Vibro-Consult AG
Case-Studies
Generator cracks
Initial situation
In a hydropower, cracks (spider) appeared on the generator rotor. This situation was critical and investigations had to be initiated immediately. As always in such cases, the cause had to be identified before any action could be taken.
It was necessary to determine the cause of these cracks by means of vibration and torsion measurements and to propose measures.
Procedure
Measuring points were defined and installed on the machine at all critical locations. Of course, this was done at the guide bearings so that any possible repercussions on the machine could be analyzed.
As with a basic VC measurement, all possible operating conditions were run after the measurement equipment was completed in order to obtain as good a picture as possible of all machine situations. The result was surprising.