CN101493391B - Pneumatic power bullet transmission cylinder for material dynamic performance experiment - Google Patents

Pneumatic power bullet transmission cylinder for material dynamic performance experiment Download PDF

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Publication number
CN101493391B
CN101493391B CN200910116213XA CN200910116213A CN101493391B CN 101493391 B CN101493391 B CN 101493391B CN 200910116213X A CN200910116213X A CN 200910116213XA CN 200910116213 A CN200910116213 A CN 200910116213A CN 101493391 B CN101493391 B CN 101493391B
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CN
China
Prior art keywords
cover
cap
valve rod
tracheae
cylinder
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CN200910116213XA
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Chinese (zh)
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CN101493391A (en
Inventor
赵光明
宋顺成
孟祥瑞
王庭辉
刘筱玲
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安徽理工大学
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Priority to CN200910116213XA priority Critical patent/CN101493391B/en
Publication of CN101493391A publication Critical patent/CN101493391A/en
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Publication of CN101493391B publication Critical patent/CN101493391B/en

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Abstract

A pneumatic bullet launching cylinder used in material dynamic performance experiments belongs to the technical field of material performance tests. The invention aims at providing the pneumatic bullet launching cylinder which is characterized by simple structure, being stable and reliable, high operating efficiency and low experiment cost and is used in the material dynamic performance experiments. The technical points are as follows: the launching cylinder is divided into two launching air cavities (14) by a middle through cover (6), the end surface separated by the middle through cover takes the shape of a disc, a through hole controlled by a ball valve is arranged on the end surface and an air tube is positioned at the middle of the end surface; a hollow valve rod (5) is arranged between a left end cover (2) and an air tube end of the middle through cover, and one end of the valve rod is adjacent to the air tube end of the middle through cover; the other end of the valve rod is internally provided with a chock (51) and positioned inside a control air cavity (11) inside a rear end cover (1) fixed on the left end cover; the launching air cavity is provided with a gas filling hole (12); the other end of the air tube of the middle through cover is positioned inside a round hole arranged in a right end cover (7) and butted against an air tube fixed on a flange (8) on the right end cover; and an elastic tube (9) is connected inside the air tube on the flange in a threaded way.

Description

The Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment

Technical field

The present invention relates to the material properties test field, relate in particular to the dynamic performance testing of material, relate in particular to a kind of Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment.

Background technology

For the dynamic physical mechanical property of research material, the nineteen forty-six American has developed first gas big gun that utilizes lighter-than-air gas to do emission, after, light gas is that all kinds light-gas gun device of actuating medium is come out one after another.And be widely used in the dynamic physical mechanical property of research metal, rock, insulating material and other relevant material, comprise characteristic such as shock wave and stress wave propagation in the different materials such as conductance of high pressure state equation, material damage criterion, elastic-plastic constitutive relation, insulating material.

The light-gas gun experimental technique is to answer the demand of material kinetics development at universal rapidly a kind of strong dynamic load Experiments of Machanics equipment of the fifties later stage in last century, except that fraction is used for the outer trajectory experiment, mainly be the high speed loading experiment of realizing the material uniaxial train by the flat nose bump.Existing dynamic state material performance testing device divides from power source, has with light gas to be the light-gas gun of power and to be the smooth bore big gun of power source with the gunpowder, adopts the compressed gas big gun to compare with the smooth bore big gun that drives with gunpowder and has following advantage:

(1) light-gas gun does not have the noise and the exhaust emission of gunpowder big gun, is convenient in indoor application, thereby can uses more perfect measuring technique, can increase work efficiency simultaneously;

(2) the compressed gas big gun drives air pressure change bullet speed to regulate, and it is adjustable continuously, good reproducibility, and the experiment that accurately contrasts for needs is very important;

(3) need investigate parts in the bullet (such as fuse, explosive) survivability and carry out measuring in the bullet in the experiment of (such as acceleration, strain), the high pressure-temperature driving gas of gunpowder big gun and high launching acceleration have constituted serious threat to the success of experiment, and the trouble of compressed gas big gun is with regard to much less.

Existing problems are at present: existing light-gas gun complex structure, operational efficiency is low, the experimental cost height, and control emission by a mobile entity piston in the experiment, and opening the cone valve emission bullet has tangible delay phenomenon, and main cause is that the control air chamber in the transmission cylinder is bigger than normal on the one hand, indoor gas pressure reduces needs certain hour, the weight of entity piston is big on the other hand, and at piston two sides pressure reduction hour, piston moves that difficulty causes can not the normal transmission bullet.

Summary of the invention

The purpose of this invention is to provide a kind of simple in structure, reliable and stable, operational efficiency is high and experimental cost is low Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment.

Its technical scheme is: a kind of Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment, comprise the transmission cylinder and the bomb tube that constitute by left and right end cap and cylinder body, it is characterized in that: be divided into left and right two emission gas chamber by middle through cover in the cylinder body of transmission cylinder, the tangent plane of middle through cover is the T-shape that side is fallen, the end face of its separation is and launches discoid that gas chamber's diameter is complementary, offer the open-work by ball valve control on it, the centre is provided with tracheae; Between tracheae one end of the middle through cover that circular hole of offering in the left end cap and end face are in the form of annular discs hollow valve rod is installed, hollow valve rod is made of the structure of variable cross section the hollow stem of two-section different-diameter; One end of hollow valve rod is a wedge shape, and is adjacent with tracheae one end of middle through cover, in the other end of hollow valve rod chock is installed, and places in the control gas chamber that offers in the rear end cap that is fixed on the left end cap; Left side emission gas chamber offers gas injection hole; The tracheae other end of middle through cover places in the circular hole of offering in the right end cap, and be fixed on right end cap on flange on tracheae communicate; Bomb tube is by in the tracheae that is threaded in flange; The central axis of described rear end cap, left end cap, cylinder body, hollow valve rod, middle through cover, right end cap, flange and bomb tube is on same axis.

Above-mentioned hollow valve rod is made of the structure of variable cross section the hollow stem of two-section different-diameter.

Its technique effect is: Pneumatic power bullet transmission cylinder of the present invention, owing in transmission cylinder, be provided with control gas chamber and emission gas chamber, 2 air chambers links to each other with gas cylinder by control system respectively, realize emission to bullet, and will launch gas chamber be made as about two gas chamber, so can be according to the rate request of emission bullet, inject the emission gas of different volumes, when the bullet emission rate is had relatively high expectations, then can pass through the volume requirement of two gas chamber with assurance emission gas, otherwise, when the bullet emission rate is required to hang down, then can close an emission gas chamber, like this, can save gas and gas injection time by ball valve; Simultaneously, valve rod is designed to hollow-core construction, has alleviated the weight of valve rod self greatly, the dirigibility that has improved valve stem slides; By the structural design of valve rod variable cross section, guaranteed the area difference of valve rod pressurized in two air chambers, improved the force-bearing situation of valve rod; In addition, transmission cylinder of the present invention is simple in structure, and is reliable and stable, debug easy to use, make and maintenance cost low, both directly emission bullet carried out the MATERIALS ' DYNAMIC compression experiment, can change bomb tube into high-pressure air pipe easily again, directly insert dynamic tensile test device, realize that a cylinder uses more.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of middle through cover;

Fig. 3 is the structural representation of valve rod.

Embodiment

As Figure 1-3, a kind of Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment comprises the transmission cylinder and the bomb tube that are made of left and right end cap and cylinder body.Be divided into left and right two emission gas chamber 13,14 by middle through cover 6 in the cylinder body of transmission cylinder.The tangent plane of middle through cover is the T-shape that side is fallen, the end face of its separation for chamber diameter be complementary discoid 61, offer open-work 62 on it by ball valve 64 controls, the centre is provided with tracheae 63.Hollow valve rod 5 is installed between the tracheae end of the middle through cover that circular hole of offering in the left end cap 2 and end face are in the form of annular discs, and an end of valve rod is a wedge shape 54, and is adjacent with the tracheae end of middle through cover; Chock 51 is installed in the other end, and places in the control gas chamber 11 that offers in the rear end cap 1 that is fixed on the left end cap.The emission gas chamber of valve rod one side offers gas injection hole 12.The tracheae other end of middle through cover places in the circular hole of offering in the right end cap 7, and be fixed on right end cap on flange 8 on tracheae communicate.Bomb tube 9 is by in the tracheae that is threaded in flange.

In order to improve the force-bearing situation of valve rod, above-mentioned hollow valve rod is made of the structure of variable cross section the hollow stem of two-section different-diameter.One diameter transition 53 is arranged between the two-section hollow stem.

The processing and fabricating of hollow valve rod for convenience offers center pit 55 at an end of chock, offers center pit 56 in body of rod wedge shape surface of contact end.

Above-mentioned rear end cap realizes sealing fit by O-ring seal and cylinder body, and valve stem slides rubbing contact section seals by two y-shaped rings in front and back end and cylinder body, and frictional resistance is little, move steadily, and assurance control air chamber and the gases at high pressure isolation of launching in the air chamber.In addition, the front end at valve rod has the wedge shape surface of contact and the O RunddichtringO is housed, the sealing of realization valve rod and middle through cover.These favorable sealing properties have guaranteed the normal use of cylinder.Each part of transmission cylinder is independently made, and by O-ring seal and screw each several part is combined into integral body.

The central axis of above-mentioned rear end cap, left end cap, cylinder body, valve rod, middle through cover, right end cap, flange and bomb tube is on same axis.

Its principle of work: during use, at first pack bullet into to the bottom at bomb tube 9, in control gas chamber 11, inject gases at high pressure then, the pressure of gases at high pressure promotes valve rod 5 and slides to the right, with the wedge shape surface of contact of valve rod front end and the tracheae end butt of middle through cover 6, the passage of automatic shutoff middle through cover tracheae.Then, in emission air chamber 14, inject high pressure emission gas by gas injection hole 12.During the bullet emission, by discharging the gas in the control gas chamber, make the valve rod two ends have pressure differential, promoting valve rod slides left, the wedge shape surface of contact of valve rod front end separates with the tracheae end in contact of middle through cover, gases at high pressure in the emission gas chamber then enter the tracheae of middle through cover, thereby promote bullet along bomb tube 9 high-speed motions.

Claims (1)

1. Pneumatic power bullet transmission cylinder that is used for material dynamic performance experiment, comprise the transmission cylinder and the bomb tube that constitute by left and right end cap and cylinder body, it is characterized in that: be divided into left and right two emission gas chamber (13,14) by middle through cover (6) in the cylinder body of transmission cylinder, the tangent plane of middle through cover is the T-shape that side is fallen, the end face of its separation is and launches discoid that gas chamber's diameter is complementary, offer the open-work by ball valve control on it, the centre is provided with tracheae; Between tracheae one end of the middle through cover that circular hole of offering in the left end cap (2) and end face are in the form of annular discs hollow valve rod (5) is installed, hollow valve rod (5) is made of the structure of variable cross section the hollow stem of two-section different-diameter; One end of hollow valve rod is a wedge shape, and is adjacent with tracheae one end of middle through cover, and chock (51) is installed in the other end of hollow valve rod, and places in the control gas chamber (11) that offers in the rear end cap (1) that is fixed on the left end cap; Left side emission gas chamber offers gas injection hole (12); The tracheae other end of middle through cover places in the circular hole of offering in the right end cap (7), and be fixed on right end cap on flange (8) on tracheae communicate; Bomb tube (9) is by in the tracheae that is threaded in flange; The central axis of described rear end cap, left end cap, cylinder body, hollow valve rod, middle through cover, right end cap, flange and bomb tube is on same axis.
CN200910116213XA 2009-02-19 2009-02-19 Pneumatic power bullet transmission cylinder for material dynamic performance experiment CN101493391B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910116213XA CN101493391B (en) 2009-02-19 2009-02-19 Pneumatic power bullet transmission cylinder for material dynamic performance experiment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910116213XA CN101493391B (en) 2009-02-19 2009-02-19 Pneumatic power bullet transmission cylinder for material dynamic performance experiment

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Publication Number Publication Date
CN101493391A CN101493391A (en) 2009-07-29
CN101493391B true CN101493391B (en) 2011-05-04

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865633A (en) * 2010-06-04 2010-10-20 哈尔滨工程大学 Dynamic tile sealing pneumatic ejection transmitter
CN104458289B (en) * 2014-11-28 2016-11-09 重庆长安汽车股份有限公司 Impacter for steering dynamic impact test
CN104534924B (en) * 2014-12-11 2016-03-16 哈尔滨工业大学 A kind of rotating light-gas gun device
CN104713771A (en) * 2015-02-12 2015-06-17 洛阳利维科技有限公司 Launcher of Hopkinson equipment
CN107271264B (en) * 2017-07-26 2019-06-04 中物院成都科学技术发展中心 A kind of light-gas gun emitter
CN108169039B (en) * 2017-11-29 2020-04-14 中国飞机强度研究所 Portable small-energy impact test device and using method thereof
CN108362169B (en) * 2018-02-07 2020-01-31 西北工业大学 kinds of launching device
CN108362168A (en) * 2018-02-07 2018-08-03 西北工业大学 A kind of emitter

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Assignee: ELECTRONIC EQUIPMENT FACTORY, ANHUI UNIVERSITY OF SCIENCE & TECHNOLOGY

Assignor: Anhui University Of Science And Technology

Contract record no.: 2011340000460

Denomination of invention: Pneumatic power bullet transmission cylinder for material dynamic performance experiment

Granted publication date: 20110504

License type: Exclusive License

Open date: 20090729

Record date: 20111214

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110504

Termination date: 20120219