Double wall bearing cone
AssigneeGeneral Electric Company
InventorsMartel A. McCallum, Jon A. Ebacher
Life of this patent
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Abstract
A double wall bearing cone closes an opening between a bearing housing and an exhaust frame in a gas turbine. The bearing cone includes a conical forward plate having an inner diameter and an outer diameter and a conical aft plate nested with and spaced from the conical forward plate. A hub connects the inner diameters of the forward plate and the aft plate. The hub preferably includes holes therein that serve to meter air flow between the forward plate and the aft plate. The double wall bearing cone defines a cooling circuit that reduces wear between a third stage turbine wheel in a gas turbine and the rotor aft shaft.
Claims13
A bearing cone that closes an opening between a bearing housing and an exhaust frame in a gas turbine, the bearing cone comprising:
- a conical forward plate having an inner diameter and an outer diameter;
- a conical aft plate nested with and spaced from the conical forward plate and having an inner diameter and an outer diameter;
- and
- a hub connecting the inner diameters of the forward plate and the aft plate.
An exhaust frame cooling circuit in a bearing housing of a gas turbine, the cooling circuit being defined by cooling air flow through a bearing cone including a conical forward plate having an inner diameter and an outer diameter, a conical aft plate nested with and spaced from the conical forward plate and having an inner diameter and an outer diameter, and a hub connecting the inner diameters of the forward plate and the aft plate, wherein the cooling circuit comprises an air flow path between the forward plate and the aft plate of the bearing cone.
A gas turbine comprising:
- a bearing housing supporting a turbine wheel;
- an exhaust frame receiving hot combustion gas and including a cooling circuit;
- and
- a bearing cone disposed in an opening between the bearing housing and the exhaust frame, the bearing cone including a conical forward plate having an inner diameter and an outer diameter, a conical aft plate nested with and spaced from the conical forward plate and having an inner diameter and an outer diameter, and a hub connecting the inner diameters of the forward plate and the aft plate.
Dependencies are inferred from the claim text.