CN205599473U - Tubular transducer of cross quadrature combined drive piezoelectricity - Google Patents
Tubular transducer of cross quadrature combined drive piezoelectricity Download PDFInfo
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- CN205599473U CN205599473U CN201620222672.1U CN201620222672U CN205599473U CN 205599473 U CN205599473 U CN 205599473U CN 201620222672 U CN201620222672 U CN 201620222672U CN 205599473 U CN205599473 U CN 205599473U
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Abstract
The utility model provides a tubular transducer of cross quadrature combined drive piezoelectricity relates to the ultrasonic transducer field, including radially radiating casing, toper prestressing force elastic expansion structure, cross quadrature recombination center quality piece and the brilliant heap of four piezoceramics of group, the centroplasm gage block includes four block group one -tenth portions, the medial surface of constitution portion encloses into a cylinder hole and two bell mouths, the expansion structure includes fixing device and two toper inflation bodies, inflation body cartridge is in the bell mouth, piezoceramics is brilliant to be piled to be stacked by electrode slice and even number piece piezoceramics wafer and forms, the electrode slice of inlayer and the lateral surface butt of component portion, outer electrode slice and radially radiate the inner wall butt of casing. This application has been solved the ultrasonic transducer among the prior art and has been had sound field " blind area " and " standing wave characteristic ", the radial more weak technical problem of supersound radiation intensity.
Description
Technical field
This utility model relates to ultrasonic transducer field, especially relates to a kind of cross orthogonal composite flooding piezo tube
Shape transducer.
Background technology
The function of ultrasonic transducer is the electrical power of input to be converted into 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.Should
Transducer, by French scientist Langevin utility model, has that simple in construction, power capacity be relatively big and electromechanical conversion efficiency
Advantages of higher.Along with development and the extensive application of ultrasonic technique of science and technology, ultrasonic in many new technical field (such as ultrasonic medium-height grass
Medicine extraction, ultrasonic sewage disposal, ultrasonic oil-production and sonochemistry reaction etc.) obtain important application.
In these new technical field, radiant power and acoustic wave action scope to ultrasonic transducer propose higher wanting
Ask: high-power, high efficiency and all-directional ultrasonic radiation.For existing sandwich extensional vibration piezoelectric ultrasonic transducer, due to
The theory of himself and the restriction of structure, single sandwich extensional vibration piezoelectric ultrasonic transducer also exist limited power capacity,
The weak points such as ultrasonication direction is single, ultrasonic radiation limited area, therefore, it is difficult to meet in new ultrasonic technique required
The characteristic of high-power, all-directional ultrasonic radiation.At present, in order to improve single sandwich extensional vibration piezoelectric ultrasonic transducer
Weak point, grown up following a few class ultrasonic transducer.
(1) arrayed ultrasonic transducer.By in the bonding one or more columns per page sandwich extensional vibration of container bottom or surrounding
Piezoelectric ultrasonic transducer composition array sound source radiative acoustic wave in liquid.Change although array sound source can solve single sandwich
Can the ultrasonication area that exists of device and the weak point such as quantity of power is limited and acoustic irradiation direction is single, but owing to longitudinally changing
Can device oscillator radiating surface be plane, its radiated sound field directivity be strong, is usually present sound field " blind area ", and this is also to restrict such transducing
" bottleneck " of device liquid ultrasonic treatment usefulness.
