CN105689248A - Cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer - Google Patents
Cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer Download PDFInfo
- Publication number
- CN105689248A CN105689248A CN201610163649.4A CN201610163649A CN105689248A CN 105689248 A CN105689248 A CN 105689248A CN 201610163649 A CN201610163649 A CN 201610163649A CN 105689248 A CN105689248 A CN 105689248A
- Authority
- CN
- China
- Prior art keywords
- cross
- transducer
- piezoelectric
- orthogonal
- piezoelectricity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 150000001875 compounds Chemical class 0.000 title abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 81
- 230000005855 radiation Effects 0.000 claims abstract description 57
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims description 51
- 239000000126 substance Substances 0.000 claims description 30
- 230000005284 excitation Effects 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract 3
- 235000012431 wafers Nutrition 0.000 description 36
- 230000000694 effects Effects 0.000 description 7
- 238000002604 ultrasonography Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002525 ultrasonication Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 241000411851 herbal medicine Species 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention provides a cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer and relates to the field of ultrasonic transducers. The cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer comprises a radial radiation shell, a conical prestress elastic expanding structure, a cross-shaped orthogonal compound center mass block, four sets of piezoelectric ceramic crystal stacks and four outer mass blocks. The cross-shaped orthogonal compound center mass block comprises four composition parts, and one cylindrical hole and two conical holes are defined by the inner side faces of the composition parts. The expanding structure comprises a fixing device and two conical expanding bodies. The expanding bodies are inserted in the conical holes. Each piezoelectric ceramic crystal stack is formed by stacking electrode plates and an even number of piezoelectric ceramic crystals. The electrode plates on the inner layers are in butt joint with the outer side faces of the composition parts, and the electrode plates on the outer layers are in butt joint with the inner end faces of the outer mass blocks. The other ends of the four outer mass blocks are in butt joint with the inner wall of the radial radiation shell. The technical problem that dead zones of a sound field and the standing wave characteristic exist in an ultrasonic transducer in the prior art, and consequently the radial ultrasonic radiation strength is weak is solved.
Description
Technical field
The present invention relates to ultrasonic transducer field, especially relate to a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity。
Background technology
The function of ultrasonic transducer is the electrical power of input to convert to mechanical output (i.e. ultrasound wave) pass again, and a part of power that autophage is little。
In power ultrasonic and underwater acoustic technology field, sandwich extensional vibration piezoelectric ultrasonic transducer is most widely used。This transducer is invented by French scientist Langevin, has that simple in construction, power capacity be relatively big and electromechanical conversion efficiency advantages of higher。Along with development and the extensive use of ultrasonic technique of science and technology, ultrasonic obtain important application in many new technical field (such as the extraction of ultrasonic Chinese herbal medicine, ultrasonic sewage disposal, ultrasonic oil-production and sonochemistry reaction etc.)。
In these new technical field, radiant power and acoustic wave action scope to ultrasonic transducer are had higher requirement: high-power, high efficiency and all-directional ultrasonic radiation。For existing sandwich extensional vibration piezoelectric ultrasonic transducer, restriction due to himself theory and structure, single sandwich extensional vibration piezoelectric ultrasonic transducer also exists the weak point such as limited power capacity, single, the ultrasonic radiation limited area in ultrasonication direction, therefore, it is difficult to meet the characteristic that high-power, all-directional ultrasonic required in new ultrasonic technique radiates。At present, in order to improve the weak point of single sandwich extensional vibration piezoelectric ultrasonic transducer, grown up following a few class ultrasonic transducer。
(1) arrayed ultrasonic transducer。By forming array sound source to radiative acoustic wave in liquid at the bonding string of container bottom or surrounding or multiple row sandwich extensional vibration piezoelectric ultrasonic transducer。Although array sound source can solve ultrasonication area that single sandwich transducer exists and the weak point such as quantity of power is limited and acoustic irradiation direction is single, but owing to longitudinal transducer oscillator radiating surface is plane, its radiated sound field directivity is strong, being usually present sound field " blind area ", this is also restrict such transducer liquid ultrasonic treatment usefulness " bottleneck "。
