Passive deepwater pressure compensation type bending disc transducer

Abstract

The utility model relates to a passive deepwater pressure compensation type bending disc transducer, which breaks through the limitation of operation water depth, is safe and feasible, and comprises an outer shell, a circular metal plate arranged at the upper end of the outer shell, piezoelectric ceramic wafers arranged on the front and back surfaces of the circular metal plate, and a sound reflecting baffle arranged at the lower end of an inner shell, round through holes are evenly formed in the lower end face of the outer shell, rubber pads are arranged in grooves in the lower ends of the round through holes, and meanwhile an inner cavity is formed among the inner surface of the outer shell, the sound reflecting baffle, the inner shell and the rubber pads. The bending disc transducer is provided with the piezoelectric ceramic wafer, and the internal pressure and the external pressure of the bending disc transducer can be passively kept balanced through deformation of the rubber pad, so that an internal pressure compensation structure is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater acoustic emission transducers, in particular to a passive deep-water pressure compensation type curved disc transducer. Background Art

[0002] With the development of marine equipment, there is an urgent demand for deep-water, low-frequency, small-size, broadband, and high-power transmitting transducers. However, achieving some of the above technical indicators at the same time is contradictory, and a balance must be sought among the indicators.

[0003] The curved transducer has the advantages of simple structure, small size, light weight and low operating frequency, but the unique structure of the curved disc transducer also makes it less resistant to hydrostatic pressure. If there is no internal pressure compensation, the curved transducer is usually difficult to resist the pressure of deep water. Most of them can only work in water depths of less than 200 meters, and the application range is limited. Therefore, it is necessary to design a deep-water pressure-compensated curved transmitting transducer system so that the curved transmitting transducer can break through the operating depth limit and is safe and feasible. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a passive deep-water pressure-compensated curved disc transducer, which breaks through the operating water depth limit and is safe and feasible, comprising: an outer shell, a circular metal plate arranged at the upper end of the outer shell, piezoelectric ceramic discs arranged on the front and back sides of the circular metal plate, and an anti-sound baffle arranged at the lower end of an inner shell; circular through holes are evenly arranged on the lower end surface of the outer shell, and rubber pads are arranged in the grooves at the lower ends of the circular through holes, and an inner cavity is formed between the inner surface of the outer shell and the anti-sound baffle, the inner shell, and the rubber pad.

[0005] In one embodiment of the present invention, the circular metal plate is bonded to the piezoelectric ceramic by epoxy glue, wherein the piezoelectric ceramic serves as an acoustic sensitive device of the bending disk transducer.

[0006] In one embodiment of the utility model, an oxygen gasket is provided between the circular metal plate and the outer shell, and the three are bonded and connected by epoxy glue, wherein the oxygen gasket plays a role of decoupling.

[0007] In one embodiment of the utility model, the anti-sound baffle is an epoxy-type lightweight anti-sound material, which is bonded to the upper end surface of the outer shell by epoxy glue, and the inner cavities at both ends of the anti-sound baffle are also filled with hydraulic grease to provide internal pressure.

[0008] In an embodiment of the present invention, the rubber pad is fixed in the round through hole of the outer shell by means of screws and a collar.

[0009] In one embodiment of the utility model, the circular metal plate, the piezoelectric ceramic, and the circular metal plate are provided with an insulating sealing layer at the stepped surface end after assembly, which improves the insulation sealing of the entire transducer, and the material used is polyurethane.

[0010] The above technical solution of the utility model has the following advantages over the prior art: the curved disc transducer described in the utility model is provided with a piezoelectric ceramic disc, and through the deformation of the rubber pad, the internal and external pressure balance of the curved disc transducer can be passively maintained, and the internal pressure compensation structure formed is used to resist the pressure of deep water, so that the transducer can work in water depths exceeding 200 meters, and the application range is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0012] Figure 1 It is a schematic cross-sectional structure diagram of the passive deep-water pressure compensation type curved disk transducer of the utility model;

[0013] Figure 2 It is a supplementary perspective structural schematic diagram of the curved disc transducer of the utility model.

