CN105689249B - The tubular energy converter of composite drive piezoelectric supersonic - Google Patents
The tubular energy converter of composite drive piezoelectric supersonic Download PDFInfo
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- CN105689249B CN105689249B CN201610163820.1A CN201610163820A CN105689249B CN 105689249 B CN105689249 B CN 105689249B CN 201610163820 A CN201610163820 A CN 201610163820A CN 105689249 B CN105689249 B CN 105689249B
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 66
- 239000002184 metal Substances 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000000919 ceramic Substances 0.000 claims abstract description 56
- 230000005611 electricity Effects 0.000 claims description 4
- 235000012431 wafers Nutrition 0.000 description 35
- 230000005855 radiation Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000032798 delamination Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—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 using multiple elements
- B06B1/0622—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 using multiple elements on one surface
- B06B1/064—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 using multiple elements on one surface with multiple active layers
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The present invention provides a kind of tubular energy converters of composite drive piezoelectric supersonic, are related to field of transducer, including tubular type metal shell, prestress application device, inner end 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 piece metal electrode film and even slice piezoelectric ceramic wafer；Metal electrode film and piezoelectric ceramic wafer interval stack；Adjacent electrode slice connection polarity opposite electrode；Prestress application device includes central supported block and screw rod；The column-shaped projection identical with the quantity of stack of piezo crystals is provided on the periphery of central supported block；Each column-shaped projection is provided with plug-in opening；Inner end vibration match block one end is provided with threaded hole；The other end is abutted with one end of one group of stack of piezo crystals；Outer end vibrates match block one end and housing is affixed；The other end and the stack of piezo crystals other end are affixed；Screw rod one end is stretched into plug-in opening, the other end and screw hole.Present application addresses the technical problems such as existing transducer power is small.
Description
Technical field
The present invention relates to field of transducer, more particularly, to a kind of tubular energy converter of composite drive piezoelectric supersonic.
Background technology
The function of ultrasonic transducer is that the electrical power of input is converted into mechanical output (i.e. ultrasonic wave) to pass again,
And a part of power that autophage is seldom.
With constantly bringing forth new ideas for ultrasonic technique, the continuous improvement of application level, power ultrasonic is defended in industrial and agricultural production, medical treatment
The fields such as raw, bio-pharmaceuticals and food processing have been widely used.Core of the ultrasonic transducer as ultrasound processing equipment
Center portion part, the quality of performance directly decide the application effect of power ultrasonic.
At present, widely used energy converter is extensional vibration sandwich piezoelectric transducer in ultrasound processing equipment.This
It is because the structure of such energy converter is simple, performance is stablized, and has many advantages, such as that power capacity is big and electromechanical conversion efficiency is high.It can
It is, with the continuous development of new high-tech industry, the raising of environment for human survival quality and material requirement, production and life institute
Power ultrasonic processing equipment proposes higher to the power capacity of its energy converter, acoustic radiation efficiency, sound wave effect range etc.
Requirement.Single extensional vibration sandwich piezoelectric ultrasonic transducer is due to limited power capacity, acoustic radiation area is small, sound wave effect
The deficiencies of direction is single has been unable to meet needs of the existing large power supersonic in production and life.
It is radial vibration sandwich transducer that relatively small number of another kind of energy converter is applied in ultrasound processing equipment, such to change
Can device be by the method for heat expansion and cold contraction by piezoelectric ceramic tube in the metal tube, and using this principle piezoelectric ceramic circular tube is applied by
Unidirectional radial direction prestressing force outside to inside.The swept area of radial vibration sandwich transducer is larger, and the sound wave of generation can be realized
Along the Omnidirectional radiation in radius space.But the prestressing force size for passing through application of expanding with heat and contract with cold is difficult control, prestressing force is bigger will
Piezoelectric ceramic tube is caused to crush, the power capacity of the smaller energy converter of prestressing force changes the performance required by energy converter is not achieved
When energy device input electric power is larger, strong vibration easily causes high voltage arc and electrode delamination, so such energy converter is in life
Application in production and life is relatively fewer.
Based on this, the present invention provides a kind of tubular energy converters of composite drive piezoelectric supersonic to solve above two ultrasonic wave
The technical issues of energy converter.
Invention content
It is of the prior art to solve the purpose of the present invention is to provide a kind of tubular energy converter of composite drive piezoelectric supersonic
Extensional vibration sandwich piezoelectric ultrasonic transducer is due to limited power capacity, acoustic radiation area is small, sound wave effect direction is single, with
And prestressing force suffered by radial vibration sandwich transducer piezoelectric ceramic tube is difficult to control, the caducous technical problem of electrode.
A kind of tubular energy converter of composite drive piezoelectric supersonic, the combination flooding dynamic pressure are provided in an embodiment of the present invention
The electric tubular energy converter of ultrasound includes tubular type metal shell, prestress application device, inner end vibration match block, outer end vibration matching
Block and stack of piezo crystals；The prestress application device, inner end vibration match block, outer end vibration match block and the pressure
Electric crystalline substance heap is located in the metal shell；The both ends of the metal shell are connected with metal cover board；
The stack of piezo crystals is not less than three groups；Stack of piezo crystals described in every group includes metal electrode film and idol described in odd number piece
Several pieces piezoelectric ceramic wafers；All piezoelectric ceramic wafer overlappings are placed；Piezoelectric ceramic wafer described in adjacent two panels it
Between clamp there are one the metal electrode film, also place respectively positioned at the outside of the piezoelectric ceramic wafer at both ends there are one
The metal electrode film；The adjacent electrode slice connects opposite polarity electrode by connecting line respectively；
The prestress application device includes central supported block and screw rod；The central supported block is cylindrical；The center
The column-shaped projection identical with the quantity of the stack of piezo crystals is provided on the periphery of supporting block；All column-shaped projection edges
The circumferential direction of the central support posts is uniformly distributed；Plug-in opening is both provided at the top center of each column-shaped projection；
The quantity of inner end vibration match block and the quantity of outer end vibration match block with the stack of piezo crystals
Quantity it is identical；The inner end vibration match block is cylindrical；Screw thread is provided at the center of described inner end vibration match block one end
Hole；The other end of the inner end vibration match block is abutted with one end of stack of piezo crystals described in one group；The outer end vibrates match block
One end and the inner wall of the metal shell it is affixed；The other end of the outer end vibration match block is another with the stack of piezo crystals
End abuts.
The quantity of the screw rod is identical with the quantity of the stack of piezo crystals；One end of the every screw rod is respectively protruding into one
In the plug-in opening, the other end respectively with a screw hole.
Optionally, the piezoelectric ceramic wafer is circle.
Optionally, the metal electrode film includes electrode portion and connecting portion, and the connecting portion and the electrode portion are affixed, institute
Connecting portion is stated for being connect with electrode；The electrode portion be the circular piece identical with the piezoelectric ceramic wafer outer diameter, the electricity
Pole portion overlaps with the piezoelectric ceramic wafer and stacks.
Optionally, the inner end vibration match block is cylinder, and both ends are plane；Outside the inner end vibration match block
Diameter is identical with the outer diameter of the piezoelectric ceramic wafer；One end and institute that the inner end vibration match block is abutted with the stack of piezo crystals
The electrode portion overlapping for stating electrode slice is placed.
Optionally, the outer end vibration match block is cylinder, the outer diameter and the piezoelectricity of the outer end vibration match block
The outer diameter of ceramic wafers is identical；One end that the outer end vibration match block is abutted with the stack of piezo crystals is planar ends, described flat
The electrode portion of the stack of piezo crystals of the face end with abutting is Chong Die to place.
Optionally, threading hole is provided at the center of one of them metal cover board, the connecting line is by the threading
The metal cover board is pierced by hole to connect with electrode.
Optionally, two metal cover boards are splayed cover board.
Optionally, it is provided with hexagonal screw head in the middle part of the screw rod.
Optionally, it is provided with internal thread in the plug-in opening；The hand of spiral of the internal thread and the spiral shell of the threaded hole
Direction is revolved on the contrary, the screw rod is double threaded screw, and the screw rod is spirally connected with plug-in opening.
Optionally, the outer end vibration match block is integrally formed with the metal shell.
