US3335946A - Separating disks for centrifuges - Google Patents

Separating disks for centrifuges Download PDF

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Publication number
US3335946A
US3335946A US447209A US44720965A US3335946A US 3335946 A US3335946 A US 3335946A US 447209 A US447209 A US 447209A US 44720965 A US44720965 A US 44720965A US 3335946 A US3335946 A US 3335946A
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Prior art keywords
disks
separating
separating disks
centrifuges
specific gravity
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Expired - Lifetime
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US447209A
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English (en)
Inventor
Putterlik Jan
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Czech Academy of Sciences CAS
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Czech Academy of Sciences CAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/14—Inserts, e.g. armouring plates for separating walls of conical shape

Definitions

  • This invention relates generally to the separating disks of centrifuges used in separating the liquid and solid constituents of a slurry or dispersion so as to obtain a concentrated slurry or dispersion, that is, the solids with a much reduced proportion of the liquid, or a clarified liquid.
  • Centrifuges of the type described above generally include a hollow bowl rotated about its axis and containing an axial series of spaced, frusto-conically shaped separating disks of somewhat smaller diameter than the bowl shell.
  • the slurry, dispersion or other incoming material to be centrifuged is admitted through feed channels which discharge near the outer edges of the separating disks, and the clarified liquid is removed from the bowl through an outlet positioned at or near the axis of rotation.
  • the liquid constituent is made to flow centripetally, or radially inward, through the spaces between the separating disks in order to reach the outlet for the liquid and, during such flow, the solid particles are driven centrifugally so as to collect in the radially outward portion of the bowl shell beyond the perimeters of the separating disks.
  • Discharge nozzles are further provided, in certain existing centrifuges, for discharging the concentrated solids which collect in the outer peripheral portion of the bowl shell.
  • the separating disks are formed of thin sheet metal which is either stainless steel or treated so as to resist corrosion.
  • Such existing sheet metal separating disks are further provided with spacing projections in the form of metal stampings which are welded to the conical surfaces of the disks at radially spaced intervals. It will be apparent that the manufacture of such sheet metal separating disks is difiicult and costly, as the disks must be accurately shaped and have smooth surfaces in order to ensure the high operating efliciency, and relatively low power consumption of the centrifuge.
  • the existing separating disks of sheet metal have two further substantial disadvantages.
  • the sheet metal pre viously used for the separating disks has a high modulus of elasticity in tension, for example, up to 20,000 kg./mm. in the case of steel, and, by reason of such high modulus of elasticity, the separating disks formed of sheet metal respond readily to vibration of the bowl or rotor of the centrifuge, which vibration may result from the dynamic unbalance of the separating disks.
  • the vibrations of the separating discs interfere with the centrifugal separation of the dispersion or slurry in the thin layers or flows passing between the separating disks.
  • the sheet metal for forming the separating disks usually has a specific gravity of approximately 8.0 which may be almost eight times larger than the specific gravity of the dispersion flowing between the separating disks so that any inaccuracy in the shape and balance of the separating disks with respect to the axis of rotation constitutes a source of dynamic unbalance giving rise to vibration of the rotated bowl or rotor.
  • Such dynamic unbalance cannot be easily eliminated by balancing of the several separating disks, as it is difiicult to ensure the same relatively large number of disks will be assembled in the same order or sequence whenever the bowl or rotor is opened and has the disks removed therefrom.
  • separating disks for centrifuges are formed of a material having a modulus of elasticity which is no greater than 1,000 kg./mm. and a specific gravity no greater than approximately 2.0, that is, not exceeding approximately two times that specific gravity of the dispersion which is to be centrifuged.
  • FIG: 1 is an elevational view of a separating disk for a centrifuge in accordance with this invention.
  • FIG. 2 is a sectional view taken along the lines 22 on FIG. 1.
