EP3833486A1 - Centrifugeuse à vis sans fin et à bol plein - Google Patents

Centrifugeuse à vis sans fin et à bol plein

Info

Publication number
EP3833486A1
EP3833486A1 EP19749629.2A EP19749629A EP3833486A1 EP 3833486 A1 EP3833486 A1 EP 3833486A1 EP 19749629 A EP19749629 A EP 19749629A EP 3833486 A1 EP3833486 A1 EP 3833486A1
Authority
EP
European Patent Office
Prior art keywords
drum
bearings
solid bowl
screw centrifuge
bowl screw
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
EP19749629.2A
Other languages
German (de)
English (en)
Other versions
EP3833486B1 (fr
Inventor
Poul-Erik Aagaard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Mechanical Equipment GmbH
Original Assignee
GEA Mechanical Equipment GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP3833486A1 publication Critical patent/EP3833486A1/fr
Application granted granted Critical
Publication of EP3833486B1 publication Critical patent/EP3833486B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B04B2001/2083—Configuration of liquid outlets
    • 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
    • B04B2001/2091—Configuration of solids outlets

Definitions

  • the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
  • DE 22 57 513 A shows a drum of a tubular centrifuge with a cylindrical drum jacket, which is only conically shaped in sections on the inside.
  • the object of the invention is to solve this problem.
  • a solid-bowl screw centrifuge with a housing and a rotor rotatably mounted in the housing which has at least the following: a rotatable drum with an axis of rotation, the drum having a cylindrical section with a length Li and a conical section with a length L.
  • the inside and outside of the drum (based on the drum jacket) is conical.
  • the drum diameter becomes smaller on the outside and inside with increasing distance from the cylindrical section, so that the conical shape results.
  • the axis of rotation can be aligned horizontally. But it can also be oriented in a different direction, so vertically.
  • This type of construction has the advantage that the solid-bowl screw centrifuge can be operated at an advantageously high speed, since a speed-limiting first resonance frequency of the drum is achieved by the inventive arrangement of the drum bearings with reduced axial distance before at a higher speed than with a larger axial spacing of the bearings.
  • a solid-bowl screw centrifuge designed in this way can therefore be operated at a high / higher speed and therefore achieves an advantageously higher separation performance in comparison with a solid-bowl screw centrifuge of the same volume with a conventional arrangement of the drum bearings.
  • Bearings which are axially directly adjacent to one another are functionally regarded as a single bearing in the context of this application.
  • drum bearings are arranged according to the claims between the drum and the housing or a part firmly connected to the housing, as a radial connection allowing relative rotation between the elements "drum” and “frame” or “housing".
  • either one or both drum bearings and / or at least one or possibly both screw bearings are arranged within an axial area which lies between the solids discharge and the liquid drain of the drum.
  • the solid bowl screw centrifuge can be operated at an advantageously high speed, since the first resonance frequency of the drum, which generally limits the speed, is only set at a relatively high speed by the advantageous arrangement of the drum bearings according to the invention.
  • sections can be designed on the drum shaft sections, which are designed as shaft shoulders and are designed as a bearing seat, possibly. even be dispensed with. This may result in also a simplified manufacture of a drum hub and thus the drum.
  • An advantageous increase in performance of the solid-bowl screw centrifuge can then also be achieved in that the drum of the solid-bowl screw centrifuge with a predetermined arrangement of this type is axially extended with a defined spacing of the bearings and defined radius of the drum, so that a solid-bowl screw centrifuge with a larger one Volume results than would have been possible according to the prior art. g-numbers from 5000g - 7000g are easily accessible. The ratio of the length of the drum to the maximum inner diameter of the drum can be increased (also referred to as "A").
  • one of the drum bearings can be positioned radially on the outside of the drum or on the drum cover.
  • one of the drum bearings is positioned radially on the outside on the conical section of the drum. It can also be provided after further training or alternative training that one of the drum bearings is positioned radially outside on the cylindrical portion of the drum.
  • drum bearing positioned radially on the outside of the conical section of the drum has a smaller inner diameter than the cylindrical section of the drum, which reduces the bearing stress and the costs for the bearing and its maintenance or replacement ,
  • one of the drum bearings is positioned axially on the outside directly on the drum cover. All of these are before geous positions, in which each or in combination with each other, the inven tion of claims 1 and / or 2 can be advantageously implemented.
  • the drum bearings can be designed in different ways.
  • the drum bearings are designed as magnetic bearings. This advantageously creates a self-centering drum bearing, which is also particularly suitable for an arrangement on a relatively large radius on the conical or cylindrical part.
  • FIG. 4 is a side view of a fourth schematically shown full jacket
  • the rotor 200 has a rotatable drum 210 with a horizontal axis of rotation D.
  • the axis of rotation D can also be oriented differently, in particular vertically, in space.
  • the rotor 200 also includes a worm 230 arranged in the drum 210, the axis of rotation of which coincides with that of the drum 210.
  • the worm 230 can be rotated in operation at a differential speed to the drum 210.
  • the drum 210 has a cylindrical section 211 with a length Li and an axially adjoining conical section 212 with a length L 2 .
  • the cylindrical section 21 1 is closed off from a substantially radially extending drum cover 213.
  • the inside and outside of the drum (based on the drum jacket) is conical.
  • the worm 230 here also has a cylindrical section 231 and an axially adjoining conical section 232. It is arranged inside the drum 210.
  • An inlet pipe 214 which runs here concentrically to the axis of rotation, projects into the drum 210 and opens into a distributor 215 through which a suspension to be processed can be guided radially into a centrifugal space 216 of the drum 210.
  • the inlet pipe 214 can either be guided into the drum 210 from the side of the cylindrical drum section 211 or it can be guided into the drum 210 from the side of the conical drum section 212.
  • One or more liquid drains 217 can be formed in or on the drum cover 213. These can be designed in various ways, such as openings in the drum cover 213, which have a type of overflow weir, or in another way, such as a peeling disk. At least one solid discharge 218 is formed at the end of the conical section 212.
  • the drum 210 is designed as a solid jacket drum. At least one liquid phase F1 of solids Fe is then clarified in the rotating drum 210. The at least one liquid phase emerges from the liquid outlet 217 on the drum cover 213. The solids, on the other hand, are transported by the screw 230 in the direction of the solids discharge 218 and ejected from the drum 210 there.
  • FIG. 4 shows a solid bowl screw centrifuge in which a first drum shaft section 220 axially adjoins the drum cover 213 or the actual drum 210, which is connected to the drum 210 in a rotationally fixed manner and a second is connected axially to the conical drum section 212 Drum shaft section 219 closes, which is also rotatably connected to the drum 210.
  • the cylindrical section 231 of the worm 230 is axially adjoined by a first worm shaft section 234, which is non-rotatably connected to the worm 230, and the conical drum section 232 is axially adjoined by a second worm shaft section 233, which is also non-rotatably connected to the worm 230 ,
  • a drive device with one or two motors (not shown here) is used to drive the rotor 200.
  • the drive device 300 is followed by at least one transmission 310, on which here two pulleys 320, 330 are schematically shown, which indicates that the transmission 310 has at least two interfaces for feeding a respective torque of the motor or motors into the transmission 310 in order to To drive the drum and the screw.
  • the rotor can also be driven by fly hydraulic motors, so that no gear is required.
  • the drive can also be carried out by a combination of electric motor (s) and fly hydraulic motor (s), other gears being used for this purpose and the belt pulleys being omitted in whole or in part.
  • Gear 300 rotates drum 210 on the one hand and worm 230 on the other.
  • gear 300 has two output shafts.
  • the first output shaft is non-rotatably coupled to the first drum shaft section 220 or directly coupled to the drum 210 and the second output shaft is directly or indirectly non-rotatably coupled to the first worm shaft section 234 or directly to the worm 230.
  • the drum and the shaft are each rotatably supported by two drum bearings 221, 222 arranged axially in the direction of the axis of rotation.
  • the term "camp" is therefore not too narrow.
  • Each of the bearings 221, 222 can each consist of one or more individual bearings, which, however, are then arranged axially next to one another in such a way that they can each be functionally considered as a single bearing.
  • the bearings 221, 222 can also be designed as bearings of various designs, such as roller bearings - in particular as ceramic bearings, as hybrid ceramic bearings, as magnetic bearings or as plain bearings.
  • the drum bearings 221, 222 are arranged between the drum 210 and the frame 100 or a part connected to the frame so that the drum 210 can be rotated relative to the frame 100. This also applies to all variants described below and falling under the claims.
  • the drum bearings 221, 222 are preferably arranged radially between the drum 210 and the frame 100 or a part connected to the frame.
  • the screw bearings 235, 236, are arranged radially between the screw 230 and the drum 210, so that the screw 230 can be rotated relative to the drum 210.
  • the worm bearings 235, 236 are preferably arranged radially between the drum 210 and the worm 230.
  • one of the screw bearings 235 in the area of the solids discharge 218 can be omitted.
  • the rotating screw centers itself which e.g. with a vertical arrangement of the decanter is known.
  • the drum bearings 221, 222 are arranged axially outside the axial region L T of the drum 210, which lies between the solids discharge 218 and the liquid discharge 217 of the drum 210. They are in FIG. 4, for example, between the solids discharge 218 and an adjacent axial end of the housing 100 and the liquid outlet 217 and an adjacent axial end of the housing. Accordingly, a distance L L of the drum bearings 221, 222 is greater than a length L T the drum 210, which is added from the length Li of the cylindrical section 21 1 of the drum 210 and the length L 2 of the conical section 212 of the drum 210.
  • the ratio between the diameter of the drum on which the solids discharge is arranged and the maximum inside diameter of the drum can be between 0.4 and 0.3. This can advantageously help to keep the energy loss caused by the solids discharge low or to reduce it.
  • a relatively large value “A” can also be achieved (see the definition above).
  • the respective distance Ai and / or A 2 between the respective end of the drum 210 and the respective position of the drum bearing 221 and / or 222.
  • the respective distance Ai and / or A 2 by which the respective drum bearing 221, 222 is spaced from the liquid outlet 217 or the solids discharge 218 in the axial direction, so that it is positioned between the liquid outlet 217 and the solids discharge 218, is preferably 0 to 35% and particularly preferably 0 to 25% of the length of the drum 210 L T.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

