Bearing support system with controllable spring rate

Details Bearing support system with controllable spring rate Bearing support system with controllable spring rate

1986-01-17

1987-09-29

Footland, Lenard A.

Bearings

Rotary bearing

Plain bearing

384118, 384448, F16C 1702

Patent

active

046965858

ABSTRACT:
A control system for bypassing critical speeds in a high speed rotating turbine shaft supported by multiple journal bearings which includes pairs of apertures disposed in each bearing seat. The pairs of apertures are linked by fluid vent lines having valves disposed therein. The valves are responsive to vibration in the shaft and serve to vent lubricant between opposing apertures in order to vary the stiffness and hence the spring rate of the bearing as the shaft approaches critical speed.

REFERENCES:
patent: 2749190 (1956-06-01), Ball
patent: 3110527 (1963-11-01), Fox
patent: 3124395 (1964-03-01), Sternlicht
patent: 3290065 (1966-12-01), Porath
patent: 3350018 (1967-10-01), Harris et al.
patent: 3588202 (1971-06-01), Johnson
patent: 3804474 (1974-04-01), Ettles
patent: 4215903 (1980-08-01), Andrews

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