CN213051361U

CN213051361U - Ultrasonic transducer

Info

Publication number: CN213051361U
Application number: CN202021021418.8U
Authority: CN
Inventors: 徐海强
Original assignee: Jsti Group Guangdong Testing And Certification Co ltd
Current assignee: Jsti Group Guangdong Testing And Certification Co ltd
Priority date: 2020-06-06
Filing date: 2020-06-06
Publication date: 2021-04-27
Anticipated expiration: 2030-06-06

Abstract

The utility model discloses an ultrasonic transducer relates to ultrasonic wave technical field. The utility model discloses an outer shell, fixed surface is connected with the lid on the shell, it is a plurality of to run through between shell and the lid and be provided with set screw, set screw lower part fixedly connected with back shroud, fixedly connected with elasticity preforming between back shroud and the set screw, part fixedly connected with prestressing force bolt runs through at back shroud upper surface center, prestressing force bolt side fixedly connected with insulating cover, fixed surface is connected with piezoceramics pole piece a plurality of under the back shroud, fixedly connected with copper sheet pole piece between the piezoceramics pole piece, piezoceramics pole piece and copper sheet pole piece all cup joint in the insulating cover outside, prestressing force bolt lower part threaded connection has the front shroud, front shroud upper portion outside fixedly connected with sealing washer. The utility model discloses a design of prestressing force bolt, sealing washer and wiring downthehole inscription electric wire makes the device sealed completely, has realized that the device can adapt to multiple service environment's function.

Description

Ultrasonic transducer

Technical Field

The utility model belongs to the technical field of the ultrasonic wave, particularly, in particular to ultrasonic transducer.

Background

The ultrasonic transducer is an energy converter which converts input electric power into mechanical power (namely ultrasonic wave) and then transmits the mechanical power, consumes little energy per se, and is applied to many fields of scientific research, production, industry and the like, for example, ultrasonic wave cleaning machines, extraction devices for laboratories, ultrasonic welding and the like need to be used.

Application number CN201110042214.1 discloses an ultrasonic transducer probe with high frequency operation frequency. The ultrasonic transducer probe comprises a substrate and an ultrasonic transducer array, wherein the substrate is provided with a plurality of openings, and the ultrasonic transducer array is arranged on the substrate. The ultrasonic transducer array has a plurality of resonant cells, and the thickness of each resonant cell is 1/2 wavelengths which are equivalent to the operating frequency of the ultrasonic transducer. Each resonant unit comprises an oscillating element and a piezoelectric element, wherein the oscillating element is provided with a first surface adjacent to the substrate, and the piezoelectric element is arranged on the first surface and correspondingly positioned in the openings. Ultrasonic transducers are used in a variety of applications, often requiring a sealed design to accommodate a variety of environments, and the device is not adaptable to submersed operation, such as in a liquid.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides an ultrasonic transducer to overcome the above-mentioned technical problem that current correlation technique exists.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to an ultrasonic transducer, which comprises an outer shell, fixed surface is connected with the lid on the shell, the shell with it is a plurality of to run through between the lid to be provided with set screw, set screw lower part fixedly connected with back shroud, the back shroud with fixedly connected with elasticity preforming between the set screw, back shroud upper surface center runs through part fixedly connected with prestressing force bolt, prestressing force bolt side fixedly connected with insulating cover, back shroud lower surface is fixedly connected with piezoceramics pole piece a plurality of, fixedly connected with copper sheet pole piece between the piezoceramics pole piece, the piezoceramics pole piece with the copper sheet pole piece all cup joint in the insulating cover outside, prestressing force bolt lower part threaded connection has the front shroud, the fixedly connected with sealing washer in the front shroud upper portion outside.

Furthermore, the upper part of the fixing screw is clamped inside the cover body, and the lower part of the fixing screw penetrates through the upper surface of the shell.

Furthermore, the side face of the rear cover plate is a distance away from the inner side face of the shell, a wiring hole penetrates through the upper surface of the shell and the cover body, and the lower end of the wiring hole is located between the inner side of the cover body and the side face of the rear cover plate.

Furthermore, a small distance is reserved between the upper surface of the rear cover plate and the upper surface of the interior of the shell, and the distance is slightly larger than the deformation distance of the elastic pressing sheet under the maximum pressure.

Further, the insulation sleeve sleeving position is from the upper screw of the prestressed bolt to the upper surface of the front cover plate.

Furthermore, the upper portion of the front cover plate is cylindrical, the lower portion of the front cover plate is in a table shape, the table shape of the lower portion of the front cover plate is externally exposed on the shell, the side face of the upper portion of the front cover plate is attached to the inside of the shell, the sealing ring is located in the attaching position, and a connecting hole is formed in the center of the lower surface of the front cover plate.

The utility model discloses following beneficial effect has:

the high-frequency current polarization piezoelectric ceramic pole piece which enters the interior of the transducer through a wiring hole between the cover body and the shell and is connected with the copper sheet pole piece, because the quantity of the piezoelectric ceramic pole pieces connected to the two sides of the copper sheet pole piece is the same and the polarization directions of the adjacent two piezoelectric ceramic pole pieces are opposite, the longitudinal vibration directions of the piezoelectric ceramic pole pieces with piezoelectric effect after polarization are the same, in the polarization process, the insulating sleeve isolates and protects the prestressed bolt from the piezoelectric part, the prestressed bolt integrally connects the piezoelectric part and the front and rear cover plates in the whole device together, the generated resonance is converted into ultrasonic waves without loss while the sealing performance of the device is ensured, through the matching of the piezoelectric ceramic pole pieces, the front cover plate, the rear cover plate and the like, the performance of the transducer is greatly improved compared with that of the transducer made of the traditional single ceramic material, and the performance of the device is improved; meanwhile, the elastic pressing sheet also prevents the device from being damaged by local heating caused by integral impact of high-frequency vibration on the device, the sealing ring arranged in the front cover plate further improves the integral sealing property of the device, the device is completely sealed through the design of the prestressed bolt, the sealing ring and the connecting wire connected in the wiring hole, and the function that the device can adapt to various use environments is realized; therefore, high-frequency electric energy is converted into mechanical vibration with the same frequency through the piezoelectric ceramic pole piece by the device, ultrasonic waves are generated to realize energy conversion, the transducer can be further amplified through the matching of the platform-shaped design of the front cover plate and the connecting holes, and the energy conversion intensity of the device is improved.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

Fig. 1 is an overall schematic view of the present invention;

fig. 2 is a front sectional view of the present invention;

fig. 3 is a side sectional view of the present invention;

fig. 4 is an exploded view of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a housing; 2. a cover body; 3. a set screw; 4. a rear cover plate; 5. elastic tabletting; 6. a prestressed bolt; 7. an insulating sleeve; 8. piezoelectric ceramic pole pieces; 9. a copper sheet pole piece; 10. a front cover plate; 11. a seal ring; 12. a wiring hole; 13. and connecting the holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "top", "middle", "inner", and the like indicate positional or orientational relationships and are merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1-4, the present invention relates to an ultrasonic transducer, which comprises a housing 1, a cover 2 fixedly connected to the upper surface of the housing 1, a plurality of fixing screws 3 passing through the housing 1 and the cover 2, a rear cover plate 4 fixedly connected to the lower portion of the fixing screws 3, an elastic pressing plate 5 fixedly connected between the rear cover plate 4 and the fixing screws 3, a pre-stressed bolt 6 fixedly connected to the center of the upper surface of the rear cover plate 4, an insulating sleeve 7 fixedly connected to the side surface of the pre-stressed bolt 6, a plurality of piezoelectric ceramic pole pieces 8 fixedly connected to the lower surface of the rear cover plate 4, a copper sheet 9 fixedly connected between the piezoelectric ceramic pole pieces 8, the piezoelectric ceramic pole pieces 8 and the copper sheet 9 both sleeved outside the insulating sleeve 7, a front cover plate 10 connected to the lower portion of the pre-stressed bolt 6 by a screw thread, and a sealing ring 11 is fixedly connected to the outer side of the upper part of the front cover plate 10.

