Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2005-10-18
2010-06-29
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S593000, C073S602000
Reexamination Certificate
active
07743658
ABSTRACT:
The invention relates to a method and a device for identifying a damaged bearing (4a, 4b) of a rotating shaft (1). According to the invention: the rotational speed (n) of the shaft (1) is determined; the alternating component (nAC) of the rotational speed (n) is determined, together with a smooth curve (h) of said alternating component (nAC) of the rotational speed (n); the smooth curve (h) is converted into the frequency range and a frequency response (B) of the value of the smooth curve (h) is determined. Said frequency response (B) of the value of the curve is monitored for the passing of a threshold value (G1, G2, G3, G4) and if said threshold value (G1, G2, G3, G4) is exceeded, a damaged bearing (4a, 4b) is identified. The invention thus provides a method and a device for identifying a damaged bearing (4a, 4b) of a rotating shaft (1) of a motor, which do not require a vibration sensor (11) to identify a damaged bearing (4a, 4b) of said shaft (1).
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Geropp B: “Hüllkurvenanalyse—Verfahren zur Schadensfrüherkennung”; Jan. 1999, Antriebstechnik, Vereinigte Fachverlage, Mainz, DE, pp. 51-55; XP000800697; ISSN: 0722-8546; Selte 52, rechte Spalte, Absatz 4; Seite 53, linke Spalte, Absatz 4.2.
Day Ursula B.
Fayyaz Nashmiya S
Feiereisen Henry M.
Siemens Aktiengesellschaft
Williams Hezron
LandOfFree
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