WO1999020992A3 - Detecting anomalies in rotating components - Google Patents
Detecting anomalies in rotating components Download PDFInfo
- Publication number
- WO1999020992A3 WO1999020992A3 PCT/US1998/022129 US9822129W WO9920992A3 WO 1999020992 A3 WO1999020992 A3 WO 1999020992A3 US 9822129 W US9822129 W US 9822129W WO 9920992 A3 WO9920992 A3 WO 9920992A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vibration
- signal
- synchronous
- rotor
- anomaly
- Prior art date
Links
- 230000001360 synchronised effect Effects 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
Abstract
A method for detecting an anomaly, such as a crack, in a rotor includes measuring the rotational speed and vibration of the rotor. A vibration signal synchronous with the frequency of rotation is filtered from the vibration measurement. A background vibration vector is then subtracted from the synchronous vibration signal to produce a vibration difference signal. The phase and amplitude of the vibration difference signal are measured and evaluated to determine whether an anomaly has developed. An apparatus for performing this method includes vibration and speed sensors coupled to a filter for extracting a signal from the vibration measurement having a frequency synchronous with the rotation of the rotor. A processor is coupled to the filter and the speed sensor and is programmed to perform the processing steps, described above.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/953,259 | 1997-10-17 | ||
US08/953,259 US6098022A (en) | 1997-10-17 | 1997-10-17 | Detecting anomalies in rotating components |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999020992A2 WO1999020992A2 (en) | 1999-04-29 |
WO1999020992A3 true WO1999020992A3 (en) | 1999-06-24 |
Family
ID=25493757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/022129 WO1999020992A2 (en) | 1997-10-17 | 1998-10-19 | Detecting anomalies in rotating components |
Country Status (2)
Country | Link |
---|---|
US (2) | US6098022A (en) |
WO (1) | WO1999020992A2 (en) |
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DE4406723A1 (en) * | 1993-02-27 | 1994-09-01 | Boetius & Partner Informations | Method for monitoring the operational state of a machine or installation |
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-
1997
- 1997-10-17 US US08/953,259 patent/US6098022A/en not_active Expired - Lifetime
-
1998
- 1998-10-19 WO PCT/US1998/022129 patent/WO1999020992A2/en active Application Filing
-
2000
- 2000-07-05 US US09/609,778 patent/US6456945B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4488240A (en) * | 1982-02-01 | 1984-12-11 | Becton, Dickinson And Company | Vibration monitoring system for aircraft engines |
US4751657A (en) * | 1985-07-08 | 1988-06-14 | General Electric Company | Method and apparatus for detecting axial cracks in rotors for rotating machinery |
GB2248110A (en) * | 1990-09-19 | 1992-03-25 | Rolls Royce Plc | Vibration analysis system for a multi-shaft turbine |
DE4032299A1 (en) * | 1990-10-11 | 1992-04-16 | Siemens Ag | Monitoring rotatable component esp. rotor shaft - time-dependently measuring oscillatory path of component in radial direction and rotary position |
DE4406723A1 (en) * | 1993-02-27 | 1994-09-01 | Boetius & Partner Informations | Method for monitoring the operational state of a machine or installation |
Also Published As
Publication number | Publication date |
---|---|
US6456945B1 (en) | 2002-09-24 |
WO1999020992A2 (en) | 1999-04-29 |
US6098022A (en) | 2000-08-01 |
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