Bent disc transducer with metal shell

Abstract

The bending disc transducer with the metal shell comprises an upper metal shell, an upper piezoelectric ceramic piece, a lower metal shell, a lower piezoelectric ceramic piece, a threading pipe, an anode wire and a cathode wire, the upper metal shell and the lower metal shell are welded together, and a closed cylindrical cavity is formed between the upper metal shell and the lower metal shell. The upper piezoelectric ceramic piece and the lower piezoelectric ceramic piece are installed in the cavity, the upper piezoelectric ceramic piece is adhered to the upper metal shell, the lower piezoelectric ceramic piece is adhered to the lower metal shell, the surface of the upper piezoelectric ceramic piece is connected with the surface of the lower piezoelectric ceramic piece through a positive wire, a threading hole is formed in the upper metal shell or the lower metal shell, the threading pipe is installed on the threading hole, and the upper piezoelectric ceramic piece and the lower piezoelectric ceramic piece are connected through a negative wire. The positive wire penetrates through the threading pipe and is led out of the bent disc transducer of the metal shell, one end of the negative wire is connected with the upper metal shell or the lower metal shell in the cavity, and the other end of the negative wire penetrates through the threading pipe and is led out of the bent disc transducer of the metal shell.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater acoustic transducers, in particular to a curved disc transducer with a metal shell. Background Art

[0002] A curved disk transducer is a device that converts electrical energy into mechanical vibrations and sound waves. It is typically made of piezoelectric material as the active material. It operates based on the piezoelectric effect. When an electrical signal is applied to a piezoelectric ceramic, the material deforms, driving the metal shell to produce bending vibrations. This vibration effectively excites sound waves. Currently used curved disk transducers mount piezoelectric ceramics directly on the surfaces of both sides of the metal shell. However, to prevent contact between the piezoelectric ceramics and water, acoustically transparent rubber is typically used on the outside of the metal shell to make the piezoelectric ceramics watertight. However, the thickness of the single-sided acoustically transparent rubber is generally 3mm. This structure increases the thickness of the entire transducer by approximately 6mm. For MPS arrays that require multiple such transducers to be stacked, this significantly increases the length and mass of the array, hindering deployment and maintenance in practical applications. Furthermore, the processing and installation of the acoustically transparent rubber also prolongs the transducer's production cycle. Summary of the Invention

[0003] The purpose of the present utility model is to provide a curved disk transducer with a metal shell to solve the above problems.

[0004] In order to achieve the invention purpose of this application, this application adopts the following technical solutions:

[0005] The utility model discloses a bending disk transducer with a metal shell, comprising: an upper metal shell, an upper piezoelectric ceramic sheet, a lower metal shell, the lower piezoelectric ceramic sheet, a threading tube, a positive lead, and a negative lead. The upper metal shell and the lower metal shell are welded together to form a sealed cylindrical cavity therebetween. The upper piezoelectric ceramic sheet and the lower piezoelectric ceramic sheet are mounted in the cavity. The upper piezoelectric ceramic sheet is adhered to the upper metal shell, and the lower piezoelectric ceramic sheet is adhered to the lower metal shell. The surface of the upper piezoelectric ceramic sheet is connected to the surface of the lower piezoelectric ceramic sheet via the positive lead. A threading hole is formed in the upper metal shell or the lower metal shell, and the threading tube is mounted in the threading hole. The positive lead passes through the threading tube and is led out of the bending disk transducer with the metal shell. One end of the negative lead is connected to the upper metal shell or the lower metal shell in the cavity, and the other end passes through the threading tube and is led out of the bending disk transducer with the metal shell.

[0006] The utility model relates to a curved disk transducer with a metal shell, wherein the threading hole is opened on the upper metal shell or the lower metal shell to which the upper piezoelectric ceramic sheet or the lower piezoelectric ceramic sheet is not adhered.

[0007] The utility model relates to a curved disk transducer with a metal shell, wherein the threading hole is a threaded hole, the threading tube is a threaded tube, and the threading tube is mounted on the threading hole through threads on its outer side.

[0008] The utility model discloses a curved disc transducer with a metal shell, wherein: the positive and negative wires pass through a threading tube at the same time, and a radial seal is installed in the threading tube, so that the curved disc transducer with the metal shell is isolated from air and moisture inside and outside.

[0009] The utility model provides a curved disk transducer with a metal shell, wherein the upper metal shell and the lower metal shell have the same circular shape and are made of aluminum alloy.