Piezoelectric ceramics has the characteristics that：When voltage acts on piezoelectric ceramics, will be produced with the variation of voltage and frequency
Raw mechanically deform.On the other hand, it when piezoelectric ceramics is deformed by the effect of external force, is generated on its two comparative electrode faces
Positive and negative opposite charge.Using this principle, piezoelectric ceramics can be used as ultrasonic transducer.It is provided by the invention described
The tubular energy converter of composite drive piezoelectric supersonic is exactly the characteristics of piezoelectric ceramic wafer is utilized, and piezoelectric ceramics crystalline substance is given by electrode slice
Piece is powered, so as to produce ultrasonic vibration.
The tubular energy converter of composite drive piezoelectric supersonic provided by the invention, passes through the inner end of every group of stack of piezo crystals both sides
It vibrates match block and outer end vibration match block provides prestressing force to every group of stack of piezo crystals, by multigroup piezoelectricity being uniformly distributed circumferentially
The extensional vibration of brilliant heap is converted into the radial vibration of the metal shell of driving tubular type, simplifies existing radial vibration sandwich and changes
The labyrinth of energy device, also improves its power capacity and acoustic radiation efficiency.
Using prestress application device, by rotary screw, change between inner end vibration match block and central supported block away from
From collaboration outer end vibration match block block and metal shell apply multigroup stack of piezo crystals sufficiently large prestressing force, so not only
The power capacity of energy converter greatly improved, and enhance the radial rigidity of energy converter.Simultaneously convenient for adjusting control, Bu Huiyin
Prestressing force is excessive to damage piezoelectric ceramic wafer by pressure, will not cause the power capacity of entire stack of piezo crystals smaller because prestressing force is too small,
It can not meet demand.
Metal shell drives metal cover board to do extensional vibration while radial vibration, is generated so as to fulfill energy converter
Sound wave is radiation in the comprehensive of free space, further improves the radiation efficiency of energy converter.
The present apparatus has very very much not with the traditional sandwich piezoelectric transducer for connecting front and rear vibration match block by center bolt
Together, piezoelectric ring is fixed not against bolt, but its stack of piezo crystals is replaced the piezoelectric chip of circular ring shape by whole piece piezoelectric chip,
Match block is vibrated by inner end, outer end vibrates match block collaboration and fixes.Since the more traditional piezoelectric ring of piezoelectric patches has bigger
Volume, so further increasing the power capacity of energy converter.Moreover, electrode is done and by inner end vibration using electrode slice
With block, outer end vibration match block choking tightly, it is not easy to come off.
Based on this, the present invention is compared with original technology, and big with power capacity, acoustic irradiation area is big, being capable of comprehensive spoke
Penetrate, the prestressing force that stack of piezo crystals is subject to convenient for adjust and electrode it is not easily to fall off the advantages of.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it is clear that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the tubular energy converter front view of embodiment composite drive piezoelectric supersonic；
Fig. 2 is the tubular energy converter vertical view of embodiment composite drive piezoelectric supersonic；
Fig. 3 bows sectional view for the tubular energy converter of embodiment composite drive piezoelectric supersonic；
Fig. 4 is stack of piezo crystals structure diagram；
Fig. 5 is stack of piezo crystals side view.
Reference numeral：
1- metal shells；2- inner ends vibrate match block；3- outer ends vibrate match block；
4- stack of piezo crystals；5- metal cover boards；6- central supported blocks；
7- screw rods；8- column-shaped projections；9- plug-in openings；
10- threaded holes；11- threading holes；12- hexagonal screw heads；
13- piezoelectric ceramic wafers；14- electrode portions；15- connecting portions.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrated connection；It can
Be mechanical connection or electric welding connection；It can be directly connected, can also be indirectly connected by intermediary, it can be with
It is the connection inside two elements.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Embodiment
As shown in Figs. 1-5, a kind of tubular energy converter of composite drive piezoelectric supersonic is provided in the present embodiment, it is described compound
The tubular energy converter of piezoelectric supersonic is driven to include 7, three tubular type metal shell 1, central supported block 6, screw rod inner end vibration matchings
2, three outer end vibration match blocks 3 of block and three groups of stack of piezo crystals 4；Central supported block 6, screw rod 7, the inner end vibration match block 2,
The outer end vibration match block 3 and the stack of piezo crystals 4 are located in the metal shell 1；The both ends of the metal shell 1 are affixed
There is metal cover board 5；Central supported block 6, screw rod 7, inner end vibration match block 2, outer end vibration match block 3 are all using gold
Belong to material, stronger stress is provided, there is stronger rigidity, so as to improve the power capacity of device.
