AEROSTATIC RADIAL BEARING

WIPO Patent Application WO/2014/034368

A1

Provided is an aerostatic radial bearing with which a compressed gas can be uniformly discharged from the entire bearing surface, and with which a high contraction effect can be obtained. This aerostatic radial bearing (1A) is equipped with: a cylindrical first metal powder sintered layer part (2A), the inner circumferential surface (21) of which is a bearing surface; a second metal powder sintered layer (3) formed on the outer circumferential surface (22) of the first metal powder sintered layer part (2A) and having a higher porosity than that of the first metal powder sintered layer part (2A); and a back metal (4) formed on the outer circumferential surface (32) of the second metal powder sintered layer (3). A bead-type bronze alloy powder for which the average grain diameter is substantially the same is used as the material for forming the first and second metal powder sintered layer parts (2A, 3). The second metal powder sintered layer part (3) is arranged within a metal sleeve, with the first metal powder sintered layer part (2A) as a core, and the gap between this core and the sleeve is filed with the bead-type bronze alloy powder, and sintering is performed at a lower temperature and for a shorter time than for the first metal powder sintered layer (2A), thus making the porosity higher than that of the metal powder sintered layer (2A).

KUMAGAI NAOFUMI (JP)

PCT/JP2013/070860

March 06, 2014

August 01, 2013

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OILES INDUSTRY CO LTD (JP)

F16C32/06; F16C33/12

JPH1162966A	1999-03-05
JP2005221002A	2005-08-18
JP2000009142A	2000-01-11
JP2006097797A	2006-04-13

OHZEKI, Mitsuhiro (JP)
Mitsuhiro Ozeki (JP)

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