CN117772583A - Transducer with acoustic compliance disk mounted therein - Google Patents
Transducer with acoustic compliance disk mounted therein Download PDFInfo
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- CN117772583A CN117772583A CN202311787909.1A CN202311787909A CN117772583A CN 117772583 A CN117772583 A CN 117772583A CN 202311787909 A CN202311787909 A CN 202311787909A CN 117772583 A CN117772583 A CN 117772583A
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- metal
- transducer
- metal ring
- sound
- disc
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- 239000000463 material Substances 0.000 claims description 13
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
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- 239000004593 Epoxy Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The invention provides a transducer internally provided with a sound compliant disk, comprising: piezoelectric ceramics, a metal substrate, a metal ring, a sound compliant disc and a watertight coating; the sound cis disc is arranged on the inner wall of the metal ring, and the metal substrate is connected and arranged on the opening end face of the metal ring; the metal substrate and the metal ring form a cavity structure, and the sound compliant disc is positioned in the cavity structure; the piezoelectric ceramics are connected and arranged on the two metal substrates, and the watertight coating layer is coated on the surfaces of the piezoelectric ceramics. The invention improves the pressure resistance of the disc transducer and ensures reliable sound radiation performance.
Description
Technical Field
The invention relates to the technical field of underwater sound engineering, in particular to a transducer internally provided with a sound compliant disc, and especially relates to a disc transducer internally provided with the sound compliant disc.
Background
The underwater sound engineering technology plays a role in the process of exploring the ocean by human beings, and the transducer serving as an energy conversion component is a key component for realizing underwater detection by underwater sound engineering equipment. According to the acoustic wave propagation characteristics in water, the further the detection distance is, the lower the required acoustic wave frequency is, so that a low-frequency transducer is a hot spot of current research. Disk transducers are one of many low frequency transducer types that operate primarily in flexural vibration modes, with the advantage of low frequency, small size. After the MPS is formed by a plurality of disc transducers, the working frequency can be further reduced and the working bandwidth can be improved under the limited size, and the disc transducers are more popular in the practical application process.
However, due to the cavity structure inside the disc transducer, the pressure resistance is limited by structural strength, and most of the disc transducers can only work from tens of meters to hundreds of meters, so that the application range of the disc transducer is greatly limited. In order to obtain a greater working depth, the pressure resistance is generally improved by increasing the structural strength, but the resonant frequency is increased. Alternatively, the disc transducer internal cavity is in fluid communication with the outside, creating a relief structure that balances the internal and external pressures, but this results in a significant reduction in radiation efficiency. Therefore, a pressure-resistant structure needs to be designed, and the pressure-resistant performance of the disc transducer is improved on the premise of ensuring the acoustic performance.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present invention to provide a transducer with an internally mounted acoustic compliance plate.
According to the invention there is provided a transducer for internally mounting a sound compliant disc comprising: piezoelectric ceramics, a metal substrate, a metal ring, a sound compliant disc and a watertight coating;
the sound cis disc is arranged on the inner wall of the metal ring, and the metal substrate is connected and arranged on the opening end face of the metal ring; the metal substrate and the metal ring form a cavity structure, and the sound compliant disc is positioned in the cavity structure;
the piezoelectric ceramics are connected and arranged on the two metal substrates, and the watertight coating layer is coated on the surfaces of the piezoelectric ceramics.
Preferably, the metal ring is provided with an overflow hole and a fixed bracket;
the overflow holes are arranged on the side surface of the metal ring, and the fixing support is arranged on the inner side wall of the metal ring;
the sound compliance plate is arranged on the inner wall of the metal circular ring through the fixing support.
Preferably, two metal substrates are arranged, and the two metal substrates are respectively connected and arranged on two opening end faces of the metal ring;
the piezoelectric ceramics are arranged in two, and the two piezoelectric ceramics are respectively connected and arranged on the two metal substrates.
Preferably, the diameter of the piezoelectric ceramic is equal to or smaller than the diameter of the metal substrate.
Preferably, the diameter of the metal substrate is equal to the outer diameter of the metal ring.
Preferably, the number of the overflow holes is several, and the overflow holes are uniformly distributed on the side surface of the metal ring;
the fixed brackets are a plurality of, and the fixed brackets are uniformly distributed on the inner side wall of the metal ring.
Preferably, the number of the overflow holes is 3 to 6, and the number of the fixing brackets is 3 to 6.
Preferably, the fixed support comprises a support body and vibration isolation rubber which are connected, wherein the vibration isolation rubber is connected with the inner side wall of the metal circular ring, and the support body is connected with the sound cis disc.
Preferably, the material of the metal substrate is aluminum or steel or titanium alloy;
and/or the material of the metal ring is aluminum or steel or titanium alloy;
and/or the watertight coating is made of rubber or polyurethane or epoxy resin;
and/or the material of the sound cis disc is aluminum or steel or titanium alloy.
Preferably, the thickness of the sound compliant disc is smaller than the height of a cavity structure formed by the metal substrate and the metal ring;
and/or the compression coefficient of the sound compliant disc is larger than that of the external fluid.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the prior art, the acoustic compliance plate is arranged in the overflow cavity, so that the acoustic impedance of the inner cavity is far lower than that of external fluid, and the pressure resistance of the disc transducer is improved, and meanwhile, the reliable acoustic radiation performance is ensured.
2. The pressure resistance of the disk transducer internally provided with the sound cis-disc depends on the working depth of the sound cis-disc, and is irrelevant to the structural strength of the transducer, so that the transducer with lower resonance frequency can be designed under the same size, and the coverage of multiple working depths of the same transducer can be realized by selecting a proper sound cis-disc.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a disk transducer;
FIG. 2 is a schematic cross-sectional view of a disk transducer;
FIG. 3 is a schematic view of a metal ring;
FIG. 4 is a schematic structural view of a fixing bracket;
FIG. 5 is a schematic structural view of a sound compliant disc;
fig. 6 is a schematic diagram of a transmit voltage response curve of a disk transducer.
The figure shows:
overflow hole 6 of piezoelectric ceramic 1
Metal substrate 2 fixing support 7
Metal ring 3 support body 8
Vibration isolation rubber 9 of sound compliant disk 4
Watertight cladding 5
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1:
as shown in fig. 1 to 6, the present embodiment provides a transducer with an internally mounted acoustic compliance plate, including: piezoelectric ceramics 1, a metal substrate 2, a metal circular ring 3, a sound compliant disc 4 and a watertight coating 5; the sound compliant disc 4 is arranged on the inner wall of the metal circular ring 3, and the metal substrate 2 is connected and arranged on the opening end face of the metal circular ring 3; the metal base plate 2 and the metal ring 3 form a cavity structure, and the sound compliant disc 4 is positioned in the cavity structure; the piezoelectric ceramics 1 are connected and arranged on the two metal substrates 2, and the watertight coating layer 5 is coated on the surface of the piezoelectric ceramics 1. The material of the metal substrate 2 is aluminum or steel or titanium alloy; the material of the metal ring 3 is aluminum or steel or titanium alloy; the watertight coating 5 is made of rubber or polyurethane or epoxy. The material of the acoustic compliance plate 4 is aluminum or steel or titanium alloy.
The diameter of the piezoelectric ceramic 1 is equal to or smaller than the diameter of the metal substrate 2. The diameter of the metal base plate 2 is equal to the outer diameter of the metal ring 3. The number of the metal substrates 2 is two, and the two metal substrates 2 are respectively connected and arranged on the two opening end surfaces of the metal ring 3; the piezoelectric ceramics 1 are arranged in two, and the two piezoelectric ceramics 1 are respectively connected and arranged on the two metal substrates 2.
