阅读说明：本技术 一种可形成梯度激活活性侵爆杆体的聚能装药结构 (Can form gradient activation activity and invade shaped charge structure of exploding body of rod ) 是由 郑元枫 王海福 葛超 余庆波 赵宏伟 汪德武 李培亮 苏成海 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种可形成梯度激活活性侵爆杆体的聚能装药结构。本发明中的聚能装药结构简单,使用方便,工艺性好,大曲率高密度活性药型罩与小曲率梯度激活活性药型罩皆为球缺形药型罩,能够形成气动特性稳定的活性侵爆杆体。通过大曲率高密度活性药型罩和小曲率梯度激活活性药型罩两者之间的曲率匹配,可形成前端密度高、后端密度低的活性侵爆杆体。(The invention discloses an energy-gathering charge structure capable of forming a gradient activation active explosive-invasion rod body. The energy-gathering explosive charge has the advantages of simple structure, convenient use and good manufacturability, and the large-curvature high-density active explosive type cover and the small-curvature gradient activation active explosive type cover are both spherical segment shaped explosive type covers, so that an active explosive-invasion rod body with stable pneumatic characteristics can be formed. The curvature matching between the active shaped charge liner with high curvature and high density and the active shaped charge liner with small curvature gradient is activated, so that an active explosive-invasion rod body with high front end density and low rear end density can be formed.)

1. A shaped charge configuration capable of forming a gradient activated explosive body, comprising: initiating mechanism (1) The shell (2), the main charge (3) and the active charge liner; the active liner comprises a high-density active liner (4) and a gradient activation active liner (5); wherein the density of the high-density active shaped charge liner (4) is not less than 4.5g/cm³(ii) a The gradient activation active liner (5) is composed of a plurality of layers of active liners with sequentially reduced activation thresholds; the high-density active shaped charge liner (4) and the gradient activated active shaped charge liner (5) are both in a segment shape, and the curvature of the high-density active shaped charge liner (4) is greater than that of the gradient activated active shaped charge liner (5); the center of the active liner (5) is opened by gradient activation, and the high-density active liner (4) is embedded in the opening;

the main charge (3) is a cylinder, one end of the main charge is connected with the initiation mechanism (1), and the other end of the main charge is provided with a groove matched with the shape of the active charge liner and tightly attached to the active charge liner; the shell is wrapped on the outer surfaces of the initiation mechanism (1) and the main charge (3).

2. The shaped charge configuration for forming a gradient activated explosive body according to claim 1, further comprising a compression screw (6), wherein the main charge (3) is press-fitted by the compression screw (6) through the gradient activated explosive shaped cap (5).

3. The shaped charge structure capable of forming the gradient activation active detonation rod body according to claim 1, wherein the main charge (3) is formed by high-energy explosive through die press-fitting, the detonation velocity is greater than or equal to 8000m/s, the length-diameter ratio of the main charge (3) is 0.8-1.2, and the single-point center detonation is realized through a detonation mechanism 1.

4. The shaped charge configuration for forming a gradient activated explosive body according to claim 1, wherein the high density active liner (4) has a relative value of radius of curvature of 1.0 to 2.0.

5. The shaped charge configuration capable of forming a gradient activated active detonation rod body according to claim 1 or 4, characterised in that said high density active liner (4) is a high density fluoropolymer based active liner or a NiAl alloy active liner.

6. The shaped charge structure capable of forming a gradient activation active detonation rod body according to claim 5, characterized in that the high-density active liner (4) is formed by pressing and sintering mixed powder of PTFE, W, Cu and Al.

7. The shaped charge configuration capable of forming a gradient activated explosive body according to claim 1, wherein the relative value of the radius of curvature of the gradient activated explosive shaped charge liner (5) is 0.6-1.0.

8. The shaped charge configuration capable of forming a gradient activated explosive body according to claim 1 or 7, wherein each of the active shaped charge liners (5) is made of fluoropolymer-based energetic mixed powder, and the control of the activation threshold is achieved by adjusting the inorganic matter content in the fluoropolymer-based energetic mixed powder.

