DE3842477C2 - Magnetische Fluiddichtungsanordnung - Google Patents

Magnetische Fluiddichtungsanordnung

Info

Publication number
DE3842477C2
DE3842477C2 DE3842477A DE3842477A DE3842477C2 DE 3842477 C2 DE3842477 C2 DE 3842477C2 DE 3842477 A DE3842477 A DE 3842477A DE 3842477 A DE3842477 A DE 3842477A DE 3842477 C2 DE3842477 C2 DE 3842477C2
Authority
DE
Germany
Prior art keywords
annular
space
sealing
cover
arrangement according
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 - Fee Related
Application number
DE3842477A
Other languages
German (de)
English (en)
Other versions
DE3842477A1 (de
Inventor
Mineyo Endo
Kiyoyoshi Takegami
Noriaki Hishida
Itsuo Miyaji
Shosuke Noguchi
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.)
Nidec Corp
Original Assignee
Nidec 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 Nidec Corp filed Critical Nidec Corp
Publication of DE3842477A1 publication Critical patent/DE3842477A1/de
Application granted granted Critical
Publication of DE3842477C2 publication Critical patent/DE3842477C2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • F16C33/765—Sealings of ball or roller 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Brushless Motors (AREA)
  • Motor Or Generator Frames (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Sealing Of Bearings (AREA)
DE3842477A 1988-07-11 1988-12-16 Magnetische Fluiddichtungsanordnung Expired - Fee Related DE3842477C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988091670U JPH0713425Y2 (ja) 1988-07-11 1988-07-11 スピンドルモータ

Publications (2)

Publication Number Publication Date
DE3842477A1 DE3842477A1 (de) 1990-01-18
DE3842477C2 true DE3842477C2 (de) 1994-06-30

Family

ID=14032918

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3842477A Expired - Fee Related DE3842477C2 (de) 1988-07-11 1988-12-16 Magnetische Fluiddichtungsanordnung

Country Status (3)

Country Link
US (1) US5009436A (US06623731-20030923-C00052.png)
JP (1) JPH0713425Y2 (US06623731-20030923-C00052.png)
DE (1) DE3842477C2 (US06623731-20030923-C00052.png)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155640A (en) * 1990-05-03 1992-10-13 Microscience International Corp. Disk spindle motor cap
US5134331A (en) * 1990-05-31 1992-07-28 Nippon Densan Corporation Spindle motor
US5214326A (en) * 1990-09-01 1993-05-25 Nippon Densan Corporation Spindle motor with magnetic shield for magnetic fluid seal
US5267737A (en) * 1992-01-16 1993-12-07 International Business Machines, Corp. Magnetic fluid seal containment shield
US5396134A (en) * 1992-01-22 1995-03-07 Nagano Nidec Corporation Spindle motor
US5402023A (en) * 1992-08-07 1995-03-28 Nippon Densan Corporation Spindle motor and magnetic fluid seal apparatus used therefor
US5367416A (en) * 1992-12-31 1994-11-22 International Business Machines Corporation Spindle grounding device using magnetic fluid
US5596235A (en) * 1993-02-22 1997-01-21 Nidec Corporation Spindle motor with seal structure
US5834870A (en) * 1994-04-28 1998-11-10 Hitachi, Ltd. Oil impregnated porous bearing units and motors provided with same
US5876037A (en) * 1996-11-19 1999-03-02 Ferrotec Corporation Magnetic fluid sealing device
US5975536A (en) * 1997-09-30 1999-11-02 Rigaku/Usa, Inc. Rotary motion feedthrough with rotating magnet system
JP4073064B2 (ja) * 1997-12-02 2008-04-09 株式会社リガク 耐磁場磁性流体シール装置
DE19849094C2 (de) * 1998-10-24 2003-04-10 Prec Motors Deutsche Minebea G Spindelmotor mit Magnetdichtung
US6229676B1 (en) * 1998-11-13 2001-05-08 International Business Machines Corporation Ferrofluid seal for actuator bearing
US6976682B1 (en) 1999-01-22 2005-12-20 Seagate Technology Llc Apparatus and method for forming a rotatable ferrofluidic seal between a shaft and a hub
DE20116252U1 (de) * 2001-10-04 2002-07-25 Prec Motors Deutsche Minebea G Spindelmotor mit Magnetfluiddichtung
US6558042B1 (en) * 2001-12-28 2003-05-06 Sae Magnetics(H. K.) Ltd. Bearing guided ferrofluid seal and seal carrier
DE102006034966A1 (de) * 2006-07-28 2008-01-31 Schaeffler Kg Wälz- oder Linearlager
TW201204965A (en) * 2010-07-23 2012-02-01 qi-yun Gong Sealing device
JP5806241B2 (ja) * 2011-02-03 2015-11-10 イーグル工業株式会社 磁性流体シール
JP5797600B2 (ja) * 2012-04-26 2015-10-21 グローブライド株式会社 磁性流体シール付き軸受
DE102014014770B4 (de) * 2014-10-10 2016-10-27 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit einem Stator und Rotor
JP7304206B2 (ja) * 2019-05-31 2023-07-06 ミネベアミツミ株式会社 モータ
DE102021105715B4 (de) 2021-03-10 2022-10-20 Schaeffler Technologies AG & Co. KG Linearwälzlager

