Compressor rotor cooling system for a gas turbine
First Claim
1. In a gas turbine including a compressor having a bore and a rotor comprised of multiple stages extending between a first stage at a forward end of the compressor and a last stage at an aft end of the compressor, each stage including a rotor disk having a peripheral rim and multiple blades secured to the peripheral rim, a combustion system comprising a plurality of combustors utilizing discharge air from the compressor for combustion, and multiple turbine stages driven by combustion gases from the combustion system, the improvement comprising means for supplying cooling air at least to a peripheral rim of the last stage of the compressor, wherein said cooling air comprises compressor discharge air extracted from the combustion system downstream of the compressor and upstream of the plurality of combustors, and further including a heat exchanger arranged to cool said cooling air after extraction from the combustion system.
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Accused Products
Abstract
In a gas turbine including a compressor having a bore and a rotor comprised of multiple stages extending between a first stage at a forward end of the compressor and a last stage at an aft end of the compressor, each stage including a rotor disk having a peripheral rim and multiple blades secured to the peripheral rim, a combustion system comprising a plurality of combustors utilizing discharge air from the compressor for combustion, and multiple turbine stages driven by combustion gases from the combustion system, the improvement comprising means for supplying cooling air at least to a peripheral rim of the last stage of the compressor.
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Citations
37 Claims
- 1. In a gas turbine including a compressor having a bore and a rotor comprised of multiple stages extending between a first stage at a forward end of the compressor and a last stage at an aft end of the compressor, each stage including a rotor disk having a peripheral rim and multiple blades secured to the peripheral rim, a combustion system comprising a plurality of combustors utilizing discharge air from the compressor for combustion, and multiple turbine stages driven by combustion gases from the combustion system, the improvement comprising means for supplying cooling air at least to a peripheral rim of the last stage of the compressor, wherein said cooling air comprises compressor discharge air extracted from the combustion system downstream of the compressor and upstream of the plurality of combustors, and further including a heat exchanger arranged to cool said cooling air after extraction from the combustion system.
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23. In a gas turbine comprising a compressor including a rotor and a plurality of bladed disks and associated rims extending from a forward end to an aft end of the compressor;
- a plurality of combustors, and a casing surrounding said combustors arranged to direct air from the compressor to the combustors; and
a turbine including multiple stages driven by combustion gases from the plurality of combustors, and wherein cooling air is utilized to cool the compressor rotor, the improvement comprising;at least one extraction port in said casing and associated piping for supplying compressor discharge air as cooling air to at least some of said plurality of bladed disks and associated rims at the aft end of the compressor. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
- a plurality of combustors, and a casing surrounding said combustors arranged to direct air from the compressor to the combustors; and
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32. In a land-based gas turbine comprising a compressor including a rotor and a plurality of bladed disks and associated rims extending from a forward end to an aft end of the compressor;
- a plurality of combustors surrounded by a casing arranged to receive combustion air from the compressor; and
a turbine including multiple stages driven by combustion gases from the plurality of combustors and wherein cooling air is utilized to cool the compressor rotor, a method of maintaining at least the last of said disks and its associated rim at a predetermined temperature comprising the steps of;a) extracting cooling air from said casing; b) introducing said cooling air into said compressor in a direction counter to a flow direction of the combustion air; and c) cooling said last disk and its associated rim to a predetermined temperature. - View Dependent Claims (33, 34, 35, 36, 37)
- a plurality of combustors surrounded by a casing arranged to receive combustion air from the compressor; and
Specification