Turbo vibration high interlock
Thread Content
The vibration levels on the X and Y axes of the turbine are high; these values increased from 10 to 15 μm within three minutes, which triggered the interlock. All other monitoring parameters are normal. What is the most likely cause of this interlock? How to find the cause
Raise to 150μm, make some adjustments
There are mainly three reasons for a sudden increase in turbine shaft vibration: 1, the impeller may have come into contact with water； 2. Sudden imbalance occurs ； 3. Noise and rubbing occur. To determine the specific reason, it is necessary to analyze the vibration spectrum or examine the rising trend of shaft vibration and the response time.
1. The instrumentation team should check whether the vibration sensing probe is damaged, and determine whether 150um represents the full scale of the probe； 2. Is there any abnormal noise when the turbine is turned? ； 3. If it is at the coupling end, consider whether there is a fault with the coupling.
Vibration transmits the MV signal, right? It can be measured