CN211606792U

CN211606792U - Unidirectional multistage parallel bending disc transducer

Info

Publication number: CN211606792U
Application number: CN202020245697.XU
Authority: CN
Inventors: 周益明
Original assignee: Suzhou Shengzhiyuan Electronic Technology Co ltd
Current assignee: Suzhou Shengzhiyuan Electronic Technology Co ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-09-29
Anticipated expiration: 2030-03-03

Abstract

The utility model relates to the technical field of transducers, and provides a unidirectional multistage parallel bending disc transducer, which comprises a radiation cover plate and a base, wherein the radiation cover plate is provided with a radiation end, and the inner side of the radiation end is provided with a telescopic column; the telescopic column is axially connected with a plurality of groups of metal bent disks in series, the piezoelectric ceramic plates are arranged on the metal bent disks, the outer edges of the adjacent metal bent disks are connected in parallel, and the base is supported at the bottom of the radiation cover plate. The metal bending disk of the transducer adopts a driving mode of a multi-stage parallel piezoelectric bending disk, and compared with the transducer in the prior art, the transducer has higher power capacity and higher compressive strength under the same frequency condition.

Description

Unidirectional multistage parallel bending disc transducer

Technical Field

The utility model relates to a transducer technical field especially relates to an one-way multistage crooked disc transducer that connects in parallel.

Background

With the breakthrough of the technology of the underwater sound system and the equipment year by year, the application scene and the importance of the underwater sound system are gradually improved. The new underwater power requirement of underwater acoustic systems emphasizes on solving the problems of long-distance communication, low-noise target identification, low-echo characteristic target detection and the like. The low frequency underwater sound system is an important direction for the development of underwater power.

As a key technology of low frequency underwater acoustic systems, there are two important development directions for low frequency transducer technology:

one is the application of low-frequency high-power broadband, the aim is to radiate low-frequency sound energy into water to the greatest extent possible, in order to improve the sound source level, the transducer array is usually large in size and scale, the transducer array is mainly applied to various large-scale active detection sonars of carrier-based and shore-based systems, the lower frequency and the higher sound power can obtain the stronger underwater remote detection capability, the LFA large-scale low-frequency sound source array loaded on the American navy 'flawless' underwater sound measurement ship weighs tens of tons, and the tile submarine beyond 130 kilometers can be actively detected.

Another important development direction is the development direction of light weight, broadband, high efficiency, low frequency. In various underwater sound and underwater sound countermeasure equipment and systems, most low-frequency sound sources are more or less limited by conditions from the aspects of platform space, loads, energy sources and the like in the installation process, such as aviation hanging sonars, active buoy sonars, torpedo alarm sonar active tow-line arrays, underwater sound transponders, underwater sound communication, underwater sound target simulators, sound baits, underwater sound interference devices and the like, the underwater sound equipment and systems are hot spots in the current underwater sound field and are more widely applied, and the demands on low-frequency, broadband, high-efficiency and high-power sound sources with small volume and light weight are urgent.

As shown in fig. 5, a structure of a transducer in the prior art is shown, where fig. a is a symmetric dual-laminated curved disk transducer, and a study is made on an air-backed dual-laminated curved disk transducer with a symmetric structure, which has the characteristics of small size, low frequency, high efficiency, and the like, and is suitable for engineering, but has a disadvantage of low pressure resistance, and cannot be applied to the deep water field; fig. b shows a pressure-resistant curved disk transducer with an overflow cavity, which introduces seawater through the overflow port to achieve internal and external pressure balance and greatly improve the pressure resistance of the transducer, however, the load of the transducer is reduced because the internal air cavity is replaced by seawater. The diameter that generally adopts the reduction disc transducer among the prior art obtains higher intensity, because the transducer diameter reduces, leads to having reduced the low frequency performance reduction of transducer, consequently, needs design the transducer of a novel structure, can obtain lower frequency and can guarantee the compressive strength of transducer again.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the not enough of frequency and intensity effect can not be compromise to low frequency transducer among the prior art, the utility model provides an one-way multistage crooked disc transducer that connects in parallel has miniaturization concurrently, lightweight, high-power, characteristic that compressive capacity is high.

