Hydrostatically supported foil bearing

Details Hydrostatically supported foil bearing Hydrostatically supported foil bearing

1997-11-12

1999-03-23

Footland, Lenard A.

Bearings

Rotary bearing

Hydraulic or pneumatic bearing support

384103, F16C 1703

Patent

active

058850040

ABSTRACT:
A foil bearing is used wherein the support for the foils are hydrostatically rather than mechanical spring supported. The bearing housing has a plurality of orifices for admitting hydrostatic fluid over the foils. The foils are then supported by the hydrostatic fluid. The hydrostatic foil bearing is stiffer, longer lasting, and easier to assemble than foil bearings with mechanical spring backings. Hydrostatically supported foil bearings also have variable spring rates depending on the pressure of the hydrostatic fluid, thus allowing the hydrostatic foil bearing to have adjustable capacity with speed. In addition the hydrostatic foil bearing damping between the rotor and housing is greater than foil bearings with mechanical spring backing.

REFERENCES:
patent: 3765732 (1973-10-01), Watt
patent: 5518320 (1996-05-01), Mohammed et al.
patent: 5531522 (1996-07-01), Ide et al.

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