(2) push-pull transducer.Its operation principle is by two sandwiches being coupling in metal circular tube two ends
The compressional vibration of Longitudinal Piezoelectric Transducer, produces longitudinal push-and-pull action and radially produces radiating acoustic energy at pipe pipe.From push-
From the point of view of the physical dimension of pull transducer and acoustic irradiation characteristic, the vibration of such transducer belongs to sandwich longitudinal direction piezoelectric energy-conversion
The high-order longitudinal vibration of the compressional vibration excitation metal circular tube of device, produces due to poisson effect under the high-order longitudinal vibration mode of pipe
Raw Radial Coupling vibration.Therefore, although such transducer can solve single sandwich extensional vibration piezoelectric ultrasonic transducer and exist
The weak point such as single, the ultrasonic radiation limited area in ultrasonication direction, but due to such transducer operationally system
The master direction that shakes still in longitudinal direction, there is the Radial Coupling produced by poisson effect and vibrate relatively weak and radial ultrasonic radiant intensity
The most weak weak point.Additionally, due to metal circular tube works in high-order longitudinal vibration mode, its radiated sound field is more apparent along longitudinally having
" stationary wave characteristic ".
Based on this, it is above-mentioned to solve that this utility model provides a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity
Technical problem.
Utility model content
The purpose of this utility model is to provide a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity, existing to solve
With the presence of the arrayed ultrasonic transducer sound field " blind area " in technology, and push-pull transducer radial ultrasonic radiant intensity is relatively
Longitudinally there is the technical problem of significantly " stationary wave characteristic " on weak, radiated sound field edge.
A kind of cross orthogonal composite flooding tubular transducer of piezoelectricity is provided in embodiment of the present utility model, described
The cross orthogonal composite flooding tubular transducer of piezoelectricity
Including cross orthogonal composite sandwich formula piezoelectric excitation source and cylindric radial radiation housing；Described radial radiation shell
Body is sleeved on outside described cross orthogonal composite sandwich formula piezoelectric excitation source；
Described cross orthogonal composite sandwich formula piezoelectric excitation source includes that taper prestressing force elastic expansion structure, cross are orthogonal
Complex centre mass and the identical piezoelectric ceramics crystalline substance heap of four groups of structures；
Described cross orthogonal complex centre mass includes four block-shaped identical composition portions, in four pieces of described composition portions
The heart is symmetrically placed；Described in four groups, piezoelectric ceramics crystalline substance heap is around the central shaft center pair of described cross orthogonal complex centre mass
Claim to place；
The medial surface in four described composition portions surrounds a cylindrical hole and two identical bellmouths；Two described bellmouths
Small end through with described cylindrical hole respectively；
Described taper prestressing force elastic expansion structure includes the expansion cone that fixing device is identical with two shapes；Two
Described expansion cone is inserted in two described bellmouths by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap to be stacked together by the piezoelectric ceramic wafer that even slice shape is identical, adjacent two
Being mounted on metal electrode film described in sheet between piezoelectric ceramic wafer, the outside of the described piezoelectric ceramic wafer being positioned at two ends is also divided
Described metal electrode film is not installed；Adjacent described electrode slice connects opposite polarity electrode；
The lateral surface in four described composition portions is plane；The described electrode slice of each described piezoelectric ceramics crystalline substance heap one end with
The lateral surface in one of described composition portion abuts, and the described electrode slice of the other end supports with the inwall of described radial radiation housing
Connect.
Optionally, described fixing device is pre-stressed bolt, and described pre-stressed bolt includes double threaded screw and two nuts,
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 divided by described centre bore
It is not sleeved on described double threaded screw；
Two described nuts two ends with described double threaded screw respectively are spirally connected.
Optionally, four pieces of described composition portions are sequentially connected with by four identical connectors, four described connectors in
The heart is symmetrically placed.
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, described company
The portion that connects is for being connected with power supply；The lateral surface in the electrode portion being positioned at the described electrode slice of outermost end is cambered surface, with described radial spoke
The inwall penetrating housing abuts.
Optionally, the electrode portion of remaining described electrode slice is the circular piece identical with described piezoelectric ceramic wafer profile,
Described electrode portion overlaps with described piezoelectric ceramic wafer and stacks.
