US3682373A - Centrifugal separator - Google Patents

Centrifugal separator Download PDF

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Publication number
US3682373A
US3682373A US882879A US3682373DA US3682373A US 3682373 A US3682373 A US 3682373A US 882879 A US882879 A US 882879A US 3682373D A US3682373D A US 3682373DA US 3682373 A US3682373 A US 3682373A
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United States
Prior art keywords
bowl
separator
housing
pivot
centrifugal separator
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Expired - Lifetime
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US882879A
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English (en)
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Andre Mercier
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Individual
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Individual
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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
    • 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
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor

Definitions

  • the present invention relates to improvements in centrifugal separators for separating a solid-liquid mixture in a separator bowl rotating about a vertical axis.
  • the bowl rotates at considerable speed, which often produces vibrations even if the weight of the machine parts is in proper equilibrium.
  • vibrations may be caused, for instance, by non-uniform distribution of the material on the filter screen mounted on the separator bowl, particularly if such material is highly viscous and/or if the screen becomes partly displaced in the bowl.
  • a centrifugal separator which comprises a housing including an upper portion, a fixedly supported lower portion, and an elastic support means resiliently supporting the upper housing portion of the separator on the lower separator housing portion.
  • a vertically extending pivot in the housing is supported by the upper separator housing portion.
  • a separating bowl having a hub is mounted for rotation on and about the pivot, the pivot extending into the interior of the bowl.
  • the upper separator housing portion and all elements carried thereby, including the pivot and the bowl, have a center of gravity, and the elastic support means is positioned approximately at the level of the center of gravity.
  • a screen is mounted over the interior surface of the bowl and spaced therefrom, the bowl and the screen being frusto-conical, and the elastic support means is positioned approximately at the level of the geometric center of gravity of the interior surface of the frustoconical bowl, in the embodiment of the invention described and illustrated herein.
  • the elastically suspended or supported part of the separator is subjected practically only to horizontal vibrations. If the elastic characteristics of the suspension means, such as rubber blocks or a rubber ring interposed between the upper and lower separator housing portions, are proper chosen, the machine may be insulated from vibrations, the vibrations of the elastic suspension means being opposite in phase to the forces of imbalance.
  • the upper portions of the upper housing portion may be somewhat heavier. This may be effected by increasing the thickness of the upper wall portion of the upper housing portion and/or by attaching an additional mass thereto.
  • a feed assembly which includes a feed pipe having an outlet end, the feed pipe being supported on the housing cover, a conical element fixed to the top of the bowl hub, the outlet end of the feed pipe being in registry with the conical element to deliver the material to this element, and a turbine wheel having radially extending blades fixed to the conical element.
  • the blades define spaces therebetween concentrically surrounding the conical element and receiving the material from the conical element, and an outwardly flaring tube is fixed to the turbine wheel and surrounds the hub.
  • An annular chamber is defined between the tube and hub for receiving the material from the spaces between the turbine wheel blades, the lower end of the tube defines with the bottom of the bowl a circular delivery opening means for delivering the material to the bowl, and the upper end of the tube surrounds the outlet end of the feed pipe.
  • a tight joint is provided between the upper tube end and the feed pipe outlet end to prevent the turbine wheel from acting like a ventilator and producing significant air circulation in the interior of the bowl.
  • FIG. 1 is a side view, largely in section, of a centrifugal separator according to this invention
  • FIG. 2 is a side view of a small portion of the separator showing a modified suspension means
  • FIG. 3 is an enlarged sectional view showing modified feed assembly for the separator.
  • a centrifugal separator comprising a frusto-conical or funnel-shaped bowl or basket 10 having an imperforate wall.
