CN103212532B - T-type superpower ultrasonic transducer - Google Patents
T-type superpower ultrasonic transducer Download PDFInfo
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- CN103212532B CN103212532B CN201310146169.3A CN201310146169A CN103212532B CN 103212532 B CN103212532 B CN 103212532B CN 201310146169 A CN201310146169 A CN 201310146169A CN 103212532 B CN103212532 B CN 103212532B
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Abstract
A kind of T-type superpower ultrasonic transducer that the present invention relates to, utilize extensional vibration piezoelectric ceramic vibrator to produce extensional vibration, the metal circular vibrating disk be directly connected with it is excited to produce with vibration frequently, and to radiative acoustic wave in medium, by means of the conversion of vibration mode, flexural vibrations are produced in metal circular vibrating disk, realize effective conversion that is longitudinal and beam mode, substantially improve the uniformity of transducer radiates sound field, can effectively increase transducer radiates area, realize high power work, increase the radiation impedance of transducer simultaneously, improve the acoustic matching of transducer, improve the radiation efficiency of transducer, in addition, because flexural vibration disk has a lot of mode of oscillations, therefore, this type of transducer can work on different mode of oscillations, the ultrasonic wave of radiation different frequency, thus form a kind of supersonic source of multiple-frequency operation.
Description
Technical field
The invention belongs to generation or the transmission equipment studying technological domain of supersonic frequency mechanical oscillation, particularly a kind of T-type superpower ultrasonic transducer.
Background technology
In power ultrasonic and underwater sound field, extensional vibration sandwich piezoelectric ceramic transducer, the application being also called Langevin transducer is comparatively wide, such as, for ultrasonic cleaning, Ultrasonic metal and Plastic Welding and Ultrasonic machining etc.Its structure mainly arranges piezoelectric ceramic piece at the middle part of pre-stressed bolt, and one end of pre-stressed bolt arranges metal bezel plate, and the other end arranges metal back cover plate, and the structure of front shroud is taper platform structure.The electromechanical conversion efficiency of this type of transducer is high, power capacity is large.But because this type of extensional vibration sandwich piezoelectric ceramic transducer itself is theoretical and structure limit, there is following weak point:
1, the design theory of longitudinal sandwich ultrasonic transducer requires the lateral dimension of transducer, i.e. diameter, 1/4th of the wave length of sound of transducer institute radiation can not be exceeded, therefore the acoustic irradiation area of this type of transducer is subject to the restriction of self theory, can not certain limit be exceeded, thus significantly limit acoustic irradiation area and the radiant power of this type of transducer.
2, for sandwich extensional vibration piezoelectric ceramic ultrasonic transducer, due to the restriction of swept area, when compared with large radiation power, the sound intensity of transducer is also very large, thus cause the vibration velocity of transducer inside, vibration displacement and longitudinal stress also very large, sometimes exceed the mechanical strength restriction of material, cause fracture or the damage of transducer.Thus this type of transducer is very strict for the requirement of transducer material.
In view of the above problems, in order to adapt to developing rapidly of ultrasonic technique, be necessary to research and develop novel power ultrasonic transducer, to overcome some outstanding problems existing for current clip core type extensional vibration ultrasonic transducer, i.e. the restricted problem of radiant power and acoustic irradiation area.
Summary of the invention
In order to overcome the deficiency existing for ultrasonic transducer of the prior art, the invention provides a kind of effective conversion that can realize longitudinal direction and beam mode in transducer, increase the swept area of transducer, improve the acoustic matching of transducer, improve the T-type superpower ultrasonic transducer of the radiant power of transducer.
The present invention solves the problems of the technologies described above adopted technical scheme:
This T-type superpower ultrasonic transducer is that vibration passing direction is disposed with back shroud, piezoelectric ceramic stack and vibrating disk along the longitudinal, and piezoelectric ceramic stack is arranged on the median plane of vibrating disk, and the diameter of vibrating disk is at least 3 times of the diameter of piezoelectric ceramic stack.
The diameter of above-mentioned vibrating disk is 3 ~ 6 times of the diameter of piezoelectric ceramic stack.
