EP2709771A2 - Résonateur pour répartir et transformer partiellement des vibrations longitudinales et procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention - Google Patents

Résonateur pour répartir et transformer partiellement des vibrations longitudinales et procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention

Info

Publication number
EP2709771A2
EP2709771A2 EP12727610.3A EP12727610A EP2709771A2 EP 2709771 A2 EP2709771 A2 EP 2709771A2 EP 12727610 A EP12727610 A EP 12727610A EP 2709771 A2 EP2709771 A2 EP 2709771A2
Authority
EP
European Patent Office
Prior art keywords
resonator
vibrations
resonator according
lambda
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12727610.3A
Other languages
German (de)
English (en)
Other versions
EP2709771B1 (fr
Inventor
Harald Hielscher
Holger Hielscher
Thomas Hielscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Hielscher GmbH
Original Assignee
Dr Hielscher GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Hielscher GmbH filed Critical Dr Hielscher GmbH
Publication of EP2709771A2 publication Critical patent/EP2709771A2/fr
Application granted granted Critical
Publication of EP2709771B1 publication Critical patent/EP2709771B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • 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
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

Definitions

  • Resonator for the distribution and partial transformation of longitudinal vibrations and method for the treatment of at least one fluid by means of a resonator according to the invention
  • the present invention relates to a resonator for the distribution and partial transformation of longitudinal vibrations and to a method for the treatment of at least one fluid by means of a resonator according to the invention.
  • the invention is thus directed to an apparatus and method for transforming low frequency power ultrasonic vibrations (NFLUS vibrations) using a novel vibrational geometry.
  • This geometry allows a transformation and distribution of longitudinal vibrations in a resonator in longitudinal vibrations, which are superimposed with further oscillations.
  • Low frequency power ultrasound is ultrasound with an operating frequency of 15 to 100 kHz, preferably 15 to 60 kHz, e.g. 30 kHz and a sound power over 5 W, preferably 10 W to 1 .000 W, e.g. 200 W.
  • To generate the ultrasound for example piezoelectric or magnetostrictive systems are used. There are known linear transducers and flat or curved plate vibrators, bending oscillators or tubular resonators.
  • Low frequency power ultrasound is finding great use in the treatment of fluids, e.g. Food, cosmetics, paints and nanomaterials.
  • ultrasound is transmitted via a resonator with amplitudes of 1 to 350 ⁇ m, preferably 5 to 50 ⁇ m, e.g. 15 ⁇ transferred directly or indirectly into liquids.
  • Lambda is the wavelength which results from the NFLUS frequency and the sound propagation velocity in the resonator.
  • a resonator may consist of one or more lambda / 2 elements.
  • this reactor vessel may be under a pressure lower or higher than the ambient pressure.
  • a lower pressure negative pressure
  • ambient pressure eg 1 bar absolute
  • a higher pressure overpressure
  • Some systems use a vessel internal pressure between 1, 5 bar absolute to 1000 bar absolute, eg 3 bar absolute.
  • the sound transducer for example, a piezoelectric linear transducer located outside the vessel and the vibrations are guided via one or more resonators in the vessel interior.
  • the invention has for its object to provide a resonator and a method for treating at least one fluid with which fluids can be treated in a simple and efficient manner with vibrations.
  • the object is achieved by the resonator according to claim 1 and by the method for treating at least one fluid according to claim 20.
  • Advantageous embodiments of the resonator are the subject of the dependent claims 2 to 19.
  • a resonator which is capable of distributing and partially transforming longitudinal vibrations into longitudinal vibrations superimposed on the center of gravity or approximately the centroid of a cross-sectional area of at least one aperture included in the resonator.
  • the resonator comprises a natural number of parallel elements of at least lambda / 2 or a natural multiple thereof, wherein at least one of the lambda / 2 elements has at least one aperture adapted to transmit the transformed vibrations to a fluid located within the aperture ,
  • Lambda is the wavelength.
  • a lambda / 2 element an element of at least lambda / 2 or a natural multiple thereof is referred to as a lambda / 2 element.
  • the approximate course to the centroid is preferably meant that a deviation of up to 30 °, preferably up to 15 ° and in particular up to 10 ° to direct course of oscillation to the centroid is allowed.
  • the transformed vibration is directed radially or at least approximately radially to the center of the bore.
  • the transformed oscillation is directed exactly to the centroid of the opening or exactly radially to the center of the bore.
