EP2926911B1 - Centrifugeuse à vis à bol plein dotée d'une bride de fixation - Google Patents

Centrifugeuse à vis à bol plein dotée d'une bride de fixation Download PDF

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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
Authority
EP
European Patent Office
Prior art keywords
centrifuge
drum
worm
designed
flange
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.)
Active
Application number
EP15157304.5A
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German (de)
English (en)
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EP2926911A1 (fr
Inventor
Benno Vielhuber
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.)
Flottweg SE
Original Assignee
Flottweg SE
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Publication date
Application filed by Flottweg SE filed Critical Flottweg SE
Publication of EP2926911A1 publication Critical patent/EP2926911A1/fr
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Classifications

    • 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
    • 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
    • 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.

Landscapes

  • Centrifugal Separators (AREA)

Claims (10)

  1. Centrifugeuse à bol plein (10) pour décanter un produit (54) avec un tambour de centrifugeuse (12) dans lequel le produit (54) peut se trouver et comportant en présence de produit un rayon de zone d'eau (56) et avec une vis sans fin de centrifugeuse (36) se trouvant dans le tambour de centrifugeuse (12) fixée au niveau d'une de ses régions d'extrémité axiales à l'aide d'une bride de fixation (66) disposée de façon saillante vers l'intérieur dans le plan axial au niveau d'un couvercle de tambour (24) du tambour de centrifugeuse (12) et comportant au niveau d'une zone de transition (70) avec le couvercle de tambour (24) un rayon extérieur de bride (74), caractérisée en ce que le rayon extérieur de bride (74) de la bride de fixation (66) est agencé de façon à être plus grand que le rayon de zone d'eau (56).
  2. Centrifugeuse à bol plein selon la revendication 1, caractérisée en ce que le tambour de centrifugeuse (12) est fixé à l'aide de paliers de tambour (18, 20) comportant dans le plan axial un écartement de paliers de tambour (78) et la bride de fixation (66) comportant dans le plan axial une longueur de bride (76) allant de 1/10 à 1/4, notamment de 1/8 à 1/5 de l'écartement de paliers de tambour (78).
  3. Centrifugeuse à bol plein selon la revendication 1 ou 2, caractérisée en ce que la bride de fixation (66) est réalisée de façon perméable au produit (54), dans le plan radial.
  4. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la bride de fixation (66) est agencée dans le plan axial avec au moins un renfort de bride (82).
  5. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la bride de fixation (66) est réalisée de façon à se rétrécir en partant du couvercle de tambour (24), dans le plan axial, jusque dans le tambour de centrifugeuse (12), notamment à se rétrécir de façon conique.
  6. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la vis sans fin de centrifugeuse (36) est agencée avec un moyeu de vis sans fin (38) réalisé à proximité, au niveau du couvercle de tambour (24), avec un rayon de moyeu de vis sans fin (72) supérieur au rayon de zone d'eau (56).
  7. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la vis sans fin de centrifugeuse (36) est réalisée avec un moyeu de vis sans fin (38) réalisé de façon perméable au produit (54) dans la région de la bride de fixation (66), dans le plan radial.
  8. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la vis sans fin de centrifugeuse (36) est réalisée avec un moyeu de vis sans fin (38) réalisé, dans la région de la bride de fixation (66), avec au moins un renfort de moyeu (86), dans le plan axial.
  9. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la vis sans fin de centrifugeuse (36) est réalisée avec un moyeu de vis sans fin (38) agencé de façon à se rétrécir dans la région de la bride de fixation (66), en partant du couvercle de tambour (24), dans le plan axial, jusque dans le tambour de centrifugeuse (12), notamment à se rétrécir de façon conique.
  10. Centrifugeuse à bol plein selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la vis sans fin de centrifugeuse (36) est disposée au niveau de la bride de fixation (66) à l'aide d'un palier de vis sans fin (42) se trouvant à l'intérieur dans le plan radial, au niveau de la bride de fixation (66).
EP15157304.5A 2014-04-04 2015-03-03 Centrifugeuse à vis à bol plein dotée d'une bride de fixation Active EP2926911B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014104820.2A DE102014104820B3 (de) 2014-04-04 2014-04-04 Vollmantelschneckenzentrifuge mit einem Anbindeflansch

