Hydrodynamic bearing device

Details Hydrodynamic bearing device Hydrodynamic bearing device

1993-09-16

1995-04-04

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384119, 384132, F16C 3206

Patent

active

054030986

ABSTRACT:
A hydrodynamic bearing device incorporates a relatively rotatable shaft 1 and a sleeve 2 internally sealed with the shaft 1. A groove for generating dynamic pressure is formed on an external circumferential surface of the shaft 1 or on internal circumferential surface of the sleeve 2. A circumferential groove 1a is formed at one end of the shaft 1 external to the bearing. An annular sealing plate 3 is secured to the sleeve 2 and interegagging with the shaft 1 external to the bearing and the circumferential groove 1a. A labyrinth is formed between the inner-diametric domain of the sealing plate 3. An annular recessed domain 2c is defined by internal circumferential surface of the sleeve 2 and the sealing plate 3 at a position substantially opposite the circumferential groove 1a. An oil-pooling space 4 thereby formed by the shaft 1, the circumferential groove 1a, the sleeve 2, the sealing plate 3, and the annular recessed domain 2c.

REFERENCES:
patent: 3640590 (1972-02-01), Beisemann
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4883367 (1989-11-01), Maruyama

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