EP2743919B1 - Dispositif de sollicitation de fluides liquides avec des ultrasons via une membrane et système à ultrasons - Google Patents

Dispositif de sollicitation de fluides liquides avec des ultrasons via une membrane et système à ultrasons Download PDF

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Publication number
EP2743919B1
EP2743919B1 EP13189307.5A EP13189307A EP2743919B1 EP 2743919 B1 EP2743919 B1 EP 2743919B1 EP 13189307 A EP13189307 A EP 13189307A EP 2743919 B1 EP2743919 B1 EP 2743919B1
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EP
European Patent Office
Prior art keywords
ultrasound
contact surface
sound
ultrasonic system
channel
Prior art date
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Application number
EP13189307.5A
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German (de)
English (en)
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EP2743919A2 (fr
EP2743919A3 (fr
Inventor
Rainer Jung
Roland Radandt
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BANDELIN patent & Co KG GmbH
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BANDELIN patent & Co KG GmbH
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Publication of EP2743919A3 publication Critical patent/EP2743919A3/fr
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Classifications

    • 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
    • B06B1/0611—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 in a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
    • B05B17/0646—Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
    • G10K9/125—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means with a plurality of active elements

Definitions

  • the invention relates to a device for applying liquid media with ultrasound through a membrane, wherein the device comprises an ultrasound generator for generating ultrasound and a sound conducting element for guiding the ultrasound generated by the ultrasound generator, and the sound conducting a contact surface for coupling the ultrasound to a flexible medium or flexible material (the terms “flexible medium” and “flexible material” are used as synonyms in the present application), in particular a membrane.
  • the US 5,282,005 relates to various arrangements of ultrasonic sonotrodes.
  • the WO 90/06816 A1 relates to a universal craft with an ultrasonic generator. To make it possible to produce a high ultrasonic energy, this has two piezoceramic plates with electrodes arranged therebetween and corresponding power supply lines. The two piezoceramic plates with the electrodes are firmly clamped between two metallic vibrating bodies. The vibrating body forming the generator head body is formed so as to accommodate a plurality of different generator heads each adapted to different applications in shape.
  • the EP 0 973 149 A2 concerns different forms of ultrasound sonotrodes.
  • the WO 2012/028696 A1 relates to an apparatus and method for atomizing flowable media by means of low frequency power ultrasound. It is provided that the device comprises an ultrasound system and at least one carrier element, wherein the carrier element is positioned near or in direct contact with at least part of the oscillating surface of the ultrasound system and the fluid medium is supplied to the ultrasound region by means of the carrier element.
  • the EP 2 090 370 B1 shows a device with an ultrasonic spray head and an air flow generator, wherein atomized particles are entrained by the air flow.
  • the DE 10 2004 025 836 B3 shows a device for introducing ultrasound into a flowable medium by means of a sonotrode, wherein a film is attached to the sonotrode and the ultrasonic power is introduced via the film in the medium.
  • the object of the invention is to propose an ultrasound system or a device which enables the most efficient possible ultrasonic coupling to a flexible material, wherein a mechanical stress of the flexible material is kept as low as possible.
  • the ultrasound system according to claim 1 includes the following features: a device for applying liquid media with ultrasound through a membrane, wherein the device comprises an ultrasound generator for generating ultrasound and a Schallleitelement for guiding the ultrasound generated by the ultrasound generator and the Schallleitelement a contact surface for decoupling the ultrasound a flexible material, wherein the Schallleitelement comprises a channel having a first opening for applying negative pressure to the channel and a second opening for applying the negative pressure to the flexible material, and a vacuum source, which is adapted to generate a negative pressure and with the channel connected is.
  • the ultrasound system of claim 1 also includes the flexible material adjacent the abutment surface, and the liquid media to be ultrasonically treated are surrounded by the flexible material.
  • the sound conducting element comprises a channel with a first opening for connecting a pump to the channel and a second opening for applying a negative pressure to the flexible material, for example within the contact surface
  • a flexible material can be coupled into the ultrasound be sucked by means of negative pressure to the contact surface. This allows a very even distribution of a contact pressure over the contact surface. A mechanical stress of the flexible material is thus reduced.
  • a negative pressure can be adjusted particularly well reproducible and precise.
  • the ultrasound generator may, for example, comprise at least one piezoelectric element.