(2) push-pull transducer。Its operation principle is the compressional vibration by two sandwich Longitudinal Piezoelectric Transducers being coupling in metal circular tube two ends, pipe produces longitudinal push-and-pull action and radially produces radiating acoustic energy at pipe。From the physical dimension of push-pull transducer and acoustic irradiation characteristic, the vibration of such transducer belongs to the high-order longitudinal vibration of the compressional vibration excitation metal circular tube of sandwich Longitudinal Piezoelectric Transducer, owing to poisson effect produces Radial Coupling vibration under the high-order longitudinal vibration mode of pipe。Therefore, although such transducer can solve the weak points such as single, the ultrasonic radiation limited area in ultrasonication direction of single sandwich extensional vibration piezoelectric ultrasonic transducer existence, but owing to the master of such transducer operationally system shakes direction still in longitudinal direction, there is the weak point that Radial Coupling vibration is relatively weak and radial ultrasonic radiant intensity is also more weak produced by poisson effect。Additionally, due to metal circular tube works in high-order longitudinal vibration mode, its radiated sound field longitudinally has significantly " stationary wave characteristic "。
Based on this, the invention provides a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity to solve above-mentioned technical problem。
Summary of the invention
It is an object of the invention to provide a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity, there is sound field " blind area " solving arrayed ultrasonic transducer of the prior art, and push-pull transducer radial ultrasonic radiant intensity is more weak, radiated sound field longitudinally has the technical problem of significantly " stationary wave characteristic "。
Providing a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity in an embodiment of the present invention, the described cross orthogonal composite flooding tubular transducer of piezoelectricity includes cross orthogonal composite sandwich formula piezoelectric excitation source and cylindric radial radiation housing；Described radial radiation housing is sleeved on outside described cross orthogonal composite sandwich formula piezoelectric excitation source；
Described cross orthogonal composite sandwich formula piezoelectric excitation source includes taper prestressing force elastic expansion structure, cross orthogonal complex centre mass, outer mass that piezoelectric ceramics crystalline substance heap that four groups of structures are identical is identical with four shapes；
Described cross orthogonal complex centre mass includes four block-shaped identical composition portions, and four pieces of described composition portion centrosymmetry are placed；Described in four groups, piezoelectric ceramics crystalline substance heap is placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass；Four described outer masses are placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass；
The medial surface in four described composition portions surrounds a cylindrical hole and two identical bellmouths；The small end of two described bellmouths is through with described cylindrical hole respectively；
Described taper prestressing force elastic expansion structure includes fixing device and the identical expansion cone of two shapes；Two described expansion cone are inserted in two described bellmouths by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap to stack together by the piezoelectric ceramic wafer that even slice shape is identical, being mounted on metal electrode film between piezoelectric ceramic wafer described in adjacent two panels, the outside of the described piezoelectric ceramic wafer being positioned at two ends is also separately installed with described metal electrode film；Adjacent described electrode slice connects opposite polarity electrode；
The lateral surface in four described composition portions is plane, and the inner face of four described outer masses is plane；The lateral surface of described electrode slice and one of described composition portion that each described piezoelectric ceramics crystalline substance piles one end abuts, and the inner face of the described electrode slice mass outer with one of them described of the other end abuts；
The other end of four described outer masses abuts with the inwall of described radial radiation housing。
Optionally, described fixing device is pre-stressed bolt, and described pre-stressed bolt includes double threaded screw and two nuts, and described double threaded screw is inserted in described cylindrical hole；
Two described expansion cone are respectively arranged with centre bore, and two described expansion cone are set on described double threaded screw by described centre bore；
Two described nuts are spirally connected with the two ends of described double threaded screw respectively。
Optionally, four pieces of described composition portions are sequentially connected with by four identical connectors, and four described connectors are centrosymmetric placement。
Optionally, described cross orthogonal complex centre mass is one-body molded。
Optionally, described piezoelectric ceramic wafer is circular。
Optionally, described electrode slice includes electrode portion and connecting portion, and described connecting portion is affixed with described electrode portion, and described connecting portion is for being connected with power supply；Described electrode portion is the circle identical with described piezoelectric ceramic wafer profile, and described electrode portion overlaps with described piezoelectric ceramic wafer and stacks。
Optionally, four described outer masses and described radial radiation housing integrated molding。
Optionally, described radial radiation housing two ends have also been respectively and fixedly connected with waterproof sealing lid。
Optionally, two described waterproof sealing lids are connected by screw with described radial radiation housing。
Optionally, it is respectively arranged with sealing ring between two described waterproof sealing lids and described radial radiation housing。
