CN117550041A

CN117550041A - Acoustic transmission bearing structure of underwater vehicle and manufacturing method thereof

Info

Publication number: CN117550041A
Application number: CN202311460081.9A
Authority: CN
Inventors: 钱明宇; 许秀军; 唐亮; 梅延宁; 王博; 付清峰; 罗微
Original assignee: Harbin Topfrp Composite Co ltd
Current assignee: Harbin Topfrp Composite Co ltd
Priority date: 2023-11-03
Filing date: 2023-11-03
Publication date: 2024-02-13

Abstract

The invention relates to the technical field of forming equipment, in particular to an underwater vehicle sound-transmitting bearing structure, which comprises a body, wherein the body is provided with a first end and a second end, and a buoyancy piece is filled in the body; the longitudinal beam is arranged in the middle of the body and is used for separating the first end and the second end; the shell is arranged in the first end and the second end and is of a closed hollow structure; the rib plate is arranged on the body and is positioned between the first end and the longitudinal beam and between the second end and the longitudinal beam. The shell replaces the space occupying mould in the traditional forming method, and is integrally formed with the body, the longitudinal beam and the rib plate. The hollow position of the manufactured bearing structure has no excessive glue accumulation inside, the weight is controllable, and the sound transmission performance is good. Although the shell is more, most of the sizes are the same, so the types and the number of the formed molds are less, the management is convenient, and the cost is saved. The bearing structure shell and the internal parts are integrally formed, so that the structural strength of the bearing structure is greatly improved.

Description

Acoustic transmission bearing structure of underwater vehicle and manufacturing method thereof

Technical Field

The invention relates to the technical field of forming equipment, in particular to an underwater vehicle sound-transmitting bearing structure and a manufacturing method thereof.

Background

With the current requirements of deep sea resource exploration and military use, the detection depth of the aircraft is deeper and deeper, the cruising speed is faster and the overall performance requirement is higher and higher. With the increasing requirements on the overall performance, various detection devices are additionally arranged, and the requirements on the sound transmission performance of the bearing structure are higher. Under the condition of meeting the performance of a bearing structure, the product needs to have a local hollow structure inside to meet the requirement of equipment on sound transmission. The design requirement of the internal structure is realized through a process means.

The inside cavity casing is located the inside of bearing structure, and bearing structure size is bigger, if adopt soluble space mould and other parts and casing integrated into one piece, is difficult for dissolving soluble mould in the later stage and takes out. So according to the conventional molding method. The hollow inner shell forming method is to place a space occupying mould at the hollow position to be formed, take out the space occupying mould after forming, and take out the mould, so that the hollow position is required to be formed by gluing and sealing for 2 times. The bearing structure is divided into two parts, and after the two parts are respectively molded, the two parts are assembled into a whole in a gluing way.

The molding method has three disadvantages:

1. the hollow shell inside has more positions and larger cementing area, and when in cementing, the redundant adhesive residues of the product are easy to occur at the position of the hollow cavity inside, and the adhesive positioned inside the hollow cavity cannot be cleaned. The bearing structure has dozens of cavity positions, and if the bearing structure is formed by adopting the method, the weight of the whole bearing structure can be greatly influenced. And excessive adhesive residues can influence the sound transmission effect;

2. the bearing structure formed by the method is finally formed by two parts through gluing, and a limiting tool is required to carry out auxiliary limiting during gluing, so that the phenomenon of out-of-tolerance of the structure size after gluing is prevented. The strength of the adhesive can meet the use requirement but is weaker than the structural strength of the carbon fiber through the mechanical test piece test comparison of the adhesive and the carbon fiber composite material;

3. in the molding process of the method, tens of molds can be increased, the types and the quantity of the molds are more, the molds are not easy to manage, and the cost is correspondingly increased.

Disclosure of Invention

Therefore, the invention aims to solve the technical problems that a large amount of accumulated glue exists in the hollow part in the process of molding in the prior art, and the weight and the sound transmission performance are not easy to take out and influence, so as to provide the sound transmission bearing structure of the underwater vehicle and the manufacturing method.