  • the ultrasound generator comprises a plurality of piezoelectric elements, wherein at least a first piezoelectric element of the generation of ultrasound and at least one second piezoelectric element is used for the detection of ultrasound, and is suitably connected thereto.
  • the at least one first piezoelectric element may be connected to a voltage supply for the vibration excitation of the first piezoelectric element.
  • the second piezoelectric element may, for example, be connected to a measuring device for measuring the ultrasound passing through the second piezoelectric element.
  • the measuring device can determine the amplitude and / or power of the ultrasound passing through the second piezoelectric element via the voltage generated by the at least one second piezoelectric element.
  • the second piezoelectric element may be, for example be arranged between the first piezoelectric element and the contact surface, in particular between the first piezoelectric element and the Schallleitelement. Instead, however, the first piezoelectric element may also be arranged between the second piezoelectric element and the sound conducting element.
  • the contact surface circumferential sealing element.
  • the sealing element, the contact surface and the flexible material form a pressure space in which the flexible material is sucked against the contact surface with a uniform pressure.
  • the contact surface may be concave.
  • it is also a planar shape (especially when a sealing element is used) of the contact surface possible.
  • the outer region of the contact surface then forms a sealing edge, which has the same effect as a sealing element.
  • the sound conducting element which may be arranged so that the ultrasound is passed through the sound conducting element, may have at least one tapered region.
  • a region is regarded as being tapered if, in this region, the cross-sectional area of the sound-conducting element in a plane orthogonal to the direction of sound propagation is smaller than the cross-sectional area outside this region.
  • the cross-sectional area in the tapered region can be smaller than the contact surface.
  • the sound-conducting element can be designed, for example, rotationally symmetrical and, in particular, as a rotationally symmetrical rod. However, it can also be designed differently from a rotationally symmetrical shape.
  • the sound-conducting element can be shaped as a rod with a triangular or quadrangular cross-section.
  • the sound conducting element may have a first part connected to the ultrasound generator and a second part having the contact surface.
  • the two parts are then connected to each other, wherein the compound may be formed in particular detachable.
  • the connection may be formed as a screw connection.
  • the tapered region can be arranged in particular in the second part having the contact surface.
  • a taper portion in which the cross section decreases in the direction of the abutment surface may be arranged in the first part.
  • an ultrasound generator having a large cross-sectional area and a small amplitude can be used, wherein the ultrasound is concentrated by the taper section to a smaller cross-sectional area.
  • both a tapered portion and a tapered portion are present, both contribute to the amplification of the amplitude at the contact surface.
  • the channel can at least partially pass through both the first and the second part of the sound-conducting element.
  • the second part for example, can also be completely traversed by the channel.
  • the arranged in the contact surface second opening is then part of the second part, while serving to connect a pump first opening is part of the first part. Characterized in that the serving to connect the pump opening is part of the first part, it is not necessary in case of (for example, wear-related) replacement of the second part to release a connection between the pump and the device.
  • a diameter of the channel can change over its length.
  • the diameter of the channel may change within the second part and / or in the region of the connection between the first and the second part.
  • the device may comprise a termination element which is arranged on the side remote from the sound conducting element side of the ultrasound generator.
  • the first part, the second part and / or the closing element may be formed of the same or of different materials.
  • a solid material that can withstand high vibration / strain stresses comes into question as materials.
  • the material or materials should be low in attenuation.
  • suitable metals, alloys, plastics or ceramics may be used as the material.
  • the sound-conducting element can also be formed in one piece. Even with a one-piece design, the above-mentioned materials for the Schalleitelement can be used.
  • the ultrasound generator can be used to generate ultrasound with a frequency between 20 kHz and 100 kHz (in particular between 30 kHz and 40 kHz kHz).
  • the length of the device may be in particular half of the ultrasonic wavelength, so that a standing wave can form in the ultrasonic transducer.
  • the device can thus be designed as a ⁇ / 2 converter.
  • a connection between the first part and the second part of the sound-conducting element can in particular be between one sixteenth and three sixteenths of the wavelength ⁇ from the connection surface.
  • the term "wavelength ⁇ " is to be understood here as meaning the wavelength of the ultrasound in the material of the sound-conducting element (for example titanium).
  • the second part is also possible to design the second part as a thin plate-shaped attachment.
  • the connection is then only slightly removed from the contact surface.
