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Paper mill vaccum pumps motors are being monitored by CSI2130 for vibration as well as current signature.MCSA gives healthy rotors. Almost in all motors vibrations are quiet low that is less than 1mm/sec for all positions.Peakvue on Non-driving end is also quiet low but on Driving end it is always more than 5g.Almost in all motors, driving end peakvue spectrums an unrelated freq of 3060cpm alongwith its harmonics is observed.This freq is having an order of around 3.07.This is also quiet...Read More...
Last Reply By Ralph Stewart · First Unread Post

Electrical motor vibration

Hello to all, need your help. We have an AC-motor uncoupled, measured vibration at free end in all 2 direction with 2.4 mm/s, in axial direction 1.2 mm/s, at the drive end in horizontal direction with 3.1 mm/s but in vertical direction with 14 mm/s. Bearings were just exchanged due to high vibration , but vibration increased after change. Phase measurement between free end vertical and drive end vertical are 180 deg apart, the same between horizontal free end and drive end, No soft foot,...Read More...
Last Reply By OLI · First Unread Post
Hi, I am bit confused with the acceleration severity limits( 'g ' values ) for high speed and low speed machinery. so, kindly let me know what are the standard limits.I will be very thankful if you send me a copy of that. nag.cherry99@gmail.com Thanks in advance, Regards, NAG.Read More...
Last Reply By nag · First Unread Post