EP2926911B1 - Solid bowl worm centrifuge with a connection flange - Google Patents
Solid bowl worm centrifuge with a connection flange Download PDFInfo
- Publication number
- EP2926911B1 EP2926911B1 EP15157304.5A EP15157304A EP2926911B1 EP 2926911 B1 EP2926911 B1 EP 2926911B1 EP 15157304 A EP15157304 A EP 15157304A EP 2926911 B1 EP2926911 B1 EP 2926911B1
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- EP
- European Patent Office
- Prior art keywords
- centrifuge
- drum
- worm
- designed
- flange
- Prior art date
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- 239000007787 solid Substances 0.000 title description 16
- 239000000463 material Substances 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 239000012071 phase Substances 0.000 description 3
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
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- 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
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- 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
- B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings
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- 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
- B04B2001/2041—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 baffles, plates, vanes or discs attached to the conveying screw
-
- 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
- B04B2001/2083—Configuration of liquid outlets
Definitions
- the invention relates to a Vollmantelschneckenzentrifuge for clarifying Good, with a centrifuge drum in which the good can be and then has a pond radius, and with a located in the centrifuge drum centrifuge screw, which is mounted at one of its axial end portions by means of a Anbindeflansches, the is arranged axially inwardly projecting on a drum cover of the centrifuge drum and has a flange outer radius at a transition to the drum cover.
- Solid bowl centrifuges which are also referred to as decanters, have a generally horizontally arranged centrifuge drum in which a centrifuge screw is located.
- the centrifuge screw rotates to discharge separated dry phase relative to the centrifuge drum and is rotatably supported therein.
- decanters in so-called "long version" known, which have about a diameter-length ratio of 1 to 4 and separation technology are particularly advantageous.
- the bending stiffness of the then also comparatively slim centrifuge screw suffers.
- the aim is also to increase the pond depth of the material to be clarified or to make the pond radius correspondingly small.
- the centrifuge screw with its screw hub must also be designed to be slim whereby the bending stiffness of the centrifuge screw also decreases, whereas the susceptibility to vibration of the centrifuge screw increases.
- the invention has for its object to provide a solid bowl screw centrifuge or a decanter, the centrifuge screw can have a comparatively high bending stiffness.
- This object is inventively provided with a Vollmantelschneckenzentrifuge for clarifying Good, with a centrifuge drum in which the good can be and then has a pond radius, and with a located in the centrifuge drum centrifuge screw, which is mounted at one of its axial end portions by means of a Anbindeflansches is, which is arranged axially inwardly projecting on a drum cover of the centrifuge drum and at a transition to the drum cover has a flange outer radius, wherein the flange outer radius of the Anbindeflansches is designed to be greater than the pond radius.
- the Anbindeflansches on a drum cover it is possible that its flange outer radius or flange diameter is designed to be larger than in conventional solid bowl centrifuges.
- the flange outer radius is greater than the pond radius.
- the tether flange according to the invention thus so dives into the estate to be clarified.
- the design of this type is therefore particularly surprising because the Anbindeflansch is basically surrounded by the screw hub radially outside and therefore also this screw hub is immersed in the material to be clarified.
- Such a design is initially counterproductive with regard to the highest possible separation result, but it leads to a significantly increased rigidity the arrangement of the centrifuge screw within the centrifuge drum and is therefore targeted according to the invention.
- the Anbindeflansch is connected to the drum cover radially further out and stored stiffer accordingly. As a result, the entire connecting flange itself is stiffer and with it also the centrifuge screw mounted thereon.
- the centrifuge drum is mounted by means of two drum bearings, which have a drum bearing distance axially, and the attachment flange has axially a flanged length of 1/10 to 1/4, in particular from 1/8 to 1/5, of the drum bearing clearance.
- Anbindefanansch an optimum in terms of a variety of parameters is found in a simple manner.
- a Vollmantelschneckenzentrifuge be provided, which creates a high separation result with a small pond radius and a correspondingly large pond depth Tiefteichversion.
- the screw hub radius can be kept very small, without the centrifuge screw loses rigidity.
- the rigidity of the centrifuge screw can even be increased in comparison with known solid bowl centrifuges.
- connection flange is made radially permeable to good.
- the clarified Good can then pass through the Anbindeflansch in particular to outlet, which are located radially further inward than the flange radius.
- outlet openings may be provided in a conventional manner with weirs, in particular weir plates, in order to adjust the pond depth by means of these.
- the attachment flange is preferably also designed with at least one axially aligned flange rib.
- the tether flange according to the invention therefore does not have to be solid or designed as a solid material, but can be shaped in particular as a rib structure in order to reduce the inertial mass of the centrifuge drum be.
- the at least one flanged rib provided an axially directed stiffening between the bearing supporting the centrifuge screw and the drum cover.
- the flange outer radius according to the invention is then fixed with the drum cover at the radially outermost point of the flange rib.
- the attachment flange of the drum cover is preferably tapered starting from the axial direction in the centrifuge drum, in particular conically tapered designed.
- the taper creates a cross-sectional shape for the attachment flange which is advantageously adapted to the bending moment curve or transverse force profile on the attachment flange.
- the Anbindflansch is kept as light as possible with respect to its inertial mass.
