A high temperature damper for a roller bearing having a long shelf life
and capable of withstanding temperatures in a gas turbine engine shaft.
The damper includes a damping chamber formed between a stator housing and
the outer race of the bearing, and is filled with a liquid metal such as
Gallium that has a paste-like consistency at room temperature so as not
to flow and leak from the damping chamber, and a liquid-like consistency
at about 1,500 degrees F. in order to withstand the extreme temperatures
of a gas turbine engine. Seals having a U-shape cross section are made of
a high temperature metal like Hastalloy or Hynes and enclose the liquid
metal within the damping chamber.