CN102794145A - Acoustic cavitation device - Google Patents
Acoustic cavitation device Download PDFInfo
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- CN102794145A CN102794145A CN2012102446094A CN201210244609A CN102794145A CN 102794145 A CN102794145 A CN 102794145A CN 2012102446094 A CN2012102446094 A CN 2012102446094A CN 201210244609 A CN201210244609 A CN 201210244609A CN 102794145 A CN102794145 A CN 102794145A
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Abstract
本发明实施例提供了一种声空化装置。所述装置包括：一个容器，用于盛液体；两个轴向在一条直线上相对放置的压电换能器声源；一个声源发生器，用于调整声源的频率、位置以及相位中的一个或多个参数。本发明实施例在远离声源表面的广大区域内产生强空化，在声源表面的区域内不产生强空化，实现的声空化空间分布的控制。解决了现有声空化主要产生在声源表面，不能在大规模液体中产生的问题。
An embodiment of the present invention provides an acoustic cavitation device. The device includes: a container for holding liquid; two piezoelectric transducer sound sources opposite to each other in a straight line; a sound source generator for adjusting the frequency, position and phase of the sound source One or more parameters of the . The embodiment of the present invention produces strong cavitation in a wide area away from the surface of the sound source, and does not generate strong cavitation in the area of the surface of the sound source, thereby realizing the control of the spatial distribution of the sound cavitation. It solves the problem that the existing acoustic cavitation is mainly generated on the surface of the sound source and cannot be generated in large-scale liquids.
Description
Technical field
The present invention relates to the acoustic cavitation field, particularly a kind of acoustic cavitation device.
Background technology
Chemists find under study for action, when the solution that produces chemical reaction is applied sound field, can measure the increase of the speed of chemical reaction, the increasing of chemical product output, and the reduction of chemical reaction condition, even can obtain new chemical product.Just because of ultrasonic processing at liquid, in a very big field, under lab show out of the ordinary, to such an extent as to a prosperous subject branch independently is called phonochemistry.Phonochemistry and sonication occupy an important position in ultrasonics, up to now, have been applied to considerable field, and for example food, nano material are synthetic, pharmacy, chemistry etc.
But the thousands of scientific achievement that phonochemistry or sonication obtain in the laboratory seldom is converted into productivity, and the sonication in the liquid does not receive due attention in real life.Ying Chongfu carried out practicability work and points out to cause the reason of this phenomenon in part because do not produce acoustic cavitation on a large scale in 2005.
Fig. 1 is diameter 120mm, the asynchronous taper cavitation bubble of frequency 20.7kHz horn input sound intensity sketch map.(a) sound intensity 1.8W/cm wherein
2, (b) sound intensity 3.5W/cm
2, (c) sound intensity 5.3W/cm
2, (d) sound intensity 8.2W/cm
2The ultrasonic amplitude transformer power sound intensity is added to 8W/cm
2After, form the cavitation bubble of taper on the water-immersed top of horn, after this, along with the increase of the horn sound intensity, bubble mainly be formed on the horn top near, form so-called " cavitation shielding " at last.At this moment the acoustic energy that increases can not be imported effectively in the liquid and in the wide of liquid and produce cavitation.
Therefore, merely add high-powerly, " amplification " existing acoustic processing device and acoustical power thereof may not necessarily obtain desired result simply.In addition, the input of very big acoustical power and very powerful electroacoustic transduction equipment cost are high, maintenance is difficult, it is energy-conservation to be unfavorable for.
Summary of the invention
In order to address the above problem, the embodiment of the invention proposes the acoustic cavitation device.Said device comprises: a container is used for holding liquid; Two PZT (piezoelectric transducer) sound sources of axially point-blank placing relatively; A sound source generator is used for adjusting frequency, the position of sound source, one or more parameters of phase place.Described sound source generator links to each other with said PZT (piezoelectric transducer) sound source.
The embodiment of the invention produces strong cavitation in away from the vast zone on sound source surface, in the zone on sound source surface, do not produce strong cavitation, realizes the control for the acoustic cavitation spatial distribution.Solved existing acoustic cavitation and mainly be created in the sound source surface, the problem that can not in mass liquid, produce.
Description of drawings
Fig. 1 is diameter 120mm of the prior art, the asynchronous taper cavitation bubble of frequency 20.7kHz horn input sound intensity sketch map;
Fig. 2 is the acoustic cavitation device sketch map of the embodiment of the invention;
Fig. 3 makes minimum pressure values that the time spent hydrophone measures for the single, double source of the embodiment of the invention and apart from the relation curve contrast sketch map of d;
Fig. 4 does the time spent for single double source of the embodiment of the invention, iodine method for releasing and hydrophone method measurement result contrast sketch map;
Fig. 5 is that diameter 5cm aluminium foil five percent weight loss and position under the sound field effect of single, double source concern sketch map.
