Siemens Aktiengesellschaft

Karl-Heinz Filbry

Rainer Eckert

Markus Platen

Ulrich Höhn

The invention relates to a method and a device for identifying a damaged bearing () of a rotating shaft (). According to the invention: the rotational speed (n) of the shaft () is determined; the alternating component (n) of the rotational speed (n) is determined, together with a smooth curve (h) of said alternating component (n) 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 (G, G, G, G) and if said threshold value (G, G, G, G) is exceeded, a damaged bearing () is identified. The invention thus provides a method and a device for identifying a damaged bearing () of a rotating shaft () of a motor, which do not require a vibration sensor () to identify a damaged bearing () of said shaft ().

Method and device for identifying a damaged bearing of a rotating shaft

An electric motor is equipped with an interface module, which is used to calculate the remaining service life of a bearing. The interface module can be integrated into the motor or can be fitted to the latter. The remaining service life of the bearing can be estimated from the signal of a rotary transducer and optionally a temperature sensor.

Growing community of inventors

Höchheim, Germany

Karl-Heinz Filbry