The metal ring 3 is provided with an overflow hole 6 and a fixed bracket 7; the overflow holes 6 are arranged on the side surface of the metal circular ring 3, and the fixing support 7 is arranged on the inner side wall of the metal circular ring 3; the sound compliance plate 4 is arranged on the inner wall of the metal circular ring 3 through a fixed bracket 7. The number of the overflow holes 6 is several, and the overflow holes 6 are uniformly distributed on the side surface of the metal circular ring 3; the fixed support 7 is a plurality of, and a plurality of fixed support 7 evenly distributed is on the inside wall of metal ring 3. The number of overflow holes 6 is 3 to 6, and the number of fixing brackets 7 is 3 to 6. The fixed support 7 comprises a support main body 8 and a vibration isolation rubber 9 which are connected, the vibration isolation rubber 9 is connected with the inner side wall of the metal circular ring 3, and the support main body 8 is connected with the acoustic compliance plate 4.
The thickness of the sound compliant disc 4 is smaller than the height of a cavity structure formed by the metal substrate 2 and the metal ring 3; the compression coefficient of the acoustic compliance plate 4 is greater than the compression coefficient of the external fluid.
Example 2:
the present embodiment will be understood by those skilled in the art as a more specific description of embodiment 1.
Aiming at the defects existing in the prior art, the aim of the embodiment is to provide a disc transducer internally provided with a sound compliant disc. In order to achieve the above object, the present embodiment provides the following technical solutions:
the utility model provides an internally mounted sound compliance dish's disc transducer, includes piezoceramics 1, metal base plate 2, metal ring 3, sound compliance dish 4, watertight coating 5, metal ring 3 includes overflow aperture 6, fixed bolster 7, sound compliance dish 4 passes through fixed bolster 7 to be installed in metal ring 3 inner wall, metal base plate 2 one side is two with piezoceramics 1 quantity, metal base plate 2 one side bonds with piezoceramics 1, and the another side combines to be a whole with metal ring 3 terminal surface through laser welding or bonding's mode.
In the above scheme, the number of the piezoelectric ceramics 1 is 2, and the diameter is smaller than or equal to the diameter of the metal substrate 2.
In the above scheme, the number of the metal substrates 2 is 2, and the diameter is consistent with the outer diameter of the metal ring 3.
In the above scheme, the watertight coating layer 5 is uniformly coated on the surface of the piezoelectric ceramic 1.
In the above scheme, the number of the overflow holes 6 is 3 to 6, and the overflow holes are uniformly distributed on the side surface of the metal ring 3.
In the above scheme, the mounting and fixing bracket 7 comprises a bracket main body 8 and vibration isolation rubber 9, and the bracket main body 8 and the vibration isolation rubber 9 are combined into a whole through a glue bonding mode.
In the above scheme, the number of the fixing brackets 7 is 3 to 6, and the fixing brackets are uniformly distributed and arranged on the inner wall of the metal ring 3.
In the above scheme, the fixing support 7 is connected with the metal ring 3 through bonding or screw fixing.
In the above-described embodiments, the material of the metal substrate 2 is a metal such as aluminum, steel, or titanium alloy.
In the above scheme, the material of the metal ring 3 is metal such as aluminum, steel, titanium alloy, etc.
In the above scheme, the material of the watertight coating layer 5 is rubber, polyurethane or epoxy.
In the above scheme, the thickness of the sound compliant disc 4 is smaller than the height of the inner cavity formed by the metal substrate 2 and the metal ring 3.
In the above-mentioned scheme, the acoustic compliance plate 4 is a custom product, and its compression coefficient should be far greater than the external fluid compression coefficient.
In the above scheme, the materials of the sound compliant disc 4 are metals such as aluminum, steel, titanium alloy and the like.
Example 3:
the present embodiment will be understood by those skilled in the art as a more specific description of embodiment 1.