  • a similarly funnel-shaped screen or sieve 12 is mounted in the bowl l0 spaced from the bowl wall so that an annular space is defined between the bowl wall and the screen for receiving liquid filtered through the screen during operation of the separator. This liquid is upwardly displaced during rotation of the bowl towards discharge lip 10a of the bowl.
  • a frusto-conical skirt 14 having an imperforate wall is mounted on the discharge lip of the bowl so as to receive liquid passed outwardly through a series of apertures or an annular slot on the circumference of the discharge lip, the discharge liquid running downwardly on the skirt 14 into annular reservoir 16 constituted by sleeve 18 surrounding the bowl 10.
  • the upper rim of sleeve 18 extends close to the discharge lip of the separator bowl and a bottom wall 20 closes off the reservoir 16 whence liquid is discharged through pipe 31 passing outwardly through the walls of hopper 29.
  • the sleeve 18 is fixed by brackets or braces 19, to the fixed upper portion of the separator housing, and brackets or braces 21 to annular support 37.
  • the upper portion of the separator housing is constituted by a thick-walled top cylinder 22 and downwardly extending thin-walled skirt 24 overlapping the cylindrical lower portion 28 of the separator housing.
  • a base 33 extends radially outwardly from the lower portion of the separator housing to mount the lower separator housing portion rigidly on the foundation 29 which supports the separator.
  • the solid material separated from the liquid in the centrifugal separator is discharged through hopper 29 which extends downwardly from the separator housing and is flanged to the lower end of the lower separator housing portlon.
  • the upper separator housing portion is resiliently mounted on the lower separator housing portion in the following manner:
  • Support frameworks 27 are fixedly mounted on, or are integral with, the wall of the lower separator housing portion 28 and/or the base 33, and these supports 27 carry elastic or resilient blocks 26, for instance of rubber, which support the upper separator housing portion, brackets 23 extending radially outwardly from the thick-walled top cylinder 22 to rest on the resilient blocks 26. These blocks are positioned at the level of the center of gravity G of the suspended upper portion of the separator.
  • the interior of the separator housing is sealed from the atmosphere by means of suitable sealing means, such as an annular gasket 30 or a bellows sealing the joint between the upper and lower portions of the housing.
  • suitable sealing means such as an annular gasket 30 or a bellows sealing the joint between the upper and lower portions of the housing.
  • the bowl rotates about the vertical pivot 34 whose axial bore houses the drive shaft 44.
  • An annular rim 35 reinforced by radical ribs 39 extends from the lower or interior end of the pivot 34 into engagement with an annular support flange 36 which extends radially inwardly from sleeve 37.
  • the pivot extends from its lower end outside the bowl 10 into the bowl where it carries the hub 38 on anti-friction bearings 40 and 42, the bowl 10 being fixedly connected to the hub 38.
  • the hub 38 is bolted or otherwise fixed to the upper end of the drive shaft 44 whose lower end carries drive pulley 43 connected by belt 41 to pulley 45 of motor 46, which is mounted onv base 33 and drives shaft 44 and bowl 10.
  • a conical element 48 is fixed to the top of hub 38 in registry with the outlet of a feed conduit 50 mounted on the cover 32 of the separator housing.
  • the conical element 48 forms the hub of a turbine wheel 52 whose radially extending blades carry an outwardly flaring tube 54 whose upper rim surrounds the outlet opening or nozzle of pipe 50.
  • the tube extends towards the bottom of the separator bowl l0, defining with hub 38 an annular feed chamber 56, a circular discharge slot being formed between the lower rim of the tube 54 and the bottom of the separator bowl.
  • the resiliently suspended upper portion of the centrifugal separator consists of the cylindrical housing portion 22, 24, the cover 32, which is supported on the thickwalled cylinder 22, and the feed pipe means carried by the cover, the support elements for the pivot 34, which includes the sleeve 18, the brackets or braces 19, 21 mounting the sleeve on the housing wall 22, 24 and the sleeve 37, with the support flange 36, the drive shaft 44, the bowl 10 and its hub 38, and the screen 12.
  • the center of gravity G of the suspended mass of the separator is considerably higher than in conventional apparatus of this type.
  • the thickness of the upper wall portion 22 of the separator housing is so chosen or additional material is attached thereto so that the center of gravity of the entire suspended mass is about at the same level as the geometric center of gravity of the interior surface of the bowl. Since the forces of imbalance due to a nonuniform distribution of the charge in the bowl are generally situated at this level, no tilting moment is exerted upon the suspended portion of the separator and the vibratory movements are solely horizontal.
  • the axis of rotation of the bowl is displaced parallel to itself during such vibrations, so that no tilting movement would appear unless the pivot 34 were bent. Since the latter is rigid, however, any such tilt would at most be very slight.
  • FIG. 2 shows a modified suspension means in which the elastic suspension blocks are replaced by a rubber ring of suitable elasticity and damping characteristics.
  • the thick-walled cylinder wall 22 of the upper portion of the separator housing and the cylinder wall 28' of the lower separator housing portion have facing annular rims 22a and 28a, respectively, which define mating grooves receiving the rubber ring 60.
  • the suspension ring 60 simultaneously serves as a sealing means or gasket for the joint of the separator housing portions.
  • centrifugal separator hereinabove described and herein illustrated operates as follows:
  • a liquid-solid mixture is charged into bowl 10 through the feed pipe 50, passing outwardly between the blades of the turbine wheel 52 through the opening between the outlet end of the pipe 50 and the conical hub of the turbine wheel. Since the conical hub 48 is fixed on, or integral with, the hub 38 of the bowl 10, it turns at high speed with the bowl when the motor 46 is actuated to drive shaft 44.
  • the liquid-solid mixture charged into the separator through pipe 50 is thus entrained by friction and begins to rotate with the conical element 48. Under centrifugal force, the charge will leave the feed pipe in a horizontal layer and will be distributed at the speed of rotation of the bowl.
  • the turbine blades are helically inclined so as to direct the charged mixture downwardly into the tube 54 where it passes through chamber 56 and outwardly into the bowl through the circular slot defined between the lower rim of the tube 54 and the bottom of the bowl.
  • the conical element 48 and the turbine wheel blades divide the jet of material entering the separator into several layers, which is essential for a uniform distribution of the material in the tube 54 under centrifugal action in case the material is very viscous.
  • the material forms a continuous layer of uniform thickness on the wall of tube 54 under centrifugal force, and this layer of material is discharged at the bottom of the tube and is thrown against the screen 12 where it is upwardly displaced by the centrifugal force.
  • the liquid phase of the mixture is filtered through the screen and moves upwardly in the annular chamber between the screen and the imperforate wall of the bowl to be discharged through lip a into the reservoir 16.
  • the solid phase of the mixture is equally displaced upwardly on the screen 12, finally passing over the upper edge of the screen into the separator housing where it is discharged by gravity into hopper 29.
  • the specific feed system herein described permits a particularly uniform distribution of the charged material over the whole surface of the screen, thus reducing vibrations due to forces of imbalance.
  • the feed pipe 50' does not have an inwardly flaring outlet nozzle, as illustrated in FIG. 1, but the diameter of the feed pipe is greater than that of the material being fed so that the same freely falls onto the conical element 48.
  • the feed pipe 50 is mounted on the tube 54 by a joint constituted by a pair of horizontal flanges 62 and 64 respectively fixed to the pipe 50' and the tube 54.
  • the vertical position of the feedpipe is adjustable by wedge 66 positioned between the housing cover 32 and a flange 65 on the feed pipe to maintain a small gap between the flanges 62 and 64.
  • This gap and the thickness of the flanges are so chosen as to avoid too strong an air circulation in the interior of the bowl because of the suction produced by the turbine wheel 52 which operates like a ventilator.
  • This joint may be replaced by a labyrinth joint or any other suitable joint of conventional design serving the same purpose.
  • a centrifugal separator comprising 1. a housing, the housing including a. an upper portion,
  • the pivot being carried by the upper separator housing portion; and 3. a separating bowl having a hub mounted for rotation on and about said pivot and carried thereby;
  • the elastic support means being positioned approximately at the level of the center of gravity.
  • centrifugal separator of claim 1 further including a screen mounted over the interior surface of the bowl and spaced therefrom.
  • the centrifugal separator of claim 4 further comprising a joint between the upper end of the tube and the outlet end of the feed pipe.
  • the centrifugal separator of claim 1 wherein the upper housing portion comprises an upper and a lower wall portion, the thickness of the upper wall portion exceeding that of the lower wall portion.
  • the elastic support means comprises a ring of elastic material mounted between the upper and lower separator housing portions.
  • centrifugal separator of claim 1 further comprising a tight joint between the upper and lower separator housing portions.