The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, is divided into two types according to its vibration mode: one is that forced vibration is compound；Another kind is that simultaneous resonance is compound。
Compound for forced vibration, its operation principle is that the design of the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source works under orthogonal longitudinal resonance mode, switch on power, regulate frequency and the matching condition of power supply, when the driving frequency of power supply is consistent to the longitudinal resonance frequencies of the corresponding order in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source, cross orthogonal composite sandwich formula piezoelectric excitation source is by the alternation extensional vibration expanded along its orthogonal direction and shrink and directly drives radial radiation housing to make to be forced to complex vibration, thus to radiation housing radial radiation sound wave。
Compound for simultaneous resonance, the radial direction resonant frequency with its external radiation housing that its operation principle is the orthogonal longitudinal resonance frequencies design in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source is identical。Switch on power, regulate frequency and the matching condition of power supply, when the driving frequency of power supply is consistent with the radial direction resonant frequency of the radiation housing of the longitudinal resonance frequencies in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source and outside, the extensional vibration in internal cross orthogonal composite sandwich formula piezoelectric excitation source excites the radial vibration of external radiation housing along the radial direction of radiation housing, thus the vertical footpath compound simultaneous resonance realized between inside and outside two parts to the radial radiation sound wave of radiation housing。
Piezoelectric ceramics has the following characteristics that when voltage acts on piezoelectric ceramics, will produce mechanically deform with the change of voltage and frequency。On the other hand, when piezoelectric ceramics is subject to the effect of external force and deforms, its two comparative electrode faces produce positive and negative opposite charge。Utilize this principle, just piezoelectric ceramics can be used as ultrasonic transducer。The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, utilizes the feature of piezoelectric ceramics, produces ultrasound wave。Insert bellmouth by expansion cone, make four described composition portion outward expansion at center, give piezoelectric ceramic wafer one outside prestressing force。And four the described outer masses being positioned at outside give piezoelectric ceramic wafer one inside prestressing force under the effect of radial radiation housing, radial radiation housing adopts metal material, and rigidity is bigger, using the teaching of the invention it is possible to provide enough prestressing force。So be equivalent to define the orthogonal compound of cross of similar two groups of traditional sandwich piezoelectric transducer。The degree of depth that expansion cone inserts determines prestressed size。Excessive prestressing force makes piezoelectric ceramic wafer press too tight, thus suppressing it to vibrate。Too small prestressing force easily makes piezoelectric ceramic wafer pressure get Tai Song, excesssive gap, it is easy to be shattered。So that a suitable prestressing force scope, namely suitable insertion depth, this insertion depth is determined by mathematical calculation when designing and experiment, the application difference by insertion depth, realize prestressing force adjustable, it is adaptable to different situations, be adjustable to suitable prestressing force。
The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, overall structure is centrosymmetric, radiation ultrasound wave is very uniform towards periphery, it is absent from sound field " blind area ", produce ultrasound wave by four groups of piezoelectric ceramics crystalline substance heaps, utilize the extensional vibration that piezoelectric ceramics crystalline substance is piled to drive the radial vibration of tubular radial radiation housing。The employing tradition simple in construction of sandwich piezoelectric transducer, the advantage that power capacity is big, reach the structure of the improvement tubular transducer of existing radial compound and improved the purpose of its power capacity, radial ultrasonic radiant intensity is relatively strong, is absent from longitudinal " stationary wave characteristic "。
Adopting taper prestressing force elastic expansion structure, four groups of internal piezoelectric ceramics crystalline substance heaps are applied inside and outside two-way prestressing force by collaborative outer tubular housing, and the power density of tubular transducer is greatly improved。Meanwhile, expanding prestressing mechanism also enhances the radial rigidity of this orthogonal tubular transducer of composite flooding piezoelectricity。Arranging externally-located outer mass and give the prestressing force that piezoelectric ceramic wafer is inside, fixed effect is relatively good, improves the rigidity of whole device, and then improves the entirety vibrations performance of whole transducer。So as to apply also for High Voltage environment, as underwater sound transmitting transducer in deep-well oil-extraction acoustic emission transducer, deep-sea etc., expanded its range of application。In addition, owing to the prestressing force of the piezoelectric ceramics crystalline substance heap of the inside of the application is to be applied by the collaborative outer tubular housing of taper prestressing force elastic expansion structure, thus eliminating the center pre-stressed bolt of traditional sandwich piezoelectric transducer, therefore its stack of piezo crystals can use whole piece piezoelectric ceramic wafer to replace traditional piezoelectric ring used by sandwich piezoelectric transducer。Therefore, the application adopts the piezoelectric ceramics crystalline substance heap that the stack of piezo crystals that piezoelectric ceramic wafer forms is made up of annular piezoelectric ceramic wafer than traditional sandwich piezoelectric transducer to have bigger volume, thus further increasing the power capacity of transducer。Power is more big, and radial ultrasonic radiant intensity is more strong, is also absent from longitudinal " stationary wave characteristic " simultaneously。
