The barrel of the automatic weapon

 

(57) Abstract:

Use: trunks automatic guns and machine guns intensive ejection of ammunition. The inventive barrel includes an inner tube and casing, dressed with tension. In the inner pipe is made of the cooling unit in the form of cavities with inserts on the outer surface and located between the cooling channels, which are used vapor-liquid refrigerant, which improves the shooting mode or survivability. 1 C.p. f-crystals, 3 ill.

The invention relates to the field of military technology and can be used in the trunks of automatic guns and machine guns intensive ejection of ammunition.

Wear rifled part of the barrel automatic weapons is a factor limiting the firing modes and determining the survivability of the trunk. Increase firing modes is dictated by the requirements of effective targets. And increase the survivability of the barrel caused by economic reasons and ease of maintenance of the weapons in the army. One of the most effective ways to meet the requirements for these options is the creation of a multi-layered barrels, i.e. barrels, consisting of an inner tube and casing. Under internal terrasol the bore (see GOST 20134-84). Barrel shroud artillery guns are single-layered or multi-layered membrane covering the inner tube. Particular cases of the inner tube are Leiner and planiruyushaya sleeve. The liner artillery or a free tube is the inner tube of multilayer barrel inserted into the casing with a certain gap and overlapping the casing along its entire length (B. C. eagles. Device and designing trunks artillery guns. M. engineering, 1976, S. 37). Planiruyushaya sleeve portion of the inner tube of the barrel artillery inserted into the barrel on the site subject to increased wear. Planiruyushaya sleeve used in the barrels of guns R-23, R-23AM

Famous barrel design (application France N 1157227, CL F 41 D 11/20, 1958), which contains an inner tube with rifling, the cooling unit, the casing, and the internal pipe beneath the site with the rifling made cavity in which are located the insertion of the cooling unit in a confined space, and on the outer surface of a casing provided with channels for air cooling. Moreover, insertion of the cooling unit can be made of a material undergoes when heated, one or two endothermic transformations, i.e. transitions from solid staple. In addition, the insert can be made of material with high thermal diffusivity. This design is well-cools the rifling of the barrel. However, it is ineffective in the removal of heat from the barrel to the atmosphere. This is because the barrel has an external air cooling, since the channels are located on the outer surface of the casing. The slow release of heat from the barrel to the atmosphere affects thermal stability of the complex "gun cartridge". The problem of heat resistance limits the shooting mode.

The aim of the present invention is to provide a design-tech, cheap, heat-resistant barrel with a high shooting mode or survivability.

This goal is achieved by the fact that the inner tube has a cavity above the initial section of the grooves in which are located the insertion of the cooling unit. The inserts can be vysokoteploprovodnyh or vysokoenergoemkoe relative to the barrel steel. The outer pipe (casing) is wearing on the inside in the area of location of the cavities with inserts and contacts with them. Moreover, the channel layer of the liquid-vapor cooling flow between the cavities. The bonding of the inner and outer pipes with tension compensates for the weakening of the strength of internal the STI from rifling provides them with intensive cooling during turns due to the redistribution of heat in the barrel, which improves the shooting mode or survivability. Insertion of vysokoteploprovodnyh (vysokonapornogo) metal are only in the initial part of the rifling, which significantly reduces the cost of the barrel compared to the prototype by reducing the consumption of expensive metal. Manufacturability is achieved in that the cavity in the inner pipe is made of only one fungal cutter. This allows for high processing performance is acceptable purity of the bottom surface of the cavity, through which the heat transfer. The selection of the radius of the fungal cutters successfully provided the rounding of the profile ends of the rifling. The implementation of the cavities in parallel to the axis of the barrel grooves allows the use of CNC machines. A small number of cavities (grooves) is fast enough to collect the inner tube with inserts. All this leads to the use of simple equipment and does not require workers of high qualification.

In Fig. 1 shows the proposed barrel automatic weapons, and Fig. 2 barrel shown without housing, which more clearly shows the arrangement of the channels interlayer vapor-liquid cooling, and Fig. 3 cross-section B-B in Fig. 2.

Immediately the m In addition, the barrel contains a cooling unit consisting of two elements: inserts from vysokoteploprovodnyh material and the liquid-vapor system. The purpose of the inserts 3 cooling unit to intensify the process flow of heat from the inner layers of the trunk to the outside, thereby cooling the rifling in the process queue, giving rise firing modes or survivability. The purpose of the liquid-vapor system providing heat resistance cartridge by heat with the refrigerant (water vapor) from the outer layers of the trunk and putting it into the atmosphere. Vapor-liquid system consists of a displacement of the location of the water 17, the limited jacket 4, the flange 9, the casing 2. Rubber rings 14, 15, 16 seal volume 17. Inside volume 17 on the stem has a valve device consisting of a valve body 5, the ball 6, the spring 7. The purpose valve device providing output vapor-liquid mixture after heating in the process of shooting from volume 17 into the atmosphere through the opening 8, the groove 11, the channel layer of the liquid-vapor cooling 12. Fixing the jacket 4 and the flange 9 on the barrel is a breech ring 13 and the contactor 10. Fixing the casing 2 on the inner pipe 1 is carried out by the pin 18.

Does the ability of the inner pipe 1 is heated. Insert 3 of the knot cooling heat transfer from the surface of the bore of the casing 2, which gives off heat to the liquid in volume 17. Upon reaching a certain pressure in the volume 17, formed from the boiling liquid, the ball 6 will compress the spring 7, thus between the ball 6 and the valve body 5, a gap, which will be vapor-liquid mixture from volume 17 in the direction of the arrow And through the opening 8 in the input ring protacio 11 and further through the channels 12.

At the present time there is a new barrel steel NB-W, which is embedded in the trunks of GSH-30 (AO-17). This steel is designed to improve shooting mode or survivability compared to the old steel barreled HINFO about half. The improvement of the characteristics is due to the slower fall of the strength of the new steel with increasing temperature. Currently, work is underway to implement this steel cannon GSH-301 (9-a-C). However, stems from the old barrel steel HINFO made and is in military warehouses lot. The example of the barrel in this application refers to the variant of modernization of the trunk of an old barrel steel. However in the future it is planned to equip the trunks of the new barrel steel NB-W stawk what about the vapor-liquid cooling will be performed somewhat differently. Therefore, in the claims the sign about the location of the channel layer of the liquid-vapor cooling recorded in item 2.

Furthermore, paragraph 3 of the formula is dependent, because the inserts can be vysokoteploprovodnyh or vysokoenergoemkoe.

1. The barrel of the automatic weapon, containing an inner tube with rifling, the housing, the cooling unit made in the form of cavities with inserts on the outer surface of the inner tube and cooling channels, characterized in that it cooling channels are located in the inner tube between the cavities with inserts.

2. The trunk under item 1, characterized in that the cooling channels used vapor-liquid refrigerant.

 

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