Hi guys, i,ve a problem with 4Poles Generator 8Mgw in Turbocompressor Solar Mars (Turbine-gearBox-Generator), High Level Vibration Axial NDE 2x (2x1800=3600cpm), 0.26 in/seg(pk).
A) The first test were with change Load level (decrement from 8Mgw to 0.5 Mgw),
Decrease in amplitude is observed due to the change load level:
8Mgw, Level vibration @2x= 0.26 in/seg(pk), the last level (0.5Mgw)= 0.08 in/seg(pk). View Anex.
Phases: NDE Axial
1x= In fase (4 axial points, 12,3,6,9)
2x= OutFase 90degres (12,3,6,9)
view anex PCM-1...docx
Observed sidebands 525cpm in 1x and 2x
B) Last test
In RunUp, at the moment of feeding voltage (12kv) break inside,
the vibration at twice the turn (2x) appears in a high way.
Also a resonant zone is observed at approximately 1500cpm,
this excites the rotation frequency (1x). See Annex 2) .- HsXXXX .... docx