EP1899074A1 - Helical conveyor centrifuge - Google Patents

Helical conveyor centrifuge

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Publication number
EP1899074A1
EP1899074A1 EP06754987A EP06754987A EP1899074A1 EP 1899074 A1 EP1899074 A1 EP 1899074A1 EP 06754987 A EP06754987 A EP 06754987A EP 06754987 A EP06754987 A EP 06754987A EP 1899074 A1 EP1899074 A1 EP 1899074A1
Authority
EP
European Patent Office
Prior art keywords
hollow shaft
screw
inlet pipe
centrifuge according
screw centrifuge
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.)
Granted
Application number
EP06754987A
Other languages
German (de)
French (fr)
Other versions
EP1899074B1 (en
Inventor
Günter Haider
Klaus Klinger
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.)
Hiller GmbH
Original Assignee
Hiller 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 Hiller GmbH filed Critical Hiller GmbH
Publication of EP1899074A1 publication Critical patent/EP1899074A1/en
Application granted granted Critical
Publication of EP1899074B1 publication Critical patent/EP1899074B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • 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
    • 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
    • B04B2001/2033—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 with feed accelerator inside the conveying screw

Definitions

  • the invention has for its object to improve a worm centrifuge of the specified type so that the risk of backflow at the end of the inlet pipe effective be prevented, so that the risk of deposits by refluxing mixture is effectively prevented.
  • the inlet pipe passes through a protective tube which delimits the annular space from the cavity of the hollow shaft, the suction flow is considerably accelerated due to the relatively small cross section of the annular space, which counteracts an undesirable reflux even more efficiently.
  • the Luftabsaugorgan has a central inlet region into which the feed chamber leading end of the inlet pipe protrudes, wherein the shipsabsaugorgan can be designed for a structurally very simple and inexpensive solution as impeller part of a centrifugal pump.
  • This impeller part may be formed integrally with the hollow shaft and has suction channels, which emanate from the central inlet region and lead with opposite to the direction of rotation of the hollow shaft curved course to the spiral screw.
  • Figure 2 is an enlarged partial view of the screw conveyor in the region of the feed chamber corresponding to the section II-II of Figure 3 and
  • FIG. 1 it can be seen that in a partially indicated housing 10 in bearings 12, a rotor drum 14 is rotatably mounted, which is driven by a motor 16.
  • the rotor drum 14 is composed of a cylindrical portion 18 and a conical portion 20.
  • a screw conveyor 22 is rotatably mounted, which is driven by a motor 24 at a generally slightly higher speed than the rotor drum 14.
  • the worm gear 26 of the screw conveyor 24 is mounted on a hollow shaft 28 and arranged so that the conveying direction from the cylindrical portion 18 to the conical portion 20 takes place.
  • a feed pipe 30 is arranged for the mixture to be separated, which enters in the direction of arrow 32 in the inlet pipe 30.
  • the inlet pipe 30 extends through a coaxial protective tube 34, which is fixedly connected to the hollow shaft 28 and the cavity 36 of the hollow shaft 28 delimits from the annular space 38, which includes the inlet pipe 30.
  • a Luftabsaugorgan 58 is provided which has a central inlet region 60, into which the feed chamber 42 leading end 40 of the feed pipe 30 protrudes .
  • the Heilabsaugorgan 58 is, as is apparent in particular from Figure 3, as impeller part 62 of a centrifugal pump and integrally formed with the hollow shaft 28.
  • the impeller part 62 has suction channels 64, which start from the central inlet region 60 and, with a curved course opposite to the direction of rotation r (see FIG. 3) of the hollow shaft 28, lead to the helix 26.
  • the suction channels 64 are, as shown in FIGS. 2 and 3, incorporated in the hollow shaft 28.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

The invention relates to a helical conveyor centrifuge which is used to continuously separate flowing materials having different densities and which comprises a rotor drum (14) having discharge openings (54) which are arranged in a conical section (20) of the rotor wall for the heavy phase (56) and defence openings (48) which are provided on a front wall (46) which closes the rotor drum (14) for the light phase (50), a conveying screw (22) which can be rotated inside the rotor drum (14) comprising a helix (26) of the screw which is applied to a hollow shaft (28) and which is used to transport the heavy phase (56) to the discharge openings (54), in addition to a mixing supply tube (30) which is arranged in a coaxial manner inside the hollow shaft (28), which leads to a supply chamber (42) which is formed in the hollow shaft (28), from which the discharge openings (44) lead to the helix (26) of the screw. An air suction element (58) is provided upstream from the supply chamber in the direction of transportation (32) of the supply tube (30), said air suction element producing a suction current in the same direction in relation to the direction of transportation (32) in the supply tube (30) in the annular chamber (38) which surrounds the supply tube (30). The air suction element (58) can be embodied in an advantageous manner as a running wheel part (62) of a centrifugal pump.

Description

Hiller GmbH Hiller GmbH
Schwalbenholzstraße 2Schwalbenholzstraße 2
84137 Vilsbiburg84137 Vilsbiburg
Schneckenzentrifugescrew centrifuge
Beschreibungdescription
Die Erfindung betrifft eine Schneckenzentrifuge zum kontinuierlichen Trennen fließfähiger Stoffe unterschiedlicher Dichte nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a screw centrifuge for continuously separating flowable substances of different densities according to the preamble of patent claim 1.
Bei derartigen Schneckenzentrifugen ist eine kritische Stelle dort, wo das Gemisch- Zulaufrohr in die Aufgabekammer führt, weil hier die Gefahr besteht, daß Teile des Gemisches aufgrund von Turbulenzen oder von zu hohen Durchsätzen in den Hohlraum der Hohlwelle zurückströmen und sich innerhalb des Hohlraumes der Förderschnecke ablagern. Um hier Abhilfe zu schaffen, sind bei bekannten Konstruktionen Öffnungen in der Wand der Hohlwelle der Förderschnecke vorgesehen, durch die diese Produktablagerungen in den Bereich der Schneckenwendel entweichen können. Allerdings besteht hierbei die Gefahr, daß die Produktablagerungen in dem Hohlraum und insbesondere in dessen Toträumen mit der Zeit anbacken und damit eine Unwucht an der rotierenden Förderschnecke erzeugen.In such screw centrifuges is a critical point where the mixture feed tube leads into the feed chamber, because there is a risk that parts of the mixture due to turbulence or too high flow rates back into the cavity of the hollow shaft and within the cavity of the screw conveyor deposit. To remedy this situation, openings in the wall of the hollow shaft of the screw conveyor are provided in known constructions through which these product deposits can escape into the area of the screw helix. However, there is a risk that the product deposits in the cavity and in particular in the dead space caking with time and thus generate an imbalance on the rotating auger.
Es wurde daher in der Vergangenheit versucht, das Problem der Produktablagerungen in dem verhältnismäßig großen Hohlraum der Förderschnecke dadurch zu umgehen, daß innerhalb der Hohlwelle ein Schutzrohr angebracht wurde, durch das hindurch das Gemisch-Zulaufrohr zur Aufgabekammer führt. Bei dieser Lösung ist jedoch das Problem nur teilweise gelöst, da immer noch die Gefahr besteht, daß sich der verhältnismäßig enge Ringraum zwischen dem Schutzrohr und dem Gemisch-Zulaufrohr durch rückströmende Gemischteile zusetzt.It has therefore been attempted in the past to circumvent the problem of product deposits in the relatively large cavity of the screw conveyor in that within the hollow shaft, a protective tube has been attached, through which the mixture feed pipe leads to the feed chamber. In this solution, however, the problem is only partially solved, since there is still the danger that the relatively narrow annular space between the protective tube and the mixture inlet tube is added by flowing back mixture.
Der Erfindung liegt die Aufgabe zugrunde, eine Schneckenzentrifuge der angegebenen Bauart so zu verbesseren, daß die Gefahr von Rückströmungen am Ende des Zulaufrohres wirksam verhindert werden, so daß die Gefahr von Ablagerungen durch rückfließende Gemischteile wirksam verhindert wird.The invention has for its object to improve a worm centrifuge of the specified type so that the risk of backflow at the end of the inlet pipe effective be prevented, so that the risk of deposits by refluxing mixture is effectively prevented.
Zur Lösung dieser Aufgabe ist bei der Schneckenzentrifuge erfindungsgemäß vorgesehen, daß in Förderrichtung des Zulaufrohres vor der Aufgabekammer ein Luftabsaugorgan vorgesehen ist, das in dem das Zulaufrohr einschließenden Ringraum eine zur Förderrichtung im Zulaufrohr gleichgerichtete Saugströmung erzeugt.To solve this problem is provided according to the invention in the screw centrifuge, that in the conveying direction of the feed pipe in front of the task chamber Luftabsaugorgan is provided which generates in the inlet pipe enclosing the annulus a rectified to the conveying direction in the inlet pipe suction flow.