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  • Centrifugal Separators (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US882879A 1968-12-09 1969-12-08 Centrifugal separator Expired - Lifetime US3682373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR177148 1968-12-09

Publications (1)

Publication Number Publication Date
US3682373A true US3682373A (en) 1972-08-08

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ID=8657984

Family Applications (1)

Application Number Title Priority Date Filing Date
US882879A Expired - Lifetime US3682373A (en) 1968-12-09 1969-12-08 Centrifugal separator

Country Status (9)

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US (1) US3682373A (pt)
BE (1) BE742328A (pt)
BR (1) BR6914858D0 (pt)
DE (2) DE1966575A1 (pt)
ES (1) ES374139A1 (pt)
FR (1) FR1595971A (pt)
GB (1) GB1257535A (pt)
PL (1) PL80382B1 (pt)
YU (1) YU32960B (pt)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858793A (en) * 1973-02-28 1975-01-07 Donaldson Co Inc Cartridge centrifuge
DE2526866A1 (de) * 1974-06-17 1976-02-12 Fives Cail Babcock Beschickungsvorrichtung fuer kontinuierlich arbeitende trennzentrifugen
US3938354A (en) * 1971-11-22 1976-02-17 Damon Corporation Apparatus for transmitting rotational energy from a motor to the rotor of a centrifuge
US4201066A (en) * 1978-03-29 1980-05-06 Damon Corporation Flexible shaft construction for a high inertia centrifuge
US4352451A (en) * 1980-09-25 1982-10-05 Fives-Cail Babcock Centrifugal drier
USRE32381E (en) * 1973-02-28 1987-03-24 Donaldson Company, Inc. Cartridge centrifuge
WO1992007659A1 (en) * 1990-10-31 1992-05-14 Nqea Australia Pty. Limited Feed distribution and control arrangement for centrifuge
CN102989596A (zh) * 2012-12-05 2013-03-27 江苏赛德力制药机械制造有限公司 滤袋振荡下卸料离心机
WO2015110360A1 (en) * 2014-01-22 2015-07-30 Mann+Hummel Gmbh Self-cleaning centrifugal separator
US20200316501A1 (en) * 2017-12-19 2020-10-08 Xeros Limited Filter for a treatment apparatus
WO2022090554A1 (de) * 2020-11-02 2022-05-05 Bruno Pregenzer Haltevorrichtung für einen abscheider und abscheider mit einer solchen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207663C3 (de) * 1972-02-18 1984-04-26 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge
DE2436044C3 (de) * 1974-07-26 1986-07-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Siebzentrifuge, insbesondere Zuckerzentrifuge
GB2133715A (en) * 1983-01-17 1984-08-01 Barry John Hartman A centrifugal separator
DE19719959C1 (de) * 1997-05-14 1998-08-27 Heraeus Instr Gmbh & Co Kg Zentrifuge mit verringerter Geräuschentwicklung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1242866A (en) * 1916-01-07 1917-10-09 Horace A Riggs Centrifugal self-balancing separator or clarifier.
US2019827A (en) * 1933-07-16 1935-11-05 Kobe Seiko Sho Ltd Spinning centrifugal motor arrangement
US2161476A (en) * 1938-01-26 1939-06-06 Smith Corp A O Ore concentrator
US2695133A (en) * 1953-08-26 1954-11-23 Herbert R Drury Centrifugal separator
US3050190A (en) * 1959-02-25 1962-08-21 Hein Lehman & Co Ag Centrifuges
US3081026A (en) * 1959-03-20 1963-03-12 Black Clawson Co Centrifuge
US3437209A (en) * 1967-02-01 1969-04-08 Mrs Ralph H L Becker Continuous centrifugal filter construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1242866A (en) * 1916-01-07 1917-10-09 Horace A Riggs Centrifugal self-balancing separator or clarifier.
US2019827A (en) * 1933-07-16 1935-11-05 Kobe Seiko Sho Ltd Spinning centrifugal motor arrangement
US2161476A (en) * 1938-01-26 1939-06-06 Smith Corp A O Ore concentrator
US2695133A (en) * 1953-08-26 1954-11-23 Herbert R Drury Centrifugal separator
US3050190A (en) * 1959-02-25 1962-08-21 Hein Lehman & Co Ag Centrifuges
US3081026A (en) * 1959-03-20 1963-03-12 Black Clawson Co Centrifuge
US3437209A (en) * 1967-02-01 1969-04-08 Mrs Ralph H L Becker Continuous centrifugal filter construction

