CN211509279U

CN211509279U - Bidirectional multistage parallel bending disk transducer

Info

Publication number: CN211509279U
Application number: CN202020245716.9U
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: 2020-09-15
Anticipated expiration: 2030-03-03

Abstract

The utility model relates to the technical field of transducers, and provides a bidirectional multistage parallel bending disc transducer, which comprises a first radiation cover plate and a second radiation cover plate which are oppositely arranged, wherein the first radiation cover plate is provided with a first radiation end, and the inner side of the first radiation end is provided with a first telescopic column; a second radiation end opposite to the radiation direction of the first radiation end is arranged on the second radiation cover plate, and a second telescopic column is arranged on the inner side of the second radiation end; the first telescopic column and the second telescopic column are both connected with a plurality of groups of metal bending disks in series along the axial direction, the piezoelectric ceramic plates are arranged on the metal bending disks, and the outer edges of the adjacent metal bending disks are connected in the axial direction. 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

Bidirectional multistage parallel bending disk transducer

Technical Field

The utility model relates to a transducer technical field especially relates to a two-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 a two-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 bidirectional multistage parallel bending disc transducer comprises a first radiation cover plate and a second radiation cover plate which are arranged oppositely, and cavities for containing piezoelectric ceramic plates are arranged in the first radiation cover plate, wherein a first radiation end is arranged on the first radiation cover plate, a first telescopic column is arranged on the inner side of the first radiation end, and the first telescopic column is positioned in the cavity of the first radiation cover plate; a second radiation end opposite to the radiation direction of the first radiation end is arranged on the second radiation cover plate, a second telescopic column is arranged on the inner side of the second radiation end, and the second telescopic column is positioned in a cavity of the second radiation cover plate; the first telescopic column and the second telescopic column are both connected with a plurality of groups of metal bending disks in series along the axial direction, the piezoelectric ceramic plates are arranged on the metal bending disks, and the outer edges of the adjacent metal bending disks are connected in the axial direction. The outer edges of the metal bent disks are sequentially and axially connected, 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. Two radiation ends with opposite radiation directions are arranged, and the requirement of bidirectional radiation can be met. The position of the node plane is a zero point position of the vibration amplitude, the first radiation end and the second radiation end are symmetrical along the node plane, and the vibration directions are opposite; the axial deformation at the node of the nodal plane is zero, and the shell can be fixed, so that the relative stability between the shell and the folded structure is ensured, and the symmetrical energy output is not influenced.

Furthermore, the outer edges of the first radiation end and the second radiation end are turned over in opposite directions to form a first radiation end shell and a second radiation end shell respectively, and the first radiation end shell and the second radiation end shell are connected through a telescopic piece. When the piezoelectric ceramic radiating device is used, the internal piezoelectric ceramic can generate deformation in the axial direction under the excitation of an electric signal, so that the first radiating end shell and the second radiating end shell are connected by the telescopic piece, and the degree of freedom of axial deformation is guaranteed. The two shells jointly enclose a cavity for accommodating the piezoelectric ceramic plate.

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 simply supported ring connecting piece is made of high-strength metal, such as: titanium alloy, stainless steel, aluminum and the like.

Furthermore, a first conical part is arranged on one side of the first radiation end connected with the first telescopic column, and the small end of the first conical part is connected with the first telescopic column; one side that second radiation end and second flexible post are connected is equipped with second toper portion, and the tip and the flexible post of second toper portion are connected. 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 opposite end parts of the first telescopic column and the second telescopic column are separated or axially movably connected, 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.

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

The utility model has the advantages that: the utility model provides a pair of two-way multistage crooked disc transducer that connects in parallel, the crooked disc of metal adopts the drive mode of multistage crooked disc of parallelly connected piezoelectricity, compares with the transducer among the prior art, and 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 the first radiation cover plate.

Fig. 3 is a schematic structural view of a second radiation cover plate.

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 first radiation cover plate, 11, a first radiation end, 11a, a first conical part, 12, a first telescopic column, 13, a first radiation end shell, 2, a second radiation cover plate, 21, a second radiation end, 21a, a second conical part, 22, a second telescopic column, 23, a second radiation end 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 bidirectional multistage parallel bending disk transducer of the present invention includes a first radiation cover plate 1 and a second radiation cover plate 2, which are oppositely disposed, and a piezoelectric ceramic plate 5; the cross section of the first radiation cover plate 1 and the second radiation cover plate 2 is U-shaped, cavities for containing the piezoelectric ceramic plates 5 are arranged inside the first radiation cover plate and the second radiation cover plate, and materials such as titanium alloy, stainless steel and aluminum can be selected. In the embodiment, the first radiation cover plate 1 and the second radiation cover plate 2 have the same structure and are symmetrically arranged along the nodal plane.

