FR2552179B3 - Palier mixte a ferrofluide - Google Patents

Palier mixte a ferrofluide

Info

Publication number
FR2552179B3
FR2552179B3 FR8414352A FR8414352A FR2552179B3 FR 2552179 B3 FR2552179 B3 FR 2552179B3 FR 8414352 A FR8414352 A FR 8414352A FR 8414352 A FR8414352 A FR 8414352A FR 2552179 B3 FR2552179 B3 FR 2552179B3
Authority
FR
France
Prior art keywords
shaft
receiving space
ferrofluid
housing
bearing
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
Application number
FR8414352A
Other languages
English (en)
Other versions
FR2552179A1 (fr
Inventor
Philip Stahl
Dudley D Fuller
Harry C Rippel
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.)
Ferrofluidics Corp
Original Assignee
Ferrofluidics Corp
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 Ferrofluidics Corp filed Critical Ferrofluidics Corp
Publication of FR2552179A1 publication Critical patent/FR2552179A1/fr
Application granted granted Critical
Publication of FR2552179B3 publication Critical patent/FR2552179B3/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F16C33/1035—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing by a magnetic field acting on a magnetic liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/74—Sealings of sliding-contact bearings
    • F16C33/741—Sealings of sliding-contact bearings by means of a fluid
    • F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
    • F16C33/746—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap by a magnetic field
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like
FR8414352A 1983-09-21 1984-09-19 Palier mixte a ferrofluide Expired FR2552179B3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/534,415 US4526484A (en) 1983-09-21 1983-09-21 Ferrofluid thrust and radial bearing assembly

Publications (2)

Publication Number Publication Date
FR2552179A1 FR2552179A1 (fr) 1985-03-22
FR2552179B3 true FR2552179B3 (fr) 1986-01-10

Family

ID=24129930

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8414352A Expired FR2552179B3 (fr) 1983-09-21 1984-09-19 Palier mixte a ferrofluide

Country Status (5)

Country Link
US (1) US4526484A (fr)
JP (1) JPS6088223A (fr)
DE (1) DE3433626A1 (fr)
FR (1) FR2552179B3 (fr)
GB (1) GB2147059B (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604229A (en) * 1985-03-20 1986-08-05 Ferrofluidics Corporation Electrically conductive ferrofluid compositions and method of preparing and using same
JPS6272920A (ja) * 1985-09-27 1987-04-03 Nippon Seiko Kk スピンドル
JPS62127513A (ja) * 1985-11-26 1987-06-09 Nippon Seiko Kk スピンドル
JPH066277Y2 (ja) * 1986-06-13 1994-02-16 日本精工株式会社 スピンドル
NL8602343A (nl) * 1986-09-16 1988-04-18 Skf Ind Trading & Dev Glijlager-samenstel.
US4830384A (en) * 1987-06-29 1989-05-16 Ferrofluidics Corporation Compact long-life magnetic fluid seal
US5238254A (en) * 1987-07-17 1993-08-24 Koyo Seiko Co., Ltd. Ferrofluid seal apparatus
US4795275A (en) * 1987-08-12 1989-01-03 Digital Equipment Corporation Hydrodynamic bearing
US5112142A (en) * 1987-08-12 1992-05-12 Digital Equipment Corporation Hydrodynamic bearing
USRE35718E (en) * 1988-06-22 1998-01-27 Hitachi, Ltd. Bearing apparatus
JPH0612128B2 (ja) * 1988-06-22 1994-02-16 株式会社日立製作所 軸受装置
JPH0389020A (ja) * 1989-06-23 1991-04-15 Nippon Thompson Co Ltd 磁性流体軸受
JP2966433B2 (ja) * 1989-07-19 1999-10-25 株式会社日立製作所 磁性流体軸受装置あるいはこの装置を具備するモータ
US5007513A (en) * 1990-04-03 1991-04-16 Lord Corporation Electroactive fluid torque transmission apparatus with ferrofluid seal
US5161900A (en) * 1992-04-10 1992-11-10 International Business Machines, Corp. Self-contained low power fluid bearing and bearing seal
US5328271A (en) * 1992-05-06 1994-07-12 Maxtor Corporation Hydrodynamic spindle bearing for ultra-slim disk storage unit
US5367416A (en) * 1992-12-31 1994-11-22 International Business Machines Corporation Spindle grounding device using magnetic fluid
US5973878A (en) * 1993-12-14 1999-10-26 Hitachi, Ltd. Recording disk apparatus and rotational supporting structure therefor, having a magnetic lubricant seal which is inclined
EP0658895B1 (fr) * 1993-12-14 2000-07-05 Hitachi, Ltd. Appareil d'enregistrement à disque avec structure de support de rotation
US5660397A (en) * 1994-09-23 1997-08-26 Holtkamp; William H. Devices employing a liquid-free medium
US5713670A (en) * 1995-08-30 1998-02-03 International Business Machines Corporation Self pressurizing journal bearing assembly
DE19627418C1 (de) * 1996-07-08 1997-12-18 Daimler Benz Ag Kolben/Büchsen-Einheit für einen Hubkolben-Verbrennungsmotor
JP3663325B2 (ja) * 1999-12-01 2005-06-22 株式会社日立製作所 モータの組立て方法
US20030129855A1 (en) * 2001-12-21 2003-07-10 Douglas Richard E. Current collector assembly and method
US7048520B1 (en) 2002-04-16 2006-05-23 Mccarthy James Multistage sealed coolant pump
DE202005005904U1 (de) * 2005-04-07 2006-08-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Anordnung zur Lagerung einer drehbaren Welle
US7845638B2 (en) * 2007-01-04 2010-12-07 Carestream Health, Inc. Feeder assembly for laser imaging apparatus
US7758320B2 (en) 2007-05-03 2010-07-20 Tank, Inc. Two-stage hydrodynamic pump and method
JP2008219034A (ja) * 2008-04-14 2008-09-18 Fujitsu Ltd 回転式ヒートシンク
KR101071418B1 (ko) * 2009-11-30 2011-10-10 삼성전기주식회사 모터

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112964A (en) * 1961-07-11 1963-12-03 Parechoc Sa Shock-absorber bearing for arbors or pivots of small mechanisms
US3780593A (en) * 1971-10-05 1973-12-25 Gen Motors Corp Magnetic fluid hydrodynamic bearing
US3918773A (en) * 1974-01-07 1975-11-11 Litton Systems Inc Magnetic field responsive hydrodynamic bearing
US4043612A (en) * 1975-06-06 1977-08-23 Ampex Corporation Bearing structure

Also Published As

Publication number Publication date
JPS6088223A (ja) 1985-05-18
GB2147059A (en) 1985-05-01
DE3433626A1 (de) 1985-04-18
FR2552179A1 (fr) 1985-03-22
GB2147059B (en) 1987-03-18
US4526484A (en) 1985-07-02
GB8423772D0 (en) 1984-10-24

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