EP1648614B1 - Full jacket helical conveyor centrifuge with direct drive - Google Patents

Full jacket helical conveyor centrifuge with direct drive Download PDF

Info

Publication number
EP1648614B1
EP1648614B1 EP04741196.2A EP04741196A EP1648614B1 EP 1648614 B1 EP1648614 B1 EP 1648614B1 EP 04741196 A EP04741196 A EP 04741196A EP 1648614 B1 EP1648614 B1 EP 1648614B1
Authority
EP
European Patent Office
Prior art keywords
drum
helical conveyor
full
centrifuge according
jacket
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 - Fee Related
Application number
EP04741196.2A
Other languages
German (de)
French (fr)
Other versions
EP1648614A1 (en
Inventor
Hans-Joachim Beyer
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.)
GEA Mechanical Equipment GmbH
Original Assignee
GEA Mechanical Equipment 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 GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP1648614A1 publication Critical patent/EP1648614A1/en
Application granted granted Critical
Publication of EP1648614B1 publication Critical patent/EP1648614B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/02—Electric motor drives
    • B04B9/04—Direct drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing

Definitions

  • the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
  • Such a prior art is of the generic type DE-A-2811887 or the DE 1732887 known.
  • laboratory centrifuges and electromagnetic drives are known, for example, think of the magnet in a beaker, which rotates. From the EP 0 930 099 B1
  • an electromagnetic gear for driving a laboratory centrifuge is known that is connected downstream of an electric motor, but which are not suitable for larger centrifuges such as solid bowl centrifuges.
  • a spinning centrifuge with a kind of magnetic drive also shows the DE 74 26 623 U1 ,
  • At least the drive device for the drum has at least one electromechanical direct drive whose primary or secondary elements are arranged directly on or on the drum or on or on a rotatably connected to the drum part, and its corresponding secondary or primary elements spaced therefrom without contact are arranged outside the drum or with this non-rotatably connected part, wherein the driving force is free of gear by an electromagnetic, around the drum or around the non-rotatably connected part progressing traveling field is generated, wherein the secondary elements of the at least one direct drive on the outer circumference of the drum or on the outer circumference of the rotatably connected to the drum part and the primary elements are each disposed radially outside of the secondary elements to these contact-free spaced.
  • the generation of the traveling field can be realized for example by a plurality of successively controllable coils on the outer circumference of the drum, which serve as the primary elements for generating the traveling field to take along a variety of particular permanent magnetic secondary elements.
  • the ratio between the inner axial extent of the drum and its inner diameter is preferably greater than 1, in particular greater than 2, 5 is. Especially with such drums of the "traveling field drive" can be accommodated in a simple manner in the region of the elongated drum without interfering with functional elements at the axial ends of the drum.
  • the secondary elements of the at least one direct drive on the outer circumference of the drum or on the outer circumference of a rotatably connected to the drum part and the primary elements are each disposed radially outside of the secondary elements to these contact-free.
  • the invention is suitable for use in solid bowl centrifuges. So there are in this type of centrifuge particularly many places of the drum, on which - depending on the performance and constructive-geometric condition - one or more of the electromagnetic Direct drive devices for the drum can be arranged.
  • the compact arrangement is particularly advantageous because the drive device is completely integrated into the decanter frame and the machine frame. Also to mention are advantageous here also the low noise and possibly even vibration damping properties. The forces acting on the drum bearing forces that would exert a belt drive eliminated.
  • several of the electromagnetic direct drives can be arranged on the drum or the rotatably connected to the drum part.
  • the drum itself offers, from a structural point of view, the most preferred location of the arrangement of the direct drive. In this area, although a thermal influence on the drum and the centrifugal material. This can i.allg. be kept relatively low.
  • the primary or secondary elements surrounding the drum in whole or in sections concentrically.
  • the sectional arrangement simplifies significantly the design effort.
  • the primary or secondary elements are arranged on a radially projecting from the drum or with this rotatably connected part annular disc which is rotatably connected with this / this and that the corresponding secondary or primary elements on a rotationally fixed annular disc or are arranged on a ring which is arranged, for example, axially offset parallel to the co-rotating disk.
  • the field of application of the invention is the solid bowl screw centrifuge, ie the so-called decanter with screw, where a belt drive for the drum can be replaced.
  • the screw can be driven in any other way, for. B. hydraulically or mechanically or via a transmission between the drum and screw or via another direct drive with traveling field arrangement. In this case, can also be dispensed with a transmission between the drum and screw.
  • a drive device for the worm may also comprise at least one electromechanical direct drive (e), the primary or secondary elements of which are arranged directly on or on a part rotatably connected to the worm, and whose corresponding secondary or primary elements are located outside the wiper without contact are disposed of this part, wherein the driving force is generated gear-free by an electromagnetic, to the non-rotatably connected to the screw part progressing traveling field.
  • e electromechanical direct drive
  • drum and / or the worm have at least one play-free bearing, around or directly next to which the respective electromagnetic direct drive is arranged.
  • the drive device for the screw is formed independently of the drive device for the drum.
  • Fig. 1 shows a solid bowl screw centrifuge 1 with a rotatably mounted drum 2 and a rotatably mounted screw 3, which has a differential speed to the drum 2 during operation.
  • Both the drum 2 and the screw 3 each have a cylindrical portion 2a, 3a with at least one outlet 5 for a liquid phase and a tapered one-sided, e.g. conical section 2b, 3b with a outlet 28 for a solid phase.
  • the drum 2 is closed at its cylindrical end by a drum cover 4, which has the outlet 5 for the liquid phase, which here purely by way of example a chamber 6 is connected downstream with a stationary in operation peeling disk 7, which in turn is followed by a derivative 8, but also, a throttle plate or directly downstream of a derivative can be (not shown here).
  • An inlet pipe 9 discharges axially through the screw 3 or the screw body from the cylindrical end of the drum 2 into a distributor 10, which has openings 11 in the centrifugal space 12 between the drum 2 and the screw 3.
  • drum bearings 13, 14 are arranged at both ends of the drum.
  • the drum 2 is also mounted at its two axial ends with drum bearings 15, 16 on a machine frame 17, not shown here.
  • the drum 2 has several parts which are rotatably connected thereto. These include the peeling disc chamber 6 and a plurality of cylindrical lugs 17, 18, 19, 20 of the drum 2, each of which is e.g. in the axial direction between the main drum bearings 15, 16 or laterally outside the main drum bearings 15, 16 may be arranged at both axial ends of the drum 2.
  • the ratio between the axial inner extent of the drum and the maximum inner diameter is greater than 1, in particular greater than 2, 5;
  • the screw 3 has, in the axial extension of its conical section 3b, a shaft 21 to which the first drive device 22 - for driving the screw 3 - adjoins, which here comprises a gear 23 and an electric motor 24.
  • the electromagnetic direct drive 25a-f may preferably be arranged at different points of the drum 2 or on a preferably non-rotatably connected to the drum 2 part, which is exemplified here by the total of six drive devices. It is also conceivable to provide a plurality of the drive devices on the drum 2 or on the non-rotatably connected to the drum 2 parts.
  • each on the cylindrical portion 2a of the drum 2 or on a cylindrical rotatably connected to the elongated drum 2 part eg, the parts with the reference numerals 6, 17, 18, 19, 20
  • rotor or secondary elements 26 and concentric with the Secondary elements 26 arranged and arranged without contact to these spaced primary elements 27 e.g. the ends of the drum, where the discharges for the solid and liquid phases are located, remain free of elements of the drives.
  • the primary elements 27 may extend around the entire circumference of the drum 2 or only over a circular sector, e.g. over a circumference of 90 °.
  • the electromagnetic direct drive is similar to an electromagnetic "linear motor” constructed, except that this here in whole or in sections - which is constructive is particularly simple - around the drum 2 or the rotatably connected to the drum part is guided around. It serves a variety - eg more than eight - of primary elements 27 - eg coils - the structure of a traveling magnetic field, which moves virtually outside the metallic solid shell drum while a variety - eg more than eight - in particular permanent magnetic or coil-like secondary elements 26 on the drum entraining. This is purely schematic in Fig. 2 shown.
  • the primary elements 27 surround the drum, preferably in sections or completely, and the secondary elements 26 completely surround the drum.
  • the secondary elements 26 are preferably arranged on a cylindrical portion of the drum 2, in particular in the region of the axial center (for example at 25d) of the drum 2 and completely or in a sector-shaped manner around the latter and preferably radially.
  • the cylindrical section is the preferred location of the drive.
  • the axial ends of the drum remain free of drive components components for the drum, which simplifies the structure of the arrangement.
  • an axial projection 6, 18, 19, 20, 17 on the drum, which is rotatably connected thereto for the arrangement of the secondary elements 26 are used, in the axial direction preferably inside or outside of the drum bearings 15, 16 and in the axial extension of the Drum 2 or on the conical portion 2b of the drum - 17 can be arranged approach.
  • the lug 19 could also include a gearbox between the screw and the drum. This embodiment is less preferred.
  • the screw 3 for example, on the shaft 21 or on one with this rotatably connected element (not shown here) with its own further direct drive (also not shown here) are driven in the manner of the direct drive for the drum 2, in which case you could even do without a transmission between the drum 2 and screw 3 in this case.

