CN114939522A - Pre-stress applying system, method and medium for disc-shaped transducer - Google Patents
Pre-stress applying system, method and medium for disc-shaped transducer Download PDFInfo
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- CN114939522A CN114939522A CN202210403580.3A CN202210403580A CN114939522A CN 114939522 A CN114939522 A CN 114939522A CN 202210403580 A CN202210403580 A CN 202210403580A CN 114939522 A CN114939522 A CN 114939522A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000006978 adaptation Effects 0.000 claims abstract description 4
- 239000011257 shell material Substances 0.000 claims description 64
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/50—Application to a particular transducer type
- B06B2201/55—Piezoelectric transducer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/74—Underwater
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention provides a prestress applying system, a method and a medium of a disc-shaped transducer, which relate to the technical field of underwater acoustic engineering and comprise the following steps: the device comprises an upper transducer shell, a lower transducer shell, a driving vibrator, a fastener and a positioning groove; wherein, casing size looks adaptation under casing and the transducer on the transducer to splice through the fastener and fix and form the inner chamber, the constant head tank is located the lateral wall of inner chamber, the constant head tank is arranged respectively in at the both ends of drive oscillator, just the adjustable setting of drive oscillator length. The invention can ensure that the shell of the disc-shaped transducer is always kept in a positive prestress state in the high-power transmitting process, and improve the stability of the transducer in the high-power state.
Description
Technical Field
The invention relates to the technical field of underwater acoustic engineering, in particular to a prestress applying system, method and medium of a disc-shaped transducer.
Background
The underwater acoustic engineering technology is currently the main information technology in the fields of ocean observation and underwater target detection, and is the first interest for human beings to explore the ocean. The underwater acoustic transducer as the "otoscope" of the sonar system is an important component of the underwater acoustic engineering technology. The low-frequency high-power underwater acoustic transducer can emit low-frequency sound waves, has longer action distance due to smaller propagation attenuation, and is a research hotspot of experts in various countries at present. Common low frequency transducers are flextensional transducers, helmholtz transducers, moving coil transducers, and the like. The flextensional transducer generally has poor pressure resistance, and taking a typical III-type flextensional transducer as an example, in order to reduce the resonant frequency of the flextensional transducer, the casing is generally required to be slotted, so that the flextensional transducer has poor pressure resistance and cannot adapt to a large-depth working environment; the Helmholtz transducer has overlarge volume and weight and is difficult to popularize and use in a large range; the moving coil transducer generally needs to be matched with an air bag for pressure balance, the performance changes obviously along with the depth, and the moving coil transducer has larger limitation in engineering application; in recent years, the disc-shaped transducer developed by the unit becomes a better solution in the field of low-frequency transducers due to better low-frequency performance, wider working frequency band, moderate volume-weight ratio and good hydrostatic pressure resistance.
However, the pre-stressing of the disc-shaped transducer is a difficult problem to study with this type of transducer. Because piezoelectric ceramic resistance to compression does not tensile characteristic, the purpose that traditional low frequency transducer applyed prestressing force is in order to guarantee that the piezoelectric ceramic oscillator is in the compression state all the time at the vibration in-process to improve transducer radiation power limit. The transducer structure that dish-shaped transducer adopted not only needs to exert prestressing force for piezoceramics, still needs the matching structure of reasonable design drive oscillator and transducer casing. When the prestress is overlarge, the stress of the main vibration area of the shell exceeds the yield limit of the material, and the shell is subjected to irreversible deformation to influence the watertight and vibration characteristics of the transducer; when the prestress is too small, the transducer may be separated from the vibrator during transmission, and the radiation sound source level is lowered. Therefore, intensive research into a prestressing method of a disc-shaped transducer is required.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a prestress applying system, a prestress applying method and a prestress applying medium for a disc-shaped transducer.
