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US 8,943,876 B2Granted
Shaft break detection
AssigneeROLLS-ROYCE plc
InventorsArthur Laurence Rowe, Stephen Granville Garner, Marko Bacic
Life of this patent
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Abstract
A shaft break detection system and a method of detecting shaft break for a gas turbine engine. A first indication is calculated from measured rotational speed of a shaft. A second indication is calculated from the rotational speed. A shaft break signal is generated if both indications are true.
Claims19
A method of detecting shaft break for a gas turbine engine, comprising the steps of:
- measuring rotational speed of a shaft of a gas turbine engine;
- calculating a first indication from the rotational speed;
- calculating a second indication from the rotational speed, wherein each of the first indication and the second indication is a Boolean logic value;
- and
- producing a shaft break signal if the first indication is true and the second indication is true.
2 more elements
A shaft break detection system for a gas turbine engine, comprising:
- a measuring device to measure rotational speed of a shaft;
- a processor to calculate a first indication from the rotational speed;
- a processor to calculate a second indication from the rotational speed, wherein each of the first indication and the second indication is a Boolean logic value;
- and
- a shaft break signal generator to generate a shaft break signal if the first indication is true and the second indication is true.
2 more elements
Dependencies are inferred from the claim text.