DETECTING ROTOR ANOMALIES

• US 20130167649A1
• Filed: 01/04/2012
• Published: 07/04/2013
• Est. Priority Date: 01/04/2012
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Heda, Sanjeev Shyam, Iasillo, Robert Joseph, Pool, Eric Thomas, Wood, Scott Alan, Sahadevan, Nirmal
• Granted Patent: US 8,720,275 B2
• Time in Patent Office: Days
• US Class Current: 73/660
• CPC Class Codes: G01H 1/006 of the rotor of turbo machines

Abstract

An approach for detecting rotor anomalies is disclosed. An on-site monitoring unit monitors vibration measurements obtained from a rotor during a transient speed operation. In one aspect, the on-site monitoring unit classifies the vibration measurements into predetermined ranges of rotor speed during the transient speed operation, determines maximum vibration data for each of the predetermined ranges of rotor speed during the transient speed operation and compiles the maximum vibration data into a snapshot of the vibration measurements obtained during the transient speed operation. A remote monitoring unit detects a rotor anomaly from the snapshot of vibration measurements generated by the on-site monitoring unit.

Claims

1. A system, comprising:

at least one vibration sensor that obtains vibration measurements from a rotor during a transient speed operation;

an on-site monitoring unit, local to the at least one vibration sensor and the rotor, that monitors the vibration measurements during the transient speed operation, the on-site monitoring unit classifying the vibration measurements into one of a plurality of predetermined ranges of rotor speed during the transient speed operation, determining maximum vibration data for each of the plurality of predetermined ranges of rotor speed during the transient speed operation, and compiling the maximum vibration data into a snapshot of the vibration measurements obtained during the transient speed operation after the rotor completes the transient speed operation; and

a remote monitoring unit, remote from the at least one vibration sensor, the rotor and the on-site monitoring unit, that detects a rotor anomaly from the snapshot of vibration measurements generated by the on-site monitoring unit.

2. The system according to claim 1, wherein the on-site monitoring unit performs data quality checks on the vibration measurements to determine if the at least one vibration sensor is operating properly.

3. The system according to claim 1, wherein the on-site monitoring unit transmits the snapshot of the vibration measurements to the remote monitoring unit in a form that comprises one of time-series data and trigger event-based data.

4. The system according to claim 3, wherein the remote monitoring unit comprises a transactional database to store the trigger event-based data.

5. The system according to claim 1, wherein the remote monitoring unit analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation is indicative of a potential rotor anomaly.

6. The system according to claim 5, wherein the remote monitoring unit analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation is exhibiting non-repeatable behavior from a base level, the remote monitoring unit generating an escalation alarm indicating the presence of a potential rotor anomaly in response to determining that the vibration measurements are exhibiting non-repeatable behavior.

7. The system according to claim 5, wherein the remote monitoring unit analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation exceeds a predetermined threshold, the remote monitoring unit generating an escalation alarm indicating the presence of a potential rotor anomaly in response to determining that the vibration measurements exceeded the predetermined threshold.

8. The system according to claim 5, wherein the remote monitoring unit performs a confirmatory rotor anomaly analytic in response to determining the presence of a potential rotor anomaly.

9. The system according to claim 8, wherein the confirmatory rotor anomaly analytic comprises comparing the snapshot of the vibration measurements obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor.

10. The system according to claim 9, wherein the confirmatory rotor anomaly analytic determines the detection of a rotor anomaly in response to determining that the snapshot of the vibration measurements is exhibiting non-repeatable behavior in comparison to the historical vibration measurement snapshots obtained from the predetermined number of previous transient speed operations.

11. The system according to claim 10, wherein the remote monitoring unit recommends a corrective action in response to determining the detection of a rotor anomaly.

12. The system according to claim 5, wherein the remote monitoring unit compares the snapshot of the vibration measurements obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor.

13. The system according to claim 12, wherein the remote monitoring unit determines the detection of a rotor anomaly in response to determining that the snapshot of the vibration measurements is exhibiting non-repeatable behavior in comparison to the historical vibration measurement snapshots obtained from the predetermined number of previous transient speed operations.

14. The system according to claim 13, wherein the remote monitoring unit recommends a corrective action in response to determining the detection of a rotor anomaly.

15. A system for detecting rotor anomalies in real-time, comprising:

a rotor;

one or more operational sensors located about the rotor to measure operational data during a transient speed operation of the rotor, the operational data including rotor speed;

at least one vibration sensor that obtains vibration measurements from the rotor during the transient speed operation; and

a monitoring unit that detects a rotor anomaly based on the vibration measurements and the operational data obtained during the transient speed operation, wherein the monitoring unit classifies the vibration measurements into one of a plurality of predetermined ranges of rotor speed during the transient speed operation, determines maximum vibration data for each of the plurality of predetermined ranges of rotor speed during the transient speed operation, compiles the maximum vibration data into a snapshot of the vibration measurements obtained during the transient speed operation after the rotor completes the transient speed operation, and analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation is indicative of a potential a rotor anomaly.

16. The system according to claim 15, wherein the monitoring unit analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation is exhibiting non-repeatable behavior from a base level, the monitoring unit generating an escalation alarm indicating the presence of a potential rotor anomaly in response to determining that the vibration measurements are exhibiting non-repeatable behavior.

17. The system according to claim 15, wherein the monitoring unit analyzes the snapshot of the vibration measurements to determine if the vibration measurements obtained during the transient speed operation exceeds a predetermined threshold, the monitoring unit generating an escalation alarm indicating the presence of a potential rotor anomaly in response to determining that the vibration measurements exceeded the predetermined threshold.

18. The system according to claim 15, wherein the monitoring unit performs a confirmatory rotor anomaly analytic in response to determining detection of the potential rotor anomaly, the confirmatory rotor anomaly analytic comprises comparing the snapshot of the vibration measurements obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor, the confirmatory rotor anomaly analytic indicating detection of a rotor anomaly in response to determining that the snapshot of the vibration measurements is exhibiting non-repeatable behavior in comparison to the historical vibration measurement snapshots obtained from the predetermined number of previous transient speed operations.

19. The system according to claim 15, wherein the monitoring unit compares the snapshot of the vibration measurements obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor, the monitoring unit indicating detection of a rotor anomaly in response to determining that the snapshot of the vibration measurements is exhibiting non-repeatable behavior in comparison to the historical vibration measurement snapshots obtained from the predetermined number of previous transient speed operations.

20. A computer-readable storage device storing computer instructions, which when executed, enables a computer system to perform a method for detecting rotor anomalies, the method comprising:

receiving vibration data obtained from a rotor during a transient speed operation;

classifying the vibration data into one of a plurality of predetermined ranges of rotor speed during the transient speed operation;

determining maximum vibration data for each of the plurality of predetermined ranges of rotor speed during the transient speed operation;

in response to the rotor completing the transient speed operation, compiling the maximum vibration data into a snapshot of the vibration data obtained during the transient speed operation; and

analyzing the snapshot of the vibration data to determine if the vibration measurements obtained during the transient speed operation is indicative of a rotor anomaly, the analyzing comprises performing one of ascertaining whether the snapshot of the vibration data is indicative of a potential detection of a rotor anomaly and comparing the snapshot of the vibration data obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor in response to determining the potential detection of a rotor anomaly, and comparing the snapshot of the vibration data obtained during the transient speed operation to historical vibration measurement snapshots obtained from a predetermined number of previous transient speed operations performed by the rotor and determining whether the snapshot of the vibration measurements is exhibiting non-repeatable behavior in comparison to the historical vibration measurement snapshots obtained from the predetermined number of previous transient speed operations.