As shown in fig. 1 to 6, the present embodiment provides a technical solution: the utility model provides an internally mounted sound compliance disk's disc transducer, includes piezoceramics 1, metal base plate 2, metal ring 3, sound compliance disk 4, watertight coating 5, metal ring 3 includes overflow aperture 6, fixed bolster 7, sound compliance disk 4 passes through fixed bolster 7 to be installed in metal ring 3 inner wall, metal base plate 2 one side is two with piezoceramics 1 quantity, metal base plate 2 one side bonds with piezoceramics 1, and the another side bonds another metal base plate 2 and piezoceramics 1 as a whole with metal ring 3 terminal surface through laser welding or glue bonding's mode, adopts the same mode to bond as a whole with metal ring 3 terminal surface.
The principle of the disk transducer with the acoustic compliance disk installed inside is that overflow holes 6 are designed on the side face of a metal circular ring 3, so that the inner cavity of the transducer is communicated with external fluid, pressure balance is realized, and the pressure resistance of the transducer is improved. In order to improve the acoustic radiation efficiency of the disc transducer in an overflow mode, the acoustic compliance plate 4 is arranged on the inner wall of the metal circular ring 3, the acoustic compliance plate 4 is a customized product, the compression coefficient of the acoustic compliance plate is far greater than that of external fluid, and the acoustic impedance of the inner cavity of the disc transducer is far lower than that of the external fluid, so that the acoustic radiation efficiency is improved. The pressure resistance of the technical scheme depends on the pressure resistance of the acoustic compliance board 4, so that the multi-working depth coverage of the transducer can be realized by selecting the acoustic compliance board 4 with proper performance.
As shown in fig. 3, the metal ring 3 comprises an overflow hole 6 and a fixing bracket 7.
As shown in fig. 3, the number of the overflow holes 5 is 3 to 6, and the overflow holes are uniformly distributed on the side surface of the metal ring 3, and the number of the overflow holes is 4.
As shown in fig. 3, the number of the fixing brackets 7 is 3 to 6, and the number of the fixing brackets is 4, and the fixing brackets are uniformly arranged on the inner wall of the metal ring 3 in a screw or glue bonding mode.
As shown in fig. 4, the fixing bracket 7 includes a bracket main body 8 and a vibration isolation rubber 9, and the bracket main body 8 and the vibration isolation rubber 9 are bonded into a whole by glue.
As shown in fig. 1, the compliant disc 4 is mounted on the inner wall of the metal ring 3 through fixing brackets 7, the diameter of an inner cutting surface formed by a plurality of fixing brackets 7 is slightly larger than that of the compliant disc 4, and the inner cutting surface is supported by abutting against the outer edge of the compliant disc 4 through the fixing brackets 7.
As shown in fig. 2, the number of the metal substrates 2 is 2, and the metal substrates are combined with the upper end surface and the lower end surface of the metal ring 3 into a whole by adopting a glue bonding or laser welding mode.
As shown in fig. 2, the number of the piezoelectric ceramics 1 is 2, and the piezoelectric ceramics are combined with the outer surface of the metal ring 3 into a whole by adopting a glue bonding mode.
As shown in fig. 2, the watertight coating layer 5 is made of polyurethane, and is uniformly coated on the surface of the piezoelectric ceramic 1 in a potting manner.
As shown in FIG. 5, the said sound track disc 4 is a customized product, its compression coefficient should be far greater than the external fluid compression coefficient, the invention selects the compression coefficient of sound track disc to be 1.09×10 -8 Pa -1 The pressure resistance is greater than 3MPa, so the pressure resistance of the disk transducer is greater than 3MPa.
As shown in fig. 6, the transmission voltage response curve measured by the disk transducer is 270mm in diameter and 50mm in height, the resonance frequency is 250Hz, and the resonance point transmission voltage response is 118dB.
