Method and apparatus for detecting rub in a turbomachine
First Claim
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1. A system for detecting a rub in a turbomachine comprising;
- a turbomachine comprising a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof;
sensors configured to monitor turbomachine conditions; and
an on site-monitor in communication with the sensors, wherein the on-site monitor is configured to analyze the turbomachine conditions to identify abnormal behavior indicative of a rub in at least near real time in the turbomachine between tip portions of the plurality of blades and corresponding seal portions of the turbomachine;
wherein the abnormal behavior comprises a high vibration amplitude relative to a baseline, or a high variation in vibration amplitude, or a sudden change in vibration amplitude, or a combination thereof.
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Abstract
An embodiment of the disclosed method and apparatus relates to a system for detecting a rub in a turbomachine. The system includes a turbomachine; sensors monitoring turbomachine conditions; and an on site monitor in communication with the sensors, and loaded with instructions to implement a method for detecting a rub in the turbomachine.
56 Citations
58 Claims
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1. A system for detecting a rub in a turbomachine comprising;
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a turbomachine comprising a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof; sensors configured to monitor turbomachine conditions; and an on site-monitor in communication with the sensors, wherein the on-site monitor is configured to analyze the turbomachine conditions to identify abnormal behavior indicative of a rub in at least near real time in the turbomachine between tip portions of the plurality of blades and corresponding seal portions of the turbomachine; wherein the abnormal behavior comprises a high vibration amplitude relative to a baseline, or a high variation in vibration amplitude, or a sudden change in vibration amplitude, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer implemented method for detecting a rub in a turbomachine, the method comprising:
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monitoring turbomachine conditions, wherein the turbomachine comprises a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof; determining whether a rub is occurring between tip portions of the plurality of blades and corresponding seal portions of the turbomachine based at least in part on a high variation in vibration amplitude, or a sudden change in vibration amplitude, or a combination thereof; and outputting an indication of the rub to a computer display. - View Dependent Claims (8, 9)
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10. A storage medium encoded with a machine-readable computer program code for detecting whether a rub is occurring in a turbomachine, the storage medium including instructions for causing a computer to implement a method comprising:
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obtaining data indicating turbomachine conditions, wherein the turbomachine comprises a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof; determining whether a rub is occurring between tip portions of the plurality of blades and corresponding seal portions of the turbomachine in at least near real time based at least in part on an abnormal vibration relative to a historical trend, wherein the abnormal vibration comprises a sudden change in vibration amplitude; and outputting an indication of the rub to a computer display. - View Dependent Claims (11, 12)
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13. A system, comprising:
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a turbomachine comprising a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof; means for monitoring turbomachine conditions; and means for detecting whether a rub is occurring in the turbomachine between tip portions of the plurality of blades and corresponding seal portions of the turbomachine in at least near real time based on an abnormal vibration value, an abnormal eccentricity value, an abnormal response to a transient condition, an abnormal response to a variation in load, an abnormal response to a variation in pressure, or an abnormal differential expansion of the stator and the rotor, or a combination thereof. - View Dependent Claims (14, 15)
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16. A system, comprising:
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a plurality of turbomachine sensors configured to couple to a turbomachine comprising a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof, wherein the plurality of turbomachine sensors is configured to sense operational parameters of the turbomachine; and a rub detection system configured to monitor the plurality of turbomachine sensors and to detect a turbomachine rub event occurring between tip portions of the plurality of blades and corresponding seal portions of the turbomachine based on one or more abnormal conditions, wherein the abnormal conditions comprise an abnormal vibration value, an abnormal eccentricity value, an abnormal response to a transient condition, an abnormal response to a variation in load, an abnormal response to a variation in pressure, and an abnormal differential expansion of the stator and the rotor. - View Dependent Claims (17, 18)
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19. A system, comprising:
a rub detection system configured to monitor operational parameters of a turbomachine comprising a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof, wherein the rub detection system is configured to detect a turbomachine rub event occurring between tip portions of the plurality of blades and corresponding seal portions of the turbomachine based on one or more abnormal conditions, wherein the abnormal conditions comprise a high vibration amplitude relative to a baseline, a high variation in vibration amplitude, and a sudden change in vibration amplitude. - View Dependent Claims (20, 21, 22, 23)
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24. A computer implemented method, comprising:
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analyzing turbomachine operational data to detect a rub event based on one or more abnormal conditions in the turbomachine, wherein the turbomachine comprises a rotor, a stator, and a plurality of blades extending radially from the rotor, or the stator, or a combination thereof, the rub event occurs between tip portions of the plurality of blades and corresponding seal portions of the turbomachine, and the one or more abnormal conditions comprise a high vibration amplitude, a high variation in vibration amplitude, a sudden change in vibration amplitude, an abnormal eccentricity value, an abnormal response to a transient condition, an abnormal response to a variation in load, an abnormal response to a variation in pressure, and an abnormal differential expansion of the stator and the rotor, and a combination thereof; and outputting an indication of the rub event to a computer display. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A system, comprising:
a turbomachine monitor configured to identify abnormal operational events as an indication of a rub in at least near real time between components of a turbomachine, wherein the abnormal operational events comprise an abnormal vibration value relative to a baseline. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A system, comprising:
a turbomachine monitor configured to identify abnormal operational events as an indication of a rub between components of a turbomachine, wherein the abnormal operational events comprise a sudden change in vibration relative to a first baseline, a large variance in vibration relative to a second baseline, or a large vibration amplitude relative to a third baseline, or a combination thereof. - View Dependent Claims (44, 45, 46, 47)
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48. A system, comprising:
a turbomachine monitor configured to monitor for abnormal operational events to identify a possible rub between components of a turbomachine in at least near real time, wherein the abnormal operational events comprise a sudden change relative to a first baseline, or a high variation relative to a second baseline, or a high value relative to a third baseline, or a combination thereof, of an operational parameter of the turbomachine, wherein the operational parameter comprises vibration amplitude. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
Specification