In one embodiment, for the fixing screw 3, the upper portion of the fixing screw 3 is engaged with the inside of the cover 2, and the lower portion of the fixing screw 3 penetrates through the upper surface of the housing 1, so that the fixing screw 3 can reinforce the cover 2 and the housing 1, thereby improving the sealing performance and strength of the whole structure. In addition, when the cover body 2 is used specifically, the cover body 2 is connected with the shell 1 in a metal melting pouring mode, and the materials used for the shell 1 of the cover body 2 are all anticorrosive materials.

In an embodiment, for the rear cover plate 4, a distance is provided between the side surface of the rear cover plate 4 and the inner side surface of the housing 1, a wiring hole 12 is penetratingly provided between the upper surface of the housing 1 and the cover body 2, and the lower end of the wiring hole 12 is located between the inner side of the cover body 2 and the side surface of the rear cover plate 4, so that the inside of the wiring hole 12 can be used for connecting a high-frequency current required by the transducer, and an accessed electric wire is connected with the copper sheet pole piece 9 in an internal connection manner, thereby avoiding the exposure of the electric wire and providing convenience for the transducer to work in liquid. In a specific application, the cover 2 is connected to the electric wire in a sealed state, and the high-frequency current is usually about 15 kHz.

In one embodiment, for the rear cover plate 4, a small distance is provided between the upper surface of the rear cover plate 4 and the inner upper surface of the housing 1, and the distance is slightly larger than the deformation distance of the elastic pressing sheet 5 under the maximum pressure, so that when a high-frequency current passes through the copper sheet pole piece 9 to polarize the piezoelectric ceramic pole piece 8 to generate mechanical energy vibration, a certain reserved space avoids rigid collision of the piezoelectric part connected into a whole by the prestressed bolt 6 to the transducer, further energy loss of the device caused by collision is reduced, and meanwhile, the sealing performance of the whole structure is prevented from being damaged. In addition, when the prestressed bolt is specifically applied, the prestressed bolt 6 is made of 40 boron steel, the high strength enables the prestressed bolt to have good anti-loosening capacity, the front cover plate and the rear cover plate are made of aluminum alloy materials, and the piezoelectric ceramic pole piece 8 is made of lead zirconate titanate materials.

In an embodiment, for the insulating sleeve 7, the sleeving position of the insulating sleeve 7 is from the upper screw of the prestressed bolt 6 to the upper surface of the front cover plate 10, so that the insulating sleeve 7 can be well fixed, and meanwhile, a good insulating effect is obtained between the prestressed bolt 6 and the piezoelectric ceramic pole piece 8, thereby preventing the piezoelectric ceramic pole piece 8 from being damaged due to the fact that the prestressed bolt 6 is broken by high-frequency current to generate heat. In addition, when specifically using, whole device is connected together fixedly by set screw 3 and prestressed bolt 6, and connects the face all perpendicular and link, and the device belongs to the high energy product, needs to guarantee each subassembly combination safety.

In one embodiment, for the front cover plate 10, the upper portion of the front cover plate 10 is cylindrical, the lower portion thereof is mesa-shaped and is externally exposed to the housing 1, the side surface of the upper portion of the front cover plate 10 is attached to the inside of the housing 1, the sealing ring 11 is located in the attached position, and the center of the lower surface of the front cover plate 10 is provided with the connecting hole 13, so that the sealing ring 11 can further ensure the sealing performance of the device. In addition, when the ultrasonic device is specifically applied, the platform-shaped design can amplify sound waves and improve the energy conversion strength, and the connecting hole 13 is convenient for connecting an amplifier commonly used by the ultrasonic device.

