What are the causes of turbine secondary oil pressure fluctuations?
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What are the causes of turbine secondary oil pressure fluctuations?
1. The pressure oil entering the electro-hydraulic converter fluctuates. 2. The 4-20mA electrical signal fluctuates. 3. The fluctuation occurs when the high selection valve is discharged. 4. The turbine changes operating conditions and is adjusted too frequently.
The oil pressure coming from the oil system is unstable； Process load fluctuates too much ； Instrument judgment error ； A clogged oil filter will cause fluctuations in secondary oil pressure during the switching process.
1: The oil pump outlet pressure fluctuates. 2: The CO control valve oscillates periodically. 3: Main steam valve and extraction valve fluctuate.
I would like to ask if the secondary oil pressure of our steam turbine fluctuates violently when it rotates above 7000 rpm. Is the large change in process load you mentioned the reason for the unstable change in main steam pressure and flow rate?