- a tapering in the axial direction into the centrifuge drum shape is advantageous for the design of the surrounding the Anbindeflansch screw hub.
- the screw hub according to the invention is correspondingly designed to be particularly advantageous on the drum cover adjacent to a helical hub radius which is greater than the pond radius.
- the centrifuge screw is preferably designed with a screw hub, which is designed to be radially permeable to good in the region of the Anbindeflansches.
- the screw hub is preferably designed in the region of the Anbindeflansches with at least one axially aligned hub rib.
- the screw hub is also advantageous starting in the region of the Anbindeflansches from the drum lid axially into the centrifuge drum into it, in particular conically tapering designed.
- the centrifuge screw is also advantageously mounted by means of a screw bearing on the connecting flange, which is located radially on the inside of the connecting flange.
- the worm bearing which supports the worm hub on the attachment flange, would be arranged radially on the outside around the tying flange, which is generally circular in cross-section.
- the Anbindflansch would be inside, the screw bearing outside and outside then the screw hub.
- the screw hub is radially inward, then follows outward the worm bearing and outside this is then surrounded by the Anbindeflansch. With this structural design, it is possible to make the Anbindeflansch stiffer than before, which has an advantageous effect on the supporting effect and thus advantageous to the overall vibration behavior of the centrifuge screw.
- a solid bowl centrifuge 10 with its rotatable centrifuge drum 12 is shown.
- the centrifuge drum 12 is surrounded by a stationary drum housing 14 and can be driven on one of its front sides by means of a centrifuge drive 16.
- the centrifuge drum 12 is mounted for this purpose with a first drum bearing 18 and a second drum bearing 20.
- the first drum bearing 18 is supported on a first drum flange 22, which in turn is fixedly mounted on a first drum cover 24.
- the first drum cover 24 is adjoined by a cylindrical drum shell section 26, which merges into a conical drum shell section 28.
- the conical Drum shell portion 28 then terminates at a second drum cover 30, to which finally a second drum flange 32 for supporting the second drum bearing 20 is fixedly mounted.
- the centrifuge drum 12 is mounted in a substantially horizontally aligned position on a centrifuge frame 34, which is only partially illustrated.
- centrifuge screw 36 In the centrifuge drum 12 is a centrifuge screw 36, which is formed with a radially inwardly located screw hub 38 and a surrounding this helix 40.
- the worm hub 38 is rotatably supported within the centrifuge drum 12 by a first worm bearing 42 and a second worm bearing 44.
- a worm shaft 46 By means of a worm shaft 46, the centrifuge screw 36 from the centrifuge drive 16 can be driven from the outside.
- the centrifuge drum 12 Into the centrifuge drum 12 further leads from the outside an inlet tube 48 through the first drum flange 22 and the first drum cover 24 into an inlet chamber 52.
- the inlet tube 48 thus extends along a central centrifuge axis 50 and serves to feed Good 54, in this case sewage sludge into the Interior or the interior of the centrifuge drum 12 so that the material 54 can be separated into different heavy phases therein and in particular clarified in this way. Due to the centrifugal force arising in the rotating centrifuge drum 12, the material 54 engages inwardly against the cylindrical drum shell section 26 and the conical drum shell section 28, resulting in a pond radius 56.
- the pond radius 56 is defined or defined in particular by a first outlet 58 for liquid phase, which is designed in the form of a plurality of outlet openings 60 on the first drum cover 24.
- the outlet openings 60 are distributed around the centrifuge axis 50 around the drum cover 24 evenly spaced and outside partially closed by means of a respective weir plate 62.
- the weir plates 62 are overflowed by flowing Good 54 liquid phase. Their radial position thus defines the pond radius 56.
- the first drum cover 24 is concentric to this inside an axially inwardly projecting Anbindeflansch 66.
- the Anbindeflansch 66 carries or supports at its directed into the interior of the centrifuge drum 12 end portion of the first screw bearing 42 and defined in this way also a screw bearing clearance 68 to the second Schneckenlager 44.
- the Anbindeflansch 66 has at its transition 70 to the drum cover 24 a flange outside 74 on. In the axial direction of the Anbindeflansch 66 extends from the transition 70 with a flange length 76 in the centrifuge drum 12 inside.
- the flange outer radius 74 is smaller than the pond radius 56 and also the screw hub radius 72 is smaller than the pond radius 56.
- the flange length 76 is according to Fig. 1 in such a conventional solid bowl centrifuge 12 about 1/18 of a drum bearing distance 78 between the two drum bearings 18 and 20th
- FIG. 2 to 4 an embodiment of a solid bowl screw centrifuge 12 is illustrated in which in particular the tether 66 is designed differently than in the solid bowl screw centrifuge 12 according to Fig. 1 ,
- the tether 66 according to the Fig. 2 to 4 has at the transition 70 to a flange outer radius 74 which is greater than the associated pond radius 56.
- This Anbindeflansch 66 so immersed in the Zentrifug Schlierende Good 54 a.
- the associated outlet openings 60 for liquid phase thus protrude further with their weir plates 62 radially inwards, as this Anbindeflansch 66 protrudes radially outward.
- this tether 66 projects further axially into the interior of the centrifuge drum 12 than that according to FIG Fig. 1 , namely with a flange length 76, which is about 1/6 of the drum bearing distance 78.