Based on this, the application utilizes the extensional vibration that piezoelectric ceramics crystalline substance is piled to drive the radial vibration of tubular radial radiation housing, it is achieved the high power work of transducer and radially comprehensive acoustic irradiation, is absent from sound field " blind area " and longitudinal " stationary wave characteristic "。The advantages such as the application has that power is big, efficiency is high, radially the prestressing force of Omnidirectional radiation sound wave and transducer is adjustable, can be widely applied to the technical fields such as ultrasonic oil-production, underwater sound transmitting transducer, ultrasonic cleaning, supersound extraction, ultrasonic emulsification, Ultrasonic Pulverization and sonochemistry liquid handling。
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparent, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is the structural representation of the embodiment cross orthogonal composite flooding tubular transducer of piezoelectricity；
Fig. 2 is the sectional view of the embodiment cross orthogonal composite flooding tubular transducer of piezoelectricity；
Fig. 3 is the structural representation in embodiment cross orthogonal composite sandwich formula piezoelectric excitation source；
Fig. 4 is embodiment pre-stressed bolt and the exploded perspective view of cross orthogonal complex centre mass coupling；
Fig. 5 is the top view of cross orthogonal complex centre mass；
Fig. 6 is that the A of cross orthogonal complex centre mass is to sectional view；
Fig. 7 is the structural representation of embodiment piezoelectric ceramics crystalline substance heap；
Fig. 8 is the front view of embodiment piezoelectric ceramics crystalline substance heap。
Accompanying drawing labelling:
1-radial radiation housing；2-taper prestressing force elastic expansion structure；3-cross orthogonal complex centre mass；
4-piezoelectric ceramics crystalline substance is piled；The outer mass of 5-；6-cylindrical hole；
7-bellmouth；8-expansion cone；9-double threaded screw；
10-nut；11-centre bore；12-piezoelectric ceramic wafer；
13-electrode slice；14-waterproof sealing lid；31-composition portion。
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention。Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or hint relative importance。
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or the connection of one；Can be mechanically connected, it is also possible to be that electric welding connects；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals。For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention。
Embodiment one
As shown in figures 1-8, providing a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity in the present embodiment, the described cross orthogonal composite flooding tubular transducer of piezoelectricity includes cross orthogonal composite sandwich formula piezoelectric excitation source and cylindric radial radiation housing 1；Described radial radiation housing 1 is sleeved on outside described cross orthogonal composite sandwich formula piezoelectric excitation source；
The piezoelectric ceramics crystalline substance that described cross orthogonal composite sandwich formula piezoelectric excitation source includes taper prestressing force elastic expansion structure 2, mass 3, four groups of structures in cross orthogonal complex centre are identical piles the 4 outer masses 5 identical with four shapes；
Described cross orthogonal complex centre mass 3 includes four block-shaped identical composition portions 31, and four pieces of described composition portion 31 centrosymmetry are placed；Described in four groups, piezoelectric ceramics crystalline substance heap 4 is placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass 3；Four described outer masses 5 are placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass 3；
The medial surface in four described composition portions 31 surrounds cylindrical hole 6 bellmouth identical with two 7；The small end of two described bellmouths 7 is through with described cylindrical hole 6 respectively；
Described taper prestressing force elastic expansion structure 2 includes fixing device and the identical expansion cone 8 of two shapes；Two described expansion cone 8 are inserted in two described bellmouths 7 by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap 4 to stack together by the piezoelectric ceramic wafer 12 that even slice shape is identical, being mounted on metal electrode film 13 described in adjacent two panels between piezoelectric ceramic wafer 12, the outside being positioned at the described piezoelectric ceramic wafer 12 at two ends is also separately installed with described metal electrode film 13；Adjacent described electrode slice 13 connects opposite polarity electrode；In the present embodiment, often group piezoelectric ceramics crystalline substance heap 4 includes four disc piezoelectric ceramic wafers, for convenience of understanding, is denoted as 12a, 12b, 12c and 12d in figure。Between adjacent two panels piezoelectric ceramic wafer, the outside with piezoelectric ceramic wafer 12a, 12d is separately installed with electrode slice, for convenience of statement, is denoted as 13a, 13b, 13c, 13d and 13e in the drawings。Electrode slice 13a, 13c and 13e connect the negative pole of power supply, and electrode slice 13b and 13d connects positive source。
The lateral surface in four described composition portions 31 is plane, and the inner face of four described outer masses 5 is plane；The lateral surface of described electrode slice (13a) and one of described composition portion 31 that each described piezoelectric ceramics crystalline substance piles one end abuts, and the inner face of described electrode slice (13e) mass 5 outer with one of them described of the other end abuts；
The other end of four described outer masses 5 abuts with the inwall of described radial radiation housing 1。
The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, is divided into two types according to its vibration mode: one is that forced vibration is compound；Another kind is that simultaneous resonance is compound。
Compound for forced vibration, its operation principle is that the design of the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source works under orthogonal longitudinal resonance mode, switch on power, regulate frequency and the matching condition of power supply, when the driving frequency of power supply is consistent to the longitudinal resonance frequencies of the corresponding order in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source, cross orthogonal composite sandwich formula piezoelectric excitation source is by the alternation extensional vibration expanded along its orthogonal direction and shrink and directly drives radial radiation housing 1 to make to be forced to complex vibration, thus to radiation housing radial radiation sound wave。
Compound for simultaneous resonance, the radial direction resonant frequency with its external radiation housing that its operation principle is the orthogonal longitudinal resonance frequencies design in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source is identical。Switch on power, regulate frequency and the matching condition of power supply, when the driving frequency of power supply is consistent with the radial direction resonant frequency of the radiation housing of the longitudinal resonance frequencies in the orthogonal composite sandwich formula piezoelectric excitation of the cross within transducer source and outside, the extensional vibration in internal cross orthogonal composite sandwich formula piezoelectric excitation source excites the radial vibration of external radiation housing along the radial direction of radiation housing, thus the vertical footpath compound simultaneous resonance realized between inside and outside two parts to the radial radiation sound wave of radiation housing。
The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, utilizes the feature of piezoelectric ceramics to produce ultrasound wave。Insert bellmouth 7 by expansion cone 8, make four described composition portion 31 outward expansion at center, give piezoelectric ceramic wafer 12 1 outside prestressing force。And four the described outer masses 5 being positioned at outside give piezoelectric ceramic wafer 12 1 inside prestressing force under the effect of radial radiation housing 1。So be equivalent to define the orthogonal compound of cross of similar two groups of traditional sandwich piezoelectric transducer。The degree of depth that expansion cone 8 inserts determines prestressed size。Excessive prestressing force makes piezoelectric ceramic wafer 12 press too tight, thus suppressing it to vibrate。Too small prestressing force easily makes piezoelectric ceramic wafer 12 press get Tai Song, excesssive gap, it is easy to be shattered。So that a suitable prestressing force scope, namely suitable insertion depth, this insertion depth is determined by mathematical calculation when designing and experiment, the application difference by insertion depth, realize prestressing force adjustable, it is adaptable to different situations, be adjustable to suitable prestressing force。
The described cross provided by the invention orthogonal composite flooding tubular transducer of piezoelectricity, overall structure is centrosymmetric, and radiation ultrasound wave is very uniform towards periphery, is absent from sound field " blind area "。Pile 4 generation ultrasound wave by four groups of piezoelectric ceramics crystalline substances, utilize the extensional vibration of piezoelectric ceramics crystalline substance heap 4 to drive the radial vibration of tubular radial radiation housing 1。The utilization tradition simple in construction of sandwich piezoelectric transducer, the advantage that power capacity is big, reached the structure of the improvement tubular transducer of existing radial compound and improved the purpose of its power capacity。The application radial ultrasonic radiant intensity is relatively strong, is absent from longitudinal " stationary wave characteristic "。
Adopting taper prestressing force elastic expansion structure 2, collaborative outer tubular housing, to internal four groups of piezoelectric ceramics crystalline substance heaps 4 inside and outside two-way prestressing force of applying, is greatly improved the power density of tubular transducer。Simultaneously, expanding prestressing mechanism also enhances the radial rigidity of this orthogonal tubular transducer of composite flooding piezoelectricity, externally-located outer mass 5 is set and gives piezoelectric ceramic wafer 12 prestressing force, fixed effect is relatively good, improve the rigidity of whole device, and then improve the body vibration performance of whole transducer。So as to apply also for High Voltage environment, as underwater sound transmitting transducer in deep-well oil-extraction acoustic emission transducer, deep-sea etc., expanded its range of application。