A light gas cannon launching device

Abstract

The invention relates to a light gas gun launcher which includes a launch tube; a launch component, a gas storage component and a gas supply component, the launch component includes a launch cavity, a first gas guiding channel and a second gas guiding channel, the launch cavity is used for setting a projectile, the first gas guiding channel is communicated with the launch cavity, and evenly guides a gas to the side wall of the projectile, the second gas guiding channel is communicated with the launch cavity, and guides the gas to the end wall of the projectile, the launch cavity is connected with the launch tube, the gas storage component is communicated with the first gas guiding channel, the gas supply component comprises a first pipe and a second pipe, the first pipe is communicated with the first gas guiding channel, the second pipe is communicated with the second gas guiding channel, and the first pipe and the second pipe are respectively connected with a gas source. The light gas gun launcher has the advantages of simple structure and clear principle, the controllability of an electromagnetic valve type launch system and the high efficiency of a membrane rupture launch system are combined, and compared with the prior art, the light gas gun launcher has a great breakthrough in launching pressure, result errors are smaller, and working efficiency is higher.

Description

technical field [0001] The invention relates to the field of impact dynamics, in particular to a light gas cannon launching device. Background technique [0002] With the development of modern impact dynamics and material science, more stringent requirements are put forward for the loading method of materials. The gas cannon, especially the improved small light gas cannon, uses compressed gas as the power source to drive the projectile to hit the sample at an ultra-high speed (0-1000m / s), so as to achieve ultra-high strain rate loading of the material. With this feature, gas cannons are widely used in spacecraft protection research, geophysical research, kinetic energy weapon research and other fields. [0003] At present, common light gas cannon experiment systems mostly adopt membrane rupture and solenoid valve launch systems. Membrane-breaking launch is to place a pre-prepared diaphragm with a known rupture pressure on the rear end of the bullet and fix it, and then pre...

AI Technical Summary

Problems solved by technology

[0005] The ruptured membrane launch system can obtain a relatively large initial launch pressure, but its membrane rupture pressure can only be determined by the diaphragm; the experimental gas filling pressure is limited by the diaphragm, which makes it difficult to control the speed of the bullet, and it is difficult to design pressure-velocity continuous. In addition, most of the diaphragms are aluminum sheets, which inevitably cause scratches and other defects on the surface during processing, and diaphragms of the same material may have different defects inside, resulting in the same material and the same type of defects. The membrane rupture pressure of the thickness of the diaphragm is different, and the speed of the bullet is also different.

In addition, the ruptured diaphragm is easy to fall off and flies forward together with the projectile, causing uncertainty in the flight launch quality, and the metal diaphragm is easy to damage the inner wall of the expensive gun barrel under high-speed flight

These defects make it difficult for experimenters to design experiments with precise experimental speed and safe and reliable experimental process.

[0006] Solenoid valve launch system, in order to improve the response speed, its internal gas path is usually small, and the opening speed is relatively slow. At the same time, due to the limitation of electromagnetic force, it is difficult to achieve a high-pressure solenoid valve with a large diameter. The pressure drop at the rear end of the bullet is obvious, resulting in a large difference between the actual launch pressure and the applied air pressure, and the gas cannot quickly release all potential energy

The electromagnetic valve launch system is suitable for experiments with low gas filling pressure, but it will cause large errors in experiments with high gas pressure

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