Dual clearance squeeze film damper

Details Dual clearance squeeze film damper Dual clearance squeeze film damper

1984-04-05

1985-07-09

Footland, Lenard A.

Bearings

Rotary bearing

Hydraulic or pneumatic bearing support

384101, F16C 2700

Patent

active

045279101

ABSTRACT:
This invention relates to a dual clearance hydrodynamic liquid squeeze film damper for a gas turbine engine. Under normal operating conditions the device functions as a conventional squeeze film damper, using only one of its oil films. When an unbalance reaches abusive levels, as may occur with a blade loss or foreign object damage, a second, larger-clearance film becomes active, controlling vibration amplitudes in a near-optimum manner until the engine can be safely shut down and repaired.

REFERENCES:
patent: 2003316 (1935-06-01), Schein
patent: 3005668 (1961-10-01), Szydlowski
patent: 3212829 (1965-10-01), Gross
patent: 3332726 (1967-07-01), Cooper
patent: 3782793 (1974-01-01), Sinner
patent: 4084861 (1978-04-01), Greenberg et al.
patent: 4175803 (1979-11-01), Roberts
patent: 4214796 (1980-07-01), Monzel et al.
patent: 4336968 (1982-01-01), Hibner
patent: 4429923 (1984-02-01), White et al.
patent: 4457667 (1984-07-01), Seibert et al.

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