REVERSE ROTATION DETECTION IN ROTATING MACHINERY

• US 20160076394A1
• Filed: 09/11/2014
• Published: 03/17/2016
• Est. Priority Date: 09/11/2014
• Status: Active Grant

• Current Assignee: Baker Hughes Holdings LLC (Baker Hughes Company)
• Original Assignee: General Electric Company
• Inventors: Maalouf, Mel Gabriel, Qureshi, Munir Ahmed
• Granted Patent: US 10,465,551 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01D 21/003 Arrangements for testing or measuring for measuring vibrations G01H
• CPC Class Codes: F01K 13/02 Controlling, e.g. stopping or starting
• CPC Class Codes: F02D 2250/06 Reverse rotation of engine
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: G01H 1/006 of the rotor of turbo machines
• CPC Class Codes: G01P 13/04 Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
• CPC Class Codes: G05B 2219/42321 Wrong direction or sign of measured value, eventually stop
• CPC Class Codes: G05B 23/0235 based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
• CPC Class Codes: G05B 9/02 electric

Abstract

A system includes a sensor configured to monitor rotating machinery and generate a signal based on a physical characteristic of the rotating machinery. The system also includes a monitoring system with a processor. The processor of the monitoring system is configured to receive the signal from the sensor. The processor determines an occurrence of reverse rotation of the rotating machinery by comparing the signal to a normal operating pattern to generate an initial value. The processor generates a notification signal indicating the occurrence of a reverse rotation.

Claims

1. A device, comprising:

a communication interface configured to receive a signal related to a rotational speed, a vibration, or any combination thereof of a rotating machine element;

a memory for storing an operating pattern of the rotating machine element, wherein the operating pattern is related to the received signal; and

a processor coupled to the communication interface and the memory, wherein the processor is configured to;

determine an occurrence of reverse rotation of the rotating machine element by comparing the signal received from the communication interface to the operating pattern stored in the memory; and

generate an initial value indicative of the occurrence of the reverse rotation of the rotating machine element.

2. The device of claim 1, wherein the processor is configured to apply predetermined weighting values to the initial value to generate a combined value.

3. The device of claim 2, wherein the processor is configured to output a notification signal indicative of the occurrence of the reverse rotation of the rotating machine element based on the combined value.

4. The device of claim 3, comprising a display coupled to the processor, wherein the display is configured to display an indication of the occurrence of the reverse rotation of the rotating machine element based on the notification signal.

5. The device of claim 3, wherein the communication interface is configured to transmit a communication signal from the device, wherein the communication signal is based on the notification signal.

6. The device of claim 3, wherein the processor is configured to generate an indication of the operation of the rotating machine element as part of the notification signal.

7. The device of claim 1, wherein the memory is configured to store the operating pattern as related to a coast down time, a rate of speed increase or speed decrease, an operational speed, or any combination thereof of the rotating machine element.

8. A system, comprising:

a sensor configured to monitor rotating machinery and generate a signal based on a physical characteristic of the rotating machinery; and

a monitoring system comprising a processor configured to;

receive the signal;

determine an occurrence of reverse rotation of the rotating machinery by comparing the signal to an operating pattern of the rotating machinery to generate an initial value; and

generate a notification signal indicating the occurrence of a reverse rotation.

9. The system of claim 8, wherein the processor is configured to determine the occurrence of reverse rotation of the rotating machinery by applying predetermined weighting values to the initial value to generate a combined value.

10. The system of claim 9, wherein the processor is configured to determine the occurrence of reverse rotation of the rotating machinery by comparing the combined value to a preset threshold.

11. The system of claim 9, wherein the monitoring system is configured to generate the notification signal based on the combined value.

12. The system of claim 8, wherein the processor is configured to determine the occurrence of reverse rotation of the rotating machinery by comparing a phase relationship between the signal of the sensor and a second signal of a second sensor to an initial condition, wherein the initial condition comprises the signal leading the second signal, and wherein the occurrence of reverse rotation comprises the second signal leading the signal in phase.

13. The system of claim 8, wherein the sensor is configured to monitor a rotational speed or a vibration of the rotating machinery as the physical characteristic.

14. The system of claim 8, wherein the monitoring system is configured to receive an indication that rotating machinery is shutting down.

15. The system of claim 8, wherein the monitoring system is further configured to determine that the rotating machinery is shutting down based on the signal.

16. A non-transitory computer-readable medium having computer executable code stored thereon, the code comprising instructions to:

receive a signal from a sensor associated with rotating machinery;

determine an occurrence of reverse rotation of the rotating machinery based on the signal and an operating pattern of the rotating machinery; and

generate a notification signal indicating the occurrence of reverse rotation of the rotating machinery.

17. The code of claim 16, comprising instructions to determine the occurrence of reverse rotation by comparing the signal to the operating pattern to generate an initial value.

18. The code of claim 17, comprising instructions to determine the occurrence of reverse rotation by applying predetermined weighting values to the initial value to generate a combined value.

19. The code of claim 18, comprising instructions to generate the notification signal based on the combined value.

20. The code of claim 16, comprising instructions to generate an indication of the operation of the rotating machinery as part of the notification signal.