  • a separating disk 10 embodying this invention may be generally fr-usto-conical in shape and have radially directed rims 11 and 12 extending along its inner and outer peripheries. At least one of the conical surfaces of the disk 10 has suitably spaced projections 13 extending therefrom for the purpose of uniformly spacing apart adjacent separating disks when the latter are assembled in the bowl or rotor of a centrifuge.
  • the separating disk 10 is formed of a material having a modulus of elasticity not greater than approximately 1,000 kg./mm. and a specific gravity not greater than approximately 2.0.
  • synthetic resin materials satisfy the foregoing requirements for forming separating disks in accordance with this invention, such as, for example, polyethylene, polyvinyl chloride, polypropylene, textile and glass laminates, resins and the like. Separating disks for centrifuges formed of such synthetic materials in accordance with this invention can be conveniently molded, for example, by injecting molding, so that the spacing projections 13 can be simultaneously formed with the remainder of each separating disk and form integral parts of the latter.
  • separating disks When separating disks are formed of a material with a relatively low modulus of elasticity, as in accordance with this invention, such disks serve to damp the vibrations of the rotated rotor or bowl and thus do not vibrate or respond to vibration of the rotor or bowl arising from any dynamic unbalance of the latter.
  • the separating disks embodying this invention secure the smooth and elfective centrifugal separation of the solids from the liquid constituents in the layers of flows passing between the adjacent separating disks.
  • the disks embodying this invention do not cause any appreciable or significant dynamic unbalance of the rotor or bowl. Even if there are inaccuracies in the shapes of the separating disks embodying this invention or in their concentricity with respect to the axis of rotation, such inaccuracies are substantially compensated by the filling of the spaces between adjacent separating disks with the dispersion flowing therethrough and having a specific gravity which is, at the worst, only one-half of the specific gravity of the material forming the disks.
  • separating disks embodying this invention can 3 be conveniently molded by injection molding or other conventional molding procedures, the same can be very economically produced, particularly when one considers that the spacing projections are simultaneously formed thereon, rather than being separately attached, as in the case of the previously existing sheet metal separating disks, It will also be apparent that injection molded separating disks embodying this invention can be formed with a perfectly accurate shape and with smooth surfaces so as to promote the effective centrifugal separation of the liquid and solid constituents of a dispersion.
  • the materials proposed for forming of the separating disks in accordance with this invention have a strength which is relatively low when compared with that of the sheet metal previously used for separating disks, such relatively low strength is not disadvantageous by reason of low specific gravity of the proposed materials which makes it possible for the stress resulting from the centrifugal force to be compensated, at least to a considerable extent, by the centripetal, or radially inwardly directed force or hydrostatic lift acting on the separating disks as a result of the radially inwardly directed flow between adjacent disks.
  • the separating disks formed from the proposed synthetic materials in accordance with this invention have a further advantage in the resistance to abrasion of such materials by the dispersion flowing between the separating disks.
  • a separating disk for a centrifuge said disk being of a material having a specific gravity of less than approximately 2.() and a modulus of elasticity in tension of less than approximately 1000 kg./mm.
  • a molded separating disk for a centrifuge said disk being of generally frusto-conical configuration and having integral spacing projections extending from at least one surface thereof, said disk being of a synthetic material having a specific gravity of less than approximately 2.0 and a modulus of elasticity in tension of less than approximately 1000 kg./mm.

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  • Centrifugal Separators (AREA)
US447209A 1964-04-14 1965-04-12 Separating disks for centrifuges Expired - Lifetime US3335946A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS215564 1964-04-14

Publications (1)

Publication Number Publication Date
US3335946A true US3335946A (en) 1967-08-15

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US447209A Expired - Lifetime US3335946A (en) 1964-04-14 1965-04-12 Separating disks for centrifuges