The invention improves the pressure resistance of the disc transducer and ensures reliable sound radiation performance.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. A transducer for internally mounting a sound compliant disc, comprising: the piezoelectric ceramic (1), a metal substrate (2), a metal ring (3), a sound compliant disc (4) and a watertight coating layer (5);
the sound compliant disc (4) is arranged on the inner wall of the metal ring (3), and the metal substrate (2) is connected and arranged on the opening end face of the metal ring (3); the metal base plate (2) and the metal ring (3) form a cavity structure, and the sound compliant disc (4) is positioned in the cavity structure;
the piezoelectric ceramics (1) are connected and arranged on the two metal substrates (2), and the watertight coating layer (5) is coated on the surface of the piezoelectric ceramics (1).
2. Transducer with internally mounted acoustic compliance plate according to claim 1, characterized in that the metal ring (3) is provided with overflow holes (6) and fixing brackets (7);
the overflow holes (6) are arranged on the side surface of the metal circular ring (3), and the fixing support (7) is arranged on the inner side wall of the metal circular ring (3);
the sound compliance plate (4) is arranged on the inner wall of the metal circular ring (3) through the fixing support (7).
3. Transducer of an internally mounted acoustic compliance plate according to claim 1, characterized in that the number of the metal substrates (2) is two, the two metal substrates (2) being respectively connected and arranged on the two open end faces of the metal ring (3);
the piezoelectric ceramics (1) are arranged in two, and the two piezoelectric ceramics (1) are respectively connected and arranged on the two metal substrates (2).
4. Transducer of an internally mounted acoustic compliance plate according to claim 1, characterized in that the diameter of the piezoelectric ceramic (1) is smaller than or equal to the diameter of the metal substrate (2).
5. Transducer of an internally mounted acoustic compliance plate according to claim 1, characterized in that the diameter of the metal base plate (2) is equal to the outer diameter of the metal ring (3).
6. The transducer of the internally mounted acoustic compliance plate according to claim 2, characterized in that the number of overflow holes (6) is several, the number of overflow holes (6) being evenly distributed on the side of the metal ring (3);
the fixed brackets (7) are a plurality of, and the fixed brackets (7) are uniformly distributed on the inner side wall of the metal ring (3).
7. The internally mounted sonotrode transducer of claim 6, characterized in that the overflow holes (6) are provided in 3 to 6 and the fixing brackets (7) are provided in 3 to 6.
8. The transducer of an internally mounted acoustic compliance board according to claim 2, characterized in that the fixed support (7) comprises a support body (8) and a vibration isolation rubber (9) which are connected, the vibration isolation rubber (9) is connected with the inner side wall of the metal ring (3), and the support body (8) is connected with the acoustic compliance board (4).
9. Transducer of an internally mounted acoustic compliance plate according to claim 1, characterized in that the material of the metal substrate (2) is aluminium or steel or a titanium alloy;
and/or the material of the metal ring (3) is aluminum or steel or titanium alloy;
and/or the watertight coating layer (5) is made of rubber or polyurethane or epoxy;
and/or the material of the sound cis disc (4) is aluminum or steel or titanium alloy.
10. Transducer of an internally mounted acoustic compliance plate according to claim 1, characterized in that the thickness of the acoustic compliance plate (4) is due to being smaller than the height of the cavity structure constituted by the metal base plate (2) and the metal ring (3);
and/or the compression coefficient of the sound compliant disc (4) is larger than the compression coefficient of the external fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311787909.1A CN117772583A (en) | 2023-12-22 | 2023-12-22 | Transducer with acoustic compliance disk mounted therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311787909.1A CN117772583A (en) | 2023-12-22 | 2023-12-22 | Transducer with acoustic compliance disk mounted therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117772583A true CN117772583A (en) | 2024-03-29 |
Family
ID=90401107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311787909.1A Pending CN117772583A (en) | 2023-12-22 | 2023-12-22 | Transducer with acoustic compliance disk mounted therein |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117772583A (en) |
-
2023
- 2023-12-22 CN CN202311787909.1A patent/CN117772583A/en active Pending
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