CN104438028B - A kind of single excitation ultrasonic elliptical vibratory transducer - Google Patents
A kind of single excitation ultrasonic elliptical vibratory transducer Download PDFInfo
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- CN104438028B CN104438028B CN201410740266.XA CN201410740266A CN104438028B CN 104438028 B CN104438028 B CN 104438028B CN 201410740266 A CN201410740266 A CN 201410740266A CN 104438028 B CN104438028 B CN 104438028B
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Abstract
The invention discloses a kind of single excitation ultrasonic elliptical vibratory transducer, including single-excitation ultrasonic oval vibration energy converter and elliptical vibration modal transducer.Described single-excitation ultrasonic oval vibration energy converter includes that back shroud, piezoelectric ceramic piece, electrode slice and front shroud are coupled compression by bolt by bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, back shroud and front shroud；Described elliptical vibration modal transducer is arranged on the front end of front shroud, for straight beam and the composite construction of cant beam, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces can be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer end by this elliptical vibration modal transducer.The single-excitation ultrasonic oval vibration energy converter of the present invention uses sandwich type structural, has the advantages such as power capacity is big, simple in construction, elliptical vibration modal transducer part-structure rigidity big, energy conversion efficiency is high, stable work in work.
Description
Technical field
The present invention relates to the use of the supersonic vibration field of piezoelectric ceramics inverse piezoelectric effect, especially relate to a kind of use single-electrical signal to carry out the ultrasonic elliptical vibratory piezoelectric transducer encouraged.
Background technology
Ultrasonic elliptical vibratory has wide application in fields such as UVC, ultra-sonic welded, ultrasonic grinding, ultrasonic polishing, linear ultrasonic motor and rotary ultrasonic motors.Research worker uses extensional vibration mostly at present, twisting vibration, two kinds of vibration modes in bending vibration and radial vibration carry out being combined producing ultrasonic elliptical vibratory, need the piezoelectric ceramic piece using two groups or more to excite and produce two or more mode of oscillations with certain phase contrast, a road ultrasound-driven power supply signal must also be equipped with for often group piezoelectric ceramic piece, and need to control the phase contrast between the ultrasound-driven power supply signal of each road, ultrasonic vibration system and Control system architecture are complicated, manufacture difficulty is big, control difficulty high, production cost is high, it is difficult to realize miniaturization, service behaviour is not sufficiently stable, these problems constrain the application in the industrial production of ultrasonic elliptical vibratory transducer and popularization.
nullIn order to overcome the deficiency in above-mentioned ultrasonic elliptical vibratory transducer technology，Paper " elliptical vibration cutting transducer based on finite element analysis " on the 2nd phase of volume 31 " BJ University of Aeronautics & Astronautics's journal " in February, 2005，Propose the structure asymmetric ultrasonic elliptical vibratory cutting transducer of a kind of single signal of telecommunication excitation，And this transducer has been carried out finite element dynamic analysis and experimentation，Achieve preferable experiment effect，But it is intended to the conversion improving extensional vibration further to bending vibration，Improve the ratio of the short axle of elliptical vibration track and major axis，Improve cutting effect，The mode at side, horn front end interpolation mass and cutter that only relies on is dissatisfactory，And from horn to additional mass and from additional mass to cutter, need twice physical connection，Cause the ultrasonic vibrational energy loss from piezoelectric transducer to cutter bigger，Have impact on ultrasonic elliptical vibratory cutting effect.
Summary of the invention
The invention provides a kind of novel list excitation ultrasonic elliptical vibratory transducer in order to overcome deficiency present in above-mentioned single excitation single-excitation ultrasonic oval vibration energy converter.
A kind of single excitation ultrasonic elliptical vibratory transducer, including single-excitation ultrasonic oval vibration energy converter and elliptical vibration modal transducer, described single-excitation ultrasonic oval vibration energy converter is overall in cylinder, it includes bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, back shroud, piezoelectric ceramic piece, electrode slice and front shroud are coupled compression by bolt by back shroud and front shroud, constitute the energy conversion part of single-excitation ultrasonic oval vibration energy converter, the ultrasonic electric energy that ultrasonic-frequency power supply exports is converted to the ultrasonic vibrational energy of single-excitation ultrasonic oval vibration energy converter.