In addition, owing to the prestressing force of the piezoelectric ceramics crystalline substance heap 4 of the inside of the application is to be worked in coordination with outer tubular housing by taper prestressing force elastic expansion structure 2 to apply, thus eliminate the center pre-stressed bolt of traditional sandwich piezoelectric transducer, therefore its stack of piezo crystals can replace the piezoelectric ring used by traditional sandwich piezoelectric transducer with whole piece piezoelectric ceramic wafer 12。Therefore, the application adopts the piezoelectric ceramics crystalline substance heap 4 that the stack of piezo crystals that ceramic wafers forms is made up of annular piezoelectric ceramic wafer than traditional sandwich piezoelectric transducer to have bigger volume, thus further increasing the power capacity of transducer。Power is more big, and radial ultrasonic radiant intensity is more strong, is also absent from longitudinal " stationary wave characteristic " simultaneously。
Based on this, the application utilizes the extensional vibration of piezoelectric ceramics crystalline substance heap 4 to drive the radial vibration of tubular radial radiation housing 1, it is achieved the high power work of transducer and radially comprehensive acoustic irradiation, is absent from sound field " blind area " and longitudinal " stationary wave characteristic "。The advantages such as the application has that power is big, efficiency is high, radially the prestressing force of omnidirectional emission sound wave and transducer is adjustable, can be widely applied to the technical fields such as ultrasonic oil-production, underwater sound transmitting transducer, ultrasonic cleaning, supersound extraction, ultrasonic emulsification, Ultrasonic Pulverization and sonochemistry liquid handling。
Such as Fig. 1-6, in the alternative of the present embodiment, described fixing device is pre-stressed bolt, and described pre-stressed bolt includes double threaded screw 9 and two nuts 10, and described double threaded screw 9 is inserted in described cylindrical hole 6；
Two described expansion cone 8 are respectively arranged with centre bore 11, and two described expansion cone 8 are set on described double threaded screw 9 by described centre bore 11；
Two described nuts 10 are spirally connected with the two ends of described double threaded screw 9 respectively。
So arrange, two described nuts 10 by rotating two ends clockwise and anticlockwise, regulate two described expansion cone 8 and insert the degree of depth in two described bellmouths 7, often organize, thus regulating, the prestressing force that described piezoelectric ceramics crystalline substance heap 4 is subject to, simple in construction, easy to adjust。
In the alternative of the present embodiment, four pieces of described composition portions 31 are sequentially connected with by four identical connectors, and four described connectors are centrosymmetric placement。
Four described composition portions 31 are connected together, it is simple to assemble, convenient when assembling than the composition portion 31 of four individualisms,
Further, described cross orthogonal complex centre mass 3 is one-body molded。
Described cross orthogonal complex centre mass 3 is one-body molded, four U-shaped slits of central ablation, makes four composition portions 31 separated but still in each other's thoughts, assembles easily, and processing is also convenient for。
Such as Fig. 7 and 8, in the alternative of the present embodiment, described piezoelectric ceramic wafer 12 is circular。
Circular piezoelectric ceramic wafer 12 is prone to processing, than traditional sandwich piezoelectric transducer, it is not necessary to center pre-stressed bolt is fixed。Under external diameter same case, the application adopts the piezoelectric ceramics crystalline substance heap that the stack of piezo crystals 4 that disc piezoelectric ceramic wafer forms is made up of annular piezoelectric ceramic wafer than traditional sandwich piezoelectric transducer to have bigger volume, thus further increasing the power capacity of transducer。
Further, described electrode slice 13 includes electrode portion and connecting portion, and described connecting portion is affixed with described electrode portion, and described connecting portion is for being connected with power supply；Described electrode portion is the circle identical with described piezoelectric ceramic wafer 12 profile, and described electrode portion overlaps with described piezoelectric ceramic wafer 12 and stacks。
Being arranged so that piezoelectric ceramic wafer 12 is together with the whole laminated of electrode slice 13, it is to avoid when transducer input electric power is bigger, strong vibration is easily caused by high voltage arc and electrode delamination。
In the alternative of the present embodiment, four described outer masses 5 and described radial radiation housing 1 integrated molding。
Its objective is to avoid formation contact surface between cross orthogonal composite sandwich formula piezoelectric excitation source and radial radiation housing 1, effectively prevent ultrasonic energy transmission loss between contact surface。
Such as Fig. 1, in the alternative of the present embodiment, described radial radiation housing 1 two ends have also been respectively and fixedly connected with waterproof sealing lid 14。
Prevent dust, moisture etc. from entering, cause short circuit etc.。
Further, two described waterproof sealing lids 14 are connected by screw with described radial radiation housing 1。
The mode that screw connects is relatively simple, easy to process。
Further, it is respectively arranged with sealing ring between two described waterproof sealing lids and described radial radiation housing 1。
Improve sealing characteristics further, it is prevented that the entrance of dust and moisture。