Stack of piezo crystals 4 described in every group includes metal electrode film described in odd number piece and even slice piezoelectric ceramic wafer 13；Institute
The overlapping of the piezoelectric ceramic wafer 13 having is placed；Institute there are one being clamped between piezoelectric ceramic wafer 13 described in adjacent two panels
Metal electrode film is stated, is also placed respectively there are one the metal electrode positioned at the outside of the piezoelectric ceramic wafer 13 at both ends
Piece；The adjacent electrode slice connects opposite polarity electrode by connecting line respectively.
The central supported block 6 is cylinder；There are three column-shaped projections 8 for setting on the periphery of the central supported block 6；
Three column-shaped projections 8 are uniformly distributed along the circumferential direction of the central support posts；Each group piezoelectric chip can be given by being uniformly distributed
The uniform prestressing force of heap, makes housing uniformly vibrate.Inserting is both provided at the top center of each column-shaped projection 8
Hole 9, centrally disposed place make active force be located at center, enhance the vibration performance of whole device.
The inner end vibration match block 2 is cylindrical；Threaded hole is provided at the center of described 2 one end of inner end vibration match block
10；The other end of the inner end vibration match block 2 is abutted with one end of stack of piezo crystals 4 described in one group；The outer end vibration matching
Block 3 is cylinder；One end of the outer end vibration match block 3 is planar ends, and the other end is curved end, the curvature of the curved end
It is identical with the curvature of 1 inner wall of metal shell, the one end and the metal shell 1 of the outer end vibration match block 3 for curved surface
Inner wall abuts；The other end of the outer end vibration match block 3 is abutted with the other end of the stack of piezo crystals 4.
The quantity of the screw rod 7 is three；One end of the every screw rod 7 is respectively protruding into a plug-in opening 9, separately
One end is spirally connected respectively with a threaded hole 10.That is all there are one outer end vibrations for the both sides of three groups of stack of piezo crystals 4
Its two-way prestressing force is given with block 3 and an inner end vibration match block 2.Since the outermost end of every group of stack of piezo crystals 4 is all electricity
Pole piece, that is to say, that the electrode slice of one end is abutted with outer end vibration match block 3, another electrode slice at another end and inner end
Vibration match block 2 abuts.And each inner end vibrates match block 2 with giving its outside prestressing force by a screw rod 7.
The spy of piezoelectric ceramic wafer 13 is utilized in the tubular energy converter of composite drive piezoelectric supersonic provided by the invention
Point is powered by electrode slice to piezoelectric ceramic wafer 13, so as to produce ultrasonic vibration.Pass through every group of 4 both sides of stack of piezo crystals
Inner end vibrates match block 2 and outer end vibration match block 3 provides prestressing force to every group of stack of piezo crystals 4, by multigroup circumferentially uniform point
The extensional vibration of the stack of piezo crystals 4 of cloth is converted into the radial vibration of the metal shell 1 of driving tubular type, simplifies existing radial direction and shakes
The labyrinth of dynamic sandwich transducer, also improves its power capacity and acoustic radiation efficiency.
Using prestress application device, by rotary screw 7, change between inner end vibration match block 2 and central supported block 6
Distance, collaboration outer end 3 pieces of match block of vibration and metal shell 1 apply multigroup stack of piezo crystals 4 sufficiently large pre- prestressing force, this
The power capacity of energy converter not only greatly improved in sample, but also enhances the radial rigidity of energy converter.It is convenient for adjusting control simultaneously,
Piezoelectric ceramic wafer 13 will not be damaged by pressure because prestressing force is excessive, the power of entire stack of piezo crystals 4 will not be caused because prestressing force is too small
Capacity is smaller, can not meet demand.
Metal shell 1 drives metal cover board 5 to do extensional vibration while radial vibration, is generated so as to fulfill energy converter
Sound wave in the comprehensive for radiation of free space, further improve the radiation efficiency of energy converter.
