Methods and systems for estimating residual useful life of a rolling element bearing
First Claim
1. A method for estimating residual useful life of a rolling element bearing in an operating gas turbine engine, the method comprising:
- receiving, by a processor, a vibration signal from a vibration sensor, the vibration signal including a vibratory response of the rolling element bearing;
detecting, by the processor, a vibratory pattern of the rolling element bearing from the vibration signal;
comparing, by the processor, the vibratory pattern to a reference vibratory pattern, the reference vibratory pattern having a plurality of successive failure propagation stages with respective vibratory specific patterns;
identifying, by the processor, a failure propagation stage of the plurality of successive failure propagation stages in which the vibratory pattern substantially matches a respective vibratory specific pattern of the failure propagation stage;
correlating, by the processor, the failure propagation stage to the residual useful life remaining in the rolling element bearing; and
generating, by the processor, an output signal representing the residual useful life remaining in the rolling element bearing.
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Abstract
Estimating residual useful life of a rolling element bearing in an operating gas turbine engine is provided. A processor receives a vibration signal from a vibration sensor. The vibration signal includes a vibratory response of the rolling element bearing. Processor detects a vibratory pattern of the rolling element bearing from the vibration signal and compares the vibratory pattern to a reference vibratory pattern. Processor identifies a failure propagation stage in which the vibratory pattern matches the reference vibratory pattern. Processor correlates the failure propagation stage to the residual useful life remaining in the rolling element bearing and generates an output signal representing the residual useful life remaining in the rolling element bearing.
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Citations
14 Claims
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1. A method for estimating residual useful life of a rolling element bearing in an operating gas turbine engine, the method comprising:
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receiving, by a processor, a vibration signal from a vibration sensor, the vibration signal including a vibratory response of the rolling element bearing; detecting, by the processor, a vibratory pattern of the rolling element bearing from the vibration signal; comparing, by the processor, the vibratory pattern to a reference vibratory pattern, the reference vibratory pattern having a plurality of successive failure propagation stages with respective vibratory specific patterns; identifying, by the processor, a failure propagation stage of the plurality of successive failure propagation stages in which the vibratory pattern substantially matches a respective vibratory specific pattern of the failure propagation stage; correlating, by the processor, the failure propagation stage to the residual useful life remaining in the rolling element bearing; and generating, by the processor, an output signal representing the residual useful life remaining in the rolling element bearing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for estimating residual useful life of a rolling element bearing of a rotor bearing system in an operating gas turbine engine, the method comprising:
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receiving by a processor, a vibration signal from a vibration sensor of the rotor bearing system, the vibration signal including a vibratory response associated with a vibratory pattern of the rolling element bearing; determining, by the processor, relative contributions of an impulse response and an imbalance response in the vibratory response, the relative contributions defining a vibratory pattern; comparing the vibratory pattern to a reference vibratory pattern in a failure propagation stage of a plurality of successive failure propagation stages with respective vibratory specific patterns; identifying a failure propagation stage of the plurality of successive failure propagation stages in which the vibratory pattern substantially matches a respective vibratory specific pattern of the failure propagation stage; and correlating, by the processor, the failure propagation stage to the residual useful life remaining in the rolling element bearing. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification