Gas turbine drive unit

Claim 1

A GAS TURBINE DRIVE UNIT COMPRISING COMPRESSOR MEANS, COMBUSTION CHAMBER MEANS, TURBINE MEANS INCLUDING COMPRESSOR-DRIVE-TURBINE MEANS FOR DRIVING SAID COMPRESSOR MEANS AND OUTPUT TURBINE MEANS MECHANICALLY SEPARATE FROM SAID FIRT-MENTIONED COMPRESSOR-DRIVE-TURBINE MEANS, SAID OUTPUT TURBINE MEANS INCLUDING MECHANICAL OUTPUT MEANS, SAID TURBINE MEANS COMPRISING BLADE MEANS AND WALL MEANS, SAID WALL MEANS COMPRISING A PORTION IMMEDIATELY ADJACENT THE PERIPHERIES OF SAID BLADE MEANS, MEANS EFFECTIVELY ESTABLISHING A RELATIONSHIP BETWEEN THE AXIS LENGTH OF SAID COMPRESSOR MEANS AND SAID TURBINE MEANS AND THE LARGEST DIAMETRICAL DISTANCE BETWEEN THE PERIPHERIES OF ANY DIAMETRICALLY DISPOSED PAIR OF BLADES OF SAID BLADE MEANS, IN WHICH RELATIONSHIP SAID AXIAL LENGTH IS LESS THAN SAID LARGEST DIAMETRICAL DISTANCE, SAID ESTABLISHING MEANS COMPRISING AN ARRANGEMENT OF SAID COMPRESSOR MEANS AND SAID TURBINE MEANS IN WHICH SAID COMPRESSOR MEANS AND SAID TURBINE MEANS ARE CONCENTRICALLY DISPOSED IN NESTED RELATIONSHIP, SAID ESTABLISHING MEANS FURTHER COMPRISING A PLUTALITY OF SUPERSONIC STAGES PROVIDED IN SAID COMPRESSOR MEANS, MEANS OPERATIVELY CONNECTING SAID COMPRESSOR MEANS AND TURBINE MEANS WITH EACH OTHER, SAID COMPRESSOR MEANS AND TURBINE MEANS BEING SO ARRANGED THAT THE COMBUSTION AIR INTENDED FOR SAID COMPRESSOR MEANS, SAID COMBUSTION CHAMBER MEANS AND SAID TURBINE MEANS FLOW THROUGH THE COMPRESSOR MEANS IN ONE DIRECTION WHEREAS THE COMBUSTION GASES LEAVING SAID COMBUSTION CHAMBER MEANS FLOW THROUGH SAID TURBINE MEANS IN THE OPPOSITE DIRECTION, SAID OUTPUT TURBINE MEANS BEING LOCATED ON THE LOW PRESSURE SIDE OF THE UNIT, AND FURTHER COMPRISING MEANS FOR PRODUCING A COOLING EFFECT FOR THE BASE PORTIONS OF THE INDIVIDUAL TURBINE STAGES BY SUPPLYING COMPRESSED AIR FROM A HIGHER PRESSURE COMPRESSOR STAGE TO THE CONNECTING MEANS TO A RELATIVELY LOWER PRESSURE STAGE.