According to the prestress applying system, method and medium of the disc-shaped transducer provided by the invention, the scheme is as follows:
in a first aspect, there is provided a pre-stress application system for a disc transducer, the system comprising: the device comprises an upper transducer shell, a lower transducer shell, a driving vibrator, a fastener and a positioning groove;
the utility model discloses a drive oscillator, including the transducer, the transducer is gone up casing and transducer casing size looks adaptation to splice fixed formation inner chamber through the fastener, the constant head tank is located the lateral wall of inner chamber, the constant head tank is arranged in respectively at the both ends of drive oscillator, just drive oscillator adjustable length sets up.
Preferably, the transducer upper shell and the transducer lower shell are both in a circular truncated cone shape; and when the transducer is spliced, the lower bottom surfaces of the upper shell and the lower shell of the transducer are close to each other.
Preferably, the positioning grooves in the inner cavity are respectively formed in two side walls of the transducer upper shell and the transducer lower shell, which are farthest away from each other, and two ends of the driving vibrator respectively abut against the positioning grooves in the matching manner.
Preferably, the length of the driving vibrator is adjusted by bonding metal cushion blocks with different thicknesses at two ends.
Preferably, the length of the driving vibrator is larger than the maximum vertical height of the inner cavity.
Preferably, the fastener is a fastening screw.
In a second aspect, there is provided a method of prestressing a disc transducer, the method comprising:
step S1: calculating the maximum displacement W1 of the shell vibration according to the maximum sound source level of the transducer;
step S2: calculating the displacement W2 of the shell and the maximum stress Y1 of the shell after the fastener is tightened when the height of the gap of the shell in a natural state is a;
step S3: determining the length of the drive vibrator based on step S1 and step S2;
step S4: and (5) placing the driving vibrators with the length in the step (S3) in the grooves in the upper shell and the lower shell, and tightening the fasteners to enable the upper shell of the transducer and the lower shell of the transducer to be tightly attached.
Preferably, the step S3 includes: the size of the gap height a is adjusted so that W2 is larger than W1, Y1 is smaller than the yield strength Y0 of the shell material, and the length of the driving vibrator at the moment is obtained.
In a third aspect, a computer-readable storage medium is provided, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method as set forth in the claims.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the design of the positioning groove, the prestress distribution in the circumferential direction of the shell is more uniform, and the horizontal directional fluctuation of the transducer is reduced.
2. The invention quantifies the prestress of the shell through simulation calculation, ensures that the shell of the disc-shaped transducer always keeps a positive prestress state in the high-power transmitting process, and improves the stability of the transducer in the high-power state.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an overall schematic view of a disc transducer;
FIG. 2 is a maximum sound level displacement distribution;
FIG. 3 illustrates the case stress after the pre-stress is applied.
Reference numerals:
transducer upper housing 1 transducer lower housing 2
Fastener 4 of driving vibrator 3
Locating slot 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 invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.
The embodiment of the invention provides a prestress applying system of a disc-shaped transducer, and as shown in figure 1, an upper shell 1 of the transducer, a lower shell 2 of the transducer, a driving vibrator 3, a fastener 4 and a positioning groove 5 are provided, wherein the fastener 4 in the embodiment adopts a fastening screw.
The transducer upper shell 1 and the transducer lower shell 2 are matched in size and are spliced and fixed through a fastening piece 4 to form an inner cavity; the constant head tank 5 is located the lateral wall of inner chamber, and sets up respectively on the both sides wall that casing 1 and transducer lower casing 2 mutual distance are furthest on the transducer, and the both ends of drive oscillator 3 are contradicted respectively in the constant head tank 5 of looks adaptation.
The upper shell 1 and the lower shell 2 of the transducer are both in a circular truncated cone shape; when splicing, the lower bottom surfaces of the upper transducer casing 1 and the lower transducer casing 2 are close to each other.
The length of the driving vibrator 3 can be adjusted, the length of the driving vibrator is adjusted by bonding metal cushion blocks with different thicknesses at two ends of the driving vibrator 3, and the length of the driving vibrator 3 is larger than the maximum vertical height of the inner cavity.