[0010] The utility model provides a bending disk transducer with a metal shell, wherein the upper piezoelectric ceramic sheet and the lower piezoelectric ceramic sheet are of the same cylindrical shape and are coaxial with the upper metal shell and the lower metal shell.

[0011] The curved disc transducer with a metal shell of the utility model has the following beneficial effects

[0012] The curved disk transducer with a metal shell directly sets the piezoelectric ceramic in the air cavity, which does not require an additional sound-transmitting rubber layer for watertightness. This design reduces the overall thickness and weight of the transducer, while also eliminating the steps of installing and processing the sound-transmitting rubber, simplifying the manufacturing process, and thus significantly reducing the production cycle of the transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic front cross-sectional view of the curved disk transducer with a metal shell of the present invention;

[0014] Figure 2 This is a top view schematic diagram of the curved disk transducer with a metal shell of the present invention.

[0015] exist Figure 1 and Figure 2 In the figure, number 1 is the upper metal shell; number 2 is the cavity; number 3 is the upper piezoelectric ceramic sheet; number 4 is the lower metal shell; number 5 is the lower piezoelectric ceramic sheet; number 6 is the wire tube; number 7 is the wire hole; number 8 is the positive wire; number 9 is the negative wire; number 10 is the sealing member. DETAILED DESCRIPTION

[0016] like Figure 1 and Figure 2As shown, the bending disk transducer of the metal shell of the present invention includes: an upper metal shell 1, an upper piezoelectric ceramic sheet 3, a lower metal shell 4, a lower piezoelectric ceramic sheet 5, a threading tube 6, a positive wire 8 and a negative wire 9. The upper metal shell 1 and the lower metal shell 4 are welded together to form a closed cylindrical cavity 2 between them. The upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 are installed in the above-mentioned cavity 2. The upper piezoelectric ceramic sheet 3 is adhered to the upper metal shell 1, and the lower piezoelectric ceramic sheet 5 is adhered to the lower metal shell 4. The surface of the upper piezoelectric ceramic sheet 3 is connected to the surface of the lower piezoelectric ceramic sheet 5 through the positive wire 8. A threading hole 7 is opened on the upper metal shell 1 or the lower metal shell 4. The threading hole 7 is opened on the unbonded On the upper metal shell 1 or the lower metal shell 4 having the upper piezoelectric ceramic sheet 3 or the lower piezoelectric ceramic sheet 5, the threading hole 7 is a threaded hole, and the threading tube 6 is a threaded tube. The threading tube 6 is mounted on the threading hole 7 through the threads on its outer side. The above-mentioned positive wire 8 passes through the threading tube 6 and is led out of the curved disc transducer of the metal shell. One end of the negative wire 9 is connected to the upper metal shell 1 or the lower metal shell 4 in the cavity 2, and the other end passes through the threading tube 6 and is led out of the curved disc transducer of the metal shell. The positive wire 8 and the negative wire 9 pass through the threading tube 6 at the same time. A radial seal 10 is also installed in the threading tube 6 to isolate the inside and outside of the curved disc transducer of the metal shell from air and moisture.

[0017] The upper metal shell 1 and the lower metal shell 4 are of the same circular shape and are made of aluminum alloy. The upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 are of the same cylindrical shape and are coaxial with the upper metal shell 1 and the lower metal shell 4.

[0018] When in use, the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 are respectively pasted on the top and bottom ends of the air cavity 2 formed between the upper metal shell 1 and the lower metal shell 4, and ensure that the two upper metal shells 1 and the lower metal shell 4 are tightly connected. Then, the positive and negative electrodes of the upper and lower piezoelectric ceramic sheets 3 and 5 are respectively led out using the positive wire 8 and the negative wire 9, and connected in parallel. In this way, no additional sound-transmitting rubber layer is required to make the upper and lower piezoelectric ceramic sheets 3 and 5 watertight. This design reduces the overall thickness and mass of the transducer, eliminates the steps of installing and processing the sound-transmitting rubber, and simplifies the manufacturing process. The manufacturing process can significantly reduce the production cycle of the transducer. When external sound waves act on the transducer, the upper metal shell 1, the lower metal shell 4 and the air cavity 2 will act as sound wave receivers to convert the sound waves into mechanical vibrations. Then, these vibrations will be transmitted to the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5. The mechanical vibrations caused by the sound waves will generate charges at the upper and lower ends of the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5. The upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 will induce the charges and generate electrical signals through the circuit. In this way, the transducer can convert the received sound waves into electrical signals for processing.