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme。
Claims (10)
1. the cross orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that include cross orthogonal composite sandwich formula piezoelectric excitation source and cylindric radial radiation housing；Described radial radiation housing is sleeved on outside described cross orthogonal composite sandwich formula piezoelectric excitation source；
Described cross orthogonal composite sandwich formula piezoelectric excitation source includes taper prestressing force elastic expansion structure, cross orthogonal complex centre mass, outer mass that piezoelectric ceramics crystalline substance heap that four groups of structures are identical is identical with four shapes；
Described cross orthogonal complex centre mass includes four block-shaped identical composition portions, and four pieces of described composition portion centrosymmetry are placed；Described in four groups, piezoelectric ceramics crystalline substance heap is placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass；Four described outer masses are placed around the central shaft centrosymmetry of described cross orthogonal complex centre mass；
The medial surface in four described composition portions surrounds a cylindrical hole and two identical bellmouths；The small end of two described bellmouths is through with described cylindrical hole respectively；
Described taper prestressing force elastic expansion structure includes fixing device and the identical expansion cone of two shapes；Two described expansion cone are inserted in two described bellmouths by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap to stack together by the piezoelectric ceramic wafer that even slice shape is identical, being mounted on metal electrode film between piezoelectric ceramic wafer described in adjacent two panels, the outside of the described piezoelectric ceramic wafer being positioned at two ends is also separately installed with described metal electrode film；Adjacent described electrode slice connects opposite polarity electrode；
The lateral surface in four described composition portions is plane, and the inner face of four described outer masses is plane；The lateral surface of described electrode slice and one of described composition portion that each described piezoelectric ceramics crystalline substance piles one end abuts, and the inner face of the described electrode slice mass outer with one of them described of the other end abuts；
The other end of four described outer masses abuts with the inwall of described radial radiation housing。
2. the tubular transducer of cross according to claim 1 orthogonal composite flooding piezoelectricity, it is characterised in that described fixing device is pre-stressed bolt, described pre-stressed bolt includes double threaded screw and two nuts, and described double threaded screw is inserted in described cylindrical hole；
Two described expansion cone are respectively arranged with centre bore, and two described expansion cone are set on described double threaded screw by described centre bore；
Two described nuts are spirally connected with the two ends of described double threaded screw respectively。
3. the tubular transducer of cross according to claim 1 orthogonal composite flooding piezoelectricity, it is characterised in that four pieces of described composition portions are sequentially connected with by four identical connectors, four described connectors are centrosymmetric placement。
4. the tubular transducer of cross according to claim 3 orthogonal composite flooding piezoelectricity, it is characterised in that described cross orthogonal complex centre mass is one-body molded。
5. the tubular transducer of cross according to claim 1 orthogonal composite flooding piezoelectricity, it is characterised in that described piezoelectric ceramic wafer is circular。
6. the tubular transducer of cross according to claim 5 orthogonal composite flooding piezoelectricity, it is characterised in that described electrode slice includes electrode portion and connecting portion, described connecting portion is affixed with described electrode portion, and described connecting portion is for being connected with power supply；Described electrode portion is the circle identical with described piezoelectric ceramic wafer profile, and described electrode portion overlaps with described piezoelectric ceramic wafer and stacks。
7. the tubular transducer of cross according to claim 1 orthogonal composite flooding piezoelectricity, it is characterised in that four described outer masses and described radial radiation housing integrated molding。
8. the cross orthogonal composite flooding tubular transducer of piezoelectricity according to any one of claim 1-7, it is characterised in that described radial radiation housing two ends have also been respectively and fixedly connected with waterproof sealing lid。
9. the tubular transducer of cross according to claim 8 orthogonal composite flooding piezoelectricity, it is characterised in that two described waterproof sealing lids are connected by screw with described radial radiation housing。
10. the tubular transducer of cross according to claim 9 orthogonal composite flooding piezoelectricity, it is characterised in that be respectively arranged with sealing ring between two described waterproof sealing lids and described radial radiation housing。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610163649.4A CN105689248B (en) | 2016-03-22 | 2016-03-22 | The orthogonal tubular energy converter of composite drive piezoelectricity of cross |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610163649.4A CN105689248B (en) | 2016-03-22 | 2016-03-22 | The orthogonal tubular energy converter of composite drive piezoelectricity of cross |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105689248A true CN105689248A (en) | 2016-06-22 |