9. The shaped charge configuration for forming a gradient activated explosive body according to claim 8, wherein each active liner of said gradient activated active liner (5) is based on PTFE powder filled with a certain amount of Al powder and Fe, an inorganic material₂O₃By adjusting Fe₂O₃The gradient activation control of each layer of active liner is realized.

10. The shaped charge configuration for forming a gradient activated explosive body according to claim 8, wherein the active charge configuration comprises a plurality of layers of active charge configurations respectively pressed by a fractional forming method, and then sintered and mechanically processed to obtain the gradient activated active charge configuration (5).

Technical Field

The invention relates to the technical field of shaped charge, in particular to an shaped charge structure capable of forming a gradient activated active explosive-invasion rod body, which can form an active explosive-invasion rod body with penetration depth and explosion effect.

Background

With the increasing need of military on efficiently striking the body functional concrete/reinforced concrete hard targets such as airport runways, large bridges, dam dams and the like in modern battlefields, the type and the application range of the striking targets of the energy-gathering warheads are expanded, and simultaneously, new challenging requirements on the damage mechanism, the damage mode and the damage capacity are provided. From the viewpoint of efficient damage, the requirements for the damage efficiency and the damage mode of the warhead are more important to have strong implosion capability when hitting the functional concrete/reinforced concrete hard target of the body, which is difficult to be realized by metal jet or Explosion Formed Projectile (EFP).

In more than ten years, a new energy-gathering damage technology concept is proposed and developed, and a new technical approach is provided for solving the problem of insufficient damage capability of the energy-gathering warhead reverse body functional concrete/reinforced concrete hard target. The energy-gathering damage technology is remarkably different from a single kinetic energy penetration damage mechanism of the traditional metal jet flow or EFP, and has the main advantages that the active shaped charge cover is adopted to replace the metal shaped charge cover of the active energy-gathering warhead, the active shaped charge cover forms an explosive-gathering damage element (jet flow or EFP) which has good penetration capability and can generate explosive damage under the driving of the explosive pressure of energy-gathering charge, the combined action of two mechanisms of 'kinetic energy penetration and explosive damage' unique to the explosive-gathering damage element is utilized to strike the functional concrete/reinforced concrete hard target of a body, the high-efficiency damage capability similar to that of the traditional energy-gathering-blasting two-stage series follow-up warhead can be exerted through the single-stage warhead, and the energy-gathering warhead can exert the combined high-efficiency damage effect on the premise of greatly reducing the complexity of a warhead system.

However, active liner technology also faces certain technical problems, mainly manifested in: the low-density active shaped charge liner has high explosive power, but the density, the strength and the ductility are not ideal enough, so that the corresponding active jet flow can generate strong explosive effect, but the penetration capability is seriously insufficient.

In addition, the traditional energy-gathering-blasting two-stage series connection follow-up warhead structure is very complex, and the problems of explosion suppression, front-stage and rear-stage fuze matching and the like need to be considered; meanwhile, the series-connection follow-up warhead has large mass and structure and is difficult to adapt to the development trend of ammunition miniaturization.

Disclosure of Invention

In view of the above, the invention provides an energy-collecting charge structure capable of forming a gradient activation active explosive-invasion rod body, which can realize an explosive-invasion coupling damage effect through a single-stage energy-collecting charge structure and give consideration to both penetration depth and implosion effect on a body functional concrete/reinforced concrete hard target.

The invention discloses a shaped charge structure capable of forming a gradient activation active explosive-invasion rod body, which comprises: the explosive device comprises an initiation mechanism, a shell, main charge and an active charge type cover;

wherein the active liner consists of a high-density active liner and a gradient activation active liner; the high-density active liner and the gradient activated liner are both in a spherical segment shape and equal in wall thickness, and the curvature of the high-density active liner is larger than that of the gradient activated liner. The middle part of the gradient activation active shaped charge liner is provided with a hole, the size of the hole is ensured to ensure that the high-density active shaped charge liner is just embedded into the hole, and the annular contact surfaces of the high-density active shaped charge liner and the hole are tightly attached; wherein the density of the high-density active shaped charge liner is not less than 4.5g/cm³(ii) a The gradient activated liner is composed of a plurality of layers of activated liners with sequentially reduced activation thresholds.

