CN105605976B - Gas catapult-launching gear - Google Patents
Gas catapult-launching gear Download PDFInfo
- Publication number
- CN105605976B CN105605976B CN201510965264.5A CN201510965264A CN105605976B CN 105605976 B CN105605976 B CN 105605976B CN 201510965264 A CN201510965264 A CN 201510965264A CN 105605976 B CN105605976 B CN 105605976B
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- China
- Prior art keywords
- cylinder
- testpieces
- piston
- closed slide
- buffer
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of gas catapult-launching gear.It includes gas cylinder, air cylinder group, silencer, buffer and closed slide, and air cylinder group is that piston is provided with cylinder, and piston is connected with piston rod, and the piston rod other end is provided with silencer, and offers multiple apertures on the cylinder wall of silencer covering；Cylinder is connected via dead lock with the gas cylinder, the front end of cylinder is provided with buffer, there is through hole in the middle of buffer, through hole is coaxial with piston rod, and has a diameter larger than the diameter of piston rod but less than the diameter of piston, and certain altitude is laid on the front of buffer to closed slide from the ground, when testpieces is placed on closed slide, testpieces just blocks the through hole of buffer, and the barycenter of testpieces is located at the height at through hole center, and testpieces can be slided on closed slide.The present invention can freely be adjusted according to testpieces speed requirement, and the precision of experiment is improved.
Description
Technical field
The present invention relates to a kind of gas catapult-launching gear, especially for missile launch test or the device of impact test.
Background technology
Guided missile is referred to as ejection using the mode that additionaling power mode is launched.For the device that MISSILE LAUNCHING provides additionaling power claims
It is catapult-launching gear, catapult-launching gear is the key that guided missile is succeeded in sending up, for catapult-launching gear, it has been carried out largely grinding both at home and abroad
Study carefully, have also been developed many catapult-launching gears, the advanced catapult-launching gear AMELT of US military development is successfully applied to F-102 aircrafts hair
" falcon " guided missile is penetrated, frazier Na Shi companies of Britain also have developed similar catapult-launching gear.The LAU-142/ that EDO companies of the U.S. develop
A Pneumatic ejection mechanisms are provided in transmitting " AIM-120AMRAAM " guided missile on F-22 aircrafts.Domestic Qing'an Group Co., Ltd. and sky
The units such as air-to-air missile (AAM) research institute also progressively have developed certain model missile ejector.And with the development of scientific and technological level, it is existing
Catapult-launching gear can not meet current demand, such as ejection speed, existing catapult-launching gear speed about 10m/s, and newest skill
Art requirement is 100m/s, and because guided missile model is numerous, required catapult-launching gear is also a lot, develops catapult-launching gear and also faces all in itself
Many problems, existing experimental study means only have live ammunition, and this mode has high cost, dangerous high, experiment uncertain
Factor is more, the experiment low feature of repeatable poor, test accuracy, supporting model development time and quality all it cannot be guaranteed that, and
Economic, environmental protection, accurate requirement are not adapted to.
The content of the invention
Present invention solves the technical problem that being：Overcome the deficiencies in the prior art, there is provided a kind of economic, low dangerous, experiment
The gas catapult-launching gear of high precision, for the experimental study of body ejection mechanism.
Gas catapult-launching gear of the invention includes gas cylinder, air cylinder group, silencer, buffer and closed slide, the cylinder
To be provided with piston in cylinder, the piston is connected with piston rod to group, and the piston rod other end is provided with silencer, and is disappearing
Multiple apertures are offered on the cylinder wall of sound device covering；The cylinder is connected via dead lock with the gas cylinder, the cylinder
Front end is provided with buffer, there is through hole in the middle of the buffer, and the through hole is coaxial with the piston rod, and has a diameter larger than
The diameter of the piston rod but less than the diameter of the piston, certain altitude is laid on the buffering to the closed slide from the ground
The front of device, when testpieces is placed on the closed slide, the testpieces just blocks the through hole of the buffer,
And the barycenter of the testpieces is located at the height at the through hole center, the testpieces can be slided on the closed slide
It is dynamic.
It is preferred that the terminal part of the piston rod is provided with acceleration transducer.
It is preferred that LD lasers and timer have been oppositely disposed in the both sides of the end of the guide rail, when the testpieces is slided
The closed slide is crossed just when flying out, can be gone through from the middle of the LD lasers and the timer.
It is preferred that also including adaptor, the adaptor can be slided on the closed slide, and the testpieces is detachable
Ground is arranged on the adaptor.
The present invention has the beneficial effect that compared with prior art：
(1) present invention replaces the gunpowder of existing live ammunition experiment as power source using compressed air, reduces examination
The cost tested, and test pollution-free, greatly reduce the danger of experiment；
(2) closed slide that the present invention is used can flexibly be chosen using spacing in the range of 70mm~1000mm, and existing
Live ammunition test a kind of a kind of size body catapult-launching gear of correspondence and compare, substantially increase test efficiency；
(3) compressed air pressure that the present invention is used can freely be adjusted according to testpieces speed requirement, with existing live shell
Emission test is compared, and the precision of experiment is improved, test uncertainty is also minimized.
Brief description of the drawings
Accompanying drawing 1 is system structure diagram of the invention；
Accompanying drawing 2 is cylinder inner trajectory motion principle figure of the invention；
Accompanying drawing 3 is high speed tachometric survey schematic diagram of the invention.
Specific embodiment
As shown in figure 1, gas catapult-launching gear of the present invention by gas cylinder 1, gas bleeder valve 2, pressure gauge 3, safety valve 4, dead lock 5,
Piston 6, cylinder 7, piston rod 8, silencer 9, buffer 10, acceleration transducer 11, testpieces 12, closed slide 13, playback
Mechanism 14, LD lasers 15, timer 16 etc. are constituted.Gas cylinder 1 is connected with cylinder 7, and gas bleeder valve 2, pressure gauge is provided with gas cylinder 1
3 and safety valve 4, dead lock 5 is arranged on cylinder 7 and the cylinder 1 of the connection end of gas cylinder 1, and piston 6 is located in cylinder 7, after cylinder 7
Section wall portion is provided with multiple apertures, and piston rod 8 is connected with piston 6, and silencer 9 is arranged on the end of cylinder 7, and parcel cylinder 7 is with more
The wall portion of individual aperture.Buffer 10 is located at the end of cylinder 7, and the through hole coaxial with the piston rod 8 is provided with the middle of buffer 10, its
With diameter greater than piston rod 8 diameter but less than the diameter of piston 6, acceleration transducer 11 is arranged on the end of piston rod 8, parallel conductive
Certain altitude is laid on the front of buffer 10 to rail 13 from the ground, when testpieces 12 is placed on closed slide 13, experiment
Part 12 just blocks the through hole of buffer 10, and the barycenter of testpieces is located on the height at through hole center, and testpieces 12 can
Slided on closed slide 13.Testpieces 12 is located at when on closed slide 13, is contacted but is not connected to piston rod 8, closed slide
13 spacing can be adjusted, and be used to meet the demand of various sizes of testpieces 12, and playback mechanism 14 is located under closed slide end
Side, LD lasers 15 are located at side after closed slide 13, and timer 16 is corresponding with LD lasers 15 to be arranged on closed slide 13
Opposite side.When testpieces 12 slips over closed slide 13 just to fly out, can be gone through from the middle of LD lasers 15 and timer 16.
When being tested, first inflated from air compressor machine to gas cylinder 1, stopped after reaching predetermined pressure corresponding with test speed demand
Only inflate, open dead lock 5, compressed air instantaneous expansion simultaneously promotes piston 6 to drive piston rod 8 to move, connect with the end of piston rod 8
Tactile testpieces 12 is also moved along closed slide 13 together, and when piston 6 moves to the back segment of cylinder 7 to be provided with aperture, compression is empty
Gas enters silencer 9 and discharges through the aperture of cylinder 7, and piston 6 is collided with buffer 10 and slowed down until stopping, at the same time, trying
Test part 12 to be separated with piston rod 8, separate acceleration and speed are respectively by the acceleration transducer 11 and parallel conductive of the end of piston rod 8
The LD lasers 15 and the surveying record of timer 16 of the end of rail 13 simultaneously provide result.After testpieces 12 is separated and obtains demand speed
Impact test is carried out, the braking development test of body ejection mechanism is substantially carried out.Start playback mechanism 14, playback after the completion of experiment
Mechanism 14 drives leading screw that piston 6 and piston rod 8 are pushed back into original position by motor.
