EP1062057B1 - Method for activating a sieve frame with ultrasounds - Google Patents
Method for activating a sieve frame with ultrasounds Download PDFInfo
- Publication number
- EP1062057B1 EP1062057B1 EP99915549A EP99915549A EP1062057B1 EP 1062057 B1 EP1062057 B1 EP 1062057B1 EP 99915549 A EP99915549 A EP 99915549A EP 99915549 A EP99915549 A EP 99915549A EP 1062057 B1 EP1062057 B1 EP 1062057B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sieve
- frame
- vibrations
- sieve frame
- ultrasound
- 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.)
- Expired - Lifetime
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/54—Cleaning with beating devices
Definitions
- the invention relates to a method for exciting a Screen frame with ultrasound according to the preamble of Claim 1.
- the known ultrasonic screening devices and screening processes consist essentially of a sieve frame with an applied sieve surface and one to the sieve frame via an ultrasonic transducer coupled ultrasound source, the transducer high frequency electrical vibrations in mechanical Converts bending vibrations.
- the ultrasonic transducer is one of the screen surfaces adjacent resonator assigned to the resonance of the ultrasonic transducer and tuned in by the latter Bending vibrations are displaceable.
- the one from the transducer generated longitudinal vibrations are in the tangential to the longitudinal direction of vibration arranged resonator bars in bending vibrations of the transformed at the same frequency.
- FR-A-2682050 describes a method for excitation a screen frame with ultrasound known, in which the Vibration of the sieve by means of a screw Sonotrode attached directly under the frame.
- the frame is used to transmit vibrations onto the sieve, the direction of vibration of the Ultrasonic transducer at right angles or radially on the The frame works and forms a bending oscillator.
- a screening device is known from US-A-4062768, in which one excited by an ultrasonic transducer Frame is inserted under a screen mesh.
- the Ultrasound transducer excites the frame in the plane Screen area.
- the frame works because of its length and also in that by the ultrasonic transducer excited frame perpendicular to the excitation direction of the Converter and coupling element is available as Bending vibrator.
- a disadvantage of all known embodiments is that from the oscillation principle "bending vibrator" resulting large dimensions are not sufficient enable compact design of the screening device.
- the object of the invention is a method for excitation of screen frames using ultrasound which is a more compact design of screening devices than previously known is guaranteed.
- the invention is in one Embodiment of an annular sieve frame explained in more detail.
- the single figure is in one schematic representation of the annular sieve frame represented with the ultrasound source.
- the coupling element 2 consists of two ⁇ / 2 longitudinal oscillators 3, in their amplitude maximum are interconnected.
- a vibrating system 4 that generates the ultrasound (Ultrasonic transducer) is on as a ⁇ / 2 longitudinal oscillator the lower ⁇ / 2 longitudinal oscillator 3 of the coupling element 2 attached.
- the high-frequency generated by the ultrasonic transducer 4 mechanical longitudinal vibrations are over the Transfer coupling element 2 to a sieve frame 1, plant over the entire circumference according to the Diagram II of the figure continues and will spread evenly transfer the screen fabric (not shown).
- Diagram I of the figure shows the course of oscillation in transducer 4 and in coupling element 2.
- Diagram II shows the course of oscillation in sieve frame 1, the amplitude quantity a being plotted over the location of vibration x in both diagrams I, II of the figure. There is a vibration node at each location x 0 .
- the invention is not limited to that described here Embodiments limited. Rather, it is possible by combining the features more Realize embodiments without the frame to leave the invention. So it is also an advantage conceivable a longitudinal oscillation movement after the Invention with a bending vibrator movement known Way to combine on a sieve frame.
Description
Die Erfindung betrifft ein Verfahren zum Anregen eines Siebrahmens mit Ultraschall gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for exciting a Screen frame with ultrasound according to the preamble of Claim 1.
Es ist allgemein bekannt, zum Sieben unterschiedlichster Güter Ultraschall zu verwenden. Die durch den Ultraschall erzeugten schwingenden Bewegungen werden auf die Siebfläche übertragen und üben einen günstigen Einfluß auf den Siebdurchsatz und das Siebgut aus. Die auf das Siebgut übertragenen Schwingungen bewirken eine Reduzierung der Oberflächenspannung und der Aglomerierungskräfte, so daß ein Verstopfen der Siebmaschen weitestgehend verhindert wird.It is common knowledge to sieve the most varied Goods to use ultrasound. The through the Ultrasonic vibrations are generated transferred to the screen surface and practice a cheap one Influence on the throughput and the material to be screened. The vibrations transmitted to the screenings cause a Reduction of surface tension and agglomeration forces, so that the meshes become blocked is largely prevented.
Die bekannten Ultraschall verwendenden Siebvorrichtungen und Siebverfahren bestehen im wesentlichen aus einem Siebrahmen mit einer aufgebrachten Siebfläche und einer an den Siebrahmen über einen Ultraschallwandler angekoppelten Ultraschallquelle, wobei der Wandler die hochfrequenten elektrischen Schwingungen in mechanische Biegeschwingungen umwandelt.The known ultrasonic screening devices and screening processes consist essentially of a sieve frame with an applied sieve surface and one to the sieve frame via an ultrasonic transducer coupled ultrasound source, the transducer high frequency electrical vibrations in mechanical Converts bending vibrations.
In der WO 94/27748 werden eine Vorrichtung und ein Verfahren zum Sieben, Klassieren, Sichten, Filtern oder Sortieren von Stoffen mit in einem Siebrahmen vorgesehener Siebfläche und dieser zugeordnetem Ultraschall-Wandler, durch den der Siebfläche Schwingungen zuleitbar sind, beschrieben.In WO 94/27748 a device and a Methods for screening, classifying, sifting, filtering or Sorting fabrics with in a sieve frame provided screen area and assigned Ultrasonic transducer through which the screen surface Vibrations are lead described.
Dem Ultraschallwandler ist ein der Siebfläche anliegender Resonator zugeordnet, der auf die Resonanz des Ultraschallwandlers abgestimmt und von letzterem in Biegeschwingungen versetzbar ist. Die vom Schallwandler erzeugten Longitudinalschwingungen werden in den tangential zur longitudinalen Schwingrichtung angeordneten Resonatorstäben in Biegeschwingungen der gleichen Frequenz umgeformt.The ultrasonic transducer is one of the screen surfaces adjacent resonator assigned to the resonance of the ultrasonic transducer and tuned in by the latter Bending vibrations are displaceable. The one from the transducer generated longitudinal vibrations are in the tangential to the longitudinal direction of vibration arranged resonator bars in bending vibrations of the transformed at the same frequency.
Aus der FR-A-2682050 ist ein Verfahren zum Anregen eines Siebrahmens mit Ultraschall bekannt, bei dem die Schwingung des Siebes durch eine mittels einer Schraube direkt unter dem Rahmen angebrachte Sonotrode erfolgt. Der Rahmen dient dabei der Übertragung von Schwingungen auf das Sieb, wobei die Schwingungsrichtung des Ultraschallwandlers rechtwinklig bzw. radial auf den Rahmen wirkt und einen Biegeschwinger bildet.FR-A-2682050 describes a method for excitation a screen frame with ultrasound known, in which the Vibration of the sieve by means of a screw Sonotrode attached directly under the frame. The frame is used to transmit vibrations onto the sieve, the direction of vibration of the Ultrasonic transducer at right angles or radially on the The frame works and forms a bending oscillator.
Aus der US-A-4062768 ist eine Siebeinrichtung bekannt, bei der ein durch einen Ultraschallwandler angeregter Rahmen unter einem Siebgewebe eingesetzt ist. Der Ultraschallwandler regt den Rahmen in der Ebene der Siebfläche an. Der Rahmen wirkt aufgrund seiner Länge und auch dadurch, daß der durch den Ultraschallwandler angeregte Rahmen rechtwinklig zur Anregungsrichtung des Wandlers und Kupplungselementes steht, als Biegeschwinger.A screening device is known from US-A-4062768, in which one excited by an ultrasonic transducer Frame is inserted under a screen mesh. The Ultrasound transducer excites the frame in the plane Screen area. The frame works because of its length and also in that by the ultrasonic transducer excited frame perpendicular to the excitation direction of the Converter and coupling element is available as Bending vibrator.
Nachteilig ist bei allen bekannten Ausführungsformen, daß die aus dem Anschwingungsprinzip "Biegeschwinger" sich ergebenden großen Abmessungen keine ausreichend kompakte Bauform der Siebvorrichtung ermöglichen.A disadvantage of all known embodiments is that from the oscillation principle "bending vibrator" resulting large dimensions are not sufficient enable compact design of the screening device.
