WO1999020992A3 - Detecting anomalies in rotating components - Google Patents

Detecting anomalies in rotating components Download PDF

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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
Application number
PCT/US1998/022129
Other languages
French (fr)
Other versions
WO1999020992A2 (en
Inventor
H Eric Sonnichsen
Borislav Milatovic
Original Assignee
Test Devices Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Test Devices Inc filed Critical Test Devices Inc
Publication of WO1999020992A2 publication Critical patent/WO1999020992A2/en
Publication of WO1999020992A3 publication Critical patent/WO1999020992A3/en

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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.
PCT/US1998/022129 1997-10-17 1998-10-19 Detecting anomalies in rotating components WO1999020992A2 (en)

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

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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)

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US (2) US6098022A (en)
WO (1) WO1999020992A2 (en)

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Publication number Publication date
WO1999020992A2 (en) 1999-04-29
US6456945B1 (en) 2002-09-24
US6098022A (en) 2000-08-01

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