Hybrid squeeze film damper for active control of rotors

Details Hybrid squeeze film damper for active control of rotors Hybrid squeeze film damper for active control of rotors

1990-05-08

1991-10-22

Luong, Vinh T.

Machine element or mechanism

Elements

Flywheel, motion smoothing-type

74572, G05G 100

Patent

active

050584529

ABSTRACT:
A shaft rotating assembly typically used in gas turbine engines having a hybrid squeeze film damper for active control of rotors. The squeeze film damper includes seal ring means to confine the oil into a defined space. The seal ring means are axially moveable preferably by controller means to provide long damper and short damper protection within the same defined space. The squeeze film damper thus can operate as a long damper near critical speeds and it can also operate as a short damper at operating speeds.

REFERENCES:
patent: 4002086 (1977-01-01), Reinhall
patent: 4281563 (1981-08-01), Favrot
patent: 4295386 (1981-10-01), Zhivotov
patent: 4537177 (1985-08-01), Steere et al.
patent: 4625509 (1986-12-01), Sheppard
patent: 4781077 (1988-11-01), El-Sahfei
patent: 4905419 (1990-03-01), Makarov et al.
patent: 4905807 (1990-03-01), Rohs et al.
patent: 4928548 (1990-05-01), Lulay

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