Rotor Shaft Cooling
First Claim
1. A casing for a gas turbine, the gas turbine extending between an inlet section and an exhaust section and defining a downstream direction from the inlet section to the exhaust section, the casing comprising:
- a forward end;
an aft end downstream of the forward end;
a first exterior surface facing radially outward;
a second exterior surface opposing the first exterior surface, the second exterior surface facing radially inward;
an internal body at least partially defined between the first exterior surface and the second exterior surface; and
a heat exchange system comprising an inlet formed in one of the first exterior surface and the second exterior surface proximate the aft end of the casing, an outlet formed in one of the first exterior surface and the second exterior surface proximate the aft end of the inner casing, a supply bore extending upstream from the inlet through the interior body of the casing, and a return bore extending downstream to the outlet through the interior body of the casing.
2 Assignments
0 Petitions
Accused Products
Abstract
A gas turbine casing with an internal heat exchange system. The gas turbine extends between an inlet section and an exhaust section and defines a downstream direction from the inlet section to the exhaust section. The casing includes a forward end, an aft end downstream of the forward end, a first exterior surface facing radially outward, a second exterior surface facing radially inward, and an internal body at least partially defined between the first exterior surface and the second exterior surface. The heat exchange system includes an inlet and an outlet formed in an exterior surface of the casing proximate the aft end, a supply bore extending upstream from the inlet through the interior body of the casing, and a return bore extending downstream to the outlet through the interior body of the casing.
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Citations
20 Claims
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1. A casing for a gas turbine, the gas turbine extending between an inlet section and an exhaust section and defining a downstream direction from the inlet section to the exhaust section, the casing comprising:
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a forward end; an aft end downstream of the forward end; a first exterior surface facing radially outward; a second exterior surface opposing the first exterior surface, the second exterior surface facing radially inward; an internal body at least partially defined between the first exterior surface and the second exterior surface; and a heat exchange system comprising an inlet formed in one of the first exterior surface and the second exterior surface proximate the aft end of the casing, an outlet formed in one of the first exterior surface and the second exterior surface proximate the aft end of the inner casing, a supply bore extending upstream from the inlet through the interior body of the casing, and a return bore extending downstream to the outlet through the interior body of the casing. - View Dependent Claims (2, 3, 4)
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5. A gas turbine extending between an inlet section and an exhaust section and defining a downstream direction from the inlet section to the exhaust section, the gas turbine further comprising:
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a compressor; a turbine section, the exhaust section downstream of the turbine section; a plurality of combustors disposed downstream from the compressor and upstream from the turbine; a rotor shaft extending between the turbine section and the compressor; a casing between the rotor shaft and the plurality of combustors; a high pressure packing seal between the rotor shaft and the inner casing; a heat exchange system defined in the casing, the heat exchange system comprising an inlet formed in the casing proximate an aft end of the casing, an outlet formed in the casing proximate the aft end of the casing, a supply conduit extending through the casing upstream from the inlet, and a return conduit extending through the casing downstream to the outlet; and a cooling fluid source in fluid communication with at least one of the inlet and the outlet; wherein the rotor shaft is in thermal communication with the heat exchange system of the casing. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method of cooling a rotor shaft of a gas turbine, the gas turbine further comprising a compressor, a turbine section, a plurality of combustors disposed downstream from the compressor and upstream from the turbine, the rotor shaft extending between the turbine and the compressor, a casing between the rotor shaft and the plurality of combustors and a high pressure packing seal disposed in a high pressure packing seal cavity between the rotor shaft and the casing, the method comprising:
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directing a supply stream of a cooling fluid within the casing in an upstream direction from an inlet proximate to an aft end of the casing; and directing a return stream of the cooling fluid within the casing in a downstream direction to an outlet proximate the aft end of the casing; whereby heat is transferred from the rotor shaft to the cooling fluid. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification