13 results about "Chamber pressure" patented technology

The invention discloses an energetic propellant based on magnesium-nickel-based metal hydride blending as well as a preparation method and application of the energetic propellant. The preparation method comprises the following steps: step 1, taking metal Mg and Ni elementary substances as raw materials, and preparing magnesium-nickel-based metal alloy powder by adopting a mechanical alloying method; s2, the magnesium-nickel-based metal alloy powder is subjected to hydrotreating, and magnesium-nickel-based metal hydride is obtained; and S3, the magnesium-nickel-based metal hydride is coated with graphene, mechanical ball milling is conducted, the magnesium-nickel-based metal hydride and a monoaromatic propellant are mixed, and the energetic propellant based on magnesium-nickel-based metal hydride mixing is obtained. The characteristic that metal hydride can release hydrogen in a high-temperature environment is utilized, and the release rate of hydrogen energy is regulated and controlled through the size and the proportion, so that the combustion characteristic of propellant powder and the chamber pressure of an inner trajectory during artillery launching are changed, and finally the kinetic energy of a gun muzzle is improved.

A receptacle for a downhole system includes a pressure seal for isolating a first pressure and a second pressure, and a transmission pin passes through the pressure seal. A pressure compensation chamber is positioned within the receptacle between the first pressure and the second pressure and has a chamber pressure sealed from the first pressure and the second pressure. The transmission pin is partially positioned in the pressure compensation chamber, and a pressure compensation device is positioned in the pressure compensation chamber for equalizing the chamber pressure with the first pressure.

The invention relates to an inner ballistic trajectory design method for a floating series double-chamber balance gun. The inner ballistic trajectory design method comprises the steps of dividing an inner ballistic trajectory process period, establishing a gunpowder combustion model in a main chamber and an auxiliary chamber, establishing a projectile motion model, establishing a balance body motion model, establishing an auxiliary chamber motion model and establishing an inner ballistic trajectory energy conservation model. Based on a novel floating series-connection double-chamber structure for a balance gun, construction of an inner ballistic model is completed, and optimization design is conducted on the chamber structure and charging parameters. The problem that a large-diameter barrel weapon generates high bore pressure under the high initial speed index can be effectively solved. On the premise that the maximum chamber pressure is not increased, secondary acceleration of the projectile is achieved, and the outlet speed and the flight performance of the projectile are remarkably improved. According to the method, an important theoretical reference and a practical technical method are provided for design and development of the high-initial-speed large-caliber balance gun in the future, and the method has wide application prospects and great military value.

The invention relates to the field of chamber pressure measurement, and discloses a pressure measuring bomb based on a copper column pressure measuring method and an artillery chamber pressure measuring method, the pressure measuring bomb comprises a projectile, the projectile is loaded with a pressure measuring device, and the sum of the mass of the projectile and the mass of the pressure measuring device is equal to the mass of a projectile of a standard projectile; the pressure measuring device comprises a shell, a balance weight body, a bottom screw and a pressure measuring copper column, the shell is in threaded connection with the projectile, a blind hole is formed in the bottom of the shell, the balance weight body is arranged at the hole bottom of the blind hole, one end of the pressure measuring copper column abuts against the center position of the balance weight body, and the other end of the pressure measuring copper column is supported by the bottom screw in threaded connection with the bottom of the shell in an unpressed mode; the sum m of the mass of the counter weight body and the mass of the pressure measuring copper column should meet the formula, in the formula, R is the radius of the projectile, P is the bore pressure when the projectile is launched, M is the mass of the projectile, and r is the radius of a piston rod of a pressure measuring device in the special pressure measuring artillery. According to the invention, the limitation problem that the bore pressure measurement must be carried out on a specially-made pressure measurement artillery at present is solved.

The utility model discloses a particle cylinder type fire extinguisher which comprises a fire extinguishing agent storage container, a lower end cover, an upper end cover, a sliding block, a pressurizing pipe and a lead control part, the fire extinguishing agent is stored in the container and is separated by the sliding block; the other end of the pressurizing pipe is connected with a high-pressure source, and an electric control valve is arranged in the pressurizing pipe; the upper end cover is provided with a nozzle and a rupture disk which seals a nozzle air channel. When a fire occurs, the lead control part monitors the fire, the electric control valve is opened, high-pressure gas rushes into the cavity to push the sliding block upwards, the fire extinguishing agent is extruded to enable the pressure of the cavity to be increased sharply, the rupture disk is ruptured, and the fire extinguishing agent is sprayed out through the nozzle to extinguish the fire. The fire extinguisher integrates automatic monitoring, high-pressure driving and quick response, is easy and convenient to operate, efficient in fire extinguishing and suitable for various occasions, and remarkably improves the fire safety level.

The present invention belongs to the technical field of spray guns, and discloses a gas spray gun, which includes a spray gun body. One end of the spray gun body is equipped with a pneumatic positioning cylinder, and a positioner is installed on one side of the top end of the spray gun body. A compensation coupler is installed inside the spray gun body near the pneumatic positioning cylinder. A gas guide pipe is arranged axially inside the spray gun body, and a swirling air sheet is arranged outside the gas guide pipe. A centering pin is arranged at one end of the spray gun body far from the pneumatic positioning cylinder. The structure of the present invention is simple, and the air intake is stable. The pressure difference between the gas in the gun and the combustion chamber pressure can be kept constant by changing the gas outlet gap of the spray gun, thereby ensuring that the exhaust gas speed is always sufficiently greater than the flashback speed. The advantage of this spray gun structure is that even with a violently changing exhaust gas volume, stable combustion can be achieved without providing inert gas to ensure the constancy of the volume flow rate and the speed at the spray gun outlet.

