CN104729364B - A kind of pneumatic separation bullet holder of light-gas gun - Google Patents

Abstract

The present invention relates to a kind of pneumatic separation bullet holder of light-gas gun, it is therefore an objective to for solving the problem that existing bullet holder needs to take attachment device that bullet holder is easily separated and effect is undesirable, cost increases.The present invention is made up of pop-up lobe, subiculum lobe and base plate；Pop-up lobe is two corresponding semicylinders with subiculum lobe.Pop-up lobe center has upper half bullet hole, and hollow structure is drawn in centre；Subiculum lobe constitutes an entirety with base plate, and center has lower half bullet hole, and hollow structure is drawn in centre；Base plate is carved with two seals groove.The upper half bullet hole of pop-up lobe is corresponding with the lower half bullet hole of subiculum lobe, pop-up lobe semicircle is scarce to be engaged with subiculum lobe boss, when not additional segregation apparatus, the air drag utilizing target chamber realizes being automatically separated of bullet holder and bullet, has the outer trajectory performance improving bullet and reduces the feature of launch cost.

Description

A kind of light gas cannon aerodynamic separation bullet holder

technical field

The invention belongs to the field of explosion and impact dynamics, and in particular relates to an improvement of a light gas projectile support structure.

Background technique

The role of the bullet rest is to center and guide the projectile in the barrel, transmit high-pressure gas pressure, make the projectile obtain a higher initial velocity, and separate from the projectile during the process from exiting the muzzle to hitting the target, so that it has good external ballistic performance , in order to avoid further loading of the kinetic energy of the bullet rest on the projectile. The existing method mainly adopts an additional separation device for separation. The main problems of this technology are: the additional separation method is to install a mechanical device between the gun barrel and the target chamber, and the bullet holder is broken and separated by impact. The fragments formed after separation will still follow up and act on the projectile again, affecting the external ballistic performance of the projectile. The coaxiality between the inner hole and the gun barrel of this type of device is relatively high. At the same time, the additional separation device increases the complexity of the light gas gun system, occupies the space in the target room, and needs to replace vulnerable parts after multiple tests, which increases the launch cost.

Contents of the invention

In order to solve the technical problems of the separation difficulty of the existing light gas gun shell holder, which needs to be separated by means of other mechanical devices and the separation effect is poor, and the structure of the light gas gun system is complicated, the invention provides a pneumatically separated bullet holder, which can In the process of hitting the target, the automatic separation of the bullet holder and the projectile can be smoothly realized.

Technical scheme of the present invention is as follows:

A kind of aerodynamic separation bullet holder for a light gas gun, which is special in that it includes an upper holder flap, a lower holder flap and a bottom plate, and the upper holder flap and the lower holder flap are buckled together to form a cylinder whose outer diameter matches the inner diameter of the gun barrel body, the cylinder is provided with an air vortex structure and blind hole-shaped projectile holes from front to back along the length direction, the air vortex structure is a first cavity opened from the front end of the cylinder backward, and the first cavity The size gradually becomes smaller from the front end of the cylinder to the rear, and the bottom plate is arranged at the rear end of the bottom of the cylinder.

The above is the basic technical solution of the present invention, based on the technical solution, the present invention can also make the following improvements:

Above-mentioned light gas cannon aerodynamic separation ball support also comprises the second cavity that offers along cylinder length direction, and the radial dimension of described second cavity is greater than the diameter of projectile hole, and described second cavity and first cavity and There is a certain distance between the rear ends of the cylinders.

The axes of the first cavity, the projectile hole and the second cavity are all coincident with the axis of the cylinder. This limitation is mainly to ensure the coaxiality of the projectile and the barrel after assembly, and the symmetry of the force on the entire projectile during the operation of the barrel.

The shape of the above-mentioned first cavity is a revolving body, and the generatrix of the revolving body is an arc or a straight line, and the reason for the generatrix being an arc or a straight line is based on the ease of processing.

The arc generatrix of the above-mentioned revolving body is tangent to the cylinder, and the angle between the chord and the outer wall of the cylinder is 30°-45°; the angle between the straight-line generatrix of the revolving body and the outer wall of the cylinder is 30°-45°. This structural limitation is mainly based on comprehensive consideration of the aerodynamic performance and structural strength of the first cavity. If the angle is too small, the strength of the front cone may not be sufficient. If the angle is too large, the separation force will be limited and the separation cannot be achieved well. It is proved feasible by experiments.

The above-mentioned second cavity is cylindrical in shape. The second cavity can adopt other shapes, and the generatrix can be an outwardly concave or inwardly convex arc or a straight line with an angle. The cylindrical shape is mainly used to reduce the negative weight of the bullet holder and form the first The two air vortexes accelerate the separation of the bullet holder.