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US (1) US3335946A (zh)
GB (1) GB1098007A (zh)
SE (1) SE316422B (zh)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036429A (en) * 1975-03-18 1977-07-19 Ivin Jury F Bowl of centrifugal separator
WO1990004460A1 (en) * 1988-10-17 1990-05-03 Alfa-Laval Separation Ab Centrifugal separator
US5045049A (en) * 1988-10-17 1991-09-03 Alfa-Laval Separation Ab Centrifugal separator
WO1996027445A1 (en) * 1995-03-06 1996-09-12 Tetra Laval Holdings & Finance S.A. Stack of separation discs for centrifugal separator
US6210311B1 (en) * 1998-09-25 2001-04-03 Analytical Engineering, Inc. Turbine driven centrifugal filter
US6261455B1 (en) 1998-10-21 2001-07-17 Baldwin Filters, Inc. Centrifuge cartridge for removing soot from oil in vehicle engine applications
US6428700B1 (en) 2000-09-06 2002-08-06 Baldwin Filters, Inc. Disposable centrifuge cartridge backed up by reusable cartridge casing in a centrifugal filter for removing soot from engine oil
WO2002097422A1 (en) * 2001-05-31 2002-12-05 Electron-Bio, Inc. A micro valve apparatus using micro bead and method for controlling the same
US6517475B1 (en) 1998-09-25 2003-02-11 Baldwin Filters, Inc. Centrifugal filter for removing soot from engine oil
US6520902B1 (en) 1998-10-21 2003-02-18 Baldwin Filters, Inc. Centrifuge cartridge for removing soot from engine oil
US6579218B1 (en) 1998-09-25 2003-06-17 Analytical Engineering, Inc. Centrifugal filter utilizing a partial vacuum condition to effect reduced air drag on the centrifuge rotor
US20060100083A1 (en) * 2002-09-02 2006-05-11 Torgny Lagerstedt Disc stacking arrangement
US20060135339A1 (en) * 2002-06-19 2006-06-22 Martin Sandgren Rotation body arrangement
WO2007114766A1 (en) * 2006-04-04 2007-10-11 Alfa Laval Corporate Ab Rotor unit for a centrifugal separator
US20110136649A1 (en) * 2008-04-08 2011-06-09 Alfa Laval Corporate Ab Separation disc and separator
US20110195832A1 (en) * 2008-09-30 2011-08-11 Alfa Laval Corporate Ab Separation disk for a centrifuge rotor, and a disk package
US20110237417A1 (en) * 2008-09-30 2011-09-29 Alfa Laval Corporate Ab Disk package for a centrifuge rotor
EP2400039A2 (en) 2005-04-30 2011-12-28 Jae-Chern Yoo Bio-Disc, Bio-Driver Apparatus, And Assay Method Using the Same
DE102013101654A1 (de) 2013-02-20 2014-08-21 Gea Mechanical Equipment Gmbh Trenntellerpaket
US20150126353A1 (en) * 2012-05-14 2015-05-07 Alfa Laval Corporate Ab Disc package for a centrifugal separator