| CN105689248B CN105689248B (en) | 2018-06-26 |
Family
ID=56232378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610163649.4A Active CN105689248B (en) | 2016-03-22 | 2016-03-22 | The orthogonal tubular energy converter of composite drive piezoelectricity of cross |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105689248B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755230A (en) * | 2017-11-16 | 2018-03-06 | 中国计量大学 | The controllable high power altrasonic transducer of sound field |
| CN113134467A (en) * | 2020-01-20 | 2021-07-20 | 中国科学院声学研究所 | Star-shaped broadband communication transducer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0485261A1 (en) * | 1990-11-06 | 1992-05-13 | Schlumberger Limited | Downhole acoustic transducer |
| US5548175A (en) * | 1989-06-05 | 1996-08-20 | Canon Kabushiki Kaisha | Vibration driven motor |
| CN101090243A (en) * | 2007-04-30 | 2007-12-19 | 哈尔滨工业大学 | Spherical multi-freedom altrasonic electric machine of single vibrator longtitude bend sandwich changer type |
| CN101090244A (en) * | 2007-04-30 | 2007-12-19 | 哈尔滨工业大学 | Plane multi-freedom altrasonic electric machine of single vibrator longtitude bend sandwich changer type |
| CN101262187A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Bending vibration sandwich energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101626207A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type rotary ultrasonic motor using bending vibration modes |
| CN205599472U (en) * | 2016-03-22 | 2016-09-28 | 许龙 | Tubular transducer of cross quadrature combined drive piezoelectricity |
-
2016
- 2016-03-22 CN CN201610163649.4A patent/CN105689248B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548175A (en) * | 1989-06-05 | 1996-08-20 | Canon Kabushiki Kaisha | Vibration driven motor |
| EP0485261A1 (en) * | 1990-11-06 | 1992-05-13 | Schlumberger Limited | Downhole acoustic transducer |
| CN101090243A (en) * | 2007-04-30 | 2007-12-19 | 哈尔滨工业大学 | Spherical multi-freedom altrasonic electric machine of single vibrator longtitude bend sandwich changer type |
| CN101090244A (en) * | 2007-04-30 | 2007-12-19 | 哈尔滨工业大学 | Plane multi-freedom altrasonic electric machine of single vibrator longtitude bend sandwich changer type |
| CN101262187A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Bending vibration sandwich energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101626207A (en) * | 2009-08-19 | 2010-01-13 | 哈尔滨工业大学 | Vibrator of beam type rotary ultrasonic motor using bending vibration modes |
| CN205599472U (en) * | 2016-03-22 | 2016-09-28 | 许龙 | Tubular transducer of cross quadrature combined drive piezoelectricity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755230A (en) * | 2017-11-16 | 2018-03-06 | 中国计量大学 | The controllable high power altrasonic transducer of sound field |
| CN113134467A (en) * | 2020-01-20 | 2021-07-20 | 中国科学院声学研究所 | Star-shaped broadband communication transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105689248B (en) | 2018-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105728306A (en) | Cross-shaped orthogonal compound drive piezoelectric tubular transducer | |
| CN101121165B (en) | Piezoelectric ultrasonic transducer | |
| CN102527628B (en) | High-power dumbbell rod type tubular longitudinal-radial compound vibration ultrasonic irradiator | |
| CN201410461Y (en) | Circular tube type piezoelectricity ultrasound energy converter | |
| CN102843063B (en) | Screw-thread-driven rotary-linear ultrasonic motor using columnar stator high-order bending vibration mode | |
| US11389832B2 (en) | Low-profile, low-frequency, and low-impedance broad-band ultrasound transducer and methods thereof | |
| CN205599472U (en) | Tubular transducer of cross quadrature combined drive piezoelectricity | |
| CN101650937A (en) | Large power composite ultraphonic pipe | |
| EP3225171A1 (en) | Ultrasonic driving structure with integrated pzt transducer and amplitude transformer | |
| US10702889B2 (en) | Modular, submersible ultrasonic tubular transducer | |
| CN101093667A (en) | Dish type transmitting transducer | |
| CN105689248A (en) | Cross-shaped orthogonal compound drive piezoelectric pipe-shaped transducer | |
| CN102682756A (en) | Ultralow-frequency flexual-tensional underwater acoustic transducer | |
| CN101758017B (en) | Omnidirectional ultrasonic radiator | |
| CN107755230A (en) | The controllable high power altrasonic transducer of sound field | |
| Jia et al. | Study on tangentially polarized composite cylindrical piezoelectric transducer with high electro-mechanical coupling coefficient | |
| CN202715536U (en) | High-power dumbbell rod and tube type longitudinal and radial composite vibration ultrasonic radiator | |
| CN107509149A (en) | A kind of small size large amplitude helical spring low-frequency transducer | |
| CN205599473U (en) | Tubular transducer of cross quadrature combined drive piezoelectricity | |
| SE470246B (en) | Electroacoustic transducer comprising a sealed capsule | |
| CN107737709B (en) | Double-excitation two-dimensional longitudinal coupling vibration sandwich type piezoelectric ultrasonic transducer | |
| JP2011244133A (en) | Acoustic transducer | |
| CN100537019C (en) | Energy conversion method and device for ultrasonic liquid processing | |
| CN205833583U (en) | The tubular transducer of composite flooding piezoelectric supersonic | |
| CN207823358U (en) | The controllable high power altrasonic transducer of sound field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181011 Address after: 310018 No. 258, Xue Yuan Street, Xiasha Higher Education Park, Jianggan District, Hangzhou, Zhejiang. Patentee after: CHINA JILIANG UNIVERSITY Address before: 315400 No. 258, Xue Yuan Street, Xiasha Higher Education Park, Hangzhou, Zhejiang Patentee before: Xu Long |