The utility model provides a technical scheme that its technical problem will adopt is: a unidirectional multistage parallel bent disc transducer comprises a radiation cover plate and a base, wherein a radiation end is arranged on the radiation cover plate, and a telescopic column is arranged on the inner side of the radiation end; the telescopic column is axially connected with a plurality of layers of metal bending disks in series, the piezoelectric ceramic plates are arranged on the metal bending disks, the outer edges of the adjacent metal bending disks are axially connected, and the base is supported at the bottom of the radiation cover plate. The outer edges of the metal bent disks are connected in parallel in sequence, so that the compressive strength of the metal bent disks is increased under the condition of not changing the frequency of the transducer, and the requirements of low frequency, high power and compressive resistance can be met simultaneously. The radiation end is arranged, so that the requirement of unidirectional radiation can be met.

The connection and structure between the radiating end and the base can take many forms, three different configurations being given below.

Preferably, the outer edge of the radiation end is turned over towards the base to form a radiation end shell, and the radiation end shell is connected with the base through a telescopic piece.

Preferably, the outer edge of the base is folded towards the radiation end to form a base shell, and the base shell is connected with the radiation end through a telescopic piece.

Preferably, the outer edge of the radiation end and the outer edge of the base are turned over in opposite directions to form a radiation end shell and a base shell respectively, and the radiation end shell and the base shell are connected through a telescopic piece.

The outer edges of the radiation end and the base can be folded and extended on one side or simultaneously folded and extended on two sides, the radiation end and the base are connected through a telescopic piece, the telescopic piece and the extended part jointly enclose a shell of the transducer, and a cavity is formed on the inner side. When the piezoelectric ceramic is used, the internal piezoelectric ceramic vibrates and can generate deformation in the axial direction, so that the telescopic piece is adopted for connection to ensure axial deformation.

The metal bending disc comprises a metal bending disc body, wherein the metal bending disc body is provided with a plurality of metal bending discs, the metal bending discs are arranged on the metal bending disc body, and the metal bending disc body is provided with a plurality of metal bending discs. The simple support ring connecting piece is made of high-strength metal materials, such as: titanium alloy, stainless steel, aluminum and the like.

Furthermore, one side that the radiation end is connected with flexible post is equipped with the toper portion, and the tip of toper portion is connected with flexible post. The radiation end is set to be a conical structure, so that the rigidity and the radiation area of the energy radiation end can be increased, the radiation characteristic is improved, and the radiation is more uniform.

Furthermore, the mutual influence of the two radiation ends is avoided, the end part of the telescopic column opposite to the base is separated from the base or is movably connected with the base in the axial direction, and the axial deformation stability is ensured.

Furthermore, at least one side of the upper surface and the lower surface of the metal bending disk is provided with a piezoelectric ceramic piece, and when the two sides of the metal bending disk are provided with the piezoelectric ceramic pieces, a certain distance is reserved between the upper piezoelectric ceramic piece and the lower piezoelectric ceramic piece between the adjacent metal bending disks. The metal bending disc can be provided with piezoelectric ceramics on the surface of one side only, or can be provided with piezoelectric ceramics on both sides to increase the driving capability and be arranged according to the requirement of output energy; because the metal bending disks are in a parallel structure, when piezoelectric ceramics are arranged on two sides, the piezoelectric ceramics between the adjacent metal bending disks can be opposite, and therefore a certain distance is reserved in order to avoid mutual interference during vibration.

Further, for the convenience of connection and deformation, the extensible member adopts the bellows, the bellows includes first connecting portion, pars contractilis and the second connecting portion of body coupling, first connecting portion and second connecting portion set up the both ends at pars contractilis respectively. The expansion part can be extended and shortened along the axial direction, and the first connecting part and the second connecting part cannot be deformed in an expansion mode, so that the expansion part and the second connecting part are fixedly connected with adjacent structures conveniently.

Furthermore, in order to improve corrosion resistance, a waterproof layer is arranged on the outer sides of the radiation cover plate, the base and the corrugated pipe.

The utility model has the advantages that: the utility model provides a pair of one-way multistage crooked disc transducer that connects in parallel, the crooked disc of metal adopt the drive mode of multistage crooked disc of parallelly connected piezoelectricity, compare with the transducer among the prior art, under the same frequency condition, this transducer has less yardstick, higher power capacity and higher compressive strength. In addition, the transducer can be used as an independent small low-frequency sound source, can also form an array to realize low-frequency high-power work, can even be used as a driving unit of certain types of low-frequency flextensional transducers, and is an effective supplement of a driving mode of the traditional low-frequency transducer.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a preferred embodiment of the transducer of the present invention.

Fig. 2 is a schematic structural view of a radiation cover plate.

Fig. 3 is a schematic structural view of the base.

Fig. 4 is a schematic structural view of the bellows.

Fig. 5 shows the structure of a transducer in the prior art, wherein, fig. a is a structural diagram of a symmetrical double-laminated bending disk transducer, and fig. b is a structural diagram of a pressure-resistant bending disk transducer with a overflow cavity.

In the figure: 1. the radiation device comprises a radiation cover plate, 11, a radiation end, 11a, a conical part, 12, a telescopic column, 13, a radiation end shell, 2, a base, 21, a base shell, 3, a metal bent disc, 4, a simply supported ring connecting piece, 5, a piezoelectric ceramic piece, 6, a corrugated pipe, 61, a first connecting part, 62, a telescopic part, 63 and a second connecting part; 1a, a water-tight layer, 1b, metal, 1c, piezoelectric ceramic, 1d, an air cavity, A, a symmetry axis, 2a, flexible waterproof plastic, 2b, an aluminum plate, 2c, piezoelectric ceramic, 2d and an annular cavity structure.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1, the unidirectional multistage parallel bending disk transducer of the present invention comprises a radiation cover plate 1 and a base 2, which are oppositely arranged, and a piezoelectric ceramic plate 5; the whole cross-section of at least one of radiation apron 1 and base 2 is the U type, and inside all is equipped with the cavity that holds piezoceramics piece 5, can select for use materials such as titanium alloy, stainless steel, aluminium.

The connection and the structure between the radiation end 11 and the base 2 can adopt various forms, the outer edges of the radiation end 11 and the base 2 can be folded and extended on one side or folded and extended on two sides simultaneously, the radiation end 11 and the base are connected through a telescopic piece, the telescopic piece and the extended part jointly enclose a shell of the transducer, and a cavity is formed on the inner side.

As shown in fig. 2 and 3, in the present embodiment, the outer edge of the radiation end 11 and the outer edge of the base 2 are turned over in opposite directions to form a radiation end housing 13 and a base housing 21, respectively, and the radiation end housing 13 and the base housing 21 are connected through a telescopic member. The radiation cover plate 1 comprises a radiation end 11, a telescopic column 12 and a radiation end shell 13, wherein the telescopic column 12 is arranged on the inner side of the radiation end 11, and the telescopic column 12 is positioned in a cavity of the radiation cover plate 1. A conical part 11a is arranged on one side of the radiation end 11 connected with the telescopic column 12, and the small end of the conical part 11a is connected with the telescopic column 12; the radiation end 11 is set to be a conical structure, so that the rigidity and the radiation area of the energy radiation end 11 can be increased, the radiation characteristic is improved, and the radiation is more uniform.

The telescopic column 12 is axially connected with a plurality of groups of metal bent disks 3 in series, the piezoelectric ceramic plates 5 are arranged on the metal bent disks 3, and the outer edges of the adjacent metal bent disks 3 are mutually connected in parallel. The metal bending disc device further comprises simple support ring connecting pieces 4, and the outer edges of the adjacent metal bending discs 3 are connected in parallel through the simple support ring connecting pieces 4. The simply supported ring connecting piece 4 is made of high-strength metal materials, such as: titanium alloy, stainless steel, aluminum and the like.

The end part of the telescopic column 12 opposite to the base 2 is separated from or axially movably connected with the base 2, so that the axial deformation stability is ensured. In this embodiment, the telescopic column 12 and the base 2 are separated from each other.

