CN116398643A - Special-shaped closed gas ring applied to rail balance gun - Google Patents

Abstract

The invention relates to a special-shaped closed ring for a rail balance gun, which is of a disc-shaped structure with a groove, and particularly comprises a special-shaped groove, an edge thin wall, a reinforcing ring, a connecting part and a closed ring bottom plate; the closed ring bottom plate is provided with a special-shaped groove for enabling the closed ring to be attached to the track; the edge thin wall is arranged at the edge of the air-tight ring and is used for realizing radial sealing; the reinforcing ring is connected with the transition edge thin wall and the closed ring bottom plate and is used for providing structural support for the closed ring bottom plate; the bottom plate of the air-closed ring is provided with a connecting part for fixing the air-closed ring at the tail part of the projectile. Compared with the prior art, the special-shaped closed ring is suitable for balance cannons, realizes a good closed effect by applying a simple structure, and is convenient to install.

Description

A special-shaped gas-closing ring applied to rail-balanced guns

technical field

The invention belongs to the field of high-pressure dynamic sealing, and in particular relates to a special-shaped air-tight ring applied to a rail-balanced gun.

Background technique

The gas-holding ring is an important part of the artillery. The analysis of the gas-holding mechanism and the correct selection of the gas-holding method are the keys to achieving reliable gas-holding. The sealing principle of the gas-tight ring is that under the action of the gunpowder pressure, the thin wall of the gas-tight ring deforms radially and closely contacts the inner wall of the drug to achieve radial sealing. As the pressure increases, the contact force increases, and the axial fit and diameter The elastic fit is tighter, and the purpose of sealing the gunpowder gas is finally achieved.

The performance indicators of the gas-tight ring are mainly (1) the reliability of the gas-tight ring: the gas-tight ring and the liner are clearance fit, and the leakage of gunpowder and gas should be reduced as much as possible; (2) the service life of the gas-tight ring: the gas-tight ring is affected by the gunpowder gas After a few rounds of shooting, the air-holding property will be unreliable; (3) The safety of the air-closing ring: there are reliable measures to ensure that it will not be damaged under working conditions; (4) Serviceability: to ensure convenient maintenance and operation, and parts replacement easy.

At present, there are mainly types of gas-closing rings: (1) Conical gas-closing type in the bore of the barrel: this gas-closing ring is installed at a certain angle with the inner wall of the drug chamber, and the gas-closing ring produces radial elastic deformation under the pressure in the bore. The air-tight ring is closely attached to the inner wall of the drug chamber, and finally achieves radial sealing; (2) Double-cone air-tight type: this type of air-tight ring has double-cone surfaces with a diamond-shaped cross-section, and the front and rear two conical surfaces are respectively connected to the inner bore of the gun barrel and The corresponding contact surface of the bolt body outside the bore of the barrel fits together, and the air-tight ring is expanded and calibrated by the pressure of the gunpowder gas in the bore to achieve reliable sealing; It moves together with the latch body to convert the pressure in the bore into the bonding force between the gas-closing ring and the end face of the barrel, and uses the close fit between the end face of the gas-closing ring and the end face of the barrel to seal the gunpowder gas in the bore; (4) The radial direction inside the bore and the end face outside the bore Hybrid gas-holding type: the front part of this type of gas-closing ring is designed as a cylindrical surface or a thin-walled conical surface with a certain angle. When the artillery is fired, the thin-walled cylindrical surface at the front will elastically deform and fit closely with the inner wall of the drug to achieve diameter towards the seal.

However, the above-mentioned gas-closing ring type is only applicable to the shooting tests of various conventional barrel-barrel artillery, while the barrel of the rail-balanced gun is paved with running tracks, so that the launch environment of the projectile is no longer a circumferentially symmetrical barrel. Instead, it has become a special-shaped structure that conforms to the "barrel + rail", so it is completely inapplicable to the structure of the rail-balanced gun (rails are laid inside the barrel, and the projectile runs on the rail), which makes the rail-balanced gun The breath-holding problem is more serious.

Contents of the invention

The object of the present invention is to provide a special-shaped gas-tight ring applied to a rail-balanced gun. Aiming at the characteristics that the rail-balanced gun bore is paved with running tracks, the special-shaped gas-trap ring used for a rail-balanced gun can be optimized through reasonable structural dimensions, Shape optimization and topology optimization solve the problem that it is difficult to ensure a good air-holding effect in rail balanced guns.