Described elliptical vibration modal transducer and front shroud are fabricated to a front end being integrally provided in front shroud, or the welding of elliptical vibration modal transducer is arranged on the front end of front shroud.Elliptical vibration modal transducer includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples with the front shroud of ultrasonic transducer, and the other end overhangs；The side of one end of cant beam and the front shroud off-center axis of ultrasonic transducer couples, the middle part of the other end and straight beam couples, the central axis of cant beam becomes 0-90 degree angle, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud to couple with the central axis of straight beam.
Elliptical vibration modal transducer is that the purpose of straight beam and cant beam composite construction is in order to change single mode of oscillation encouraging ultrasonic elliptical vibratory transducer so that it is longitudinal vibration mode frequency and flexural vibration mode frequency are close or equal；Existence due to oblique beam structure, the longitudinal ultrasonic vibration that single-excitation ultrasonic oval vibration energy converter produces is after being delivered to cant beam, it is decomposed into a part of extensional vibration component and a part of bending vibration component at cant beam root, the extensional vibration component that decomposes when cant beam and after bending vibration component is delivered to straight beam, it is combined mutually with the extensional vibration propagated on straight beam, finally in the formation of straight beam end, there is the extensional vibration component of certain phase contrast and the ultrasonic elliptical vibratory that bending vibration component is compound.Compare the list excitation ultrasonic elliptical vibratory transducer that existing document is introduced, the advantages such as this list excitation ultrasonic elliptical vibratory transducer has that power capacity is big, energy conversion efficiency is high, simple in construction, and the rigidity of structure is big, easy to manufacture, low cost, control drive system are simple and vibration performance is stable.
Further, the front shroud of described list excitation ultrasonic elliptical vibratory transducer is provided with ring flange, for coupling of single excitation ultrasonic elliptical vibratory transducer and external structure.
Further, described list excitation ultrasonic elliptical vibratory transducer only has one group of extensional vibration piezoelectric ceramic piece.
Further, described list excitation ultrasonic elliptical vibratory transducer Zhi Xu mono-road ultrasonic electric signal excitation.
Further, the operating frequency range of single excitation ultrasonic elliptical vibratory transducer is 18kHz-40kHz.
Present invention employs mechanical vibration MODAL TRANSFORMATION OF A mechanism and the extensional vibration conversion of single-excitation ultrasonic oval vibration energy converter is decomposed into the extensional vibration of straight beam, the extensional vibration of cant beam and bending vibration component, finally synthesize vertical curved composite ultrasonic elliptical vibratory at straight beam end, simplify the overall structure of ultrasonic elliptical vibratory transducer, greatly reduce the complexity of vibrational system, reduce manufacture, assembly difficulty and production cost, whole single excitation ultrasonic elliptical vibratory transducer architecture is simple, easy to manufacture, is conducive to being miniaturized the realization of target；Additionally this invention only needs a road control circuit and ultrasonic electric signal to encourage, control difficulty low, avoid two-phase or multiphase supersonic vibration and be compounded to form the complicated ultrasonic-frequency power supply development cost of elliptical vibration transducer, simplify control circuit and ultrasonic-frequency power supply structure, reduce control circuit and ultrasonic-frequency power supply cost, reduce control circuit and ultrasonic-frequency power supply volume, it is easily achieved the miniaturization of control circuit and ultrasonic-frequency power supply, integrated, improve reliability, service behaviour is more stable, has a extensive future.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the top view of present configuration schematic diagram.
Fig. 3 is the application example schematic diagram of the present invention.
Label declaration in figure: 1. bolt, 2. back shroud, 3. piezoelectric ceramic piece, 4. electrode slice, 5. front shroud, 6. ring flange, 7. elliptical vibration modal transducer, 8. ultrasonic-frequency power supply.