The invention also provides a prestress application method of the disc-shaped transducer, which specifically comprises the following steps with reference to fig. 2 and 3:
step S1: the maximum displacement W1 of the shell at the maximum sound source level of the disc-shaped transducer is calculated by finite element software.
Step S2: the gap height of the upper transducer shell 1 and the lower transducer shell 2 is a in a natural state; the shell maximum stress Y1 was calculated by finite element software as shell displacement W2 when fastener 4 was tightened at a gap height of a.
Step S3: the gap height a is adjusted to a size that W2 is larger than W1, and Y1 is smaller than the yield strength of the casing material Y0 (the yield strength of the material in this embodiment is one of the inherent properties of the material, and can be obtained by table lookup), so that the length of the driving vibrator 3 at this time is the sum of the gap height a and the maximum vertical height of the inner cavity.
Step S4: and (5) placing the driving vibrator 3 with the length in the step (S3) in the grooves in the upper shell and the lower shell, and tightening the fastening piece 4 to enable the upper shell and the lower shell to be tightly attached without a gap. Through the matching of the length of the driving vibrator 3 and the maximum vertical height of the inner cavity, the shell of the disc-shaped transducer is always kept in a positive prestress state in the high-power transmitting process, and the stability of the transducer in the high-power state is improved.
Next, the present invention will be described more specifically.
The invention aims to solve the problem of prestress application of a disc-shaped transducer, and researches a prestress application method of the disc-shaped transducer. The purpose is that through the matching structure of the driving vibrator 3 and the transducer shell, on the premise that the shell is not subjected to yield deformation, the piezoelectric ceramic vibrator is enabled to obtain appropriate prestress, the shell of the transducer can be always kept in a positive prestress state in the high-power transmitting process, the stability of the transducer in the high-power transmitting state is improved, and waveform distortion is avoided.
Referring to fig. 2, when the maximum displacement W1 of the housing vibration is calculated from the transducer maximum sound source level and the housing gap is calculated as a, the housing maximum stress Y1 is calculated when the fasteners 4 are tightened to achieve the housing displacement W2, as shown in fig. 3. The size of the gap a is adjusted so that W2 is larger than W1 and Y1 is smaller than the case material yield strength Y0, resulting in the length of the driving vibrator 3 at that time. The driving vibrator 3 with the length is arranged in the grooves in the upper shell and the lower shell, and the fastening screws are tightened to enable the upper shell and the lower shell to be tightly attached.
The embodiment of the invention provides a prestress applying system, a prestress applying method and a prestress applying medium for a disc-shaped transducer, wherein a matching structure of a driving vibrator and a transducer shell is reasonably designed, so that the shell of the transducer is always kept in a positive prestress state in the high-power transmitting process on the premise of ensuring that the shell does not generate yield deformation, the stability of the transducer in the high-power transmitting state is improved, and waveform distortion is avoided.
The present invention quantifies the application of pre-stress. Through adjusting the length of the driving vibrator, the prestress of the shell is always in a reasonable range in the vibration process, and the power limit of the transducer is obviously improved.
In the description of the present application, it is to 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 those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. A pre-stress application system for a disc transducer, comprising: the device comprises an upper transducer shell (1), a lower transducer shell (2), a driving vibrator (3), a fastener (4) and a positioning groove (5);
wherein, casing (2) size looks adaptation under casing (1) and the transducer on the transducer to splice through fastener (4) and fix and form the inner chamber, constant head tank (5) are located the lateral wall of inner chamber, constant head tank (5) are arranged respectively in at the both ends of drive oscillator (3), just drive oscillator (3) adjustable length setting.
2. The prestressing system of a disc-shaped transducer according to claim 1, wherein the transducer upper case (1) and the transducer lower case (2) are each truncated cone-shaped; when in splicing, the lower bottom surfaces of the upper shell (1) and the lower shell (2) of the transducer are close to each other.