Landscapes

  • Centrifugal Separators (AREA)

Description

Die Erfindung betrifft eine Vollmantel-Schneckenzentrifuge nach dem Oberbegriff des Anspruchs 1.The invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.

Ein derartiger Stand der Technik ist aus der gattungsgemäßen DE-A-2811887 oder der DE 1732887 bekannt.Such a prior art is of the generic type DE-A-2811887 or the DE 1732887 known.

Es ist bekannt, Zentrifugen auf verschiedenste Art anzutreiben. Im Bereich der Vollmantel-Schneckenzentrifugen hat es sich durchgesetzt, die Schnecke und die Trommel jeweils mit einer Antriebsvorrichtung zu versehen, um diese beiden Elemente getrennt voneinander ohne die Bindung an ein festes Übersetzungsverhältnis ansteuern zu können. Ein derartiger Stand der Technik ist aus der bereits genannten DE-A-2811887 oder auch aus der DE 1732887 bekannt.It is known to drive centrifuges in a variety of ways. In the field of solid bowl centrifuges, it has become common to provide the screw and the drum each with a drive device to be able to control these two elements separately without binding to a fixed ratio. Such a prior art is known from the already mentioned DE-A-2811887 or even from the DE 1732887 known.

Zum Antrieb der Trommel wird i.allg. ein Riementrieb eingesetzt, welcher sich in der Praxis gut bewährt hat, der aber relativ viel Bauraum benötigt und infolge der Reibwärme bei Riemenschlupf hohe Temperaturen an den Riemen und den Riemenscheiben erzeugt sowie auch oftmals relativ laut ist. Daher besteht der Bedarf nach alternativen Antriebskonzepten, bei welchen ein Riementrieb vermieden wird.To drive the drum i.allg. a belt drive used, which has worked well in practice, but which requires a relatively large amount of space and due to the frictional heat in belt slippage generates high temperatures on the belt and the pulleys and is also often relatively loud. There is therefore a need for alternative drive concepts in which a belt drive is avoided.

Beispielsweise von Laborzentrifugen sind auch elektromagnetische Antriebe bekannt, man denke beispielsweise an den Magneten in einem Becherglas, welches sich dreht. Aus der EP 0 930 099 B1 ist darüber hinaus auch ein elektromagnetisches Getriebe zum Antrieb einer Laborzentrifuge bekannt, dass einem Elektromotor nachgeschaltet ist, das aber für größere Zentrifugen wie Vollmantel-Schneckenzentrifugen nicht geeignet sind. Eine Spinnzentrifuge mit einer Art Magnetantrieb zeigt auch die DE 74 26 623 U1 .For example, laboratory centrifuges and electromagnetic drives are known, for example, think of the magnet in a beaker, which rotates. From the EP 0 930 099 B1 In addition, an electromagnetic gear for driving a laboratory centrifuge is known that is connected downstream of an electric motor, but which are not suitable for larger centrifuges such as solid bowl centrifuges. A spinning centrifuge with a kind of magnetic drive also shows the DE 74 26 623 U1 ,

Der Einsatz eines Axialfeld-Elektromotors bei einer Zucker-Trommelzentrifuge ohne Schnecke ist ferner aus der DE 33 25 566 A bekannt. Ein Einsatz an einer Vollmantel-Schneckenzentrifuge wurde dagegen bisher nicht erwogen, wohl, da diese Zentrifugenart stets auch einen Antrieb für die Schnecke benötigt und da man auch eine zu starke Erwärmung des Produktes über die Trommel befürchtete. Analoges gilt für die Lösungen der DE 40 08 945 C2 , die eine Verdampfer-Konzentrator-Zentrifuge zeigt, und der DE 38 34 222 C2 .The use of an axial field electric motor in a sugar drum centrifuge without screw is also from the DE 33 25 566 A known. An insert on a solid bowl centrifuge on the other hand, it has not been considered before, probably because this type of centrifuge always requires a drive for the screw and because it was feared that the product would be overheated by the drum too much. The same applies to the solutions of DE 40 08 945 C2 showing an evaporator-concentrator-centrifuge, and the DE 38 34 222 C2 ,

Die Schaffung einer Vollmantel-Schneckenzentrifuge, mit einem zu einem Riemenantrieb alternativen Antrieb ist die Aufgabe der Erfindung.The provision of a solid bowl screw centrifuge, with an alternative to a belt drive drive is the object of the invention.

Die Erfindung löst diese Aufgabe durch den Gegenstand des Anspruchs 1.The invention solves this problem by the subject matter of claim 1.

Danach weist zumindest die Antriebsvorrichtung für die Trommel wenigstens einen elektromechanischen Direktantrieb auf, dessen Primär- oder Sekundärelemente direkt an oder auf der Trommel oder an oder auf einem mit der Trommel drehfest verbundenen Teil angeordnet sind, und dessen korrespondierende Sekundär- oder Primärelemente zu diesen berührungsfrei beabstandet außerhalb der Trommel oder des mit dieser drehfest verbundenen Teils angeordnet sind, wobei die Vortriebskraft getriebefrei durch ein elektromagnetisches, rund um die Trommel oder rund um das mit dieser drehfest verbundene Teil fortschreitendes Wanderfeld erzeugbar ist, wobei die Sekundärelemente des wenigstens einen Direktantriebes am Außenumfang der Trommel oder am Außenumfang des mit der Trommel drehfest verbundenen Teiles und die Primärelemente jeweils radial außerhalb der Sekundärelemente zu diesen berührungsfrei beabstandet angeordnet sind.Thereafter, at least the drive device for the drum has at least one electromechanical direct drive whose primary or secondary elements are arranged directly on or on the drum or on or on a rotatably connected to the drum part, and its corresponding secondary or primary elements spaced therefrom without contact are arranged outside the drum or with this non-rotatably connected part, wherein the driving force is free of gear by an electromagnetic, around the drum or around the non-rotatably connected part progressing traveling field is generated, wherein the secondary elements of the at least one direct drive on the outer circumference of the drum or on the outer circumference of the rotatably connected to the drum part and the primary elements are each disposed radially outside of the secondary elements to these contact-free spaced.

Die Erzeugung des Wanderfeldes kann beispielsweise durch eine Vielzahl von nacheinander ansteuerbaren Spulen am Außenumfang der Trommel realisiert werden, die als die Primärelemente zur Erzeugung des Wanderfeldes dienen, um dabei eine Vielzahl der insbesondere permanentmagnetischen Sekundärelemente mitzunehmen.The generation of the traveling field can be realized for example by a plurality of successively controllable coils on the outer circumference of the drum, which serve as the primary elements for generating the traveling field to take along a variety of particular permanent magnetic secondary elements.

Damit wird das bestechend einfache Konzept eines direkt ohne vorgeschalteten Elektromotor erzeugten Wanderfeldes, welches z.B. am Außenumfang der Trommel rundum fortschreitet und diese nicht wie ein Drehfeld durchsetzt, in einfacher Weise auch zum direkten Antrieb einer Schleudertrommel eines Dekanters mit Schnecke genutzt, wobei die Schnecke nach einer Erkenntnis der Erfindung durchaus auch auf andere Weise antreibbar ist als die Trommel, so z.B. mit einem üblichen Drehfeld-Elektromotor. Auch kann das Problem der Wärmeentwicklung des Produktes über die Trommel wider Erwarten auch bei einer Vollmantel-Schneckenzentrifuge durchaus beherrscht werden. Zudem ist eine stufenlose Drehzahleinstellung auf einfache Weise auch ohne Frequenzumformer möglich.This is the captivatingly simple concept of a traveling field generated directly without an upstream electric motor, which, for example, on the outer circumference of the drum progresses all around and this does not penetrate like a rotating field, in a simple way to used directly drive a centrifugal drum of a decanter with screw, wherein the screw is certainly drivable in a different way to the drum as a realization of the invention, such as with a conventional rotary electric motor. Also, the problem of heat development of the product on the drum contrary to expectations, even with a solid bowl screw centrifuge can be quite controlled. In addition, a stepless speed adjustment is possible in a simple manner without frequency converter.

Dabei ist das Verhältnis zwischen der inneren axialen Erstreckung der Trommel und ihrem inneren Durchmesser vorzugsweise größer als 1, insbesondere größer als 2, 5 ist. Gerade bei derartigen Trommeln kann der "Wanderfeldantrieb" auf einfache Weise im Bereich der langgestreckten Trommel untergebracht werden, ohne störend mit Funktionselementen an den axialen Enden der Trommel zu interferieren.The ratio between the inner axial extent of the drum and its inner diameter is preferably greater than 1, in particular greater than 2, 5 is. Especially with such drums of the "traveling field drive" can be accommodated in a simple manner in the region of the elongated drum without interfering with functional elements at the axial ends of the drum.

Mit der Erfindung kann auf einen Riementrieb für die Trommel auf einfachste Weise verzichtet werden. Stattdessen wird in überraschender Weise ein elektromagnetischer, getriebeloser Direktantrieb für die Trommel genutzt, der bei hohem Drehmoment kompakt baut und leise sowie gut steuerbar ist. Hierdurch ergibt sich auch ein Sicherheitsvorteil, denn mit dem Direktantrieb kann die Trommel besonders schnell gebremst werden.With the invention can be dispensed with a belt drive for the drum in the simplest way. Instead, an electromagnetic, gearless direct drive for the drum is used in a surprising manner, which builds compact at high torque and is quiet and easy to control. This also results in a safety advantage, because with the direct drive, the drum can be braked particularly fast.

Nach dem Merkmal h) des Anspruchs 1 sind die Sekundärelemente des wenigstens einen Direktantriebes am Außenumfang der Trommel oder am Außenumfang eines mit der Trommel drehfest verbundenen Teiles und die Primärelemente jeweils radial außerhalb der Sekundärelemente zu diesen berührungsfrei beabstandet angeordnet. Durch diese Anordnung wird eine besonders kompakte und einfach zu realisierende Variante der Erfindung verwirklicht, welche es ermöglicht, auf ein Getriebe ganz zu verzichten. Nachteilige axiale Kräfte auf die Lagerung werden vermieden.According to the feature h) of claim 1, the secondary elements of the at least one direct drive on the outer circumference of the drum or on the outer circumference of a rotatably connected to the drum part and the primary elements are each disposed radially outside of the secondary elements to these contact-free. By this arrangement, a particularly compact and easy to implement variant of the invention is realized, which makes it possible to dispense with a transmission entirely. Adverse axial forces on the storage are avoided.

