RU2460957C1 - Hand-held grenade launcher - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: grenade launcher comprises launching tube, engine, barrel, grenade pulled to engine bottom by tensioning device arranged at engine front bottom and made up of screw with shaped head. Load-bearing washer made from material with strength depending upon initial ambient temperature is arranged between engine front bottom and tensioning device to thrust against front bottom. Said tensioning device has gas discharge channel communicating engine chamber with chamber between grenade and engine.

EFFECT: lower temperature dependence of grenade muzzle velocity.

2 dwg

Description

The present invention relates to the field of weapons and can be used in the development of portable disposable recoilless grenade launchers and takes into account the increasing requirements to improve the stability of their work and design perfection.

Known manual grenade launcher (patent for invention No. 2247914 dated 03/10/2005), containing a launch tube-container, engine, barrel, grenade pulled to the front bottom of the engine by a tensioner, a tubular powder charge and an additional powder charge placed inside a steel chamber. The prechamber is made in the form of a thin-walled tube with an inner ring stop at the end and gas holes and is installed in the front bottom of the engine. A pre-tensioner in the form of a screw with a cylindrical head, with an annular collapsing element with a diameter equal to the inner diameter of the thin-walled tube and an outer diameter of the cylindrical head smaller than the inner diameter of the annular stop of the thin-walled tube, is installed on the annular stop on the screw head in the same plane as the gas holes the tubes are made of gas grooves.

This design of a hand grenade launcher has several advantages: a failure-free launch, increased speed and sighting range of a grenade, the stability of the brush charge. The design of the engine and the separation mechanism of the grenade prevents the breakdown of the powder tubes, which ensures their complete combustion and prevents the loss of traction impulse and, as a consequence, the speed of the grenade.

However, for all its advantages, the design has a significant drawback, namely, the magnitude of the dispersion of the initial grenade speed in the operating range of operating temperatures can reach significant values, which will lead to a decrease in firing accuracy.

The task of the invention is to eliminate the above drawback, namely reducing the temperature sensitivity of the initial speed of the grenade.

The solution to this problem is achieved by the fact that in a hand grenade launcher containing a launch tube-container, an engine, a barrel, a grenade pulled to the front bottom of the engine by a tensioner, which is a screw with a shaped head, between the front bottom of the engine and the tensioner with an emphasis in the front bottom is installed a power washer made of a material having a dependence of strength properties on the initial ambient temperature (for example, polyethylene). A gas channel is made in the tensioner, connecting the engine cavity with the volume between the grenade and the engine. The essence of the invention lies in the fact that this design of a hand grenade launcher provides a small dispersion of the initial speed of the grenade depending on the operating temperature due to the use of temperature separation in the material separation mechanism.

The use of a material with the dependence of strength properties on temperature allows you to adjust the level of pressure accumulated in the cavity between the engine and the grenade. At low temperatures, the material of the power washer has higher strength, which leads to an increase in its shear force, which in turn allows a higher pressure level to be accumulated in the cavity between the engine and the grenade, thereby increasing the speed of the grenade after separating it from the engine. At positive temperatures, due to a drop in the strength of the power washer material, the pressure level in the cavity between the engine and the grenade decreases, which leads to a decrease in speed. This ensures a small variation in grenade speed depending on the operating temperature.

The design of the tensioner allows a smooth flow of gas into the free volume behind the grenade after cutting the power washer due to the profiling of the screw head (for example: making through longitudinal grooves on the cylindrical screw head).

Figure 1 shows the proposed design of a hand grenade launcher, figure 2 shows the design of the tensioner, where:

1 - launch tube-container;

2 - grenade;

3 - trunk;

4 - front bottom of the engine;

5 - engine housing;

6 - powder charge;

7 - adapter with a blank bottom;

8 - initiator;

9 - igniter;

10 - power washer;

11 - a tensioner;

12 - gas (prechamber) tube;

13 - gas channel.

The operation of the grenade launcher is fleeting, and if we consider the process of launching a grenade in time, this process is carried out as follows. When you press the trigger, the initiator 8 of the jet engine is activated, installed in the adapter 7, the powder gases from the initiator ignite the igniter 9, installed in front of the nozzle block of the engine. The powder gases from the igniter ignite the main powder charge 6, installed around the gas pipe 12 in the front bottom of the engine 4, based on the annular ledge of the engine casing 5.

Powder gases from the combustion of the main powder charge, rushing through the nozzle block into the atmosphere create reactive thrust. At the same time, part of the powder gases generated from the combustion of the main powder charge flows through the gas holes into the gas pipe 12 and then through the gas channel 13 of the tensioner 11 fills the cavity between the engine and the grenade.

In this case, the counter mass, consisting of the body of the engine 5 and the barrel 3 attached to it and the grenade 2, under the action of the thrust of the jet engine starts moving forward relative to the launch tube-container 1. At the same time, the pressure in the cavity between the engine and the grenade increases.

When the critical design pressure is reached, the calibrated power washer 10 is cut by the shaped head of the tensioner 11, which pulls the grenade to the front bottom of the engine 5, i.e. there is a separation of the grenade from the engine.

Due to the profiling of the tensioner head, a smooth set of pressure is achieved in the cavity between the grenade and the engine. In this case, the grenade rushes forward along the barrel, having received additional speed, and the counter-mass is braked and loses speed, remains in the launch tube or drops out of the launch tube-container with a minimum speed.

The execution of the tensioner in the form of a screw with a profiled head, under which the power washer is installed, provides automatic adjustment of the design force of separation of the grenade with the anti-mass, since the material of the power washer has a dependence of the strength properties on the initial ambient temperature, which allows the grenade to have a small dispersion of the initial speed depending on operating temperature.

Claims (1)

A hand grenade launcher comprising a launch tube-container, an engine, a barrel, a grenade pulled up to the front bottom of the engine by a tensioner made in the form of a screw with a cylindrical head, characterized in that the screw head is shaped, between the front bottom of the engine and the tensioner, with emphasis on the front bottom there is a power washer made of a material with a dependence of the strength properties on the ambient temperature, a gas duct is made in the tensioner connecting the engine cavity with the volume between the grenade and the engine Thelema.

Images