Durch diese Saugströmung am Außenumfang des Zulaufrohres wird ein Rückfluß von Gemischteilen zurück in den Hohlraum der Hohlwelle mit einfachen Mitteln verhindert, weil die Saugströmung einer derartigen Rückströmung entgegenwirkt und Gemischpartikel am Eintritt in den Ringraum hindert.By this suction flow on the outer circumference of the inlet pipe a backflow of mixture parts back into the cavity of the hollow shaft is prevented by simple means, because the suction flow counteracts such a backflow and prevents mixture particles at the entrance into the annulus.
Wenn in Weiterbildung der Erfindung das Zulaufrohr durch ein Schutzrohr hindurch verläuft, das den Ringraum von dem Hohlraum der Hohlwelle abgrenzt, wird die Saugströmung aufgrund des verhältnismäßig geringen Querschnittes des Ringraumes erheblich beschleunigt, was einem unerwünschten Rückfluß noch effizienter entgegenwirkt.If, in a further development of the invention, the inlet pipe passes through a protective tube which delimits the annular space from the cavity of the hollow shaft, the suction flow is considerably accelerated due to the relatively small cross section of the annular space, which counteracts an undesirable reflux even more efficiently.
In Weiterbildung der Erfindung hat das Luftabsaugorgan einen zentrischen Eintrittsbereich, in den das zur Aufgabekammer führende Ende des Zulaufrohres hineinragt, wobei das Luftabsaugorgan nach einer konstruktiv sehr einfachen und günstigen Lösung als Laufradteil einer Kreiselpumpe ausgebildet sein kann.In a further development of the invention, the Luftabsaugorgan has a central inlet region into which the feed chamber leading end of the inlet pipe protrudes, wherein the Luftabsaugorgan can be designed for a structurally very simple and inexpensive solution as impeller part of a centrifugal pump.
Dieses Laufradteil kann einstückig mit der Hohlwelle ausgebildet sein und weist Saugkanäle auf, die von dem zentrischen Eintrittsbereich ausgehen und mit entgegengesetzt zur Drehrichtung der Hohlwelle gekrümmtem Verlauf zur Schneckenwendel führen.This impeller part may be formed integrally with the hollow shaft and has suction channels, which emanate from the central inlet region and lead with opposite to the direction of rotation of the hollow shaft curved course to the spiral screw.
Mit der Erfindung wird einerseits erreicht, daß sich keine Produktablagerungen in dem verhältnismäßig großen Hohlraum der Hohlwelle absetzen können, wobei gleichzeitig die Gefahr beseitigt ist, daß sich das verhältnismäßig enge Schutzrohr durch rückströmende Produktteile zusetzen kann. Das Luftabsaugorgan sorgt dafür, daß während der Rotation der Förderschnecke ständig Luft durch den Ringraum abgesaugt wird, welcher dadurch immer durchlüftet und damit von Ablagerungen freigehalten wird. Die Erfindung ist nachstehend an einem Ausführungsbeispiel erläutert, das in der Zeichnung dargestellt ist. Es zeigen:With the invention is achieved on the one hand, that no product deposits can settle in the relatively large cavity of the hollow shaft, at the same time eliminating the risk that the relatively narrow protective tube can be enforced by backflowing product parts. The Luftabsaugorgan ensures that during the rotation of the auger constantly air is sucked through the annulus, which thereby always ventilated and thus kept free of deposits. The invention is explained below with reference to an embodiment which is shown in the drawing. Show it:
