阅读说明：本技术 一种炮射弹弹底密封结构及粘结方法 (Bullet bottom sealing structure of gun projectile and bonding method ) 是由 赵江涛 齐元景 关岳 韩文超 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种炮射弹弹底密封结构及粘结方法,包括弹体和弹底,所述弹体后端部设有内腔,所述弹体内部尾端开设有环型卡台,所述环型卡台底端端面上沿圆周均布开设有盲孔,所述弹体后端外侧侧壁上沿圆周均布开设有沉头螺孔,所述沉头螺孔内套装有剪切螺钉,所述弹底前端设有与所述弹体尾端开设的卡台相配合的锥面凸台,所述锥面凸台前端端面上开设有与所述卡台底端端面盲孔相对应的销孔,所述销孔内均插装有防旋销。本发明结构简单、造价成本低,安装时方便快捷,安全可靠,不仅解决了新型信息化炮射子母弹在膛内高压高旋环境下密封和止旋可靠的同时,还能够在低压下可靠剪切。(The invention discloses a bullet bottom sealing structure and a bonding method for a gun-shot bullet, which comprises a bullet body and a bullet bottom, wherein the rear end part of the bullet body is provided with an inner cavity, the tail end in the bullet body is provided with an annular clamping table, blind holes are uniformly distributed on the bottom end surface of the annular clamping table along the circumference, countersunk head screw holes are uniformly distributed on the outer side wall of the rear end of the bullet body along the circumference, shearing screws are sleeved in the countersunk head screw holes, the front end of the bullet bottom is provided with a conical boss matched with the clamping table arranged at the tail end of the bullet body, the front end surface of the conical boss is provided with pin holes corresponding to the blind holes on the bottom end surface of the clamping table, and anti-rotation pins are respectively inserted in. The invention has simple structure, low cost, convenient and quick installation, safety and reliability, not only solves the problems of reliable sealing and rotation stopping of the novel informationized gun-shot shrapnel in a high-pressure high-rotation environment in a bore, but also can reliably cut under low pressure.)

1. A gun shooting bullet bottom sealing structure and a bonding method are characterized in that: the bullet comprises a bullet body and a bullet bottom, an inner cavity is formed in the rear end portion of the bullet body, an annular clamping table is arranged at the tail end inside the bullet body, blind holes are evenly formed in the end face of the bottom end of the annular clamping table along the circumference, countersunk head screw holes are evenly formed in the side wall of the outer side of the rear end of the bullet body along the circumference, shear screws are sleeved in the countersunk head screw holes, a conical boss matched with the clamping table arranged at the tail end of the bullet body is arranged at the front end of the bullet bottom, a pin hole corresponding to the blind hole in the end face of the bottom end of the clamping table is formed in the end face of the conical boss, anti-rotation pins are arranged in the pin holes in an inserted mode, an annular groove is formed in the end wall of the conical boss front end, a sealing ring is clamped in the annular groove, and threaded blind holes matched.

2. The bottom sealing structure and the bonding method of the projectile shell of the gun according to claim 1, wherein: the method for sealing and bonding the projectile bottom of the cannon projectile comprises the following steps; the method comprises the following steps: preparing a high-temperature-resistant silicon rubber sealant, an anti-rotation pin and an O-shaped rubber sealing ring before assembly; the anti-rotation pin is arranged in a pin hole on the front end face of the bullet bottom and is in place, and the O-shaped rubber sealing ring is sleeved in the annular groove of the conical boss of the bullet bottom and cannot be turned over; step two: uniformly coating a sealant in a radius range of 5mm around a screw hole at the front end wall of the bullet bottom conical surface boss, in a bullet body countersunk screw hole, on a shearing screw thread, on the inner wall at the tail end of the bullet body, the end surface of a clamping table and the front end surface of the bullet bottom conical surface boss and the outer side wall of the conical surface boss; step three: during assembly, the projectile body is firstly horizontally placed and fixed, then the projectile body bottom conical boss is pushed into an annular clamping table arranged at the tail end inside the projectile body, the anti-rotation pin is ensured to be aligned, the projectile body countersunk head screw hole is aligned with the projectile bottom threaded blind hole, certain external force is applied to the projectile bottom to assist in compressing the sealing ring and installing the projectile bottom in place, and after the projectile body and the projectile bottom are installed in place, the shearing screw is installed to connect the projectile body and the projectile bottom together and lightly wipe redundant sealing agent, so that assembly is completed.

3. The bottom sealing structure and the bonding method of the projectile shell of the gun according to claim 1, wherein: the axis of the countersunk head screw hole on the lateral wall of the outer side of the rear end of the bullet body and the axis of the threaded blind hole on the conical boss at the front end of the bullet bottom form a certain angle with the axis of the bullet.

Technical Field

The invention belongs to the technical field of sealing, bonding and fixing, and particularly relates to a projectile bottom sealing structure and a bonding method of a projectile.

Background

Conventional shrapnel structures generally include a fuse, a projectile cartridge, a projectile body, a projectile base, and a functional load- "bullet" loaded in the projectile body. When the artillery is launched, the primary and secondary guns are popped out of the muzzle, the fuse is used for igniting the propellant kit, the propellant kit generates high-pressure gas to act on the bullet to cut the bottom of the bullet from the bullet body, and therefore the bullet is thrown out, and the bullet function is achieved. In the process, the bullet bottom and bullet body connection structure needs to guarantee that sealing and rotation stopping are reliable in a high-pressure high-rotation environment in a chamber, and when a mother bullet opens a cabin, connection strength needs to be guaranteed to be capable of being reliably cut. In the conventional snap bomb structural design, the connection between the bomb body and the bomb bottom is usually designed as threaded connection, so that the sealing and rotation stopping reliability in a chamber is ensured, but the shearing difficulty of the bomb bottom is increased. The reliable shearing during the opening of the cabin is generally ensured by increasing the propellant quantity and increasing the propellant gas pressure. When the design is adopted, the pressure of the ejection gas is generally above 50MPa, and the thread shearing force is above 30 t.

However, with the development of new information-based functional loads, such as communication interference bullets, radar interference bullets, and the like. In order to meet the task requirement, the contact surface of the bullet and the projectile gas is made of a non-metal material and can only bear small projectile pressure, for example, the projectile pressure is less than 10Mpa, and the shearing force of the bottom of the bullet can only be less than 8t according to the calculation of the internal sectional area of the female bullet body. Under the condition of low-pressure cabin opening, the reliable cabin opening is difficult to ensure by adopting threaded connection between the projectile body and the projectile bottom.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bottom sealing structure and a bonding method of a shot shell, which can reliably open a cabin, of an informationized shot shrapnel under the condition that the shearing force is lower than 8t (low pressure).

In order to achieve the design purpose, the technical scheme adopted by the invention is as follows: a sealing structure for the bottom of bullet shot by gun is composed of bullet body with internal cavity at its back end, the tail end of the inner part of the projectile body is provided with a ring-shaped clamping table, blind holes are uniformly distributed on the end surface of the bottom end of the ring-shaped clamping table along the circumference, countersunk head screw holes are uniformly distributed on the outer side wall of the rear end of the projectile body along the circumference, shear screws are sleeved in the countersunk head screw holes, the front end of the bullet bottom is provided with a conical boss matched with a clamping table arranged at the tail end of the bullet body, the front end face of the conical boss is provided with a pin hole corresponding to the blind hole at the bottom end face of the clamping table, anti-rotation pins are inserted into the pin holes, an annular groove is arranged on the end wall of the front end of the conical boss, the sealing ring is clamped in the annular groove, and threaded blind holes matched with the countersunk head screw holes are uniformly distributed on the right side of the annular groove along the circumference of the front end wall of the conical boss.

The method for sealing and bonding the projectile bottom of the cannon projectile comprises the following steps:

the method comprises the following steps: preparing a high-temperature-resistant silicon rubber sealant, an anti-rotation pin and a sealing ring which meet the requirements of a product drawing before assembly; the anti-rotation pin is arranged in a pin hole on the front end face of the bullet bottom and is in place, and the sealing ring is sleeved in the annular groove of the cone boss of the bullet bottom and cannot be turned over;

step two: uniformly coating a sealant in a radius range of 5mm around a screw hole at the front end wall of the bullet bottom conical surface boss, in a bullet body countersunk screw hole, on a shearing screw thread, on the inner wall at the tail end of the bullet body, the end surface of a clamping table and the front end surface of the bullet bottom conical surface boss and the outer side wall of the conical surface boss;

step three: during assembly, the projectile body is firstly horizontally placed and fixed, then the projectile body bottom conical boss is pushed into an annular clamping table arranged at the tail end inside the projectile body, the anti-rotation pin is ensured to be aligned, the projectile body countersunk head screw hole is aligned with the projectile bottom threaded blind hole, certain external force is applied to the projectile bottom to assist in compressing the sealing ring and installing the projectile bottom in place, and after the projectile body and the projectile bottom are installed in place, the shearing screw is installed to connect the projectile body and the projectile bottom together and lightly wipe redundant sealing agent, so that assembly is completed.

The axis of the countersunk head screw hole on the lateral wall of the outer side of the rear end of the bullet body and the axis of the threaded blind hole on the conical boss at the front end of the bullet bottom form a certain angle with the axis of the bullet.

The invention has the beneficial effects that: the sealing structure of the bullet bottom and the bullet body adopts a mode that a conical surface is matched with a sealing ring and a sealant is combined, so that the bullet bottom can be smoothly loaded with the bullet body, the forced deformation of the rubber sealing ring after the bullet bottom is installed in place can be ensured to meet the requirement, and the bullet bottom is sealed under a high-pressure environment; a plurality of anti-rotation pins parallel to the elastic shaft are arranged on the bottom end surface of the elastic body, so that rotation stopping is ensured in a high-rotation environment, the shearing screw is protected from being rotationally sheared, and the action of axial thrust on the shearing screw is not influenced under a low-pressure cabin opening condition; the shear screws which are uniformly distributed are obliquely arranged on the bullet bottom and the bullet body matching surface, so that axial tension can be generated, the bullet bottom is always pressed to the bullet body, the forced deformation of the rubber sealing ring is ensured, and the sealing effect is ensured. The invention has simple structure, low cost, convenient and quick installation, safety and reliability, not only solves the problems of reliable sealing and rotation stopping of the novel informationized gun-shot shrapnel in a high-pressure high-rotation environment in a bore, but also can reliably cut under low pressure.