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 orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, divides according to its vibration mode
For two types: 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 orthogonal composite sandwich formula piezoelectricity of the cross within transducer swashs
Encouraging source design to work under orthogonal longitudinal resonance mode, switch on power, the frequency of regulation power supply and matching condition, when swashing of power supply
Encourage the longitudinal resonance frequencies one of the corresponding order in frequency composite sandwich orthogonal to the cross within transducer formula piezoelectric excitation source
During cause, cross orthogonal composite sandwich formula piezoelectric excitation source is by the alternation extensional vibration expanding along its orthogonal direction and shrink also
Radial radiation housing is directly driven to make to be forced to complex vibration, thus to the radial radiation sound wave of radiation housing.
Compound for simultaneous resonance, its operation principle is that the orthogonal composite sandwich formula piezoelectricity of the cross within transducer swashs
The radial direction resonant frequency with its external radiation housing of the orthogonal longitudinal resonance frequencies design encouraging source is identical.Switch on power, regulation
The frequency of power supply and matching condition, when the driving frequency of power supply composite sandwich orthogonal with the cross within transducer formula piezoelectricity swashs
When the radial direction resonant frequency of the radiation housing encouraging the longitudinal resonance frequencies in source and outside is consistent, the internal orthogonal compound folder of cross
The extensional vibration in core type piezoelectric excitation source excites the radial vibration of external radiation housing along the radial direction radiating housing, thus real
Vertical footpath between existing inside and outside two parts is combined simultaneous resonance the radial radiation sound wave to radiation housing.
Piezoelectric ceramics has the following characteristics that when voltage acts on piezoelectric ceramics, will produce with the change of voltage and frequency
Raw mechanically deform.On the other hand, when piezoelectric ceramics is deformed by the effect of external force, its two comparative electrode faces produce
Positive and negative contrary electric charge.Utilize this principle, just piezoelectric ceramics can be used as ultrasonic transducer.
The described cross orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, utilizes the spy of piezoelectric ceramics
Point, produces ultrasound wave.Insert bellmouth by expansion cone, make four described composition portion outward expansion at center, press
One outside prestressing force of electroceramics wafer.And outside give under the effect of radial radiation housing piezoelectric ceramic wafer one to
Interior prestressing force.The cross being so equivalent to define similar two groups of traditional sandwich piezoelectric transducer is orthogonal compound.Taper
The degree of depth that expander inserts determines prestressed size.Excessive prestressing force makes piezoelectric ceramic wafer press the tightest, thus presses down
Make its vibration.Too small prestressing force easily makes piezoelectric ceramic wafer press get Tai Song, excesssive gap, is easily shattered.So that
One suitable prestressing force scope, i.e. suitably insertion depth, this insertion depth is true by mathematical calculation when designing and experiment
Fixed, the application difference by insertion depth, it is achieved prestressing force is adjustable, it is adaptable to different situations, it is adjustable to the most pre-
Stress.
The described cross orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, overall structure is center pair
Claim, very uniform to ambient radiation ultrasound wave, there is not sound field " blind area ", by four groups of piezoelectric ceramics crystalline substance heaps, produce ultrasound wave, profit
Drive the radial vibration of tubular radial radiation housing with the extensional vibration of piezoelectric ceramics crystalline substance heap, utilize tradition sandwich piezoelectricity to change
The energy simple in construction of device, the advantage that power capacity is big, reached the structure of the improvement tubular transducer of existing radial compound and carried
The purpose of its power capacity high, radial ultrasonic radiant intensity is relatively strong, there is not longitudinal " stationary wave characteristic ".
Use taper prestressing force elastic expansion structure, collaborative outer tubular housing that four groups of internal piezoelectric ceramics crystalline substance heaps are executed
Add inside and outside two-way prestressing force, the power density of tubular transducer is greatly improved.Meanwhile, expanding prestressing mechanism also strengthens
The radial rigidity of this orthogonal tubular transducer of composite flooding piezoelectricity.It is allowed to apply also for High Voltage environment, as deep-well
In oil recovery acoustic emission transducer, deep-sea, underwater sound transmitting transducer etc., have expanded its range of application.Additionally, due to the application's is interior
The prestressing force of the piezoelectric ceramics crystalline substance heap in portion is to be worked in coordination with outer tubular housing by taper prestressing force elastic expansion structure to apply, thus saves
Remove the center pre-stressed bolt of traditional sandwich piezoelectric transducer, therefore its stack of piezo crystals can use whole piece piezoelectric ceramic wafer
Replace traditional piezoelectric ring used by sandwich piezoelectric transducer.Therefore, the application uses the piezo crystals that ceramic wafers forms
The piezoelectric ceramics crystalline substance heap that heap is made up of annular piezoelectric ceramic wafer than traditional sandwich piezoelectric transducer has bigger
Volume, thus further increase the power capacity of transducer, power is the biggest, and radial ultrasonic radiant intensity is the strongest, the most not
There is longitudinal " stationary wave characteristic ".
Based on this, the application utilizes the extensional vibration of piezoelectric ceramics crystalline substance heap to drive the radial direction of tubular radial radiation housing to shake
Dynamic, it is achieved the high power work of transducer and radially comprehensive acoustic irradiation, there is not sound field " blind area " and longitudinal " standing wave spy
Property ".The advantage 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 wide
General it is applied to ultrasonic oil-production, underwater sound transmitting transducer, ultrasonic cleaning, supersound extraction, ultrasonic emulsification, Ultrasonic Pulverization and sonochemistry
The technical fields such as liquid handling.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right
In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it is clear that, describe below
In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of 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 front view of embodiment piezoelectric ceramics crystalline substance heap.
Reference:
1-radial radiation housing；2-taper prestressing force bullet 3-cross orthogonal compound in
Property expansion structure；Heart mass；
4-piezoelectric ceramics crystalline substance heap；5-combination section；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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described
Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this
The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality
Novel protected scope.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only
Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fixing connection, it is also possible to be to removably connect, or integrally
Connect；Can be to be mechanically connected, it is also possible to be that electric welding connects；Can be to be joined directly together, it is also possible to by the indirect phase of intermediary
Even, can be the connection of two element internals.For the ordinary skill in the art, can understand above-mentioned with concrete condition
Term concrete meaning in this utility model.
Embodiment
As shown in figs. 1-7, a kind of cross orthogonal composite flooding tubular transducer of piezoelectricity, institute are provided in the present embodiment
State the cross orthogonal composite flooding tubular transducer of piezoelectricity and include cross orthogonal composite sandwich formula piezoelectric excitation source and cylindrical shape
Radial radiation housing 1；Described radial radiation housing 1 is sleeved on outside described cross orthogonal composite sandwich formula piezoelectric excitation source；
Described cross orthogonal composite sandwich formula piezoelectric excitation source is just including taper prestressing force elastic expansion structure 2, cross
Hand over the complex centre mass 3 piezoelectric ceramics crystalline substance heap 4 identical with four groups of structures；
Described cross orthogonal complex centre mass 3 includes four block-shaped identical composition portions 5, four pieces of described composition portions
5 centrosymmetry are placed；Piezoelectric ceramics crystalline substance heap 4 described in four groups is around the central shaft of described cross orthogonal complex centre mass 3
Centrosymmetry is placed；
The medial surface in four described composition portions 5 surrounds cylindrical hole 6 bellmouth identical with two 7；Two described cones
The small end in shape hole 7 is through with described cylindrical hole 6 respectively；
Described taper prestressing force elastic expansion structure 2 includes the expansion cone 8 that fixing device is identical with two shapes；Two
Individual described expansion cone 8 is inserted in two described bellmouths 7 by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap 4 to be stacked together by the piezoelectric ceramic wafer 12 that even slice shape is identical, adjacent
Two panels described in be mounted on metal electrode film 13 between piezoelectric ceramic wafer 12, be positioned at the described piezoelectric ceramic wafer 12 at two ends
Outside be also separately installed with described metal electrode film 13；Adjacent described electrode slice 13 connects opposite polarity electrode；For side
Just understand, in the present embodiment, often to organize as a example by piezoelectric ceramics crystalline substance heap 4 includes four disc piezoelectric ceramic wafers, in figure point
It is not designated as 12a, 12b, 12c and 12d.Between adjacent two panels piezoelectric ceramic wafer and the outside of piezoelectric ceramic wafer 12a, 12d
It 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
With the negative pole that 13e connects power supply, electrode slice 13b and 13d connects positive source.
