CN117824971A - Reusable bullet holds in palm self-separating light gas gun - Google Patents

Abstract

The invention discloses a reusable bullet support self-separating type light gas gun, which comprises a light gas gun tube and bullet, wherein the bullet support self-separating type light gas gun also comprises a self-separating bullet support, the self-separating bullet support comprises m split type bullet support units, the split type bullet support units are of a fan-shaped structure with the angle radian of 360 degrees/m, the middle parts of the m split type bullet support units are aligned and embraced to form the self-separating bullet support, bullet support grooves are formed in the middle parts of the self-separating bullet support units and are used for installing the bullet, the bullet support grooves are uniformly distributed on the split type bullet support units, when the self-separating bullet support is placed in an inner cavity of the light gas gun tube, the split type bullet support units are pressed and fixed under the action of the light gas gun tube, and when the self-separating bullet support is separated from the light gas gun tube, the split type bullet support units are respectively dispersed, and m is a positive integer not less than 2. The invention has the advantages of automatic and reliable separation after the bullet holder is separated from the light gas gun barrel and repeated use.

Description

Reusable bullet holds in palm self-separating light gas gun

Technical Field

The invention relates to the technical field of foreign object damage tests, in particular to a reusable bullet support self-separating light air gun.

Background

High speed vehicles such as aircraft, high speed rail, etc. are often subject to impacts from objects such as sand, hail, etc., commonly referred to as foreign object damage (foreign object damage, FOD for short). FOD poses a threat to the safety of the vehicle because it can cause stress concentrations at the impact site, thereby reducing the fatigue life of the structure. In order to study the effect of FOD on structural integrity, it is necessary to reproduce FOD under laboratory conditions. Kinetic energy is extracted from the compressed gas through the sabot and a simulated impact object (such as gravel, puck, etc.) is pushed to strike the target, which is the most commonly used light air gun/cannon test method at present. In order to avoid the impact of the sabot with the simulated impact object against the target, thereby affecting the accurate reproduction of the FOD, a sabot separation device is typically required. The existing separation devices can be divided into a passive separation device and an automatic separation device. Wherein, the passive separation means that the elastic support is blocked by a mechanical device with holes, so that the simulated flying object is separated from the small Kong Feichu in the mechanical device. In the separation mode, the bullet support bears extremely large impact load, and is often broken and cannot be reused. And the other type of active separation device usually adopts a split type bullet holder, and aerodynamic force drives the bullet holder to separate along the radial direction when the bullet holder flies out of the muzzle. However, the current separation-dependent aerodynamic forces from the separation sabot are difficult to control accurately. On one hand, aerodynamic force influence factors are numerous, and the reliability of separation of the bullet holder is restricted; on the other hand, aerodynamic forces are linked to the flight speed, which results in a narrow speed interval for which the sabot is suitable.

Therefore, there is a need to provide a reusable, self-separating sabot for use in foreign object damage laboratory simulation to enable automatic, reliable separation of sabots in FOD laboratory simulation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a reusable bullet-holder self-separating light air gun which is used for simulating continuous impact damage of foreign objects under laboratory conditions.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the utility model provides a repeatedly usable's bullet holds in palm from separating formula light gas big gun, including light gas big gun pipe and pellet, bullet holds in the palm from separating formula light gas big gun still including from separating bullet and holds in the palm, from separating bullet and hold in the palm the unit including the fan-shaped structure that the angle radian is 360/m from separating bullet, the separation bullet holds in the palm the unit middle part alignment and embraces the constitution from separating bullet and hold in the palm, be provided with bullet and hold in the palm the recess from separating bullet in the middle part, bullet holds in the palm the recess and is used for installing the pellet, bullet holds in the palm the recess and equipartition on each split type bullet holds in the unit, from separating bullet holds in the palm when arranging in light gas big gun pipe inner chamber in the light gas big gun, each split type bullet holds in the unit pressfitting under the effect of light gas big gun pipe and fixes, from separating bullet holds in the palm the unit separately when deviating from light gas big gun pipe from, m is not less than 2 positive integer.

In order to optimize the technical scheme, the specific measures adopted further comprise:

m is equal to 3.