Drawings

Fig. 1 is a schematic view of a projectile bottom sealing structure of a cannonball of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. As shown in fig. 1: a bullet bottom sealing structure and a bonding method for a gun-shot bullet comprise a bullet body 1 and a bullet bottom 2, wherein the rear end part of the bullet body 1 is provided with an inner cavity, the tail end of the inside of the projectile body 1 is provided with a ring-shaped clamping table, blind holes 3 are uniformly distributed on the end surface of the bottom end of the ring-shaped clamping table along the circumference, countersunk head screw holes 4 are uniformly distributed on the outer side wall of the rear end of the projectile body 1 along the circumference, shear screws 5 are sleeved in the countersunk head screw holes 4, the front end of the bullet bottom 2 is provided with a conical boss matched with a clamping platform arranged at the tail end of the bullet body 1, the front end face of the conical boss is provided with a pin hole 6 corresponding to the blind hole 3 at the bottom end face of the clamping table, anti-rotation pins 7 are inserted into the pin holes 6, an annular groove 8 is arranged on the end wall of the front end of the conical boss, a sealing ring is clamped in the annular groove 8, and threaded blind holes 9 matched with the countersunk head screw holes 4 are uniformly formed in the right side of the annular groove 8 on the front end wall of the conical boss along the circumference.

The method for sealing and bonding the projectile bottom of the cannon projectile comprises the following steps:

the method comprises the following steps: preparing a high-temperature-resistant silicon rubber sealant, an anti-rotation pin 7 and a rubber sealing ring which conform to the requirements of product drawings before assembly; the anti-rotation pin 7 is arranged in the pin hole 6 on the front end face of the bullet bottom 2 and is in place, and the sealing ring is sleeved in the annular groove 8 of the conical boss of the bullet bottom 2 and cannot be turned over;

step two: uniformly smearing a sealant on the periphery of a screw hole 9 at the front end wall of the conical boss of the bullet bottom 2 within a radius of 5mm, in a countersunk screw hole 4 of the bullet body 1, on the thread of a shear screw 5, on the inner wall at the tail end of the bullet body 1, the end surface of a clamping table, the front end surface of the conical boss of the bullet bottom 2 and the outer side wall of the conical boss;

step three: during assembly, the projectile body 1 is firstly placed horizontally and fixed, then the conical boss of the projectile bottom 2 is pushed into an annular clamping table arranged at the tail end inside the projectile body 1, the anti-rotation pin 7 is ensured to be aligned, the countersunk head screw hole 4 of the projectile body 1 is aligned with the threaded blind hole 9 of the projectile bottom, certain external force is applied to the projectile bottom 2 to assist in compressing the sealing ring and installing the projectile bottom 1 in place, and after the projectile body 1 and the projectile bottom 2 are installed in place, the shear screw 5 is installed to connect the projectile body 1 and the projectile bottom 2 together and lightly wipe redundant sealant, so that assembly is completed.

The axis of the 4 holes of the countersunk head screw hole on the outer side wall of the rear end of the bullet body 1 and the axis of the 9 holes of the threaded blind hole on the conical boss at the front end of the bullet bottom 2 form a certain angle with the axis of the bullet.

When the invention is used, in the process of assembling the bullet bottom 2 into the bullet body 1 along the axis of the bullet body 1, due to the existence of the annular clamping table arranged at the tail end inside the bullet body 1 and the conical boss at the front end of the bullet bottom 2, the deformation amount of the sealing ring is gradually increased from small to large, the bullet bottom 2 can be ensured to be smoothly aligned and loaded into the bullet body 1, and the forced deformation amount of the sealing ring can meet the requirement after the bullet bottom is installed in place, the anti-rotation pin 7 is arranged in the blind hole 3 of the bullet body 1 and the pin hole 6 of the bullet bottom 5 and is used for stopping rotation in a high rotation state and protecting the shear screw 5 from being sheared by rotation torque, and under the condition of low-pressure cabin opening, the shearing action of axial thrust on the shear screw 5 is not influenced, the shear screw 5 is obliquely arranged in the countersunk head screw hole 4 of the bullet body 1 and the threaded blind hole 9 of the bullet bottom 2 to connect the bullet body 1 and the bullet bottom 2 together, guarantee at the bottom of the bullet 2 and be pressed to projectile body 1 all the time, guarantee the forced deflection of sealing washer, guarantee sealed effect, in addition, during the assembly, will play at the bottom of 2 about 5mm radius within ranges around the screw blind hole 9, in projectile body 1 countersunk head screw 4, on shear screw 5 screw threads, all need to scribble sealant on projectile body 1 tail end inner wall and ka tai terminal surface and 2 conical surface boss front end terminal surfaces and the conical surface boss lateral wall at the bottom of the bullet, and the assembly back is cleaned redundant sealant can.