Automatic small arms

 

(57) Abstract:

The invention relates to the field of military equipment and is aimed at improving an existing small arms, such as General purpose machine guns. Automatic small arms contains a box of butt, the barrel with shroud, the gas chamber, the ejector vostokovedenie channels on the trunk (for air cooling), the bolt with the bolt, paternopoli, return and trigger mechanisms. Vostokovedenie channels ejector are located symmetrically with respect to a vertical plane coinciding with the axis of the barrel, while the upper and lower edges of the barrel is wider lateral edges. Over the conical flash Hider in the ribs made the gap, and the ejector shroud is installed flush with the cut of the flame arrester. The invention reduces the dispersion of the shots (the improved accuracy of fire) when firing, reduces the average withdrawal point shots during heating of the barrel when shooting under various atmospheric conditions (rain, snow, wind), reduces the total weight load on the calculation. 4 Il.

The invention relates to the field of military equipment and is aimed at creating automatic small arms, allowing intensive shooting, nab, what about the machine, therefore, they are widely used in all armies and to ensure high performance shooting, meeting modern requirements, they are constantly evolving. For example, for our army first single machine gun was adopted the Kalashnikov machine gun (PC). Work on improvement of combat and operational characteristics of the machine gun led to a redesign of the gun PC. The modernized Kalashnikov machine gun (PKM) has a smaller mass, but the shooting mode and the dispersion of shots when shooting (accuracy of fire) remained the equivalent of a machine gun PC. Further improvement of combat and operational characteristics of the single machine guns is to improve the accuracy of fire, zoom shot of ammunition without cooling of the barrel of the gun, weight reduction wearable weapons and reduce the average withdrawal point (STP) queue from the control point according to the operation conditions (rain, wind, heat).

Known solution to these issues in the design patent of the Russian Federation [1], which is the prototype. The prototype on the section of the trunk boxes from automation to the gas chamber equipped with a gap hollow casing in which is located the screen, made in VII is the ejector shroud, and on the trunk in the area made the edges, with adjacent sides of adjacent ribs angled 90oto each other. In muzzle is made conical flash Hider, the output diameter which does not exceed the internal diameter of the thread for fastening the sleeve blank firing attachment.

The disadvantages of this design are:

- conical flash Hider made in the muzzle end of the barrel, creates an insufficient degree of expansion gases from the channels of the ejector and the threaded mounting sleeve blank firing attachment, so when shooting, there is increased flame shot;

- threaded mount on the muzzle end of the barrel (sleeve blank firing attachment) creates at the outlet of the ejector additional hydraulic resistance to flow of air, which reduces its effectiveness in cooling the barrel;

- the rigidity of the shaft in the vertical plane is reduced because of channels ejector, which affects the stability of the position of the STF when shooting with a bipod and various preload gun to the support.

The aim of the invention is to eliminate the above disadvantages and to enhance the combat and operational characteristics of the machine gun.

Ukazanoy plane, coinciding with the axis of the barrel, while the upper and lower edges of the barrel is wider lateral edges, above the conical flash Hider in the ribs made the gap, and the ejector shroud is installed flush with the cut of the suppressor.

To increase rigidity of the trunk with the ejection grooves in the vertical plane of the upper and lower edges of the barrel is wider lateral edges, which increases the moment of resistance of the trunk in a vertical plane. This circumstance has made possible to reduce the displacement of the middle point of getting regular shots depending on the efforts of the clip shot gun to the support.

From theory of calculation of ejectors is known [2] that for maximum efficiency of the ejector requires the mixing chamber gases (in this case, the powder gas and air passing through the channels of the ejector to provide maximum suction air quantity. Given that the stream of powder gases escaping from the barrel, has a high degree of Narechenski and is a high speed, the mixing chamber must be of very large dimensions (the diameter of the mixing chamber must be greater than the maximum diameter of the jet), for example, as the machine gun Lewis [3]. Wide akmah the dimensions of the muzzle part of the barrel (diameter 22-28 mm) maximum ejection of air when the shot is observed in the case if the ejector shroud is not acting for the output section of a conical flash suppressor. If the casing is within the specified cross section, the locking ejector and the powder gas enters the channels of the ejector (i.e. the inverse). When the exposure cutoff suppressor decreases the speed of the air flow through the ejector. Increase air flow through the ejector allows to increase the dissipation of heat generated on the surface of the stem and the walls of the ejector due to the increased speed washing these surfaces.

Given that the conical flash Hider with a relatively small degree of expansion of gases provides no reduction in the degree of Narechenski powder gases at the outlet to the value excludes the appearance of the flame for the direct shock wave in a flowing stream, the edges of the trunk above the conical flash Hider made the gap, which helped to eliminate the above factor.

The application of these design solutions allowed:

to eliminate the effect of the efforts of the retention of the gun when shooting from a bipod on the displacement of the middle point of hitting shots due to bending of the trunk;

to eliminate frictional resistance to gas flow at the outlet of the ejector;

to improve rhenium powder gas in conical flash Hider due to the additional discharge of the powder gases through cracks in the flame arrester and to exclude the appearance of a flame when fired.