Detailed description of the invention
nullIn conjunction with Fig. 1、Shown in 2，A kind of single excitation ultrasonic elliptical vibratory transducer，Including single-excitation ultrasonic oval vibration energy converter and elliptical vibration modal transducer 7，Single-excitation ultrasonic oval vibration energy converter is overall in cylinder，It includes bolt 1 and the back shroud 2 being sequentially sleeved on bolt 1、Piezoelectric ceramic piece 3、Electrode slice 4 and front shroud 5，The ring flange 6 that can couple it is provided with external structure on front shroud，Back shroud 2 and front shroud 5 pass through bolt 1 by back shroud 2、Piezoelectric ceramic piece 3、Electrode slice 4 and front shroud 5 couple compression，Constitute single energy conversion part encouraging ultrasonic elliptical vibratory transducer，The ultrasonic electric energy that ultrasonic-frequency power supply 8 exports can be converted to the ultrasonic vibrational energy of single-excitation ultrasonic oval vibration energy converter，Single excitation ultrasonic elliptical vibratory transducer only has one group of extensional vibration piezoelectric ceramic piece 3，Piezoelectric ceramic transducer section diameter 30mm，Piezoelectric ceramic piece 3 is PZT-8，A size of:Ф 30 ×Ф 15 × 5, the sheet number of piezoelectric ceramic piece 3 is 2.
Elliptical vibration modal transducer 7 and front shroud 5 are fabricated to an one-piece parts and are arranged on the front end of front shroud 5, elliptical vibration modal transducer 7 includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples with the front shroud 5 of ultrasonic transducer, the other end overhangs, and the cross section length of side is 12×12mm, long 72mm；The side of one end of cant beam and the front shroud 5 off-center axis of ultrasonic transducer couples, and the middle part that central axis distance is 25mm, the other end and straight beam of the connection place distance front shroud 5 of cant beam central axis and front shroud 5 couples, and the cross section length of side is 12×12mm.The central axis of cant beam becomes 30 angles, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud 5 to couple with the central axis of straight beam, and transition arc radius is 5mm.
Single excitation ultrasonic elliptical vibratory transducer natural frequency is 19.84KHz, impedance is 83 ohm, dynamic electric resistor is 19 ohm, ultrasonic-frequency power supply 8 output voltage range is 0-400V, current range is 0-4A, output frequency is 19.84 ± 0.01KHz, and ultrasonic-frequency power supply 8 has automatic frequency tracking function in designated frequency range.
During operation, after the electrode slice 4 of single excitation ultrasonic elliptical vibratory transducer accesses the signal of telecommunication of ultrasonic-frequency power supply 8 output, inverse piezoelectric effect due to piezoelectric ceramic piece 3, piezoelectric ceramic piece 3 will produce longitudinal ultrasonic vibration, the electric energy that ultrasonic-frequency power supply 8 exports is converted to ultrasonic vibrational energy by i.e. single-excitation ultrasonic oval vibration energy converter, and drive whole transducer system to carry out longitudinal ultrasonic vibration, when ultrasonic vibrational energy is after single-excitation ultrasonic oval vibration energy converter is delivered to elliptical vibration modal transducer 7 end, the extensional vibration being converted to there is certain phase contrast and the compound vertical curved composite ultrasonic elliptical vibratory of bending vibration, i.e. be converted to the vertical curved composite ultrasonic elliptical vibratory of elliptical vibration modal transducer 7 end.
When single excitation ultrasonic elliptical vibratory transducer on-load voltage, run after within 10 minutes, reaching stable vibration state, the output voltage of ultrasonic-frequency power supply 8 is 220V, electric current is 1.35A, the ultrasonic elliptical vibratory long semi-minor axis amplitude using laser doppler vibrometer to record elliptical vibration modal transducer 7 end is respectively 14.3 microns and 5.2 microns, and the signal recorded laser doppler vibrometer by having the dual trace oscilloscope of lissajouf figure calculation function carries out graphic operation, the ultrasonic elliptical vibratory track that axial ratio is 2.73 can be obtained.
