concavity at the top of female bullet；Female bullet
Ball bottom 4 is in inner concavity, has Archimedes' helicoid 6 inside every valve of petaloid mother's bullet；Female bullet offers placement bullet
The sample bin of ball 1.
Further optimal technical scheme is that female bullet is made of polycarbonate, and each petaloid of female bullet
The helix degree of twining that bullet side opens up is different.
Further optimal technical scheme is to be equipped on every valve of multi-clove type mother's bullet and Archimedian screw
The parallel metal layer 7 in face, metal layer 7 are placed in female bullet and divide middle and lower part in valve, and 7 thickness of metal layer is less than four points of female bullet diameter
One of, metal layer 7 presents carefully lower coarse-texture.
Further optimal technical scheme is that female bullet limb is twisted place and is coated with vacuum grease, and in vacuum grease
Carbonic acid ammonia micron particles are adulterated, carry out freezing processing before testing.
With the bullet cooperation for impacting bubble dynamics experiment for testing the impact sub- velocity of shot of gas big gun experiment of machanics
Apparatus structure：
For testing the device of the impact sub- velocity of shot of gas big gun experiment of machanics, it is made of connection before and after multisection type pipeline,
It tests the speed and superconducting coil is installed on pipeline, the curved surface that superconducting coil is formed is parallel with projectile flight direction, and superconducting coil extraction is just
Cathode 10, positive and negative anodes 10 connect peripheral equipment high-speed oscilloscope.
Further optimal technical scheme is that magnetic fluid 11 is annularly equipped with inside the superconducting coil.
Further optimal technical scheme is that the superconducting coil is mounted on spiral type disc spring 14, superconducting coil peace
Fill route helically twisted distribution on pipeline, 14 endpoint of disc spring is fixed in a metal thin bar 12,12 direction of metal thin bar with
Gun tube direction is parallel, and is equipped with a circular shaft 13 for being parallel to metal thin bar 12, pulls another endpoint 15 of disc spring 14, adjusts simultaneously
Bolt a21 is saved, distance is adjustable between metal thin bar 12 and circular shaft 13, and distance changes the size with hollow internal diameter r in the pipeline that tests the speed
It is synchronous.Circular shaft 13 is mounted on the bracket 16 outside pitot tube, and branch is placed on the pedestal 18 of adjustable horizontal.
The above is the preferred embodiment of the present invention, although by above preferred embodiment, to the present invention into
Go detailed description, however, those skilled in the art should understand that, it can be variously modified in the form and details,
Without departing from range required by claims of the present invention.
Claims (10)
1. the bullet for the experiment of machanics for impacting gas big gun, including bullet ball and female bullet, which is characterized in that bullet ball is coated on
Inside female bullet, female projectile structure is split-type petal-like structures.
2. according to claim 1 for impacting the bullet of the experiment of machanics of gas big gun, it is characterised in that：Female bullet
For more valve structures, every valve interior shape is in petal-shaped, is twisted integral, and valve number is 3 to 5 valves, and each petaloid bullet side is equal
Offer helix.
3. according to claim 2 for impacting the bullet of the experiment of machanics of gas big gun, it is characterised in that：Female bullet
Every valve opens side；It is in inner concavity at the top of female bullet；Female bullet bottom is in inner concavity, has A Ji meter inside every valve of petaloid mother's bullet
Moral helicoid；Female bullet offers the slot of placement bullet ball.
4. according to claim 2 for impacting the bullet of the experiment of machanics of gas big gun, it is characterised in that：Female bullet
It is made of polycarbonate, and the helix degree of twining that female bullet each petaloid bullet side opens up is different.
5. according to claim 3 for impacting the bullet of the experiment of machanics of gas big gun, it is characterised in that：The multi-clove type
The metal layer parallel with Archimedes' helicoid be installed, metal is placed under female bullet divides in valve on every valve of female bullet
Portion, metal layer thickness are less than a quarter of female bullet diameter, and metal layer presents carefully lower coarse-texture.
6. according to claim 2 for impacting the bullet of the experiment of machanics of gas big gun, it is characterised in that：Female bullet
Limb is twisted place and is coated with vacuum grease, and carbonic acid ammonia micron particles are adulterated in vacuum grease, and needs to carry out freezing processing before testing the speed.
7. the device for testing the impact sub- velocity of shot of gas big gun experiment of machanics, which is characterized in that using before and after multisection type pipeline
Connection is made, and a watt petaloid velocity coils are equipped on the pipeline that tests the speed, the curved surface and projectile flight side that watt petaloid velocity coils are formed
To parallel, watt petaloid velocity coils extraction positive and negative anodes, connection peripheral equipment high-speed oscilloscope.
8. according to claim 7 for testing the device of the impact sub- velocity of shot of gas big gun experiment of machanics, it is characterised in that：
Watt petaloid velocity coils inside is annular in shape and is equipped with magnetic fluid.
9. according to claim 7 for testing the device of the impact sub- velocity of shot of gas big gun experiment of machanics, it is characterised in that：
Watt petaloid velocity coils are mounted on spiral type disc spring, and a watt petaloid velocity coils installation route helically twists on pipeline
Shape distribution, disc spring endpoint are fixed in a metal thin bar, and metal thin bar direction is parallel with gun tube direction, and it is parallel to be equipped with one
Distance is adjusted by the bolt that rotation is fixed on bracket between the circular shaft of metal thin bar, metal thin bar and circular shaft, spiral shell
Bolt is mounted on the bracket to test the speed outside pipeline, pulls another endpoint of disc spring, the size r of hollow internal diameter is with change in the pipeline that tests the speed
Change.
10. according to claim 7 for testing the device of the impact sub- velocity of shot of gas big gun experiment of machanics, feature exists
In：Multiple connection cords are uniformly distributed in pipe lengths, disc spring, for the disc spring after fixed strain.
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| CN110852008A (en) * | 2019-11-05 | 2020-02-28 | 西安交通大学 | Electromagnetic measuring method for projectile velocity in impact extrusion process of countersunk bullet |
| CN112798440A (en) * | 2020-12-28 | 2021-05-14 | 中南大学 | High-speed impact penetration resistance performance testing device and testing method for honeycomb structure |
| CN113465862A (en) * | 2021-07-03 | 2021-10-01 | 中国飞机强度研究所 | Discrete source distributed impact test device and method |
| CN114061383A (en) * | 2021-10-29 | 2022-02-18 | 上海机电工程研究所 | Test simulation method and system for vibration separation of shrapnel under overload condition |
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Effective date of registration: 20210623 Address after: No. 1503, 15th floor, unit 1, building 3, 387 Tianren Road, high tech Zone, Chengdu, Sichuan 610041 Patentee after: Chengdu Titan Future Technology Co.,Ltd. Address before: 621010, No. 59, Qinglong Avenue, Fucheng District, Sichuan, Mianyang Patentee before: Southwest University of Science and Technology |