Hydrodynamic grooved bearing device

Details Hydrodynamic grooved bearing device Hydrodynamic grooved bearing device

1987-05-06

1990-10-02

Severin, David J.

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36013024, 384114, 384292, 384397, G11B 5008

Patent

active

049611224

ABSTRACT:
A hydrodynamic grooved bearing device in which a shaft is inserted into a hole formed in a bearing housing and one of the shaft and bearing housing is rotated, thereby the rotated member being supported includes a plurality of grooves formed on the shaft or an inner peripheral surface of the bearing housing for generating a dynamic pressure of fluid filled between the shaft and the bearing housing. The plurality of grooves are arranged side by side with a substantially certain pitch in a direction of rotation. Each of the grooves comprises a pair of groove portions slanted relative to the direction of rotation such that a distance between the pair of groove portions becomes narrower towards the direction of rotation and a connecting groove portion connecting the narrowest distance between the slanted groove portions. The connecting groove portion is extended in a direction substantially perpendicular to the direction of rotation. The provision of the dynamic pressure generating grooves enables a high bearing load and a stable bearing performance with a minimum degree of whirling compared with conventional V-grooved bearing.

REFERENCES:
patent: 1122565 (1914-12-01), Bache
patent: 3957317 (1975-05-01), Silver
patent: 4371216 (1983-02-01), Suzuki et al.
patent: 4706144 (1987-11-01), Asada et al.
Drescher, "Stepped-Clearance Plain Thrust Bearings," Konstruktion, vol. 9, 1965, pp. 341-349.
Bootsma, "Liquid-Lubricated Spira-Groove Bearings", Philips Research Reports, 1975, No. 7, pp. 89-91 and 102-104.

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