gas turbine vibration
gas turbine vibration
(OP)
When up to operating speed, what might cause a gas turbine to vibrate slightly even though the rotor is balanced? I'm not talking excessive here, just enough to draw a small crowd.
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RE: gas turbine vibration
Dave G.
www.reliabilitydirect.com
RE: gas turbine vibration
RE: gas turbine vibration
RE: gas turbine vibration
You do not mention if gas turbine is driving a generator, pump or compressor. Depending upon application a reduction gear will probably be associated with the GT. Differing vibration amplitude readings at different locations should tell you if vibration is coming from GT shaft or from reduction gear. Analysis of primary vibration frequency will tell you if you have lost a blade as Borjame suggests, or if it is a more complicated problem. Is vibration amplitude speed-dependent or rather load-dependent ?. Your GT (and reduction gear) should normally be equipped with vibration sensors, so you can do a little rough analysis before placing your own sensors in strategic locations.
RE: gas turbine vibration
Get some accelerometers on the engine and maybe a couple on the surrounding structure to get some hard data to work with.
RE: gas turbine vibration
Did this come on all at once, or has it been so from day one?
Has the compressor been cleaned lately, or not??
Can you answer any of the questions in the previous replies?
Is it still vibrating, or has it shelled itself yet?