Questions regarding turbine shaft displacement and shaft vibration
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I would like to ask the experts here in Kawanoe: what determines the alarm values and interlock values for shaft displacement and shaft vibration? There is no information provided by the manufacturer – are there any standards or references that can be consulted?
These initial setting values were all determined based on the random data mentioned on the 2nd floor
Of course, this depends on the manufacturer’s accompanying materials
Let’s discuss the thrust bearing. If the thrust clearance is 0.4 and the shaft is placed between the main and auxiliary thrust bearings, once the probe is installed, the shaft displacement shows as 0. What should the alarm value and interlock value be in this case? Is there any reference available?
It is necessary to follow the manufacturer’s design specifications
I wonder which factory designed and produced the steam turbines you use. For example, our factory is produced by SAIC; they provide our factory with the corresponding technical drawings, technical documents, and so on, which naturally includes the thrust bearings that the original poster mentioned. So let’s get those relevant materials first
As a supplementary discussion, if the alarm value is set at 0.4 and the thrust clearance is also 0.4, with the shaft displacement sensor mounted on the thrust disc at the middle position as the zero point, then does this mean that the thrust bearing has experienced 0.2 worth of wear by the time the alarm value is reached?