Title:
FLUID DYNAMIC PRESSURE BEARING LUBRICANT OIL COMPOSITION, FLUID DYNAMIC PRESSURE BEARING, AND FLUID DYNAMIC PRESSURE BEARING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/243496
Kind Code:
A1
Abstract:
This fluid dynamic pressure bearing lubricant oil composition is to be used in a fluid dynamic pressure bearing 8 in which radial dynamic pressure generation units A1, A2 are provided to the inner circumferential surface 8a of a porous body, and has the following compositional makeup. Specifically, a base oil having a kinematic viscosity of more than 30 mm2/s but not more than 80 mm2/s at 40°C is used as the base oil of the lubricant oil composition. In addition, the compositional makeup of the lubricant oil composition is adjusted such that the kinematic viscosity of the lubricant oil composition at 40°C is 90-140 mm2.
Inventors:
KOMATSUBARA SHINJI (JP)
OSANAI DAI (JP)
OSANAI DAI (JP)
Application Number:
PCT/JP2023/021062
Publication Date:
December 21, 2023
Filing Date:
June 06, 2023
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
NOK KLUEBER CO LTD (JP)
NOK KLUEBER CO LTD (JP)
International Classes:
C10M171/02; F16C17/02; F16C17/04; F16C33/10; H02K5/167; C10M105/32; C10M107/02; C10N20/02; C10N30/06; C10N40/02
Domestic Patent References:
| WO2011155513A1 | 2011-12-15 |
Foreign References:
| JP2012013167A | 2012-01-19 | |||
| JP2004018597A | 2004-01-22 | |||
| JP2008266377A | 2008-11-06 | |||
| JP2015064019A | 2015-04-09 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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