Aufgabe der Erfindung ist es, ein Verfahren zum Anregen von Siebrahmen mittels Ultraschall zu entwickeln, mit welchem eine kompaktere Bauart von Siebvorrichtungen als bisher bekannt gewährleistet wird.The object of the invention is a method for excitation of screen frames using ultrasound which is a more compact design of screening devices than previously known is guaranteed.
Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Anspruchs 1. Danach wird der Siebrahmen über ein Koppelelement, welches aus mindestens zwei in ihrem Amplitudenmaximum gekoppelten parallelen Längsschwingern gebildet wird und welches die Anregungsachse des schwingenden Systems in die Ebene des die Schwingungen übertragenden Siebrahmens verlagert, als Längsschwinger angeregt.The solution to this problem results from the features of claim 1. Then the screen frame over a Coupling element, which consists of at least two in their Amplitude maximum coupled parallel longitudinal transducers is formed and which is the excitation axis of the vibrating system in the plane of the vibrations transferring sieve frame, as a longitudinal oscillator stimulated.
Zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are in the Subclaims specified.
Die Anregung eines Siebrahmens mit Ultraschall als Längsschwinger in der nach der Erfindung beschriebenen Art gewährleistet eine flachere und damit kompaktere Bauart von Siebrahmen als nach dem Biegeschwingerprinzip oder nach anderen Anregungsformen mit senkrecht zur Siebfläche stehendem Schallwandler angeregte Siebvorrichtungen.The excitation of a screen frame with ultrasound as Longitudinal transducer in the described according to the invention Art ensures a flatter and therefore more compact Type of sieve frame as on the bending vibrator principle or according to other forms of excitation with vertical to the screen surface of the sound transducer Screening devices.
Insbesondere durch die Anbringung des schwingenden Systems an das mit den Schwingungen anzuregende Element (zum Beispiel Siebrahmen) mit einem seitlichen Versatz kann eine kompakte Bauform dadurch erreicht werden, daß das schwingende System unter dem Siebrahmen angeordnet wird. Es ist des weiteren die Ausbildung von Ringformen (auch elliptische Formen) für den Siebrahmen möglich, insbesondere wenn durch ein Koppelelement die Anregungsachse des schwingenden Systems in die Ebene des die Schwingungen übertragenden Siebrahmens verlagert wird.In particular by attaching the vibrating Systems to the element to be excited with the vibrations (e.g. sieve frame) with a lateral offset a compact design can be achieved in that the vibrating system is placed under the sieve frame becomes. It is also the formation of ring shapes (also elliptical shapes) possible for the sieve frame, especially if by a coupling element Excitation axis of the vibrating system in the plane of the screen frame transmitting the vibrations is shifted.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel eines ringförmigen Siebrahmens näher erläutert. In der einzigen Fig. ist in einer schematischen Darstellung der ringförmige Siebrahmen mit der Ultraschall-Quelle dargestellt.The invention is in one Embodiment of an annular sieve frame explained in more detail. In the single figure is in one schematic representation of the annular sieve frame represented with the ultrasound source.
Entsprechend der Darstellung in der Fig. ist ein
kreisförmiger Siebrahmen 1 aus einem ganzzahligen
Vielfachen von λ /2-Elementen gebildet, wobei eines
der λ /2-Elemente durch ein Koppelelement 2 gebildet
ist.As shown in the figure is a
circular sieve frame 1 from an integer
Multiples of λ / 2 elements, one being
the λ / 2 elements are formed by a
Das Koppelelement 2 besteht aus zwei λ /2-Längsschwingern
3, die in ihrem Amplitudenmaximum
miteinander verbunden sind.The
Ein den Ultraschall erzeugendes schwingendes System 4
(Ultraschall-Wandler) ist als λ /2-Längsschwinger an
dem unteren λ /2-Längsschwinger 3 des Koppelelmmentes
2 angebracht.A vibrating system 4 that generates the ultrasound
(Ultrasonic transducer) is on as a λ / 2 longitudinal oscillator
the lower λ / 2
Die vom Ultraschall-Wandler 4 erzeugten hochfrequenten
mechanischen Längs-Schwingungen werden über das
Koppelelement 2 auf einen Siebrahmen 1 übertragen,
pflanzen sich über den gesamten Umfang entsprechend dem
Diagramm II der Figur fort und werden gleichmäßig auf
das Siebgewebe (nicht dargestellt) übertragen. The high-frequency generated by the ultrasonic transducer 4
mechanical longitudinal vibrations are over the
Bei großen Siebflächen kann es zweckmäßig sein, mehrere, in Abhängigkeit von der Geometrie der Siebfläche, kreisförmige, elliptische oder stabförmige Siebrahmen 1 unter der Siebfläche anzuordnen, um eine effektive Siebfunktion zu gewährleisten.With large screen areas, it can be useful several, depending on the geometry of the Sieve surface, circular, elliptical or rod-shaped Arrange screen frame 1 under the screen area to a to ensure effective sieving function.