[0019] Among them, in order to facilitate the formation of the air cavity 2, the cross-section of the upper metal shell 1 and the lower metal shell 4 is a U-shaped structure; when the upper metal shell 1 and the lower metal shell 4 with the U-shaped structure are assembled, their opening parts naturally form a closed or semi-closed space, which provides convenience for the formation of the cavity 2.

[0020] In addition, in order to improve the performance of the upper metal shell 1 and the lower metal shell 4, the upper metal shell 1 and the lower metal shell 4 are made of aluminum alloy; the upper metal shell 1 and the lower metal shell 4 made of aluminum alloy have lower density and higher strength, making the transducer lighter as a whole. At the same time, the thermal conductivity of aluminum alloy is excellent, which helps the transducer dissipate heat during operation.

[0021] The cavity 2 is cylindrical; the diameters of the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 are smaller than the inner diameter of the cavity 2; the setting of the cylindrical cavity 2 can provide a stable supporting environment for the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5, so that the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 can be mounted. At the same time, the diameters of the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 are smaller than the inner diameter of the cavity 2, which can ensure that there is a certain gap between the upper piezoelectric ceramic sheet 3 and the lower piezoelectric ceramic sheet 5 and the metal shell 1 when they are mounted, so as to avoid stress concentration or damage caused by contact between them.

[0022] It can be understood that the upper metal shell 1 or the lower metal shell 4, the air cavity 2 and the upper piezoelectric ceramic sheet 3 or the lower piezoelectric ceramic sheet 5 are coaxially arranged; the coaxial arrangement can further enhance the structural symmetry of the transducer, reduce the refraction and reflection of sound waves during transmission, and enable the sound waves to be transmitted more directly and effectively from the piezoelectric ceramic 3 to the external medium, which helps to improve the acoustic output efficiency and sound quality of the transducer.

[0023] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A curved disk transducer with a metal housing, comprising: The invention comprises an upper metal shell (1), an upper piezoelectric ceramic sheet (3), a lower metal shell (4), a lower piezoelectric ceramic sheet (5), a wire threading tube (6), a positive lead (8) and a negative lead (9), wherein the upper metal shell (1) and the lower metal shell (4) are welded together to form a closed cylindrical cavity (2) therebetween, the upper piezoelectric ceramic sheet (3) and the lower piezoelectric ceramic sheet (5) are mounted in the cavity (2), the upper piezoelectric ceramic sheet (3) is adhered to the upper metal shell (1), the lower piezoelectric ceramic sheet (5) is adhered to the lower metal shell (4), and the upper The surface of the piezoelectric ceramic sheet (3) and the surface of the lower piezoelectric ceramic sheet (5) are connected via a positive lead (8). A threading hole (7) is provided on the upper metal shell (1) or the lower metal shell (4). A threading tube (6) is mounted on the threading hole (7). The positive lead (8) passes through the threading tube (6) and is led out of the curved disc transducer in the metal shell. One end of the negative lead (9) is connected to the upper metal shell (1) or the lower metal shell (4) in the cavity (2), and the other end passes through the threading tube (6) and is led out of the curved disc transducer in the metal shell.

2. The curved disk transducer with a metal housing as claimed in claim 1, characterized in that: The threading hole (7) is opened on the upper metal shell (1) or the lower metal shell (4) to which the upper piezoelectric ceramic sheet (3) or the lower piezoelectric ceramic sheet (5) is not adhered.

3. The metal-cased curved disk transducer according to claim 2, wherein: The threading hole (7) is a threaded hole, the threading tube (6) is a threaded tube, and the threading tube (6) is mounted on the threading hole (7) through the threads on its outer side.

4. The metal-cased curved disk transducer according to claim 3, wherein: The positive electrode wire (8) and the negative electrode wire (9) pass through the threading tube (6) at the same time. A radial sealing member (10) is also installed in the threading tube (6) to isolate the inside and outside of the curved disc transducer of the metal shell from air and moisture.

5. The metal-cased curved disk transducer according to claim 4, wherein: The upper metal shell (1) and the lower metal shell (4) have the same circular shape and are made of aluminum alloy.

6. The metal-cased curved disk transducer according to claim 5, wherein: The upper piezoelectric ceramic sheet (3) and the lower piezoelectric ceramic sheet (5) are of the same cylindrical shape and are coaxial with the upper metal shell (1) and the lower metal shell (4).

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