The specific embodiment
In breadboard test, in small-scale test, people obtain apparent in view sonication effect with the acoustic cavitation enough amounts, that be fit to kind that sound wave can produce in liquid.But when testing on a large scale, used sound source mode when people often continue to use on a small scale strengthens acoustical power merely, strengthens fluid flow, the final discovery: the way of this simple amplification acoustical power, can not play the cavitation effect of proportional amplification.
Receive in this thinking under the prerequisite of existing acoustic technique restriction, this programme is considered another approach, promptly starts with from the mechanism of sonication and solves this problem.Sonication in the liquid, in the ordinary course of things, sound is not the main direct mechanism of action, be indirect means, and acoustic cavitation is only the mechanism of sonication.So should with might " ingeniously " guarantee the direct mechanism of action with sound field characteristic and other means---the efficient performance of acoustic cavitation, rather than only amplify acoustical power, the i.e. optimal control of acoustic cavitation spatial distribution simply.
Below in conjunction with accompanying drawing and specific embodiment the present invention is carried out detailed explanation.
Fig. 2 is a kind of acoustic cavitation device sketch map of the embodiment of the invention.As shown in Figure 2, said acoustic cavitation device comprises: a container is used for holding liquid; Two PZT (piezoelectric transducer) sound source T1, T2 that axially point-blank place relatively; A sound source generator is used for adjusting one or more parameters of frequency, position and the phase place of sound source.Described sound source generator links to each other with said PZT (piezoelectric transducer) sound source.Wherein, fundamental frequency mainly is to confirm during through the sound source initial design, and the adjustment of the frequency on the fundamental frequency basis is to realize through the swept signal source in the sound source.The adjustment of sound source position realizes through coordinatograph or guide rail.The adjustment of phase place is to realize through the design of the signal delay in the sound source circuit.
Be noted that to carrying out acoustic cavitation smoothly the amount of said liquid should at least can be with said sound source T1, the whole submergences of T2.
Preferably, a said container is used for holding liquid, specifically comprises: a container is used to fill with liquid.
Preferably, said container is a rectangular vessel.Certainly, said container also can be other shapes of containers, such as hydrostatic column, conical vessel etc., does not do qualification at this.
Preferably, said PZT (piezoelectric transducer) sound source is a cylindrical piezoelectric transducing device sound source.Certainly, the shape of said PZT (piezoelectric transducer) sound source also can be other shape, such as taper, cube shaped, cuboid etc., does not do qualification at this.
Fig. 3 makes minimum pressure values that the time spent hydrophone measures for the single, double source of the embodiment of the invention and apart from the relation curve contrast sketch map of d.As shown in Figure 3, move the measurement of carrying out sound field from T1 to the T2 direction along the axial direction of T1, T2 with hydrophone, the distance of hydrophone centre-to-centre spacing T1 is d, d is more than or equal to 1cm, smaller or equal to 7cm.The spacing that moves is 1cm.The gross electric capacity of power supply input is identical when working together with T1, T2 when T1 works independently.The acoustic pressure minimum of a value (peak suction) of getting the hydrophone measurement is as the experimental data of measuring.
During single transducer work, along with the increase of hydrophone to transducer T1 distance, the sound pressure signal min amplitude (absolute value) that records reduces, and this point is more obvious when input electric power is big.Near idle T2 the time, the acoustic pressure amplitude that records slightly increases, and this maybe be owing to the T2 reflection causes.
During two transducer work; Hydrophone is lower in the sound pressure signal min amplitude (absolute value) that the near surface of transducer T1 and T2 records; Sound pressure signal amplitude in that the zone line of transducer T1 and T2 records is higher, and this point also is that the gross electric capacity in the sound source input is more obvious when big.From Fig. 3, can find out when two transducers are worked simultaneously, more even when acoustic pressure distribution is spatially worked than single transducer.The measurement data of Fig. 3 is the mean value of calculating after twice of the hydrophone duplicate measurements.
