Hybrid squeeze film damper for active control of rotors

摘要

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.