Figur 1 einen schematischen Längsschnitt durch eine Schneckenzentrifuge gemäß der1 shows a schematic longitudinal section through a screw centrifuge according to the
Erfindung,Invention,
Figur 2 eine vergrößerte Teildarstellung der Förderschnecke im Bereich der Aufgabekammer entsprechend dem Schnitt II-II der Figur 3 undFigure 2 is an enlarged partial view of the screw conveyor in the region of the feed chamber corresponding to the section II-II of Figure 3 and
Figur 3 einen Querschnitt in der Ebene III-III der Figur 2.3 shows a cross section in the plane III-III of Figure 2.
In Figur 1 ist zu erkennen, daß in einem nur teilweise angedeuteten Gehäuse 10 in Lagern 12 eine Rotortrommel 14 drehbar gelagert ist, die von einem Motor 16 angetrieben wird. Die Rotortrommel 14 ist aus einem zylindrischen Abschnitt 18 und einem konischen Abschnitt 20 zusammengesetzt. In der Rotortrommel 14 ist eine Förderschnecke 22 drehbar gelagert, die von einem Motor 24 mit einer im allgemeinen etwas höheren Drehzahl als die Rotortrommel 14 angetrieben wird. Die Schneckenwendel 26 der Förderschnecke 24 ist auf einer Hohlwelle 28 angebracht und so angeordnet, daß die Förderrichtung von dem zylindrischen Abschnitt 18 zum konischen Abschnitt 20 hin erfolgt.In Figure 1 it can be seen that in a partially indicated housing 10 in bearings 12, a rotor drum 14 is rotatably mounted, which is driven by a motor 16. The rotor drum 14 is composed of a cylindrical portion 18 and a conical portion 20. In the rotor drum 14, a screw conveyor 22 is rotatably mounted, which is driven by a motor 24 at a generally slightly higher speed than the rotor drum 14. The worm gear 26 of the screw conveyor 24 is mounted on a hollow shaft 28 and arranged so that the conveying direction from the cylindrical portion 18 to the conical portion 20 takes place.
Innerhalb der Hohlwelle 28 ist ein Zulaufrohr 30 für das zu trennende Gemisch angeordnet, welches in Richtung des Pfeiles 32 in das Zulaufrohr 30 eintritt. Das Zulaufrohr 30 verläuft durch ein koaxiales Schutzrohr 34 hindurch, das fest mit der Hohlwelle 28 verbunden ist und den Hohlraum 36 der Hohlwelle 28 von dem Ringraum 38 abgrenzt, welcher das Zulaufrohr 30 einschließt.Within the hollow shaft 28, a feed pipe 30 is arranged for the mixture to be separated, which enters in the direction of arrow 32 in the inlet pipe 30. The inlet pipe 30 extends through a coaxial protective tube 34, which is fixedly connected to the hollow shaft 28 and the cavity 36 of the hollow shaft 28 delimits from the annular space 38, which includes the inlet pipe 30.
Das freie Ende 40 des Zulaufrohres 30 führt in eine in der Hohlwelle 28 ausgebildete Aufgabekammer 42, von der radiale Aufgabeöffnungen 44 in den Bereich der Schneckenwendel 26 führen.The free end 40 of the feed tube 30 leads into a feed chamber 42 formed in the hollow shaft 28, from which radial feed openings 44 lead into the area of the screw helix 26.
Der zylindrische Abschnitt 18 der Rotortrommel 14 wird durch eine Stirnwand 46 abgeschlossen, die Wehröffnungen 48 für die Abgabe der leichten Phase 50 hat, welche in eine Abgabeleitung 52 des Gehäuses 10 fließt. In den konischen Abschnitt 20 der Rotorwand sind Austragsöffhungen 54 für die schwere Phase 56 vorgesehen, die entsprechend den eingezeichneten Pfeilen von der Schneckenwendel 26 zu den Austragsöffhungen 54 transportiert wird.The cylindrical portion 18 of the rotor drum 14 is closed by an end wall 46 which has weirs 48 for the discharge of the light phase 50, which flows into a discharge line 52 of the housing 10. In the conical portion 20 of the rotor wall discharge openings 54 are provided for the heavy phase 56, which is transported according to the arrows shown by the worm gear 26 to the Austragsöffhungen 54.