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851880C (de) * 1948-12-23 1952-10-09 Adolf Dr Razdowitz Dichtung
FR1178840A (fr) * 1956-07-14 1959-05-15 Philips Nv Fermeture au moyen d'un aimant permanent d'une enceinte qui contient des particules magnétiques
US3240341A (en) * 1963-01-14 1966-03-15 Rosaen Filter Co Magnetized gasket assembly
DE2034213C3 (de) * 1969-10-10 1985-04-25 Ferrofluidics Corp., Burlington, Mass. Magnetdichtung zur Abdichtung von Dichtungsspalten
US3834775A (en) * 1972-05-26 1974-09-10 Litton Systems Inc Ferrohydrodynamic low-friction bearing with improved volume compensation and fluid seal
DE2621352B2 (de) * 1976-05-14 1979-03-08 Fa. Carl Freudenberg, 6940 Weinheim Magnetwellendichtung
SU817352A1 (ru) * 1978-03-06 1981-03-30 Ивановский Энергетический Институт Им.B.И.Ленина Подшипниковый узел
US4293137A (en) * 1978-12-11 1981-10-06 Ezekiel Frederick D Magnetic liquid shaft sealing
SU773353A1 (ru) * 1979-04-09 1980-10-23 Предприятие П/Я А-3780 Магнитно-жидкостное уплотнение вращающегос вала
JPS56123757U (US06623731-20030923-C00052.png) * 1980-02-20 1981-09-21
US4519010A (en) * 1980-12-05 1985-05-21 Papst-Motoren Gmbh & Co. Kg Driving mechanism for magnetic hard disc memories
US4424974A (en) * 1981-08-08 1984-01-10 Nippon Telegraph & Telephone Public Corp. Ferro fluidic seal
US4486026A (en) * 1982-02-10 1984-12-04 Nippon Seiko K.K. Sealing and bearing means by use of ferrofluid
JPS5950275A (ja) * 1982-09-16 1984-03-23 Rigaku Keisoku Kk 磁性流体軸封装置
US4407508A (en) * 1982-12-16 1983-10-04 Ferrofluidics Corporation Single-pole-piece ferrofluid seal apparatus and exclusion seal system
JPS6091066A (ja) * 1983-10-26 1985-05-22 Seiko Epson Corp 磁性流体シ−ル機構
JPS6089756U (ja) * 1983-11-28 1985-06-19 日本電産株式会社 ブラシレスモ−タ
US4526379A (en) * 1984-01-09 1985-07-02 Ferrofluidics Corporation Stabilized ferrofluid-ferrofluid seal apparatus and method
US4526382A (en) * 1984-05-03 1985-07-02 Ferrofluidics Corporation Radially polarized multiple-stage ferrofluid seal apparatus
US4502700A (en) * 1984-05-03 1985-03-05 Ferrofluidics Corporation Ferrofluid linear seal apparatus
US4565379A (en) * 1984-05-26 1986-01-21 Gmn Georg Muller Nurnberg Gmbh Magnetic fluid seal
JPS61112868A (ja) * 1984-11-07 1986-05-30 Tdk Corp 磁性流体軸シ−ル
JPS61266873A (ja) * 1984-12-29 1986-11-26 Nippon Fueroo Furuideikusu Kk 磁性流体シ−ル装置
DE8518880U1 (de) * 1985-06-26 1985-08-14 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Deckwand für ein gasbeheiztes Gerät
US4817964A (en) * 1985-09-25 1989-04-04 Ferrofluidics Corporation Ferrofluid exclusion seal and method of assembly
NL8601017A (nl) * 1986-04-21 1987-11-16 Skf Ind Trading & Dev Wentellager.
DE8805661U1 (de) * 1988-04-29 1988-06-23 Papst Licensing Gmbh, 78549 Spaichingen Magnetische Flüssigkeitsdichtung

Also Published As

Publication number Publication date
DE3842477A1 (de) 1990-01-18
JPH0713425Y2 (ja) 1995-03-29
JPH0214276U (US06623731-20030923-C00052.png) 1990-01-29
US5009436A (en) 1991-04-23

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee