GB2322730B - Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive - Google Patents

Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive

Info

Publication number
GB2322730B
GB2322730B GB9810554A GB9810554A GB2322730B GB 2322730 B GB2322730 B GB 2322730B GB 9810554 A GB9810554 A GB 9810554A GB 9810554 A GB9810554 A GB 9810554A GB 2322730 B GB2322730 B GB 2322730B
Authority
GB
United Kingdom
Prior art keywords
electrically conductive
disc drive
pct
hydro bearing
metallic additive
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
GB9810554A
Other languages
English (en)
Other versions
GB9810554D0 (en
GB2322730A (en
Inventor
Raquib Uddin Khan
Samnathan Murthy
Norbert S Parsoneault
Hans L Leuthold
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB9810554D0 publication Critical patent/GB9810554D0/en
Publication of GB2322730A publication Critical patent/GB2322730A/en
Application granted granted Critical
Publication of GB2322730B publication Critical patent/GB2322730B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1677—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/026—Sliding-contact bearings for exclusively rotary movement for radial load only with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
    • F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
    • 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
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/107—Grooves for generating pressure
    • 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
    • F16C33/109—Lubricant compositions or properties, e.g. viscosity
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • 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
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • 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
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • G11B19/2036—Motors characterized by fluid-dynamic bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
    • 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
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Lubricants (AREA)
  • Sliding-Contact Bearings (AREA)
  • Rotational Drive Of Disk (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
GB9810554A 1995-11-16 1996-11-14 Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive Expired - Fee Related GB2322730B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US684295P 1995-11-16 1995-11-16
PCT/US1996/018366 WO1997018562A1 (en) 1995-11-16 1996-11-14 Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive

Publications (3)

Publication Number Publication Date
GB9810554D0 GB9810554D0 (en) 1998-07-15
GB2322730A GB2322730A (en) 1998-09-02
GB2322730B true GB2322730B (en) 1999-08-04

Family

ID=21722889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9810554A Expired - Fee Related GB2322730B (en) 1995-11-16 1996-11-14 Disc drive hydro bearing lubricant with electrically conductive, non-metallic additive

Country Status (7)

Country Link
US (1) US5940246A (enExample)
JP (1) JP2000500898A (enExample)
KR (1) KR100465402B1 (enExample)
CN (1) CN1127069C (enExample)
DE (1) DE19681651T1 (enExample)
GB (1) GB2322730B (enExample)
WO (1) WO1997018562A1 (enExample)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19681634T1 (de) * 1995-10-30 1998-12-03 Seagate Technology Plattenlaufwerk-Spindelmotor mit Hydrolager mit optimierter Schmiermittelviskosität
WO1998043245A1 (en) * 1997-03-25 1998-10-01 Koyo Seiko Co., Ltd. Information equipment
TW468009B (en) * 1997-11-20 2001-12-11 Koninkl Philips Electronics Nv Electromotor
JP2000310225A (ja) * 1999-04-26 2000-11-07 Matsushita Electric Ind Co Ltd 流体軸受装置およびそれを使用した磁気ディスク装置
US6313967B1 (en) * 1999-08-03 2001-11-06 Maxtor Corporation Disk drive spindle air bearing
US6483215B1 (en) 1999-10-13 2002-11-19 Maxtor Corporation Hybrid air/fluid bearing
JP4029533B2 (ja) * 1999-10-21 2008-01-09 株式会社ジェイテクト 動圧軸受用導電性潤滑剤
JP4757379B2 (ja) * 1999-12-13 2011-08-24 新日鐵化学株式会社 潤滑油組成物
US6952324B2 (en) * 2001-10-18 2005-10-04 Seagate Technology, Llc Hydrodynamic fluid bearing containing lubricants with reduced temperature sensitivity for disk drive application
US6678115B2 (en) 2001-11-08 2004-01-13 Seagate Technology Llc Hydrodynamic fluid bearing containing lubricants with reduced bubble forming tendency for disk drive application
US7345844B2 (en) * 2002-07-23 2008-03-18 Seagate Technology Llc Servo track writer with helium bearing
US7239477B2 (en) * 2002-11-05 2007-07-03 Seagate Technology Llc Low profile air-oil hybrid fluid dynamic bearing motor
US6961214B2 (en) * 2002-12-19 2005-11-01 Seagate Technology Llc Refinement of spindle motor bearing gap
US20050056303A1 (en) * 2003-09-16 2005-03-17 Wei-Ming Lee Oblique burnish/wipe mechanism for hard drive disk like media
US7001074B2 (en) * 2003-04-21 2006-02-21 Seagate Technology Llc High pressure barrier to oil loss by diffusion
US7234868B2 (en) * 2003-05-07 2007-06-26 Seagate Technology Llc Radial pumping oil seal for fluid dynamic bearing motor
US7212376B2 (en) * 2003-09-26 2007-05-01 Hitachi Global Storage Netherlands, B.V. Disk drive system with hydrodynamic bearing lubricant having charge-control additive comprising dioctyldiphenylamine and/or oligomer thereof
US7776802B2 (en) * 2004-12-07 2010-08-17 Panasonic Corporation Hydrodynamic bearing device, and spindle motor and information device using the same
US8562222B2 (en) * 2005-06-24 2013-10-22 Seagate Technology Llc Hub and spindle assembly
US7708904B2 (en) 2005-09-09 2010-05-04 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
US8353740B2 (en) 2005-09-09 2013-01-15 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
US7679243B2 (en) * 2005-12-22 2010-03-16 Seagate Technology Llc Motor assembly with multifunctional components
US7843664B2 (en) * 2006-02-09 2010-11-30 Seagate Technology Llc Electrostatic discharge apparatus for hub and spindle assemblies
JP2007321968A (ja) 2006-06-05 2007-12-13 Matsushita Electric Ind Co Ltd 流体軸受装置、ならびにそれを用いたスピンドルモータ及び情報装置
US8454238B2 (en) * 2006-08-23 2013-06-04 Seagate Technology Llc Spindle regions
US8759266B2 (en) * 2007-03-20 2014-06-24 Exxonmobil Research And Engineering Company Lubricant composition with improved electrical properties
WO2011017629A1 (en) * 2009-08-06 2011-02-10 Seagate Technology Llc Hydrodynamic disc drive spindle motors having hydro bearing with lubricant including conductivity inducing agent
US8531195B2 (en) * 2010-08-26 2013-09-10 Ferrotec (Usa) Corporation Failure indicator seal for a rotary feedthrough
JP6040986B2 (ja) 2012-06-07 2016-12-07 新日本理化株式会社 流体軸受用潤滑油基油
US9368150B2 (en) 2014-09-24 2016-06-14 HGST Netherlands B.V. Charge control agent for fluid dynamic bearing motor lubricant
BR112020017516B1 (pt) * 2018-03-02 2024-04-30 Weg Equipamentos Elétricos S/A Conjunto de mancal de rolamento e sistema de lubrificação para o conjunto de mancal de uma máquina elétrica girante
WO2020129944A1 (ja) 2018-12-20 2020-06-25 新日本理化株式会社 流体軸受用潤滑油基油

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673997A (en) * 1985-03-20 1987-06-16 Ferrofluidics Corporation Electrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used therein
US4772032A (en) * 1987-03-02 1988-09-20 Ferrofluidics Corporation Compact magnetic fluid low pressure seal
US4824122A (en) * 1987-03-02 1989-04-25 Ferrofluidics Corporation Compact magnetic fluid low pressure seal
US4898480A (en) * 1987-02-09 1990-02-06 Ferrofluidics Corporation Compact ferrofluidic electrically conducting sealed bearing
US5367416A (en) * 1992-12-31 1994-11-22 International Business Machines Corporation Spindle grounding device using magnetic fluid

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Publication number Priority date Publication date Assignee Title
FR1604019A (enExample) * 1968-12-06 1971-06-28
US4692826A (en) * 1982-12-16 1987-09-08 Ferrofluidics Corporation Bearing assembly with integrated ferrofluid seal
US4628384A (en) * 1983-08-26 1986-12-09 Ferrofluidics Corporation Bearing assembly with integrated ferrofluid seal
JPH081263B2 (ja) * 1988-12-28 1996-01-10 株式会社東芝 磁性流体シール
JPH03268272A (ja) * 1990-03-16 1991-11-28 Matsushita Electric Ind Co Ltd 磁気記録再生装置
US5155640A (en) * 1990-05-03 1992-10-13 Microscience International Corp. Disk spindle motor cap

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673997A (en) * 1985-03-20 1987-06-16 Ferrofluidics Corporation Electrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used therein
US4898480A (en) * 1987-02-09 1990-02-06 Ferrofluidics Corporation Compact ferrofluidic electrically conducting sealed bearing
US4772032A (en) * 1987-03-02 1988-09-20 Ferrofluidics Corporation Compact magnetic fluid low pressure seal
US4824122A (en) * 1987-03-02 1989-04-25 Ferrofluidics Corporation Compact magnetic fluid low pressure seal
US5367416A (en) * 1992-12-31 1994-11-22 International Business Machines Corporation Spindle grounding device using magnetic fluid

Also Published As

Publication number Publication date
JP2000500898A (ja) 2000-01-25
DE19681651T1 (de) 1998-10-15
GB9810554D0 (en) 1998-07-15
KR100465402B1 (ko) 2005-02-28
WO1997018562A1 (en) 1997-05-22
KR19990067214A (ko) 1999-08-16
US5940246A (en) 1999-08-17
GB2322730A (en) 1998-09-02
HK1015933A1 (en) 1999-10-22
CN1200831A (zh) 1998-12-02
CN1127069C (zh) 2003-11-05

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20151114