As shown in fig. 2-3, the first radiation cover plate 1 includes a first radiation end 11, a first telescopic column 12 and a first radiation end housing 13, and the second radiation cover plate 2 includes a second radiation end 21, a second telescopic column 22 and a second radiation end housing 23.

The first radiating end 11 radiates in the opposite direction to the second radiating end 21. The first telescopic column 12 is arranged on the inner side of the first radiation end 11, and the first telescopic column 12 is positioned in the cavity of the first radiation cover plate 1; the second telescopic column 22 is arranged at the inner side of the second radiation end 21, and the second telescopic column 22 is positioned in the cavity of the second radiation cover plate 2; the first telescopic column 12 and the second telescopic column 22 are both connected with a plurality of groups of metal bending disks 3 in series along the axial direction, the piezoelectric ceramic plates 5 are arranged on the metal bending disks 3, and the outer edges of the adjacent metal bending disks 3 are connected in the axial direction through simple support rings. The metal bending disc structure further comprises simple support ring connecting pieces 4, and the outer edges of the adjacent metal bending discs 3 are axially connected through simple support rings 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 outer edges of the first radiation end 11 and the second radiation end 21 are turned over oppositely to form a first radiation end shell 13 and a second radiation end shell 23 respectively, and the first radiation end shell 13 and the second radiation end shell 23 are connected through a telescopic piece. Because the internal piezoelectric ceramic vibrates during use and can generate deformation in the axial direction, a telescopic piece is adopted to connect the first radiation end shell 13 and the second radiation end shell 23 so as to ensure axial deformation. The two shells jointly enclose a cavity for accommodating the piezoelectric ceramic plate 5.

A first conical part 11a is arranged on one side of the first radiation end 11 connected with the first telescopic column 12, and the small end of the first conical part 11a is connected with the first telescopic column 12; one side of the second radiation end 21 connected with the second telescopic column 22 is provided with a second conical part 21a, and the small end of the second conical part 21a is connected with the second telescopic column 22. 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.

The mutual influence of the two radiation ends is avoided, and the opposite end parts of the first telescopic column 12 and the second telescopic column 22 are separated or axially movably connected, so that the axial deformation stability is ensured. In this embodiment, the two telescopic columns are separated from each other, and the separated positions are located on the nodal planes.

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. The inner sides of the ends of the first connecting portion 61 and the second connecting portion 63 are provided with steps for connecting with the first radiation end housing 13 and the second radiation end housing 23, respectively. The outer sides of the first radiation cover plate 1, the second radiation cover plate 2 and the corrugated pipe 6 are further provided with a waterproof layer, and the waterproof layer can be made of anti-corrosion 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 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. A bidirectional multistage parallel bending disk transducer is characterized in that: the radiation device comprises a first radiation cover plate and a second radiation cover plate which are oppositely arranged, wherein a first radiation end is arranged on the first radiation cover plate, and a first telescopic column is arranged on the inner side of the first radiation end; a second radiation end opposite to the radiation direction of the first radiation end is arranged on the second radiation cover plate, and a second telescopic column is arranged on the inner side of the second radiation end; the first telescopic column and the second telescopic column are both connected with a plurality of groups of metal bending disks in series along the axial direction, the metal bending disks are provided with piezoelectric ceramic plates, and the outer edges of the adjacent metal bending disks are connected in the axial direction.

2. The bidirectional multi-stage parallel flexure disk transducer of claim 1, wherein: the outer edges of the first radiation end and the second radiation end are turned over in opposite directions to form a first radiation end shell and a second radiation end shell respectively, and the first radiation end shell and the second radiation end shell are connected through a telescopic piece.

3. The bidirectional multi-stage parallel flexure 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.

4. The bidirectional multi-stage parallel flexure disk transducer of claim 1, wherein: a first conical part is arranged on one side of the first radiation end connected with the first telescopic column, and the small end of the first conical part is connected with the first telescopic column; one side that second radiation end and second flexible post are connected is equipped with second toper portion, and the tip and the flexible post of second toper portion are connected.

5. The bidirectional multi-stage parallel flexure disk transducer of claim 1, wherein: the opposite end parts of the first telescopic column and the second telescopic column are separated or axially movably connected.

6. The bidirectional multi-stage parallel flexure disk transducer of any one of claims 2-5, 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.

7. The bidirectional multi-stage parallel flexure disk transducer of claim 2, 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.

8. The bidirectional multi-stage parallel flexure disk transducer of claim 7, wherein: and a waterproof layer is arranged on the outer sides of the first radiation cover plate, the second radiation cover plate and the corrugated pipe.