CN205833583U - The tubular transducer of composite flooding piezoelectric supersonic - Google Patents
The tubular transducer of composite flooding piezoelectric supersonic Download PDFInfo
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- CN205833583U CN205833583U CN201620221011.7U CN201620221011U CN205833583U CN 205833583 U CN205833583 U CN 205833583U CN 201620221011 U CN201620221011 U CN 201620221011U CN 205833583 U CN205833583 U CN 205833583U
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Abstract
This utility model provides a kind of tubular transducer of composite flooding piezoelectric supersonic, relates to field of transducer, including tubular type metal shell, prestress application device, inner vibration match block, outer end vibration match block and stack of piezo crystals；Stack of piezo crystals is not less than three groups, including odd number sheet metal electrode film and even slice piezoelectric ceramic wafer；Metal electrode film and piezoelectric ceramic wafer interval stack；Adjacent electrode slice connects opposite polarity electrode；Prestress application device includes central supported block and screw rod；The column-shaped projection identical with the quantity of stack of piezo crystals it is provided with on the periphery of central supported block；Each column-shaped projection is provided with plug-in opening；Inner vibration match block one end is provided with screwed hole；One end of the other end and one group of stack of piezo crystals abuts；Vibration match block one end, outer end is affixed with housing；The other end is affixed with the stack of piezo crystals other end；Screw rod one end is stretched in plug-in opening, the other end and screw hole.Present application addresses the technical problems such as existing transducer power is little.
Description
Technical field
This utility model relates to field of transducer, especially relates to a kind of tubular transducer of composite flooding piezoelectric supersonic.
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.
Along with constantly bringing forth new ideas of ultrasonic technique, improving constantly of application level, power ultrasonic is defended in industrial and agricultural production, medical treatment
The fields such as life, bio-pharmaceuticals and food processing obtain a wide range of applications.Ultrasonic transducer is as the core of ultrasound processing equipment
Heart parts, the quality of its performance directly decides the application effect of power ultrasonic.
At present, in ultrasound processing equipment, widely used transducer is extensional vibration sandwich piezoelectric transducer.This
It is because the simple in construction of this type of transducer, stable performance, and has that power capacity is big and electromechanical conversion efficiency advantages of higher.Can
It is that, along with the development of new high-tech industry, environment for human survival quality and the raising of material requirement, produce and live institute
Power ultrasonic processing equipment the power capacity of its transducer, acoustic radiation efficiency, acoustic wave action scope etc. are proposed higher
Requirement.Single extensional vibration sandwich piezoelectric ultrasonic transducer is owing to limited power capacity, acoustic radiation area are little, acoustic wave action
Direction is single waits deficiency, can not meet existing large power supersonic at the needs produced and in life.
Applying relatively small number of another kind of transducer in ultrasound processing equipment is radial vibration sandwich transducer, and this type of changes
Can device be by the method for heat expansion and cold contraction, piezoelectric ceramic tube to be embedded in metal tube, and utilize this principle to piezoelectric ceramic circular tube apply by
Unidirectional radial direction prestressing force outside to inside.The swept area of radial vibration sandwich transducer is relatively big, and the sound wave of generation can realize
Omnidirectional radiation along radius space.But, the prestressing force size applied by expanding with heat and contract with cold is difficult to control, and prestressing force is bigger
Piezoelectric ceramic tube will be caused to crush, and the power capacity of the less transducer of prestressing force will not reach the performance required by transducer, and
When transducer input electric power is bigger, strong vibration easily causes high voltage arc and electrode delamination, so this type of transducer exists
Application in producing and living is relatively fewer.
Based on this, this utility model provides a kind of tubular transducer of composite flooding piezoelectric supersonic and surpasses to solve above two
The technical problem of acoustic wave transducer.
