EP0980062A2 - Ultraschallwandler mit Schutzkappen - Google Patents
Ultraschallwandler mit Schutzkappen Download PDFInfo
- Publication number
- EP0980062A2 EP0980062A2 EP99115091A EP99115091A EP0980062A2 EP 0980062 A2 EP0980062 A2 EP 0980062A2 EP 99115091 A EP99115091 A EP 99115091A EP 99115091 A EP99115091 A EP 99115091A EP 0980062 A2 EP0980062 A2 EP 0980062A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- space
- sound
- protective cap
- 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- Withdrawn
Links
Images
Classifications
-
- 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 emitting sound energy into a Fluid that contains one or more transducers within Protective caps.
- Devices of the type mentioned are used in particular in ultrasonic cleaning systems used.
- the Sound transducer generates high-frequency electrical energy from it longitudinal sound waves.
- the generated by the transducer Longitudinal vibrations are partly in the resonator in transverse vibrations converted so that ultrasonic energy in both the longitudinal direction of the resonator is also radiated in the radial direction.
- the transducer must be in front direct contact with the liquid to be protected as such contact would cause the transducer to malfunction.
- EP-B 0 455 837 describes a device for emitting ultrasonic energy known in a liquid in which the two ends of a tubular or rod-shaped Resonators are each connected to an ultrasonic transducer.
- the transducers are encapsulated there, that is, they are in protective caps, which are intended to protect the transducers against the ingress of liquid.
- the invention has for its object a device of the introduction Way of creating in which the penetration of liquid is avoided more safely or liquid that has already penetrated is removed.
- One solution to the problem is a device for blasting Sound energy in a liquid containing at least one sound transducer is completely or partially surrounded by a protective cap.
- the device has means for supplying gas into the intermediate space Sound transducer and protective cap on.
- the device also has means for Has removal of the gas. Liquid that has already penetrated or condensed can then be removed in that the gas the space between Flows through the sound transducer and protective cap at times or continuously.
- the Device can advantageously be designed so that the first Intermediate gas discharged supplied to at least one other space becomes. In this way, gas is supplied to more than one Sound transducer only needed a single line.
- two Sound transducers connected to the same sound-emitting element can Removal of the gas from the first space and the supply of the gas into a second space advantageously through a cavity, e.g. a Drill hole in the sound radiating element.
- the supply of electrical energy to the transducer can be through a line to The gas is fed through.
- the electrical lines protected from contact with the liquid and from other external influences. If there is a line to discharge the gas, the supply can be electrical energy also take place through this line.
- the device can include means for monitoring the gas pressure and / or of the gas volume flow. Such means enable the detection of Leaks if this leads to a reduction in gas pressure or to a Increase the gas volume flow.
- Such a device is advantageously operated in such a way that the supplied gas has a higher pressure than the surrounding liquid. On in this way, even if leaks occur, an intrusion of Avoided liquid.
- each of the sound transducers 1a, 1b is of one Surround protective cap 2a, 2b.
- a sealing ring 3a, 3b between the protective cap and sound-emitting element seals the space between the Transducer and the protective cap against the ingress of liquid.
- About one Hose 4a and an opening in the protective cap 2a becomes the gap
- a gas 10 is supplied between the sound transducer 1a and the protective cap 2a. The gas also enters through a bore 5 in the sound-radiating element 6 the space between the sound transducer 1b and the protective cap 2b. Of there it is through an opening in the protective cap 2b and another hose 4b removed again.
- the lines 8 are also to Supply of the electrical energy required to operate the transducers guided.
- the protective caps 2a, 2b preferably consist of light, vibration-resistant Materials such as tantalum or titanium.
- the hoses 4a, 4b can e.g. out Polytetrafluoroethylene (PTFE) exist for mechanical protection and Protection against electrostatic charges additionally from a metal mesh can be encased.
- Hoses are rigid as supply and discharge lines Connections, e.g. Metal pipes, preferable, because it connects to the Protective caps, which usually vibrate to a considerable extent, hold more securely are.
- the gas 10 supplied is preferably nitrogen or an inert gas. It can however, other gases or mixtures of gases can also be used, provided they the materials with which they come into contact in the device do not affect negatively, e.g. corrode.
- the pressure of the gas supplied is chosen higher than the pressure of the surrounding liquid. As a result, leaks will escape Gas into the liquid; conversely, liquid penetration into the Avoid space between the transducers and the protective caps. Any liquid that has already penetrated or condensed in the space is removed by continuously flowing the gas through it.