The technical solution to realize the object of the present invention is: a special-shaped air-tight ring for a railed balance gun, the air-tight ring is a disc-shaped structure with grooves, specifically including a special-shaped groove, a thin wall at the edge, a reinforcement ring, a connecting part and Air-tight ring bottom plate; there are special-shaped grooves on the bottom plate of the gas-tight ring, which are used to fit the gas-tight ring and the track; the edge thin wall is set on the edge of the gas-tight ring for radial sealing; the reinforcement ring connects the edge thin wall and the gas-tight ring bottom plate , which is used to provide structural support for the bottom plate of the gas-holding ring; the bottom plate of the gas-holding ring is provided with a connecting part for fixing the gas-holding ring to the tail of the projectile.

Compared with the prior art, the present invention has the remarkable advantages of:

(1) The outer wall surface of the gas-holding ring in the present invention is a non-conical surface, and the outer diameter of the gas-holding ring is the same as that of the projectile, so it can be easily loaded into a balance gun with an equal diameter barrel to ensure a good gas-holding effect.

(2) The shape of the gas-holding ring in the present invention is not circumferentially symmetrical, but a special-shaped structure conforming to the "equal-diameter barrel + rail", so it can better fit the inner wall of the barrel of the new rail balanced gun, To ensure a good breath-holding effect;

(3) The gas-holding ring in the present invention has a ring of reinforcement rings, in order to increase its strength, that is, under the action of gunpowder gas, ensure that its structure is intact and realize the function of gas-holding;

(4) The groove tail of the air-tight ring in the present invention is a smooth transitional arc that buckles inwards. Under the action of gunpowder gas, it fits better on the track, and the arc that buckles inward wraps the track better, increasing the Apnea effect.

Description of drawings

Fig. 1 is the front three-dimensional structure schematic diagram of air-tight ring;

Fig. 2 is a schematic diagram of the back stereoscopic structure of the air-tight ring;

Fig. 3 is the schematic diagram of the front view of the closed gas ring;

Fig. 4 is a sectional view at A-A shown in Fig. 3 closed gas ring;

Figure 5 is the chamber pressure curve of the 1.99kg heavy projectile;

Fig. 6 is the chamber pressure curve of the 2.27kg heavy projectile.

Detailed ways

The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments. As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a special-shaped air-tight ring for rail balance guns invented this time is in the shape of a disc with grooves, and its main features include special-shaped grooves 1, thin edges Wall 4, reinforcement ring 5, connecting hole 6 and bottom plate 7 of air-tight ring. The air-tight ring bottom plate 7 is provided with a special-shaped groove 1, which is used to make the air-tight ring and the track fit together; the edge thin wall 4 is arranged on the edge of the air-tight ring, and is divided into a circular arc segment edge thin wall and a notch segment edge thin wall, for When the projectile is fired, the edge thin wall 4 produces radial deformation, so that the outer wall of the air-tight ring fits the inner wall of the barrel and the inner wall of the track to achieve radial sealing; the reinforcement ring 5 is used to connect the transition edge thin-wall 4 and the bottom plate of the air-tight ring , which is a thickened smooth conical surface, except for the thin wall 4 at the edge, the design of the reinforcement ring 5 increases the overall structural strength of the gas-tight ring, increases the structural support of the bottom plate of the gas-tight ring, and thus increases the reliability of the gas-tight ring; The bottom plate of the ring is provided with a connection hole 6, which is used to fix the tail of the projectile by the gas-tight ring with screws.

Among them, the special-shaped groove 1 includes a rectangular groove 2 and a groove tail 3. The structural shape of the rectangular groove 2 is designed according to the geometric cross-sectional shape of the inner and outer rails of the balanced gun bore, and the shape of the groove fits the inner rail of the balanced gun bore; The smooth and excessive arc of the inner buckle fits the track and fastens the track inwardly, which increases the air-holding effect and also increases the stability of the projectile moving along the track; the connecting holes 6 are preferably three symmetrical with the axis of the air-holding ring as the center Threaded hole;

At the same time, according to the internal ballistic principle, the pressure function of the drug chamber is:

表示药室内平均压力，/>

是点火药压力，/>

为火药力，/>

为装药量，/>

表示火药已燃质量百分比，/>

是药室容积，/>

是火药气体密度，/>

是火药余容。in

Indicates the average pressure in the chamber, />

is the ignition charge pressure, />

For gunpowder, />

is the charge, />

Indicates the mass percentage of gunpowder burned, />

is the chamber volume, />

is the powder gas density, />

It is the remaining capacity of gunpowder.

