EP0341505A2 - Dispositif à ultrasons - Google Patents

Dispositif à ultrasons Download PDF

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Publication number
EP0341505A2
EP0341505A2 EP89107664A EP89107664A EP0341505A2 EP 0341505 A2 EP0341505 A2 EP 0341505A2 EP 89107664 A EP89107664 A EP 89107664A EP 89107664 A EP89107664 A EP 89107664A EP 0341505 A2 EP0341505 A2 EP 0341505A2
Authority
EP
European Patent Office
Prior art keywords
sound
retaining ring
wall
ultrasonic
liquid
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.)
Withdrawn
Application number
EP89107664A
Other languages
German (de)
English (en)
Other versions
EP0341505A3 (fr
Inventor
Martin Walter
Dieter Weber
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.)
Martin Walter Ultraschalltechnik GmbH
Original Assignee
Martin Walter Ultraschalltechnik 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 Martin Walter Ultraschalltechnik GmbH filed Critical Martin Walter Ultraschalltechnik GmbH
Publication of EP0341505A2 publication Critical patent/EP0341505A2/fr
Publication of EP0341505A3 publication Critical patent/EP0341505A3/fr
Withdrawn legal-status Critical Current

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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
    • B06B1/0618—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 of piezo- and non-piezoelectric elements, e.g. 'Tonpilz'
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • 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
    • G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys

Definitions

  • the invention relates to a device for introducing ultrasonic vibrations into a liquid by means of ultrasonic vibrators, which are arranged on the bottom (of the wall) of a liquid container and, as a lambda / 2 vibrator, consist of two piezoelectric plates oscillating in push-pull, one of which are connected on the one hand with a sound-emitting cone and on the other hand with a counterweight.
  • Devices of this type are required in particular for ultrasonic cleaning, the high tensile and compressive forces occurring in an ultrasound-excited liquid bath, in particular the mechanism of cavitation, effecting very good cleaning of the immersed workpieces.
  • the introduction of the ultrasonic vibrations is effected in known devices of this type in that the ultrasonic vibrators are glued with their sound-emitting cone onto a wall or the bottom of such a liquid container and thereby set this wall or the bottom into vibrations which in turn apply these vibrations the liquid passes on.
  • Such cleaning baths have proven particularly useful for workpieces of complex shapes, but are also used with advantage in precision mechanical units.
  • the workpieces to be cleaned or the workpieces on which the ultrasonic vibrations are supposed to act are only exposed to these ultrasonic vibrations for a short period of time.
  • the cavitation effect can therefore be metered through this period.
  • this does not apply to the wall of the liquid container, which is constantly exposed to cavitation.
  • This leads to "cavitation pitting", which leads to the container wall becoming leaky after some time.
  • the cavitation pitting is of course particularly noticeable on the wall on which the ultrasound transmitter is attached.
  • This wall acts as a sound-transmitting membrane, so it must transmit all the forces that ultimately lead to cavitation.
  • moisture reaches the ultrasound transducers glued to the wall, which loosens these ultrasound transducers and thus destroys the system.
  • a thicker membrane which would delay this cavitation pitting, cannot be used, since with the thickness of the membrane, the sound output or the efficiency of the entire device decreases significantly.
  • the object of the invention is to provide a device which avoids this cavitation pitting on the liquid container walls or the membrane. This is achieved in the manner according to the invention in that the ultrasonic vibrators are held by means of a retaining ring which is connected near the piezoelectric plate to the sound-emitting cone and that they are held by means of this retaining ring are inserted into the liquid container directly or via a sleeve surrounding the counterweight.
  • the ultrasonic transmitters with their sound-emitting cone glued to a wall, the membrane, of the liquid container, but they are inserted into the liquid container so that the sound-emitting cone protrudes directly into the liquid.
  • the cavitation that then naturally occurs will now not remove the membrane or the wall of the liquid container, but the sound-emitting cone.
  • the sound-emitting cone is made of solid metal, so that the abrasion caused by the cavitation on the sound-emitting cone is negligible in practice.
  • This special mounting of the ultrasound transmitter is possible in that an oscillation node is formed in the piezoelectric plates with the oscillation amplitude zero; the maximum vibration amplitude results from the front surface of the sound-emitting cone.
  • the retaining ring is attached to the base of the sound-emitting cone, where it lies against the piezoelectric plate, then this retaining ring is still close to the node, i.e. at a point where the sound-emitting cone is only with ge ringer vibration amplitude vibrates. This retaining ring is thereby also caused to vibrate, but with a very slight amplitude, so that there is hardly any fear of cavitation. However, the desired sound transmission to the liquid is practically not impaired, since this now takes place directly via the sound-emitting cone.
  • the sound-radiating cone is made of corrosion-resistant material.
  • the ultrasound transmitter can be inserted in the manner according to the invention in that the sound-emitting cone, as prescribed according to the invention, is inserted near the piezoelectric plate into the container wall, which then serves as a "holder", or is welded to the container wall at this point.
  • a retaining ring already welded to the sound-emitting cone can also be welded into the container wall as part of this wall.
  • the retaining ring can also be made in one piece with the sound-emitting cone.
  • the counterweight is surrounded by a sleeve which can be closed by a bottom on the underside except for an opening for the transducer feed lines.
  • This provides a device that can be screwed onto the inner wall of the liquid container by a screw connection that seals at the bottom, so that the entire ultrasonic oscillator is sealed in the liquid and can act directly on the liquid.
  • This device also has the advantage that if an ultrasonic oscillator fails, it is not difficult to replace this oscillator.
  • the two piezoelectric plates (1, 2) are connected on the one hand a counterweight (4) and on the other hand a sound-emitting cone (5). All these parts are held together by means of a screw (6).
  • a retaining ring (7) is screwed onto the sound-emitting cone (5), which is used to insert the ultrasonic vibrator into a liquid container.
  • This retaining ring can be welded into the ultrasonic container or otherwise attached to it so that the sound-emitting cone (5) protrudes into the liquid.
  • the container wall it is also possible to provide the container wall with an opening which permits welding in accordance with the connection through the retaining ring (7).
  • Fig. 2 shows the same transducer inserted in a sleeve (8).
  • the same fastening of the sound-emitting cone (5) can be found by means of a comprehensive retaining ring (17), which in this illustration is integrally connected to the bushing (8).
  • the bushing (8) encloses the entire remaining part of the ultrasonic vibrator and is closed on the underside by a base (9) with a screw connection (10).
  • the screw connection (10) not only leads to the ultrasound passed vibrator, but it is also the entire ultrasonic vibrator attached to a container inner wall with the interposition of a seal.
  • the transducer can also be easily replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP89107664A 1988-05-10 1989-04-27 Dispositif à ultrasons Withdrawn EP0341505A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815925A DE3815925C1 (fr) 1988-05-10 1988-05-10
DE3815925 1988-05-10

Publications (2)

Publication Number Publication Date
EP0341505A2 true EP0341505A2 (fr) 1989-11-15
EP0341505A3 EP0341505A3 (fr) 1990-08-22

Family

ID=6354058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107664A Withdrawn EP0341505A3 (fr) 1988-05-10 1989-04-27 Dispositif à ultrasons

Country Status (3)

Country Link
EP (1) EP0341505A3 (fr)
DE (1) DE3815925C1 (fr)
FI (1) FI99089C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479070A3 (en) * 1990-09-21 1992-04-15 Ettore Alagna Mounting arrangement of an ultrasound transducer onto a washing tank
EP0342446B1 (fr) * 1988-05-14 1993-09-01 Martin Walter Ultraschalltechnik GmbH Dispositif à ultrasons
WO2005044509A1 (fr) * 2003-11-06 2005-05-19 Kazumasa Ohnishi Table vibratoire
CN103331251A (zh) * 2013-06-04 2013-10-02 常州大学 一种在强酸性环境中使用的超声波换能器
KR102129692B1 (ko) * 2019-01-23 2020-07-02 박상부 세척용 진동자 유닛

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843110C1 (fr) * 1988-12-21 1990-02-22 Gruenbeck Wasseraufbereitung Gmbh, 8884 Hoechstaedt, De
DE4035828C2 (de) * 1990-11-10 2000-02-24 Funk Und Fernsehservice Haerin Überwachungsverfahren bei Ultraschallwandlern
DE4436054C2 (de) * 1994-10-10 1997-04-03 Wimmer Ulrich Dipl Ing Fh Einrichtung, insbesondere Resonator, zum Abstrahlen von Ultraschall
DE19836194C1 (de) * 1998-08-10 1999-12-30 Basf Ag Ultraschallwandler mit Schutzkappen
RU2175274C1 (ru) * 2001-01-05 2001-10-27 Закрытое акционерное общество "Завод РЭЛТЕК" Установка ультразвуковой очистки
RU2181635C1 (ru) * 2001-06-13 2002-04-27 Закрытое акционерное общество "РЭЛТЕК" Установка ультразвуковой очистки
RU2188085C1 (ru) * 2001-06-13 2002-08-27 Закрытое акционерное общество "РЭЛТЕК" Установка ультразвуковой очистки
DE102007023387A1 (de) 2007-05-18 2008-11-20 Robert Bosch Gmbh Verfahren zur Reinigung von Oberflächen eines Werkstückes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1129615A (fr) * 1955-07-29 1957-01-23 Realisations Ultrasoniques Sa Dispositif de transmission d'ondes élastiques d'un milieu solide à un milieu liquide
US2910390A (en) * 1956-06-29 1959-10-27 Hermes Sonic Corp Machine for cleaning small parts
US3331589A (en) * 1965-02-08 1967-07-18 Frederick G Hammitt Vibratory unit with seal
DE1597015A1 (de) * 1967-04-21 1970-06-11 Vsesojuznyjnaucno I I Tokov Vy Einrichtung zur Ausstrahlung von Schall- und Ultraschallschwingungen in fluessigen Medien
US3561734A (en) * 1969-01-02 1971-02-09 Blackstone Corp Transducer mountings and methods
US3885172A (en) * 1971-12-01 1975-05-20 Continental Can Co Sonic transducer
JPS562478Y2 (fr) * 1974-08-30 1981-01-20
DE7929243U1 (de) * 1979-10-16 1984-06-28 Steckmann, Helge G., 6380 Bad Homburg Geraet zum reinigen von gut, insbesondere von zahnprothesen
DE2941748A1 (de) * 1979-10-16 1981-04-30 Helge G. 6380 Bad Homburg Steckmann Geraet zum reinigen von gut, insbesondere von zahnprothesen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0342446B1 (fr) * 1988-05-14 1993-09-01 Martin Walter Ultraschalltechnik GmbH Dispositif à ultrasons
EP0479070A3 (en) * 1990-09-21 1992-04-15 Ettore Alagna Mounting arrangement of an ultrasound transducer onto a washing tank
WO2005044509A1 (fr) * 2003-11-06 2005-05-19 Kazumasa Ohnishi Table vibratoire
CN103331251A (zh) * 2013-06-04 2013-10-02 常州大学 一种在强酸性环境中使用的超声波换能器
KR102129692B1 (ko) * 2019-01-23 2020-07-02 박상부 세척용 진동자 유닛

Also Published As

Publication number Publication date
EP0341505A3 (fr) 1990-08-22
DE3815925C1 (fr) 1989-04-20
FI892226A0 (fi) 1989-05-09
FI892226L (fi) 1989-11-11
FI99089B (fi) 1997-06-30
FI99089C (fi) 1997-10-10

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