I would like to ask about vibration problem I found on site.
I found 2x high axial vibration on 22 kW motor running on 2955 rpm coupled on pump
Highest vibration at NDE motor with 14.31 mm/s
I suspect there is bent shaft or cocked bearing because spectrum shows 1x 2x 3x when operated solo run, but since the coupling doesnt have spacer I have to move the motor and only able to test it with loose bolt
My phase measurement as follow
PDE - PNDE Axi. : 46 deg out of phase
PDE Hor. - Ver. : 279 deg out of phase
PNDE Hor. Ver : 278 deg out of phase
MDE - MNDE Axi : 205 deg out of phase
MDE Hor. Ver : 127
MNDE Hor. Ver: 309
I have measured phase on face of bearing (axial) with direction of 12:00 and 03:00 but I lost the data, can we conclude the problem without this phase data?
And also, is there a possibility of twice line frequency vibration? I don't have much experience on this topic but doesn't twice line frequency usually occur on radial side, does it?
Does looseness also suspected? Based on my spectrum there is harmonic and the pump is installed and grouted on top of previous pump baseplate to accomodate the suction pipe height. The anchor bolt is not installed and the baseplate welded into the existing one, I'm worried if the baseplate is bent causing the level of the pump all messed up because the angular alignment process is quite hard.
Attached my spectrum and photo of pump set
Thank you very much for reading my post and hope too hear from you guys soon