US3823868A - Sludge ejecting centrifuge - Google Patents

Sludge ejecting centrifuge Download PDF

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Publication number
US3823868A
US3823868A US00332330A US33233073A US3823868A US 3823868 A US3823868 A US 3823868A US 00332330 A US00332330 A US 00332330A US 33233073 A US33233073 A US 33233073A US 3823868 A US3823868 A US 3823868A
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Prior art keywords
rotor
piston
centrifuge
chamber
sludge
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Expired - Lifetime
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US00332330A
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English (en)
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M Baram
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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
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
    • B04B1/16—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl
    • B04B1/18—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl controlled by the centrifugal force of an auxiliary liquid

Definitions

  • a known configuration of this type includes an annular sealing piston which is movably situated between an inner vessel including the centrifugation chamber, and an outer vessel containing springs, fluid channels, fluid chambers and the connection with a drive shaft which all together represent one half, in most cases the'lower half, of a vertically rotating rotor, which furthermore includes an upper half, wherebetween are located a number of peripheral sludge ejection openings.
  • the purpose of the invention is to create a new centrifuge without the indicated drawbacks and with hitherto unknown advantages. 7
  • the invention comprises 'a centrifuge having only one vessel to form the centrifugation chamber and has no drilled channels or inner spaces to house the individual springs or the control fluid.
  • the annular spring and relatively thin sheet piston cause no special balancing problems and lopsided pressures cannot occur.
  • piston may be thin because it is stressed only lengthwise by spring and control fluid while the centrifugally induced cross stresses exclusively are determined by the ratio of specific weight to material strength in the piston.
  • the piston may be made of uncomplicated and cheaply passed sheet material.
  • the gasket is exchangeable being fastened to an exchangeable ring which, for constructional reasons is fastened to the upper rim of the piston after the piston with inserted spring has been placed around the lower partof the rotor and before the upper part of the rotor is installed.
  • the invention may also have the spring helically coiled or comprising a number of disc-shaped elements.
  • springs are easy to handle and cheap because they are obtainable from stock. These springs can be used very well if the centrifuge is meant to work at a specific speed because in that case it is possible to calculate the hydraulic pressure inside the. cen-' trifuge and the fluid chamber and to define the springs inrelation to vary speeds which will be attained by a spring having non-compressible elastic rings between stiff wedge shaped rings which will be deformed progressivelywith increased speed and force the stiff rings away from each other.
  • the sealing member may comprise a sleeve formed part which extends into the centrifugation spaceand is fastened there.
  • the piston is situated in a certain distan ce from the rotor vessel which distance may vary a little and thus it is necessary to make a sealing bridge, which must be elastical, across the gap between pistons upper rim and the rotor.
  • the piston preferably consists of plastic reinforced material such as epoxy compounds with glass fiber reinforcements which has great physical and chemical resistance in relation to its specific weight which, among other advantages, reduces balancing problems and the need to treat the surface of this part.
  • the spring chamber is preferably provided with at least one relief nozzle the importance'of which is that the gap between the lower shoulder of the rotor vessel and the inner surface of the piston at 'thatpoint near the controlfluid chamber does not need to-be specially water tight as long as the leakage has a lower through flow capacity than the relief nozzle.
  • FIG. 2 shows a detail of the same with a special bridge sealing gasket, I
  • FIGS. 3 and 4 show another detail with a new spring type.
  • FIG. 5 shows another detail with a disc type annular spring, such as the type manufactured by .Schnorr of West Germany.
  • the centrifuge'rotor consists of an upper l and a lower 2 half with therebetween situated peripheral sludge ejection slit 3, all mounted on an axle 4 which, not shown, continues upwardly beyond the upper half 1 to facilitate the fixation and tightening of halves l and 2 in relation toeach other.
  • a thin annular piston 5 furnished with an upper flange 6 and a lower chamber plate 7. Parts 5, 6 and 7 may be made in one piece.
  • a spring chamber 8 Between the piston 5 and rotor part 2 is a spring chamber 8 and in it ananspring.
  • Between chamber plate 7 and the bottom of part 2 is an annular fluid chamber-l0 which receives a control fluid from a stationary pipe 11.
  • Fluid chamber 10 may be furnished with a number of relief nozzles 12.
  • Spring chamber 8 may also be furnished with a number of relief nozzles l3 to eject whatever control fluid that may have entered chamber 8 from chamber 10.
  • the flange 6 carries a separate reinforced ring 14 with attached rubber sealing gasket 15,
  • the helical or disc spring keeps the centrifuge closed with a. predetermined pressure force independently of the rotational speed of the centrifuge-Fluid chamber 10 is dimensioned in such a way that the fluid injected into chamher generates a greater force than the spring force at a certain speed which opens the ejection slit 3.
  • the gasket has a sleeve 16 which forms an elastic bridge over the gap between the ring 14 and rotor part 2 and which is fastened inside the centrifugating space in a known manner.
  • FIGS. 3 and 4 show an entirely new spring which consists of wedge shaped stiff rings 17 and interposed rings 18 of non-compressible elastic material.
  • the elastic rings 18 ar slightly pressed between rings 17 which means that the centrifuge is slightly sealed when it stands still and at low speed.
  • the centrifuge is closed stronger as the elastic rings 18'force themselves more and more between rings 17 The higher the speed the stronger the sealing of the centrifuge.
  • Rings 17 are forced progressively away from each other, as shown in FIG. 4.
  • Fluid chamber 10 is dimensioned so that injected fluid generates a hydrostatic pressure which forces the elastic rings 18 along the wedge shaped surfaces of rings 17 back into their former position so that the centrifuge is opened. It is also possible to combine these special rings with an ordinary helical or disc spring arrangement.
  • a sludge centrifuge for the separation of fluids from sludge comprising a rotor having an upper half and a lower half, said rotor including at least one slit therein for ejecting sludge therethrough, said centrifuge further comprising an annular piston mounted coaxially with said rotor and surrounding at least a portion thereof, said piston having an upper flange reinforcement and forming an annular chamber between said piston and said rotor, at least one annular movable springmeans positioned in said chamber in surrounding relationship with said rotor lower half, and spring means having an upper end pressing against the underside of said flange, said rotor further having a shoulder portion, said spring means further having a lower end pressing against said rotor shoulder portion, said piston having a lower end, said piston lower end including a chamber plate extending outside of and parallel with the bottom of said rotor lower half and forming together therewith a chamber for a control fluid, said control fluid chamber having at least one relief nozzle therein for said control fluid
  • a sludge centrifuge for the separation of fluids from sludge comprising a rotor having an upper half and a lower half, said rotor including at least one slit 1 therein for ejecting sludge therethrough, said centrifuge further comprising an annular piston mounted coaxially with said rotor and surrounding at least a portion thereof, said piston having an upper flange reinforcement and forming an annular chamber between said piston and said rotor, at least one annular movable spring means positioned in said chamber in surrounding relationship with said rotor lower half, said spring means having an upper end pressing against the underside of said flange, said rotor further having a shoulder portion, said spring means further having a lower end pressing against said rotor shoulder portion and comprising a number of wedge formed stiff rings placed on top of each other and of a suitable number of noncompressible elastic rings spaced between them, said piston having a lower end, said piston lower end including a chamber plate extending outside of and parallel with the bottom of said rotor
  • a centrifuge as in claim 1 further comprising a sealing member secured to said upper flange reinforcement, said sealing member having a sleeve formed part which extends into a centrifugation space and is fastened thereto.
  • a centrifuge in accordance with claim 8 wherein said sealing member is held in a position for closing said slit by said annular spring and is changed to a position for opening said slit by centrifugally generated hydrostatic pressure of said control fluid injected into said fluid chamber.