Above-mentioned back shroud is circular metal cover plate, and piezoelectric ceramic stack is made up of at least 2 piezoelectric ceramic pieces coaxially arranged, and back shroud diameter is at least 1.02 times of piezoelectric ceramics diameter, preferably 1.02 ~ 1.12 times.
Above-mentioned back shroud is steel plate, copper coin or steel copper alloy plate.
Above-mentioned vibrating disk is circular metal plate, any one specifically in aluminium, titanium, magnesium and aluminum titanium alloy, titanium magnesium alloy, almag.
T-type superpower ultrasonic transducer of the present invention changes the taper platform metal cylinder producing extensional vibration in traditional sandwich piezoelectric ceramic transducer into the large-sized rosette that can produce flexural vibrations, extensional vibration piezoelectric ceramic vibrator is utilized to produce extensional vibration, the metal circular vibrating disk be directly connected with it is excited to produce with vibration frequently, and to radiative acoustic wave in medium, by means of the conversion of vibration mode, flexural vibrations are produced in metal circular vibrating disk, realize effective conversion that is longitudinal and beam mode, because the diameter of vibrating disk is large, substantially improve the uniformity of transducer radiates sound field, can effectively increase transducer radiates area, realize high power work, increase the radiation impedance of transducer simultaneously, improve the acoustic matching of transducer, improve the radiation efficiency of transducer, in addition, because flexural vibration disk has a lot of mode of oscillations, therefore, this type of transducer can work on different mode of oscillations, the ultrasonic wave of radiation different frequency, thus form a kind of supersonic source of multiple-frequency operation, this invention can be widely used in ultrasonic cleaning, ultrasonic extraction, ultrasonic emulsification, in the liquid handling such as ultrasonic antiscaling and sonochemistry technology.
Accompanying drawing explanation
Fig. 1 is the transducer architecture schematic diagram of embodiment 1.
Detailed description of the invention
Now by reference to the accompanying drawings technical scheme of the present invention is further described, but the present invention is not limited only to the situation of following enforcement.
Embodiment 1
The present embodiment is for the T-type superpower ultrasonic transducer of 20 KHzs, and as seen from Figure 1, the ultrasonic transducer of the present embodiment is made up of the connection of vibrating disk 1, piezoelectric ceramic stack 2 and back shroud 3.
The vibrating disk 1 of the present embodiment is by high strength, low-loss light metal material is made, this enforcement aluminium alloy material is made, its geometry is disc-shape, its diameter is 180mm, thickness is 18mm, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 coaxially stacks into by 4 piezoelectric ceramic pieces the cylinder that thickness is 24mm, the thickness of each piezoelectric ceramic piece is 6mm, diameter is 60mm, namely the diameter of vibrating disk 1 is 3 times of piezoelectric ceramic piece diameter, be adhesively fixed by seccotine between piezoelectric ceramic piece, back shroud 3 is fixed with at the other end of piezoelectric ceramic stack 2, back shroud 3 adopts high strength, low-loss heavy metal material is made, Steel material is selected in the present embodiment, its geometry is disc, diameter is 61.2mm, be 1.02 times of piezoelectric ceramic piece diameter.The height of back shroud is 72mm.To be connected with back shroud 3 by piezoelectric ceramic stack 2 and form longitudinal vibrator, be the ultrasonic transducer of T-type structure with vibrating disk 1 in conjunction with Formation cross-section, extensional vibration is produced by longitudinal vibrator, vibrating disk 1 direct coupled with it is excited to produce with flexural vibrations frequently, thus to the sound wave of radiation in medium 20 KHz.