In conclusion, with the above technical solution of the present invention, the high frequency current polarized piezoelectric ceramic pole pieces 8 entering the transducer through the wiring hole 12 between the cover 2 and the housing 1 and connected to the copper sheet pole piece 9 are connected to the transducer, because the number of the piezoelectric ceramic pole pieces 8 connected to the two sides of the copper sheet pole piece 9 is the same, and the polarization directions of the adjacent two piezoelectric ceramic pole pieces 8 are opposite, the longitudinal vibration directions of the piezoelectric ceramic pole pieces 8 having piezoelectric effect after polarization are the same, and in the polarization process, the insulating sleeve 7 isolates and protects the prestressed bolt 6 from the piezoelectric part, the prestressed bolt 6 integrally connects the piezoelectric part in the whole device with the front and back cover plates together, the generated resonance is converted into ultrasonic waves without loss while ensuring the sealing performance of the device, and meanwhile, the elastic pressing piece 5 also prevents the local heating damage device caused by the overall impact of the high frequency vibration to the device, the sealing ring provided in the front cover plate 10 further improves the overall sealing of the device. Therefore, the device converts high-frequency electric energy into mechanical vibration with the same frequency through the piezoelectric ceramic pole piece 8, thereby generating ultrasonic waves to realize energy conversion.

By the technical scheme, 1, the device is completely sealed by the design of the prestressed bolt 6, the sealing ring 11 and the electric wire connected in the wiring hole 12, so that the function that the device can adapt to various use environments is realized; 2. through the matching of the piezoelectric ceramic pole pieces 8, the front cover plate, the rear cover plate and the like, the performance of the transducer is greatly improved compared with that of the transducer made of the traditional single ceramic material, and the performance of the device is improved; 3. through the matching of the truncated cone-shaped design of the front cover plate 10 and the connecting holes 13, the amplitude of the transducer can be further increased, and the transduction strength of the device is improved.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to help illustrate the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An ultrasonic transducer comprising a housing (1), characterized in that: the upper surface of the shell (1) is fixedly connected with a cover body (2), a plurality of fixing screws (3) are arranged between the shell (1) and the cover body (2) in a penetrating manner, the lower part of each fixing screw (3) is fixedly connected with a rear cover plate (4), an elastic pressing sheet (5) is fixedly connected between each rear cover plate (4) and the corresponding fixing screw (3), the center of the upper surface of each rear cover plate (4) is fixedly connected with a pre-stressed bolt (6) in a penetrating manner, the side surface of each pre-stressed bolt (6) is fixedly connected with an insulating sleeve (7), a plurality of piezoelectric ceramic pole pieces (8) are fixedly connected with the lower surface of each rear cover plate (4), a copper sheet pole piece (9) is fixedly connected between the piezoelectric ceramic pole pieces (8), the piezoelectric ceramic pole pieces (8) and the copper sheet pole pieces (9) are both sleeved on the outer side of the insulating sleeve (7), and the lower, and a sealing ring (11) is fixedly connected to the outer side of the upper part of the front cover plate (10).

2. The ultrasonic transducer according to claim 1, wherein the upper part of the fixing screw (3) is clamped inside the cover (2), and the lower part of the fixing screw (3) penetrates through the upper surface of the housing (1).

3. An ultrasonic transducer according to claim 2, wherein the side of the back cover plate (4) is at a distance from the inner side of the housing (1), a wiring hole (12) is arranged between the upper surface of the housing (1) and the cover (2) in a penetrating manner, and the lower end of the wiring hole (12) is located between the inner side of the cover (2) and the side of the back cover plate (4).

4. An ultrasonic transducer according to claim 3, wherein the upper surface of the back cover plate (4) is spaced from the inner upper surface of the housing (1) by a small distance which is slightly larger than the deformation distance of the resilient pressure plate (5) under maximum pressure.

5. An ultrasonic transducer according to claim 4, wherein the insulation sleeve (7) is sleeved on the upper surface of the front cover plate (10) by the upper screw of the prestressed bolt (6).

6. The ultrasonic transducer according to claim 5, wherein the upper portion of the front cover plate (10) is cylindrical, the lower portion is platform-shaped and is externally exposed out of the housing (1), the side surface of the upper portion of the front cover plate (10) is attached to the inside of the housing (1), the sealing ring (11) is located in the attached position, and the center of the lower surface of the front cover plate (10) is provided with the connecting hole (13).