RU2848868C1 - Device for studying the cooling intensity of the barrel of an artillery gun - Google Patents

Abstract

FIELD: weapons.

SUBSTANCE: device for studying the cooling intensity of an artillery gun barrel contains a temperature measurement unit fixed to the outer surface of the barrel body. The measuring unit is based on a microcontroller and equipped with first and second measuring inputs, to which a strain gauge sensor is connected to record the moment of firing based on the vibration of the barrel body, and a resistive temperature sensor to measure the temperature of the barrel before and after firing. The measuring inputs of the unit are connected to the lines of the microcontroller's analogue-to-digital converter, and a radio module is connected to the output of its universal synchronous-asynchronous transceiver, designed with the ability to transmit telemetry information to a remote automated process control system.

EFFECT: ensuring the ability to record the moment of firing based on the vibration of the barrel body and measuring the barrel temperature before and after firing a projectile, the ability to measure the barrel temperature, the ability to transmit telemetry information to a remote automated process control system.

5 cl, 3 dwg

Description

The invention relates to gun barrel cooling systems and can be used to prevent overheating of the artillery barrel bore and improve the reliability of its operation.

A cooling system for gun barrels is known from the prior art (RU2531664C2, IPC F41A 13/00, F41A 13/04, published 10/27/2014), having a barrel and a bolt, wherein the system is additionally equipped with a piston compressor, single- or double-acting, the connecting rod of which is movably connected at one end to the bolt or bolt carrier, and at the other end to the piston by means of a pin, and the receiver is connected by an exhaust valve to the compressor cylinder, the air duct of the receiver is directed into the chamber of the barrel bore.

The disadvantage of the known system is its low technological effectiveness, due to the complexity of the system’s design and the need to change the design of the gun barrel.

The closest technical solution to the claimed invention and the prototype chosen was a cooling device for artillery barrels (RU2583989C2, IPC F41A 13/00, published August 27, 2015). The device is designed to be positioned in the barrel between the projectile and propellant charge, and it can form a thin, cooling, sublimating coating on the inner surface of the barrel upon firing.

The disadvantage of the known technical solution is the low efficiency of cooling the artillery barrel with its help.

The technical problem that the claimed invention is aimed at solving is to ensure the possibility of measuring the temperature of the barrel when a projectile is fired.

The said problem is solved in that the device comprises a temperature measurement unit secured to the outer surface of the barrel casing, wherein the measurement unit is implemented on the basis of a microcontroller, provided with first and second measurement inputs, to which are connected a strain gauge for recording the moment of firing based on the vibration of the barrel casing and a resistive temperature sensor, allowing for measuring the temperature of the barrel before and after firing; wherein the measurement inputs of the unit are connected to the lines of the analog-to-digital converter of the microcontroller, and a radio module, configured with the possibility of transmitting telemetry information to a remote automated process control system, is connected to the output of its universal synchronous-asynchronous transceiver.

A positive technical result, achieved by the device's combination of features—specifically, strain gauge and resistive temperature sensors connected to the temperature measurement unit's measurement inputs—is the ability to record the firing moment based on barrel vibration and measure the barrel's temperature before and after firing. Additionally, a radio module connected to the microcontroller's universal synchronous-asynchronous transceiver enables the transmission of telemetry data to a remote automated process control system (registration system).

The invention is explained by drawings, where Fig. 1 shows an artillery shell from the side in section with a cooling device installed in its cartridge case; Fig. 2 shows the cooling device from above; Fig. 3 shows a diagram of cutting out holes on the body of the device.

The design of the artillery gun barrel cooling device is as follows. It comprises a toroidal thin-walled metal housing 1 with a wall thickness of 0.5 to 2 mm, inside which a toroidal container 2 is placed, preferably made of polyethylene and filled with a cooling liquid 3, which may be an antifreeze liquid, such as ethylene glycol or propylene glycol, and the device is configured to be installed on the bottom 4 of an artillery projectile 5. On the upper surface of the housing, holes 6 are uniformly cut along the radius, located at an angle A1 of 15˚ to 75˚ relative to each other to the vertical axis of the housing, while the holes are made by punching at an angle A2 of 7˚ to 30˚ to the surface of the housing 1.

