Dynamic pressure pneumatic bearing device and manufacturing meth

Bearings – Rotary bearing – Fluid bearing

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F16C 1702

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active

057695440

ABSTRACT:
A dynamic pressure pneumatic bearing device has a groove for generating a dynamic pressure and formed on an inner circumferential face of a rotating shaft or an outer circumferential face of a fixed shaft; each of these shafts being formed by an aluminum alloy; and a wear resisting film formed on each of the inner circumferential face and the outer circumferential face. Another dynamic pressure pneumatic bearing device is constructed by a rotating shaft having a cylindrical hollow and a fixed shaft inserted into this hollow. The fixed shaft has a bearing face opposed to an inner circumferential face of the rotating shaft and separated from this inner circumferential face with a predetermined clearance. Herringbone grooves for generating a dynamic pressure and recessed portions having the same depth as the herringbone grooves are formed on the bearing face.

REFERENCES:
patent: 4797009 (1989-01-01), Yamazaki
patent: 5046863 (1991-09-01), Sakatani et al.
patent: 5271677 (1993-12-01), Sherman et al.

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