This fact significantly reduces unmasking factors when shooting, to improve the accuracy of shooting with the bipod and the machine by increasing the rigidity of the trunk and its possible exception of pitching in connection with box.

The invention is illustrated by drawings, there is schematically shown: Fig.1 - General view of the gun; Fig.2 is a cross-section of the barrel and the ejector; Fig.3 is a cross section of the barrel in the area of the flame arrester; Fig.4 is a longitudinal section through the trunk channels ejector and slots flash suppressor.

The gun consists of a box with 1 butt 2. Inside the box 1 are paternopoli and trigger 3 mechanisms. In the box 1 is fixed barrel 4 with bipod 5, the barrel sleeve 6, the casing ejector 7 and the gas chamber 8. On the outer wall of the barrel 4 is made of ribs, between which the channels 9 of the ejector, which are located symmetrically relative to a vertical plane coinciding with the axis of the barrel; the muzzle is made conical flash suppressor 10. Over the conical flash Hider 10 made the gap 11, the side walls of which are made in the form of a conical funnel. On the outer surface of the muzzle end of the ejector 7 pressed block front sight base 12 with the two tabs on the of the present planting base bipod 13, attached bipod stand 5. The horizontal ribs of the barrel 4 is thinner than the vertical, this has allowed keeping the drag torque of the shaft in a vertical plane.

The proposed device is as follows. When fired, the powder gases out of the conical flash suppressor 10 with high supersonic speed and create a cocurrent ejecting a stream of air which flows through the channels 9 of the ejector. The air enters the ejection channels 9 through the holes in the gas chamber 8, which allows to cool the area of the venting holes of the barrel 4 and the section of the trunk between the gas chamber 8 and the extended cut. In slots 11 located above the conical flash Hider 10, plays a considerable part of the powder gas, reducing the degree of Narechenski flash suppressor to the desired value, which excludes the appearance of flames on the axis of the conical flash Hider for the direct shock wave. Powder gases discharged through the side slits 11 are expanded in conical sockets cracks, which excludes the appearance of the flame and in lateral directions.

Extensive experimental studies and tests of the gun with the proposed design solutions have shown:

- weight of plebe with bipod, located near the muzzle end of the barrel, has greater stability when shooting than at the location of the bipod to the gas chamber and the accuracy of fire improved 1.6-2.5 times;

- when shooting with machine accuracy improves shooting in 1,5-2 times;

- flame shot equivalent staff PKM machine gun.

Sources of information

1. RF patent 2090819, F 41 C 27/00, 1997.

2. G. N. Abramovich. Applied gas dynamics. M.: Nauka, 1976.

3. M. A. Mamontov. Some cases of gas flow in pipes, nozzles and flow vessels. M: Barongis, 1951.

Automatic small arms, containing a box of butt, barrel, conical flash Hider, casing and screen ejector, vostokovedenie channels which are formed longitudinal ribs on the barrel and casing, the bolt with the bolt, paternopoli and trigger mechanisms, characterized in that vostokovedenie channels ejector are located symmetrically with respect to a vertical plane coinciding with the axis of the barrel, while the upper and lower edges of the barrel is wider lateral edges, above the conical flash Hider in the ribs made the gap, and the ejector shroud is installed flush with the cut of the flame arrester.

 

Same patents:

The invention relates to the field of military technology and can be used to create effective automatic firearms, such as a single machine gun

The invention relates to a method of operation of the automatic hand firearms and to design a revolver-machine, based on this way

Fry small arms // 2179696
The invention relates to the field of small arms

Fry small arms // 2152583
The invention relates to small arms

The invention relates to weapons, namely, varieties of small weapons - grenade launchers

Gun // 2129694
The invention relates to the field of weapons and can be used for precision shooting in poor visibility conditions

The invention relates to the field of rocketry, missiles, fired ones launching tubes

Grenade launcher // 2123164
The invention relates to the field of firearms, in particular to grenade launchers, designed to prevent avalanches, landslides t

The invention relates to military technology, and in particular to devices that allow for blank firing firearms

The invention relates to the field of armaments, namely facilities small arms, primarily automatic

The invention relates to the field of military technology and can be used to create effective automatic firearms, such as a single machine gun

The invention relates to small arms

Muzzle brake // 2155309
The invention relates to Nadolny devices to reduce recoil and can be used to improve combat performance of small arms

Muzzle attachment // 2153140
The invention relates to hunting weapons, namely Nadolny devices and check nozzles

The invention relates to the field Nadolny devices and can be used in weapons to control the dispersion of the shells and bullets

The invention relates to weapons and can be used in automatic small arms

Rifled choke // 2124687
The invention relates to hand-held firearms and, in particular, can be used in hunting weapons designed to fire from the same trunk as the shot, and the bullet is stabilized in flight by rotation

The invention relates to fire-small arms and artillery weapons and equipment, in particular, to the design of barrels with a muzzle attachments and hubs

The invention relates to military technology, and in particular to devices that allow for blank firing firearms

The invention relates to weapons and equipment, in particular to the design of muzzle attachments and concentrates, and may be used in the trunks of weapons

The invention relates to the field of weapons, primarily to methods and mechanisms blowing the powder gases of the shot barrel small caliber 4,5-5,7 mm small arms to avoid damage under field conditions
Up!