Recent content by floyds

Dear FredGarvin, I did. Vibration spectrum at radial(vertical & horizontal), have the same dominant frequencies at 5,500RPM. Both frequencies(5,500RPM and 1,500RPM) have harmonics. Please have a look at 2 files attached. Dear Brewnog, Thank You for the opinion. I'll make a new...

dear brewnog, it is. we used helical gear at gearbox. thank you

Dear fredGarvin, thank you for the opinion, I don't know what the 1E Vibration mean..? when unbalance happen, 1XRPM(1500RPM) at running speed would present at spectrum. Resonance itself hard to understand for me. can resonance happen due to our activities in changing the bearing(part of...

Dear fredGarvin, thank you for the opinion, I don't know what the 1E Vibration mean..? when unbalance happen, 1XRPM(1500RPM) at running speed would present at spectrum. Resonance itself hard to understand for me. can resonance happen due to our activities in changing the bearing(part of bearing...

dear FredGarvin, we did. we have change the bearing both side, and nothing change in amplitude. we always keep it(PMG) runs at 50Hz, so I guess electrical problem due to line frequency(difference air gap between stator and rotor) should come at 6000 RPM (is not the real problem). Because our...

hi guyz, I have Turbiine(5500RPM)-Gearbox(output 1500RM)-Generator-Exciter-Permanent Magnetiic Generator(PMG). I have problem with high axial vibration at ball bearing permanent magnetic generator. Axial vibration at 5500RPM, but it rotate at 1500RPM. This overall is 3-5 times radial...