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Whirl in vertical pumps
- Thread starter SPLIT
- Start date
Hi Split
in my world, whirl is the most common cause of subsynch vibration although pulsations from other sources is right up there too.
Karassik (Pump Handbook) has a good table showing the relative frequency of various vibration causes.
Cheers
Steve
in my world, whirl is the most common cause of subsynch vibration although pulsations from other sources is right up there too.
Karassik (Pump Handbook) has a good table showing the relative frequency of various vibration causes.
Cheers
Steve
dgallagher
Mechanical
Other possibilities include: A rub, flow induced instability, check bearing cage fault frequency. Also,as the pump is loaded, additional stiffening occurs from internal seals and wear rings. This could increase the resonance frequency.
Dave G.
Dave G.
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