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CN-117948844-B - Embedded combined air-tight ring applied to tubular pellets with equal diameter

CN117948844BCN 117948844 BCN117948844 BCN 117948844BCN-117948844-B

Abstract

The invention discloses an embedded combined closed ring applied to a constant diameter barrel, which is of a combined structure, and the closed structure is respectively a closed ring and a push ring from front to back. The rear end face of the closed ring is provided with a circle of groove, the cross section of the groove is trapezoid, the cross section of the push ring is trapezoid, waist angles of the two trapezoid cross sections are equal, the closed ring is sleeved at the bottom of the projectile and is tightly matched with the projectile, the front end part of the push ring is embedded into the groove of the closed ring, a gap exists between the front end face of the push ring and the front end face of the closed ring groove, the rear end face of the push ring is positioned through an annular bottom plate, and the closed ring, the push ring and the projectile are fixedly connected through a plurality of bolts arranged on the annular bottom plate. The invention solves the problem of air lock in the middle chamber of the equal-diameter barrel gun.

Inventors

  • HUANG YONG
  • ZHAO JINYU
  • WANG HAO
  • CHEN CHANGSHUN
  • JIANG KUN
  • TAO RUYI

Assignees

  • 南京理工大学

Dates

Publication Date
20260512
Application Date
20240305

Claims (5)

  1. 1. The embedded combined closed ring for the constant-diameter barrel projectile is characterized in that a closed ring (3) and a push ring (4) are sequentially arranged from front to back, a circle of groove is formed in the rear end face of the closed ring (3), the cross section of the groove is trapezoid, the cross section of the push ring (4) is trapezoid, waist angles of the two trapezoid cross sections are equal, the closed ring (3) is sleeved at the bottom of the projectile (1) and is tightly matched with the projectile, the front end part of the push ring (4) is embedded into the groove of the closed ring (3), a gap exists between the front end face of the push ring (4) and the front end face of the groove of the closed ring (3), the rear end face of the push ring (4) is positioned through an annular bottom plate (5), and the closed ring (3) and the push ring (4) are fixedly connected with the projectile (1) through a plurality of bolts arranged on the annular bottom plate (5). The outer diameter of the closed ring (3) is equal to the outer diameter of the projectile (1), and the outer diameter of the push ring (3) is smaller than or equal to the outer diameter of the projectile (1); the included angle between two waists of the trapezoid section is set as And establishing a functional relation: , Wherein R is the outer diameter of the pellet (1), R c is the distance between the central line of the trapezoid cross section of the groove on the closed air ring (3) and the central line of the pellet (1), h u is the upper bottom length of the trapezoid cross section of the groove on the closed air ring (3), and l u is the height of the trapezoid cross section of the groove on the closed air ring (3).
  2. 2. The embedded combined closed ring for the constant diameter barrel projectile as claimed in claim 1, wherein the upper base length of the trapezoid section of the push ring (4) is h d , and a functional relation is established: , Wherein delta is the gap between the projectile (1) and the barrel (6), and c is a constant term, and 1.5-3 are taken.
  3. 3. The embedded combined closed ring for the constant diameter barrel projectile as claimed in claim 2, wherein the height of the trapezoid section of the push ring (4) is l d , and a functional relation is established: , Wherein R is the outer diameter of the projectile (1).
  4. 4. The embedded combined closed ring for the constant diameter barrel projectile as claimed in claim 3, wherein the height of the trapezoid cross section of the groove on the closed ring (3) is l u , and a functional relation is established: , wherein: is the pressure of the gas in the bore, Is the allowable stress of the material of the closed air ring (3).
  5. 5. The embedded combined closed ring for the constant diameter barrel projectile as claimed in claim 1, wherein a circle of limiting protrusions are arranged at the rear end of the circumferential outer wall of the annular bottom plate (5), the annular bottom plate (5) has a limiting effect on the closed ring (3) and the push ring (4), and the outer diameter of the limiting protrusions of the annular bottom plate (5) is smaller than the outer diameter of the push ring (4), so that high-pressure fuel gas in a chamber is in contact with the bottom surface of the push ring (4) to push the push ring (4) to be extruded into a groove of the closed ring (3).

