Why is the vibration level on the intake side of the turbine reduced, while it increases on the exhaust side?
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The inlet air is high-pressure steam at 8.8 MPa; sometimes this causes some vibration at the low-speed end of the gearbox. Please discuss this issue... Thank you. It’s a 1-to-3 air compressor
Please be as detailed as possible in your description; that will help with analyzing the problem!
This phenomenon occurs only occasionally, but lately it happens several times a day: the vibration level on the intake side of the turbine decreases while the vibration level on the exhaust side increases. That’s exactly what’s happening
Reply to 3# 331463532: Check the steam exhaust cylinder drain
Will your steam contain water? It would be best to identify the changes in trends, hey
The description is not very detailed. First, how is the 1-to-3 unit arrangement in your system? Second, is the vibration amplitude changing gradually or suddenly? Third, does the phase change as the vibration amplitude changes? Fourth, does the vacuum level change during the variation of the vibration amplitude in your unit? Fifth, when the exhaust end vibrates, does the vibration level of the drive machine connected to it change? (Remember, it does change – it may increase or decrease.) Lastly, how long has this unit of yours been in operation?
Reply to 6# wm1208: It’s generally the same, right? Booster – gearbox – turbine – air compressor... I think the situation with one unit serving three systems should be similar in this case. On the intake side and the exhaust side of the turbine, the vibration levels change slowly; it’s a gradual process, and the trend is quite clear. There’s no significant change in vacuum levels, and the steam quality can remain at 8.5–9.2 MPa. The unit’s operating time probably isn’t 8,000 hours yet; after two years, it would have been shut down for a long time...