Das Diagramm I der Figur zeigt den Schwingungsverlauf
im Wandler 4 sowie im Koppelelement 2. Das Diagramm II
zeigt den Schwingungsverlauf im Siebrahmen 1, wobei in
beiden Diagrammen I, II der Figur die Amplitudengröße a
über den Schwingungsort x aufgetragen wurde. Am Ort x0
befindet sich jeweils ein Schwingungsknoten.Diagram I of the figure shows the course of oscillation in transducer 4 and in
Durch die Längsschwingungen des Systems 4 wird ein auf den Siebrahmen 1 aufgebrachtes Sieb in seitliche Bewegungen versetzt, die weitgehend den Siebbewegungen beim manuellen Sieben entsprechen. Gegenüber den bekannten Siebvorrichtungen nach dem Stand der Technik erfolgt die Anregung der Siebfläche um 90° versetzt.Due to the longitudinal vibrations of the system 4, a the sieve frame 1 applied sieve in lateral Movements that largely offset the sieve movements in manual sieving. Compared to the known screening devices according to the prior art the sieve surface is excited by 90 °.
Die Erfindung ist nicht auf die hier beschriebenen Ausführungsformen beschränkt. Vielmehr ist es möglich, durch Kombination der Merkmale weitere Ausführungsbeispiele zu realisieren, ohne den Rahmen der Erfindung zu verlassen. So ist es auch mit Vorteil denkbar, eine Längsschwinger-Bewegung nach der Erfindung mit einer Biegeschwinger-Bewegung bekannter Art an einem Siebrahmen zu kombinieren. The invention is not limited to that described here Embodiments limited. Rather, it is possible by combining the features more Realize embodiments without the frame to leave the invention. So it is also an advantage conceivable a longitudinal oscillation movement after the Invention with a bending vibrator movement known Way to combine on a sieve frame.
- 11
- mit Schwingungen anzuregendes System (Siebrahmen)system to be vibrated (sieve frame)
- 22
- Koppelelementcoupling element
- 33
- λ /2-Längsschwingerλ / 2 longitudinal transducer
- 44
- schwingendes Systemvibrating system
- 55
- Anregungsachse von 4Excitation axis of 4
- 66
- Ebenelevel
- aa
- Amplitudeamplitude
- xx
- Ortplace
- x0 x 0
- Ortplace
Claims (4)
- A method for activating a sieve frame with ultrasound, wherein the sieve frame (1) is activated as a longitudinal vibrator over a coupling element (2), which is formed from at least two parallel longitudinal vibrators (3) coupled in the amplitude maximum and which displaces the axis (5) of activation of the vibrating system(4), producing the ultrasound, into the plane (6) of the sieve frame (1), which transmits the vibrations.
- The method of claim 1, wherein the sieve frame (1), which transmits the vibrations, is formed ring-shaped from an even number multiple of λ/2 elements, one of the λ/2 elements being formed already by the coupling element (2).
- The method of claims 1 and 2, wherein the sieve frame (1), which transmits the vibrations, is constructed rod-shaped.