Publications (2)

Publication Number Publication Date
EP2926911A1 EP2926911A1 (fr) 2015-10-07
EP2926911B1 true EP2926911B1 (fr) 2016-07-06

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Family Applications (1)

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EP15157304.5A Active EP2926911B1 (fr) 2014-04-04 2015-03-03 Centrifugeuse à vis à bol plein dotée d'une bride de fixation

Country Status (4)

Country Link
US (1) US9381522B2 (fr)
EP (1) EP2926911B1 (fr)
DE (1) DE102014104820B3 (fr)
DK (1) DK2926911T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4563233A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563232A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563231A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563234A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
WO2025114493A1 (fr) 2023-11-30 2025-06-05 Alfa Laval Corporate Ab Décanteur centrifuge pour séparer un matériau d'alimentation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014104820B3 (de) * 2014-04-04 2015-02-19 Flottweg Se Vollmantelschneckenzentrifuge mit einem Anbindeflansch
DE102016101574B4 (de) 2016-01-29 2020-02-20 Flottweg Se Lageranordnung einer Schnecke einer Vollmantelschneckenzentrifuge
CN106622687A (zh) * 2016-11-21 2017-05-10 重庆江北机械有限责任公司 一种液‑固‑液三相卧螺离心机
DE102017103068B4 (de) * 2017-02-15 2022-12-22 Flottweg Se Herstellungsverfahren einer Vollmantelschneckenzentrifugen-Schnecke mit einer Schneckennabe

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US2679974A (en) * 1947-01-15 1954-06-01 Sharples Corp Bearing construction for continuous centrifuge
US2703676A (en) * 1947-01-15 1955-03-08 Sharples Corp Solids discharge mechanism for centrifuges
DE1002689B (de) * 1954-05-24 1957-02-14 Siteg Siebtech Gmbh Kontinuierlich arbeitende sieblose Schneckenzentrifuge
US3143504A (en) * 1960-01-05 1964-08-04 Krupp Dolberg Gmbh Solid-bowl centrifuge with discharge screw
NL6406054A (fr) * 1963-07-25 1965-01-26
CH464082A (de) * 1967-05-26 1968-10-15 Alfa Laval Ab Zentrifugale Trennvorrichtung
DE1632325B1 (de) * 1967-06-02 1970-05-27 Turbo Separator Ag Kontinuierlich arbeitende, sieblose Schneckenzentrifuge
SU347084A1 (ru) * 1970-08-24 1972-08-10 Центрифуга непрерывного действия
DK166069C (da) * 1989-12-29 1993-07-19 Alfa Laval Separation As Dekantercentrifuge
ITMC20070220A1 (it) * 2007-11-07 2009-05-08 Nuova Maip Macchine Agricole I Decanter corredato di due collettori di scarico distanziati rispettivamente per la fase liquida leggera e quella pesante.
DE102014104820B3 (de) * 2014-04-04 2015-02-19 Flottweg Se Vollmantelschneckenzentrifuge mit einem Anbindeflansch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4563233A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563232A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563231A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
EP4563234A1 (fr) 2023-11-30 2025-06-04 Alfa Laval Corporate AB Centrifugeuse décanteuse pour séparer la matière d'alimentation
WO2025114493A1 (fr) 2023-11-30 2025-06-05 Alfa Laval Corporate Ab Décanteur centrifuge pour séparer un matériau d'alimentation

Also Published As

Publication number Publication date
US20150283559A1 (en) 2015-10-08
DK2926911T3 (en) 2016-10-24
US9381522B2 (en) 2016-07-05
EP2926911A1 (fr) 2015-10-07
DE102014104820B3 (de) 2015-02-19

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