Utility model content
The purpose of this utility model is to provide a kind of tubular transducer of composite flooding piezoelectric supersonic, to solve prior art
In extensional vibration sandwich piezoelectric ultrasonic transducer owing to limited power capacity, acoustic radiation area are little, acoustic wave action direction is single
One, and prestressing force suffered by radial vibration sandwich transducer piezoelectric ceramic tube is wayward, the caducous technical problem of electrode.
A kind of tubular transducer of composite flooding piezoelectric supersonic, described combination flooding is provided in embodiment of the present utility model
The dynamic pressure ultrasonic tubular transducer of electricity includes tubular type metal shell, prestress application device, inner vibration match block, outer end vibration
Match block and stack of piezo crystals；Described prestress application device, described inner vibration match block, described outer end vibration match block and institute
State stack of piezo crystals and be positioned at described metal shell；The two ends of described metal shell are connected with metal cover board；
Described stack of piezo crystals is not less than three groups；Often organize described stack of piezo crystals and all include metal electrode film and idol described in odd number sheet
Several pieces piezoelectric ceramic wafers；All of described piezoelectric ceramic wafer overlap is placed；Piezoelectric ceramic wafer described in adjacent two panels it
Between all clamped a described metal electrode film, the outside of the described piezoelectric ceramic wafer being positioned at two ends is placed with one the most respectively
Described metal electrode film；Adjacent described electrode slice connects opposite polarity electrode by connecting line respectively；
Described prestress application device includes central supported block and screw rod；Described central supported block is cylindrical；Described center
Prop up and be provided with the column-shaped projection identical with the quantity of described stack of piezo crystals on the periphery of bracer；All of described column-shaped projection edge
The circumference of described central support posts is uniformly distributed；The center, top of each described column-shaped projection is provided with plug-in opening；
The quantity of described inner vibration match block and the quantity of described outer end vibration match block all with described stack of piezo crystals
Quantity identical；Described inner vibration match block is cylindrical；The center of described inner vibration match block one end is provided with screw thread
Hole；The other end of described inner vibration match block and one end abutting of stack of piezo crystals described in a group；Described outer end vibration match block
One end affixed with the inwall of described metal shell；Another of the other end and the described stack of piezo crystals of described outer end vibration match block
End abuts.
The quantity of described screw rod is identical with the quantity of described stack of piezo crystals；One end of every described screw rod is respectively protruding into one
In described plug-in opening, the other end respectively with a described screw hole.
Optionally, described piezoelectric ceramic wafer is circular.
Optionally, described metal electrode film includes electrode portion and connecting portion, and described connecting portion is affixed with described electrode portion, institute
State connecting portion for being connected with electrode；Described electrode portion is the circular piece identical with described piezoelectric ceramic wafer external diameter, described electricity
Pole portion overlaps with described piezoelectric ceramic wafer and stacks.
Optionally, described inner vibration match block is cylinder, and two ends are plane；Outside described inner vibration match block
Footpath is identical with the external diameter of described piezoelectric ceramic wafer；Described the inner vibrates one end and the institute that match block abuts with described stack of piezo crystals
The electrode portion overlap stating electrode slice is placed.
Optionally, described outer end vibration match block is cylinder, the external diameter of described outer end vibration match block and described piezoelectricity
The external diameter of ceramic wafers is identical；One end that described outer end vibration match block abuts with described stack of piezo crystals is planar ends, described flat
Face end is overlapping with the described electrode portion of the described stack of piezo crystals of abutting to be placed.
Optionally, the center of one of them described metal cover board is provided with through wires hole, and described connecting line is by described threading
Pass described metal cover board at hole to be connected with electrode.
Optionally, two described metal cover boards are splayed cover plate.
Optionally, the middle part of described screw rod is provided with hexagonal screw head.
Optionally, it is provided with female thread in described plug-in opening；The hand of spiral of described female thread and the spiral shell of described screwed hole
Revolving in opposite direction, described screw rod is double threaded screw, and described screw rod is spirally connected with plug-in opening.
Optionally, vibration match block in described outer end is one-body molded with described metal shell.
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.This utility model provides
The described tubular transducer of composite flooding piezoelectric supersonic is exactly the feature that make use of piezoelectric ceramic wafer, is made pottery to piezoelectricity by electrode slice
Porcelain wafer is energized, thus creates supersonic vibration.
The described tubular transducer of composite flooding piezoelectric supersonic that this utility model provides, by often organizing stack of piezo crystals both sides
Inner vibration match block and outer end vibration match block provide prestressing force to often group stack of piezo crystals, is uniformly distributed circumferentially by many groups
The extensional vibration of stack of piezo crystals is converted into the radial vibration of the metal shell driving tubular type, simplifies existing radial vibration sandwich
The labyrinth of formula transducer, also improves its power capacity and acoustic radiation efficiency.
Use prestress application device, by rotary screw, change between the inner vibration match block and central supported block away from
From, collaborative outer end vibration match block block and metal shell apply sufficiently large prestressing force, the most not only to many group stack of piezo crystals
The power capacity of transducer is greatly improved, and enhances the radial rigidity of transducer.Simultaneously facilitate regulation control, Bu Huiyin
Prestressing force is excessive damages piezoelectric ceramic wafer by pressure, and the power capacity that also will not cause whole stack of piezo crystals because prestressing force is too small is less,
Can not meet demand.
Metal shell, while radial vibration, drives metal cover board to do extensional vibration, thus realizes what transducer produced
Sound wave is radiation the comprehensive of free space, further improves the radiation efficiency of transducer.
This device is connected traditional sandwich piezoelectric transducer of porpoise match block with by center bolt to be had the most very much not
With, fix piezoelectric ring not against bolt, but its stack of piezo crystals replaced the piezoelectric chip of annular by whole piece piezoelectric chip,
Work in coordination with fixing by the inner vibration match block, outer end vibration match block.Owing to the piezoelectric ring that piezoelectric patches is more traditional has bigger
Volume, so further increasing the power capacity of transducer.And, use electrode slice to do electrode and by the inner vibration
Join block, outer end vibration match block choking tightly, it is not easy to come off.
Based on this, this utility model, than original technology, has power capacity big, and acoustic irradiation area is big, it is possible to Quan Fang
Position radiation, the prestressing force that stack of piezo crystals is subject to is easy to regulation, and the advantage of electrode difficult drop-off.
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 embodiment composite flooding piezoelectric supersonic tubular transducer front view；
Fig. 2 is embodiment composite flooding piezoelectric supersonic tubular transducer top view；
Fig. 3 is that the embodiment tubular transducer of composite flooding piezoelectric supersonic is bowed sectional view；
Fig. 4 is stack of piezo crystals structural representation；
Fig. 5 is stack of piezo crystals side view.
Reference:
1-metal shell；2-the inner vibration match block；3-outer end vibration match block；
4-stack of piezo crystals；5-metal cover board；6-central supported block；
7-screw rod；8-column-shaped projection；9-plug-in opening；
10-screwed hole；11-through wires hole；12-hexagonal screw head；
13-piezoelectric ceramic wafer；14-electrode portion；15-connecting portion.
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 Figure 1-5, provide a kind of tubular transducer of composite flooding piezoelectric supersonic in the present embodiment, described compound
Piezoelectricity ultraphonic pipe shape transducer is driven to include tubular type metal shell 1, central supported block 6, screw rod 7, three inner vibration coupling
2, three outer end vibration match block 3 of block and three groups of stack of piezo crystals 4；Central supported block 6, screw rod 7, described inner vibration match block 2,
Described outer end vibration match block 3 and described stack of piezo crystals 4 are positioned at described metal shell 1；The two ends of described metal shell 1 are affixed
There is metal cover board 5；Central supported block 6, screw rod 7, described inner vibration match block 2, described outer end vibration match block 3 all use gold
Belong to material, it is provided that stronger stress, there is stronger rigidity, thus improve the power capacity of device.
