Emergency Shut-Down Detection System For A Gas Turbine
First Claim
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1. A gas turbine engine comprising:
- a compressor;
a combustor;
a turbine coupled to said compressor by a spool;
at least one electrical speed sensor disposed in said compressor upstream of the spool and operable to provide a compressor speed signal, said at least one speed sensor including an electrical continuity circuit operable to generate a continuity signal for the electrical speed sensor;
a controller having a number of inputs for receiving at least one measured engine parameter and a number of outputs for transmitting control signals for controlling engine operation variables, said controller including an input for receiving the speed signal and the continuity signal, said controller configured to generate a speed probe fault in response to a loss of the speed signal and a continuity fault signal in response to a loss of the continuity signal, said controller further configured to generate a signal to shut down engine operation in response to detection of both the speed probe fault signal and the continuity fault signal.
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Abstract
A gas turbine engine is provided with a controller configured to detect a spool shaft failure and to initiate an engine shut-down in response to the shaft failure. The controller evaluates the compressor speed probe, the speed probe continuity, P30 pressure and compressor surge to determine whether a shaft failure has occurred.
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Citations
11 Claims
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1. A gas turbine engine comprising:
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a compressor; a combustor; a turbine coupled to said compressor by a spool; at least one electrical speed sensor disposed in said compressor upstream of the spool and operable to provide a compressor speed signal, said at least one speed sensor including an electrical continuity circuit operable to generate a continuity signal for the electrical speed sensor; a controller having a number of inputs for receiving at least one measured engine parameter and a number of outputs for transmitting control signals for controlling engine operation variables, said controller including an input for receiving the speed signal and the continuity signal, said controller configured to generate a speed probe fault in response to a loss of the speed signal and a continuity fault signal in response to a loss of the continuity signal, said controller further configured to generate a signal to shut down engine operation in response to detection of both the speed probe fault signal and the continuity fault signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for shutting down a gas turbine engine comprising:
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detecting a fault in a signal from a compressor speed probe upstream of the spool connecting a compressor to a turbine; detecting a fault in a continuity signal for the compressor speed probe; and commanding an engine shut down in response to the detection of a fault in both the speed probe signal and the continuity signal. - View Dependent Claims (8, 9, 10, 11)
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Specification