This invention relates to a muzzle vibration reduction, noise reduction, and pressurization device, belonging to the field of mechanics. It includes a ferrule holder, a cone plug assembly, and a plug cap. The ferrule holder mates with the muzzle and is cylindrical with an axial opening on its side. A U-shaped notch is provided on the rear face of the ferrule holder, corresponding to the opening. A cone plug hole is coaxially formed on the front face of the ferrule holder. The cone plug assembly includes a cone plug, a washer, a spring, and a limiting block. The cone plug is tubular, with a circumferentially arranged annular limiting ring on its outer wall. The inner diameter of the cone plug is smaller than the inner diameter of the barrel. A spring is fitted onto the rear of the cone plug, and a recess is provided on the rear outer wall of the cone plug. A notch is provided on the limiting block, the width of which is the same as the width of the recess on the cone plug. The propellant gases are limited by the cone plug, increasing the intra-chamber pressure, ensuring the recoil energy of the bolt and smooth ejection of the spent cartridge case, thus providing buffering, energy absorption, and vibration reduction, ensuring reliable continuous firing, and improving service life.

The present invention relates to a combustion light gas cannon projectile equipped with a belt mechanism and a chamber pressure control method thereof, belonging to the field of launch technology. A combustion light gas cannon projectile equipped with a belt mechanism comprises a projectile body, a wind cap fixed in front of the projectile body, a front annular groove provided on the outer surface of the projectile body, a front belt fixed in the front annular groove, and a rear annular groove provided on the outer surface of the projectile body, a rear belt fixed in the rear annular groove; the front belt is annular and is sleeved on the outer side of the projectile body. Its outer surface is a truncated cone with a smaller front and a larger rear surface, and its length is consistent with the width of the front annular groove. Compared with the prior art, the technical effect of the present invention is that the present invention is equipped with two belt mechanisms, which respectively achieve sealing for the two stages, and can achieve a higher chamber pressure.

The invention discloses a structure for launching steel balls in multiple directions, which realizes large-range space strike on coming unmanned aerial vehicles by optimizing a projectile launching mode. During launching, gunpowder gas is generated in the front combustion chamber and pushes the ejector rod, the ejector rod drives the gas closing block, and a bullet passing hole of the gas closing block and a bullet inlet hole in the bullet storage pipe are staggered, so that the bullet inlet hole is closed; after launching, the chamber pressure disappears, the return spring pushes the air closing block to return, the bullet passing hole of the air closing block is aligned with the bullet inlet hole in the bullet storage pipe, the bullet inlet hole is communicated with the bullet supply pipe, and the bullet supply spring pushes the bullet in the bullet supply pipe to enter the bullet storage pipe to wait for next-time launching.

The invention discloses a wide-frequency-domain pulse gun-combustion chamber acoustic oscillation experiment system with a variable excitation direction, and belongs to the field of evaluation of combustion stability of combustion chambers of liquid-propellant rocket engines. The device comprises a pulse gun, a combustion chamber and a pressure testing system. The pulse gun main body structure comprises an igniter, a gun blunderbuss, solid fuel, an O-shaped ring, a brass diaphragm, a brass diaphragm gasket and a gun barrel. A combustion chamber main body structure is divided into a flange cover, a cavity, a metal bolt and a nut. The combustion chamber is mainly used for simulating an actual engine combustion chamber at acoustic frequency. The pressure test system comprises a pressure sensor array and a data acquisition system. And the pressure sensor array is used for measuring the dynamic pressure of each position in the pulse gun and the combustion chamber online in real time. According to the invention, axial, radial and tangential pulse excitation directions can be realized; and a wide combustion chamber acoustic frequency range, a wide combustion chamber back pressure range and different atmosphere environments are achieved. Wherein different atmosphere environments influence acoustic oscillation by influencing the sound velocity.

The invention belongs to the technical field of ammunition launching, and provides a variable-range multi-tube hand grenade launcher which comprises launching tubes, a launching tube positioning cradle, a launcher bracket, a pressure relief device and an electronic equipment box. The pressure relief device is fixedly connected to the rear end of the launching tube positioning cradle and is sleeved at the tail part of the launching tube for movable clearance fit, and the launching tube positioning cradle is arranged between two trunnions of the launcher bracket and is hinged with the launcher bracket through an elevating machine driving shaft and an elevating machine driven shaft which penetrate through the two trunnions. According to the launcher, various purposes of hand grenades of an individual soldier can serve as a warhead, ammunition sources are wide, the vehicle-mounted hand grenades can be mutually supplemented with the hand grenades carried by the individual soldier during wartime and training, tactical flexibility is enhanced, and the pressure of logistics supply is reduced. And meanwhile, the firing range is controlled by controlling the opening number of the pressure relief holes and the firing chamber pressure, so that the tactical requirements of different firing ranges of ammunition for various purposes are met, and the tactical effect of various ammunition is maximized.

This utility model discloses a 40mm tear gas smoke-generating riot control round for riot guns, relating to the field of riot control ammunition technology. The utility model includes a projectile assembly with a launching component at its bottom, and the projectile assembly includes an upper projectile body. By employing a high-low pressure chamber staged pressurization structure, the high-pressure chamber first accumulates energy during propellant combustion, then releases it to the low-pressure chamber through a pressure relief hole, propelling the projectile assembly to embed in the rifling and fly at high speed, increasing the range to ≥200m, with a maximum of 400m. This solves the problems of insufficient chamber pressure and limited range caused by the single high-pressure chamber design in existing technologies, meeting the needs of long-range law enforcement. It uses CS instead of CN as the irritant; CS is chemically stable, non-carcinogenic after combustion, has low skin irritation, and degrades quickly, resulting in minimal environmental impact. This solves the problems of toxic residues and health hazards associated with CN irritants in existing technologies, improving the safety of weapon use.