The inner side of the light gas gun tube is provided with m track grooves, and the outer side surface of the split type bullet holds in the palm the unit and is provided with bullet holding in the palm the burr that suits with the track grooves.

The track groove is a spiral groove, and correspondingly, the bullet support convex line is a spiral convex line.

The self-separating bullet holders are arranged in a plurality, and the self-separating bullet holders can be arranged in the light gas gun tube at one time.

The bullet holds in palm the recess and divide into first half recess and second half recess, and first half recess sets up in from bullet support front end middle part, and second half recess sets up in from bullet support rear end middle part, from the front half recess that bullet held in palm with the back half recess combination of the front and back adjacent from bullet support of separating, forms a complete bullet and holds in palm the recess.

The spring support groove is a cylindrical groove, and the axis of the spring support groove coincides with the axis of the self-separating spring support.

The pellets are round pellets.

The contact surface between the split type bullet support unit and the adjacent split type bullet support unit in the same self-separating bullet support is provided with a limiting structure, and the limiting structure is used for limiting the front-back relative movement between the split type bullet support units in the same self-separating bullet support.

The limiting structure is an involute gear.

The invention has the following advantages:

the invention designs the fan-shaped split type bullet support unit, forms the split type bullet support by aligning and encircling the middle part of the split type bullet support unit, and fixes the bullet in the bullet support groove of the split type bullet support, thereby achieving the purpose that when the split type bullet support is arranged in the inner cavity of the light gas gun tube, the split type bullet support units are pressed and fixed under the action of the light gas gun tube, and when the split type bullet support is separated from the light gas gun tube, the split type bullet support units are dispersed. The invention has the advantages of automatic and reliable separation after the bullet holder is separated from the light gas gun barrel and repeated use.

Drawings

FIG. 1 is a schematic view of a split construction of the present invention;

FIG. 2 is a schematic view of a split spring holder unit;

FIG. 3 is a schematic view of the structure of the self-separating sabot;

FIG. 4 is a schematic view of the self-separating sabot after loading into a light gas gun barrel;

fig. 5 is a schematic view of a continuous multi-shot impact loading of a light air cannon of the present invention.

In the drawings, reference numerals are: the light-gas gun barrel 1, the track groove 11, the self-separating bullet holder 2, the bullet holder groove 21, the bullet holder convex pattern 22, the bullet 3, the split bullet holder unit 4 and the involute gear 41.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described and illustrated below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments provided herein, are intended to be within the scope of the present application.

It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar terms herein do not denote a limitation of quantity, but rather denote the singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed or may include additional steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality"/"a number" as used herein refers to two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

As shown in fig. 1, the present embodiment is a reusable self-separating bullet support type light gas gun for simulating continuous impact damage of foreign objects under laboratory conditions, wherein 3 track grooves 11 are processed on the inner side of the light gas gun tube 1, and the track grooves 11 are spiral and serve as guide rails of the self-separating bullet support 2.

The structure of the self-separating bullet holder 2 is shown in fig. 2, the self-separating bullet holder 2 is composed of 3 split bullet holder units 4, the sharp corners of the front end and the rear end of each split bullet holder unit 4 are respectively provided with 1/3 cylindrical grooves, after the 3 split bullet holder units 4 are spliced, one cylindrical groove is formed, the cylindrical groove at the front end is a front half groove, the cylindrical groove at the rear end is a rear half groove, the rear half groove of the front self-separating bullet holder 2 and the front half groove of the rear self-separating bullet holder 2 are combined to obtain a complete bullet holder groove 21 for placing a bullet 3, the length and the diameter of the bullet holder groove 21 can be designed according to the shape and the size of the bullet, the split bullet holder units 4 are provided with involute gears 41 on the contact surfaces of the adjacent split bullet holder units 4 in the same self-separating bullet holder 2, and the involute gears 41 are used for meshing the two adjacent split bullet holder units 4 so as to ensure that the front and rear mutual displacement between the split bullet holder units 4 is not generated;

the assembled self-separating sabot 2 is shown in fig. 3, and the split sabot units 4 are not moved forward and backward due to the involute gear 41, and can be easily separated in the radial direction.

As shown in fig. 4, the assembled self-separating bullet holder 2 is plugged into the light gas gun barrel 1 along the track groove 11, and the assembly of the reusable bullet holder self-separating light gas gun can be completed.

Taking fig. 5 as an example, explaining a method for using the reusable bullet holder self-separating light air cannon:

taking n bullets, the target plate is continuously impacted at the speed v and the interval delta t as an example.

1. Selecting split spring support units 4 with the length of l=v·Δt, wherein the total number of the split spring support units is 3 n;

2. each 3 split-type bullet support units 4 are mutually meshed to form a self-separating bullet support 2, and n self-separating bullet supports 2 are assembled together;

3. placing n shots 3 in the front half grooves of n assembled self-separating receptacles 2;

4. sequentially loading n self-separating bullet holders 2 with the projectiles 3 into the gun barrel along the track grooves 11 of the light gas gun barrel 1;

5. placing a foam target with the same size as the target at the muzzle of the gun barrel;

6. shooting a foam target by a gun, in the process, adjusting the air pressure of a high-pressure light air source to change the speed of shooting the bullet, and simultaneously adjusting the distance d between a gun muzzle and the foam target to prevent a separated bullet holder from striking the foam target;

7. recovering the split spring support unit 4;

8. repeating steps 1-7 until the velocity of the shot bullet is close enough to v and the separated sabot does not hit the foam target;

9. the foam target is removed, and the target to be tested is placed for testing.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.

Claims (10)

1. The utility model provides a repeatedly usable's bullet holds in palm self-separating light gas big gun, includes light gas big gun pipe (1) and pellet (3), characterized by: the bullet support self-separating light gas gun also comprises a self-separating bullet support (2), the self-separating bullet support (2) comprises m split bullet support units (4), the split bullet support units (4) are of a fan-shaped structure with the angle radian of 360 degrees/m, the middle parts of the m split bullet support units (4) are aligned and encircled to form the self-separating bullet support (2), bullet support grooves (21) are formed in the middle parts of the self-separating bullet support (2), the bullet support grooves (21) are used for installing the bullet (3), the bullet support grooves (21) are evenly divided on the split bullet support units (4), the split bullet support units (4) are pressed and fixed under the action of the light gas gun tube (1), and m is a positive integer not smaller than 2 when the self-separating bullet support units (4) are separated from the light gas gun tube (1).

2. The reusable self-separating light gas cannon of claim 1, wherein: m is equal to 3.

3. The reusable self-separating light gas cannon of claim 1, wherein: the light gas gun tube (1) inboard be provided with m track recess (11), split type bullet hold in palm the lateral surface of unit (4) and be provided with bullet that suits with track recess (11) and hold in the palm burr (22).

4. A reusable self-separating light gas cannon of the cradle of claim 3, characterized by: the track grooves (11) are spiral grooves, and correspondingly, the bullet supporting ribs (22) are spiral ribs.

5. The reusable self-separating light gas cannon of claim 1, wherein: the self-separating bomb support (2) is provided with a plurality of self-separating bomb supports (2), and the self-separating bomb supports (2) can be arranged in the light gas gun tube (1) at one time.

6. The reusable self-separating light gas cannon of claim 5, wherein: the bullet support recess (21) divide into first half recess and second half recess, first half recess set up in from bullet support (2) front end middle part, second half recess set up in from bullet support (2) rear end middle part, from bullet support (2) first half recess and the back half recess combination of front and back adjacent from bullet support (2) form a complete bullet support recess (21).

7. The reusable self-separating light gas cannon of claim 6, wherein: the spring support groove (21) is a cylindrical groove, and the axis of the spring support groove (21) coincides with the axis of the self-separating spring support (2).

8. The reusable self-separating light gas cannon of claim 1, wherein: the projectile (3) is a round projectile.

9. The reusable self-separating light gas cannon of claim 1, wherein: the split type bullet holds in palm unit (4) and same from separating bullet hold in palm adjacent split type bullet holds in palm unit (4) contact surface in (2) and is provided with limit structure, limit structure be used for restricting same from separating bullet hold in palm between split type bullet holds in the unit (4) back and forth relative movement in (2).

10. The reusable self-separating light gas cannon of claim 9, wherein: the limiting structure is an involute gear (41).