Die gegenüber Figur 1 vergrößerten Darstellungen der Figuren 2 und 3 zeigen, daß in Förderrichtung 32 des Zulaufrohres 30 vor der Aufgabekammer 42 ein Luftabsaugorgan 58 vorgesehen ist, das einen zentrischen Eintrittsbereich 60 hat, in den das zur Aufgabekammer 42 führende Ende 40 des Zulaufrohres 30 hineinragt. Das Luftabsaugorgan 58 ist, wie insbesondere aus Figur 3 hervorgeht, als Laufradteil 62 einer Kreiselpumpe und einstückig mit der Hohlwelle 28 ausgebildet. Das Laufradteil 62 hat Saugkanäle 64, die von dem zentrischen Eintrittsbereich 60 ausgehen und mit entgegengesetzt zur Drehrichtung r (vgl. Figur 3) der Hohlwelle 28 gekrümmtem Verlauf zur Schneckenwendel 26 führen. Die Saugkanäle 64 sind, wie die Figuren 2 und 3 zeigen, in die Hohlwelle 28 eingearbeitet.The enlarged compared to Figure 1 representations of Figures 2 and 3 show that in the conveying direction 32 of the feed pipe 30 before the feed chamber 42, a Luftabsaugorgan 58 is provided which has a central inlet region 60, into which the feed chamber 42 leading end 40 of the feed pipe 30 protrudes , The Luftabsaugorgan 58 is, as is apparent in particular from Figure 3, as impeller part 62 of a centrifugal pump and integrally formed with the hollow shaft 28. The impeller part 62 has suction channels 64, which start from the central inlet region 60 and, with a curved course opposite to the direction of rotation r (see FIG. 3) of the hollow shaft 28, lead to the helix 26. The suction channels 64 are, as shown in FIGS. 2 and 3, incorporated in the hollow shaft 28.
Im Betrieb der Schneckenzentrifuge sorgt die Rotation der Förderschnecke 22 und damit des Laufradteils 62 dafür, daß in dem Ringraum 38 zwischen dem Schutzrohr 34 und dem Zulaufrohr 30 ständig eine Saugströmung erzeugt wird, die in Figur 2 mit gestrichelten Pfeilen eingezeichnet ist und zur Förderrichtung 32 im Zulaufrohr 30 gleichgerichtet ist. Diese Saugströmung verhindert wirksam, daß die aus dem Ende 40 des Zulaufrohrs 30 austretenden Gemischanteile vollständig in die Aufgabekammer 42 gelangen und nicht in den Ringraum 38 zurückströmen können. Der Ringraum 38 wird dadurch ständig durchlüftet und von Ablagerungen freigehalten. Selbst dann, wenn der Durchsatz V im Zulaufrohr 30 größer ist als der Durchsatz Vl durch die Aufgabeöffnungen 44, wird durch die vom Laufradteil 62 erzeugte Saugströmung ein Rückstau in den Ringraum 38 vermieden.In the operation of the screw centrifuge, the rotation of the screw conveyor 22 and thus of the impeller part 62 ensures that in the annular space 38 between the protective tube 34 and the inlet pipe 30 constantly a suction flow is generated, which is shown in Figure 2 with dashed arrows and the conveying direction 32 in Inlet pipe 30 is rectified. This suction flow effectively prevents the mixture components emerging from the end 40 of the feed pipe 30 from reaching the feed chamber 42 completely and can not flow back into the annular space 38. The annular space 38 is thus constantly ventilated and kept free of deposits. Even if the throughput V in the inlet pipe 30 is greater than the throughput Vl through the feed openings 44, a backflow into the annular space 38 is avoided by the suction flow generated by the impeller part 62.
Als weiterer Vorteil kommt hinzu, daß die erfindungsgemäß erzeugte Saugströmung in Richtung der gestrichelt eingezeichneten Pfeile eine Unterstützung darstellen, um hohe Durchsätze V realisieren zu können, so daß ein großer Teilvolumenstrom Vl durch das Kreiselpumpensystem unter Druck in den Bereich der Schneckenwendel 26 gepresst wird. A further advantage is that the suction flow generated according to the invention in the direction of the dashed arrows represent a support to realize high throughputs V, so that a large partial volume flow Vl is pressed by the centrifugal pump system under pressure in the area of the screw helix 26.