Additionally, for the purpose of studying the intensity and efficiency of artillery barrel cooling, the device may be equipped with a post-firing temperature measurement unit (not shown in the figures) mounted on the outer surface of the barrel casing. The unit is based on a microcontroller and has first and second measuring inputs, implemented using operational amplifiers, to which a strain gauge is connected for recording the firing moment based on the vibration of the barrel casing and a resistive temperature sensor, allowing for measuring the barrel temperature before and after the firing. The measuring inputs of the unit are connected to the lines of the analog-to-digital converter of the microcontroller, and a radio module is connected to the output of its universal synchronous-asynchronous transceiver for transmitting telemetry information to a remote automated process control system for conducting a controlled experiment (a recording system), implemented using a microprocessor system, which may be a personal computer with a radio module maintaining a wireless communication channel with the temperature measurement unit.

The additional unit discussed above will provide the opportunity to conduct controlled experiments to study the efficiency of the barrel cooling device.

The barrel cooling device of an artillery gun works as follows.

In the initial state before firing, the coolant 3 in the toroidal container 2 is located inside the thin-walled metal casing 1 at atmospheric pressure and temperature. When firing, the primer 7 ignites the artillery tubular gunpowder 8, at which point the thin-walled metal casing 1, mounted on the bottom 4 of the cartridge case, is filled with combustion products through the openings 6, the pressure in it increases and the toroidal container 2 is destroyed. Simultaneously, the coolant 3, entering the internal cavity of the thin-walled metal casing 1 from the destroyed container 2, is saturated with powder gases. After the projectile leaves the barrel bore, the powder gases begin to flow out and the pressure in the barrel decreases to atmospheric: from ~400 - 500 MPa to ~0.1 MPa. At this point in time, a boiling and flow of finely dispersed suspension formed by drops of cooling liquid 3 and particles of gunpowder 8 occurs from the openings 6 in the thin-walled metal body 1. Coming out through the openings 6, the flow of suspension swirls counterclockwise (Fig. 2) and is distributed along the perimeter of the sleeve, forming a cooling cloud that comes out of the sleeve, under the action of centrifugal force is pressed against the walls of the gun barrel, providing its intensive cooling.

When using a post-firing temperature measurement unit as part of the device, the unit is pre-mounted on the outer surface of the artillery barrel and a wireless communication channel is established via a radio module with a remote automated process control system for conducting a controlled experiment to study the effectiveness of barrel cooling using the device. Upon firing, the measurement unit's microcontroller, based on the control program stored in its FLASH memory, polls the analog-to-digital converter and, using a strain gauge, records this event and initiates a temperature sensor polling cycle, which occurs within a range of 1 to 3 seconds. The microcontroller transmits the received telemetry data via a radio module to the remote automated process control system for conducting the controlled experiment for further statistical analysis.

Thus, the device for cooling the barrel of an artillery gun considered in this application makes it possible to measure the temperature of the barrel before and after firing.

Claims (5)

1. A device for studying the intensity of cooling of the barrel of an artillery gun, comprising a temperature measuring unit secured to the outer surface of the barrel casing, characterized in that the measuring unit is implemented on the basis of a microcontroller, provided with first and second measuring inputs, to which are connected a strain gauge for recording the moment of firing based on the vibration of the barrel casing and a resistive temperature sensor, allowing the temperature of the barrel to be measured before and after firing; wherein the measuring inputs of the unit are connected to the lines of the analog-to-digital converter of the microcontroller, and a radio module is connected to the output of its universal synchronous-asynchronous transceiver, configured to transmit telemetry information to a remote automated process control system. 2. The device according to paragraph 1, characterized in that the measuring inputs are based on operational amplifiers. 3. The device according to paragraph 1, characterized in that the control program of the microcontroller is stored in its FLASH program memory. 4. The device according to paragraph 1, characterized in that the microcontroller is designed with the possibility of performing a temperature sensor polling cycle in the range from 1 to 3 seconds. 5. The device according to claim 1, characterized in that the measuring unit is designed with the possibility of installing a wireless communication channel with a remote automated process control system using a radio module.