Torpedo silencing device

Abstract

The utility model belongs to the technical field of mute torpedoes, and provides a torpedo silencing device which comprises a metal layer, a silencing layer and a waterproof layer, and the metal layer is arranged on the outer wall of a torpedo; the metal layer comprises an inner partition plate, a dot matrix layer and a spacing plate which are sequentially arranged from inside to outside, and the dot matrix layer forms a metal dot matrix structure between the inner partition plate and the spacing plate; the silencing layer is arranged on the outer side of the partition plate and comprises circular truncated cones arranged at intervals, and one face of each circular truncated cone is connected with the silencing layer. The waterproof layer is arranged on the silencing layer, and the other face of the circular truncated cone is connected with the waterproof layer. While the noise and vibration of the torpedo are shielded, when sound waves emitted by the enemy active sonar are transmitted to the vicinity of the torpedo, the silencing layer and the metal layer can absorb a part of the sound waves, so that effective echoes received by the enemy sonar are reduced, the target characteristics of the torpedo in our part are reduced, and the service life of the torpedo in our part is prolonged. And the sound stealth capability of the torpedo under the active sonar search of the enemy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silent torpedoes, in particular to a torpedo silencing device. Background Art

[0002] Torpedoes travel underwater throughout the entire process, and the current means of underwater detection in various countries are mainly active / passive sonar detection. Other detection methods such as magnetic detection, infrared detection, and electromagnetic wave detection have limited detection effects on small, high-speed underwater maneuvering targets such as torpedoes. According to relevant literature, the survival probability of surface ships facing incoming torpedoes is greatly affected by the torpedo alarm distance and the alarm side angle. Under most alarm side angles, the increase in the torpedo alarm distance can increase the survival probability of surface ships. Conversely, improving the acoustic stealth performance of torpedoes reduces the effective detection distance of enemy sonars and increases the probability of our torpedoes hitting.

[0003] The design concept of traditional silent torpedoes is mainly based on shielding the noise and vibration of the torpedo itself. Measures adopted abroad include replacing low-noise torpedo engines and transmission systems, applying vibration-absorbing and damping coatings, installing shock absorbers, and using composite material shells. However, these measures only consider the sound insulation and vibration suppression of the torpedo itself, but do not consider the absorption of enemy active sonar sound waves. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a torpedo silencing device to solve the problem that the current silent torpedo only considers the sound insulation and vibration suppression of the torpedo itself, but ignores the absorption of the enemy's active sonar sound waves.

[0005] The utility model provides a torpedo silencing device, comprising:

[0006] A metal layer is arranged on the outer wall of the torpedo; the metal layer comprises an inner partition, a lattice layer and a spacer plate arranged in sequence from the inside to the outside, and the lattice layer forms a metal lattice structure between the inner partition and the spacer plate;

[0007] A sound-absorbing layer is arranged on the outer side of the partition plate, and the sound-absorbing layer includes truncated cones arranged at intervals, and one side of the truncated cones is connected to the sound-absorbing layer;

[0008] A waterproof layer is arranged on the sound-absorbing layer, and the other side of the truncated cone is connected to the waterproof layer.

[0009] It can be seen from the above technical scheme that the utility model provides a torpedo silencing device. When a torpedo is launched, its power system starts to operate, and the noise generated by the power system propagates outward. First, a part of the noise is absorbed by the metal layer of the silencing shell. The noise that is not absorbed or reflected continues to propagate outward, and a part of it is absorbed by the silencing layer again, and finally transmitted to the sea water. The noise of our torpedo that may be detected by the enemy's passive sonar will be significantly reduced after two layers of attenuation, and the noise inside the torpedo body can be effectively isolated; when the sound waves emitted by the enemy's active sonar propagate to the vicinity of the torpedo, the silencing layer and the metal layer can absorb a part of the sound waves, so that the effective echo that the enemy sonar can receive is reduced, thereby reducing the target characteristics of our torpedo and improving the acoustic stealth capability of the torpedo under the enemy's active sonar search.

[0010] Optionally, the inner baffle, the lattice layer and the spacer are all made of aluminum alloy, thereby providing the shell with sufficient strength and rigidity to withstand high pressure underwater.

[0011] Optionally, the silencing layer and the waterproof layer are both made of rubber. The silencing layer is made of rubber to suppress vibration, and the waterproof layer is made of rubber to prevent seawater from entering the gaps between the truncated cones of the silencing layer.

