RU2653107C1 - Stand for investigation of high-speed collisions - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to propulsion systems for investigating high-speed collisions. Stand for the investigation of high-speed collisions contains a propulsion system, device for separating the pallet from the body being thrown and a vacuum path consisting of successively located and connected discharge compartments of the working gas flowing from the propulsion system, provided with at least one jet of working gas, and a vacuum chamber with a target. Reflectors of the working gas jet are installed in the working gas discharge chamber at an angle to the longitudinal axis of the stand and are provided with holes for the passage of the projected body. On the side surface of the working gas discharge chamber, a window is closed, closed by a film diaphragm, which is destroyed by the action of the working gas pressure. Film diaphragm can be placed between the two openings of the working gas discharge chamber installed on the window.

EFFECT: technical result of the invention is to simplify the operation of the stand and to increase the reliability of the information obtained in the experiment.

1 cl, 5 dwg

Description

The invention relates to a testing technique. The predominant area of use is the study of high-speed shock phenomena.

Studies of high-speed shock phenomena are carried out, as a rule, with the use of barrel throwing systems. The throwing body, placed in the lead tray, accelerates in the barrel of the throwing unit, is separated from the tray and loads the target under study. Acceleration of the missile body and its subsequent flight to the collision with the target should take place in a vacuum, since when moving in air, the missile body intensively loses speed and heats up to high temperature, as a result of which its shape and mass change. In addition, the impact on the target of both the pallet and the working gas flowing out of the barrel of the propellant installation should be excluded.

A well-known stand for the study of high-speed collisions, a description of which is given in the book of N.A. Zlatina and G.I. Mishina “Ballistic installations and their application in experimental research”, publishing house “Nauka”, Moscow, 1974, p. 43. The stand consists of a throwing installation (light-gas gun) and a vacuum track. The latter consists of a discharge compartment, in which the main delay of the working gas occurs, as a rule, of hydrogen flowing out of the barrel of a light-gas gun, a pipe where the velocity of the missile is measured, and a vacuum chamber in which the target to be studied is placed.

The disadvantages of this stand include:

- the possibility of passing into the vacuum chamber part of the working gas flowing out of the propellant installation and its impact on the target;

- the need to purge the discharge compartment with inert gas in order to prevent the formation in its confined space of an explosive concentration of a mixture of hydrogen with air.

The well-known "Stand for the study of high-speed collisions", patent of the Russian Federation No. 2289774 F41F 1/00 (2006.01), publ. 12/20/2006, bull. No. 35, selected as a prototype. The stand comprises a throwing unit and a vacuum route, consisting of a sequentially arranged and connected by transitional devices compartment for the discharge of working gas from the throwing unit with a tray cutter and a vacuum chamber with a target installed at the outlet of it. The working gas discharge compartment is made of easily destructible non-fragmentation material, a device for separating the pallet from the missile body is fixed at the entrance to it, and a gas jet reflector is placed before entering the vacuum chamber.

The disadvantages of this stand include:

- the need to replace after each experiment the compartment discharge of the working gas, made in the form of easily destroyed pipe;

- the possibility of passing into the vacuum chamber part of the working gas flowing out of the propellant installation and its impact on the target, since the working gas discharge compartment (pipe) until its destruction inhibits the spreading of the working gas flow in the radial direction and directs it along the axis of the bench.

The technical task to be solved is the creation of a bench for the study of high-speed collisions, when setting up experiments on which its operation is simplified and the passage of working gas flowing out of the propellant installation into the vacuum chamber and its impact on the target are excluded.

The expected technical result is to increase the reliability of the information obtained in the experiment.

The technical result is achieved through the use of a test bench for research of high-speed collisions containing a throwing device, a device for separating the pallet from the throwing body and a vacuum route, consisting of sequentially located and connected discharge compartment of the working gas flowing out of the throwing installation, equipped with at least one jet reflector working gas, and a vacuum chamber with a target. Reflectors of the working gas jet are installed in the discharge compartment of the working gas at an angle to the longitudinal axis of the bench and are equipped with holes for the passage of the missile body. A window is closed on the side surface of the working gas discharge compartment, which is closed by a film diaphragm, which is destroyed by the pressure of the working gas. The film diaphragm can be placed between two plates with holes mounted on the window of the working gas discharge compartment.

