Ask a master about axis displacement
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As shown in the figure above,* About half a month ago, the values of A3161 and 3162 were about 0.03 and 0.02. Now the values are 0.006 and -0.003. Although the upper limit is ±0.15, it has no effect. I want to ask all the steam turbine experts what are the reasons for this situation. I am a novice.
It may be caused by changes in load size
There is no change in compliance. It has always been 7800 rpm and 470,000 cycles.
There may also be a problem with the shaft displacement probe. Some time ago, a fan in our unit gave an alarm when the shaft displacement was 1mm. It was found to be an instrument failure.
Could it be that the steam pressure fluctuates less?
Does steam pressure have an effect on this too? The steam pressure was 3.8Mpa before, but now I have set the utility steam pressure to 3.9
It is indeed nothing. I would like to ask what the reason would be if it expanded and how to deal with it.