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  • Centrifugal Separators (AREA)
  • Springs (AREA)
US00332330A 1972-03-01 1973-02-14 Sludge ejecting centrifuge Expired - Lifetime US3823868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK93572AA DK127041B (da) 1972-03-01 1972-03-01 Slamcentrifuge.

Publications (1)

Publication Number Publication Date
US3823868A true US3823868A (en) 1974-07-16

Family

ID=8099179

Family Applications (1)

Application Number Title Priority Date Filing Date
US00332330A Expired - Lifetime US3823868A (en) 1972-03-01 1973-02-14 Sludge ejecting centrifuge

Country Status (7)

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US (1) US3823868A (it)
JP (1) JPS541050B2 (it)
DE (1) DE2309951A1 (it)
DK (1) DK127041B (it)
GB (1) GB1378122A (it)
IT (1) IT982864B (it)
SE (1) SE378194B (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852628A1 (de) * 1978-12-06 1980-06-19 Kloeckner Humboldt Deutz Ag Separator
US4211361A (en) * 1977-10-14 1980-07-08 Martin Baram Annular seal for self-cleaning sludge centrifuges
DE3009669A1 (de) * 1980-03-13 1981-09-24 Klöckner-Humboldt-Deutz AG, 5000 Köln Selbstentleerende vollmantel-zentrifuge
US4347971A (en) * 1977-03-03 1982-09-07 Joy Manufacturing Company Centrifuge apparatus
US4392846A (en) * 1981-05-18 1983-07-12 Joy Manufacturing Company Centrifuge apparatus
US4432748A (en) * 1976-09-03 1984-02-21 Joy Manufacturing Company Centrifuge apparatus and method of operating a centrifuge
US20040023783A1 (en) * 2001-01-19 2004-02-05 Willi Niemerg Centrifuge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155476A (en) * 1976-06-18 1977-12-23 Kogyo Kaihatsu Kenkyusho Kk Centrifugal saparator
DE3308505C1 (de) * 1983-03-10 1984-11-15 Westfalia Separator Ag, 4740 Oelde Selbstentleerende Schleudertrommel
DE10143411B4 (de) * 2001-09-05 2004-02-19 Westfalia Separator Ag Zentrifuge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR887232A (fr) * 1941-11-10 1943-11-08 Perfectionnements aux épurateurs centrifuges
US3079069A (en) * 1958-05-16 1963-02-26 Separator Ab Self-opening sludge centrifuge
US3593915A (en) * 1968-09-25 1971-07-20 Westphalia Separator Ag Controlled desludging of centrifugal separators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594461C (de) * 1928-06-04 1934-03-17 Aage Nyrop Schlammschleudermaschine, bei welcher die Schleudertrommel aus zwei Trommelteilen besteht und mit einem Abschlussschieber fuer den Schlammspalt versehen ist
DE625067C (de) * 1934-10-14 1936-02-03 Friedrich Kinscher Schleudertrommel mit einer ausserhalb des Scheideraumes angeordneten Schlammsammelkammer
DE878479C (de) * 1947-09-26 1953-04-16 Int Harvester Co Trennschleuder, insbesondere Milchzentrifuge
US2674254A (en) * 1947-09-26 1954-04-06 Vernay Laboratories Centrifugally operable valve ring for power washing cream separators

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR887232A (fr) * 1941-11-10 1943-11-08 Perfectionnements aux épurateurs centrifuges
US3079069A (en) * 1958-05-16 1963-02-26 Separator Ab Self-opening sludge centrifuge
US3593915A (en) * 1968-09-25 1971-07-20 Westphalia Separator Ag Controlled desludging of centrifugal separators

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432748A (en) * 1976-09-03 1984-02-21 Joy Manufacturing Company Centrifuge apparatus and method of operating a centrifuge
US4347971A (en) * 1977-03-03 1982-09-07 Joy Manufacturing Company Centrifuge apparatus
US4211361A (en) * 1977-10-14 1980-07-08 Martin Baram Annular seal for self-cleaning sludge centrifuges
DE2852628A1 (de) * 1978-12-06 1980-06-19 Kloeckner Humboldt Deutz Ag Separator
US4288029A (en) * 1978-12-06 1981-09-08 Klockner-Humboldt-Deutz Ag Separator with pressure-responsive discharge
DE3009669A1 (de) * 1980-03-13 1981-09-24 Klöckner-Humboldt-Deutz AG, 5000 Köln Selbstentleerende vollmantel-zentrifuge
US4392846A (en) * 1981-05-18 1983-07-12 Joy Manufacturing Company Centrifuge apparatus
US20040023783A1 (en) * 2001-01-19 2004-02-05 Willi Niemerg Centrifuge
US6827680B2 (en) * 2001-01-19 2004-12-07 Westfalia Separator Ag Centrifuge

Also Published As

Publication number Publication date
DK127041B (da) 1973-09-17
IT982864B (it) 1974-10-21
JPS541050B2 (it) 1979-01-19
GB1378122A (en) 1974-12-18
JPS4899762A (it) 1973-12-17
DE2309951A1 (de) 1973-09-06
SE378194B (it) 1975-08-25

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