A comparative analysis of the proposed stand for the study of high-speed collisions and the prototype shows that the inventive stand differs from the prototype in the totality of the following new design features:

- reflectors of the working gas jet are installed in the discharge compartment of the working gas at an angle to the longitudinal axis of the bench;

- reflectors of the jet of working gas are provided with holes for the passage of a missile;

- a window closed by a film diaphragm is made on the side surface of the working gas discharge compartment;

- the film diaphragm is made destructible by the pressure of the working gas;

- a film diaphragm is placed between two plates with holes mounted on the window of the working gas discharge compartment.

The placement of the working gas jet reflectors in the working gas discharge compartment at an angle to the longitudinal axis of the test bench ensures that the throwing body located in the compartment of the jet flowing out of the propellant installation is removed from the flight path of the propellant.

The supply of working gas jet reflectors with openings for the passage of a missile body allows the latter to freely pass into the vacuum chamber to collide with the target.

The execution on the side surface of the working gas discharge compartment of a window closed by a film diaphragm allows one to separate the internal path of the stand from the atmosphere with the possibility of its evacuation.

The implementation of the film diaphragm is destroyed under the influence of the pressure of the working gas provides its release into the atmosphere.

Placing the film diaphragm between two plates with holes installed on the window of the working gas discharge compartment ensures the safety of the film diaphragm with large window sizes when exposed to atmospheric pressure and its destruction by the pressure of the working gas flowing out of the compartment, significantly exceeding atmospheric pressure.

The invention is illustrated by figures. In FIG. 1 shows a side view of the stand, in FIG. 2 is a top view of the stand, in FIG. 3 - a missile body in the pan when exiting the barrel of a missile launcher; in FIG. 4 is a fragment of plates with a film diaphragm placed between them; in FIG. 5 - throwing body in front of the reflector of the jet of working gas.

The test bench for high-speed collisions contains a throwing unit 1, a device 2 for separating the pallet from the throwing body and a vacuum route 3. The vacuum route 3, in turn, consists of a compartment 4 for discharge of the working gas flowing out of the propellant system and a vacuum chamber 5. Compartment 4 for discharge of the expiring from a propellant installation of the working gas is a tank with gas jet reflectors 6 placed at an angle to the longitudinal axis of the bench, provided with openings 7 for the passage of the missile body 8. On the side surface and compartment 4, a window 9 is made, closed with a film diaphragm (for example, lavsan film) 10, while the film diaphragm can be placed between two plates 11 with openings 12 installed on the window 9 of the working gas discharge compartment 4.

The stand for the study of high-speed collisions works as follows. Before the shot (see Fig. 1) through the nozzle 13, placed in the vacuum chamber 5, the internal path of the stand is evacuated, so that the loss of its speed and heating are eliminated over the entire flight distance of the missile body 8. When a shot is fired before entering the discharge compartment 4 of the discharge of the working gas flowing out of the propelling unit, the propelled body 8 is separated from the pallet 14 by the device 2 (see Figs. 1 and 3). Throwing body 8, continuing its flight through compartment 4 and holes 7 in reflectors 6 (see Fig. 5), enters the vacuum chamber 5 and interacts with target 15, and fragments 16 of the destroyed pallet 14 having a radial velocity component are delayed by reflectors 6 The jet of working gas flowing from the barrel of the throwing unit 1 into the compartment 4 (see Figs. 1, 2 and 4) is deflected by the reflectors 6 towards the window 9, destroys the film diaphragm 10 and expires into the atmosphere, The proposed stand has significant positive qualities in relation to the prototype, p allowing simplify its operation and increase the reliability of the information obtained in the experiment due to the exclusion of the passage of the working gas flowing out of the propellant into the vacuum chamber and its impact on the target.

Claims (2)

1. A test bench for researching high-speed collisions, comprising a propelling device, a device for separating the pallet from the propelled body and a vacuum path, consisting of series-connected and connected discharge compartments of the working gas flowing out of the propelling system, equipped with at least one working gas jet reflector, and vacuum chamber with a target, characterized in that the reflectors of the working gas stream are installed in the discharge compartment of the working gas at an angle to the longitudinal axis of the bench and are provided with openings for passage and a throwable body, on the side surface of the working gas discharge compartment, a window is made that is closed by a film diaphragm, which is destroyed by the pressure of the working gas. 2. A bench for research of high-speed collisions according to claim 1, characterized in that the film diaphragm is placed between two plates with holes installed on the window of the working gas discharge compartment.

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