- This Anbindeflansch 66 is designed with a voltage applied to the drum cover 24 flange 80, at the total preferably between four and eight, in the present case six axially and at the same time radially oriented flange ribs 82 are fixedly mounted.
- the flange ribs 82 taper and terminate in the interior of the centrifuge drum 12 at a flange bearing ring 84.
- the flange bearing ring 84 surrounds the first screw bearing 42 radially outward so that it is held stationary relative to the drum cover 24 and at the same time very rigidly supported.
- the thus lattice-shaped Anbindeflansch 66 is thus permeable to the liquid phase of the Guts 54 from radially outward to radially inward. This can therefore exit through the radially further inwardly located outlet openings 60, although the Anbindeflansch 66 projects further radially outward. It is thus a Vollmantelschneckenzentrifuge 10 with a particularly small pond radius 56 and a relatively large pond depth with stiff storage of the associated centrifuge screw 36 created.
- the associated screw hub 38 of this centrifuge screw 36 is in the axial region of the Anbindeflansches 66 according to the Fig. 2 to 4 designed by means of a total of preferably between six and ten, in the present case eight hub ribs 86 which extend obliquely to the centrifuge axis 50 axially and at the same time radially directed.
- the hub ribs 86 are connected to each other at their ends facing the drum cover 24 by means of a helical hub end ring 88.
- the other ends of the hub ribs 86 are fixedly attached to the otherwise unchanged, substantially hollow cylindrical screw hub 38, whereby the hub ribs 86 in the axial region of the Anbindeflansches 66 immersed in the Gut 54 form a supporting skeleton for the radially outwardly located screw flight 40. In the process, this support skeleton also dips into the material 54 and is permeable to the material 54, in particular from radially outside to radially inside.
- a screw hub bearing ring 90 protrudes radially from the drum cover 24 and protrudes radially inward into the screw bearing 42.
- the screw hub 38 is mounted or supported radially inwardly on the worm bearing 42, while the worm bearing 42 is radially outwardly supported by the Anbindeflansch 66 in a statically particularly advantageous manner.
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- Centrifugal Separators (AREA)
Description
Die Erfindung betrifft eine Vollmantelschneckenzentrifuge zum Klären von Gut, mit einer Zentrifugentrommel, in der sich das Gut befinden kann und dann einen Teichradius aufweist, und mit einer sich in der Zentrifugentrommel befindenden Zentrifugenschnecke, die an einem ihrer axialen Endbereiche mittels eines Anbindeflansches gelagert ist, der an einem Trommeldeckel der Zentrifugentrommel axial nach innen abstehend angeordnet ist und an einem Übergang zum Trommeldeckel einen Flanschaußenradius aufweist.The invention relates to a Vollmantelschneckenzentrifuge for clarifying Good, with a centrifuge drum in which the good can be and then has a pond radius, and with a located in the centrifuge drum centrifuge screw, which is mounted at one of its axial end portions by means of a Anbindeflansches, the is arranged axially inwardly projecting on a drum cover of the centrifuge drum and has a flange outer radius at a transition to the drum cover.
Vollmantelschneckenzentrifugen, die auch als Dekanter bezeichnet werden, weisen eine in der Regel waagrecht angeordnete Zentrifugentrommel auf, in der sich eine Zentrifugenschnecke befindet. Die Zentrifugenschnecke dreht sich zum Austragen von separierter trockener Phase relativ zur Zentrifugentrommel und ist dazu in dieser drehbar gelagert. Es sind Dekanter in so genannter "langer Ausführung" bekannt, die etwa ein Durchmesser-Längen-Verhältnis von 1 zu 4 aufweisen und trenntechnisch besonders vorteilhaft sind. Bei derart schlanken Dekantern leidet jedoch die Biegesteifigkeit der dann ebenfalls vergleichsweise schlanken Zentrifugenschnecke. In bestimmten Anwendungen, wie z.B. bei der Klärschlammentwässerung, wird ferner angestrebt, die Teichtiefe des zu klärenden Gutes zu erhöhen bzw. den Teichradius entsprechend klein zu gestalten. Dann muss aber auch die Zentrifugenschnecke mit ihrer Schneckennabe entsprechend schlank gestaltet werden, womit ebenfalls die Biegesteifigkeit der Zentrifugenschnecke abnimmt, die Schwingungsanfälligkeit der Zentrifugenschnecke hingegen zunimmt.Solid bowl centrifuges, which are also referred to as decanters, have a generally horizontally arranged centrifuge drum in which a centrifuge screw is located. The centrifuge screw rotates to discharge separated dry phase relative to the centrifuge drum and is rotatably supported therein. There are decanters in so-called "long version" known, which have about a diameter-length ratio of 1 to 4 and separation technology are particularly advantageous. With such slim decanters, however, the bending stiffness of the then also comparatively slim centrifuge screw suffers. In certain applications, such as sewage sludge dewatering, the aim is also to increase the pond depth of the material to be clarified or to make the pond radius correspondingly small. Then, however, the centrifuge screw with its screw hub must also be designed to be slim whereby the bending stiffness of the centrifuge screw also decreases, whereas the susceptibility to vibration of the centrifuge screw increases.