Die Erfindung eignet sich für den Einsatz bei Vollmantel-Schneckenzentrifugen. So gibt es bei dieser Zentrifugenart besonders viele Stellen der Trommel, an welcher - je nach Leistung und konstruktiv-geometrischer Gegebenheit - ein oder auch mehrere der elektromagnetischen Direkt-Antriebsvorrichtungen für die Trommel angeordnet werden können. Hier ist die kompakte Anordnung besonders von Vorteil, da die Antriebsvorrichtung vollständig in das Dekantergestell bzw. das Maschinengestell integrierbar ist. Als vorteilhaft zu erwähnen sind ferner auch hier die geringe Lärmentwicklung und die u.U. sogar schwingungsdämpfenden Eigenschaften. Die auf die Trommellagerung einwirkenden Kräfte, die ein Riementrieb ausüben würde, entfallen.The invention is suitable for use in solid bowl centrifuges. So there are in this type of centrifuge particularly many places of the drum, on which - depending on the performance and constructive-geometric condition - one or more of the electromagnetic Direct drive devices for the drum can be arranged. Here, the compact arrangement is particularly advantageous because the drive device is completely integrated into the decanter frame and the machine frame. Also to mention are advantageous here also the low noise and possibly even vibration damping properties. The forces acting on the drum bearing forces that would exert a belt drive eliminated.

Theoretisch können auch mehrere der elektromagnetischen Direktantriebe an der Trommel oder dem mit der Trommel drehfest verbundenen Teil angeordnet sein.Theoretically, several of the electromagnetic direct drives can be arranged on the drum or the rotatably connected to the drum part.

Die Trommel selbst, insbesondere ihr zylindrischer Abschnitt, bietet dagegen aus konstruktiver Hinsicht den ganz besonders bevorzugten Ort der Anordnung des Direktantriebes. In diesem Bereich entsteht zwar ein thermischer Einfluss auf die Trommel und das Schleudergut. Dieser kann aber i.allg. relativ gering gehalten werden.The drum itself, in particular its cylindrical section, on the other hand offers, from a structural point of view, the most preferred location of the arrangement of the direct drive. In this area, although a thermal influence on the drum and the centrifugal material. This can i.allg. be kept relatively low.

Wird dagegen ein Ansatz in axialer Verlängerung der Trommel zur Anordnung des Direktantriebes genutzt, wird eine zusätzliche Wärmeentwicklung des Produktbereichs über die Trommel vermieden. Dennoch wird ein Antrieb direkt an der Trommel zwischen den beiden Hauptlagern bevorzugt, zumal hier auch negative Belastungen des Antriebs auf die Hauptlager weitgehendst vermieden werden könnenIf, on the other hand, an approach in the axial extension of the drum is used to arrange the direct drive, additional heat generation of the product area via the drum is avoided. Nevertheless, a drive is preferred directly on the drum between the two main bearings, especially since negative loads on the drive of the main bearing can be largely avoided

Ganz besonders bevorzugt umgeben die Primär- oder Sekundärelemente die Trommel ganz oder abschnittsweise konzentrisch. Die abschnittsweise Anordnung vereinfacht dabei deutlich den konstruktiven Aufwand.Most preferably, the primary or secondary elements surrounding the drum in whole or in sections concentrically. The sectional arrangement simplifies significantly the design effort.

Dabei ist es auch denkbar, wenn die Primär- oder Sekundärelemente auf einer radial von der Trommel oder einem mit dieser drehfest verbundenen Teil vorkragenden Ringscheibe angeordnet sind, die mit dieser/diesem drehfest verbunden ist und dass die korrespondierenden Sekundär- oder Primärelemente auf einer drehfesten Ringscheibe oder an einem Ring angeordnet sind, die/der beispielsweise axial versetzt parallel zur mitdrehenden Scheibe angeordnet ist.It is also conceivable if the primary or secondary elements are arranged on a radially projecting from the drum or with this rotatably connected part annular disc which is rotatably connected with this / this and that the corresponding secondary or primary elements on a rotationally fixed annular disc or are arranged on a ring which is arranged, for example, axially offset parallel to the co-rotating disk.

Das Einsatzgebiet der Erfindung ist die Vollmantel-Schneckenzentrifuge, also der sogenannte Dekanter mit Schnecke, wo ein Riementrieb für die Trommel ersetzt werden kann. Die Schnecke kann beliebig auf andere Weise angetrieben werden, z. B. hydraulisch oder mechanisch oder über ein Getriebe zwischen Trommel und Schnecke oder über einen weiteren Direktantrieb mit Wanderfeldanordnung. In diesem Fall kann auch auf ein Getriebe zwischen Trommel und Schnecke verzichtet werden.The field of application of the invention is the solid bowl screw centrifuge, ie the so-called decanter with screw, where a belt drive for the drum can be replaced. The screw can be driven in any other way, for. B. hydraulically or mechanically or via a transmission between the drum and screw or via another direct drive with traveling field arrangement. In this case, can also be dispensed with a transmission between the drum and screw.

Nach einer Variante der Erfindung kann auch eine Antriebsvorrichtung für die Schnecke wenigstens einen elektromechanischen Direktantrieb(e) aufweisen, dessen Primär- oder Sekundärelemente direkt an oder auf einem mit der Schnecke drehfest verbundenen Teil angeordnet sind, und dessen korrespondierende Sekundär- oder Primärelemente berührungsfrei beabstandet außerhalb dieses Teils angeordnet sind, wobei die Vortriebskraft getriebefrei durch ein elektromagnetisches, um das drehfest mit der Schnecke verbundene Teil fortschreitendes Wanderfeld erzeugt ist. Derart könnte sogar auf ein Getriebe zwischen Trommel und Schnecke verzichtet werden, so dass man die beiden Elemente vollkommen unabhängig voneinander ansteuern kann. Dabei bietet es sich an, beide Antriebe, d.h., den für die Trommel und den für die Schnecke als Direktantrieb auszugestalten.According to a variant of the invention, a drive device for the worm may also comprise at least one electromechanical direct drive (e), the primary or secondary elements of which are arranged directly on or on a part rotatably connected to the worm, and whose corresponding secondary or primary elements are located outside the wiper without contact are disposed of this part, wherein the driving force is generated gear-free by an electromagnetic, to the non-rotatably connected to the screw part progressing traveling field. In this way, it would even be possible to dispense with a transmission between the drum and the screw, so that the two elements can be controlled completely independently of one another. It makes sense to design both drives, that is, for the drum and the screw as a direct drive.