The lateral surface in four described composition portions 5 is plane；The described electrode slice of each described piezoelectric ceramics crystalline substance heap one end
(13a) lateral surface with one of described composition portion 5 abuts, the described electrode slice (13e) of the other end and described radial radiation
The inwall of housing 1 abuts.
The described cross orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, divides according to its vibration mode
For two types: 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 orthogonal composite sandwich formula piezoelectricity of the cross within transducer swashs
Encouraging source design to work under orthogonal longitudinal resonance mode, switch on power, the frequency of regulation power supply and matching condition, when swashing of power supply
Encourage the longitudinal resonance frequencies one of the corresponding order in frequency composite sandwich orthogonal to the cross within transducer formula piezoelectric excitation source
During cause, cross orthogonal composite sandwich formula piezoelectric excitation source is by the alternation extensional vibration expanding along its orthogonal direction and shrink also
Radial radiation housing 1 is directly driven to make to be forced to complex vibration, thus to the radial radiation sound wave of radiation housing.
Compound for simultaneous resonance, its operation principle is that the orthogonal composite sandwich formula piezoelectricity of the cross within transducer swashs
The radial direction resonant frequency with its external radiation housing of the orthogonal longitudinal resonance frequencies design encouraging source is identical.Switch on power, regulation
The frequency of power supply and matching condition, when the driving frequency of power supply composite sandwich orthogonal with the cross within transducer formula piezoelectricity swashs
When the radial direction resonant frequency of the radiation housing encouraging the longitudinal resonance frequencies in source and outside is consistent, the internal orthogonal compound folder of cross
The extensional vibration in core type piezoelectric excitation source excites the radial vibration of external radiation housing along the radial direction radiating housing, thus real
Vertical footpath between existing inside and outside two parts is combined simultaneous resonance the radial radiation sound wave to radiation housing.
The described cross orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, utilizes the spy of piezoelectric ceramics
Point, produces ultrasound wave.Insert bellmouth 7 by expansion cone 8, make four described composition portion 5 outward expansion at center, give
12 1 outside prestressing force of piezoelectric ceramic wafer.And give piezoelectric ceramic wafer 12 under the effect of outer radial radiation housing 1
One inside prestressing force.The cross being so equivalent to define similar two groups of traditional sandwich piezoelectric transducer is orthogonal multiple
Close.The degree of depth that expansion cone 8 inserts determines prestressed size.Excessive prestressing force makes piezoelectric ceramic wafer 12 press too
Tightly, thus suppress it to vibrate.Too small prestressing force easily makes piezoelectric ceramic wafer 12 press get Tai Song, excesssive gap, is easily shaken
Broken.So that a suitable prestressing force scope, i.e. suitably insertion depth, this insertion depth is by mathematics meter when designing
Calculate and experiment determines, the application difference by insertion depth, it is achieved prestressing force is adjustable, it is adaptable to different situations, scalable
To suitable prestressing force.
The described cross orthogonal composite flooding tubular transducer of piezoelectricity that this utility model provides, overall structure is center pair
Claim, very uniform to ambient radiation ultrasound wave, there is not sound field " blind area ", by four groups of piezoelectric ceramics crystalline substance heaps 4, produce ultrasound wave,
The extensional vibration utilizing piezoelectric ceramics crystalline substance heap 4 drives the radial vibration of tubular radial radiation housing 1, utilizes tradition sandwich pressure
The advantage that the simple in construction of electric transducer, power capacity are big, has reached the structure of the improvement tubular transducer of existing radial compound
With the purpose of its power capacity of raising, radial ultrasonic radiant intensity is relatively strong, there is not longitudinal " stationary wave characteristic ".
Using taper prestressing force elastic expansion structure 2, collaborative outer tubular housing is to four groups of internal piezoelectric ceramics crystalline substance heaps 4
Apply inside and outside two-way prestressing force, the power density of tubular transducer is greatly improved.Meanwhile, expanding prestressing mechanism also increases
The strong radial rigidity of this orthogonal tubular transducer of composite flooding piezoelectricity, improves the body vibration performance of whole transducer.Make
Apply also for High Voltage environment, as underwater sound transmitting transducer in deep-well oil-extraction acoustic emission transducer, deep-sea etc., expand
Its range of application.Additionally, due to the prestressing force of the piezoelectric ceramics crystalline substance heap 4 of the inside of the application is swollen by taper prestressing force elasticity
Swollen structure 2 is worked in coordination with outer tubular housing and is applied, thus eliminates 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 stack of piezo crystals that the application uses ceramic wafers to form is made pottery by annular piezoelectricity than traditional sandwich piezoelectric transducer
The piezoelectric ceramics crystalline substance heap 4 of porcelain wafer composition has bigger volume, thus further increases the power capacity of transducer, power
The biggest, radial ultrasonic radiant intensity is the strongest, the most there is not 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 direction of tubular radial radiation housing 1
, there is not sound field " blind area " and longitudinal " standing wave in vibration, it is achieved the high power work of transducer and radially comprehensive acoustic irradiation
Characteristic ".The advantage 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
It is widely used in ultrasonic oil-production, underwater sound transmitting transducer, ultrasonic cleaning, supersound extraction, ultrasonic emulsification, Ultrasonic Pulverization and sonicating
Learn the technical fields such as liquid handling.
Such as Fig. 1-6, in the alternative of the present embodiment, described fixing device is pre-stressed bolt, described pre-stressed bolt
Including double threaded screw 9 and two nuts 10, 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 by described center
Hole 11 is set on described double threaded screw 9；
Two described nuts 10 two ends with described double threaded screw 9 respectively are spirally connected.
It is arranged such, by being rotated both clockwise and counterclockwise two of two ends described nuts 10, regulates two described tapers
Expander 8 inserts the degree of depth in two described bellmouths 7, thus the prestressing force that described piezoelectric ceramics crystalline substance heap 4 is subject to often is organized in regulation,
Simple in construction, easy to adjust.
In the alternative of the present embodiment, four pieces of described composition portions 5 are sequentially connected with by four identical connectors, four
Described connector is centrosymmetric placement.
Four described composition portions 5 are connected together, it is simple to assemble, when assembling than the composition portion 5 of four individualisms more
Add conveniently,
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 compositions
Portion 5 is separated but still in each other's thoughts, assembles easily, and processing is also convenient for.
Such as Fig. 3 and 7, 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 is pre-
Stress bolt is fixed, and under external diameter same case, the application uses stack of piezo crystals that disc piezoelectric ceramic wafer forms than biography
The piezoelectric ceramics crystalline substance heap 4 that the sandwich piezoelectric transducer of system is made up of annular piezoelectric ceramic wafer has bigger volume, from
And further increase 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, institute
State connecting portion for being connected with power supply；The lateral surface in the electrode portion being positioned at the electrode slice 13e of outermost end is cambered surface, with described radial direction
The inwall of radiation housing 1 abuts.
Being arranged such fixing more firm, transducer integral rigidity is relatively strong, and vibration performance is preferable.
Further, the electrode portion of remaining described electrode slice is the circle identical with described piezoelectric ceramic wafer profile
Sheet, described electrode portion overlaps with described piezoelectric ceramic wafer and stacks.
It is arranged so that together with piezoelectric ceramic wafer 12 laminated whole with electrode slice 13, it is to avoid when transducer inputs
When electrical power is bigger, strong vibration easily causes high voltage arc and electrode delamination.
Its objective is to avoid being formed between cross orthogonal composite sandwich formula piezoelectric excitation source and radial radiation housing 1 contact
Face, 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, prevent the entrance of dust and moisture.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of
Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment 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 described cross orthogonal composite sandwich formula
Outside piezoelectric excitation source；
Described cross orthogonal composite sandwich formula piezoelectric excitation source includes that taper prestressing force elastic expansion structure, cross are orthogonal compound
Centroplasm gauge block and the identical piezoelectric ceramics crystalline substance heap of four groups of structures；
Described cross orthogonal complex centre mass includes four block-shaped identical composition portions, center pair, four pieces of described composition portions
Claim to place；Piezoelectric ceramics crystalline substance heap described in four groups is put around the central shaft centrosymmetry of described cross orthogonal complex centre mass
Put；
The medial surface in four described composition portions surrounds a cylindrical hole and two identical bellmouths；Two described bellmouths little
Hold through with described cylindrical hole respectively；
Described taper prestressing force elastic expansion structure includes the expansion cone that fixing device is identical with two shapes；Described in two
Expansion cone is inserted in two described bellmouths by described fixing device is fixing respectively；
Often organize described piezoelectric ceramics crystalline substance heap to be stacked together by the piezoelectric ceramic wafer that even slice shape is identical, adjacent two panels institute
Stating and be mounted on metal electrode film between piezoelectric ceramic wafer, the outside of the described piezoelectric ceramic wafer being positioned at two ends is pacified the most respectively
Equipped with described metal electrode film；Adjacent described electrode slice connects opposite polarity electrode；
The lateral surface in four described composition portions is plane；The described electrode slice of each described piezoelectric ceramics crystalline substance heap one end with wherein
The lateral surface in one piece of described composition portion abuts, and the described electrode slice of the other end abuts with the inwall of described radial radiation housing.
The cross the most according to claim 1 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that 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 into described
In cylindrical hole；
Two described expansion cone are respectively arranged with centre bore, and two described expansion cone are overlapped respectively by described centre bore
It is contained on described double threaded screw；
Two described nuts two ends with described double threaded screw respectively are spirally connected.
The cross the most according to claim 1 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that described in four pieces
Composition portion is sequentially connected with by four identical connectors, and four described connectors are centrosymmetric placement.
The cross the most according to claim 3 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that described cross
Shape orthogonal complex centre mass is one-body molded.
The cross the most according to claim 1 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that described piezoelectricity
Ceramic wafers is circular.
The cross the most according to claim 5 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that described electrode
Sheet 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；It is positioned at
The lateral surface in the electrode portion of the described electrode slice of outermost end is cambered surface, abuts with the inwall of described radial radiation housing.
The cross the most according to claim 1 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that remaining institute
The electrode portion stating electrode slice is the circular piece identical with described piezoelectric ceramic wafer profile, described electrode portion and described piezoelectric ceramics
Wafer overlaps and stacks.
8. according to the cross orthogonal composite flooding tubular transducer of piezoelectricity described in 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.
The cross the most according to claim 8 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that described in two
Waterproof sealing lid is connected by screw with described radial radiation housing.
The cross the most according to claim 9 orthogonal composite flooding tubular transducer of piezoelectricity, it is characterised in that two institutes
State and be respectively arranged with sealing ring between waterproof sealing lid and described radial radiation housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620222672.1U CN205599473U (en) | 2016-03-22 | 2016-03-22 | Tubular transducer of cross quadrature combined drive piezoelectricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN105728306A (en) * | 2016-03-22 | 2016-07-06 | 中国计量学院 | Cross-shaped orthogonal compound drive piezoelectric tubular transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105728306A (en) * | 2016-03-22 | 2016-07-06 | 中国计量学院 | Cross-shaped orthogonal compound drive piezoelectric tubular transducer |
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