3. The prestress application system for a disc-shaped transducer according to claim 2, wherein the positioning grooves (5) in the inner cavity are respectively arranged on two side walls of the upper shell (1) and the lower shell (2) of the transducer, which are farthest away from each other, and two ends of the driving vibrator (3) respectively abut against the positioning grooves (5) which are matched with each other.
4. The prestressing system of a disc-shaped transducer according to claim 3, wherein the driving vibrator (3) is adjusted in length by bonding both ends with metal spacers of different thicknesses.
5. The prestressing system of a disc-shaped transducer according to claim 4, wherein the length of the driving vibrator (3) is greater than the maximum vertical height of the inner cavity.
6. The prestressing system of a disc-shaped transducer according to claim 1, wherein the fastening member (4) is a fastening screw.
7. A prestressing method for a disc-shaped transducer, based on the prestressing system for a disc-shaped transducer according to any one of claims 1 to 6, comprising:
step S1: calculating the maximum displacement W1 of the shell vibration according to the maximum sound source level of the transducer;
step S2: calculating the displacement W2 of the shell and the maximum stress Y1 of the shell after the fastener (4) is tightened when the height of the gap of the shell in a natural state is a;
step S3: determining the length of the drive vibrator (3) based on step S1 and step S2;
step S4: and (5) placing the driving vibrator (3) with the length in the step (S3) in the grooves in the upper shell and the lower shell, and tightening the fastener (4) to enable the upper shell (1) of the transducer and the lower shell (2) of the transducer to be tightly attached.
8. The method for prestressing a disc transducer according to claim 7, wherein the step S3 includes: the size of the gap height a is adjusted to ensure that W2 is larger than W1, Y1 is smaller than the yield strength Y0 of the shell material, and the length of the driving vibrator (3) at the moment is obtained.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 7 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403580.3A CN114939522B (en) | 2022-04-18 | 2022-04-18 | Prestress application system, method and medium for disk-shaped transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210403580.3A CN114939522B (en) | 2022-04-18 | 2022-04-18 | Prestress application system, method and medium for disk-shaped transducer |
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| Publication Number | Publication Date |
|---|---|
| CN114939522A true CN114939522A (en) | 2022-08-26 |
| CN114939522B CN114939522B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210403580.3A Active CN114939522B (en) | 2022-04-18 | 2022-04-18 | Prestress application system, method and medium for disk-shaped transducer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969726A (en) * | 1985-06-03 | 1990-11-13 | Northrop Corporation | Ring laser gyro path-length-control mechanism |
| CN2643591Y (en) * | 2003-07-04 | 2004-09-22 | 张洪平 | Underwater loudspeaker |
| CN101093667A (en) * | 2006-06-23 | 2007-12-26 | 北京大学 | Dish type transmitting transducer |
| US20100237748A1 (en) * | 2007-02-08 | 2010-09-23 | The Boeing Company | Spring disc energy harvester apparatus and method |
| CN111541979A (en) * | 2020-04-07 | 2020-08-14 | 湖南大学 | Magnetostrictive flextensional electroacoustic transducer |
-
2022
- 2022-04-18 CN CN202210403580.3A patent/CN114939522B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969726A (en) * | 1985-06-03 | 1990-11-13 | Northrop Corporation | Ring laser gyro path-length-control mechanism |
| CN2643591Y (en) * | 2003-07-04 | 2004-09-22 | 张洪平 | Underwater loudspeaker |
| CN101093667A (en) * | 2006-06-23 | 2007-12-26 | 北京大学 | Dish type transmitting transducer |
| US20100237748A1 (en) * | 2007-02-08 | 2010-09-23 | The Boeing Company | Spring disc energy harvester apparatus and method |
| CN111541979A (en) * | 2020-04-07 | 2020-08-14 | 湖南大学 | Magnetostrictive flextensional electroacoustic transducer |
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| Publication number | Publication date |
|---|---|
| CN114939522B (en) | 2024-05-07 |
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