SG77700A1 - Axial bearing fly-height measurement to detect oil deficiency - Google Patents

Axial bearing fly-height measurement to detect oil deficiency

Info

Publication number
SG77700A1
SG77700A1 SG1999003662A SG1999003662A SG77700A1 SG 77700 A1 SG77700 A1 SG 77700A1 SG 1999003662 A SG1999003662 A SG 1999003662A SG 1999003662 A SG1999003662 A SG 1999003662A SG 77700 A1 SG77700 A1 SG 77700A1
Authority
SG
Singapore
Prior art keywords
axial bearing
height measurement
detect oil
oil deficiency
bearing fly
Prior art date
Application number
SG1999003662A
Other languages
English (en)
Inventor
Chen-Hsiung Lee
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of SG77700A1 publication Critical patent/SG77700A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Sliding-Contact Bearings (AREA)
SG1999003662A 1998-08-05 1999-07-29 Axial bearing fly-height measurement to detect oil deficiency SG77700A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/129,976 US6173234B1 (en) 1998-08-05 1998-08-05 Axial bearing fly-height measurement to detect oil deficiency

Publications (1)

Publication Number Publication Date
SG77700A1 true SG77700A1 (en) 2001-01-16

Family

ID=22442459

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1999003662A SG77700A1 (en) 1998-08-05 1999-07-29 Axial bearing fly-height measurement to detect oil deficiency

Country Status (5)

Country Link
US (1) US6173234B1 (ko)
JP (1) JP3170495B2 (ko)
KR (1) KR100327804B1 (ko)
MY (1) MY115923A (ko)
SG (1) SG77700A1 (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6907769B2 (en) * 2001-12-20 2005-06-21 Seagate Technology Llc Apparatus and method for detecting air contamination in fluid dynamic bearings
US6804987B2 (en) * 2002-01-03 2004-10-19 Seagate Technology Llc Apparatus and method for air-contamination detection in disc drive hydrodynamic bearings
US6795779B2 (en) * 2002-09-06 2004-09-21 General Electric Company High resolution torque measurement on a rotating shaft
DE10316940B4 (de) * 2003-04-12 2007-05-24 Minebea Co., Ltd. Meßverfahren an einem Elektromotor und Meßvorrichtung für einen Elektromotor zur Bestimmung von Abhebehöhe und/oder axialem Spiel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173299A (en) * 1961-10-26 1965-03-16 United Aircraft Corp Air bearing position indicating system
US4464935A (en) * 1983-05-09 1984-08-14 General Electric Company Shaft vibration evaluation
JPS604617A (ja) * 1983-06-24 1985-01-11 Canon Inc 動圧流体軸受
JPS62132282A (ja) * 1985-12-03 1987-06-15 Fujitsu Ltd 浮上型磁気ヘツドの浮上試験方法
US5067528A (en) * 1989-07-19 1991-11-26 Digital Equipment Corporation Hydrodynamic bearing
US5066197A (en) * 1990-07-10 1991-11-19 Sundstrand Corporation Hydrodynamic bearing protection system and method
US5036235A (en) * 1990-07-25 1991-07-30 Xerox Corporation Brushless DC motor having a stable hydrodynamic bearing system
JP3383060B2 (ja) * 1994-01-31 2003-03-04 日本電産株式会社 流体軸受の擦れ検査装置及び擦れ検査方法
US5612845A (en) * 1994-12-27 1997-03-18 International Business Machines Corporation Method and apparatus for in-situ detection of data storage system spindle motor performance degradation
US5524728A (en) * 1995-06-28 1996-06-11 Quantum Corporation Method and apparatus for applying lubricant to a hydrodynamic bearing
US5601125A (en) * 1995-07-18 1997-02-11 Seagate Technology, Inc. Vacuum fill technique for hydrodynamic bearing

Also Published As

Publication number Publication date
JP3170495B2 (ja) 2001-05-28
JP2000055788A (ja) 2000-02-25
KR20000016958A (ko) 2000-03-25
KR100327804B1 (ko) 2002-03-09
MY115923A (en) 2003-09-30
US6173234B1 (en) 2001-01-09

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