Title:
METHOD OF PREVENTING LUBRICANT FROM DETERIORATING, LUBRICANT, AND DYNAMIC-PRESSURE BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/145305
Kind Code:
A1
Abstract:
[PROBLEMS] To inhibit a lubricant from oxidatively deteriorating; and to provide
a long-life dynamic-pressure bearing device by prolonging the time required
for the lubricity of a lubricant to deteriorate by oxidation. [MEANS FOR SOLVING
PROBLEMS] An ester type lubricating oil is used as a lubricant while continuously
or intermittently bringing it into contact with either an ionic compound or an
ionic-compound solution obtained by dissolving an ionic compound in a solvent.
In the dynamic-pressure bearing device, an ionic compound is disposed in the
bearing or part of a shaft member and is brought into contact with the lubricating
oil. The ionic compound or ionic-compound solution is substantially insoluble
in the ester-type lubricating oil.
Inventors:
TSUBATA SAYURI (JP)
SAGAE CHIKARA (JP)
KOBAYASHI TOSHIMASA (JP)
SAGAE CHIKARA (JP)
KOBAYASHI TOSHIMASA (JP)
Application Number:
PCT/JP2007/062074
Publication Date:
December 21, 2007
Filing Date:
June 15, 2007
Export Citation:
Assignee:
NIDEC CORP (JP)
TSUBATA SAYURI (JP)
SAGAE CHIKARA (JP)
KOBAYASHI TOSHIMASA (JP)
TSUBATA SAYURI (JP)
SAGAE CHIKARA (JP)
KOBAYASHI TOSHIMASA (JP)
International Classes:
C10M169/04; F16C17/10; F16C33/10; G11B19/20; H02K7/08; C10M105/34; C10M105/36; C10M105/38; C10M125/10; C10M129/32; C10M129/34; C10M133/06; C10N10/02; C10N10/04; C10N30/10; C10N40/02
Domestic Patent References:
| WO2006068270A1 | 2006-06-29 |
Foreign References:
| JPS5430998A | 1979-03-07 | |||
| JPS5430997A | 1979-03-07 | |||
| JPS588799A | 1983-01-18 | |||
| JP2006071104A | 2006-03-16 | |||
| JPH0867796A | 1996-03-12 | |||
| JPS5261673A | 1977-05-21 | |||
| JP2001247887A | 2001-09-14 |
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