RU2610790C1 - Stand for research hypervelocity impact of fine particles with barrier - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: stand for research hypervelocity impact of fine particles with a barrier involves a barreled launching device with drop points placed in its acceleration trunk and a vacuum chamber connected to it on the side of the acceleration trunk cutoff. A barrier and a bullet receiver are placed inside the chamber. Drummers are placed in easily breakable thin-walled container located at a distance of 10-15 calibers from the beginning of the acceleration trunk. The barrier is formed as a plate with a center through hole with a diameter of 5-8 acceleration trunk calibers. Samples of the material are fixed on the plate around the hole and over some distance.

EFFECT: less distortion of the target high-speed interaction with the drummers.

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Description

The invention relates to experimental equipment, namely, to stands for the study of high-speed interactions of bodies with obstacles, and can find application in studies of armored ballistics, in the development of protection of space technology from micrometeorites and space debris.

Known stand for shock tests according to the patent of the Russian Federation No. 2402004, publ. 10/20/2010, consisting of a barrel projectile launcher and a target mounted at a predetermined distance from the booster barrel. In the barrel of the projectile launcher there is a striker equipped with a rear obturator, and the total length of the obturator and striker is greater than the distance from the muzzle of the barrel to the target. The space between the drummer and the muzzle is evacuated.

A disadvantage of the known installation is the limitation of the minimum size and mass of the striker, since, on the one hand, the size of the striker and the shutter are limited by the technically achievable minimum caliber of the booster barrel, on the other hand, since the striker and the shutter affect the target, for the purity of the experiment, the mass the striker should be many times larger than the mass of the shutter.

The closest to the claimed invention in terms of technical nature and the technical result achieved is a widespread booth [1], which consists of a barrel throwing unit (pneumatic, powder or light gas gun [2]), at the beginning of the boom barrel of which there is a drummer placed in a pallet a shutter, and a vacuum path in which the device for separating the pallet from the striker, the gas cut-off chamber and the target, i.e. test sample. When a projectile is fired, the drummer with the pallet acquires the necessary speed and enters the evacuated route. There the separation of the pallet and the striker takes place, as well as the cutoff of the main mass of the working gas, after which the striker flies freely to the target and hits it.

The disadvantage of this design is the limitation of the minimum size of the drummer. In the gas stream, in addition to the projectile itself, there are other particles (fragments of the tray and separator barriers, ablation drops, fragments of the diaphragm, etc.), therefore, when using projectiles with characteristic sizes of 1 mm or less, the above particles can affect the target, comparable (and sometimes superior) to the impact of the hammer. This significantly complicates the analysis of the results of the experiment or even makes it impossible.

The task was to create a stand that allows one to study the high-speed interaction of the target with projectiles having a characteristic size of 1 mm or less, while eliminating the distortion of the interaction pattern due to the destruction of the target by other particles present during the firing of the projectile.

This problem is solved as follows. In comparison with the prototype, the stand including the barrel throwing unit and the evacuated chamber connected to it from the side of the accelerating barrel, inside of which there is an obstacle and a bullet receiver, differs in that several drummers are placed in a thin-walled easily destroyed container located at a distance of 10-15 calibres from the start of the booster barrel, and the barrier is made in the form of a plate having in the center a through hole with a diameter of 5-8 calibers of the booster barrel, while on the plate around the hole and some rum fixed distance therefrom samples of the test material.

Figure 1 shows a diagram of the proposed stand, equipped with a light-gas throwing installation in the state before the shot.

The installation consists of a compression chamber 1 connected to the booster barrel 2 and together constituting part of a light-gas throwing installation (other details of the throwing installation are not shown). The internal space of the compression chamber is separated from the channel of the booster barrel by the diaphragm 3. In the channel of the booster barrel at a distance of 10-15 calibres from the diaphragm there is a container with drums 4. The booster barrel is connected to the vacuum path 5, inside which there is a plate (target) 6. In the center the target has a through hole 7 with a diameter of 5-8 calibers, around which at a certain distance from the edge of the hole are fixed samples of the test material 8. Next, a bullet trap 9 is fixed in the chamber.

An example embodiment of the invention.

Before the shot, the axial line of the accelerating barrel 2 of the gas installation is aligned with the center of target 6. During the shot, the working gas pressure in the compression chamber 1 increases until the diaphragm 3 is destroyed, after which the working gas begins to flow into the accelerating barrel 2. When passing the distance equal to 10-15 calibers of the booster barrel 2, the working gas acquires high speed in the laminar flow regime. The perturbations arising during the breakthrough of the diaphragm 3 die out. The gas flow strikes the container with the projectiles 4, destroys it and carries the projectiles, dispersing them along the accelerating barrel 2. Leaving the accelerating barrel 2 into the evacuated route 5, part of the working gas with the projectiles suspended in it expands in the radial direction, giving the projectors some radial component speed, and they hit samples of the studied material 8 located on the target 6 at some distance from the line of sight. In this case, the main gas flow passes into the central hole 7, without interacting with the samples of the studied material 8, and other particles present in the gas stream (fragments of the diaphragm, ablation drops, etc.), being heavier than the impactors, deviate slightly from the aiming line and also pass through the central hole 7, trapped further by a bullet trap 9.

The proposed stand provides a clear picture of the interaction of small projectiles with samples of the material under study, eliminating the damage of the sample by other particles present in the gas stream during the firing of the projectile. In addition, this stand allows you to conduct an experiment simultaneously with several samples of the studied material, including various nature, which significantly reduces the required number of experiments, thereby reducing the cost of research.

The proposed technical solution passed an experimental test, which confirmed its performance. The technical result of the invention is to reduce the distortion of the picture of high-speed interaction of the target with projectiles having a characteristic size of 1 mm or less.

Literature

1. Theoretical and experimental studies of high-speed interaction of bodies / ed. A.V. Gerasimova. - Tomsk: Publishing house Tom. University, 2007, p. 143.

2 Zlatin N.A., Krasilshchikov A.P., Mishin G.I., Popov N.N. Ballistic installations and their application in experimental studies. - M .: Nauka, 1974, - p. 18-35.

3. RF patent No. 2402004.

Claims (1)

A stand for studying high-speed collision of small particles with an obstacle, including a barrel throwing system with drummers placed in its accelerating barrel and an evacuated chamber connected to it from the side of the accelerating barrel, inside of which there is an obstacle and a bullet receiver, characterized in that the projectiles are placed in a thin-walled easily destroyed container located at a distance of 10-15 calibers from the start of the booster barrel, and the barrier is made in the form of a plate having a diameter through hole in the center m 5-8 calibers of the booster barrel, on which samples of the material under study are fixed around the hole and at a certain distance from it.

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