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Title:
DYNAMIC BEARING AND FLUID DYNAMIC BEARING DEVICE PROVIDE WITH SAME
Document Type and Number:
WIPO Patent Application WO/2023/047938
Kind Code:
A1
Abstract:
In a bearing sleeve 8 (dynamic bearing) comprising a cylindrical sintered body having an inner peripheral surface 8a in which dynamic pressure grooves G1 are formed, a ratio D2/D1 between the inner diameter D1 and outer diameter D2 of the sintered body is 2.5 or less, and differences in relative density among three portions 8A, 8B, and 8C obtained by dividing the sintered body into three equal parts in the axial direction are 3% or less.

Inventors:
YAMAGOU MASASHI (JP)
KOMATSUBARA SHINJI (JP)
ITO FUYUKI (JP)
KATO DAICHI (JP)
Application Number:
PCT/JP2022/033378
Publication Date:
March 30, 2023
Filing Date:
September 06, 2022
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C17/02; F16C33/10; F16C33/14
Foreign References:
JP2015064019A2015-04-09
JP2002276666A2002-09-25
JP2019049330A2019-03-28
JP2007255449A2007-10-04
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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