Es ist denkbar, wenn die Trommel und/oder die Schnecke wenigstens eine spielfreie Lagerung aufweisen, um oder direkt neben welcher der jeweilige elektromagnetische Direktantrieb angeordnet ist.It is conceivable if the drum and / or the worm have at least one play-free bearing, around or directly next to which the respective electromagnetic direct drive is arranged.

Vorzugsweise - aber nicht zwingend - ist die Antriebsvorrichtung für die Schnecke unabhängig von der Antriebsvorrichtung für die Trommel ausgebildet.Preferably - but not necessarily - the drive device for the screw is formed independently of the drive device for the drum.

Vorteilhaft ist es schließlich auch, wenn ein weiterer mitrotierender Wanderfeldmotor (lediglich) die benötigte Differenzdrehzahl zwischen der Schnecke und der Trommel erzeugt, da dieser nu klein dimensioniert und damit kostengünstig ist.Finally, it is also advantageous if another co-rotating traveling-field motor (only) generates the required differential rotational speed between the worm and the drum, since this is dimensioned small and hence inexpensive.

Vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Advantageous embodiments can be found in the dependent claims.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezug auf die Fig. näher beschrieben. Es zeigt:

Fig. 1
einen Schnitt durch eine Vollmantel-Schneckenzentrifuge mit einer schematischen Darstellung der Antriebsvorrichtung für die Trommel, welche in mehreren alternativen Anordnungen gezeigt wird; und
Fig. 2
zwei schematische Darstellungen von Schleudertrommeln mit Direktantrieben zur Veranschaulichung der Funktionsweise der Erfindung.
The invention will be described in more detail by means of exemplary embodiments with reference to the figures. It shows:
Fig. 1
a section through a solid bowl centrifuge with a schematic representation of the drive device for the drum, which is shown in several alternative arrangements; and
Fig. 2
two schematic representations of centrifugal drums with direct drives to illustrate the operation of the invention.

Fig. 1 zeigt eine Vollmantel-Schneckenzentrifuge 1 mit einer drehbar gelagerten Trommel 2 und einer drehbar gelagerten Schnecke 3, welche im Betrieb eine Differenzdrehzahl zur Trommel 2 aufweist. Fig. 1 shows a solid bowl screw centrifuge 1 with a rotatably mounted drum 2 and a rotatably mounted screw 3, which has a differential speed to the drum 2 during operation.

Sowohl die Trommel 2 als auch die Schnecke 3 weisen jeweils einen zylindrischen Abschnitt 2a, 3a mit wenigstens einem Auslass 5 für eine Flüssigkeitsphase sowie einen sich daran einseitig anschließenden verjüngenden, z.B. konischen Abschnitt 2b, 3b mit einem Auslass 28 für eine Feststoffphase auf.Both the drum 2 and the screw 3 each have a cylindrical portion 2a, 3a with at least one outlet 5 for a liquid phase and a tapered one-sided, e.g. conical section 2b, 3b with a outlet 28 for a solid phase.

Die Trommel 2 wird an ihrem zylindrischen Ende von einem Trommeldeckel 4 verschlossen, welcher den Auslaß 5 für die Flüssigkeitsphase aufweist, dem hier rein beispielhaft eine Kammer 6 mit einer im Betrieb stillstehenden Schälscheibe 7 nachgeschaltet ist, der wiederum eine Ableitung 8 nachgeordnet ist, dem aber auch eine Drosselscheibe oder direkt eine Ableitung nachgeschaltet sein kann (hier nicht dargestellt).The drum 2 is closed at its cylindrical end by a drum cover 4, which has the outlet 5 for the liquid phase, which here purely by way of example a chamber 6 is connected downstream with a stationary in operation peeling disk 7, which in turn is followed by a derivative 8, but Also, a throttle plate or directly downstream of a derivative can be (not shown here).

Ein Zulaufrohr 9 mündet axial durch die Schnecke 3 bzw. den Schneckenkörper vom zylindrischen Ende der Trommel 2 her in einen Verteiler 10, welcher Öffnungen 11 in den Schleuderraum 12 zwischen Trommel 2 und Schnecke 3 aufweist.An inlet pipe 9 discharges axially through the screw 3 or the screw body from the cylindrical end of the drum 2 into a distributor 10, which has openings 11 in the centrifugal space 12 between the drum 2 and the screw 3.

Zwischen der Trommel 2 und der Schnecke 3 sind an beiden Enden der Trommel 2 Lager 13, 14 angeordnet. Die Trommel 2 ist zudem an ihren beiden axialen Enden mit Trommellagern 15, 16 an einem hier nicht dargestellten Maschinengestell 17 gelagert.Between the drum 2 and the screw 3 2 bearings 13, 14 are arranged at both ends of the drum. The drum 2 is also mounted at its two axial ends with drum bearings 15, 16 on a machine frame 17, not shown here.

Die Trommel 2 weist mehrere Teile auf, welche mit dieser drehfest verbunden sind. Dazu gehören die Kammer 6 für die Schälscheibe sowie jeweils mehrere zylindrische Ansätze 17, 18, 19, 20 der Trommel 2, die z.B. in axialer Richtung zwischen den Haupttrommellagern 15, 16 oder seitlich außerhalb der Haupttrommellager 15, 16 an beiden axialen Enden der Trommel 2 angeordnet sein können. Das Verhältnis zwischen der axialen inneren Erstreckung der Trommel und dem maximalen inneren Durchmesser ist größer als 1, insbesondere größer als 2, 5; insbesondere größer oder größer gleich 3. Die Schnecke 3 weist in axialer Verlängerung ihres konischen Abschnitts 3b eine Welle 21 auf, an welche sich die erste Antriebsvorrichtung 22 - zum Antrieb der Schnecke 3 - anschließt, welche hier ein Getriebe 23 und einen Elektromotor 24 umfasst.The drum 2 has several parts which are rotatably connected thereto. These include the peeling disc chamber 6 and a plurality of cylindrical lugs 17, 18, 19, 20 of the drum 2, each of which is e.g. in the axial direction between the main drum bearings 15, 16 or laterally outside the main drum bearings 15, 16 may be arranged at both axial ends of the drum 2. The ratio between the axial inner extent of the drum and the maximum inner diameter is greater than 1, in particular greater than 2, 5; The screw 3 has, in the axial extension of its conical section 3b, a shaft 21 to which the first drive device 22 - for driving the screw 3 - adjoins, which here comprises a gear 23 and an electric motor 24.