In order to solve the above technical problems, the present invention provides an underwater vehicle sound-transmitting bearing structure, including: the buoyancy device comprises a body, a buoyancy member and a buoyancy sleeve, wherein the body is provided with a first end and a second end and is filled with the buoyancy member; the longitudinal beam is arranged in the middle of the body and is used for separating the first end and the second end; the shell is arranged in the first end and the second end and is of a closed hollow structure; the rib plate is arranged on the body and is positioned between the first end and the longitudinal beam and between the second end and the longitudinal beam.

Further, the housing includes: the first plate body and the second plate body, the length of the second plate body is longer than that of the first plate body; the connecting plate is arranged at one end of the first plate body and one end of the second plate body; the arc-shaped plate is arranged on the first plate body and the second plate body, and the arc-shaped plate, the first plate body, the second plate body and the connecting plate enclose a closed hollow structure.

Further, the two arc plates are oppositely arranged.

Further, the first plate body and the second plate body are arranged in parallel.

Further, the rib plate comprises a concave portion, the concave portion is arranged between the first end and the longitudinal beam, and between the second end and the longitudinal beam, and the rib plate is arranged on the concave portion.

Further, the rib plate is U-shaped.

Further, the straight lines where the bottoms of the two concave parts are located coincide with the second plate body.

Further, the body is mountain-shaped.

Further, the buoyancy member is made of an epoxy resin-based carbon fiber composite material.

The invention also provides a manufacturing method of the sound-transmitting bearing structure of the underwater vehicle, which comprises the following steps:

the manufacturing method of the shell comprises the following steps:

laying the fiber on a soluble male die according to the process design laying requirement, and then closing the mold of the soluble male die and the metal female die, and curing according to a resin curing system;

forming a shell after solidification, and cleaning burrs of the demoulded shell;

punching a second plate body at the bottom of the shell, filling a dissolving agent, dissolving the soluble male die, clearing out the soluble male die from the position of the punching hole, and then plugging the punching hole by using a structural adhesive;

the manufacturing method of the bearing structure comprises the following steps:

the body, the longitudinal beam, the buoyancy piece, the rib plate and the shell are laid and placed layer by layer on the second die according to the process design and the size requirement, the first die is used for one-step forming, a corresponding limiting device is arranged between the first die and the second die to ensure the outline dimension precision of the bearing structure, the body is heated and cured in a die state, the heating time and the heating temperature are required to meet the resin curing system, and the corresponding position is perforated after demoulding.

The technical scheme of the invention has the following advantages:

the invention provides an underwater vehicle sound transmission bearing structure, which comprises: the buoyancy device comprises a body, a buoyancy member and a buoyancy sleeve, wherein the body is provided with a first end and a second end and is filled with the buoyancy member; the longitudinal beam is arranged in the middle of the body and is used for separating the first end and the second end; the shell is arranged in the first end and the second end and is of a closed hollow structure; the rib plate is arranged on the body and is positioned between the first end and the longitudinal beam and between the second end and the longitudinal beam.

The shell replaces the space occupying mould in the traditional forming method, and is integrally formed with the body, the longitudinal beam and the rib plate. The hollow position of the manufactured bearing structure has no excessive glue accumulation inside, the weight is controllable, and the sound transmission performance is good. Although the shell is more, most of the sizes are the same, so the types and the number of the formed molds are less, the management is convenient, and the cost is saved. The bearing structure shell and the internal parts are integrally formed, so that the structural strength of the bearing structure is greatly improved. The problems that a large amount of accumulated glue exists in the hollow part in the prior art during molding, the hollow part is not easy to take out, the weight, the sound transmission performance and the like are affected are effectively solved.

The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of an underwater vehicle sound-transmitting carrying structure provided by the present invention;

FIG. 2 is a schematic view of the structure of a plurality of shells of an underwater vehicle acoustically transparent carrier structure provided by the present invention;

fig. 3 is a schematic structural view of a housing of an acoustic transparent load bearing structure of an underwater vehicle according to the present invention;

FIG. 4 is a front view of a housing of an underwater vehicle acoustically transparent carrier structure provided by the present invention;

FIG. 5 is a schematic diagram of the structure of a shell made of a soluble male die and a metal female die;

FIG. 6 is a schematic view of a structure for demolding a housing according to the present invention;

fig. 7 is a schematic diagram of a hole sealing structure of a housing according to the present invention;

fig. 8 is a schematic structural diagram of a first mold and a second mold manufacturing body provided by the present invention;

fig. 9 is a cross-sectional view of an underwater vehicle sound-transmitting carrying structure provided by the present invention.