EP2326428B1 (en) 2008-07-16 2016-11-16 Alfa Laval Corporate AB Centrifugal separator
US9861920B1 (en) 2015-05-01 2018-01-09 Imagine Tf, Llc Three dimensional nanometer filters and methods of use
US20180141057A1 (en) * 2015-04-24 2018-05-24 Alfa Laval Corporate Ab Centrifugal separator with disc stack
US10040018B2 (en) 2013-01-09 2018-08-07 Imagine Tf, Llc Fluid filters and methods of use
US10118184B2 (en) * 2012-04-23 2018-11-06 3Nine Ab Centrifugal separator conical rotor disc elements having radial projections, and rotors having disc elements
US10118842B2 (en) 2015-07-09 2018-11-06 Imagine Tf, Llc Deionizing fluid filter devices and methods of use
US10124275B2 (en) 2014-09-05 2018-11-13 Imagine Tf, Llc Microstructure separation filters
US10307758B2 (en) 2012-12-05 2019-06-04 Research & Business Foundation Sungkyunkwan University Thin film valve apparatus using a fluid hole closing membrane
CN109890510A (zh) * 2016-10-31 2019-06-14 阿法拉伐股份有限公司 分离盘的堆叠
US20190247865A1 (en) * 2016-10-31 2019-08-15 Alfa Laval Corporate Ab Separation disc for a centrifugal separator
US10479046B2 (en) 2015-08-19 2019-11-19 Imagine Tf, Llc Absorbent microstructure arrays and methods of use
US10730047B2 (en) 2014-06-24 2020-08-04 Imagine Tf, Llc Micro-channel fluid filters and methods of use
US10758849B2 (en) 2015-02-18 2020-09-01 Imagine Tf, Llc Three dimensional filter devices and apparatuses
US20210046490A1 (en) * 2018-03-12 2021-02-18 Hengst Se Rotor for a centrifugal separator and centrifugal separator
US10960411B2 (en) 2011-08-10 2021-03-30 Alfa Laval Corporate Ab Separation disc for a centrifugal separator and a method for manufacturing the separation disc
US11123753B2 (en) * 2016-10-31 2021-09-21 Alfa Laval Corporate Ab Centrifugal separator with disc having regions of different densities of spacing members
CN115324685A (zh) * 2022-10-14 2022-11-11 苏州恩都法汽车系统有限公司 一种离心式分离器和发动机系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US989099A (en) * 1908-06-23 1911-04-11 Laval Separator Co De Centrifugal liquid-separator.
US1168452A (en) * 1914-09-28 1916-01-18 Champion Blower & Forge Co Centrifugal cream-separator.
US3235174A (en) * 1961-01-24 1966-02-15 Aero Flow Dynamics Inc Centrifugal liquid purifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US989099A (en) * 1908-06-23 1911-04-11 Laval Separator Co De Centrifugal liquid-separator.
US1168452A (en) * 1914-09-28 1916-01-18 Champion Blower & Forge Co Centrifugal cream-separator.
US3235174A (en) * 1961-01-24 1966-02-15 Aero Flow Dynamics Inc Centrifugal liquid purifier

Cited By (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036429A (en) * 1975-03-18 1977-07-19 Ivin Jury F Bowl of centrifugal separator
WO1990004460A1 (en) * 1988-10-17 1990-05-03 Alfa-Laval Separation Ab Centrifugal separator
US5045049A (en) * 1988-10-17 1991-09-03 Alfa-Laval Separation Ab Centrifugal separator
US5052996A (en) * 1988-10-17 1991-10-01 Alfa-Laval Separation Ab Centrifugal separator
WO1996027445A1 (en) * 1995-03-06 1996-09-12 Tetra Laval Holdings & Finance S.A. Stack of separation discs for centrifugal separator
US6517475B1 (en) 1998-09-25 2003-02-11 Baldwin Filters, Inc. Centrifugal filter for removing soot from engine oil
US6210311B1 (en) * 1998-09-25 2001-04-03 Analytical Engineering, Inc. Turbine driven centrifugal filter
US6579218B1 (en) 1998-09-25 2003-06-17 Analytical Engineering, Inc. Centrifugal filter utilizing a partial vacuum condition to effect reduced air drag on the centrifuge rotor
US6261455B1 (en) 1998-10-21 2001-07-17 Baldwin Filters, Inc. Centrifuge cartridge for removing soot from oil in vehicle engine applications
US6296765B1 (en) 1998-10-21 2001-10-02 Baldwin Filters, Inc. Centrifuge housing for receiving centrifuge cartridge and method for removing soot from engine oil
US6520902B1 (en) 1998-10-21 2003-02-18 Baldwin Filters, Inc. Centrifuge cartridge for removing soot from engine oil
US6428700B1 (en) 2000-09-06 2002-08-06 Baldwin Filters, Inc. Disposable centrifuge cartridge backed up by reusable cartridge casing in a centrifugal filter for removing soot from engine oil
US7635585B2 (en) 2001-05-31 2009-12-22 Jae Chern Yoo Micro valve apparatus using micro bead and method for controlling the same
US20040155213A1 (en) * 2001-05-31 2004-08-12 Yoo Jae Chern Micro valve apparatus using micro bead and method for controlling the same
WO2002097422A1 (en) * 2001-05-31 2002-12-05 Electron-Bio, Inc. A micro valve apparatus using micro bead and method for controlling the same
US20100055771A1 (en) * 2001-05-31 2010-03-04 Jae Chern Yoo Micro valve apparatus using micro bead and method for controlling the same
US8241891B2 (en) 2001-05-31 2012-08-14 Samsung Electronics Co., Ltd. Micro valve apparatus using micro bead and method for controlling the same
US20060135339A1 (en) * 2002-06-19 2006-06-22 Martin Sandgren Rotation body arrangement
US20060100083A1 (en) * 2002-09-02 2006-05-11 Torgny Lagerstedt Disc stacking arrangement
EP2400039A2 (en) 2005-04-30 2011-12-28 Jae-Chern Yoo Bio-Disc, Bio-Driver Apparatus, And Assay Method Using the Same
WO2007114766A1 (en) * 2006-04-04 2007-10-11 Alfa Laval Corporate Ab Rotor unit for a centrifugal separator
US20090137378A1 (en) * 2006-04-04 2009-05-28 Alfa Laval Corporate Ab Rotor unit for a centrifugal separator
US9550192B2 (en) 2006-04-04 2017-01-24 Alfa Laval Corporate Ab Rotor unit for a centrifugal separator having undetachably joined separating discs
US8308626B2 (en) * 2006-04-04 2012-11-13 Alfa Laval Corporate Ab Rotor unit for a centrifugal separator having undetachably joined separating discs
US20110136649A1 (en) * 2008-04-08 2011-06-09 Alfa Laval Corporate Ab Separation disc and separator
US8454487B2 (en) * 2008-04-08 2013-06-04 Alfa Laval Corporate Ab Separation disc and separator
EP2326428B2 (en) † 2008-07-16 2023-03-01 Alfa Laval Corporate AB Centrifugal separator
EP2326428B1 (en) 2008-07-16 2016-11-16 Alfa Laval Corporate AB Centrifugal separator
US8678989B2 (en) * 2008-09-30 2014-03-25 Alfa Laval Corporate Ab Centrifugal separator separating disc interspace configurations
US20110237417A1 (en) * 2008-09-30 2011-09-29 Alfa Laval Corporate Ab Disk package for a centrifuge rotor
US20110195832A1 (en) * 2008-09-30 2011-08-11 Alfa Laval Corporate Ab Separation disk for a centrifuge rotor, and a disk package
US8562503B2 (en) * 2008-09-30 2013-10-22 Alfa Laval Corporate Ab Disk package for a centrifuge rotor
US10960411B2 (en) 2011-08-10 2021-03-30 Alfa Laval Corporate Ab Separation disc for a centrifugal separator and a method for manufacturing the separation disc
US10118184B2 (en) * 2012-04-23 2018-11-06 3Nine Ab Centrifugal separator conical rotor disc elements having radial projections, and rotors having disc elements
US20150126353A1 (en) * 2012-05-14 2015-05-07 Alfa Laval Corporate Ab Disc package for a centrifugal separator
US9849467B2 (en) * 2012-05-14 2017-12-26 Alfa Laval Corporate Ab Disc package for a centrifugal separator
US10682646B2 (en) 2012-12-05 2020-06-16 Research & Business Foundation Sungkyunkwan University Thin film valve apparatus using a fluid hole closing membrane
US10307758B2 (en) 2012-12-05 2019-06-04 Research & Business Foundation Sungkyunkwan University Thin film valve apparatus using a fluid hole closing membrane
US10710018B2 (en) 2013-01-09 2020-07-14 Imagine Tf, Llc Fluid filters and methods of use
US10040018B2 (en) 2013-01-09 2018-08-07 Imagine Tf, Llc Fluid filters and methods of use
CN105188946A (zh) * 2013-02-20 2015-12-23 Gea机械设备有限公司 分离盘组
WO2014128063A2 (de) 2013-02-20 2014-08-28 Gea Mechanical Equipment Gmbh Trenntellerpaket
US20160001302A1 (en) * 2013-02-20 2016-01-07 Gea Mechanical Equipment Gmbh Separator Disk Package
US9687858B2 (en) * 2013-02-20 2017-06-27 Gea Mechanical Equipment Gmbh Separator disk package with separator disks having labyrinth-like flow channel
CN105188946B (zh) * 2013-02-20 2017-11-17 Gea机械设备有限公司 分离盘组
DE102013101654A1 (de) 2013-02-20 2014-08-21 Gea Mechanical Equipment Gmbh Trenntellerpaket
US10589204B2 (en) 2014-05-01 2020-03-17 Imagine Tf, Llc Three dimensional nanometer filters and methods of use
US10730047B2 (en) 2014-06-24 2020-08-04 Imagine Tf, Llc Micro-channel fluid filters and methods of use
US10124275B2 (en) 2014-09-05 2018-11-13 Imagine Tf, Llc Microstructure separation filters
US10758849B2 (en) 2015-02-18 2020-09-01 Imagine Tf, Llc Three dimensional filter devices and apparatuses
US20180141057A1 (en) * 2015-04-24 2018-05-24 Alfa Laval Corporate Ab Centrifugal separator with disc stack
US10940489B2 (en) * 2015-04-24 2021-03-09 Alfa Laval Corporate Ab Centrifugal separator with disc stack having discs of different diameters
US9861920B1 (en) 2015-05-01 2018-01-09 Imagine Tf, Llc Three dimensional nanometer filters and methods of use
US10118842B2 (en) 2015-07-09 2018-11-06 Imagine Tf, Llc Deionizing fluid filter devices and methods of use
US10479046B2 (en) 2015-08-19 2019-11-19 Imagine Tf, Llc Absorbent microstructure arrays and methods of use
US20190247865A1 (en) * 2016-10-31 2019-08-15 Alfa Laval Corporate Ab Separation disc for a centrifugal separator
US10960412B2 (en) * 2016-10-31 2021-03-30 Alfa Laval Corporate Ab Separation disc for a centrifugal separator having spot-formed spacing members
US20190247866A1 (en) * 2016-10-31 2019-08-15 Alfa Laval Corporate Ab Stack of separation discs
US11027291B2 (en) * 2016-10-31 2021-06-08 Alfa Laval Corporate Ab Separation disc for a centrifugal separator having spacing members with a triangular shape
US20210260605A1 (en) * 2016-10-31 2021-08-26 Alfa Laval Corporate Ab Separation disc for a centrifugal separator having spacing members with a triangular shape
US11123753B2 (en) * 2016-10-31 2021-09-21 Alfa Laval Corporate Ab Centrifugal separator with disc having regions of different densities of spacing members
CN109890510A (zh) * 2016-10-31 2019-06-14 阿法拉伐股份有限公司 分离盘的堆叠
US11660613B2 (en) * 2016-10-31 2023-05-30 Alfa Laval Corporate Ab Separation disc for a centrifugal separator having spacing members with a triangular shape
US20210046490A1 (en) * 2018-03-12 2021-02-18 Hengst Se Rotor for a centrifugal separator and centrifugal separator
US11453015B2 (en) * 2018-03-12 2022-09-27 Hengst Se Rotor for a centrifugal separator and centrifugal separator
CN115324685A (zh) * 2022-10-14 2022-11-11 苏州恩都法汽车系统有限公司 一种离心式分离器和发动机系统

Also Published As

Publication number Publication date
SE316422B (zh) 1969-10-20
GB1098007A (en) 1968-01-03

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