  • the opening may be arranged penetrating as a through-hole or a slot and consequently the resonator, or the opening is merely a recess or a concavity in the resonator, such.
  • B is a blind hole or a gutter-shaped depression.
  • the resonator may comprise a total of 2n lambda / 2 elements (or an integer multiple thereof) or else 2n + 1 lambda / 2 elements (or an integer multiple thereof).
  • n is an element of natural numbers.
  • each lambda / 2 element should have at least two openings.
  • the lambda / 2 elements may be separated by slots along part of their longitudinal extent.
  • the resonator has at least one lambda / 2 element which is suitable for reducing or increasing the amplitude of the oscillations present at the other lambda / 2 elements.
  • the cross section of at least one opening may be a polygon.
  • the oscillation directed toward the centroid or approximately to the centroid of a cross-sectional area of at least one opening has at least two oscillation nodes on the inside of the opening.
  • the resonator may have at least one opening on one end face, which is suitable for influencing at least one of the resonant frequencies of the resonator.
  • the end face is a side surface of the resonator which extends substantially or exactly perpendicular to the propagation direction of the longitudinal oscillations.
  • the resonator is preferably made of a steel alloy, an aluminum alloy, a titanium alloy, ceramic or a glass.
  • the resonator should be designed for the distribution and partial transformation of ultrasound with a frequency between 15 kHz and 40 kHz, in particular with a frequency between 16 kHz and 22 kHz.
  • the maximum diagonal of the opening arranged to transmit the vibrations to the fluid is between 1 mm and 100 mm.
  • the maximum amplitude of the vibrations in the longitudinal direction should be less than 30 ⁇ (peak-peak) and greater than 1 ⁇ (peak-peak), preferably greater than 5 ⁇ (peak-peak).
  • the resonator is particularly advantageous if it comprises a vessel in at least one opening, wherein the opening holds the vessel essentially in a form-fitting manner.
  • the opening holds the vessel completely positive fit.
  • At least one opening inner surface can at least partially lie positively against a vessel wall.
  • a method for treating at least one fluid by means of a resonator according to the invention in which longitudinal oscillations are distributed and partially transformed into center of gravity or approximately the centroid of a cross-sectional area of at least one cavity-containing opening directed vibrations associated with longitudinal vibrations are superimposed, wherein the transformed vibrations are transmitted to a fluid located within the opening, and wherein the volume of the fluid in the Opening is limited by a vessel, or the volume of the fluid in the opening is limited by the wall of the opening.
  • the longitudinal vibrations superimposed on the fluid by the vibrations directed at approximately the centroid of a cross-sectional area of at least one opening encompassed by the resonator are also transmitted to the fluid.
  • the vibrations are distributed to one or more openings or vessels arranged there and transferred to the fluid located there.
  • the fluid may be a gas as well as a liquid or a 2-phase mixture thereof.
  • a resonator consisting of several Lamda / 2 elements can be made of a piece of material of appropriate length or composed of several elements of length m * lambda / 2 (ne N), eg by screwing, welding, gluing or pressing.
  • Lambda / 2 elements can have different material cross-sectional geometries, eg circular, oval or rectangular cross sections. The cross-sectional geometry and area may vary along the longitudinal axis of a lambda / 2 element.
  • Lambda / 2 elements may be made of, among other things, metallic or ceramic materials or of glass, in particular of titanium, titanium alloys, steel or steel alloys, aluminum or aluminum alloys, eg of grade 5 titanium.
  • vibrations can be transmitted via the vessel wall to the vessel contents.
  • the vibration transmission to the vessel wall can be done on all sides and enclosing the entire vessel wall or only over part of the vessel wall. This part can e.g. enclose the cross section of the vessel.
  • the vibrations may be at different angles, e.g. act almost or completely perpendicularly from the resonator to the vessel wall.
  • the vibrations can act radially on the vessel cross section.
  • the vibrations may be directed radially to a point within the vessel cross-section, preferably to the centroid of the cross-sectional area of the vessel.
  • the resonator In order for the resonator to be able to surround a vessel, it must have an opening cross-section adapted to the vessel cross-section, which has at least one contact point, preferably at least two points of contact with the vessel cross-section. Any artwork at least one of these contact points should preferably be located outside of a minimum vibration of the resonator.
  • the resonator which preferably comprises a plurality of mutually connected to the maxima of the longitudinal vibrations Lamda / 2 elements and having openings in the lambda / 2 elements, it is possible to one or more of these lambda / 2 elements acting longitudinal vibrations to transform vibrations directed towards the centroid or approximately the centroid of a cross-sectional area of at least one aperture included by the resonator, which are superimposed with longitudinal vibrations.
  • Characteristic of the inventive design of the resonator are the openings introduced into at least one, preferably all, of the lambda / 2 elements, e.g. Holes, millings or slots or recesses introduced on one or more sides.
  • one or more openings or depressions can be introduced into one or more lambda / 2 elements.
  • the resonant frequencies of the resonator and the amplitude distribution along the opening cross-section lines are dependent inter alia on the outer geometry and the opening cross-sectional geometry.
  • the resonance frequencies of the resonator and the amplitude distribution along the opening cross-section line are additionally influenced.
  • Figure 1 a resonator according to the invention in the operating state with clarification of
  • FIG. 2 an amplitude-variation diagram of the oscillations
  • FIG. 3 shows a resonator according to the invention in a first embodiment variant
  • FIG. 4 shows a resonator according to the invention in a second embodiment
  • FIG. 5 shows a resonator according to the invention of a third embodiment
  • FIG. 6 shows a representation of the resonator from FIG. 5 in a first oscillation state
  • FIG. 7 shows a representation of the resonator from FIG. 5 in a second oscillation state.
  • the individual lambda / 2 elements 1 1 are separated by slots 15.
  • each lambda / 2 element 1 1 1 at least one opening 12 is provided, wherein in the embodiment variant shown in Figure 1, two openings 12 are arranged.
  • these openings 12 is the fluid to be treated 21 in not shown here vessels or even without a vessel, in which case the fluid 21 is received in the opening 12.
  • the openings 12 can penetrate the respective lambda / 2 element 11 or can also be present as a recess in the respective lambda / 2 element 11.
  • the resonator shown in Figure 1 is not shown to scale in the oscillating state.
  • the apertures 12 shown are in the idle state, ie in the unloaded state of the resonator 10, made substantially more compact, as can be seen for example from Figures 3 to 5.
  • each lambda / 2 element 1 1 two openings 12 are arranged.
  • FIG. 2 shows a diagram representing the distribution of the amplitude A along the extent s of two lambda / 2 elements 1 1. It can be seen that extreme values occur in the end regions of the respective lambda / 2 elements 11.
  • FIGS. 3 and 4 show two different embodiments of a resonator 10 according to the invention.
  • the resonator 10 illustrated in FIG. 3 additionally comprises a resonance influencing element 14 in the form of a further opening in the shaft 16, and a groove-shaped recess extending transversely across the parallel lambda / 2 elements 1 1 as another resonance influencing element 14
  • Resonance influencing elements 14 serve to adjust the resonance behavior of the resonator 10.
  • the resonator 10 shown in Figure 4 has to influence the resonance behavior on a side surface of a lambda / 2 element 1 1 another resonance influencing element 14 in the form of an opening and at the end face 13 each lambda / 2 element 1 1 associated with a resonance influencing element 14 in shape a hole on.
  • the resonator according to the invention can also be designed without shaft 16. It can also be seen that the elements arranged in parallel and separated by slots 15 have a length of 2 * lambda / 2, wherein in the individual lambda / 2 elements 1 1 2 openings 12 are arranged in each case.
  • the slots 15 between the lambda / 2 elements 1 1 preferably extend in the areas of the longitudinal extent 20, in which the openings 12 are arranged in parallel.
  • FIG. 5 A similar resonator according to the invention, as shown in FIG. 5, is shown in operating situations in FIGS. 6 and 7, but the resonator 10 shown in FIGS. 6 and 7 has only Lamda / 2 elements arranged in parallel and two openings each 12 have.
  • FIG. 6 shows a resonator 10 stretched in length extension 20 on account of its resonance behavior, which can be seen in particular from the deformation of the openings 12 into an elliptical shape extending in longitudinal extension 20.
  • the contours of the openings 12, as they are present in the non-oscillating state, are indicated by the dashed lines.
  • the shades shown represent in which regions of the resonator 10 minima and maxima of the amplitude distribution occur.
  • the resonator shown in FIG. 6 can be seen in a further oscillation state, the resonator 10 here being present in a state which is compressed in longitudinal extension 20, as can be seen from the elliptical shape of the openings 12 running perpendicular to the longitudinal extension 20.
  • vibrations introduced longitudinally into the resonator 10 are transformed into oscillations which are radial from Edge of the openings 12 act on the center.
  • fluids 21 can be exposed to such vibrations in the openings 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

La présente invention concerne un résonateur pour répartir et transformer partiellement des vibrations longitudinales et un procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention. Ledit résonateur sert à répartir des vibrations longitudinales et à les transformer partiellement en vibrations longitudinales qui sont superposées à des vibrations dirigées vers le centre de gravité ou sensiblement vers le centre de gravité d'une surface de section d'au moins une ouverture ménagée dans le résonateur. Le résonateur comprend un nombre naturel d'éléments parallèles d'au moins Lambda/2 ou un multiple naturel de cette valeur, au moins un des éléments Lambda/2 présentant au moins une ouverture apte à transmettre les vibrations transformées à un fluide se trouvant à l'intérieur de l'ouverture.
EP12727610.3A 2011-05-17 2012-05-16 Résonateur pour répartir et transformer partiellement des vibrations longitudinales et procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention Active EP2709771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161486823P 2011-05-17 2011-05-17
PCT/EP2012/059188 WO2012156475A2 (fr) 2011-05-17 2012-05-16 Résonateur pour répartir et transformer partiellement des vibrations longitudinales et procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention

Publications (2)

Publication Number Publication Date
EP2709771A2 true EP2709771A2 (fr) 2014-03-26
EP2709771B1 EP2709771B1 (fr) 2019-01-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12727610.3A Active EP2709771B1 (fr) 2011-05-17 2012-05-16 Résonateur pour répartir et transformer partiellement des vibrations longitudinales et procédé pour traiter au moins un fluide au moyen d'un résonateur selon l'invention

Country Status (3)

Country Link
US (1) US9502632B2 (fr)
EP (1) EP2709771B1 (fr)
WO (1) WO2012156475A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11813642B2 (en) * 2017-07-26 2023-11-14 Purdue Research Foundation Phononic system and method of making the same
US20210062823A1 (en) * 2019-09-03 2021-03-04 Garrett Transportation I Inc. Compressor with ported shroud for flow recirculation and with noise attenuator for blade passing frequency noise attenuation, and turbocharger incorporating same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514080A (en) * 1945-01-10 1950-07-04 Bell Telephone Labor Inc Method of obtaining high velocity with crystals
US2490452A (en) * 1946-08-16 1949-12-06 Bell Telephone Labor Inc Generation of transverse vibrations in liquids
US3029766A (en) * 1956-05-02 1962-04-17 Aeroprojects Inc Ultrasonic tool
US3584327A (en) * 1969-04-04 1971-06-15 Fibra Sonics Ultrasonic transmission system
FR2547225A1 (fr) * 1983-06-09 1984-12-14 Mecasonic Sa Perfectionnements apportes a la fabrication des sonotrodes ultrasoniques
FR2671737A1 (fr) 1991-01-17 1992-07-24 Vaxelaire Philippe Unite modulaire de reacteur ultra-sonique tubulaire.
DE19648986C1 (de) * 1996-11-26 1998-04-09 Raida Hans Joachim Gerichteter Stabstrahler
US5945642A (en) * 1998-03-13 1999-08-31 Minnesota Mining And Manufacturing Company Acoustic horn
CA2238951A1 (fr) * 1998-05-26 1999-11-26 Les Technologies Sonomax Inc. Reacteur a cavitation acoustique pour le traitement des materiaux
GB0222421D0 (en) * 2002-09-27 2002-11-06 Ratcliff Henry K Advanced ultrasonic processor
US7872400B2 (en) * 2007-09-24 2011-01-18 Dr. Hielscher Gmbh Ultrasonic device with a disk-shaped resonator
DE102008010617B4 (de) * 2008-02-22 2012-10-18 Bsonic Gmbh Hochleistungs-Ultraschallwandler und Verfahren zu dessen Herstellung

Non-Patent Citations (1)

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Title
See references of WO2012156475A2 *

Also Published As

Publication number Publication date
EP2709771B1 (fr) 2019-01-16
US9502632B2 (en) 2016-11-22
WO2012156475A2 (fr) 2012-11-22
WO2012156475A3 (fr) 2013-04-11
US20140184025A1 (en) 2014-07-03

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