Reference numerals illustrate:

1. a body; 2. a first end; 3. a second end; 4. a buoyancy member; 5. a longitudinal beam; 6. a housing; 7. rib plates; 8. a first plate body; 9. a second plate body; 10. a connecting plate; 11. an arc-shaped plate; 12. a recessed portion; 13. a soluble male die; 14. a metal female die; 15. a first mold; 16. a second mold; 17. and (3) a hole.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or communicable with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the disclosure. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings, it being understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present disclosure.

Referring to fig. 1 to 9, the present invention provides an underwater vehicle sound-transmitting bearing structure, comprising: a body 1, wherein the body 1 is provided with a first end 2 and a second end 3, and a buoyancy member 4 is filled in the body 1; the longitudinal beam 5 is arranged in the middle of the body 1, and the longitudinal beam 5 is used for separating the first end 2 and the second end 3; the shell 6 is arranged in the first end 2 and the second end 3, and the shell 6 is of a closed hollow structure; and the rib plate 7 is arranged on the body 1, and the rib plate 7 is positioned between the first end 2 and the longitudinal beam 5 and between the second end 3 and the longitudinal beam 5.

The shell 6 replaces a space occupying mould in the traditional forming method, and is formed integrally with the body 1, the longitudinal beam 5 and the rib plate 7. The hollow position of the manufactured bearing structure has no excessive glue accumulation inside, the weight is controllable, and the sound transmission performance is good. Although the number of the shells 6 is large, most of the shells are the same in size, so that the number and the types of the formed molds are small, the management is convenient, and the cost is saved. The bearing structure housing 6 and the internal components are integrally formed, so that the bearing structure is also greatly improved in structural strength. The problems that a large amount of accumulated glue exists in the hollow part in the prior art during molding, the hollow part is not easy to take out, the weight, the sound transmission performance and the like are affected are effectively solved.

Wherein the housing 6 provided in the first end 2 and the second end 3 are arranged opposite to each other.

In some alternative embodiments, the housing 6 comprises a first plate 8 and a second plate 9, a connecting plate 10, and an arcuate plate 11; wherein the length of the second plate body 9 is longer than that of the first plate body 8; the connecting plate 10 is arranged at one end of the first plate body 8 and one end of the second plate body 9; the arc plate 11 is arranged on the first plate body 8 and the second plate body 9, and the arc plate 11, the first plate body 8, the second plate body 9 and the connecting plate 10 are enclosed to form a closed hollow structure.

Through the setting of first plate body 8 and second plate body 9, connecting plate 10 and arc 11 to enclose the confined casing 6 of synthesis jointly, and casing 6 is hollow structure, this setting mode, can effectually guarantee the sound transmission performance of this underwater vehicle's sound transmission bearing structure.

Wherein the first plate body 8 and the second plate body 9 are arranged in parallel.

The underwater vehicle sound transmission bearing structure further comprises a concave portion 12, the concave portion 12 is arranged between the first end 2 and the longitudinal beam 5, and between the second end 3 and the longitudinal beam 5, and the rib plates 7 are arranged on the concave portion 12.

The concave part 12 is in a U shape, and the rib plate 7 is in a U shape for being matched with the concave part 12, so that the rib plate 7 is also in a U shape, the rib plate 7 plays a role in protecting the buoyancy member 4, and meanwhile, the rib plate 7 is matched with the body 1 to jointly enclose a sealing structure.

In some alternative embodiments, the straight line at which the bottoms of the two concave portions 12 are located coincides with the second plate 9. This arrangement ensures that the bottoms of the two recesses 12 are in a level condition, and thus ensures the stability of the acoustically transparent carrier structure of the underwater vehicle.

In this embodiment, the body 1 is shaped like a Chinese character 'shan'.