The present apparatus has very very much not with the traditional sandwich piezoelectric transducer for connecting front and rear vibration match block by center bolt 7
Together, piezoelectric ring is fixed not against bolt, but its stack of piezo crystals 4 is replaced the piezo crystals of circular ring shape by whole piece piezoelectric chip
Piece vibrates match block 2 by inner end, outer end vibrates match block 3 and chokes to fix.Since the more traditional piezoelectric ring of piezoelectric patches has
The volume of bigger, so further increasing the power capacity of energy converter.Moreover, electrode is done using electrode slice and passes through inner end
Vibration match block 2, outer end vibration match block 3 choking tightly, it is not easy to come off.
Based on this, the present invention is compared with original technology, and big with power capacity, acoustic irradiation area is big, being capable of comprehensive spoke
Penetrate, the prestressing force that stack of piezo crystals 4 is subject to convenient for adjust and electrode it is not easily to fall off the advantages of.
Such as Fig. 3-5, in the alternative of the present embodiment, the piezoelectric ceramic wafer 13 is circle.
Circular piezoelectric ceramic wafer is easy to process, compared with traditional sandwich piezoelectric transducer, does not need to center and in advance should
Power bolt is fixed, and under outer diameter same case, the application is using the stack of piezo crystals 4 of ceramic wafers composition compared with traditional sandwich pressure
Electric transducer is had the volume of bigger by the piezoelectric ceramics crystalline substance heap that annulus forms, and is held so as to further increase the power of energy converter
Amount.
Further, the metal electrode film includes electrode portion 14 and connecting portion 15, the connecting portion 15 and the electrode
Portion 14 is affixed, and the connecting portion 15 is used to connect with electrode；The electrode portion 14 be and the 13 outer diameter phase of piezoelectric ceramic wafer
Same circular piece, the electrode portion 14 are overlapped with the piezoelectric ceramic wafer 13 and are stacked.
Piezoelectric ceramic wafer 13 is arranged so that together with the entire laminated of electrode slice, is avoided when energy converter inputs electricity
When power is larger, strong vibration easily causes high voltage arc and electrode delamination.
Further, the inner end vibration match block 2 is cylinder, and both ends are plane；The inner end vibrates match block 2
Outer diameter it is identical with the outer diameter of the piezoelectric ceramic wafer 13；What the inner end vibration match block 2 was abutted with the stack of piezo crystals 4
One end is Chong Die with the electrode portion 14 of the electrode slice to place.
It is arranged such so that the prestressing force that inner end vibration match block 2 gives is vertical and uniformly acts on stack of piezo crystals 4
On, prevent prestressing force concentration from causing piezoelectric ceramic wafer 13 broken.
Further, vibration match block 3 in the outer end is cylinder, the outer diameter of the outer end vibration match block 3 with it is described
The outer diameter of piezoelectric ceramic wafer 13 is identical；One end that the outer end vibration match block 3 is abutted with the stack of piezo crystals 4 is plane
End, the electrode portion 14 of the stack of piezo crystals 4 of the planar ends with abutting is Chong Die to place.The other end is curved end, with gold
Belong to housing to abut, radius of curvature is equal with the radius of curvature of metal shell.
It is arranged such so that the prestressing force that outer end vibration match block 3 gives is vertical and uniformly acts on stack of piezo crystals 4
On, prevent prestressing force concentration from causing piezoelectric ceramic wafer 13 broken.
Such as Fig. 1-2, in the alternative of the present embodiment, threading is provided at the center of one of them metal cover board 5
Hole 11, the connecting line are pierced by the metal cover board 5 by the threading hole 11 and are connect with electrode.
Setting threading hole 11 penetrates convenient for electric wire.
Further, two metal cover boards 5 are splayed cover board.It can certainly be arranged to the lid of remaining shape
Plate.
Such as Fig. 3, in the alternative of the present embodiment, the middle part of the screw rod 7 is provided with hexagonal screw head 12.
The setting of hexagonal screw head 12 is convenient for screwing screw rod 7.