La présente invention concerne une centrifugeuse à vis sans fin et à bol plein pourvue d'un boîtier (100) et d'un rotor (200) logé rotatif dans le boîtier (100). Ladite centrifuge comprend au moins ce qui suit : un tambour rotatif (210) autour d'un axe de rotation (D), le tambour (210) comprenant un secteur cylindrique (211) ayant une longueur L1 et un secteur conique (212) ayant la longueur L2, qui, additionnées forment la longueur LT du tambour (210) ; au moins une évacuation de liquide (217), qui est disposée dans le secteur cylindrique (211) du tambour (210) et au moins une décharge de matières solides (218), qui est disposée dans le secteur conique (212) du tambour ; une vis sans fin (230) rotative relativement au tambour rotatif (210) avec une vitesse de rotation différente et disposée dans le tambour, le tambour (210) et la vis sans fin (230) formant ensemble le rotor (200) ; au moins deux paliers de tambour (221, 222) pour loger le tambour (210) dans le boîtier (100), qui sont écartés l'un de l'autre d'une distance LL ; et au moins un palier de vis sans fin (236) pour loger la vis sans fin (230) dans le tambour (210). La présente invention est caractérisée en ce que la distance LL entre les paliers (221, 222) du tambour pour loger le tambour (210) est plus petite que la longueur LT du tambour (210).
EP19749629.2A 2018-08-08 2019-07-25 Centrifugeuse à vis sans fin et à bol plein Active EP3833486B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018119279.7A DE102018119279A1 (de) 2018-08-08 2018-08-08 Vollmantel-Schneckenzentrifuge
PCT/EP2019/070072 WO2020030438A1 (fr) 2018-08-08 2019-07-25 Centrifugeuse à vis sans fin et à bol plein

Publications (2)

Publication Number Publication Date
EP3833486A1 true EP3833486A1 (fr) 2021-06-16
EP3833486B1 EP3833486B1 (fr) 2024-07-03

Family

ID=67544183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19749629.2A Active EP3833486B1 (fr) 2018-08-08 2019-07-25 Centrifugeuse à vis sans fin et à bol plein

Country Status (6)

Country Link
US (1) US12023688B2 (fr)
EP (1) EP3833486B1 (fr)
JP (2) JP2021531959A (fr)
DE (1) DE102018119279A1 (fr)
DK (1) DK3833486T3 (fr)
WO (1) WO2020030438A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019126325A1 (de) 2019-09-30 2021-04-01 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge
DE102023116567A1 (de) * 2023-06-23 2024-12-24 Gea Westfalia Separator Group Gmbh Vollmantel-Schneckenzentrifuge
EP4667110A1 (fr) * 2024-06-17 2025-12-24 Alfa Laval Corporate AB Séparateur centrifuge

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539140A (en) 1940-09-27 1941-08-28 Alfred Reinhold Jahn Improvements in or relating to centrifugal separators
US3389881A (en) 1965-07-17 1968-06-25 Philips Corp Resilient supports for rotating machine parts
DE2257513A1 (de) * 1972-11-23 1974-05-30 Rudolf Friedrich Rohrzentrifuge
DD119628A1 (fr) 1975-02-25 1976-05-05
DD153614A1 (de) 1980-10-15 1982-01-20 Erich Barth Trommellagerung,insbesondere fuer trommelwaschmaschinen und zentrifugen
DE3142779C2 (de) * 1981-10-28 1986-03-20 Werner Prof. Dr. 6740 Landau Stahl Vollmantel-Schnecken-Zentrifuge
DE3219686A1 (de) * 1982-05-26 1983-12-15 Klöckner-Humboldt-Deutz AG, 5000 Köln Lagereinheit fuer die foerderschnecke einer zentrifuge
DK151186C (da) 1982-10-21 1988-04-25 Alfa Laval Separation As Dekantercentrifuge
EP0341433B1 (fr) * 1988-05-11 1993-08-04 Flottweg Gmbh Centrifugeuse à vis à bol plein
SE9802116D0 (sv) * 1998-06-15 1998-06-15 Alfa Laval Ab Dekantercentrifug
WO2007086114A1 (fr) * 2006-01-25 2007-08-02 Tomoe Engineering Co., Ltd. Centrifugeuse verticale
CN101511489B (zh) 2006-09-11 2012-09-05 Gea韦斯伐里亚分离机有限公司 带有一个具有水平旋转轴线的转子的离心机
DE102014108236A1 (de) * 2014-06-12 2015-12-17 Gea Mechanical Equipment Gmbh Vollmantel-Schneckenzentrifuge und Verfahren zu deren Betrieb
CN206286069U (zh) * 2016-12-23 2017-06-30 四川依瑞达环保科技有限公司 一种卧式螺旋沉降离心机

Also Published As

Publication number Publication date
JP2024054216A (ja) 2024-04-16
US12023688B2 (en) 2024-07-02
JP2021531959A (ja) 2021-11-25
DK3833486T3 (da) 2024-08-12
DE102018119279A1 (de) 2020-02-13
EP3833486B1 (fr) 2024-07-03
WO2020030438A1 (fr) 2020-02-13
JP7660236B2 (ja) 2025-04-10
US20210308696A1 (en) 2021-10-07

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