Wherein the buoyancy member 4 is made of an epoxy resin-based carbon fiber composite material. The epoxy resin-based carbon fiber composite material has higher strength and excellent heat resistance, and simultaneously has better thermal shock resistance.

In some alternative embodiments, the stringers 5 are made of an epoxy-based carbon fiber composite material.

The underwater vehicle sound transmission bearing structure is internally provided with a plurality of shells 6, each shell 6 is a totally enclosed shell 6, and in the forming process, a single shell 6 is used as a space occupying mould, and the underwater vehicle sound transmission bearing structure does not need to be taken out after being formed.

And (3) mold ensuring: the housing 6 is used as a space occupying die, and the dimensional accuracy is required to be ensured, so that during forming, a metal female die is processed to ensure the external dimension, and in order to ensure the dimension of the space occupying die, the space occupying die is formed by adopting the metal female die. The shell 6 processed in the method can ensure the internal and external dimensional accuracy and simultaneously ensure the weight controllability of the product.

And the sound transmission material guarantees: the sound-transmitting material means that sound waves can be incident on the material layer without reflection and loss, and the sound characteristic impedance of the material is required to be matched with water, so that the attenuation constant is small.

The acoustic impedance of the acoustically transparent material is equal to the product of the density of the acoustically transparent material and the speed of sound, and the speed of sound waves within the acoustically transparent material is proportional to the square root of the dominant modulus. The larger the modulus of the sound-transmitting material is, the smaller the density is, the sound velocity is high, the attenuation is small, and the sound-transmitting performance is better.

In terms of sound transmission performance, the epoxy resin and the polyester resin have close sound transmission performance to the matrix material, but in terms of molding process and mechanical property requirements, the epoxy resin has good wettability and long pot life. The carbon fiber has high modulus and low density, and the carbon fiber product has excellent sound transmission performance.

Referring to fig. 4 to 7, according to the internal molding structure characteristics of the sound-permeable bearing structure of the underwater vehicle, the housing 6 is divided into a plurality of parts, each part is a fully-enclosed housing 6, and the holes 17 are formed at the corresponding positions after the integral structure is molded.

The manufacturing method of the shell 6 in the sound-transmitting bearing structure of the lower aircraft comprises the following steps of molding by adopting a compression molding method of a metal female die 14 and a soluble male die 13: the metal female die 14 adopts a numerical control processing metal die to ensure the dimension of the external part, the soluble male die 13 adopts a soluble die (such as a sand die), and the specific forming mode is as follows:

laying the fiber on a soluble male die 13 according to the process design laying requirement, and then closing the mold of the soluble male die 13 and a metal female die 14, and curing according to a resin curing system;

after solidification, a shell 6 is formed, and the shell 6 after demoulding is subjected to burr cleaning;

and punching 17 on the second plate 9 at the bottom of the shell 6, filling a dissolving agent (such as water), dissolving the soluble male die, cleaning out from the position of the punching 17, and then plugging the punching 17 by using a structural adhesive.

The parts formed by the method have controllable weight, high dimensional accuracy and good sound transmission performance, and play a key role in the subsequent bearing structure forming and performance.

The shell 6 replaces a space occupying die, and is not required to be taken out after molding, so that the size and the weight are ensured when the shell 6 is molded, the internal cavity of the shell 6 is ensured by the die, and the situation of redundant glue accumulation does not exist. The method can effectively control the weight of the product and ensure the sound transmission requirement.

The outer surface of the sound-transmitting bearing structure of the underwater vehicle is provided with the die for guaranteeing when the bearing structure is finally formed, and the one-step forming guarantees the dimensional accuracy and the structural strength of the product.

Referring to fig. 8 to 9, the method for manufacturing the sound-permeable carrier structure of the underwater vehicle includes: the body 1, the longitudinal beam 5, the buoyancy member 4, the rib plates 7 and the shell 6 are laid and placed layer by layer on the second die 16 according to the process design and the size requirement,

then, the first mold 15 is used for one-step molding, wherein a corresponding limiting device (not shown in the figure) is arranged between the first mold 15 and the second mold 16 to ensure the outline dimension precision of the bearing structure, the body 1 is heated and cured in a mold state, the heating time and the heating temperature are required to meet the resin curing system, and the punching 17 is performed at the corresponding position after demolding.