Der Erfindung liegt die Aufgabe zugrunde, eine Vollmantelschneckenzentrifuge bzw. einen Dekanter zu schaffen, dessen Zentrifugenschnecke eine vergleichsweise hohe Biegesteifigkeit aufweisen kann.The invention has for its object to provide a solid bowl screw centrifuge or a decanter, the centrifuge screw can have a comparatively high bending stiffness.
Diese Aufgabe ist erfindungsgemäß mit einer Vollmantelschneckenzentrifuge zum Klären von Gut geschaffen, mit einer Zentrifugentrommel, in der sich das Gut befinden kann und dann einen Teichradius aufweist, und mit einer sich in der Zentrifugentrommel befindenden Zentrifugenschnecke, die an einem ihrer axialen Endbereiche mittels eines Anbindeflansches gelagert ist, der an einem Trommeldeckel der Zentrifugentrommel axial nach innen abstehend angeordnet ist und an einem Übergang zum Trommeldeckel einen Flanschaußenradius aufweist, wobei der Flanschaußenradius des Anbindeflansches größer als der Teichradius gestaltet ist.This object is inventively provided with a Vollmantelschneckenzentrifuge for clarifying Good, with a centrifuge drum in which the good can be and then has a pond radius, and with a located in the centrifuge drum centrifuge screw, which is mounted at one of its axial end portions by means of a Anbindeflansches is, which is arranged axially inwardly projecting on a drum cover of the centrifuge drum and at a transition to the drum cover has a flange outer radius, wherein the flange outer radius of the Anbindeflansches is designed to be greater than the pond radius.
Mit der erfindungsgemäßen Gestaltung des Anbindeflansches an einem Trommeldeckel ist es möglich, dass dessen Flanschaußenradius bzw. Flanschdurchmesser größer gestaltet ist als bei herkömmlichen Vollmantelschneckenzentrifugen. Erfindungsgemäß ist der Flanschaußenradius größer als der Teichradius. Der erfindungsgemäße Anbindeflansch taucht damit also in das zu klärende Gut ein. Die derartige Gestaltung ist insbesondere daher überraschend, weil der Anbindeflansch grundsätzlich auch von der Schneckennabe radial außen umgeben ist und demnach auch diese Schneckennabe in das zu klärende Gut eintaucht. Die derartige Gestaltung ist im Hinblick auf ein möglichst hochwertiges Trennergebnis zunächst kontraproduktiv, sie führt aber zu einer wesentlich erhöhten Steifigkeit der Anordndung der Zentrifugenschnecke innerhalb der Zentrifugentrommel und wird daher erfindungsgemäß gezielt angestrebt. Mit der erfindungsgemäßen Gestaltung ist der Anbindeflansch am Trommeldeckel radial weiter außen angebunden und entsprechend steifer gelagert. Dadurch ist der gesamte Anbindeflansch selbst steifer und mit ihm dann auch die daran gelagerte Zentrifugenschnecke.With the inventive design of the Anbindeflansches on a drum cover, it is possible that its flange outer radius or flange diameter is designed to be larger than in conventional solid bowl centrifuges. According to the invention, the flange outer radius is greater than the pond radius. The tether flange according to the invention thus so dives into the estate to be clarified. The design of this type is therefore particularly surprising because the Anbindeflansch is basically surrounded by the screw hub radially outside and therefore also this screw hub is immersed in the material to be clarified. Such a design is initially counterproductive with regard to the highest possible separation result, but it leads to a significantly increased rigidity the arrangement of the centrifuge screw within the centrifuge drum and is therefore targeted according to the invention. With the design according to the invention, the Anbindeflansch is connected to the drum cover radially further out and stored stiffer accordingly. As a result, the entire connecting flange itself is stiffer and with it also the centrifuge screw mounted thereon.
Bevorzugt ist die Zentrifugentrommel dabei mittels zweier Trommellager gelagert, die axial einen Trommellagerabstand aufweisen, und der Anbindeflansch weist axial eine Flanschlänge von 1/10 bis 1/4, insbesondere von 1/8 bis 1/5, des Trommellagerabstandes auf. Mit dem derart hinsichtlich seiner Flanschlänge gezielt ausgebildeten Anbindeflansch ist in einfacher Weise ein Optimum im Hinblick auf eine Vielzahl von Parametern gefunden. So kann eine Vollmantelschneckenzentrifuge bereitgestellt werden, die mit einem kleinen Teichradius und einer entsprechend großen Teichtiefe als Tiefteichversion ein hochwertiges Trennergebnis schafft. Zugleich kann der Schneckennabenradius sehr klein gehalten werden, ohne dass die Zentrifugenschnecke an Steifigkeit verliert. Idealerweise kann mit der erfindungsgemäßen Lösung die Steifigkeit der Zentrifugenschnecke im Vergleich zu bekannten Vollmantelschneckenzentrifugen sogar noch erhöht werden.Preferably, the centrifuge drum is mounted by means of two drum bearings, which have a drum bearing distance axially, and the attachment flange has axially a flanged length of 1/10 to 1/4, in particular from 1/8 to 1/5, of the drum bearing clearance. With the thus designed in terms of its flange length Anbindefanansch an optimum in terms of a variety of parameters is found in a simple manner. Thus, a Vollmantelschneckenzentrifuge be provided, which creates a high separation result with a small pond radius and a correspondingly large pond depth Tiefteichversion. At the same time, the screw hub radius can be kept very small, without the centrifuge screw loses rigidity. Ideally, with the solution according to the invention, the rigidity of the centrifuge screw can even be increased in comparison with known solid bowl centrifuges.