[0014] As shown in the figure, 1. outer shell, 2. circular metal plate, 3. anti-sound baffle, 4. piezoelectric ceramics, 5. oxygen gasket, 6. rubber gasket, 7. ring, 8. insulating sealing layer, 9. inner cavity. DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 As shown, this embodiment provides a passive deep-water pressure-compensated curved disk transducer, which breaks through the operating water depth limit and is safe and feasible, including: an outer shell 1, a circular metal plate 2 arranged at the upper end of the outer shell 1, piezoelectric ceramic 4 discs arranged on the front and back sides of the circular metal plate 2, and an anti-sound baffle 3 arranged at the lower end of the inner shell; the lower end surface of the outer shell 1 is evenly provided with circular through holes, and a rubber pad 6 is provided in the groove at the lower end of the circular through hole, and an inner cavity 9 is formed between the inner surface of the outer shell 1 and the anti-sound baffle 3, the inner shell, and the rubber pad 6.

[0016] The circular metal plate 2 is bonded to the piezoelectric ceramic 4 by epoxy glue, wherein the piezoelectric ceramic 4 serves as an acoustic sensitive device of the bending disk transducer.

[0017] An oxygen gasket 5 is provided between the circular metal plate 2 and the outer shell 1, and the three are bonded together by epoxy adhesive, wherein the oxygen gasket 5 plays a role of decoupling.

[0018] The anti-sound baffle 3 is made of epoxy lightweight anti-sound material and is bonded to the upper end surface of the outer shell 1 by epoxy adhesive. The inner cavities 9 at both ends of the anti-sound baffle are also filled with hydraulic grease to provide internal pressure.

[0019] The rubber pad 6 is fixed in the round through hole of the outer shell 1 by means of screws and a collar 7 .

[0020] The circular metal plate 2, the piezoelectric ceramic 4, and the stepped surface end of the circular metal plate 2 after assembly are provided with an insulating sealing layer, which improves the insulation sealing of the entire transducer, and the material used is polyurethane.

[0021] The curved disk transducer described in this embodiment can passively maintain the balance of internal and external pressure of the curved disk transducer through the deformation of the rubber pad. The anti-sound baffle can improve the acoustic performance of the transducer.

[0022] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A passive deep-water pressure-compensated curved disc transducer, which breaks through the operating depth limit and is safe and feasible, characterized in that: include: An outer shell, a circular metal plate arranged at the upper end of the outer shell, piezoelectric ceramic discs arranged on the front and back sides of the circular metal plate, and an anti-sound baffle arranged at the lower end of the inner shell; the lower end surface of the outer shell is evenly provided with circular through holes, and a rubber pad is arranged in the groove at the lower end of the circular through hole, and an inner cavity is formed between the inner surface of the outer shell and the anti-sound baffle, the inner shell, and the rubber pad.

2. The curved disk transducer according to claim 1, characterized in that: The circular metal plate is bonded to the piezoelectric ceramic by epoxy glue, wherein the piezoelectric ceramic serves as an acoustic sensitive device of the bending disk transducer.

3. The curved disk transducer according to claim 1, characterized in that: An oxygen gasket is arranged between the circular metal plate and the outer shell, and the three are bonded and connected by epoxy adhesive, wherein the oxygen gasket plays a role of decoupling.

4. The curved disk transducer according to claim 1, characterized in that: The anti-sound baffle is made of epoxy lightweight anti-sound material and is bonded to the upper end surface of the outer shell by epoxy adhesive. Hydraulic grease is also provided in the inner cavities at both ends of the anti-sound baffle.

5. The curved disk transducer according to claim 1, characterized in that: The rubber pad is fixed in the round through hole of the outer shell through screws and a collar.

6. The curved disk transducer according to claim 1, characterized in that: The circular metal plate, piezoelectric ceramics, and the circular metal plate are provided with an insulating sealing layer at the stepped surface end after assembly, which improves the insulating sealing of the entire transducer, and the material used is polyurethane.

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