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US 10,883,424 B2Granted
Multi-spool gas turbine engine architecture
AssigneePratt & Whitney Canada Corp.
InventorGuy Lefebvre
Life of this patent
Estimating the term…
Abstract
A multi-spool gas turbine engine comprises a low pressure (LP) spool and a high pressure (HP) spool independently rotatable about a central axis. The LP pressure spool has an LP compressor and an LP turbine. The HP spool has an HP turbine and an HP compressor. An accessory gear box (AGB) is drivingly connected to the HP spool. The LP compressor is disposed axially between the HP compressor and the AGB. A gear train drivingly couples the LP compressor to the LP turbine. The gear train is integrated to the AGB.
Claims24
A reverse flow gas turbine engine comprising:
- a low pressure (LP) spool and a high pressure (HP) spool rotatable independently of one another about an engine axis;
- the LP spool comprising an LP turbine, an LP compressor and an LP shaft drivingly connected to the LP turbine;
- the HP spool comprising an HP turbine, an HP compressor and an HP shaft drivingly connecting the HP turbine to the HP compressor, the HP compressor in fluid communication with the LP compressor;
- an accessory gear box (AGB) drivingly connected to the HP spool, the AGB mounted axially in line with the engine axis, the LP compressor disposed axially between the HP compressor and the AGB, and
- a gear train drivingly coupling the LP shaft to the LP compressor via an LP compressor shaft projecting from a side of the LP compressor facing the AGB, the gear train disposed axially on the side of the LP compressor facing the AGB,
- wherein the HP shaft extends axially through the LP compressor shaft in driving engagement with the AGB.
3 more elements
A multi-spool gas turbine engine comprising:
- a low pressure (LP) spool;
- a high pressure (HP) spool, the LP spool and the HP spool rotatable independently of one another about a central axis, the LP pressure spool comprising an LP compressor, an LP turbine and an LP shaft extending axially from the LP turbine through a central bore of the LP compressor, the HP spool comprising an HP turbine, an HP compressor and an HP shaft drivingly connected to the HP turbine;
- an accessory gear box (AGB) drivingly connected to the HP spool, the AGB disposed on the engine so that the central axis extends through the AGB, the LP compressor disposed axially between the HP compressor and the AGB, and a gear train drivingly coupling the LP compressor to the LP turbine, the gear train disposed on an AGB facing side of the LP compressor, wherein the LP shaft is in driving engagement with the gear train, wherein the LP compressor has a hollow compressor shaft portion extending concentrically about the LP shaft, the hollow compressor shaft portion drivingly connected to the LP shaft by the gear train, wherein the HP shaft extends axially through the central bore of the LP compressor radially between the LP shaft and the hollow compressor shaft portion, the HP shaft being drivingly connected to the AGB.
Dependencies are inferred from the claim text.