US3327938A - Vacuum centrifuge - Google Patents

Vacuum centrifuge Download PDF

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Publication number
US3327938A
US3327938A US461043A US46104365A US3327938A US 3327938 A US3327938 A US 3327938A US 461043 A US461043 A US 461043A US 46104365 A US46104365 A US 46104365A US 3327938 A US3327938 A US 3327938A
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United States
Prior art keywords
oil
housing
shaft
container
bearing 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
US461043A
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English (en)
Inventor
Stallmann Hans
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.)
MARTIN CHRIST Firma
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MARTIN CHRIST Firma
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Publication date
Application filed by MARTIN CHRIST Firma filed Critical MARTIN CHRIST Firma
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Publication of US3327938A publication Critical patent/US3327938A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/08—Other accessories for centrifuges for ventilating or producing a vacuum in the centrifuge

Definitions

  • the present invention relates to centrifuges and, more in particular, the invention concerns a vacuum centrifuge for very high numbers of revolutions, in particular, an ultra centrifuge.
  • the rotor of such an ultra centrifuge is arranged to operate in a vacuum chamber in order to reduce atmospheric or air friction.
  • this problem is solved in that in a centrifuge having a rotor running in a vacuum the leakage oil is automatically returned to the bearing oil container.
  • FIG. 1 illustrates an embodiment of the invention
  • FIG. 2 is a block diagram of a circuit for delaying the operation of the magnetic control valve
  • FIG. 3 shows a switching arrangement for operating the control valve circuit.
  • the rotor housing 1 is closed with a cover 2 and sealed with a vacuum seal 3.
  • the housing is evacuated by the pump unit 5 by way of conduit 4.
  • the pressure in the housing 1 is reduced to about mm. Hg in order to reach a velocity of 60,000 rpm.
  • a driving means or assembly 8 such as a motor drives the rotor 6 by way of its shaft 7.
  • the bearing sleeve 9 is supplied With oil through conduit 10 from a supply tank 11.
  • This tank 11 is disposed at a somewhat higher level than the bearing sleeve 9, so that the oil may flow to the bearing under gravitational force.
  • An oil passage space in the form of an annular chamber 12 is provided above the bearing sleeve 9 through which the rotor shaft '7 extends.
  • a conduit 13 connects the annular chamber 12 with the sump 14.
  • a conduit of relatively small cross-section leads from the bottom of sump 14 to a container 16 which, in turn, is disposed somewhat higher than the supply tank 11.
  • the bottom of container 16 is connected with tank 11 by way of a tubular conduit 17 which is provided with a magnetic valve 18.
  • the magnetic valve 18 is closed so that the conduit 13, sump 14, conduit 15 and container 16 are below 3,327,938 Patented June 27, 1967 normal pressure or in a vacuum.
  • the leakage oil leaving the annular chamber 12 flows into the sump 14 by way of conduit 13 and partly also into the conduit 15.
  • FIG. 2 is a block circuit diagram of a circuit by means of which the operation of the magnetic valve 18 is delayed after valve 19 has opened.
  • the valve 19 or its electromagnet is actuated by way of a switch 20.
  • a delaying circuit for example, a time delay relay or the like, is operated which after expiration of a predetermined time period actuates the opening switch 22 for the valve 18 or its electromagnet.
  • FIG. 3 illustrates the manner in which a switch 1s provided at the wall of the rotor housing 1 and on the cover 2.
  • the cover 2 extends outwardly over the upper border of the Wall of the rotor housing.
  • a support 23 is provided on the wall of the chamber upon which a switch S is mounted, as indicated in dotted lines.
  • This switch includes two stationary contacts 26 and 27 which are engaged by a yoke 24 when the cover 2 s raised permitting the operating member 25 which is schematically illustrated to raise the yoke 24 under the pressure of a spring (not illustrated).
  • a battery B 1s connected in series with the contacts 26 and 27 and with the circuit element 22. This element actuates the electromagnet of the valve 18.
  • a single blade switch 28 is connected which is closed as the centrifuge is operative, as indicated in dotted lines, and which 1s opened when the centrifuge is not in operation, so that when the cover 2 is removed, the battery may be disconnected from the circuit.
  • the oil return system in accordance with the invention can be incorporated in an analogous manner 1n centrifuges where the rotor is suspended, i.e., In an arrangement in which the drive assembly such as a motor is disposed above the housing. In that event a centr fuging disk would be mounted on the shaft of the centrifuge which feeds the leakage oil into an annular chamber analogous to chamber 12 and thence to a container that corresponds to container 14 of the illustrated embodiment.
  • a centrifuge comprising a housing including closure means therefor, driving means disposed externally of said housing, a rotor disposed in said housing and having a shaft extending to said driving means, a bearing Sleeve disposed around said shaft intermediate said rotor and said driving means, evacuating means such as a pump connected to said housing for creating a vacuum, an oil supply tank connected to supply lubricant to said bearing sleeve and said shaft, and means associated with said bearing sleeve operative to collect leakage oil and to return the oil automatically to said supply tank, said means including an oil passage space around said shaft, a sump disposed externally of said housing, a conduit connecting said passage space to said sump, a container for oil disposed at a level above said supply tank and a conduit connecting said sump to said container, a tubular conduit connecting said container with said supply tank, and a magnetic valve connected in said tubular conduit operative to control the flow of oil from said container to said supply tank.
  • evacuating means such as a pump connected to
  • a centrifuge comprising a housing including closure means therefor, driving means disposed externally of said housing, a rotor disposed in said housing and having a shaft extending to said driving means, a bearing sleeve disposed around said shaft intermediate said rotor and said driving means, evacuating means such as a pump connected to said housing for creating a vacuum, an oil supply tank connected to supply lubricant to said bearing sleeve and said shaft, and means associated With said bearing sleeve operative to collect leakage oil and to return the oil automatically to said supply tank, said means including an oil passage space around said shaft, a sump disposed externally of said housing, a conduit connecting said passage space to said sump, a container for oil disposed at a level above said supply tank and a conduit connecting said sump to said container, a tubular conduit connecting said container with said supply tank, a magnetic valve connected in said tubular conduit operative to control the flow of oil from said container to said supply tank, and valve means associated with said pump and connected to said
  • a centrifuge comprising a housing including closure means therefor, driving means disposed externally of said housing, a rotor disposed in said housing and having a shaft extending to said driving means, a bearing sleeve disposed around said shaft intermediate said rotor and said driving means, evacuating means such as a pump connected to said housing for creating a vacuum, an oil supply tank connected to supply lubricant to said bearing sleeve and said shaft, and means associated with said bearing sleeve operative to collect leakage oil and to return the oil automatically to said supply tank, said means including an oil passage space around said shaft, a sump disposed externally of said housing, a conduit connecting said passage space to said sump, a container for oil disposed at a level above said supply tank and a conduit connecting said sump to said container, a tubular conduit connecting said container with said supply tank, a magnetic valve connected in said tubular conduit operative to control the flow of oil from said container to said supply tank, and means including a switch associated with the cover of

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  • Centrifugal Separators (AREA)
US461043A 1964-06-10 1965-06-03 Vacuum centrifuge Expired - Lifetime US3327938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC33097A DE1286785B (de) 1964-06-10 1964-06-10 Vakuumzentrifuge

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US3327938A true US3327938A (en) 1967-06-27

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US461043A Expired - Lifetime US3327938A (en) 1964-06-10 1965-06-03 Vacuum centrifuge

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US (1) US3327938A (de)
DE (1) DE1286785B (de)
GB (1) GB1108694A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746247A (en) * 1970-12-23 1973-07-17 Electro Nucleonics Ultracentrifuge with rotor speed identification
US3814306A (en) * 1971-05-06 1974-06-04 Heraeus Christ Gmbh Centrifuge with lubrication system therefor
US3822823A (en) * 1971-03-19 1974-07-09 M Wutz Vacuum centrifuge
US3942716A (en) * 1973-01-15 1976-03-09 Beckman Instruments, Inc. Flow-thru vacuum bushing for ultracentrifuges
US4018304A (en) * 1975-10-08 1977-04-19 Baxter Travenol Laboratories, Inc. Lubrication system for a centrifugal liquid processing system
US4196844A (en) * 1979-03-15 1980-04-08 Beckman Instruments, Inc. Closing structure for centrifuge vacuum chamber
US4205779A (en) * 1979-03-14 1980-06-03 Beckman Instruments, Inc. Pressure bypass ports for an ultracentrifuge drive system in a vacuum environment
FR2567208A1 (fr) * 1984-07-05 1986-01-10 Cit Alcatel Pompe rotative a vide eleve
US4941866A (en) * 1986-11-20 1990-07-17 Gorodissky Boris P Centrifuge
US5137604A (en) * 1990-07-06 1992-08-11 Savant Instruments, Inc. Apparatus for drying biological specimens
US5217572A (en) * 1989-03-20 1993-06-08 Jouan Centrifugal evaporator-concentrator for concentrating specimens by evaporation of the solvent
US20050065010A1 (en) * 2002-03-22 2005-03-24 Reinhard Moss Separator
US20110021332A1 (en) * 2009-07-27 2011-01-27 Hitachi Koki Co., Ltd. Centrifuge and control method thereof
US20130184140A1 (en) * 2012-01-18 2013-07-18 Hitachi Koki Co., Ltd. Centrifuge
US20130190159A1 (en) * 2012-01-24 2013-07-25 Hitachi Koki Co. Ltd. Centrifuge
CN103406214A (zh) * 2013-08-30 2013-11-27 安徽信灵检验医学科技有限公司 生物标本安全离心机
US10357787B2 (en) 2009-03-06 2019-07-23 Alfa Laval Corporate Ab Centrifugal separator having energy consumption reducing devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005001539U1 (de) * 2005-02-01 2006-06-14 Westfalia Separator Ag Separator mit einem Kurzspindelantrieb
CN102189042A (zh) * 2010-03-16 2011-09-21 上海市离心机械研究所有限公司 卧螺离心机与液压站的一体式配置结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2347751A (en) * 1941-06-02 1944-05-02 Phillips Petroleum Co Pumping system
US2733857A (en) * 1956-02-07 beams

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1014349B (de) * 1953-09-10 1957-08-22 Anschuetz & Co Gmbh Ultrazentrifuge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733857A (en) * 1956-02-07 beams
US2347751A (en) * 1941-06-02 1944-05-02 Phillips Petroleum Co Pumping system

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746247A (en) * 1970-12-23 1973-07-17 Electro Nucleonics Ultracentrifuge with rotor speed identification
US3822823A (en) * 1971-03-19 1974-07-09 M Wutz Vacuum centrifuge
US3814306A (en) * 1971-05-06 1974-06-04 Heraeus Christ Gmbh Centrifuge with lubrication system therefor
US3942716A (en) * 1973-01-15 1976-03-09 Beckman Instruments, Inc. Flow-thru vacuum bushing for ultracentrifuges
US4018304A (en) * 1975-10-08 1977-04-19 Baxter Travenol Laboratories, Inc. Lubrication system for a centrifugal liquid processing system
US4205779A (en) * 1979-03-14 1980-06-03 Beckman Instruments, Inc. Pressure bypass ports for an ultracentrifuge drive system in a vacuum environment
US4196844A (en) * 1979-03-15 1980-04-08 Beckman Instruments, Inc. Closing structure for centrifuge vacuum chamber
FR2567208A1 (fr) * 1984-07-05 1986-01-10 Cit Alcatel Pompe rotative a vide eleve
US4588361A (en) * 1984-07-05 1986-05-13 Compagnie Industrielle Des Telecommunications Cit-Alcatel High vacuum rotary pump
US4941866A (en) * 1986-11-20 1990-07-17 Gorodissky Boris P Centrifuge
US5217572A (en) * 1989-03-20 1993-06-08 Jouan Centrifugal evaporator-concentrator for concentrating specimens by evaporation of the solvent
US5137604A (en) * 1990-07-06 1992-08-11 Savant Instruments, Inc. Apparatus for drying biological specimens
US20050065010A1 (en) * 2002-03-22 2005-03-24 Reinhard Moss Separator
US6988980B2 (en) * 2002-03-22 2006-01-24 Westfalia Separator Ag Separator with bearing lubrication arrangement
US10357787B2 (en) 2009-03-06 2019-07-23 Alfa Laval Corporate Ab Centrifugal separator having energy consumption reducing devices
US10427171B2 (en) 2009-03-06 2019-10-01 Alfa Laval Corporate Ab Centrifugal separator having energy consumption reducing devices
US11396026B2 (en) 2009-03-06 2022-07-26 Alfa Laval Corporate Ab Centrifugal separator having energy consumption reducing devices
US20110021332A1 (en) * 2009-07-27 2011-01-27 Hitachi Koki Co., Ltd. Centrifuge and control method thereof
US8409068B2 (en) * 2009-07-27 2013-04-02 Hitachi Koki Co., Ltd. Centrifuge with vacuum pump and control method thereof
US20130184140A1 (en) * 2012-01-18 2013-07-18 Hitachi Koki Co., Ltd. Centrifuge
US8852069B2 (en) * 2012-01-18 2014-10-07 Hitachi Koki Co., Ltd. Centrifuge with vacuum pump configured of auxiliary vacuum pump and oil diffusion pump
US20130190159A1 (en) * 2012-01-24 2013-07-25 Hitachi Koki Co. Ltd. Centrifuge
US9056320B2 (en) * 2012-01-24 2015-06-16 Hitachi Koki Co., Ltd. Centrifuge including depressurization unit and cooling unit that cooperate with each other
CN103406214A (zh) * 2013-08-30 2013-11-27 安徽信灵检验医学科技有限公司 生物标本安全离心机

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Publication number Publication date
DE1286785B (de) 1969-01-09
GB1108694A (en) 1968-04-03

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