High temperature damper for a roller bearing
AssigneeFlorida Turbine Technologies, Inc.
InventorPhilip C Pelfrey
Life of this patent
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Abstract
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.
Claims13
A damper for a roller bearing, the roller bearing having an inner race and an outer race, and a roller element between the two races, the inner race being mounted on a rotor shaft and the outer race being held in a stator housing, and a damping chamber formed between the housing and the inner race and having a damping fluid therein to dampen the bearing, the improvement comprising:
- The damping fluid being a liquid metal that has a paste-like consistency at a room temperature and a liquid consistency at about 1500 degrees F.
A process for damping a roller bearing, the roller bearing having an outer race and an inner race with a roller member positioned between the two races, the process comprising the steps of:
- Forming a damping chamber between the stator housing and the outer race of the bearing;
- and,
- Filling the damping chamber with a liquid metal that has a consistency of a paste at room temperature and a consistency of a liquid at about 1,500 degrees F.
Dependencies are inferred from the claim text.