US2913169A - Centrifuge drive arrangement - Google Patents

Centrifuge drive arrangement Download PDF

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Publication number
US2913169A
US2913169A US610277A US61027756A US2913169A US 2913169 A US2913169 A US 2913169A US 610277 A US610277 A US 610277A US 61027756 A US61027756 A US 61027756A US 2913169 A US2913169 A US 2913169A
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US
United States
Prior art keywords
bearing
spindle
sleeve
centrifuge
protective sleeve
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.)
Expired - Lifetime
Application number
US610277A
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English (en)
Inventor
Wilsmann Wilhelm
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
Westfalia Separator 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 Westfalia Separator GmbH filed Critical Westfalia Separator GmbH
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Publication of US2913169A publication Critical patent/US2913169A/en
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H02K7/16—Structural association with mechanical loads, e.g. with hand-held machine tools or fans for operation above the critical speed of vibration of the rotating parts

Definitions

  • This invention relates to animprovedcentrifuge drive arrangement.
  • the invention more particularly relates to an improved drive arrangement for centrifuges provided with a vertical drive spindle which is directly driven by an electric motor.
  • the centrifuge In centrifuges, such as centrifugal separators, which are directly driven by an electric motor, the centrifuge generally has a vertical drive spindle rotatably mounted by means of an upper and lower bearing in a centrifuge frame.
  • the centrifugal bowl is mounted above on the Vertical drive spindle, and the :electric drive motor is mounted below the drive spindle in axial alignment therewith and directly connected to the drive spindle, as, for example, by means of an elastic coupling.
  • the lower bearing which is generally developed as a selfaligning swing bearing, supports the Weight of the centrifugal drum and the spindle in an axial direction, while the upper bearing is developed with radial elasticity in order to be able to take up the radial oscillations of the spindle during operation.
  • the bearings are generally grease-lubricated bearings, asfor example,.ball or roller bearings which are packed with grease to assure smooth and easy operation.
  • One object of this invention is a bearing and motor arrangement for a centrifuge of the above-mentioned type which avoids the above-mentioned disadvantages.
  • the centrifuge frame defines an upper and a,lower chamber-surroundinggthe upper and lower bearing, respectively. These chambers define liquid-retaining troughsat'their bottom portion having outletdrain means.
  • the upper-bearing, and preferably both the upper and lower-bearings, are protected by protective sleeves which surround the same and-preferably terminate with,th eir upper ends closely adjacent the spindle. 1 a
  • Fig. 1 is a vertical axial section of the structure embodying this.invention.
  • Fig. 2 is a further showing of the same showing the feature of the lever bearing protection from moisture.
  • the drive shaft 1 of the electric drive motor 2. is connected by, the flexible coupling. 3 withthe vertical drive spindle 4'whichcarries the centrifugal bowl 5.
  • the vertical drive spindle 4' whichcarries the centrifugal bowl 5.
  • Such coupling arrangement is conventionaLfand any other knownor conventional arrangement may be used which will'take up the shocks of starting and stopping and during operation, and which will allow a limited flexing of'the spindle with respect to the motor during operation.
  • the vertical spindle 4 is supported in'the centrifuge frame l6fby means-of an upper grease-lubricated ball bearing 16 and alower grease-lubricated ball bearing 7.
  • the cen'trifugelfi defines an upper chamber-19 and a lower chamber ⁇ 20, which have the horizontally extending partitions 17 and '18, respectively, which form liquidretaining troughs at the bottom .of the chambers and which'support the upper and lower bearings,frespectively.
  • The'frame 16 additionallyi'defines an annular ⁇ space 26 below the lower bearing '7. and the lower chamber .20.
  • the lower ball bearing 7 is formed as a self-aligning swing bearing which will allow a limited pivoting of the spindle 4 with this bearing acting as a point of pivot.
  • a protective sleeve 12 Surrounding the bearing 7 is a protective sleeve 12, in which the outer race of the bearing is mounted.
  • the sleeve 12 is bell-shaped and mounted in the partition 18.
  • the upper portion of the protective sleeve 12 closely surrounds the spindle and a labyrinth seal cap 10 is mounted on the spindle, sealing the upper end of the protective sleeve 12 from moisture.
