Hydrodynamic bearing type rotary device

Details Hydrodynamic bearing type rotary device Hydrodynamic bearing type rotary device

2011-03-08

2011-03-08

Pilkington, James (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

Reexamination Certificate

active

07901139

ABSTRACT:
In a hydrodynamic bearing type rotary device, relationships between the number of times of intermittence life, a bearing load, lubricating fluid viscosity, a bearing size, and the like are considered in order to provide a hydrodynamic bearing type rotary device which can secure appropriate intermittence life. In a hydrodynamic bearing type rotary device, a shaft is inserted into a bearing hole of a sleeve so as to be relatively rotatable. A value of a function (Nd) is set to be 100,000 or higher: wherein Nd=η/(S·Ff·P·D).

REFERENCES:
patent: 6264368 (2001-07-01), Tanaka et al.
patent: 6412984 (2002-07-01), Asai et al.
patent: 6749339 (2004-06-01), Murabe et al.
patent: 6805489 (2004-10-01), Nakagawa et al.
patent: 7147376 (2006-12-01), Shimizu et al.
patent: 2004/0179294 (2004-09-01), Asada et al.
patent: 2006/0104554 (2006-05-01), Yamamoto
patent: 2006/0120642 (2006-06-01), Hirata et al.
patent: 61-10939 (1986-01-01), None
Air viscosity chart, obtained from http://www.engineeringtoolbox.com/air-absolute-kinematic-viscosity-d—601.html [Mar. 22, 2010].

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