  • this results in a significantly greater oscillation amplitude in the region of the connection.
  • a gap between the first and second part arise, and this is not desirable.
  • the design freedom would be severely limited in terms of the channel and the contact surface.
  • the first opening of the channel which may be arranged in the first part as already mentioned, may for example be approximately one quarter of the wavelength (in particular between 0.2 ⁇ and 0.3 ⁇ ) away from the connection surface, ie the first opening may be in particular in the middle Be arranged 20% of the length of the ultrasonic transducer.
  • the opening of the channel from a zero vibration level of the device ie the plane in which the amplitude of the oscillation is zero
  • the opening of the channel from a zero vibration level of the device ie the plane in which the amplitude of the oscillation is zero
  • a connection to a pump is only slightly loaded, which significantly reduces the risk of leaks in the connection between the channel and the pump reduced.
  • a power of the ultrasound generated by the ultrasound generator may be between 5W and 20W.
  • the amplitude of the ultrasound may be, for example, between 10 and 30 ⁇ m at the contact surface. An amplitude in this range is sufficient to induce cavitation in the case of liquids to be treated with a low-attenuation membrane, the amplitude still being sufficiently low in order to minimize wear in the region of the contact surface.
  • the first opening may be arranged in a side face that is substantially orthogonal to a radiation direction of the ultrasound generator.
  • a side surface is considered substantially orthogonal if its surface normal has an angle between 60 ° and 120 ° to the emission direction. In particular, the angle can be between 80 ° and 100 °.
  • the ultrasound system further includes a pump configured to generate a negative pressure and connected to the channel via the first opening.
  • the ultrasound system has a membrane resting against the contact surface as a flexible material. From such a membrane to be treated with ultrasound liquids to be surrounded.
  • the ultrasound system may include a power supply configured to supply the ultrasound generator - which may include a piezoelectric element as mentioned above - with a voltage for vibrational excitation of the ultrasound generator.
  • the ultrasound system can have a measuring device for determining the amplitude and / or intensity of the ultrasound generated. The measuring device can determine the amplitude and / or intensity in particular via the voltage of the second piezoelectric element.
  • a device 1 is shown in cross-section and in plan view.
  • the device 1 has a sound-conducting element 2, consisting of a first part 3 and a second part 4 (also referred to as ultrasonic suction foot). Furthermore, the device comprises an ultrasound generator 5 and a rear terminating element 6.
  • the closing element 6 is equipped with a receptacle 7 for a screw.
  • the first part of the Schallleitelements 2 in turn has a threaded bore 8, in which a screw 9, the head 10 is arranged in the closing element 6, is screwed.
  • the first part 2 furthermore has a screw-in opening 11 which is directed away from the ultrasound generator 5 and into which the second part 4 of the sound-conducting element 2 is screwed.
  • the second part 4 of the sound-conducting element 2 has a thread 12.
  • the second part 4 of the Schallleitelements 2 also has a contact surface 15 which is equipped with a circumferential O-ring 16 and is used for coupling the ultrasound in a flexible material.
  • a contact surface 15 is equipped with a circumferential O-ring 16 and is used for coupling the ultrasound in a flexible material.
  • an opening 17 is arranged, which communicates with a channel 18 in connection.
  • the channel 18 passes completely through the second part 4 of the sound-conducting element and at least partially through the first part 3.
  • the end facing away from the opening 17 of the channel 18 is disposed within the first part 3 of the Schallleitelements.
  • the channel 18 with a connecting piece 19 which has an opening 20, in conjunction.
  • a conventional hose can be pushed and fastened for example with a hose clamp.
  • the connecting piece 19 Via the connecting piece 19, the channel 18 can thus be connected to a pump (not shown) via which a negative pressure for sucking the flexible material against the contact surface 15 is applied.
  • the diameter of the channel 18 changes within the second part 4.
  • the geometry of the channel in the second part 4 thus influences the suction force on the contact surface.
  • a pump in particular a pulsation-free pump can be used.
  • the already mentioned ultrasonic generator 5 comprises a plurality of piezoelectric elements 21 to 24.
  • Two of the piezoelectric elements 21 and 22 are connected to a not shown Voltage source connected and set up to generate the ultrasound.
  • the two piezo elements 23 and 24, however, have no power supply but a signal tap, which is in communication with a measuring device, also not shown.