The shell is a stepped shaft-shaped circular tube, and the small end of the shell is provided with an initiation mechanism for initiating the main charge; the big end is filled with main charge;

the main charge is cylindrical as a whole, one end of the main charge is a plane, the other end of the main charge is provided with a segment-shaped groove, the curvature radius of the segment-shaped groove is the same as that of the outer surface of the active charge liner, namely, the segment-shaped groove in the center has the same curvature radius as that of the high-density active charge liner, and the segment-shaped grooves around the center have the same curvature radius as that of the gradient active charge liner. The main charge is coaxially filled in the inner cavity of the large end of the shell, so that the planar end of the main charge is tightly attached to the inner bottom surface of the shell, and the concave surface of the main charge is tightly attached to the high-density active charge liner and the gradient activation active charge liner through the shellac. At the large opening end of the shell, the main charge is compressed and matched by a pressing screw through a gradient activated shaped charge cover.

Furthermore, the main explosive is generally formed by high-energy explosives such as JH-2, JO-8 and the like through die pressing, the detonation velocity is generally more than 8000m/s, the length-diameter ratio of the explosive column is about 0.8-1.2, and single-point center detonation is carried out through the detonation mechanism.

Furthermore, the shell is made of low-density materials such as metal aluminum or nonmetal nylon, polyethylene and the like. The housing serves on the one hand to secure and protect the initiation mechanism, the main charge and the shaped charge liner, and on the other hand to increase the energy efficiency of the main charge.

Further, the relative value of the curvature radius (the ratio of the curvature radius to the charge diameter) of the high-density active shaped charge liner is generally 1.0-2.0; from the formulation angle, the high-density fluoropolymer-based active liner can be used as a high-density fluoropolymer-based active liner, and can also be used as a NiAl alloy active liner. From the preparation angle, the active liner sample is obtained after the energy-containing mixed powder is uniformly mixed, pressed and sintered.

Further, the curvature radius relative value of the gradient activated shaped charge liner is generally 0.6-1.0; the active liner layers in the active liner are activated in a gradient mode, and the activation threshold value from inside to outside is gradually reduced (the innermost layer is close to the main charge). From the aspect of a formula, each layer of the active shaped charge liner in the gradient activated shaped charge liner is formed by pressing and sintering fluoropolymer-based energetic mixed powder, and the control of an activation threshold is realized by adjusting the mass content of inorganic substances in the fluoropolymer-based energetic mixed powder. From the preparation angle, the related powder of each layer of active shaped charge liner related to the gradient activated active shaped charge liner is respectively and uniformly mixed, then the mixture is obtained by pressing through a fractional forming method, and then the gradient activated active shaped charge liner sample can be obtained through sintering and machining.

Furthermore, the pressing screw is of a circular ring structure and made of a high-density metal material and is used for fixing the main charge and the active charge liner and preventing the main charge and the active charge liner from sliding off from the large end of the shell.

Has the advantages that:

(1) the energy-gathering explosive charge has the advantages of simple structure, convenient use and good manufacturability, and the large-curvature high-density active explosive type cover and the small-curvature gradient activation active explosive type cover are both spherical segment shaped explosive type covers, so that an active explosive-invasion rod body with stable pneumatic characteristics can be formed. The curvature matching between the active shaped charge liner with high curvature and high density and the active shaped charge liner with small curvature gradient is activated, so that an active explosive-invasion rod body with high front end density and low rear end density can be formed.

(2) The small-curvature gradient activated active liner 5 consists of a plurality of layers of active liners, and the activation threshold values of the active liners from inside to outside are gradually reduced in a gradient manner, so that the active explosive-immersed rod body is not subjected to excessively severe chemical reaction in the forming process, the finally formed active explosive-immersed rod body is high in energy content, and the explosive effect is conveniently exerted.

(3) When the active penetration rod body formed by the invention acts on the body functional concrete/reinforced concrete hard target, the high-density penetration body at the head part can realize large penetration on the body functional concrete/reinforced concrete hard target, the high-energy penetration body at the rear part can explode in the body functional concrete/reinforced concrete hard target, and the comprehensive damage effect on the target is improved by utilizing the explosion effect.

Drawings

Figure 1 is a schematic of the structure of a shaped charge configuration of the present invention.

Fig. 2 is a schematic view of the housing structure of the present invention.

FIG. 3 is a schematic diagram of a main charge of the present invention.

FIG. 4 is a schematic view of the structure of the high density active liner of the present invention.

FIG. 5 is a schematic diagram of a gradient activated liner according to the present invention.

Fig. 6 is an active explosive-piercing rod body formed by the shaped charge structure of the present invention.

FIG. 7 is a schematic diagram of the destructive effect of the active explosive-invaded rod body formed in the present invention on the body functional concrete target explosive-invaded coupling. Wherein, (a) is an active explosive-immersed rod body forming indication; (b) the penetration of the active explosive penetration rod body to the body functional concrete target is indicated; (c) the target body fragmentation is indicated by the fact that detonation occurs in the body functional concrete target.

The explosive comprises 1-an initiating mechanism, 2-a shell, 3-main charge, 4-a high-density active charge liner, 5-a gradient activated active charge liner and 6-a pressing screw.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides an energy-gathered charging structure capable of forming a gradient activation activity invasion and explosion rod body, wherein the activity invasion and explosion rod body formed by the structure has both large penetration depth and strong implosion damage, and can realize the efficient damage of invasion and explosion coupling of a body functional concrete/reinforced concrete hard target. Meanwhile, the structure is simple, the manufacturability is good, and the practicability is high.

As shown in fig. 1, the shaped charge structure comprises: the explosive device comprises an initiation mechanism 1, a shell 2, a main charge 3, a large-curvature high-density active charge liner 4, a small-curvature gradient activated active charge liner 5 and a pressing screw 6. Wherein, the high-curvature high-density active liner 4 and the low-curvature gradient active liner 5 are both equal-wall-thickness active liners; the middle part of the active shaped charge liner 5 is activated by small curvature gradient, and the opening ensures that the active shaped charge liner 4 with large curvature and high density is just embedded into the active shaped charge liner, and the annular contact surfaces of the active shaped charge liner and the active shaped charge liner are tightly attached; the shell 2 is a stepped shaft-shaped circular tube, two ends of the shell are respectively provided with an opening, and the small end of the shell is provided with an initiation mechanism 1 for initiating the main charge; the main charge 3 is cylindrical as a whole, one end of the main charge is provided with a segment-shaped groove, the other end of the main charge is a plane, and the main charge 3 is coaxially filled in an internal cavity at the large end of the shell 2, so that the plane end of the main charge 3 is tightly attached to the inner bottom surface of the shell 2; the concave surface at the other end of the main charge 3 consists of two segment-shaped concave surfaces, the concave surface positioned in the center and the large-curvature high-density active shaped charge cover 4 have the same curvature radius, and the central concave surface is tightly attached to the convex surface of the large-curvature high-density active shaped charge cover 4; the surrounding concave surface has the same radius of curvature as the small curvature gradient activated liner 5, and the surrounding concave surface is closely attached to the small curvature gradient activated liner 5 convex surface. The main charge 3 is activated by the big opening end of the shell 2 through small curvature gradient and is pressed and matched by the pressing screw 6.

