Method and arrangement for proving a gas turbine, and engine-braking therefore
AssigneeVolvo Aero Corporation
InventorsBertil JONSSON, Lars SUNDIN
Life of this patent
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Abstract
Method and arrangement for providing a gas turbine (1) having a first compressor (2), a combustion chamber (16) and a first turbine (11), the turbine being adapted to drive the compressor via a first shaft (10a, 10b). The gas turbine also has a bleed valve (12) arranged upstream of the first turbine for conducting part of a gas compressed by the compressor past it during engine braking. The invention also relates to a method for engine-braking a gas turbine.
Claims25
A gas turbine (1, 101, 201) comprising a first compressor (2), a combustion chamber (16) and a first turbine (11), the turbine being adapted to drive the compressor via a first shaft (10a, 10b), wherein the gas turbine comprises a bleed valve (12) arranged upstream of the first turbine for conducting part of a gas compressed by the compressor past the turbine during engine-braking wherein the bleed valve (12) is adapted in such a way that its opening area for regulating the quantity of gas which is intended to be conducted past the first turbine (11) is controlled depending on the pressure in the gas from the compressor (2).
The gas turbine as claimed in claim 9, wherein the bleed valve (12) is arranged upstream of the heat exchanger (14).
A method for engine-braking a gas turbine (1, 101, 201) comprising a first compressor (2), a combustion chamber (16) and a first turbine (11), the turbine being adapted to drive the compressor via a first shaft (10a, 10b), wherein part of the gas compressed by the compressor (2) is conducted past the first turbine (11) during engine-braking, wherein the quantity of gas which is conducted past the first turbine (11) is controlled depending on the pressure in the gas from the compressor (2).
The method as claimed in claim 20, wherein the coupling together of the shafts (10a, 10b, 21) takes place after detected actuation of a brake control.
Dependencies are inferred from the claim text.