Als zweite Antriebsvorrichtung bzw. als Antriebsvorrichtung für die Trommel 2 dient wenigstens ein getriebefreier elektromagnetischer Direktantrieb 25a-f. Der elektromagnetische Direktantrieb 25a-f kann vorzugsweise an verschiedenen Stellen der Trommel 2 oder an einem mit der Trommel 2 bevorzugt drehfest verbundenem Teil angeordnet sein, was hier beispielhaft durch die insgesamt sechs Antriebsvorrichtungen dargestellt wird. Es ist auch denkbar, mehrere der Antriebesvorrichtungen an der Trommel 2 bzw. an den mit der Trommel 2 drehfestverbundenen Teilen vorzusehen.As a second drive device or as a drive device for the drum 2 is at least one gear-free electromagnetic direct drive 25a-f. The electromagnetic direct drive 25a-f may preferably be arranged at different points of the drum 2 or on a preferably non-rotatably connected to the drum 2 part, which is exemplified here by the total of six drive devices. It is also conceivable to provide a plurality of the drive devices on the drum 2 or on the non-rotatably connected to the drum 2 parts.

Dabei sind jeweils auf dem zylindrischen Abschnitt 2a der Trommel 2 oder auf einem zylindrischen, drehfest mit der langgestreckten Trommel 2 verbundenem Teil (z.B. die Teile mit den Bezugszeichen 6, 17, 18, 19, 20) Läufer- oder Sekundärelemente 26 sowie konzentrisch zu den Sekundärelementen 26 angeordnete und berührungsfrei zu diesen beabstandete Primärelemente 27 angeordnet. Hier bleiben die Enden der Trommel, an denen sich die Austräge für die Feststoff- und Flüssigkeitsphasen befinden, von Elementen der Antriebe frei.In this case, each on the cylindrical portion 2a of the drum 2 or on a cylindrical rotatably connected to the elongated drum 2 part (eg, the parts with the reference numerals 6, 17, 18, 19, 20) rotor or secondary elements 26 and concentric with the Secondary elements 26 arranged and arranged without contact to these spaced primary elements 27. Here, the ends of the drum, where the discharges for the solid and liquid phases are located, remain free of elements of the drives.

Die Primärelemente 27 können sich um den gesamten Umfang der Trommel 2 herum erstrecken oder nur über einen Kreissektor, z.B. über einen Umfang von 90°.The primary elements 27 may extend around the entire circumference of the drum 2 or only over a circular sector, e.g. over a circumference of 90 °.

Der elektromagnetische Direktantrieb ist dabei ähnlich zu einem elektromagnetischen "Linearmotor" aufgebaut, nur dass dieser hier ganz oder abschnittsweise - was konstruktiv besonders einfach ist - um die Trommel 2 oder das mit der Trommel drehfest verbundene Teil herum geführt ist. Dabei dient eine Vielzahl - z.B. mehr als acht - von Primärelementen 27 - z.B. jeweils Spulen - dem Aufbau eines Wandermagnetfeldes, welches quasi außen um die metallische Vollmanteltrommel wandert und dabei eine Vielzahl - z.B. mehr als acht - insbesondere permanentmagnetischer oder spulenartiger Sekundärelemente 26 auf der Trommel mitnimmt. Dies ist rein schematisch in Fig. 2 dargestellt. Die Primärelemente 27 umgeben die Trommel vorzugsweise abschnittsweise oder ganz und die Sekundärelemente 26 umgeben die Trommel ganz.The electromagnetic direct drive is similar to an electromagnetic "linear motor" constructed, except that this here in whole or in sections - which is constructive is particularly simple - around the drum 2 or the rotatably connected to the drum part is guided around. It serves a variety - eg more than eight - of primary elements 27 - eg coils - the structure of a traveling magnetic field, which moves virtually outside the metallic solid shell drum while a variety - eg more than eight - in particular permanent magnetic or coil-like secondary elements 26 on the drum entraining. This is purely schematic in Fig. 2 shown. The primary elements 27 surround the drum, preferably in sections or completely, and the secondary elements 26 completely surround the drum.

Die Sekundärelemente 26 werden bevorzugt auf einem zylindrischen Abschnitt der Trommel 2, insbesondere im Bereich der axialen Mitte (z.B. bei 25d) der Trommel 2 und vollständig oder sektorförmig um diese herum angeordnet und auf diese vorzugsweise radial aufgelegt.The secondary elements 26 are preferably arranged on a cylindrical portion of the drum 2, in particular in the region of the axial center (for example at 25d) of the drum 2 and completely or in a sector-shaped manner around the latter and preferably radially.

Der zylindrische Abschnitt ist der bevorzugte Ort des Antriebs. Hierbei bleiben die axialen Enden der Trommel frei von Antriebskomponenten Komponenten für die Trommel, was den Aufbau der Anordnung vereinfacht.The cylindrical section is the preferred location of the drive. Here, the axial ends of the drum remain free of drive components components for the drum, which simplifies the structure of the arrangement.

Alternativ kann ein axialer Ansatz 6, 18, 19, 20, 17 an der Trommel, welcher mit dieser drehfest verbunden ist zur Anordnung der Sekundärelemente 26 genutzt werden, der in axialer Richtung vorzugsweise innerhalb oder außerhalb der Trommellager 15, 16 sowie in axialer Verlängerung der Trommel 2 oder auf dem konischen Abschnitt 2b der Trommel - Ansatz 17 angeordnet sein kann. Der Ansatz 19 könnte auch ein Getriebe zwischen Schnecke und Trommel beinhalten. Diese Ausführungsform wird weniger bevorzugt.Alternatively, an axial projection 6, 18, 19, 20, 17 on the drum, which is rotatably connected thereto for the arrangement of the secondary elements 26 are used, in the axial direction preferably inside or outside of the drum bearings 15, 16 and in the axial extension of the Drum 2 or on the conical portion 2b of the drum - 17 can be arranged approach. The lug 19 could also include a gearbox between the screw and the drum. This embodiment is less preferred.