As shown in fig. 2, the housing 2 is made of LY12 hard aluminum, the lateral thickness of the housing is 10mm, the housing 2 has the advantages of low density, high strength and the like, and can fix and protect the initiation mechanism 1, the main charge 3, the high-curvature high-density active charge liner 4 and the low-curvature gradient activated active charge liner 5, and meanwhile, the energy utilization rate of the main charge is improved.

As shown in figure 3, the main charge 3 adopts 8701 explosive, the charge length is 170mm, the charge aperture is 150mm, and the charge density is 1.71g/cm³. The main charge 3 is detonated by the single-point center of the detonating mechanism 1 to generate detonation waves and detonation products to act on the shaped charge liner.

As shown in fig. 4, the large curvature high density active liner 4 is made of a mixed powder of PTFE, W, Cu, and Al by pressing and sintering. The pressing specific pressure is 600MPa, and the sintering is carried out in an inert gas atmosphere. The mass fractions of PTFE, W, Cu and Al were 15%, 40%, 30% and 15%, respectively. The wall thickness of the sintered high-curvature high-density active shaped charge liner is 10mm, the curvature radius is 150mm, the outer diameter is 50mm, and the density is 5.3g/cm³。

As shown in fig. 5, the active shaped charge liner 5 with small curvature gradient is formed by pressing and sintering fluoropolymer-based active mixed powder. In the embodiment, the small curvature gradient activated shaped charge liner 5 comprises 4 layers, each layer takes PTFE powder as a matrix, and a certain amount of Al powder and inorganic substance Fe are filled in the PTFE powder₂O₃(ii) a By adjusting Fe₂O₃The mass fraction of the Fe-based active charge liner realizes the gradient activation control of 4 layers of liners in the small-curvature gradient activated active charge liner 5, and the Fe in the 4 layers of liners from inside to outside₂O₃Respectively at 0%, 5%, 10% and 15%, and the corresponding activation threshold value is gradually reduced in gradient. The design ensures that the innermost layer of the small-curvature gradient activated active charge liner close to the explosive does not generate excessively violent chemical reaction in advance in the forming process, and simultaneously considers the small-curvature gradient activated active chargeThe whole of the hood contains energy. The method adopts a layered pressing method, the pressing specific pressure is 400MPa, and the sintering is carried out in an inert gas atmosphere. The wall thickness of the sintered small curvature gradient activated active shaped charge liner is 16mm, the curvature radius is 90mm, and the outer diameter is 150 mm. Subsequently, a center hole having a diameter of 50mm was hollowed out centering on the axis by machining.

The working principle of the energy-gathering charge structure is as follows: after the energy-gathered charge structure is detonated at a certain distance from a target, the main charge 3 starts to explode, then detonation waves generated by the detonation of the main charge 3 are spread inside, when the detonation waves are spread to the high-curvature high-density active explosive type cover 4, the top of the cover is crushed, the top of the cover deforms to form the head of a high-density active explosive-invasion rod body, and then the detonation waves are spread to the small-curvature gradient activated active explosive type cover 5 to form the tail of the gradient activated active explosive-invasion rod body. The active invasion explosion rod body head part formed by the active invasion explosion rod body 4 with large curvature and high density firstly has strong penetration capability, so that the body functional concrete/reinforced concrete hard target is deeply penetrated, furthermore, the active invasion explosion rod body tail part formed by the active invasion explosion rod body 5 with small curvature gradient has strong implosion effect, and after the active invasion explosion rod body tail part enters the body functional concrete/reinforced concrete hard target along with the inside of the body functional concrete/reinforced concrete hard target, a large amount of chemical energy and gas products are released in the target, so that the damage effect on the body functional concrete/reinforced concrete hard target is greatly improved. In this embodiment, the 150mm charging aperture energy-gathered charging structure provided by the invention has the advantages that the formed active explosive-intruding rod body acts on the body functional concrete/reinforced concrete hard target with the thickness of 1.5m × 1.5m × 1.8m, so that the whole body functional concrete/reinforced concrete hard target is completely cracked, and the damage effect is very ideal.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.