Damit mit der erfindungsgemäßen Vollmantelschneckenzentrifuge ein besonders hochwertiges Trennergebnis erreicht werden kann, ist es insbesondere vorteilhaft, wenn der Anbindeflansch radial für Gut durchlässig gestaltet ist. Das geklärte Gut kann dann durch den Anbindeflansch hindurch insbesondere zu Auslassöffnungen gelangen, die sich radial weiter innen befinden, als der Flanschradius. Diese Auslassöffnungen können in herkömmlicher Weise mit Wehreinrichtungen, insbesondere Wehrplatten, versehen sein, um mittels diesen die Teichtiefe einzustellen.So that a particularly high-quality separation result can be achieved with the solid bowl screw centrifuge according to the invention, it is particularly advantageous if the connection flange is made radially permeable to good. The clarified Good can then pass through the Anbindeflansch in particular to outlet, which are located radially further inward than the flange radius. These outlet openings may be provided in a conventional manner with weirs, in particular weir plates, in order to adjust the pond depth by means of these.
Der Anbindeflansch ist bevorzugt ferner mit mindestens einer axial ausgerichteten Flanschrippe gestaltet. Der erfindungsgemäße Anbindeflansch muss also nicht massiv bzw. als Vollmaterial gestaltet sein, sondern kann insbesondere zur Reduzierung der trägen Masse der Zentrifugentrommel als Rippenstruktur ausgeformt sein. Die mindestens eine Flanschrippe schaffte eine axial gerichtete Versteifung zwischen dem die Zentrifugenschnecke tragenden Lager und dem Trommeldeckel. Der erfindungsgemäße Flanschaußenradius ist dann mit dem am Trommeldeckel radial äußersten Punkt der Flanschrippe festgelegt.The attachment flange is preferably also designed with at least one axially aligned flange rib. The tether flange according to the invention therefore does not have to be solid or designed as a solid material, but can be shaped in particular as a rib structure in order to reduce the inertial mass of the centrifuge drum be. The at least one flanged rib provided an axially directed stiffening between the bearing supporting the centrifuge screw and the drum cover. The flange outer radius according to the invention is then fixed with the drum cover at the radially outermost point of the flange rib.
Ferner ist der Anbindeflansch vom Trommeldeckel vorzugsweise ausgehend axial in die Zentrifugentrommel hinein sich verjüngend, insbesondere sich konisch verjüngend, gestaltet. Die Verjüngung schafft eine an den Biegemomentenverlauf bzw. Querkraftverlauf am Anbindeflansch vorteilhaft angepasste Querschnittsform für den Anbindeflansch. Zugleich ist der Anbindflansch bezüglich seiner trägen Masse möglichst leicht gehalten. Darüber hinaus ist eine sich in axialer Richtung in die Zentrifugentrommel hinein verjüngende Form vorteilhaft für die Gestaltung der den Anbindeflansch umgebenden Schneckennabe.Furthermore, the attachment flange of the drum cover is preferably tapered starting from the axial direction in the centrifuge drum, in particular conically tapered designed. The taper creates a cross-sectional shape for the attachment flange which is advantageously adapted to the bending moment curve or transverse force profile on the attachment flange. At the same time the Anbindflansch is kept as light as possible with respect to its inertial mass. In addition, a tapering in the axial direction into the centrifuge drum shape is advantageous for the design of the surrounding the Anbindeflansch screw hub.
Die erfindungsgemäße Schneckennabe ist entsprechend insbesondere vorteilhaft am Trommeldeckel benachbart mit einem Schneckennabenradius gestaltet, der größer als der Teichradius ist. Ferner ist die Zentrifugenschnecke bevorzugt mit einer Schneckennabe gestaltet, die im Bereich des Anbindeflansches radial für Gut durchlässig ausgebildet ist. Darüber hinaus ist die Schneckennabe vorzugsweise im Bereich des Anbindeflansches mit mindestens einer axial ausgerichteten Nabenrippe gestaltet. Schließlich ist die Schneckennabe auch vorteilhaft im Bereich des Anbindeflansches vom Trommeldeckel ausgehend axial in die Zentrifugentrommel hinein sich verjüngend, insbesondere sich konisch verjüngend, gestaltet.The screw hub according to the invention is correspondingly designed to be particularly advantageous on the drum cover adjacent to a helical hub radius which is greater than the pond radius. Furthermore, the centrifuge screw is preferably designed with a screw hub, which is designed to be radially permeable to good in the region of the Anbindeflansches. In addition, the screw hub is preferably designed in the region of the Anbindeflansches with at least one axially aligned hub rib. Finally, the screw hub is also advantageous starting in the region of the Anbindeflansches from the drum lid axially into the centrifuge drum into it, in particular conically tapering designed.