  • the bottom of the protective sleeve 12 is sealed by means of a bottom cover plate 13, which is held in place by the expanded snap ring 15, which fits into an appropriate groove in the inner surface of the sleeve.
  • the upper bearing 6 has its outer race mounted in a protective sleeve '8, which is bell-shaped and which closely surrounds the spindle at its upper end and which is provided with a-cover plate 11 atits-lower-endmaintaincd in place by an expanded snap ring 14.
  • the protective sleeve 8 is mounted in a second cylindrical sleeve 24, which is secured by means of its upper lip to the partition 17.
  • the second sleeve 24 is of smaller diameter than the opening through the partition 17 and is resiliently maintained in place by springs which allow resilient lateral movement.
  • a labyrinthcap seal 9 surrounds the spindle 4, sealing the upper end of the protective sleeve 8.
  • the cap 9 also co-operates with the flange 23 to form a double labyrinth seal.
  • the flange 23 is screwed to the partition 17 and holds the second sleeve 24 secure from axial movement.
  • the second bearing sleeve 24 is provided with openings in the side wall thereof, so that moisture penetrating the labyrinth seal caused by the cap. 9 may run over the outer surface of the protective sleeve 8 through these openings into the lower chamber 20.
  • the electric motor 2 drives the vertical drive spindle 4 in the conventional manner, which causes rotation of the centrifugal bowl or drum 5. Any liquid over-flowing from the bowl will enter the chamber .19, collect'in the trough at the lower portion of this chamber, and will be discharged through the discharge pipe 22.
  • the protective sleeve 8 and the labyrinth cap seal 9 protect the bearing 6 from this liquid. If any moist air or liquid passes through the upper labyrinth seal formed by labryrinth cap 9, the same will merely pass down over the outer surface of the protective sleeve 8 through the opening in the second sleeve 24 and into the lower cham ber 20, where the same will collect in the lower trough anddrain oif through the drain opening 25. This also holds true for moisture which may penetrate the upper labyrinth seal and condense in the lower chamber.
  • the lower bearing is protected from this moisture by means of its protective sleeve 12 and cap 10 Should, however, any moisture enter through the bottom bearing 7, this moisture will accumulate in the annular space 26 and be discharged through the small pipes 27.
  • the portion where the drive shaft and coupling extend through the annular chamber is protected by a labyrinth cap similar to that used in connection with the bearing.
  • the bearings and the motor are thus positively protectedj from the deleteriouseifects of the liquid which overflows from the bowl and the life of the bearing shaft, and the motor is greatly increased.
  • a centrifuge having a vertical drive spindle rotatably mounted by means of an upper and lower hearing in a centrifuge frame and having an electric drive motor vertically mounted below said drive spindle directly connected thereto for drive actuation
  • said centrifuge frame defining a horizontally extending partition dividing said centrifuge frame into an upper and lower chamber surrounding said upper and lower bearings respectively, said chambers defining liquid retaining troughs at their bottom portions having outlet drains leading out of said centrifuge frame, a protective sleeve surrounding said upper bearing and a labyrinth seal surrounding said spindle and sealing the upper portion of said sleeve, said labyrinth seal being mounted to participate in the radial oscillations of the spindle during operation.
  • Improvement according to claim 1 including a passage communicating said upper and lower chamber for liquid passing through said labyrinth seal over said sleeve.
  • said protective sleeve is a bell shaped sleeve .with its upper end closely surrounding said spindle and including a cover sealing the bottom of said sleeve.
  • Improvement according to claim 5 including a protective sleeve surrounding said lower bearings.
  • Improvement according to claim 6, including a labyrinth seal surrounding said spindle and sealing the upper portion of said protective sleeve surrounding said lower bearing.
  • said centrifuge frame defines a horizontally extending partition defining said'trough for said upper chamber and separating said chambers
  • said protective sleeve is mounted in a second cylindrical sleeve in said partition, and'including a second protective sleeve sur- UNITED STATES PATENTS 984,242 Sanford et al Feb. 14, 1911 1,006,174 Anker-Holth Oct. 17, 1911 1,598,393" Robertson Aug. 31, 1926 1,888,475 Schmitz Nov. 22, 1932 2,587,418

