Text version of the page

Geislinger Monitoring

Coupling Monitoring

Monitors the synthesis of the vibratory twist angle between two rotating parts with a static offset, caused by torque. Based on the measured static twist, computing of the transmitted torque and power is possible. The two rotating parts are combined elastically. For this monitoring function two sensors are necessary. Both rotating parts must have a reference mark (a longer gap or tooth), which is used for recognizing the static offset. The torsional stiffness of the monitored part can be entered as a cubic polynom and is used for calculating torque and transmitted power.
Fig.16 Coupling Monitoring Coupling Monitoring is mainly used for: One sensor is mounted on the power input side, the other on the power output side of the coupling. Monitoring of the vibratory twist angle between coupling inner part and coupling outer part is necessary to control the coupling load. Dysfunctional oil supply or heavy wear of the Geislinger Coupling springs due to overload leads to an increased vibratory twist. This will activate an alarm in the Geislinger Monitoring System. A blocked coupling with no vibratory twist causes also an alarm, because other parts of the propulsion system are overloaded. Monitoring of the coupling is also very useful to determine the exact condition of the coupling before an engine overhaul or dry- docking. If the measurements show that the coupling is working properly, it can be justified in front the classification society that no coupling overhaul is necessary. In the rare case that spares parts are needed, they can be ordered in time.

Shaft Monitoring

Shaft monitoring is similar to coupling monitoring. The only difference is that the stiffness of the springs is substituted by the stiffness of the shaft. The accuracy of the measured torque increases with the distance between the sensors (= length of shaft) and the data quality of the shaft dimensions.
Geislinger GmbH, 5300 Hallwang, Austria Monitoring Catalog: Version 5.1 18 / 22