Apparatus and method for determining gas turbine engine life
First Claim
1. An apparatus for determining the equivalent life of a gas turbine engine having a source of electrical energy, and a starting motor;
- comprising;
means for sensing a temperature of said gas turbine engine and responsively delivering a first signal;
means for sensing starting motor drop out and delivering a responsive second signal;
means for recording a value related to the equivalent life of the gas turbine engine, andmeans for receiving said first and second signals and changing the recorded equivalent life value a predetermined amount in response to receiving said second signal and in response to the sensed temperature being greater than a predetermined value, said receiving means being connected to said life recording, temperature sensing, and starting motor drop out sensing means.
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Abstract
An apparatus and method is provided for determining and recording the life and run values of a gas turbine engine. A starter drop out sensor and a turbine inlet temperature sensor delivers a respective drop out and turbine temperature signal. A receiving device receives the signals and advances the life recorder a predetermined amount based on a linear failure prediction curve for each completed turbine engine start in response to the turbine inlet temperature being greater than a set point value and the starter drop out signal being received. The receiving means also delivers a signal to enable advancement of the run recorder in response to the sensed turbine inlet temperature exceeding the set point value. A generating device delivers a signal to advance the life recorder an amount for the sensed turbine temperature based on a turbine life curve having turbine temperature to voltage coordinates.
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Citations
20 Claims
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1. An apparatus for determining the equivalent life of a gas turbine engine having a source of electrical energy, and a starting motor;
- comprising;
means for sensing a temperature of said gas turbine engine and responsively delivering a first signal; means for sensing starting motor drop out and delivering a responsive second signal; means for recording a value related to the equivalent life of the gas turbine engine, and means for receiving said first and second signals and changing the recorded equivalent life value a predetermined amount in response to receiving said second signal and in response to the sensed temperature being greater than a predetermined value, said receiving means being connected to said life recording, temperature sensing, and starting motor drop out sensing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- comprising;
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17. A method for determining the equivalent life of a gas turbine engine having a turbine inlet, comprising the steps of:
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sensing the inlet temperature of the turbine; calculating an equivalent life curve as a function of turbine inlet temperature; and advancing a life recorder a predetermined amount based on said equivalent life curve and the sensed turbine inlet temperature; comparing the sensed turbine inlet temperature with a predetermined temperature; sensing a dropping out of a turbine engine starting motor; and advancing the life recorder a predetermined amount in response to said starter dropping out and said sensed turbine inlet temperature being greater than said predetermined temperature. - View Dependent Claims (18, 19, 20)
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Specification