[0012] Optionally, the lattice layer is a symmetrically arranged double pyramid structure.

[0013] Optionally, the lattice layer includes a lattice core arranged at intervals, the lattice core includes eight rods, one ends of the rods are connected to each other and have a common node, and the other ends of the rods are respectively connected to the inner partition plate or the partition plate.

[0014] Optionally, the diameter of the top surface of the truncated cone is smaller than the diameter of the bottom surface of the truncated cone, the top surface of the truncated cone is connected to the spacer, and the bottom surface of the truncated cone is connected to the waterproof layer.

[0015] Optionally, two sides of the projection surface of the truncated cone are convex arcs.

[0016] By adopting the above technical solution, this application has the following technical effects:

[0017] The utility model provides a torpedo silencing device. When a torpedo is launched, its power system starts to operate, and the noise generated by the power system propagates outwards. First, a part of the noise is absorbed by the metal layer. The noise that is not absorbed or reflected continues to propagate outwards, and a part of it is absorbed by the silencing layer again, and finally transmitted to the seawater. The noise of our torpedo that may be detected by the enemy's passive sonar will be significantly reduced after experiencing two layers of attenuation, and the noise inside the torpedo body can be effectively isolated.

[0018] The utility model provides a torpedo silencing device. When the sound waves emitted by the enemy's active sonar propagate to the vicinity of the torpedo, the silencing layer and the metal layer can both absorb a part of the sound waves, so that the effective echoes that can be received by the enemy's sonar are reduced, thereby reducing the target characteristics of our torpedo and improving the acoustic stealth capability of the torpedo under the enemy's active sonar search. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 A three-dimensional diagram of a torpedo silencing device provided by an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The front view of the torpedo silencer is shown;

[0022] Figure 3 for Figure 2 AA section view.

[0023] Reference numerals:

[0024] 1-metal layer; 11-inner partition; 12-lattice layer; 121-lattice core; 13-partition board; 2-noise-absorbing layer; 21-truncated cone; 3-waterproof layer. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] like Figure 1-3 As shown, this embodiment provides a torpedo silencing device, including a metal layer 1, a silencing layer 2 and a waterproof layer 3, wherein the metal layer 1 is arranged on the outer wall of the torpedo; the metal layer 1 includes an inner partition 11, a lattice layer 12 and a partition plate 13 arranged in sequence from the inside to the outside, and the lattice layer 12 forms a metal lattice structure between the inner partition 11 and the partition plate 13; the silencing layer 2 is arranged on the outer side of the partition plate 13, and the silencing layer 2 includes a frustum 21 arranged at intervals, and one side of the frustum 21 is connected to the silencing layer 2; the waterproof layer 3 is arranged on the silencing layer 2, and the other side of the frustum 21 is connected to the waterproof layer 3.

[0030] When a torpedo is launched, its power system starts to operate, and the noise generated by the power system propagates outward. First, a part of it is absorbed by the metal layer 1. The noise that is not absorbed or reflected continues to propagate outward, and a part of it is absorbed by the anechoic layer 2, and finally transmitted to the sea water. The noise of our torpedo that may be detected by the enemy's passive sonar will be significantly reduced after experiencing two layers of attenuation, which can effectively isolate the noise inside the torpedo body; when the sound waves emitted by the enemy's active sonar propagate near the torpedo, the anechoic layer 2 and the metal layer 1 can both absorb a part of the sound waves, reducing the effective echo that the enemy sonar can receive, thereby reducing the target characteristics of our torpedo and improving the stealth capability of the torpedo under the enemy's active sonar search.

[0031] Optionally, the inner partition 11, the lattice layer 12 and the spacer 13 are all made of aluminum alloy, thereby providing the shell with sufficient strength and rigidity to withstand high pressure underwater. The anechoic layer 2 and the waterproof layer 3 are both made of rubber. The anechoic layer 2 is made of rubber to suppress vibration; the waterproof layer 3 is made of rubber to prevent seawater from entering the gap between the truncated cones 21 of the anechoic layer 2.

[0032] Among them, the metal layer 1 is manufactured by integrated additive manufacturing, the rubber material of the silencing layer 2 and the waterproof layer 3 is manufactured in one piece, and then the metal layer and the rubber part are connected by bonding or the like. At the same time, the torpedo silencing device provided in this embodiment can cover the entire surface of the torpedo except the torpedo head sonar array deflector and the torpedo tail propulsion device as much as possible in specific applications to ensure the stealth effect of the torpedo.