Further, it is provided with internal thread in the plug-in opening 9；The hand of spiral of the internal thread and the threaded hole 10
The hand of spiral on the contrary, the screw rod 7 is double threaded screw 7, the screw rod 7 is spirally connected with plug-in opening 9.
The mode of double threaded screw 7 can significantly adjust prestressing force.
Alternatively, the screw rod 7 is stepped, the one end being spirally connected with inner end vibration match block 2 is thicker thread segment.And with
One end of 6 grafting of central supported block is thinner smooth shank portions, is inserted directly into plug-in opening 9.This mode prestressing force adjusts model
It encloses small, but processes well.
In the alternative of the present embodiment, the outer end vibration match block 3 is integrally formed with the metal shell 1.
The relatively good processing of mode of abutting, but be integrally formed, the purpose is to avoid outer end vibration match block 3 and metal shell
Contact surface is formed between 1, effectively prevents transmission loss of the ultrasonic energy 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 piece and seven plate electrode pieces are staggered, and the polarization side of two neighboring piezoelectric ceramic wafer
To opposite.The side of central supported block 6 is there are four raised column-shaped projection, and the angle of adjacent two column-shaped projection 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 piece and five plate electrode pieces are staggered, and the polarization side of two neighboring piezoelectric ceramic wafer
To opposite.The side of central supported block 6 is there are four raised column-shaped projection, and the angle of adjacent two column-shaped projection is 90 degree.Its
His component and its structure, connecting relation is 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 chip and five plate electrode pieces are staggered, and the polarization direction of two neighboring piezoelectric ceramic wafer is opposite.Center
The side of supporting block 6 is there are four raised column-shaped projection, and the angle of adjacent two column-shaped projection is 60 degree.The metal-back of the present invention
Body 1, inner end vibration match block 2, outer end vibration match block 3, central supported block 6, upper cover plate, lower cover size can be according to reality
Requirement of engineering is selected.The piece number of piezoelectric ceramic wafer can basis in the group number of 4 groups of stack of piezo crystals and every group of stack of piezo crystals 4
The requirement of power is combined.Central supported block 6 can be arranged as required into square, cuboid, six prismatics etc..
In the alternative of the present embodiment, it is respectively arranged between two metal cover boards 5 and the metal shell 1 close
Seal.
Sealing characteristics are further improved, prevent the entrance of dust and moisture.
In the alternative of the present embodiment, two metal cover boards 5 are adopted with the metal shell 1 to be screwed.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of tubular energy converter of composite drive piezoelectric supersonic, which is characterized in that including tubular type metal shell, prestress application
Device, inner end vibration match block, outer end vibration match block and stack of piezo crystals；The prestress application device, inner end vibration
Match block, outer end vibration match block and the stack of piezo crystals are located in the metal shell；The both ends of the metal shell
It is connected with metal cover board；
The stack of piezo crystals is not less than three groups；Stack of piezo crystals described in every group includes metal electrode film and even slice described in odd number piece
Piezoelectric ceramic wafer；All piezoelectric ceramic wafer overlappings are placed；Between piezoelectric ceramic wafer described in adjacent two panels
It clamps there are one the metal electrode film, is also placed respectively there are one described in positioned at the outside of the piezoelectric ceramic wafer at both ends
Metal electrode film；The adjacent electrode slice connects opposite polarity electrode by connecting line respectively；
The prestress application device includes central supported block and screw rod；The central supported block is cylindrical；The central supported
The column-shaped projection identical with the quantity of the stack of piezo crystals is provided on the periphery of block；All column-shaped projections are described in
The circumferential direction of central support posts is uniformly distributed；Plug-in opening is both provided at the top center of each column-shaped projection；
The number of the quantity of the inner end vibration match block and the quantity of outer end vibration match block with the stack of piezo crystals
It measures identical；The inner end vibration match block is cylindrical；Threaded hole is provided at the center of described inner end vibration match block one end；Institute
The other end for stating inner end vibration match block is abutted with one end of stack of piezo crystals described in one group；One end of the outer end vibration match block
It is affixed with the inner wall of the metal shell；The other end and the other end of the stack of piezo crystals of the outer end vibration match block support
It connects；
The quantity of the screw rod is identical with the quantity of the stack of piezo crystals；One end of the every screw rod is respectively protruding into described in one
In plug-in opening, the other end respectively with a screw hole.