Claims

Patentansprüche claims
1. Schneckenzentrifuge zum kontinuierlichen Trennen fließfähiger Stoffe unterschiedlicher Dichte, umfassend eine Rotortrommel mit in einem konischen Abschnitt der Rotorwand angeordneten Austragsöffnungen für die schwere Phase und mit an einer die Rotortrommel abschließenden Stirnwand vorgesehenen Wehröffnungen für die leichte Phase, eine innerhalb der Rotortrommel drehbare Förderschnecke mit an einer Hohlwelle angebrachter Schneckenwendel für den Transport der schweren Phase zu den Austragsöffnungen sowie ein koaxial innerhalb der Hohlwelle angeordnetes Gemisch-Zulaufrohr, das zu einer in der Hohlwelle ausgebildeten Aufgabekammer führt, von der Aufgabeöffnungen zu der Schneckenwendel führen, dadurch gekennzeichnet, daß in Förderrichtung des Zulaufrohres (30) vor der Aufgabekammer (42) ein Luftabsaugorgan (58) vorgesehen ist, das in dem das Zulaufrohr (30) einschließenden Ringraum (38) eine zur Förderrichtung (32) im Zulaufrohr (30) gleichgerichtete Saugströmung erzeugt.A screw centrifuge for continuously separating flowable materials of different densities, comprising a rotor drum having arranged in a conical portion of the rotor wall discharge openings for the heavy phase and provided at a final wall of the rotor drum end wall openings for the light phase, rotatable within the rotor drum screw conveyor with a hollow shaft mounted screw spiral for the transport of the heavy phase to the discharge and a coaxially disposed within the hollow shaft mixture inlet pipe leading to a formed in the hollow shaft feed chamber, lead from the feed openings to the screw spiral, characterized in that in the conveying direction of the inlet pipe (30) in front of the feed chamber (42) an air suction member (58) is provided, in which the inlet pipe (30) enclosing annular space (38) to the conveying direction (32) in the inlet pipe (30) rectified suction flow produce t.
2. Schneckenzentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß das Zulaufrohr (30) durch ein Schutzrohr (34) hindurch verläuft, das den Ringraum (38) von dem Hohlraum (36) der Hohlwelle (28) abgrenzt.2. screw centrifuge according to claim 1, characterized in that the inlet pipe (30) through a protective tube (34) passes therethrough, which delimits the annular space (38) of the cavity (36) of the hollow shaft (28).
3. Schneckenzentrifuge nach Anspruch 2, dadurch gekennzeichnet, daß das Schutzrohr (34) fest mit der Hohlwelle (28) verbunden ist.3. screw centrifuge according to claim 2, characterized in that the protective tube (34) fixed to the hollow shaft (28) is connected.
4. Schneckenzentrifuge nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Luftabsaugorgan (58) einen zentrischen Eintrittsbereich (60) hat, in den das zur Aufgabekammer (42) führende Ende (40) des Zulaufrohres (30) hineinragt.4. Screw centrifuge according to one of the preceding claims, characterized in that the Luftabsaugorgan (58) has a central inlet region (60) into which the feed chamber (42) leading end (40) of the inlet tube (30) protrudes.
5. Schneckenzentrifuge nach Anspruch 4, dadurch gekennzeichnet, daß das Luftabsaugorgan (58) als Laufradteil (62) einer Kreiselpumpe ausgebildet ist.5. A screw centrifuge according to claim 4, characterized in that the Luftabsaugorgan (58) is designed as an impeller part (62) of a centrifugal pump.
6. Schneckenzentrifuge nach Anspruch 5, dadurch gekennzeichnet, daß das Laufradteil (62) einstückig mit der Hohlwelle (28) ausgebildet ist und Saugkanäle (64) aufweist, die von dem zentrischen Eintrittsbereich (60) ausgehen und mit entgegengesetzt zur Drehrichtung (r) der Hohlwelle (28) gekrümmtem Verlauf zur Schneckenwendel (26) iühren.6. screw centrifuge according to claim 5, characterized in that the impeller part (62) is formed integrally with the hollow shaft (28) and suction channels (64), of the go out central inlet region (60) and with curved opposite to the direction of rotation (r) of the hollow shaft (28) curved course to the screw helix (26).
7. Schneckenzentrifuge nach Anspruch 6, dadurch gekennzeichnet, daß die Saugkanäle (64) in die Hohlwelle (28) eingearbeitet sind. 7. screw centrifuge according to claim 6, characterized in that the suction channels (64) in the hollow shaft (28) are incorporated.
EP06754987A 2005-06-04 2006-05-03 Helical conveyor centrifuge Not-in-force EP1899074B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005025784A DE102005025784A1 (en) 2005-06-04 2005-06-04 screw centrifuge
PCT/EP2006/062026 WO2006131425A1 (en) 2005-06-04 2006-05-03 Helical conveyor centrifuge

Publications (2)

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EP1899074A1 true EP1899074A1 (en) 2008-03-19
EP1899074B1 EP1899074B1 (en) 2010-12-01

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US (1) US7862493B2 (en)
EP (1) EP1899074B1 (en)
JP (1) JP2008542011A (en)
KR (1) KR20080015505A (en)
CN (1) CN101237939B (en)
AT (1) ATE490026T1 (en)
DE (2) DE102005025784A1 (en)
WO (1) WO2006131425A1 (en)

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ATE490026T1 (en) 2010-12-15
DE502006008446D1 (en) 2011-01-13
CN101237939A (en) 2008-08-06
CN101237939B (en) 2011-07-06
US7862493B2 (en) 2011-01-04
US20090215604A1 (en) 2009-08-27
WO2006131425A1 (en) 2006-12-14
JP2008542011A (en) 2008-11-27
KR20080015505A (en) 2008-02-19
DE102005025784A1 (en) 2006-12-07
EP1899074B1 (en) 2010-12-01

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