Fig. 4 does the time spent for single double source of the embodiment of the invention, iodine method for releasing and hydrophone method measurement result contrast sketch map.As can beappreciated from fig. 4; When the measurement result of iodine method for releasing and hydrophone method have uniformity, single transducer work on trend; Near the burst size of iodine many (cavitation is strong) this transducer is along with the burst size of the increase iodine that leaves the transducer distance reduces (cavitation weakens rapidly) rapidly; And when two transducers are worked simultaneously, the burst size of iodine few (cavitation weak) in the vicinity of two transducers, in the zone of the centre of two transducers, (cavitation is strong) obviously strengthened in the release two of iodine.See from this point, realized the experiment expection of this programme.
Fig. 5 is that diameter 5cm aluminium foil five percent weight loss and position under the sound field effect of single, double source concern sketch map; Also be that Fig. 5 has showed five result of experiment of diameter 5cm aluminium foil.As can be seen from Figure 5, do the time spent at simple sund source, aluminium foil near work sound source near the time aluminium foil the weight that loses big, along with aluminium foil away from sound source, percent weight loss reduces rapidly; Do the time spent simultaneously in double sound source, the percent weight loss of aluminium foil is lower than the percent weight loss of two sound source zone lines near two sound sources.This has also realized " optimization of cavitation spatial distribution ".
The embodiment of the invention produces strong cavitation in away from the vast zone on sound source surface, in the zone on sound source surface, do not produce strong cavitation, has realized the control for the acoustic cavitation spatial distribution.Solved existing acoustic cavitation and mainly be created in the sound source surface, the problem that can not in mass liquid, produce.
The above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely the specific embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an acoustic cavitation device is characterized in that, said device comprises:
A container is used for holding liquid;
Two PZT (piezoelectric transducer) sound sources of axially point-blank placing relatively;
A sound source generator is used for adjusting one or more parameters of frequency, position and the phase place of sound source;
Described sound source generator links to each other with said PZT (piezoelectric transducer) sound source.
2. device as claimed in claim 1 is characterized in that, a said container is used for holding liquid, specifically comprises: a container is used to fill with liquid.
3. according to claim 1 or claim 2 device is characterized in that said container is rectangular vessel, hydrostatic column or conical vessel.
4. like the described device of one of claim 1-3, it is characterized in that said PZT (piezoelectric transducer) sound source is cylindrical piezoelectric transducing device sound source, taper PZT (piezoelectric transducer) sound source, cube shaped PZT (piezoelectric transducer) sound source or cuboid PZT (piezoelectric transducer) sound source.
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| CN2012102446094A CN102794145A (en) | 2012-07-13 | 2012-07-13 | Acoustic cavitation device |
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| CN2012102446094A CN102794145A (en) | 2012-07-13 | 2012-07-13 | Acoustic cavitation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831271A (en) * | 2014-03-19 | 2014-06-04 | 中国科学院声学研究所 | Ultrasonic cavitation cloud control device and ultrasonic cavitation cloud control method |
| CN104751835A (en) * | 2015-03-31 | 2015-07-01 | 中国飞机强度研究所 | Rotary sound source generating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201264929Y (en) * | 2008-06-27 | 2009-07-01 | 合肥工业大学 | Dot matrix type ultrasonic field strengthened inorganic diaphragm separator |
| CN101811751A (en) * | 2010-04-15 | 2010-08-25 | 南京航空航天大学 | Traveling wave type ultrasound reaction vessel |
| CN201842670U (en) * | 2010-10-18 | 2011-05-25 | 四平市铁东区庆升热工设备有限公司 | Flow type ultrasonic cavitation and degradation high-concentration printing sewage reactor |
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2012
- 2012-07-13 CN CN2012102446094A patent/CN102794145A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201264929Y (en) * | 2008-06-27 | 2009-07-01 | 合肥工业大学 | Dot matrix type ultrasonic field strengthened inorganic diaphragm separator |
| CN101811751A (en) * | 2010-04-15 | 2010-08-25 | 南京航空航天大学 | Traveling wave type ultrasound reaction vessel |
| CN201842670U (en) * | 2010-10-18 | 2011-05-25 | 四平市铁东区庆升热工设备有限公司 | Flow type ultrasonic cavitation and degradation high-concentration printing sewage reactor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103831271A (en) * | 2014-03-19 | 2014-06-04 | 中国科学院声学研究所 | Ultrasonic cavitation cloud control device and ultrasonic cavitation cloud control method |
| CN104751835A (en) * | 2015-03-31 | 2015-07-01 | 中国飞机强度研究所 | Rotary sound source generating device |
| CN104751835B (en) * | 2015-03-31 | 2018-11-13 | 中国飞机强度研究所 | A kind of rotation sound source generating means |
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Application publication date: 20121128 |