Bearing anomaly detection and location

• US 20060265153A1
• Filed: 11/01/2005
• Published: 11/23/2006
• Est. Priority Date: 01/10/2003
• Status: Active Grant

• Current Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Original Assignee: Oxford Biosignals (Us) Incorporated
• Inventors: Anuzis, Paul, King, Stephen Peter, Astley, Kenneth Richard, King, Dennis Maxwell
• Granted Patent: US 7,191,073 B2
• Time in Patent Office: Days
• US Class Current: 702/56
• CPC Class Codes: G01M 13/045 Acoustic or vibration analysis
• CPC Class Codes: G01N 2291/2696 Wheels, Gears, Bearings

Abstract

Novel tracked orders (i.e., tracked orders that are not present in “healthy” machinery) are useful for locating bearing anomalies. Accordingly, a method for locating bearing anomalies in machinery is provided that includes receiving vibration measurements acquired from the machinery, analyzing the vibration measurements to identify novel tracked orders indicative of bearing anomalies, and ascertaining the location of a bearing anomaly by relating a novel tracked order thus-identified to one or more further tracked orders. Thus, the novel tracked order does not merely indicate the occurrence of a bearing anomaly, but, in combination with the one or more further tracked orders, allows the bearing anomaly to be traced to a particular position.

Claims

1. (canceled)

2. A method for locating bearing anomalies in machinery, which comprises:

receiving vibration measurements acquired from the machinery,

analyzing the vibration measurements to identify novel tracked orders indicative of bearing anomalies, and

ascertaining a location of a bearing anomaly based on a spacing between a novel tracked order thus-identified and at least one side-band to the novel tracked order, said spacing being a multiple of a frequency of a component supported by an anomalous bearing.

4. A method according to claim 2, wherein the machinery comprises a gas turbine engine.

3. A method for locating bearing anomalies in machinery, which comprises:

receiving vibration measurements acquired from the machinery,

analyzing the vibration measurements to identify novel tracked orders indicative of bearing anomalies, and

ascertaining a location of a bearing anomaly from a value of a constant ratio between a frequency of a novel tracked order thus-identified and a frequency of a tracked order associated with a component supported by an anomalous bearing.

7. A method according to claim 3, wherein the machinery comprises a gas turbine engine.

5. A data processing system for locating bearing anomalies in machinery, comprising:

a data receiver for receiving vibration measurements acquired from the machinery, and

a processor for (a) analyzing the vibration measurements to identify novel tracked orders indicative of bearing anomalies, and (b) ascertaining a location of a bearing anomaly based on a spacing between a novel tracked order thus-identified and at least one side-band to the novel tracked order, said spacing being a multiple of a frequency of a component supported by an anomalous bearing.

6. A data processing system for locating bearing anomalies in machinery, comprising:

a data receiver for receiving vibration measurements acquired from the machinery, and

a processor for (a) analyzing the vibration measurements to identify novel tracked orders indicative of bearing anomalies, and (b) ascertaining a location of a bearing anomaly from a value of a constant ratio between a frequency of a novel tracked order thus-identified and a frequency of a tracked order associated with a component supported by an anomalous bearing.