Define the depth of the closed gas ring as L, and its functional relationship can be expressed as:

为闭气环外壁面与身管内壁面的间隙，E为闭气环材料的弹型模量，/>

为闭气环材料的许用应力。In the formula: R is the radius of the outer wall of the air-tight ring, p is the average pressure in the chamber,

is the gap between the outer wall of the gas-closing ring and the inner wall of the barrel, E is the modulus of elasticity of the material of the gas-closing ring, />

is the allowable stress of the closed gas ring material.

The working principle of the special-shaped gas-tight ring is as follows: In the shooting test of the rail-balanced gun, the special-shaped gas-trap ring is fixed on the tail of the projectile with screws and loaded in the barrel of the rail-balanced gun; Fitting together, when launching, the thin-walled edge 4 of the special-shaped air-tight ring is deformed under force, and the thin-walled edge 4 will produce radial deformation, so that the outer wall of the thin-walled edge of the circular arc section fits with the inner wall of the barrel, and the notch section The thin wall at the edge fits with the track wall to realize the radial sealing of the bullet. At the same time, under the support of the reinforcement ring 5 and the bottom plate of the gas-tight ring, the overall structure of the gas-tight ring is stable, so that the sealing effect is better.

As shown in Figure 5 and Figure 6, according to the test results, under the same gunpowder loading, the maximum chamber pressure of the 1.99kg projectile is 198.0Mpa; the maximum chamber pressure of the 2.27kg projectile is 219.0Mpa, The consistency of the maximum chamber pressure under the two test conditions is good, which is in line with the internal ballistic theory, which proves that the gas-holding performance is good.

The special-shaped air-tight ring provided by the invention is applied to the rail-balanced cannon, and its structural design principle is simple, easy to realize, and ensures the air-trap problem in the special-shaped gun barrel. On the premise of ensuring the normal functions of other components of the balance cannon, the structural size optimization, shape optimization and topology optimization of the special-shaped air-tight ring were carried out to ensure a good air-tight effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the essence and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A special-shaped air-tight ring for rail-mounted guns, characterized in that the air-tight ring is a disc-shaped structure with grooves, including special-shaped grooves, edge thin walls, reinforcement rings, joints and the air-tight ring bottom plate; the air-tight ring There are special-shaped grooves on the bottom plate of the ring, which are used to fit the air-tight ring and the track; the edge thin wall is arranged on the edge of the air-tight ring to realize the radial sealing of the air-tight ring; It is used to provide structural support for the bottom plate of the gas-holding ring; there is a connecting part on the bottom plate of the gas-holding ring, which is used to fix the gas-holding ring on the tail of the projectile. 2. The special-shaped gas-closing ring for a rail-balanced gun according to claim 1, wherein the thin wall at the edge is divided into a thin wall at the edge of an arc segment and a thin wall at the edge of a notch segment. 3. The special-shaped gas-closing ring for a rail-mounted gun according to claim 1, wherein the connecting portion is a connecting hole. 4. The special-shaped gas-closing ring for a rail-balanced gun according to claim 1, wherein the reinforcing ring is a thickened smooth conical surface. 5. The special-shaped gas-closing ring for a rail-balanced gun according to claim 1, wherein the special-shaped groove comprises a rectangular groove and a groove tail. 6. the special-shaped gas-closing ring that is used for rail balanced gun according to claim 1, is characterized in that, the depth of described gas-closing ring satisfies the following conditions:

In the formula, L is the depth of the closed gas ring,

Indicates the average pressure in the chamber, />

is the gap between the outer wall of the gas-closing ring and the inner wall of the barrel, E is the modulus of elasticity of the material of the gas-closing ring, />

is the allowable stress of the closed gas ring material. 7. The special-shaped air-trap ring for rail balanced gun according to claim 1, characterized in that, said special-shaped groove comprises a rectangular groove and a groove tail; the shape of the rectangular groove is consistent according to the collective section shape of the balanced gun track ;The end of the groove is a smooth and excessive arc that buckles inward, and fits the track and buckles the track inward.

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