Bei der erfindungsgemäßen Vollmantelschneckenzentrifuge ist schließlich ferner vorteilhaft die Zentrifugenschnecke mittels eines Schneckenlagers am Anbindeflansch gelagert, das sich radial innen am Anbindeflansch befindet. Normalerweise wäre das Schneckenlager, welches die Schneckennabe am Anbindeflansch lagert, radial außen um den in der Regel dort im Querschnitt kreisrunden Anbindeflansch herum angeordnet. Der Anbindflansch wäre also innen, das Schneckenlager außen und ganz außen dann die Schneckennabe. Bei der erfindungsgemäßen Weiterbildung ist hingegen die Schneckennabe radial innen, dann folgt nach außen das Schneckenlager und außen ist dieses dann vom Anbindeflansch umgeben. Mit dieser konstruktiven Gestaltung ist es möglich, den Anbindeflansch steifer als bisher zu gestalten, was sich vorteilhaft auf dessen Abstützwirkung und damit vorteilhaft auf das Gesamtschwingungsverhalten der Zentrifugenschnecke auswirkt.Finally, in the case of the solid bowl screw centrifuge according to the invention, the centrifuge screw is also advantageously mounted by means of a screw bearing on the connecting flange, which is located radially on the inside of the connecting flange. Normally, the worm bearing, which supports the worm hub on the attachment flange, would be arranged radially on the outside around the tying flange, which is generally circular in cross-section. The Anbindflansch would be inside, the screw bearing outside and outside then the screw hub. In the development according to the invention, however, the screw hub is radially inward, then follows outward the worm bearing and outside this is then surrounded by the Anbindeflansch. With this structural design, it is possible to make the Anbindeflansch stiffer than before, which has an advantageous effect on the supporting effect and thus advantageous to the overall vibration behavior of the centrifuge screw.
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt:
- Fig. 1
- einen Längsschnitt einer Vollmantelschneckenzentrifuge gemäß dem Stand der Technik,
- Fig. 2
- einen Längsschnitt eines Ausführungsbeispiels einer Vollmantelschneckenzentrifuge gemäß der Erfindung,
- Fig. 3
- das Detail III gemäß
Fig. 2 in vergrößertem Maßstab und - Fig. 4
- den Schnitt IV - IV gemäß
Fig. 3 .
- Fig. 1
- a longitudinal section of a solid bowl screw centrifuge according to the prior art,
- Fig. 2
- a longitudinal section of an embodiment of a solid bowl screw centrifuge according to the invention,
- Fig. 3
- the detail III according to
Fig. 2 on an enlarged scale and - Fig. 4
- the section IV - IV according to
Fig. 3 ,
In
In der Zentrifugentrommel 12 befindet sich eine Zentrifugenschnecke 36, die mit einer radial innen liegenden Schneckennabe 38 und einer diese umgebenden Schneckenwendel 40 gebildet ist. Die Schneckennabe 38 ist mit einem ersten Schneckenlager 42 und einem zweiten Schneckenlager 44 drehbar innerhalb der Zentrifugentrommel 12 abgestützt. Mittels einer Schneckenwelle 46 ist die Zentrifugenschnecke 36 vom Zentrifugenantrieb 16 von außen antreibbar.In the
In die Zentrifugentrommel 12 führt von außen ferner ein Einlassrohr 48 durch den ersten Trommelflansch 22 und den ersten Trommeldeckel 24 hindurch in eine Einlasskammer 52. Das Einlassrohr 48 erstreckt sich damit längs einer zentralen Zentrifugenachse 50 und dient zum Zuführen von Gut 54, vorliegend Klärschlamm, ins Innere bzw. den Innenraum der Zentrifugentrommel 12, damit das Gut 54 darin in verschieden schwere Phasen getrennt und insbesondere auf diese Weise geklärt werden kann. Das Gut 54 legt sich dabei aufgrund der in der sich drehenden Zentrifugentrommel 12 entstehenden Zentrifugalkraft innen an den zylindrischen Trommelmantelabschnitt 26 sowie den konischen Trommelmantelabschnitt 28 an, wodurch sich ein Teichradius 56 ergibt. Der Teichradius 56 wird insbesondere durch einen ersten Auslass 58 für flüssige Phase definiert bzw. festgelegt, der in Form mehrerer Auslassöffnungen 60 am ersten Trommeldeckel 24 ausgebildet ist. Die Auslassöffnungen 60 sind um die Zentrifugenachse 50 herum am Trommeldeckel 24 gleichmäßig beabstandet verteilt und außenseitig teilweise mittels je einer Wehrplatte 62 verschlossen. Die Wehrplatten 62 werden von abströmendem Gut 54 flüssiger Phase überströmt. Ihre radiale Lage definiert also den Teichradius 56.Into the
An der dem ersten Trommeldeckel 24 gegenüberliegenden Seite der Zentrifugentrommel 12 befindet sich im Übrigen im radial inneren Bereich des konischen Trommelabschnitts 28 ein zweiter Auslass 64 für feste Phase. Gut 54 fester Phase wird mittels der Schneckenwendel 40 entlang des konischen Trommelabschnitts 28 nach radial innen bewegt und dann durch den zweiten Auslass 64 hindurch aufgrund der Zentrifugalkraft aus der Zentrifugentrommel 12 ausgetragen.Incidentally, on the side of the
