초록 ▼

A friction damper is mounted in series with a viscous damper to accommodate the normal magnitude vibration and the higher magnitude vibration occasioned from a larger imbalance of a jet engine rotor manifested by a bowed rotor and including a loading spring to allow the recentering of said friction

A friction damper is mounted in series with a viscous damper to accommodate the normal magnitude vibration and the higher magnitude vibration occasioned from a larger imbalance of a jet engine rotor manifested by a bowed rotor and including a loading spring to allow the recentering of said friction damper when the higher magnitude vibrations subside.

대표청구항 ▼

For a rotor rotatably supported by a bearing, first damping means having a fluid cavity and fluid therein surrounding said bearing and damping a first magnitude of vibrations, a second damping means having a plurality of axially juxtaposed circular plates surrounding said fluid cavity in a predeterm

For a rotor rotatably supported by a bearing, first damping means having a fluid cavity and fluid therein surrounding said bearing and damping a first magnitude of vibrations, a second damping means having a plurality of axially juxtaposed circular plates surrounding said fluid cavity in a predetermined centered position and being in friction relationship with each other, connection means serially interconnecting said first damping means and said second damping means including resilient means, said resilient means responding solely to a second magnitude of vibrations exceeding the first magnitude of vibrations for displacing alternate friction plates in a direction that is opposite and normal to each adjacent friction plate, and a loading spring for imposing a load axial to said plates and the load thereby being selected so that said resilient means restores said plates to their predetermined centered position.