- the is preferred Pressure of the gas supplied is not higher than about 100 mbar above the pressure of the surrounding liquid chosen, since then the seals 3a, 3b are not unnecessary be charged.
- Fig. 2 two devices 13a, 13b according to Fig. 1 are in a liquid bath shown.
- a flow meter 11 each of the devices is the gas 10 fed.
- the gas discharged from the devices 13a, 13b becomes one supplied gastight junction box 12 and from there into a not shown Exhaust pipe directed. If air is selected as gas 10, the exhaust pipe can omitted.
- the lines 8 are also to Supply of the electrical energy required to operate the transducers led outside.
- connection box 12 The gas connections in the connection box 12 are designed so that they the gas 10th oppose a high flow resistance and in this way the limit the discharged gas volume flow. If between the flow meters 11 and the junction box 12 gas escapes due to a leak one of the flow meters 11 indicate an increased gas volume flow, because of which the leak can be detected.
- the gas volume flow can of the derived gas may also be limited in that the hoses 4b by a almost complete filling with electrical lines to remove the gas oppose high flow resistance.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims (10)
- Vorrichtung zum Abstrahlen von Schallenergie in eine Flüssigkeit, enthaltend mindestens einen Schallwandler, der vollständig oder teilweise von einer Schutzkappe umgeben ist, dadurch gekennzeichnet, daß die Vorrichtung Mittel (4a) zur Zuführung von Gas in den Zwischenraum zwischen Schallwandler (1a, 1b) und Schutzkappe (2a, 2b) aufweist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie zusätzlich Mittel (4b) zur Abführung des Gases aufweist.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß sie Mittel aufweist, das aus einem ersten Zwischenraum abgeführte Gas mindestens einem weiteren Zwischenraum zuzuführen.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Abführung des Gases aus dem ersten Zwischenraum und die Zuführung des Gases in einen zweiten Zwischenraum durch einen Hohlraum (5) in einem schallabstrahlenden Element (6) hindurch erfolgt.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Zuführung (8) elektrischer Energie zum Schallwandler (1a, 1b) durch eine Leitung (4a) zur Zuführung des Gases erfolgt.
- Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Zuführung (8) elektrischer Energie zum Schallwandler (1a,1b) durch eine Leitung (4b) zur Abführung des Gases erfolgt.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie Mittel zur Überwachung des Gasdrucks aufweist.
- Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie Mittel (11) zur Überwachung des Gasvolumenstroms aufweist.
- Verfahren zum Betrieb einer Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das zugeführte Gas einen höheren Druck als die die Vorrichtung umgebende Flüssigkeit aufweist.
- Verfahren zum Betrieb einer Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das Gas den Zwischenraum zwischen Schallwandler und Schutzkappe zeitweise oder ständig durchströmt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998136194 DE19836194C1 (de) | 1998-08-10 | 1998-08-10 | Ultraschallwandler mit Schutzkappen |
| DE19836194 | 1998-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0980062A2 true EP0980062A2 (de) | 2000-02-16 |
| EP0980062A3 EP0980062A3 (de) | 2003-01-02 |
Family
ID=7877081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99115091A Withdrawn EP0980062A3 (de) | 1998-08-10 | 1999-08-06 | Ultraschallwandler mit Schutzkappen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0980062A3 (de) |
| DE (1) | DE19836194C1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829293A (ja) * | 1981-08-14 | 1983-02-21 | Hitachi Ltd | 水中送波装置 |
| DE3815925C1 (de) * | 1988-05-10 | 1989-04-20 | Martin Walter Ultraschalltechnik Gmbh, 7516 Karlsbad, De | |
| ES2031398T3 (es) * | 1990-03-09 | 1992-12-01 | Martin Walter Ultraschalltechnik Gmbh | Resonador ultrasonico. |
| US5377709A (en) * | 1992-10-22 | 1995-01-03 | Shibano; Yoshihide | Ultrasonic vibrator device for ultrasonically cleaning workpiece |
-
1998
- 1998-08-10 DE DE1998136194 patent/DE19836194C1/de not_active Expired - Fee Related
-
1999
- 1999-08-06 EP EP99115091A patent/EP0980062A3/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE19836194C1 (de) | 1999-12-30 |
| EP0980062A3 (de) | 2003-01-02 |
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