Es könnte optional/alternativ auch die Schnecke 3 z.B. an der Welle 21 bzw. an einem mit dieser drehfest verbundenen Element (hier nicht dargestellt) mit einem eigenen weiteren Direktantrieb (hier ebenfalls nicht dargestellt) nach Art des Direktantriebes für die Trommel 2 angetrieben werden, wobei man in diesem Fall sogar auf ein Getriebe zwischen Trommel 2 und Schnecke 3 verzichten könnte.It could optionally / alternatively also the screw 3, for example, on the shaft 21 or on one with this rotatably connected element (not shown here) with its own further direct drive (also not shown here) are driven in the manner of the direct drive for the drum 2, in which case you could even do without a transmission between the drum 2 and screw 3 in this case.

Über eine hier nicht dargestellte frequenzumformerfreie Steuerungseinheit lässt sich die Drehzahl des Antriebs und damit der Trommel 2 und/oder der Schnecke 3 beliebig einstellen. Bezugszeichen Vollmantel-Schneckenzentrifuge 1 Trommel 2 Schnecke 3 zylindrische Abschnitte 2a, 3a konische Abschnitte 2b, 3b Trommeldeckel 4 Auslaß 5 Kammer 6 Schälscheibe 7 Ableitung 8 Zulaufrohr 9 Verteiler 10 Öffnungen 11 Schleuderraum 12 Lager 13, 14 Trommellagern 15, 16 Ansätze 17, 18, 19, 20 Welle 21 erste Antriebsvorrichtung 22 Getriebe 23 Elektromotor 24 zweite Antriebsvorrichtung 25a bis 25f Sekundärelemente 26 Primärelemente 27 Feststoffauslass 28 About a frequency converter-free control unit, not shown here, the speed of the drive and thus the drum 2 and / or the screw 3 can be set arbitrarily. <B> reference numerals </ b> Solid bowl centrifuge 1 drum 2 slug 3 cylindrical sections 2a, 3a conical sections 2b, 3b drum lid 4 outlet 5 chamber 6 peeling disc 7 derivation 8th supply pipe 9 distributor 10 openings 11 centrifugal chamber 12 camp 13, 14 drum bearings 15, 16 approaches 17, 18, 19, 20 wave 21 first drive device 22 transmission 23 electric motor 24 second drive device 25a to 25f secondary elements 26 primary cells 27 solids outlet 28

Claims (13)

  1. Full-jacket helical conveyor centrifuge (I), having
    a) a rotatably disposed, metallic drum (2) with a horizontal axis of rotation,
    b) at least one drive device for the drum (2),
    c) a helical conveyor (3) which is rotatably disposed at a differential rotational speed with respect to the rotational speed of the drum (2) and which can be rotated by way of a gearing by means of the first drive device for the drum or by way of another device for the helical conveyor (6),
    characterized in that
    d) at least the drive device for the drum (2) has at least one electromagnetic direct drive (25a-f),
    e) whose primary or secondary elements (26) are arranged directly at or on the drum (2) or at or on a part (6, 17, 18, 19, 20) non-rotatably connected with the drum (2),
    f) and its corresponding secondary or primary elements (27) are arranged at a distance with respect to these without contact outside the drum (2) or the part (6, 17, 18, 19, 20) non-rotatably connected with the drum (2),
    g) the propulsion force being able to be generated in a gearless manner by an electromagnetic field of travelling waves advancing around the drum (2) or around the part (6, 17, 18, 19, 20) non-rotatably connected with the drum (2), wherein
    h) the secondary elements (26) of the at least one direct drive (25a-f) are arranged on the outer periphery of the drum (2) or on the outer periphery of the part (6, 17, 18, 19, 20) non-rotatably connected with the drum (2), and the primary elements (27) are in each case arranged radially outside the secondary elements (26) at a distance from these without contact.
  2. Full-jacket helical conveyor centrifuge according to Claim 1, characterized in that the ratio between the inner axial dimension of the drum (2) and its inside diameter is greater than 1, particularly greater than 2.5.
  3. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the primary and/or the secondary elements (27) surround the drum (2) completely or in sections concentrically and are used for generating the field of travelling waves.
  4. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the drive device for the drum (2) has several of the electromagnetic direct drives (25a-f).
  5. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that at least one or more of the electromagnetic drives (25a-f) is/are arranged on an attachment of the drum (2) as an axial extension of the drum (2).
  6. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the cylindrical attachment (18, 19, 20) is arranged in the axial direction between the main bearings (15, 16).
  7. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the cylindrical attachment (17) is arranged on the outer periphery of the conical section (2b) of the drum (2).
  8. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the cylindrical attachment is a chamber (6) for receiving a centripetal pump (7).
  9. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the primary elements (27) surround the drum in sections and the secondary elements (26) surround the drum completely.
  10. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that a plurality of successively controllable coils are distributed on the outer periphery of the drum as primary elements (27) for generating the field of travelling waves which travels around the drum and in the process takes along a plurality of the, in particular, permanent-magnetic secondary elements (26).
  11. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the drum (2) has at least one play-free bearing (15, 16) around which or directly adjacent to which the respective electromagnetic direct drive is arranged.
  12. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that an additional co-rotating field of travelling waves motor generates the differential rotational speed between the helical conveyor and the drum.
  13. Full-jacket helical conveyor centrifuge according to one of the preceding claims, characterized in that the drive device for the helical conveyor is constructed independently of the drive device for the drum.
EP04741196.2A 2003-07-25 2004-07-21 Full jacket helical conveyor centrifuge with direct drive Expired - Fee Related EP1648614B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334370A DE10334370A1 (en) 2003-07-25 2003-07-25 Solid bowl screw centrifuge with direct drive
PCT/EP2004/008154 WO2005011871A1 (en) 2003-07-25 2004-07-21 Full jacket helical conveyor centrifuge with direct drive

Publications (2)

Publication Number Publication Date
EP1648614A1 EP1648614A1 (en) 2006-04-26
EP1648614B1 true EP1648614B1 (en) 2017-05-03

Family

ID=34088897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04741196.2A Expired - Fee Related EP1648614B1 (en) 2003-07-25 2004-07-21 Full jacket helical conveyor centrifuge with direct drive

Country Status (6)

Country Link
US (1) US7438678B2 (en)
EP (1) EP1648614B1 (en)
JP (1) JP2006528548A (en)
DE (1) DE10334370A1 (en)
DK (1) DK1648614T3 (en)
WO (1) WO2005011871A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK1479443T3 (en) * 2003-05-19 2006-03-27 Andritz Guinard S A S Drive system for a centrifugal separator
DE10334370A1 (en) * 2003-07-25 2005-02-24 Westfalia Separator Ag Solid bowl screw centrifuge with direct drive
DE10336350B4 (en) * 2003-08-08 2007-10-31 Westfalia Separator Ag Solid bowl centrifuge, with paring disc
DE102004009087B4 (en) 2004-02-25 2009-04-02 Infineon Technologies Ag Method for adjusting the breakdown voltage of a thyristor
DE102004034409A1 (en) * 2004-07-16 2006-02-02 Hiller Gmbh Drive device for worm centrifuges
DE102006028803A1 (en) * 2006-06-23 2007-12-27 Westfalia Separator Ag screw centrifuge
DE102006042968A1 (en) * 2006-09-13 2008-03-27 Schaeffler Kg Drive device for separators
DE102008015134A1 (en) 2008-03-20 2009-10-01 Gea Westfalia Separator Gmbh Gear arrangement for a centrifuge
CA2854413C (en) * 2008-04-22 2016-12-13 Pneumatic Scale Corporation Single use centrifuge system
US10040077B1 (en) 2015-05-19 2018-08-07 Pneumatic Scale Corporation Centrifuge system including a control circuit that controls positive back pressure within the centrifuge core
CA2810450A1 (en) * 2010-09-13 2012-03-22 Hiller Gmbh Drive device in a helical conveyor centrifuge
CN102901341A (en) * 2012-09-29 2013-01-30 宝鸡石油机械有限责任公司 Vertical rock debris drying machine driven by variable frequency motor
CN103016697B (en) * 2012-12-03 2016-06-15 江苏巨能机械有限公司 A kind of differential lubricating device of improvement
DE102017128027A1 (en) * 2017-11-27 2019-05-29 Gea Mechanical Equipment Gmbh separator
DE102019126980B4 (en) 2019-10-08 2022-10-20 Hirschvogel Umformtechnik Gmbh electrical machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7426632U (en) 1975-04-17 Dwinger H Timepiece
DE1732887U (en) * 1956-06-21 1956-10-25 Flottweg Motoren Werk Dr Georg SCREW CENTRIFUGE FOR CONTINUOUS CLEANING OF LIQUIDS.
DE2811887C2 (en) * 1978-03-18 1991-07-18 Westfalia Separator Ag, 4740 Oelde Drive for a continuously working screw centrifuge
DE3325566A1 (en) * 1983-07-15 1985-01-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Apparatus for driving centrifuges
DE3407593A1 (en) 1984-03-01 1985-09-05 Gesellschaft für Kernverfahrenstechnik mbH, 5170 Jülich DRIVE FOR CENTRIFUGES
DE3834222C2 (en) * 1988-10-07 1994-01-20 Magnet Motor Gmbh centrifuge
FR2644356B1 (en) * 1989-03-20 1992-11-20 Jouan PROCESS OF CONCENTRATION OF SAMPLES BY EVAPORATION OF THE SOLVENT AND CENTRIFUGAL EVAPORATOR-CONCENTRATOR FOR THE IMPLEMENTATION OF THIS PROCESS
US5714858A (en) * 1995-03-24 1998-02-03 Nuova M.A.I.P. Macchine Agricole Industriali Pieralisi S.P.A. Device for controlling and regulating the relative speed between rotary components interacting with one another respectively connected to the rotor and stator of an electric motor
DE19801767C1 (en) * 1998-01-19 1999-10-07 Fresenius Ag centrifuge
DK1479443T3 (en) * 2003-05-19 2006-03-27 Andritz Guinard S A S Drive system for a centrifugal separator
DE10334370A1 (en) * 2003-07-25 2005-02-24 Westfalia Separator Ag Solid bowl screw centrifuge with direct drive
DE102004034409A1 (en) * 2004-07-16 2006-02-02 Hiller Gmbh Drive device for worm centrifuges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE10334370A1 (en) 2005-02-24
EP1648614A1 (en) 2006-04-26
DK1648614T3 (en) 2017-07-31
US20060183621A1 (en) 2006-08-17
US7438678B2 (en) 2008-10-21
JP2006528548A (en) 2006-12-21
WO2005011871A1 (en) 2005-02-10

Similar Documents

Publication Publication Date Title
EP1648614B1 (en) Full jacket helical conveyor centrifuge with direct drive
DE2549314A1 (en) DECANTING CENTRIFUGE
DE69320602T2 (en) Centrifugal concentration machine
EP2032264B1 (en) Helical conveyor centrifuge having a drive device
EP3476488A1 (en) Decanter centrifuge
EP1618961B1 (en) Drive device for screw centrifuges
DE3046946A1 (en) DECANTER CENTRIFUGE
DE2024838A1 (en) Centrifuge for separating solid components from a liquid
EP3833486B1 (en) Solid bowl screw centrifuge
DE60208666T2 (en) DECANTER CENTRIFUGE WITH A TRANSMISSION MOUNTED ON THE DRUM
DE19806374C1 (en) Split drive for large centrifugal decanter
EP1949966B1 (en) Solid wall helical centrifuge with pressure plate
DE10331732A1 (en) centrifuge
DE102019128562A1 (en) Solid bowl screw centrifuge
DE102022100511A1 (en) Solid bowl centrifuge and method of controlling the separation process of the solid bowl centrifuge
WO2021064025A1 (en) Solid-bowl screw centrifuge
DE102019110996A1 (en) Solid bowl screw centrifuge
DE102012004548B4 (en) Drum centrifuge with an inlet acceleration device and an outlet brake device
DE2908455C2 (en) Sieve pocket centrifuge
DE102016115557A1 (en) Centrifuge with a paring disc
DE450899C (en) Uninterrupted centrifugal separator for separating a liquid from solids, especially for the sugar industry
DE3918092A1 (en) Stirrer mill
DE3622655A1 (en) Decanting centrifuge
DE1482710A1 (en) centrifuge
DE102004035207A1 (en) Filtration device comprises container having multilayer filter plates on rotated hollow spindles, with local centrifugal fields around spindles and upwardly centrifugal flow in container

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060106

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK FR GB IT SE

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE DK FR GB IT SE

17Q First examination report despatched

Effective date: 20071112

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WESTFALIA SEPARATOR GMBH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GEA WESTFALIA SEPARATOR GMBH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GEA MECHANICAL EQUIPMENT GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160831

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20161123

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20170321

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502004015522

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20170728

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502004015522

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20180206

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190805

Year of fee payment: 16

Ref country code: SE

Payment date: 20190723

Year of fee payment: 16

Ref country code: IT

Payment date: 20190731

Year of fee payment: 16

Ref country code: DK

Payment date: 20190725

Year of fee payment: 16

Ref country code: FR

Payment date: 20190725

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20190724

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004015522

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20200731

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200721

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200721

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210202

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200722

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200721