Description

Embedded combined air-tight ring applied to tubular pellets with equal diameter Technical Field The invention belongs to the field of high-pressure dynamic sealing, and particularly relates to an embedded combined closed ring applied to constant-diameter barrel shots. Background At present, most of artillery closed gas structures adopt a bullet belt structure, the bullet belt is suitable for a wire-bore barrel artillery, and because the diameter of a wire-bore gun powder chamber is slightly larger than the diameter of a transmitting barrel, the outer diameter of the bullet belt is usually larger than the diameters of a bullet and the transmitting barrel in the design process of the bullet belt, and the bullet belt is extruded into a barrel rifling in the transmitting process, so that the bullet belt spins to enhance the axial stability while ensuring the closed gas of the bullet belt For the smooth bore gun with the equal-diameter barrel, as the diameter of the powder chamber is the same as that of the transmitting barrel, if a belt structure is adopted for sealing, the loading of the projectile is difficult because the outer diameter of the belt is higher than the inner diameter of the barrel, so that the sealing structure is not applicable any more. The common air-closing structure for the bullet of the smooth bore gun with the barrel of the same diameter is provided with air-closing grooves, namely a plurality of annular grooves are arranged on the outer side of the bullet body in a turning mode to be used as the air-closing structure. When the high-pressure gas passes through the grooves during emission, the high-pressure gas expands to form vortex, so that the speed is reduced, the discharge amount of the gunpowder gas is reduced, and the effect of sealing the gunpowder gas is achieved. However, the closed gas channel does not completely reduce the leakage of gas, and thus a more effective sealing structure is required. Disclosure of Invention The invention provides an embedded combined closed ring applied to constant-diameter barrel shots, which aims to solve the problem of ensuring good closed effect in a smooth bore gun with high bore pressure and single barrel diameter. The technical scheme includes that the embedded combined closed ring applied to the constant-diameter barrel projectile is provided with a closed ring and a push ring from front to back, the rear end face of the closed ring is provided with a circle of grooves, the cross section of each groove is trapezoid, the cross section of each push ring is trapezoid, waist angles of the two trapezoid cross sections are equal, the closed ring is sleeved at the bottom of the projectile and is tightly matched with the projectile, the front end part of the push ring is embedded into the grooves of the closed ring, a gap exists between the front end face of the push ring and the front end face of the closed ring groove, the rear end face of the push ring is positioned through an annular bottom plate, and the closed ring, the push ring and the projectile are fixedly connected through a plurality of bolts arranged on the annular bottom plate. Compared with the prior art, the invention has the remarkable advantages that: (1) The outer diameter of the closed ring in the combined closed structure is the same as the outer diameter of the projectile, and the outer diameter of the push ring is smaller than or equal to the outer diameter of the projectile, so that the combined closed structure can be easily installed in an artillery with a smooth bore barrel with the same diameter, and can ensure a better closed effect. (2) The combined air-closing structure comprises an air-closing ring and a push ring, wherein the cross section shape of the push ring and the cross section shape of a groove of the air-closing ring are isosceles trapezoids, and the waist angles of the two trapezoids are equal. The rear end face of the push ring is acted by high-pressure gas in the bore, and the front end part of the push ring is continuously extruded into the groove of the air-closing ring, so that the outer wall surface of the air-closing ring is outwards expanded along the radial direction until the outer wall surface of the air-closing ring is tightly attached to the inner wall surface of the pipe, and the air-closing effect is achieved. (3) The area of the rear end face of the push ring in the combined closed gas structure is larger than the area of the outer wall face of the closed gas ring, which is tightly attached to the inner wall face of the barrel, so that the attaching pressure between the outer wall face of the closed gas ring and the inner wall face of the barrel is larger than the high-pressure gas pressure born by the bottom face of the push ring, and the closed gas structure has a good sealing effect. (4) The combined air-closing structure is embedded in the pellet, and the rear end face of the push ring is limited in the rear end face of the pellet, so tha