The above-mentioned upper support flap includes a semicircle, and the semicircle is arranged at the rear end of the upper support flap, and the lower support flap includes a boss that is adapted to the semicircle, and the passage between the upper support flap and the lower support flap The matching buckle with the boss forms a cylinder. The upper tray and the lower tray must be buckled into a complete cylinder, but other forms can be used. The lower support flap can be a convex strip, and the upper support flap can be a matching groove.

The bottom plate and the lower support flap form an integral body.

At least one circumferential sealing groove is provided on the bottom plate.

The above-mentioned upper support valve, lower support valve and bottom plate are made of nylon.

The advantages of the present invention are as follows:

1. The air vortex structure of the present invention can quickly respond to air resistance, form a high-pressure air vortex at the front end, generate radial separation force, and realize the automatic separation of the upper and lower support valves and the bottom plate;

2. While ensuring the structural strength of the bullet holder, the present invention digs out the radial part into a hollow structure to reduce the negative weight of the bullet holder. At the same time, an additional air vortex can be formed during the separation process to further aggravate the separation of the bullet holder;

3. In the present invention, the lower support flap and the bottom plate are integrated, and the bottom plate is separated when the lower support flap is separated, and no additional measures are needed to separate the bottom plate;

4. The invention designs two sealing grooves, which solves the problem of air leakage of single sealing.

5. The bullet holder of the present invention adopts high-specific-strength material nylon as the main material, which not only reduces the negative weight of the bullet holder, but also ensures the structural strength of the bullet holder;

6. The present invention can be applied to projectiles of different sizes by changing the diameter and axial length of the projectile hole, and has strong versatility.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the aerodynamic separation bullet holder of a 130mm light gas gun;

Figure 2 is a schematic diagram of a two-dimensional cross-section of a 130mm light gas gun with aerodynamically separated bullet holder;

Figure 3 is a schematic diagram of the assembly in the barrel of the 130mm light gas gun with aerodynamically separated bullet holder;

Figure 4 is a schematic diagram of the start of separation of the 130mm light gas gun aerodynamic separation bullet holder;

Figure 5 is a schematic diagram of the further separation of the aerodynamic separation bullet holder of the 130mm light gas gun;

Fig. 6 is another fastening structure of the light gas gun aerodynamic separation bullet holder of the present invention.

The reference signs are as follows: 1-upper support valve, 2-lower support valve, 3-bottom plate, 4-upper half projectile hole, 5-lower half projectile hole, 6-upper half hollow structure, 7-lower half hollow structure, 8 -Sealing groove, 9-semi-round gap, 10-boss, 11-upper half air vortex structure, 12-lower half air vortex structure, 13-projectile, 14-sealing ring, 15-barrel, 16-high pressure gas, 17 - the front end of the gun barrel, 18 - air resistance, 19 - air vortex, 20 - airflow on the outer surface of the support flap, 21 - convex strip, 22 - groove.

detailed description

The bullet holder is a structural part with very complicated force. It is driven by the thrust of the high-pressure gas to drive the bullet to move in the chamber. The bullet support must have a certain firing strength to ensure that it remains intact under the worst conditions of the chamber pressure and will not break, so that it can correctly guide the movement of the projectile in the barrel. The bullet holder is an important part of launching projectiles, but it is a "non-combat component", and its weight is negative weight. Therefore, in the design process of the bullet holder, under the condition of ensuring the launch strength, it should be based on the structure and materials. Lower its negative weight.

Based on the above considerations, the pneumatic separation bullet holder of the present invention adopts a split hollow shape, and an air vortex structure is designed at the front end to drive the bullet holder to separate from the projectile after the projectile is fired out of the muzzle. At the same time, the middle part is hollowed out to reduce the number of bullet holders The negative weight of the projectile will intensify the separation, and the automatic separation can be realized by using the air resistance at high speed, and the separation process basically does not affect the external ballistic performance of the projectile.

Embodiment 1: (see Fig. 1, Fig. 2) this embodiment is made up of upper support valve 1, lower support valve 2 and base plate 3; Upper support valve 1 and lower support valve 2 are two corresponding half cylinders, and upper support valve The front end of the petal 1 is designed with an air vortex structure 11, and the center is provided with a projectile hole 4; the lower support valve 2 and the bottom plate 3 form an integral body, and the bottom plate is necessary in the present invention, and plays the role of transmitting high-pressure gas pressure. The front end of the lower support valve 2 It is designed with an air vortex structure 12 corresponding to the upper support valve 1, and a bullet hole 5 is opened in the center; the bottom plate 3 is engraved with two sealing grooves 8. The upper half of the projectile hole 4 of the upper support valve 1 corresponds to the lower half of the projectile hole 5 of the lower support valve 2, and the semicircular gap 9 of the upper support valve 1 is engaged with the boss 10 of the lower support valve 2. The materials of the upper support valve 1, the lower support valve 2 and the bottom plate 3 are nylon.

Embodiment 2: (see FIG. 2 ) The difference between this embodiment and the previous embodiment is that the construction lines of the air vortex structure 11 and the air vortex structure 12 can be straight lines or arcs. The angle between the straight line and the outer wall of the support valve is 30°-45°; the arc is tangent to the outer wall of the support valve, and the angle between the chord and the outer wall of the support valve is 30°-45°.

Embodiment 3: (see Fig. 1, Fig. 2) The difference between the present embodiment 3 and embodiment 1 is that the middle of the upper support valve 1 is hollowed out into a hollow structure 6, and the middle of the lower support valve 2 is hollowed out to be the same as that of the upper support valve 1. The corresponding hollow structure 7.

Embodiment four: (referring to Fig. 1, Fig. 6) the difference between this embodiment and embodiment one is that the way that the upper support valve and the lower support valve must be buckled into a complete cylindrical shape is different, and the lower support valve is a convex strip 21, The upper support flap is a groove 22 matched with the protruding strip.

Working principle: As shown in Figure 3, the projectile is composed of a projectile and a bullet holder, which are integrally assembled in the gun barrel. Relying on the constraints of the gun barrel, the upper and lower brackets are engaged, and the front end of the gun barrel is evacuated into a vacuum environment. When the light gas gun activates the firing command, the bottom of the bullet holder is affected by the high-pressure gas, which pushes the firing bullet to accelerate in the barrel. As shown in Figure 4, after the launch ejects from the muzzle, according to the principle of aerodynamics, the air resistance enters the air vortex structure, the flow velocity decreases and an air vortex is formed; the air resistance on the outer surface of the support flap is not affected, and the flow velocity basically remains unchanged. Therefore, in the air vortex structure, a high pressure will be formed against the outer wall of the supporting valve, which will generate radial tension and axial resistance, so that the upper supporting valve and the lower supporting valve will open upward and downward respectively, forming a large separation angle. , and are separated axially. When the airflow further enters the hollow structure, a high-pressure air vortex will also be generated, which will intensify the separation of the upper and lower trays. As shown in Figure 5, during the flight, under the action of air resistance, the projectile and the carrier are further separated. As long as the distance between the muzzle and the target plate is sufficient, the projectile will completely get rid of the restraint of the carrier, ensuring that after the projectile hits the target, The kinetic energy of the bullet rest will not be loaded on the projectile again, affecting the external ballistic performance of the projectile.

Claims (9)

1. A light gas gun aerodynamically separates the bullet holder, which is characterized in that: it comprises an upper holder flap, a lower holder flap and a base plate, and the upper holder flap and the lower holder flap are interlocked to form a cylinder whose outer diameter matches the inner diameter of the gun barrel body, the cylinder is provided with an air vortex structure and blind hole-shaped projectile holes from front to back along the length direction, the air vortex structure is a first cavity opened from the front end of the cylinder backward, and the first cavity The size of the cylinder gradually decreases from the front end to the rear, and the bottom plate is arranged at the rear end of the bottom of the cylinder; The light gas cannon aerodynamically separates the bullet holder and also includes a second cavity provided along the length direction of the cylinder, the radial dimension of the second cavity is greater than the diameter of the bullet hole, and the second cavity is the same as the first cavity. and the rear end of the cylinder have a certain distance. 2. The aerodynamic separation bullet holder for a light gas gun according to claim 1, wherein the axes of the first cavity, the projectile hole and the second cavity are all coincident with the axis of the cylinder. 3. The light gas cannon aerodynamic separation bullet holder according to claim 2, characterized in that: the shape of the first cavity is a revolving body, and the generatrix of the revolving body is an arc or a straight line. 4. The light gas cannon aerodynamic separation bullet holder according to claim 3, characterized in that: the arc generatrix of the revolving body is tangent to the cylinder, and the included angle between the chord and the outer wall of the cylinder is 30° to 45° ; The angle between the straight generatrix of the rotary body and the outer wall of the cylinder is 30°-45°. 5. The light gas cannon aerodynamic separation bullet holder according to claim 4, characterized in that: the shape of the second cavity is cylindrical. 6. The light gas cannon aerodynamic separation bullet holder according to claim 5, characterized in that: the upper holder flap includes a semicircular segment, the semicircular segment is arranged at the rear end of the upper holder flap, and the lower holder flap includes a The semi-circular gap is matched with the boss, and the upper and lower supporting flaps are buckled into a cylinder through the cooperation of the semi-circular gap and the boss. 7. The light gas gun aerodynamic separation bullet holder according to any one of claims 1-6, characterized in that: the bottom plate and the lower holder flap form an integral body. 8. The light gas cannon aerodynamic separation bullet holder according to claim 7, characterized in that: at least one circumferential sealing groove is arranged on the bottom plate. 9. The pneumatic separation spring holder according to claim 8, characterized in that: the materials of the upper holder flap, the lower holder flap and the bottom plate are all nylon.