The metal bending disc 3 can be provided with piezoelectric ceramics on the surface of one side only, or can be provided with piezoelectric ceramics on both sides to increase the driving capability and be arranged according to the requirement of output energy; because the metal bending disks 3 are in a parallel structure, when piezoelectric ceramics are arranged on two sides, the piezoelectric ceramics between the adjacent metal bending disks 3 are just opposite, and therefore, in order to avoid mutual interference during vibration, a certain distance is reserved between the upper piezoelectric ceramic piece 5 and the lower piezoelectric ceramic piece 5 between the adjacent metal bending disks 3.

As shown in fig. 4, the bellows 6 is adopted as the expansion member, the bellows 6 may be made of stainless steel, the bellows 6 includes a first connecting portion 61, an expansion portion 62 and a second connecting portion 63 which are integrally connected, and the first connecting portion 61 and the second connecting portion 63 are respectively disposed at two ends of the expansion portion 62. The expansion part 62 can be expanded and contracted in the axial direction without the first connection part 61 and the second connection part 63 being deformed in expansion and contraction, facilitating the fixed connection with the adjacent structure. In this embodiment, the inner sides of the ends of the first connecting portion 61 and the second connecting portion 63 are respectively provided with a step for connecting between the radiation end housing 13 and the base 2, or between the base housing 21 and the radiation end 11, or between the radiation end housing 13 and the base housing 21. The outer sides of the radiation cover plate 1, the base 2 and the corrugated pipe 6 are also provided with a waterproof layer, and the waterproof layer can be made of anticorrosive glue.

The working principle is as follows:

when an electric signal with corresponding frequency is applied to the transducer, the piezoelectric ceramic piece 5 generates radial deformation, and the piezoelectric ceramic piece 5 is fixed on the metal bending disk 3, so that the metal bending disk 3 is driven to generate radial deformation, the telescopic column 12 generates axial telescopic deformation, energy is output, and sound radiation is realized.

Because the metal bending disk 3 is connected in parallel by the simple ring connecting piece 4, the radial compressive strength is improved while the low-frequency performance is ensured.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a one-way multistage crooked disc transducer that connects in parallel which characterized in that: the radiation cover plate is provided with a radiation end, and the inner side of the radiation end is provided with a telescopic column; the telescopic column is axially connected with a plurality of layers of metal bending disks in series, each metal bending disk is provided with a piezoelectric ceramic piece, the outer edges of adjacent metal bending disks are axially connected, and the base is supported at the bottom of the radiation cover plate.

2. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: the outer edge of the radiation end is turned over towards the direction of the base to form a radiation end shell, and the radiation end shell is connected with the base through a telescopic piece.

3. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: the outer edge of the base is turned over to the radiation end to form a base shell, and the base shell is connected with the radiation end through a telescopic piece.

4. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: the outer edge of the radiation end and the outer edge of the base are turned over oppositely to form a radiation end shell and a base shell respectively, and the radiation end shell and the base shell are connected through a telescopic piece.

5. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: the metal bending disc comprises a metal bending disc and is characterized by further comprising a simply-supported ring connecting piece, and the outer edges of the adjacent metal bending discs are axially connected through the simply-supported ring connecting piece.

6. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: one side that the radiation end is connected with flexible post is equipped with the toper portion, and the tip of toper portion is connected with flexible post.

7. The unidirectional multi-stage parallel curved disk transducer of claim 1, wherein: the end part of the telescopic column opposite to the base is separated from or axially movably connected with the base.

8. The unidirectional multi-stage parallel curved disk transducer of any of claims 2-7, wherein: at least one side of the upper surface and the lower surface of the metal bending disk is provided with a piezoelectric ceramic piece, and when the piezoelectric ceramic pieces are arranged on the two sides of the metal bending disk, a certain distance is reserved between the upper piezoelectric ceramic piece and the lower piezoelectric ceramic piece between the adjacent metal bending disks.

9. The unidirectional multi-stage parallel curved disk transducer of claim 2, 3 or 4, wherein: the extensible member is the bellows, the bellows includes first connecting portion, pars contractilis and the second connecting portion of integrative connection, first connecting portion and second connecting portion set up the both ends at pars contractilis respectively.

10. The unidirectional multi-stage parallel curved disk transducer of claim 7, wherein: and a waterproof layer is arranged on the outer sides of the radiation cover plate, the base and the corrugated pipe.