[0033] like Figure 2-3 As shown, the lattice layer 12 is a symmetrically arranged double pyramid structure. The lattice layer 12 is both a structural material and a functional material; it is itself used as the backing of the silencing layer 2 and is made of high-strength aluminum alloy, providing sufficient strength and rigidity for the torpedo silencing device, and can withstand underwater high pressure; at the same time, the metal layer 1 adopts a lattice structure, and the internal cavity is conducive to sound absorption.

[0034] Optionally, the lattice layer 12 includes a lattice core 121 arranged at intervals, and the lattice core 121 includes eight rods, one end of the rods are connected to each other and have a common node, and the other end of the rods are respectively connected to the inner partition 11 or the partition plate 13.

[0035] In a possible implementation, the surface of each lattice core 121 of the lattice layer 12 is also coated with a sound-absorbing coating. The lattice structure has a wide surface area, and coating the sound-absorbing coating thereon can further improve its sound-absorbing performance.

[0036] Optionally, the top diameter of the truncated cone 21 is smaller than the bottom diameter of the truncated cone 21, the top surface of the truncated cone 21 is connected to the partition plate 13, and the bottom surface of the truncated cone 21 is connected to the waterproof layer 3. The sound absorbing layer 2 has a composite gradual sound absorbing structure with trumpet-shaped cavities between the truncated cones 21 and the truncated cones 21. Optionally, the projection surface of the truncated cone 21 has two convex arcs on both sides.

[0037] The technical solution of this embodiment has the following beneficial effects:

[0038] 1. The torpedo silencing device provided in this embodiment can not only greatly reduce the radiation noise of the torpedo after launch in the passive listening frequency band of the mainstream torpedo alarm sonar, but also weaken the target strength of the torpedo, thereby shortening the detection distance of other active sonar systems to the torpedo. Under the combined effect, it is difficult for the enemy's integrated anti-submarine system to quickly complete the side angle resolution and target motion analysis of the incoming torpedo, and thus it is difficult to evade maneuvers and take hydroacoustic countermeasures (launching hydroacoustic decoys or anti-torpedo torpedoes, etc.) in time.

[0039] 2. Compared with the metal foam materials used for silencing in the prior art, the metal lattice structure has controllable performance, and its strength and modulus are one order of magnitude higher than those of metal foam materials, with higher load-bearing efficiency, making it suitable for torpedoes to carry out high-speed assaults at great depths.

[0040] 3. The lattice structure of the lattice layer is porous and can be 3D printed. Its structure can be precisely designed using computer equipment, thereby achieving efficient absorption of the internal noise of the torpedo and the enemy's active sonar sound waves.

[0041] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A torpedo silencing device, characterized in that: include: A metal layer is arranged on the outer wall of the torpedo; the metal layer comprises an inner partition, a lattice layer and a spacer plate arranged in sequence from the inside to the outside, and the lattice layer forms a metal lattice structure between the inner partition and the spacer plate; A sound-absorbing layer is arranged on the outer side of the partition plate, and the sound-absorbing layer includes truncated cones arranged at intervals, and one side of the truncated cones is connected to the sound-absorbing layer; A waterproof layer is arranged on the sound-absorbing layer, and the other side of the truncated cone is connected to the waterproof layer.

2. The torpedo silencing device according to claim 1, characterized in that: The inner partition plate, the lattice layer and the spacer plate are all made of aluminum alloy.

3. The torpedo silencing device according to claim 1 or 2, characterized in that: The sound-absorbing layer and the waterproof layer are both made of rubber.

4. The torpedo silencing device according to claim 3, characterized in that: The lattice layer is a symmetrically arranged double pyramid structure.

5. The torpedo silencing device according to claim 4, characterized in that: The lattice layer includes lattice cores arranged at intervals, and the lattice core includes eight rods, one ends of the rods are connected to each other and have a common node, and the other ends of the rods are respectively connected to the inner partition plate or the partition plate.

6. The torpedo silencing device according to claim 5, characterized in that: The diameter of the top surface of the truncated cone is smaller than the diameter of the bottom surface of the truncated cone. The top surface of the truncated cone is connected to the spacer plate, and the bottom surface of the truncated cone is connected to the waterproof layer.

7. The torpedo silencing device according to claim 6, characterized in that: The projection surface of the truncated cone has two sides which are convex arcs.

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