Dynamic groove bearing with a lubricant barrier

Details Dynamic groove bearing with a lubricant barrier Dynamic groove bearing with a lubricant barrier

1996-12-10

1998-03-03

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384132, F16C 3206

Patent

active

057227756

ABSTRACT:
A dynamic groove bearing (9, 83, 95) with an inner bearing pan (15) and an outer bearing part (17) which is rotatable about the inner bearing part (15). The bearing parts (15, 17) are provided with cooperating bearing surfaces (23, 35) between which a bearing gap (45) is present filled with a liquid lubricant (75). The bearing surface (35) of at least one of the bearing pans (17) is provided with a pattern of grooves (51, 53).
The outer bearing part (17) has an annular barrier (69, 87, 99) which is raised with respect to the bearing surface (35) of the outer bearing part (17) and which bounds the bearing gap (45). The barrier (69, 87, 99) prevents leakage of the liquid lubricant (75) from the dynamic groove bearing (9, 83, 95) at comparatively high rotation speeds of the dynamic groove bearing (9, 83, 95).
The dynamic groove bearing (9, 83, 95) can be used in an electric motor (1, 81, 93) of a data storage unit (113) in which an information disc (115), for example a hard disk of a computer, can be rotated relative to a scanning unit (121) with a magnetic head (123) by the electric motor (1, 81, 93).

REFERENCES:
patent: 5246294 (1993-09-01), Pan
patent: 5427456 (1995-06-01), Henzel
patent: 5558443 (1996-09-01), Zang
patent: 5558445 (1996-09-01), Chen et al.

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