Am ersten Trommeldeckel 24 befindet sich innenseitig konzentrisch zu diesem ein axial nach innen ragender Anbindeflansch 66. Der Anbindeflansch 66 trägt bzw. stützt an seinem in das Innere der Zentrifugentrommel 12 gerichteten Endbereich das erste Schneckenlager 42 und definiert auf diese Weise auch einen Schneckenlagerabstand 68 zum zweiten Schneckenlager 44. Der Anbindeflansch 66 weist dabei an seinem Übergang 70 zum Trommeldeckel 24 einen Flanschaußenradius 74 auf. In axialer Richtung erstreckt sich der der Anbindeflansch 66 vom Übergang 70 aus mit einer Flanschlänge 76 in die Zentrifugentrommel 12 hinein. Der Flanschaußenradius 74 ist dabei kleiner als der Teichradius 56 und auch der Schneckennabenradius 72 ist kleiner als der Teichradius 56. Es taucht also weder die Schneckennabe 38 noch der Anbindeflansch 66 in das zu zentrifugierende Gut 54 ein. Die Flanschlänge 76 beträgt gemäß
In den
Ferner ragt dieser Anbindeflansch 66 weiter axial in das Innere der Zentrifugentrommel 12 hinein als der gemäß
Die zugehörige Schneckennabe 38 dieser Zentrifugenschnecke 36 ist im axialen Bereich des Anbindeflansches 66 gemäß den
Am Befestigungsbereich der Nabenrippen 86 an der restlichen Schneckennabe 38 steht radial zum Trommeldeckel 24 hin ein Schneckennabenlagerring 90 ab, der dabei in das Schneckenlager 42 radial innen hineinragt. Auf diese Weise ist die Schneckennabe 38 radial innen am Schneckenlager 42 gelagert bzw. abgestützt, während das Schneckenlager 42 radial außen von dem Anbindeflansch 66 in statisch besonders vorteilhafter Weise abgestützt ist.At the attachment region of the
- 1010
- VollmantelschneckenzentrifugeSolid bowl screw centrifuge
- 1212
- Zentrifugentrommelcentrifuge drum
- 1414
- Trommelgehäusedrum housing
- 1616
- Zentrifugenantriebcentrifuge drive
- 1818
- erstes Trommellagerfirst drum warehouse
- 2020
- zweites Trommellagersecond drum warehouse
- 2222
- erster Trommelflanschfirst drum flange
- 2424
- erster Trommeldeckelfirst drum lid
- 2626
- zylindrischer Trommelmantelabschnittcylindrical drum shell section
- 2828
- konischer Trommelmantelabschnittconical drum shell section
- 3030
- zweiter Trommeldeckelsecond drum lid
- 3232
- zweiter Trommelflanschsecond drum flange
- 3434
- Zentrifugenrahmencentrifuges frame
- 3636
- Zentrifugenschneckecentrifuges screw
- 3838
- Schneckennabescrew hub
- 4040
- Schneckenwendelscrew spiral
- 4242
- erstes Schneckenlagerfirst worm bearing
- 4444
- zweites Schneckenlagersecond screw bearing
- 4646
- Schneckenwelleworm shaft
- 4848
- Einlassrohrinlet pipe
- 5050
- Zentrifugenachsecentrifuge axis
- 5252
- Einlasskammerinlet chamber
- 5454
- GutWell
- 5656
- Teichradiuspool radius
- 5858
- erster Auslass für flüssige Phasefirst outlet for liquid phase
- 6060
- Auslassöffnung für flüssige PhaseOutlet opening for liquid phase
- 6262
- Wehrplatte für flüssige PhaseWeir plate for liquid phase
- 6464
- zweiter Auslass für feste Phasesecond outlet for solid phase
- 6666
- AnbindeflanschAnbindeflansch
- 6868
- SchneckenlagerabstandWorm bearing distance
- 7070
- Übergangcrossing
- 7272
- SchneckennabenradiusScrew hub radius
- 7474
- FlanschaußenradiusFlanschaußenradius
- 7676
- Flanschlängeflange length
- 7878
- TrommellagerabstandDrum bearing distance
- 8080
- Flanschscheibeflange
- 8282
- Flanschrippeflange rib
- 8484
- FlanschlagerringFlanschlagerring
- 8686
- Nabenrippehub rib
- 8888
- SchneckennabenendringSchneckennabenendring
- 9090
- SchneckennabenlagerringScrew hub bearing ring
Claims (10)
- Solid-bowl worm centrifuge (10) for clarifying material (54), having a centrifuge drum (12) in which the material (54) may be located and then has a pond radius (56), and having a centrifuge worm (36) which is located in said centrifuge drum (12) and is mounted, at one of its axial end regions, by means of a connecting flange (66) which is arranged, in a manner protruding axially inwards, on a drum cover (24) of the centrifuge drum (12) and has a flange outer radius (74) at a transition (70) to said drum cover (24),
characterised in that the flange outer radius (74) of the connecting flange (66) is designed to be larger than the pond radius (56). - Solid-bowl worm centrifuge according to Claim 1,
characterised in that the centrifuge drum (12) is mounted by means of two drum bearings (18, 20) which have a drum bearing interval (78) axially, and the connecting flange (66) has, axially, a flange length (76) of 1/10 to 1/4, in particular 1/8 to 1/5, of said drum bearing interval (78). - Solid-bowl worm centrifuge according to Claim 1 or 2,
characterised in that the connecting flange (66) is designed to be permeable to material (54) radially. - Solid-bowl worm centrifuge according to one of Claims 1 to 3,
