The turbine shaft vibrates excessively, causing shutdown
Thread Content
Please analyze the reasons for the cascade shutdown caused by excessive vibration of the turbine shaft.
It could be a real vibration issue, or it might be a problem with the instruments. During the test run, the gauge probe caused an excessive chain stop
By observing the curve of the trip point, it can be determined whether there is an immediate rise or a gradual increase. At the same time, it is necessary to check whether the vibration probe also shows corresponding changes. If other parameters change in sync and follow the same trend, then vibration is likely to be real; otherwise, if only one probe exhibits abnormal behavior leading to a trip, it may be due to a false interlock, and it is necessary to check whether the probe is damaged.
As you said, if the vibration probes in the vicinity all show an upward trend at the same time, it indicates that the vibration level is indeed too high. There are many possible reasons if we only rely on speculation; changes in rotational speed, variations in the temperature and moisture content of the medium, and salt formation are all potential causes. It would be better to have curves along with explanations of the relevant parameters for investigation, so as to make a more accurate judgment.
The vibration level is so high that it triggers the interlocked shutdown.
Under what operating conditions does the equipment shut down abruptly?…
Under what operating conditions does the equipment shut down abruptly?…