Often organize described stack of piezo crystals 4 and all include metal electrode film described in odd number sheet and even slice piezoelectric ceramic wafer 13；Institute
The described piezoelectric ceramic wafer 13 having is overlapping to be placed；An institute has all been clamped between piezoelectric ceramic wafer 13 described in adjacent two panels
Stating metal electrode film, the outside of the described piezoelectric ceramic wafer 13 being positioned at two ends is placed with a described metal electrode the most respectively
Sheet；Adjacent described electrode slice connects opposite polarity electrode by connecting line respectively.
Described central supported block 6 is in cylinder；Three column-shaped projections 8 it are provided with on the periphery of described central supported block 6；
Three described column-shaped projections 8 are uniformly distributed along the circumference of described central support posts；It is uniformly distributed and can give each group of piezoelectric chip
The uniform prestressing force of heap, makes housing vibrate uniformly.The center, top of each described column-shaped projection 8 is provided with plug-in mounting
Hole 9, centrally disposed place makes active force be positioned at center, strengthens the vibration performance of whole device.
Described inner vibration match block 2 is cylindrical；The center of described inner vibration match block 2 one end is provided with screwed hole
10；The other end of described inner vibration match block 2 and one end abutting of stack of piezo crystals 4 described in a group；Described outer end vibration coupling
Block 3 is in cylinder；One end of described outer end vibration match block 3 is planar ends, and the other end is curved end, the curvature of described curved end
Identical with the curvature of described metal shell 1 inwall, described outer end vibration match block 3 is one end of curved surface and described metal shell 1
Inwall abuts；The other end of described outer end vibration match block 3 abuts with the other end of described stack of piezo crystals 4.
The quantity of described screw rod 7 is three；One end of every described screw rod 7 is respectively protruding in a described plug-in opening 9, separately
One end is spirally connected with a described screwed hole 10 respectively.That is there is an outer end vibration the both sides of three groups of stack of piezo crystals 4
Join block 3 and an inner vibration match block 2 gives its two-way prestressing force.It is all electricity owing to often organizing the outermost end of stack of piezo crystals 4
Pole piece, say, that the electrode slice of one end abuts with outer end vibration match block 3, and another electrode slice of another end is with inner
Vibration match block 2 abuts.And each inner vibration match block 2 gives its outside prestressing force with by a screw rod 7.
The described tubular transducer of composite flooding piezoelectric supersonic that this utility model provides, make use of piezoelectric ceramic wafer 13
Feature, is energized to piezoelectric ceramic wafer 13 by electrode slice, thus creates supersonic vibration.By often organizing stack of piezo crystals 4 both sides
Inner vibration match block 2 and outer end vibration match block 3 provide prestressing force to often group stack of piezo crystals 4, the most uniform by organizing more
The extensional vibration of the stack of piezo crystals 4 of distribution is converted into the radial vibration of the metal shell 1 driving tubular type, simplifies existing radial direction
The labyrinth of vibration sandwich transducer, also improves its power capacity and acoustic radiation efficiency.
Use prestress application device, by rotary screw 7, change between the inner vibration match block 2 and central supported block 6
Distance, collaborative outer end vibration match block 3 pieces and metal shell 1 apply sufficiently large pre-prestressing force to many group stack of piezo crystals 4, this
Sample is not only greatly improved the power capacity of transducer, and enhances the radial rigidity of transducer.Simultaneously facilitate regulation control
System, will not damage piezoelectric ceramic wafer 13 by pressure, also will not cause the merit of whole stack of piezo crystals 4 because prestressing force is too small because prestressing force is excessive
Rate capacity is less, can not meet demand.
Metal shell 1, while radial vibration, drives metal cover board 5 to do extensional vibration, thus realizes transducer and produce
Sound wave free space comprehensive for radiation, further improve the radiation efficiency of transducer.