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Centrifugal Separators (AREA)
US610277A 1955-09-19 1956-09-17 Centrifuge drive arrangement Expired - Lifetime US2913169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE838418X 1955-09-19

Publications (1)

Publication Number Publication Date
US2913169A true US2913169A (en) 1959-11-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US610277A Expired - Lifetime US2913169A (en) 1955-09-19 1956-09-17 Centrifuge drive arrangement

Country Status (3)

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US (1) US2913169A (fr)
FR (1) FR1168916A (fr)
GB (1) GB838418A (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034317A (en) * 1959-02-18 1962-05-15 Ross Temp Inc Apparatus for making flake ice
US3065611A (en) * 1961-02-16 1962-11-27 Freez King Corp Freezer
US3097167A (en) * 1957-02-20 1963-07-09 Beyerle Konrad Damping bearing for the shafts of a gas centrifuge
US3433540A (en) * 1965-11-27 1969-03-18 John C Schneider Fluid-tight shaft seal assembly
US3884535A (en) * 1974-04-29 1975-05-20 Morgan Construction Co Seal
US3892446A (en) * 1974-04-29 1975-07-01 Morgan Construction Co Shaft seal
EP0017344A1 (fr) * 1979-03-14 1980-10-15 Beckman Instruments, Inc. Entraînement direct pour une ultracentrifuge tournant à grande vitesse
US5342282A (en) * 1992-08-04 1994-08-30 Jouan Centrifuge including a rotor driveshaft with an elastic damping seal and corresponding shaft
US5879279A (en) * 1996-09-05 1999-03-09 U.S. Centrifuge Centrifugal separator apparatus having a vibration sensor
DE19813436A1 (de) * 1998-03-27 1999-09-30 Kendro Lab Prod Gmbh Zentrifuge mit Kupplungsstück zwischen Antriebsmotor und Rotor
US6126587A (en) * 1998-04-08 2000-10-03 U.S. Centrifuge Centrifugal separator apparatus including a plow blade assembly
US20040192532A1 (en) * 2003-03-28 2004-09-30 Westfalia Separator Ag Driving system for a separator
US20060276321A1 (en) * 2003-04-08 2006-12-07 Alfa Laval Corporate Ab Driving device for a centrifugal separator
US20110074254A1 (en) * 2009-09-29 2011-03-31 Critchley Matthew W Electric motor having a rain guard
US20130130885A1 (en) * 2010-03-22 2013-05-23 Alfa Laval Corporate Ab Centrifugal separator
EP2898954A1 (fr) * 2014-01-22 2015-07-29 Alfa Wassermann, Inc. Systèmes de centrifugation avec des ensembles d'étanchéité sans contact

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US984242A (en) * 1910-02-28 1911-02-14 Internat Clarifying Company Centrifugal separator.
US1006174A (en) * 1908-04-29 1911-10-17 Severin C Anker-Holth Cream-separator.
US1598393A (en) * 1921-11-14 1926-08-31 Montgomery Ward & Co Inc Electrical drive for cream separators
US1888475A (en) * 1929-11-05 1932-11-22 Schmitz Carl Liquid excluder for the bearings of centrifugal separators
US2587418A (en) * 1949-05-21 1952-02-26 Electrolux Corp Mounting means for electric motors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1006174A (en) * 1908-04-29 1911-10-17 Severin C Anker-Holth Cream-separator.
US984242A (en) * 1910-02-28 1911-02-14 Internat Clarifying Company Centrifugal separator.
US1598393A (en) * 1921-11-14 1926-08-31 Montgomery Ward & Co Inc Electrical drive for cream separators
US1888475A (en) * 1929-11-05 1932-11-22 Schmitz Carl Liquid excluder for the bearings of centrifugal separators
US2587418A (en) * 1949-05-21 1952-02-26 Electrolux Corp Mounting means for electric motors

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097167A (en) * 1957-02-20 1963-07-09 Beyerle Konrad Damping bearing for the shafts of a gas centrifuge
US3034317A (en) * 1959-02-18 1962-05-15 Ross Temp Inc Apparatus for making flake ice
US3065611A (en) * 1961-02-16 1962-11-27 Freez King Corp Freezer
US3433540A (en) * 1965-11-27 1969-03-18 John C Schneider Fluid-tight shaft seal assembly
US3884535A (en) * 1974-04-29 1975-05-20 Morgan Construction Co Seal
US3892446A (en) * 1974-04-29 1975-07-01 Morgan Construction Co Shaft seal
EP0017344A1 (fr) * 1979-03-14 1980-10-15 Beckman Instruments, Inc. Entraînement direct pour une ultracentrifuge tournant à grande vitesse
US5342282A (en) * 1992-08-04 1994-08-30 Jouan Centrifuge including a rotor driveshaft with an elastic damping seal and corresponding shaft
US6149573A (en) * 1996-09-05 2000-11-21 Balcon, Inc. Centrifugal separator having a clutch assembly
US5879279A (en) * 1996-09-05 1999-03-09 U.S. Centrifuge Centrifugal separator apparatus having a vibration sensor
DE19813436A1 (de) * 1998-03-27 1999-09-30 Kendro Lab Prod Gmbh Zentrifuge mit Kupplungsstück zwischen Antriebsmotor und Rotor
US6248054B1 (en) 1998-04-08 2001-06-19 U.S. Centrifuge Centrifugal separation apparatus having a mechanism to limit rotation of the bowl during a cleaning mode
US6251056B1 (en) 1998-04-08 2001-06-26 U.S. Centrifuge Centrifuge separation apparatus having a fluid handling mechanism
US6126587A (en) * 1998-04-08 2000-10-03 U.S. Centrifuge Centrifugal separator apparatus including a plow blade assembly
US20040192532A1 (en) * 2003-03-28 2004-09-30 Westfalia Separator Ag Driving system for a separator
US7090634B2 (en) * 2003-03-28 2006-08-15 Westfalia Separator Ag Driving system for a separator having a centrifugal drum and a neck bearing
EP1617952B2 (fr) † 2003-04-08 2012-12-26 Alfa Laval Corporate AB Dispositif d'entrainement pour un separateur centrifuge
US20060276321A1 (en) * 2003-04-08 2006-12-07 Alfa Laval Corporate Ab Driving device for a centrifugal separator
US7300396B2 (en) * 2003-04-08 2007-11-27 Alfa Laval Corporate Ab Driving device for a centrifugal separator
US20110074254A1 (en) * 2009-09-29 2011-03-31 Critchley Matthew W Electric motor having a rain guard
US8390161B2 (en) 2009-09-29 2013-03-05 Regal Beloit America, Inc. Electric motor having a rain guard
US20130130885A1 (en) * 2010-03-22 2013-05-23 Alfa Laval Corporate Ab Centrifugal separator
US9333516B2 (en) * 2010-03-22 2016-05-10 Alfa Laval Corporate Ab Centrifugal separator having a support element and bearing around portions of a spindle
EP2898954A1 (fr) * 2014-01-22 2015-07-29 Alfa Wassermann, Inc. Systèmes de centrifugation avec des ensembles d'étanchéité sans contact
JP2015163391A (ja) * 2014-01-22 2015-09-10 アルファ ワッサーマン インコーポレイテッドＡｌｆａ Ｗａｓｓｅｒｍａｎｎ，Ｉｎｃ． 非接触シールアセンブリを有する遠心分離システム
US10016767B2 (en) 2014-01-22 2018-07-10 Alfa Wassermann, Inc. Centrifugation systems with non-contact seal assemblies

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Publication number Publication date
GB838418A (en) 1960-06-22
FR1168916A (fr) 1958-12-18

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