Overthrust protection system
AssigneeROLLS-ROYCE plc
InventorsJoseph H Walker, John R W Whitmarsh, Stephen G Garner
Life of this patent
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Abstract
An overthrust protection system for a gas turbine in which fuel is supplied at a controlled flow rate to a combustor (4) of the gas turbine. The overthrust protection system uses a bypass valve (24) to divert fuel flow away from the combustor (4). The opening of this valve is controlled by an overthrust controller (28) to divert fuel flow in response to a detected overthrust condition of the gas turbine. Diverting some of the fuel flow in this manner brings about a reduction in the thrust, allowing the overthrust condition to be controlled without resorting to a complete shut down of the gas turbine.
Claims6
An overthrust protection system for a gas turbine in which fuel is supplied at a controlled flow rate to a combustor of the gas turbine, the overthrust protection system comprising:
- a bypass valve for diverting fuel flow away from the combustor;
- detection means for detecting an overthrust condition of the gas turbine;
- and
- overthrust control means for controlling the bypass valve to divert fuel flow in response to a detected overthrust condition, said overthrust control means controlling the operation of a fuel shut-off valve.
Dependencies are inferred from the claim text.