2. the tubular energy converter of composite drive piezoelectric supersonic according to claim 1, which is characterized in that the piezoelectric ceramics is brilliant
Piece is circle.
3. the tubular energy converter of composite drive piezoelectric supersonic according to claim 2, which is characterized in that the metal electrode film
Including electrode portion and connecting portion, the connecting portion and the electrode portion are affixed, and the connecting portion is used to connect with electrode；The electricity
Pole portion is the circular piece identical with the piezoelectric ceramic wafer outer diameter, and the electrode portion overlaps folded with the piezoelectric ceramic wafer
It puts.
4. the tubular energy converter of composite drive piezoelectric supersonic according to claim 2, which is characterized in that the inner end vibration
Cylinder with block, both ends are plane；The outer diameter phase of the outer diameter and the piezoelectric ceramic wafer of the inner end vibration match block
Together；The inner end vibration match block and one end that the stack of piezo crystals abuts placement Chong Die with the electrode portion of the electrode slice.
5. the tubular energy converter of composite drive piezoelectric supersonic according to claim 4, which is characterized in that the outer end vibration
Cylinder with block, the outer diameter of the outer end vibration match block is identical with the outer diameter of the piezoelectric ceramic wafer；The outer end shakes
One end that dynamic match block is abutted with the stack of piezo crystals is planar ends, and the planar ends are described with the stack of piezo crystals that abuts
Electrode portion overlapping is placed.
6. according to the tubular energy converter of claim 1-5 any one of them composite drive piezoelectric supersonics, which is characterized in that wherein one
Be provided with threading hole at the center of a metal cover board, the connecting line by the threading hole be pierced by the metal cover board with
Electrode connects.
7. the tubular energy converter of composite drive piezoelectric supersonic according to claim 6, which is characterized in that two metal covers
Plate is splayed cover board.
8. according to the tubular energy converter of claim 1-5 any one of them composite drive piezoelectric supersonics, which is characterized in that the spiral shell
Hexagonal screw head is provided in the middle part of bar.
9. the tubular energy converter of composite drive piezoelectric supersonic according to claim 8, which is characterized in that set in the plug-in opening
It is equipped with internal thread；The hand of spiral of the hand of spiral of the internal thread and the threaded hole on the contrary, the screw rod is double threaded screw,
The screw rod is spirally connected with plug-in opening.
10. according to the tubular energy converter of claim 1-5 any one of them composite drive piezoelectric supersonics, which is characterized in that described
Outer end vibrates match block and is integrally formed with the metal shell.
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| CN201610163820.1A CN105689249B (en) | 2016-03-22 | 2016-03-22 | The tubular energy converter of composite drive piezoelectric supersonic |
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| CN107403616B (en) * | 2017-07-17 | 2020-08-07 | 哈尔滨工程大学 | Low-frequency frame driving type quadrilateral flextensional transducer |
| CN115532570A (en) * | 2021-06-30 | 2022-12-30 | 中国科学院声学研究所 | Deep water nondirectional transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05245439A (en) * | 1992-03-06 | 1993-09-24 | Aisan Ind Co Ltd | Ultrasonic driving device |
| CN201143494Y (en) * | 2008-01-11 | 2008-11-05 | 中国石油天然气集团公司 | Large power acoustic emission transducer |
| CN101254499B (en) * | 2008-04-18 | 2010-06-09 | 北京信息工程学院 | Big opening angle stack wafer transmitting transducer |
| JP5963603B2 (en) * | 2012-08-03 | 2016-08-03 | オリンパス株式会社 | Ultrasonic vibration device, method of manufacturing ultrasonic vibration device, and ultrasonic medical device |
| CN103071612A (en) * | 2012-12-28 | 2013-05-01 | 深圳职业技术学院 | Sandwich type piezoelectric ceramic ultrasonic transducer |
| CN203265025U (en) * | 2013-05-31 | 2013-11-06 | 曾文海 | High efficiency, high temperature and high pressure ultrasonic transducer |
| CN205833583U (en) * | 2016-03-22 | 2016-12-28 | 中国计量学院 | The tubular transducer of composite flooding piezoelectric supersonic |
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