This device is connected traditional sandwich piezoelectric transducer of porpoise match block with by center bolt 7 to be had the most very much not
With, fix piezoelectric ring not against bolt, but its stack of piezo crystals 4 is replaced the piezo crystals of annular by whole piece piezoelectric chip
Sheet, is choked by the inner vibration match block 2, outer end vibration match block 3 and is fixed.The piezoelectric ring more traditional due to piezoelectric patches has
Bigger volume, so further increasing the power capacity of transducer.And, use electrode slice to do electrode and by the inner
Vibration match block 2, outer end vibration match block 3 choking tightly, it is not easy to come off.
Based on this, this utility model, than original technology, has power capacity big, and acoustic irradiation area is big, it is possible to Quan Fang
Position radiation, the prestressing force that stack of piezo crystals 4 is subject to is easy to regulation, and the advantage of electrode difficult drop-off.
Such as Fig. 3-5, in the alternative of the present embodiment, described piezoelectric ceramic wafer 13 is circular.
Circular piezoelectric ceramic wafer is prone to processing, than traditional sandwich piezoelectric transducer, it is not necessary in advance should in center
Power bolt is fixed, and under external diameter same case, the application uses stack of piezo crystals 4 that ceramic wafers forms than traditional sandwich pressure
The piezoelectric ceramics crystalline substance heap that electric transducer is made up of annulus has bigger volume, thus the power further increasing transducer holds
Amount.
Further, described metal electrode film includes electrode portion 14 and connecting portion 15, described connecting portion 15 and described electrode
Portion 14 is affixed, and described connecting portion 15 is for being connected with electrode；Described electrode portion 14 is and described piezoelectric ceramic wafer 13 external diameter phase
Same circular piece, described electrode portion 14 overlaps with described piezoelectric ceramic wafer 13 and stacks.
It is arranged so that together with the whole laminated of piezoelectric ceramic wafer 13 and electrode slice, it is to avoid when transducer input electricity
When power is bigger, strong vibration easily causes high voltage arc and electrode delamination.
Further, described inner vibration match block 2 is in cylinder, and two ends are plane；Described inner vibration match block 2
External diameter identical with the external diameter of described piezoelectric ceramic wafer 13；Described inner vibration match block 2 abuts with described stack of piezo crystals 4
One end is overlapping with the electrode portion 14 of described electrode slice places.
Be arranged such so that inner vibration match block 2 give with prestressing force vertical and act on stack of piezo crystals 4 uniformly
On, prevent prestressing force from concentrating and cause piezoelectric ceramic wafer 13 to crush.
Further, described outer end vibration match block 3 is in cylinder, and the external diameter of described outer end vibration match block 3 is with described
The external diameter of piezoelectric ceramic wafer 13 is identical；One end that described outer end vibration match block 3 abuts with described stack of piezo crystals 4 is plane
End, described planar ends is overlapping with the described electrode portion 14 of the described stack of piezo crystals 4 of abutting places.The other end is curved end, with gold
Belonging to housing to abut, its radius of curvature is equal with the radius of curvature of metal shell.
Be arranged such so that outer end vibration match block 3 give with prestressing force vertical and act on stack of piezo crystals 4 uniformly
On, prevent prestressing force from concentrating and cause piezoelectric ceramic wafer 13 to crush.
Such as Fig. 1-2, in the alternative of the present embodiment, the center of one of them described metal cover board 5 is provided with threading
Hole 11, described connecting line is passed described metal cover board 5 by described through wires hole 11 and is connected with electrode.
Through wires hole 11 is set and is easy to penetrating of electric wire.
Further, two described metal cover boards 5 are splayed cover plate.The lid of remaining shape can certainly be arranged to
Plate.
Such as Fig. 3, in the alternative of the present embodiment, the middle part of described screw rod 7 is provided with hexagonal screw head 12.
The setting of hexagonal screw head 12 is easy to screw screw rod 7.
Further, it is provided with female thread in described plug-in opening 9；The hand of spiral of described female thread and described screwed hole 10
The hand of spiral contrary, described screw rod 7 is double threaded screw 7, and described screw rod 7 is spirally connected with plug-in opening 9.
