Hydrodynamic bearing type rotary device and recording and...

Details Hydrodynamic bearing type rotary device and recording and... Hydrodynamic bearing type rotary device and recording and...

2011-05-31

2011-05-31

Charles, Marcus (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S100000

Reexamination Certificate

active

07950854

ABSTRACT:
A hydrodynamic bearing type rotary device includes radial hydrodynamic grooves and thrust hydrodynamic grooves forming communicating channels, communicating holes designed to communicate the groove end of the radial hydrodynamic groove on the side opposite the thrust hydrodynamic grooves with the groove end of the thrust hydrodynamic groove on the side opposite the radial hydrodynamic grooves, and a circulation route composed by the communicating hole, the radial hydrodynamic groove, and the thrust hydrodynamic groove. Lubricating oil is circulated by means of a pump force of the hydrodynamic groove. The hydrodynamic bearing device prevents the formation of low-pressure parts from the bearing portion, preventing the accumulation of air bubbles, and thereby preventing the occurrence of oil film breakage at the radial hydrodynamic groove and the thrust hydrodynamic groove.

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