  • This measuring device can determine the amplitude and / or intensity of the ultrasound based on a voltage generated by the piezo elements 23 and 24 as a function of the present ultrasound amplitude.
  • the device 1 also has a flange 25 to which it can be attached.
  • the device 1 has a length, i. a total extent in the sound propagation direction x, which corresponds to half the wavelength of the ultrasound generated.
  • the device can thus be referred to as a ⁇ / 2 converter.
  • the ultrasonic generating apparatus 1 is set at a frequency of 30 kHz.
  • the sound conducting 2 is made of titanium and the end element 6 made of aluminum. The length of the device is thus a little over 17 cm.
  • the sound conducting 2 may be formed as shown in two parts or in one piece.
  • the first part 3, the second part 4, the entire sound-conducting element 2 and / or the end element 6 can also be formed of another metal of an alloy, a plastic or a ceramic instead of titanium.
  • the sound conducting element 2 may have a rotationally symmetrical cross section. However, a cross-section of the sound-conducting element 2 can also deviate from a rotationally symmetrical shape. For example, a triangular or quadrangular cross-section of the sound-conducting element 2 is
  • the suction surface 15 'as a detail of an alternative variant of a device 1 is shown.
  • the contact surface 15 ' is curved.
  • the curved, concave-shaped design of the contact surface 15 'no seal is required because the outer edge 26 of the contact surface 15' serves as a sealing edge.
  • the contact surface may also be convex, ie curved in the opposite direction.
  • the abutment surface can then be pressed against a flexible material (a membrane) to make a reliable contact and be connected via the opening 17 by means of negative pressure with the flexible material, so that the flexible material follows the movement of the abutment surface.
  • FIGS. 2a to 2d is the first part 3 of the Schallleitelements 2 of the device 1 from the FIGS. 1a and 1b shown in section and in supervision.
  • the two threaded holes 8 and 11 for connecting with the screws 10 and the second part 4 can be seen particularly well.
  • the first part has a tapering area 32 in which the cross section (ie the sectional area orthogonal to the direction x FIG. 1 ) From the ultrasonic generator 5 to the contact surface decreases, and a coupling region 33 in which the threaded bore 11 is arranged and thus serves the coupling to the second part 4.
  • the tapering region 32 serves to amplify the amplitude of the ultrasound, the gain being achieved by concentrating the ultrasound in the reduced cross-sectional area.
  • the ultrasonic generator 5 facing threaded hole 8 is in the detailed view Fig. 2b shown in more detail, while the second part 4 of the Schallleitelements 2 facing threaded bore 11 in the detailed view Fig. 2c is more accurate.
  • the flange 25, which can be used to attach the device 1, can be seen.
  • the second part 4 of the sound-conducting element is shown in detail.
  • the second part of the sound-conducting element has a groove 27 running around the abutment surface 15, which groove is used for fastening the O-ring 16 (cf. Fig. 1a ) serves.
  • the part 4 of the sound-conducting element has a tapered region 28, via which the amplitude of the ultrasound, which arrives at the contact surface 15, continues.
  • the tapering region 32 of the first part 3 there is thus an amplification of the amplitude at the abutment surface 15 with respect to the amplitude at the ultrasound generator 5 by a factor of 3 to 5.
  • the second part 4 of the sound-conducting element 2 is very easy to replace in order to prevent an operational failure Maintenance due to wear of the contact surface 15 is required to keep as short as possible.
  • the second part 4 can also be exchanged to an intensity of reaching the contact surface 15 To change ultrasound.
  • a built-in second part 4 of the sound-conducting element 2 can be exchanged for an alternative of the second part 4, which differs in terms of the cross-section in the region of the tapered region 28.
  • Fig. 4 the end element 6 is shown in section. As can be seen, the end element 6, the receptacle 7 for the screw head and a through hole for the shank of the screw 9.
  • Fig. 5 is the principal course 29 of the tensile stress and the principal course 30 of the oscillation amplitude over the length of the transducer 1 is applied.
  • the position of the contact surface 15 is marked on the X-axis.
  • the amplitude of the ultrasonic vibration in the region of the ends of the device 1 is maximum. For example, it can be between 20 and 30 microns.
  • the tension is the lowest at the ends.
  • the tensile stress is significantly greater, but the amplitude is very small.
