Spindle assembly

Details Spindle assembly Spindle assembly

1990-07-18

1991-12-17

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384107, F16C 3206

Patent

active

050730371

ABSTRACT:
A spindle assembly having a spindle used as a rotary shaft or a machine tool or the like, at least one bearing sleeve for supporting the spindle as an externally pressurized gas bearing without touching it, a plurality of journal bearing clearances formed between the spindle and the bearing sleeve, and a housing accommodating the bearing sleeve. The bearing sleeve is formed with an annular groove for guiding compressed gas in a circumferential direction, at least three axially-extending gas supply grooves for directing the compressed gas through gas supply restrictor holes into the journal bearing clearances, and at least one axially-extending exhaust groove for discharging the compressed gas from said journal bearing clearances. The axial gas supply grooves and the exhaust groove have a plurality of gas supply restrictor holes and discharge holes, respectively.

REFERENCES:
patent: 3395952 (1968-08-01), Deffrenne
patent: 3454311 (1969-07-01), Tomita et al.
patent: 3726573 (1973-04-01), Unno

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