- The method of claims 1 to 3, wherein several ring-shaped, elliptical and/or rod-shaped sieve frames (1), which transmit the vibrations, are disposed below a sieve (1) at the sieve fabric.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19811266A DE19811266C1 (en) | 1998-03-11 | 1998-03-11 | Method of cleaning filter frames |
| DE19811266 | 1998-03-11 | ||
| PCT/EP1999/001494 WO1999046061A1 (en) | 1998-03-11 | 1999-03-09 | Method for activating a sieve frame with ultrasounds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1062057A1 EP1062057A1 (en) | 2000-12-27 |
| EP1062057B1 true EP1062057B1 (en) | 2002-06-19 |
Family
ID=7861004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99915549A Expired - Lifetime EP1062057B1 (en) | 1998-03-11 | 1999-03-09 | Method for activating a sieve frame with ultrasounds |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1062057B1 (en) |
| JP (1) | JP2002505954A (en) |
| KR (1) | KR100462351B1 (en) |
| CN (1) | CN1138601C (en) |
| DE (2) | DE19811266C1 (en) |
| WO (1) | WO1999046061A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9822880D0 (en) * | 1998-10-21 | 1998-12-16 | Russel Finex | Improved efficiency ultrasonic sieving apparatus |
| JP2002011409A (en) * | 2000-06-30 | 2002-01-15 | Honda Electronic Co Ltd | Ultrasonic sieving device |
| US7017754B2 (en) | 2002-11-21 | 2006-03-28 | Hitachi Metals, Ltd. | Method and apparatus for classifying fine balls and method for producing cylindrical sieve |
| CN100414830C (en) * | 2003-08-26 | 2008-08-27 | 财团法人工业技术研究院 | Load adjustable surface acoustic wave actuator |
| JP4402966B2 (en) * | 2004-01-22 | 2010-01-20 | 新日本製鐵株式会社 | Ultrasonic square sieve device |
| JP4521599B2 (en) * | 2004-11-08 | 2010-08-11 | 本多電子株式会社 | Sieve device |
| JP4729385B2 (en) * | 2005-11-08 | 2011-07-20 | 株式会社村上精機工作所 | Vibrating sieve device |
| EP2067534A1 (en) * | 2007-12-05 | 2009-06-10 | Artech Systems AG | Screaning system with tube-like screan and method for operating a screaning system with tube-like screan |
| WO2016141971A1 (en) * | 2015-03-10 | 2016-09-15 | Telsonic Holding Ag | Screening system, eddy-current screening machine, and use of a screening system or of an eddy-current screening machine |
| WO2016142454A2 (en) * | 2015-03-10 | 2016-09-15 | Telsonic Holding Ag | Screening system, eddy-current screening machine, and use of a screening system or of an eddy-current screening machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062768A (en) * | 1972-11-14 | 1977-12-13 | Locker Industries Limited | Sieving of materials |
| FR2682050B1 (en) * | 1991-10-08 | 1994-07-22 | Chauvin Sarl Ets | SCREENING DEVICE EQUIPPED WITH DECOLMATION MEANS. |
| EP0652810B2 (en) * | 1993-05-26 | 2002-07-03 | Telsonic Ag | Process and device for sifting, sorting, screening, filtering or sizing substances |
| DE4418175C5 (en) * | 1993-05-26 | 2006-02-16 | Telsonic Ag | Apparatus and method for sifting, classifying, sifting, filtering or sorting fabrics |
-
1998
- 1998-03-11 DE DE19811266A patent/DE19811266C1/en not_active Revoked
-
1999
- 1999-03-09 CN CNB998038709A patent/CN1138601C/en not_active Expired - Fee Related
- 1999-03-09 JP JP2000535466A patent/JP2002505954A/en active Pending
- 1999-03-09 WO PCT/EP1999/001494 patent/WO1999046061A1/en active IP Right Grant
- 1999-03-09 KR KR10-2000-7009997A patent/KR100462351B1/en not_active IP Right Cessation
- 1999-03-09 DE DE59901794T patent/DE59901794D1/en not_active Expired - Fee Related
- 1999-03-09 EP EP99915549A patent/EP1062057B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR100462351B1 (en) | 2004-12-17 |
| WO1999046061A1 (en) | 1999-09-16 |
| DE59901794D1 (en) | 2002-07-25 |
| EP1062057A1 (en) | 2000-12-27 |
| DE19811266C1 (en) | 1999-08-05 |
| CN1138601C (en) | 2004-02-18 |
| CN1292735A (en) | 2001-04-25 |
| JP2002505954A (en) | 2002-02-26 |
| WO1999046061A8 (en) | 1999-10-21 |
| KR20010034570A (en) | 2001-04-25 |
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