RU195554U1 - Mortar shell - Google Patents

Abstract

The proposed utility model relates to military equipment and can be used to defeat manpower and lightly armored vehicles. Mortar shell containing a drop-shaped body with a chamber for a bursting charge, a bursting charge, a contact fuse and a detonator located in the head of the mortar shell, stabilizers located in the tail of the mine, characterized in that longitudinal and transverse grooves with a semicircular transverse are made on the body section. The technical result is to reduce the dispersion field of the mortar shell, due to the fact that the laminar air flows, due to the Coanda effect and the tunnel effect, will reach the area between the stabilizers, as well as the regulation of its fragmentation, giving the fragments a predictable shape, due to the appearance of voltage concentrators in the areas created grooves. 1 ill.

Description

The proposed utility model relates to military equipment and can be used to defeat manpower and lightly armored vehicles.

Known mortar shell O-832 (publishing house of MSTU named after NE Bauman "Means of destruction and ammunition"), consisting of the following parts: a steel drop-shaped body with a chamber for a bursting charge, a bursting charge located inside the chamber, six stabilizers located in the tail of the mortar shell, detonator and fuse OM-82 located in the head of the mortar shell.

However, in the mortar shell indicated, the fragmentation has an insufficient lesion field, and the mine has a large dispersion field due to insufficient stabilization inside the bore and on the trajectory.

In addition, a mortar shell is known which is the prototype of the declared mortar shell - O-832D (publishing house of MSTU named after NE Bauman "Means of destruction and ammunition"). The mortar shell consists of a drop-shaped body with a chamber for an explosive shell, explosive charge, stabilizers located in the rear of the mortar shell, detonator and fuse OM-82 located in the head of the mortar shell.

However, in said mortar shell, the fragmentation has an insufficient lesion field, and the mine has a large dispersion field due to insufficient stabilization inside the bore and on the trajectory.

The objective (technical result) of the proposed utility model is to reduce the dispersion field of a mortar shell, in addition, fragmentation control is achieved by creating the effect of a given crushing.

This object is achieved in that the mortar shell containing a drop-shaped body with a chamber with a bursting charge, a contact fuse and a detonator located in the head of the mortar shell, stabilizers located in the rear of the mortar shell, characterized in that the housing is made longitudinal and transverse grooves with a semicircular cross section.

The drawing shows the proposed mortar shell. The proposed mortar shell contains a contact fuse (1) and a detonator (6) located in the head of the mortar shell, a bursting charge (2), a drop-shaped body with a chamber for a bursting charge (3), stabilizers (4) located in the rear part longitudinal (5) and transverse (7) grooves. The housing may be made of cast iron. Bursting charge consists of initiating and blasting explosives

Mortar shell operates as follows. The longitudinal grooves on the mine shell (5) have a semicircular cross-sectional shape with a radius of 0.01 to 0.3 mm, the shape was chosen from the calculations:

Laminar Airflow Condition: Re≤2300

гдеThe equation for laminar flow:

Where

ν is the air velocity,

A - flow area, m ²

L - perimeter, m

. Для воздуха

ϑ - kinematic viscosity,

. For air

ν in the mortar =

тогда:

Let be

then:

Где

Choose a semicircular section, then:

Where

This condition is necessary to create a laminar air flow inside the groove, which due to the tunneling effect will reach the area between the stabilizers, thereby reducing the oscillations of the mortar shell in the bore and increasing its stability on the trajectory. The transverse grooves also have a semicircular cross section, but with a smaller radius. Grooves will be added to the mine’s body by changing the mold. Since the stress concentrators will create the grooves, a combination of longitudinal and transverse grooves allows you to adjust the fragmentation of the mortar shell by creating the effect of a given crushing.

The technical result is to reduce the dispersion field of the mortar shell, due to the fact that the laminar air flows, due to the Coanda effect and the tunnel effect, will reach the area between the stabilizers, as well as the regulation of its fragmentation, giving the fragments a predictable shape, due to the appearance of voltage concentrators in the areas created grooves.

Claims (2)

1. Mortar shell containing a drop-shaped body with a chamber with a bursting charge, a contact fuse and a detonator located in the head of the mortar shell, stabilizers located in the rear of the mortar shell, characterized in that longitudinal and transverse grooves with a semicircular transverse are made on the body section. 2. A mortar shell according to claim 1, characterized in that longitudinal and transverse grooves with a semicircular cross-section with a radius of 0.01 to 0.3 mm are made on the body.

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