The mode of double threaded screw 7 can significantly regulate prestressing force.
Or, described screw rod 7 is stepped, and the one end being spirally connected with the inner vibration match block 2 is thicker thread segment.And with
One end of central supported block 6 grafting is thinner smooth shank portions, is inserted directly in plug-in opening 9.This mode prestressing force regulation model
Enclose little, process the best.
In the alternative of the present embodiment, described outer end vibration match block 3 is one-body molded with described metal shell 1.
The relatively good processing of mode abutted, but one-body molded, its objective is to avoid outer end vibration match block 3 and metal shell
Form contact surface between 1, effectively prevent ultrasonic energy transmission loss between contact surface.
In the alternative of the present embodiment, by four groups of stack of piezo crystals 4 in cross orthogonal arrangement, stack of piezo crystals 4 is by six
The discoidal piezoelectric ceramic wafer of sheet and seven plate electrode sheets are staggered and form, and the polarization side of adjacent two piezoelectric ceramic wafers
To on the contrary.There are four protruding column-shaped projections the side of central supported block 6, and the angle of adjacent two column-shaped projections is 90 degree.
In the alternative of the present embodiment, by four groups of stack of piezo crystals 4 in cross orthogonal arrangement, stack of piezo crystals 4 is by four
The discoidal piezoelectric ceramic wafer of sheet and five plate electrode sheets are staggered and form, and the polarization side of adjacent two piezoelectric ceramic wafers
To on the contrary.There are four protruding column-shaped projections the side of central supported block 6, and the angle of adjacent two column-shaped projections is 90 degree.Its
His parts and structure thereof, connecting relation are identical with embodiment 1 or 2.
In the alternative of the present embodiment, comprising six groups of stack of piezo crystals 4, stack of piezo crystals 4 is by by four discoidal pressures
Electroceramics wafer and five plate electrode sheets are staggered and form, and the polarised direction of adjacent two piezoelectric ceramic wafers is contrary.Center
There are four protruding column-shaped projections the side propping up bracer 6, and the angle of adjacent two column-shaped projections is 60 degree.Of the present utility model
Metal shell 1, the inner vibrate match block 2, outer end vibrates match block 3, the size of central supported block 6, upper cover plate, lower cover can root
Select according to actual requirement of engineering.The sheet number of piezoelectric ceramic wafer in the group number of stack of piezo crystals 4 groups and often group stack of piezo crystals 4
Can be combined according to the requirement of power.Central supported block 6 can be arranged as required to into square, cuboid, six prismatics
Deng.
In the alternative of the present embodiment, it is respectively arranged with close between two described metal cover boards 5 and described metal shell 1
Seal.
Improve sealing characteristics further, prevent the entrance of dust and moisture.
In the alternative of the present embodiment, two described metal cover boards 5 are adopted with described metal shell 1 and are screwed.