If the traditional forming mode is adopted, the shell 6 is required to be divided, namely the bearing structure is divided into two parts, when each part is in a hollow forming position, a mold occupying mode is adopted, after the space occupying mold is taken out after the forming, the side shell plates are bonded and blocked, and a hollow closed cavity is formed. And assembling the two formed parts in a gluing way. The method has the defects that the glue content is not easy to control after multiple times of bonding, the glue accumulation in the cavity inside the shell 6 is not easy to clean, the performances such as weight and sound transmission are affected, and the structural strength of the multiple times of bonding is weaker than that of the integral molding structure.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. An underwater vehicle acoustically transparent load bearing structure comprising:

a body (1), the body (1) having a first end (2) and a second end (3), and the body (1) being internally filled with a buoyancy member (4);

the longitudinal beam (5) is arranged in the middle of the body (1), and the longitudinal beam (5) is used for separating the first end (2) from the second end (3);

the shell (6) is arranged in the first end (2) and the second end (3), and the shell (6) is of a closed hollow structure;

the rib plate (7) is arranged on the body (1), and the rib plate (7) is positioned between the first end (2) and the longitudinal beam (5) and between the second end (3) and the longitudinal beam (5).

2. The underwater vehicle sound-transparent carrying structure according to claim 1, characterized in that the housing (6) comprises:

a first plate body (8) and a second plate body (9), wherein the length of the second plate body (9) is longer than that of the first plate body (8);

the connecting plate (10) is arranged at one end of the first plate body (8) and one end of the second plate body (9);

the arc-shaped plate (11) is arranged on the first plate body (8) and the second plate body (9), and the arc-shaped plate (11), the first plate body (8), the second plate body (9) and the connecting plate (10) are enclosed to form a closed hollow structure.

3. An underwater vehicle acoustically transparent carrier structure as claimed in claim 2, characterised in that two of said arcuate plates (11) are oppositely disposed.

4. An underwater vehicle sound-transparent carrier structure as claimed in claim 3, characterized in that the first plate (8) and the second plate (9) are arranged in parallel.

5. The underwater vehicle sound-transparent bearing structure according to claim 3 or 4, further comprising a recess (12), the recess (12) being provided between the first end (2) and the longitudinal beam (5) and between the second end (3) and the longitudinal beam (5), the rib (7) being provided on the recess (12).

6. The underwater vehicle sound-transparent bearing structure according to claim 5, characterized in that the rib (7) is U-shaped.

7. The sound-transparent carrier structure of an underwater vehicle according to claim 5, characterized in that the line of the bottoms of two of said recesses (12) coincides with said second plate (9).

8. The underwater vehicle sound-transparent bearing structure according to claim 5, characterized in that the body (1) is mountain-shaped.

9. The underwater vehicle sound-transmitting carrying structure according to claim 5, characterized in that the buoyancy member (4) is made of an epoxy-based carbon fiber composite material.

10. A method of manufacturing an underwater vehicle acoustically transparent carrier structure as claimed in any one of claims 1 to 9 comprising:

the manufacturing method of the shell (6) comprises the following steps:

laying the fiber on a soluble male die (13) according to the process design laying requirement, and then closing the mold of the soluble male die (13) and a metal female die (14), and curing according to a resin curing system;

forming a shell (6) after solidification, and cleaning burrs of the demoulded shell (6);

punching holes (17) on a second plate body (9) at the bottom of the shell (6), filling a dissolving agent, dissolving a soluble male die (13), clearing out the soluble male die from the positions of the holes (17), and then plugging the holes (17) by using structural adhesive;

the method comprises the steps of laying and placing a body (1), a longitudinal beam (5), a buoyancy member (4), a rib plate (7) and a shell (6) on a second die (16) layer by layer according to process design and size requirements, performing one-step forming by using a first die (15), ensuring the outline size precision of a bearing structure by using a corresponding limiting device between the first die (15) and the second die (16), performing heating curing on the body (1) in a die state, wherein the heating time and the heating temperature are required to meet a resin curing system, and punching (17) at corresponding positions after demolding.