Claims (4)
1. a single excitation ultrasonic elliptical vibratory transducer: include single-excitation ultrasonic oval vibration energy converter and elliptical vibration modal transducer, described single-excitation ultrasonic oval vibration energy converter is overall in cylinder, it includes that back shroud, piezoelectric ceramic piece, electrode slice and front shroud are coupled compression by bolt by bolt and the back shroud being sequentially sleeved on bolt, piezoelectric ceramic piece, electrode slice and front shroud, back shroud and front shroud；It is characterized in that: described elliptical vibration modal transducer is arranged on the front end of front shroud, described elliptical vibration modal transducer includes the composite construction that straight beam and cant beam are constituted, straight beam and cant beam are perpendicular to the cross section of its center axis and are rectangle, the central axis of straight beam and the central axes of single-excitation ultrasonic oval vibration energy converter, one end of straight beam couples with the front shroud of ultrasonic transducer, and the other end overhangs；The side of one end of cant beam and the front shroud off-center axis of ultrasonic transducer couples, the middle part of the other end and straight beam couples, the central axis of cant beam becomes 0-90 degree angle, straight beam and cant beam to be arc transition with the connection place of ultrasonic transducer front shroud to couple with the central axis of straight beam.
A kind of single excitation ultrasonic elliptical vibratory transducer the most according to claim 1, it is characterised in that: described elliptical vibration modal transducer and front shroud are fabricated to a front end being integrally provided in front shroud.
A kind of single excitation ultrasonic elliptical vibratory transducer the most according to claim 1, it is characterised in that: described elliptical vibration modal transducer welding is arranged on the front end of front shroud.
A kind of single excitation ultrasonic elliptical vibratory transducer the most according to claim 1, it is characterised in that: it is provided with ring flange on front shroud, for coupling of single excitation ultrasonic elliptical vibratory transducer and external structure.
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| CN201410740266.XA CN104438028B (en) | 2014-12-09 | 2014-12-09 | A kind of single excitation ultrasonic elliptical vibratory transducer |
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| CN104438028B true CN104438028B (en) | 2016-08-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102016101660A1 (en) * | 2016-01-29 | 2017-08-03 | Weber Ultrasonics Gmbh | Method for exciting piezoelectric transducers and sound generating arrangement |
| CN107899492A (en) * | 2018-01-05 | 2018-04-13 | 苏州科技大学 | A kind of water based on ultrasonic wave disturbs device |
| CN109261476B (en) * | 2018-10-18 | 2023-10-27 | 四川大学 | Novel back cover plate for sandwich piezoelectric ultrasonic transducer |
| CN114083003B (en) * | 2021-11-23 | 2023-01-10 | 齐鲁工业大学 | Ultrasonic two-dimensional elliptical vibration cutting tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029758A (en) * | 2008-07-28 | 2010-02-12 | Honda Electronic Co Ltd | Langevin-type oscillator for fastening bolt |
| WO2011077660A1 (en) * | 2009-12-21 | 2011-06-30 | コニカミノルタオプト株式会社 | Electrical machine conversion element and drive device |
| CN203253608U (en) * | 2013-05-08 | 2013-10-30 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN203484326U (en) * | 2013-08-26 | 2014-03-19 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN204320630U (en) * | 2014-12-09 | 2015-05-13 | 苏州科技学院 | A kind of single excitation ultrasonic elliptical vibratory transducer |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029758A (en) * | 2008-07-28 | 2010-02-12 | Honda Electronic Co Ltd | Langevin-type oscillator for fastening bolt |
| WO2011077660A1 (en) * | 2009-12-21 | 2011-06-30 | コニカミノルタオプト株式会社 | Electrical machine conversion element and drive device |
| CN203253608U (en) * | 2013-05-08 | 2013-10-30 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN203484326U (en) * | 2013-08-26 | 2014-03-19 | 苏州科技学院 | Single-actuator ultrasonic elliptical vibration transducer |
| CN204320630U (en) * | 2014-12-09 | 2015-05-13 | 苏州科技学院 | A kind of single excitation ultrasonic elliptical vibratory transducer |
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Inventor after: Yin Zhen Inventor after: Zhu Zhanjun Inventor after: Li Zheng Inventor after: Zhang Lei Inventor after: Yang Xinming Inventor after: Liu Qinyun Inventor after: Chen Yang Inventor after: Wu Lei Inventor after: Xu Tie Inventor after: Zhang Shuai Inventor before: Yin Zhen Inventor before: Xu Tie Inventor before: Li Yan Inventor before: Cao Ziyang Inventor before: Wang Bangfu Inventor before: Zhuang Xiaobin Inventor before: Zhu Shumei Inventor before: Wu Yang Inventor before: Huang Qiang Inventor before: Wu Lei |
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