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 tubular transducer of composite flooding piezoelectric supersonic, it is characterised in that include tubular type metal shell, prestress application
Device, inner vibration match block, outer end vibration match block and stack of piezo crystals；Described prestress application device, described inner vibration
Match block, described outer end vibration match block and described stack of piezo crystals are positioned at described metal shell；The two ends of described metal shell
It is connected with metal cover board；
Described stack of piezo crystals is not less than three groups；Often organize described stack of piezo crystals and all include metal electrode film and even slice described in odd number sheet
Piezoelectric ceramic wafer；All of described piezoelectric ceramic wafer overlap is placed；Described in adjacent two panels between piezoelectric ceramic wafer all
Having clamped a described metal electrode film, the outside of the described piezoelectric ceramic wafer being positioned at two ends is placed with described in one the most respectively
Metal electrode film；Adjacent described electrode slice connects opposite polarity electrode by connecting line respectively；
Described prestress application device includes central supported block and screw rod；Described central supported block is cylindrical；Described central supported
The column-shaped projection identical with the quantity of described stack of piezo crystals it is provided with on the periphery of block；All of described column-shaped projection is along described
The circumference of central support posts is uniformly distributed；The center, top of each described column-shaped projection is provided with plug-in opening；
The quantity of described inner vibration match block and the quantity of described outer end vibration match block all with the number of described stack of piezo crystals
Measure identical；Described inner vibration match block is cylindrical；The center of described inner vibration match block one end is provided with screwed hole；Institute
State the other end of inner vibration match block and one end abutting of stack of piezo crystals described in a group；One end of described outer end vibration match block
Affixed with the inwall of described metal shell；The other end of described outer end vibration match block supports with the other end of described stack of piezo crystals
Connect；
The quantity of described screw rod is identical with the quantity of described stack of piezo crystals；One end of every described screw rod is respectively protruding into described in one
In plug-in opening, the other end respectively with a described screw hole.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 1, it is characterised in that described piezoelectric ceramics is brilliant
Sheet is circular.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 2, it is characterised in that described metal electrode film
Including electrode portion and connecting portion, described connecting portion is affixed with described electrode portion, and described connecting portion is for being connected with electrode；Described electricity
Pole portion is the circular piece identical with described piezoelectric ceramic wafer external diameter, and described electrode portion overlaps folded with described piezoelectric ceramic wafer
Put.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 2, it is characterised in that described inner vibration
Joining block is cylinder, and two ends are plane；The external diameter of described inner vibration match block and the external diameter phase of described piezoelectric ceramic wafer
With；Described inner vibration match block is overlapping with the electrode portion of described electrode slice with one end that described stack of piezo crystals abuts places.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 4, it is characterised in that described outer end vibration
Joining block is cylinder, and the external diameter of described outer end vibration match block is identical with the external diameter of described piezoelectric ceramic wafer；Described outer end shakes
One end that dynamic match block abuts with described stack of piezo crystals is planar ends, and described planar ends is described with the described stack of piezo crystals abutted
Electrode portion overlap is placed.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 1, it is characterised in that one of them described gold
The center belonging to cover plate is provided with through wires hole, and described connecting line is passed described metal cover board with electrode even by described through wires hole
Connect.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 6, it is characterised in that two described crown caps
Plate is splayed cover plate.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 1, it is characterised in that the middle part of described screw rod
It is provided with hexagonal screw head.
The tubular transducer of composite flooding piezoelectric supersonic the most according to claim 8, it is characterised in that set in described plug-in opening
It is equipped with female thread；The hand of spiral of described female thread is contrary with the hand of spiral of described screwed hole, and described screw rod is double threaded screw,
Described screw rod is spirally connected with plug-in opening.
10. according to the tubular transducer of composite flooding piezoelectric supersonic described in any one of claim 1-5, it is characterised in that described
Outer end vibration match block is one-body molded with described metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620221011.7U CN205833583U (en) | 2016-03-22 | 2016-03-22 | The tubular transducer of composite flooding piezoelectric supersonic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620221011.7U CN205833583U (en) | 2016-03-22 | 2016-03-22 | The tubular transducer of composite flooding piezoelectric supersonic |
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| CN205833583U true CN205833583U (en) | 2016-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689249A (en) * | 2016-03-22 | 2016-06-22 | 中国计量学院 | Compound drive piezoelectric ultrasonic-pipe-shaped transducer |
| CN110732477A (en) * | 2019-10-25 | 2020-01-31 | 哈尔滨工程大学 | spiral sound wave transmitting transducer containing vibration-transmitting rod |
-
2016
- 2016-03-22 CN CN201620221011.7U patent/CN205833583U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689249A (en) * | 2016-03-22 | 2016-06-22 | 中国计量学院 | Compound drive piezoelectric ultrasonic-pipe-shaped transducer |
| CN110732477A (en) * | 2019-10-25 | 2020-01-31 | 哈尔滨工程大学 | spiral sound wave transmitting transducer containing vibration-transmitting rod |
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