  • the terminal 19 is arranged in the longitudinal direction (ie x-direction) of the transducer in the vibrational level, since there the amplitude is minimal.
  • the illustrated courses 29 and 30 are only schematic representations. The precise courses, which are influenced by the shape of the device 1 and in particular by the taper 28 and the tapering area 32, can be clearly different from the illustrated courses 29, 30.
  • FIGS. 6a and 6b shown in a sectional view and a plan view.
  • the embodiment differs only in that, instead of a terminating element 6 and an ultrasound generator 5, a continuous drive unit 31 is provided which contains an ultrasound generator and which can be screwed into the threaded hole 8 of the first part 3 of the Schallleitelements 2.
  • FIGS. 7a to 7c three different further embodiments of a contact surface 15 are shown in section and in a plan view.
  • contact surface has four distributed over the circumference, at 90 ° angles to each other arranged intake ports 34, which are each connected to the channel 18.
  • the channel is not performed up to the contact surface 15 as a central channel but divides into four connected to one of the openings each sub-channels 35.
  • the channel 18 may initially be partially introduced into the second part 4 from the side of the second part facing the first part 3 by drilling.
  • the introduced bore does not penetrate completely through the second part 4 and is thus formed as a blind hole.
  • the sub-channels 35 can then be introduced starting from the contact surface 15, such that they end in the lower end of the blind hole.
  • the variant off Figure 7a can also be modified to the effect that the channel 18 (in particular of reduced cross-section) is carried to the contact surface 15.
  • the suction ports 34 connected to the sub-channels 35 then act as additional suction points (in addition to a central opening 17 as seen in FIG FIG. 1 known) and improve uniformity of the pressure force of the membrane on the contact surface over the variant FIG. 1 ,
  • FIG. 7b has a continuous central channel 18, the same as in FIG. 1 is trained. Starting in a star-shaped manner from the opening 17, however, superficial channels 36 are incorporated into the contact surface 15. A height of the channels decreases here with increasing distance from the contact surface 15.
  • the variant off FIG. 7c also has a continuous channel 18 as shown FIG. 1 known on.
  • an annular channel 37 and connecting channels 38 are incorporated.
  • a plurality of annular channels 37 may be provided and also the number of connection channels 38 may be varied.
  • the variant off FIG. 7d also has a continuous channel 18. From this outgoing go from several main channels 39, which in turn branch off in hub channels 40. These in turn can branch out according to the principle of a self-similar structure, but this is not shown in the figure.
  • the main channels 39 as can be seen from the sectional view, have a greater height than the secondary channels 40.

Claims (14)

  1. Système à ultrasons comprenant :
    un dispositif (1) pour l'introduction de milieux liquides avec des ultrasons à travers un matériau flexible, ce dispositif comprenant :
    - un générateur d'ultrasons (5) pour la génération d'ultrasons et
    - un élément conducteur d'ultrasons (2) pour la conduction des ultrasons générés par le générateur d'ultrasons,
    et l'élément de conduction d'ultrasons (2) comprenant une surface d'appui (15) pour la sortie des ultrasons vers le matériau flexible,
    l'élément de conduction d'ultrasons (2) comprenant un canal (18) avec une première ouverture (20) pour l'application d'une dépression au canal (18) et d'une ouverture supplémentaire (17) pour l'application de la dépression au matériau flexible, et
    - une source de dépression qui est conçue pour la génération d'une dépression et qui est reliée avec le canal (18) ;
    - le système à ultrasons comprenant le matériau flexible appuyé contre la surface d'appui,
    les milieux liquides à traiter par ultrasons étant entourés par le matériau flexible, le matériau flexible appuyé contre la surface d'appui (15) étant une membrane.
  2. Système à ultrasons selon la revendication 1, caractérisé en ce que le générateur d'ultrasons (5) comprend au moins un élément piézo-électrique (21, 22, 23, 24), le générateur d'ultrasons (5) comprenant de préférence plusieurs éléments piézo-électriques (21, 22, 23, 24),
    - au moins un premier élément piézo-électrique (21, 22) étant connecté à une alimentation en tension pour la production d'oscillations du premier élément piézo-électrique et
    - au moins un deuxième élément piézo-électrique (23, 24) étant connecté à un dispositif de mesure pour la mesure des ultrasons traversant le deuxième élément piézo-électrique (23, 24).
  3. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que la deuxième ouverture (17) se trouve à l'intérieur de la surface d'appui (15).
  4. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que, au niveau de la surface d'appui (15) se trouve un élément d'étanchéité (16) entourant la surface d'appui (15) et/ou en ce que la surface d'appui (15') présente une forme concave pour la formation d'une arête d'étanchéité circulaire.
  5. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que l'élément de conduction des ultrasons (2) comprend au moins une zone effilée (28).
  6. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que l'élément de conduction des ultrasons (2) comprend au moins une première partie (3) reliée au générateur d'ultrasons (5) et une deuxième partie (4) comprenant la surface d'appui (15), les deux parties (3, 4) étant reliées entre elles, par exemple par vissage.
  7. Système à ultrasons selon la revendication 6, dans la mesure où celle-ci fait référence à la revendication 5, caractérisé en ce que la zone effilée (28) est disposée dans la deuxième partie (4) comprenant la surface d'appui (15).
  8. Système à ultrasons selon la revendication 6 ou 7, caractérisé en ce que le canal (18) traverse la première et la deuxième parties (3, 4) de l'élément de conduction des ultrasons (2) au moins partiellement, la première ouverture (20) du canal étant disposée dans la première partie (3) et la deuxième ouverture (17) du canal étant disposée dans la deuxième partie (4).
  9. Système à ultrasons selon l'une des revendications précédentes, comprenant un élément de terminaison (6) qui constitue l'extrémité du dispositif opposée à la surface d'appui (15).
  10. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que la première partie (3) est constitué d'un matériau différent de la deuxième partie (4) et/ou de l'élément de terminaison (6).
  11. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que le générateur d'ultrasons (5) est conçu pour la génération d'ultrasons avec une fréquence entre 20 kHz et 100 kHz, par exemple une fréquence entre 30 kHz et 40 kHz.
  12. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que la première ouverture (20) du canal (18) est disposée dans une face latérale de l'élément de conduction des ultrasons, orientée globalement perpendiculairement à une direction d'émission du générateur d'ultrasons.
  13. Système à ultrasons selon l'une des revendications précédentes, caractérisé en ce que la source de dépression est une pompe.
  14. Système à ultrasons selon l'une des revendications précédentes, comprenant plusieurs deuxièmes parties (4), interchangeables entre elles, de l'élément de conduction d'ultrasons (2), les deuxièmes parties (4) interchangeables entre elles se distinguant en ce qui concerne une surface de section au niveau du rétrécissement (28) et/ou en ce qui concerne la surface d'appui (15).
EP13189307.5A 2012-10-25 2013-10-18 Dispositif de sollicitation de fluides liquides avec des ultrasons via une membrane et système à ultrasons Active EP2743919B1 (fr)

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DE102013211593A1 (de) * 2013-06-20 2014-12-24 Robert Bosch Gmbh Umfeldsensiereinrichtung mit modularem Ultraschallwandler, und Kraftfahrzeug mit einer derartigen Umfeldsensiereinrichtung
DE102015109451A1 (de) 2015-06-14 2016-12-15 Charles Rizk Sonotrodenvorrichtung und Gerät für akustische Levitation sowie Steuerungseinrichtung bzw. -verfahren dafür
JP7210851B2 (ja) * 2018-09-28 2023-01-24 株式会社ニデック 超音波眼圧計、および超音波アクチュエータ
CN114798292A (zh) * 2022-06-10 2022-07-29 杭州泛索能超声科技有限公司 一种适用于全方位手机壳喷涂的超声波精密喷涂设备

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EP1387808A1 (fr) * 2001-05-04 2004-02-11 Robert Bosch Gmbh Dispositif pour saisir et tenir un objet sans contact
DE102004025836B3 (de) * 2004-05-24 2005-12-22 Dr. Hielscher Gmbh Verfahren und Vorrichtung zum Einbringen von Ultraschall in ein fließfähiges Medium
EP2090370A1 (fr) * 2008-02-13 2009-08-19 L'oreal Dispositif de pulvérisation d'un produit cosmétique avec soufflage d'air chaud ou froid
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WO2012028696A1 (fr) * 2010-09-02 2012-03-08 Dr. Hielscher Gmbh Dispositif et procédé de nébulisation ou d'atomisation de matériaux coulants

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DE202012010508U1 (de) 2012-11-12
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