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938354A (en) * 1971-11-22 1976-02-17 Damon Corporation Apparatus for transmitting rotational energy from a motor to the rotor of a centrifuge
US3858793A (en) * 1973-02-28 1975-01-07 Donaldson Co Inc Cartridge centrifuge
USRE32381E (en) * 1973-02-28 1987-03-24 Donaldson Company, Inc. Cartridge centrifuge
US3989185A (en) * 1974-06-17 1976-11-02 Fives-Cail Babcock Centrifugal machine
DE2526866A1 (de) * 1974-06-17 1976-02-12 Fives Cail Babcock Beschickungsvorrichtung fuer kontinuierlich arbeitende trennzentrifugen
US4201066A (en) * 1978-03-29 1980-05-06 Damon Corporation Flexible shaft construction for a high inertia centrifuge
US4352451A (en) * 1980-09-25 1982-10-05 Fives-Cail Babcock Centrifugal drier
WO1992007659A1 (en) * 1990-10-31 1992-05-14 Nqea Australia Pty. Limited Feed distribution and control arrangement for centrifuge
CN102989596A (zh) * 2012-12-05 2013-03-27 江苏赛德力制药机械制造有限公司 滤袋振荡下卸料离心机
CN102989596B (zh) * 2012-12-05 2015-04-08 江苏赛德力制药机械制造有限公司 滤袋振荡下卸料离心机
WO2015110360A1 (en) * 2014-01-22 2015-07-30 Mann+Hummel Gmbh Self-cleaning centrifugal separator
US10350614B2 (en) 2014-01-22 2019-07-16 Mann+Hummel Gmbh Self-cleaning centrifugal separator
US20200316501A1 (en) * 2017-12-19 2020-10-08 Xeros Limited Filter for a treatment apparatus
WO2022090554A1 (de) * 2020-11-02 2022-05-05 Bruno Pregenzer Haltevorrichtung für einen abscheider und abscheider mit einer solchen

Also Published As

Publication number Publication date
ES374139A1 (es) 1972-03-16
BR6914858D0 (pt) 1973-01-16
FR1595971A (pt) 1970-06-15
YU306469A (en) 1975-04-30
DE1961734B2 (de) 1973-10-18
DE1961734C3 (de) 1979-03-29
YU32960B (en) 1975-12-31
BE742328A (pt) 1970-05-04
DE1961734A1 (de) 1971-10-14
PL80382B1 (pt) 1975-08-30
DE1966575A1 (de) 1973-03-15
GB1257535A (pt) 1971-12-22

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