The compressed air that the present invention is used as power source, the present invention according to experiment Demand Design cylinder 7 and piston 6 and
The grade important component of piston rod 8, the size of the internal diameter of cylinder 7 is the key factor for influenceing the motion of piston 6, identical especially in other conditions
It is that the bore of cylinder 7 is bigger, and the motion of piston 6 speed to be reached is bigger, former under the conditions of bleed pressure and travel condition identical
Because being that the internal diameter of cylinder 7 is bigger, the stress surface of piston 6 is bigger, and the acceleration of motion of piston 6 is bigger, similarly, other condition identicals
Under the conditions of particularly muzzle velocity requirement identical under the conditions of, heavy caliber cylinder 7 to bleed pressure requirement be less than small-bore cylinder
7, therefore, select the larger bore of cylinder 7 to be conducive to improving the movement velocity of piston 6.
Required according to experimental performance, the mass of testpieces 12 is between 20kg~500kg, and speed is maximum up to 100m/s, plus
Speed and deceleration distance are 2.5m, it is contemplated that the requirement of experiment atmospheric pressure and test trip, take into account pressure regulation convenience, and combine
Domestic deep hole processing gun tube ability and economic factor, determine that the internal diameter of cylinder 7 elects 400mm as, determine source of the gas from being calmed the anger in 9MPa
Source.
Speed v when piston movement is given below at LLWith the relation of remaining each physical quantity.As shown in Fig. 2 gas cylinder 7 holds
Product is V1, and pressure is P1 in gas cylinder 7 before the setting in motion of piston 6, and temperature is T1, the left gas of piston 6 when at the motion of piston 6 x
Pressure is Px, and temperature is Tx, and volume is Vx.The mass of piston 6 is m, and the overall length of cylinder 7 is L, and inner cylinder sectional area is A.
Gaseous mass is mg, can be tried to achieve according to the equation of gas state
Loss produced by gas expansion and piston movement process is equivalent to the mass incremental of piston 6, coefficient is ε,K values are 1.0~1.1.
By polytropic gas Principle of Process, gas expansion process equation is P1V1γ=PxVxγ
Can be obtained according to newton second theoremWherein
WillBringing above formula into can obtain
Above formula integration can be obtained：
As can be seen here, speed x when piston movement is at LLWith the initial pressure of gas cylinder 7, the internal diameter of cylinder 7, gas composition, gas
7 original volumes of bottle, accelerating travel etc. are relevant, and maximum determinant is the internal diameter of cylinder 7, the initial pressure of gas cylinder 7 and accelerating travel,
Secondly it is the volume of gas cylinder 7, in the case where catapult-launching gear determines, the regulation initial pressure of gas cylinder 7 can realize friction speed demand
Trystate, with existing live ammunition experiment gunpowder fill compared with, the precision of experiment is improved, tests uncertainty
Also it is minimized.
Due to the key index that the separating rate of testpieces 12 is ejection mechanism braking research, it is desirable to speed accurate measurement, it is
This, the present invention uses laser type velocimetry, and its light is stopped when testpieces 12 is moved at the first beam LD lasers 15, tests the speed
Device sends pulse, and left side timer 16 recorded for the first moment, stopped when testpieces 12 is moved at the second beam LD lasers 15
Its light, speed measuring device sends the second subpulse, and right side timer 16 recorded for the second moment, and the spacing between two-beam road is fixed
Value d, the difference Δ t at two moment is the time, then can try to achieve separating rate
Because the size of testpieces 12 is changing value, diameter or the length of side are between 50mm~1000mm, therefore closed slide
13 changes for needing adequacy test part 12, but test very high to the required precision of closed slide 13, between closed slide 13 is changed
Away from carrying out adequacy test part 12 first debug time being long, waste time and energy, second frequently change the spacing of closed slide 13 injury parallel conductive
The body of rail 13, unfavorable to ensureing the precision of closed slide 13, three in long range scope, repeatedly high accuracy regulation closed slide 13 is difficult
Degree is larger, therefore, the system uses fixed closed slide 13, uses the adjustable scheme of spacing, different tests part 12 and parallel conductive
The mode of adaptation adaptor is added to reach test requirements document between rail 13.