Embodiment 2
The present embodiment is for the T-type superpower ultrasonic transducer of 25 KHzs, the geometry of vibrating disk 1 is disc-shape, its diameter is 260mm, thickness is 21mm, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 coaxially stacks into by 4 piezoelectric ceramic pieces the cylinder that thickness is 24mm, the thickness of each piezoelectric ceramic piece is 6mm, diameter is 50mm, namely the diameter of vibrating disk 1 is 5.2 times of piezoelectric ceramic piece diameter, be adhesively fixed by seccotine between piezoelectric ceramic piece, back shroud 3 is fixed with at the other end of piezoelectric ceramic stack 2, back shroud 3 adopts high strength, low-loss Steel material is made, its geometry is disc, diameter is 52mm, be 1.04 times of piezoelectric ceramic piece diameter, the height of back shroud is 52mm.Other parts and connecting relation identical with embodiment 1.
Embodiment 3
The present embodiment is for the T-type superpower ultrasonic transducer of 30 KHzs, the geometry of vibrating disk 1 is disc-shape, its diameter is 206mm, thickness is 15mm, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 coaxially stacks into by 4 piezoelectric ceramic pieces the cylinder that thickness is 24mm, the thickness of each piezoelectric ceramic piece is 6mm, diameter is 50mm, namely the diameter of vibrating disk 1 is 4.12 times of piezoelectric ceramic piece diameter, be adhesively fixed by seccotine between piezoelectric ceramic piece, back shroud 3 is fixed with at the other end of piezoelectric ceramic stack 2, back shroud 3 adopts high strength, low-loss Steel material is made, its geometry is disc, diameter is 52mm, be 1.04 times of piezoelectric ceramic piece diameter, the height of back shroud is 42mm.Other parts and connecting relation identical with embodiment 1.
Embodiment 4
The present embodiment is for the T-type superpower ultrasonic transducer of 35 KHzs, the geometry of vibrating disk 1 is disc-shape, its diameter is 210mm, thickness is 18mm, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 coaxially stacks into cylinder by 4 piezoelectric ceramic pieces, the thickness of each piezoelectric ceramic piece is 5mm, diameter is 35mm, namely the diameter of vibrating disk 1 is 6 times of piezoelectric ceramic piece diameter, be adhesively fixed by seccotine between piezoelectric ceramic piece, back shroud 3 is fixed with at the other end of piezoelectric ceramic stack 2, the geometry of back shroud 3 is disc, diameter is 38.5mm, be 1.1 times of piezoelectric ceramic piece diameter, the height of back shroud is 36mm.Other parts and connecting relation identical with embodiment 1.
Embodiment 5
The present embodiment is for the T-type superpower ultrasonic transducer of 40 KHzs, the geometry of vibrating disk 1 is disc-shape, its diameter is 180mm, thickness is 15mm, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 coaxially stacks into cylinder by 4 piezoelectric ceramic pieces, the thickness of each piezoelectric ceramic piece is 4.5mm, diameter is 40mm, namely the diameter of vibrating disk 1 is 4.5 times of piezoelectric ceramic piece diameter, be adhesively fixed by seccotine between piezoelectric ceramic piece, back shroud 3 is fixed with at the other end of piezoelectric ceramic stack 2, the geometry of back shroud 3 is cylindrical, diameter is 44.8mm, be 1.12 times of piezoelectric ceramic piece diameter.The height of back shroud is 31mm.Other parts and connecting relation identical with embodiment 1.
Embodiment 6
Circular vibration dish 1 in above-described embodiment 1 ~ 5 can adopt titanium alloy material to make, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 is coaxially stacked by 2 piezoelectric ceramic pieces, be fixed with back shroud 3 at the other end of piezoelectric ceramic stack 2, back shroud 3 adopts copper product to make.Other parts and connecting relation identical with corresponding embodiment.
Embodiment 7
Circular vibration dish 1 in above-described embodiment 1 ~ 5 can adopt titanium alloy material to make, piezoelectric ceramic stack 2 is connected with by the metal bolts of high strength in the center of vibrating disk 1, piezoelectric ceramic stack 2 is coaxially stacked by 6 piezoelectric ceramic pieces, be fixed with back shroud 3 at the other end of piezoelectric ceramic stack 2, back shroud 3 adopts copper product to make.Other parts and connecting relation identical with corresponding embodiment.