characterised in that the connecting flange (66) is designed with at least one axially oriented flange rib (82). - Solid-bowl worm centrifuge according to one of Claims 1 to 4,
characterised in that the connecting flange (66) is designed in a manner starting out axially from the drum cover (24) and tapering, in particular tapering conically, into the centrifuge drum (12). - Solid-bowl worm centrifuge according to one of Claims 1 to 5,
characterised in that the centrifuge worm (36) is designed with a worm hub (38) which is designed so as to be adjacent to the drum cover (24) with a worm hub radius (72) which is larger than the pond radius (56). - Solid-bowl worm centrifuge according to one of Claims 1 to 6,
characterised in that the centrifuge worm (36) is designed with a worm hub (38) which is constructed so as to be permeable to material (54) radially in the region of the connecting flange (66). - Solid-bowl worm centrifuge according to one of Claims 1 to 7,
characterised in that the centrifuge worm (36) is designed with a worm hub (38) which is designed with at least one axially oriented hub rib (86) in the region of the connecting flange (66). - Solid-bowl worm centrifuge according to one of Claims 1 to 8,
characterised in that the centrifuge worm (36) is designed with a worm hub (38) which is designed in a manner starting out axially from the drum cover (24) in the region of the connecting flange (66) and tapering, in particular tapering conically, into the centrifuge drum (12). - Solid-bowl worm centrifuge according to one of Claims 1 to 9,
characterised in that the centrifuge worm (36) is mounted on the connecting flange (66) by means of a worm bearing (42) which is located radially on the inside on said connecting flange (66).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014104820.2A DE102014104820B3 (en) | 2014-04-04 | 2014-04-04 | Solid bowl screw centrifuge with a connecting flange |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2926911A1 EP2926911A1 (en) | 2015-10-07 |
EP2926911B1 true EP2926911B1 (en) | 2016-07-06 |
Family
ID=52430495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15157304.5A Active EP2926911B1 (en) | 2014-04-04 | 2015-03-03 | Solid bowl worm centrifuge with a connection flange |
Country Status (4)
Country | Link |
---|---|
US (1) | US9381522B2 (en) |
EP (1) | EP2926911B1 (en) |
DE (1) | DE102014104820B3 (en) |
DK (1) | DK2926911T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014104820B3 (en) * | 2014-04-04 | 2015-02-19 | Flottweg Se | Solid bowl screw centrifuge with a connecting flange |
DE102016101574B4 (en) | 2016-01-29 | 2020-02-20 | Flottweg Se | Bearing arrangement of a screw of a solid bowl centrifuge |
CN106622687A (en) * | 2016-11-21 | 2017-05-10 | 重庆江北机械有限责任公司 | Liquid-solid-liquid three-phase horizontal screw centrifuge |
DE102017103068B4 (en) * | 2017-02-15 | 2022-12-22 | Flottweg Se | Manufacturing process of a solid bowl centrifuge screw with a screw hub |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2703676A (en) * | 1947-01-15 | 1955-03-08 | Sharples Corp | Solids discharge mechanism for centrifuges |
US2679974A (en) * | 1947-01-15 | 1954-06-01 | Sharples Corp | Bearing construction for continuous centrifuge |
DE1002689B (en) * | 1954-05-24 | 1957-02-14 | Siteg Siebtech Gmbh | Continuously operating screenless screw centrifuge |
US3143504A (en) * | 1960-01-05 | 1964-08-04 | Krupp Dolberg Gmbh | Solid-bowl centrifuge with discharge screw |
NL6406054A (en) * | 1963-07-25 | 1965-01-26 | ||
CH464082A (en) * | 1967-05-26 | 1968-10-15 | Alfa Laval Ab | Centrifugal separator |
DE1632325B1 (en) * | 1967-06-02 | 1970-05-27 | Turbo Separator Ag | Continuously working, screenless screw centrifuge |
SU347084A1 (en) * | 1970-08-24 | 1972-08-10 | CENTRIFUGE CONTINUOUS ACTION | |
DK166069C (en) * | 1989-12-29 | 1993-07-19 | Alfa Laval Separation As | decanter centrifuge |
ITMC20070220A1 (en) * | 2007-11-07 | 2009-05-08 | Nuova Maip Macchine Agricole I | DECANTER EQUIPPED WITH TWO EXHAUST COLLECTORS DISTANCED RESPECTIVELY FOR THE LIGHT AND HEAVY LIQUID PHASE. |
DE102014104820B3 (en) * | 2014-04-04 | 2015-02-19 | Flottweg Se | Solid bowl screw centrifuge with a connecting flange |
-
2014
- 2014-04-04 DE DE102014104820.2A patent/DE102014104820B3/en not_active Expired - Fee Related
-
2015
- 2015-03-03 DK DK15157304.5T patent/DK2926911T3/en active
- 2015-03-03 EP EP15157304.5A patent/EP2926911B1/en active Active
- 2015-03-31 US US14/673,915 patent/US9381522B2/en active Active
Also Published As
Publication number | Publication date |
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US9381522B2 (en) | 2016-07-05 |
DE102014104820B3 (en) | 2015-02-19 |
US20150283559A1 (en) | 2015-10-08 |
EP2926911A1 (en) | 2015-10-07 |
DK2926911T3 (en) | 2016-10-24 |
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