Claims (4)
1. a kind of gas catapult-launching gear, it is characterised in that：Including gas cylinder, air cylinder group, silencer, buffer and closed slide, institute
Air cylinder group is stated to be provided with piston in cylinder, the piston is connected with piston rod, and the piston rod other end is provided with silencer,
And offer multiple apertures on the cylinder wall of silencer covering；The cylinder is connected via dead lock with the gas cylinder, described
The front end of cylinder is provided with buffer, there is through hole in the middle of the buffer, and the through hole is coaxial with the piston rod, and its is straight
Footpath is more than the diameter of the piston rod but less than the diameter of the piston, and certain altitude is laid on institute to the closed slide from the ground
The front of buffer is stated, when testpieces is placed on the closed slide, the testpieces just blocks the buffer
Through hole, and the testpieces barycenter be located at the through hole center height, the testpieces can be in the parallel conductive
Slided on rail.
2. according to the gas catapult-launching gear described in claim 1, it is characterised in that：The terminal part of the piston rod is provided with acceleration
Degree sensor.
3. according to the gas catapult-launching gear described in claim 1, it is characterised in that：In the both sides phase of the end of the closed slide
LD lasers and timer are provided with over the ground, when the testpieces slips over the closed slide just to fly out, can be from the LD
Gone through in the middle of laser and the timer.
4. according to the gas catapult-launching gear described in claim 1, it is characterised in that：Also include adaptor, the adaptor can
Slided on the closed slide, the testpieces is removably mounted on the adaptor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510965264.5A CN105605976B (en) | 2015-12-21 | 2015-12-21 | Gas catapult-launching gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510965264.5A CN105605976B (en) | 2015-12-21 | 2015-12-21 | Gas catapult-launching gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105605976A CN105605976A (en) | 2016-05-25 |
| CN105605976B true CN105605976B (en) | 2017-06-27 |
Family
ID=55986113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510965264.5A Expired - Fee Related CN105605976B (en) | 2015-12-21 | 2015-12-21 | Gas catapult-launching gear |
Country Status (1)
| Country | Link |
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| CN (1) | CN105605976B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197937B (en) * | 2016-06-24 | 2018-09-14 | 中国航天空气动力技术研究院 | high speed ejection model quick release device |
| CN106404333B (en) * | 2016-12-05 | 2019-03-01 | 中国航天空气动力技术研究院 | Gas launches traction device |
| CN109406044B (en) * | 2018-11-13 | 2021-06-11 | 中国直升机设计研究所 | Undercarriage buffer air pressure detection method |
| CN110686912A (en) * | 2019-09-12 | 2020-01-14 | 武汉船用机械有限责任公司 | Land test platform |
| CN110608896A (en) * | 2019-09-17 | 2019-12-24 | 上海东方久乐汽车安全气囊有限公司 | Impact model transmitting device for automobile impact test |
| CN110487718A (en) * | 2019-09-18 | 2019-11-22 | 保定市立中车轮制造有限公司 | For detecting the anti-gravel impact capacity projection of aluminum-alloy wheel paint film and speed measuring device |
| CN111157253B (en) * | 2020-01-08 | 2021-07-09 | 成都西交轨道交通装备科技有限公司 | Self-adaptive balance ejection control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333382A (en) * | 1979-12-26 | 1982-06-08 | The United States Of America As Represented By The Secretary Of The Navy | Boost assisted missile launcher |
| CN2166086Y (en) * | 1992-08-03 | 1994-05-25 | 叶海 | Combustion-gas catapult |
| CN101186235A (en) * | 2006-09-26 | 2008-05-28 | 王志勇 | Ejector with enclosed cylinder structure |
| CN104406458A (en) * | 2014-08-27 | 2015-03-11 | 高显明 | Projectile simulation launching device |
| CN204516174U (en) * | 2015-03-27 | 2015-07-29 | 商庆尧 | A kind of Newton second law inquiry experiment instrument based on electromagnetic launch |
-
2015
- 2015-12-21 CN CN201510965264.5A patent/CN105605976B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333382A (en) * | 1979-12-26 | 1982-06-08 | The United States Of America As Represented By The Secretary Of The Navy | Boost assisted missile launcher |
| CN2166086Y (en) * | 1992-08-03 | 1994-05-25 | 叶海 | Combustion-gas catapult |
| CN101186235A (en) * | 2006-09-26 | 2008-05-28 | 王志勇 | Ejector with enclosed cylinder structure |
| CN104406458A (en) * | 2014-08-27 | 2015-03-11 | 高显明 | Projectile simulation launching device |
| CN204516174U (en) * | 2015-03-27 | 2015-07-29 | 商庆尧 | A kind of Newton second law inquiry experiment instrument based on electromagnetic launch |
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| Publication number | Publication date |
|---|---|
| CN105605976A (en) | 2016-05-25 |
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