Embodiment 8
Circular vibration dish 1 in above-described embodiment 1 ~ 7 can also adopt magnesium or titanium magnesium alloy or almag or aluminum titanium alloy material to make, and back shroud 3 can adopt the alloy material of steel and copper to make.Other parts and connecting relation identical with corresponding embodiment.
The size of the back shroud 3 in above-described embodiment, piezoelectric ceramic stack 2 and vibrating disk 1 also can adjust according to practical application.In addition, the frequency of transducer also can carry out concrete design according to the application of reality and requirement.
Claims (5)
1. a T-type superpower ultrasonic transducer, vibration passing direction is disposed with back shroud (3), piezoelectric ceramic stack (2) and vibrating disk (1) along the longitudinal, it is characterized in that: piezoelectric ceramic stack (2) is arranged on the median plane of vibrating disk (1), the diameter of vibrating disk (1) is at least 3 times of the diameter of piezoelectric ceramic stack (2); Back shroud (3) is circular metal cover plate, and piezoelectric ceramic stack (2) is made up of at least 2 piezoelectric ceramic pieces coaxially arranged, and back shroud (3) diameter is at least 1.02 times of piezoelectric ceramic stack (2) diameter.
2. T-type superpower ultrasonic transducer according to claim 1, is characterized in that: the diameter of described vibrating disk (1) is 3 ~ 6 times of the diameter of piezoelectric ceramic stack (2).
3. T-type superpower ultrasonic transducer according to claim 1, is characterized in that: described back shroud (3) diameter is 1.02 ~ 1.12 times of piezoelectric ceramic stack (2) diameter.
4. the T-type superpower ultrasonic transducer according to claim 1 or 3, is characterized in that: described back shroud (3) is steel plate, copper coin or steel copper alloy plate.
5. T-type superpower ultrasonic transducer according to claim 1, it is characterized in that: described vibrating disk (1) is circular metal plate, the material of described vibrating disk (1) is any one in aluminium, titanium, magnesium and aluminum titanium alloy, titanium magnesium alloy, almag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146169.3A CN103212532B (en) | 2013-04-24 | 2013-04-24 | T-type superpower ultrasonic transducer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310146169.3A CN103212532B (en) | 2013-04-24 | 2013-04-24 | T-type superpower ultrasonic transducer |
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| CN103212532A CN103212532A (en) | 2013-07-24 |
| CN103212532B true CN103212532B (en) | 2016-04-06 |
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| CN201310146169.3A Expired - Fee Related CN103212532B (en) | 2013-04-24 | 2013-04-24 | T-type superpower ultrasonic transducer |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104923468B (en) * | 2014-03-19 | 2018-10-23 | 中国科学院大连化学物理研究所 | A kind of high-power ultrasonics microreactor |
| CN107917740A (en) * | 2017-12-28 | 2018-04-17 | 西安石油大学 | The double-frequency ultrasound wave transducer of biphase gas and liquid flow flow measurement |
| CN113058524A (en) * | 2021-03-16 | 2021-07-02 | 化学与精细化工广东省实验室 | Ultrasonic wave tubular reactor |
| CN113663980B (en) * | 2021-08-20 | 2022-10-14 | 陕西师范大学 | Ultrasonic transducer, ultrasonic cleaning device and cleaning method capable of vibrating in multiple directions |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003174695A (en) * | 2001-12-07 | 2003-06-20 | Nec Corp | Sound wave transceiver |
| CN102169687A (en) * | 2011-03-24 | 2011-08-31 | 无锡中科超声技术有限公司 | High-temperature high-power buckling vibration ultrasonic transducer |
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2013
- 2013-04-24 CN CN201310146169.3A patent/CN103212532B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003174695A (en) * | 2001-12-07 | 2003-06-20 | Nec Corp | Sound wave transceiver |
| CN102169687A (en) * | 2011-03-24 | 2011-08-31 | 无锡中科超声技术有限公司 | High-temperature high-power buckling vibration ultrasonic transducer |
Non-Patent Citations (1)
| Title |
|---|
| 夹心式纵弯振动换能器特性研究及有限元仿真;原林;《中国优秀硕士学位论文全文数据库基础科学辑》;20080115;18-42页 * |
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