Vibration of FD fan

Get new comments by email
You can cancel email alerts at anytime.
Comments (2)

PKS in Manama, Bahrain

78 months ago

FD fan with Journal Bearing of shaft 6" dia. is having 2 speeds. In 750 speed the maximum Vib at FDE H is 0.5 mm/s and at 1450 speed the vibration at same location is 10 mm/s. Recently the fan DE Bearing was replaced. The signature at high speed shows high Pk in 1x and the harmonics of 20-25 pks. Can you suggest what may be the possible cause of vibration.

- Was this comment helpful? Yes (6) / No (2) Reply - Report abuse

Tom in Ann Arbor, Michigan

67 months ago

the system is going in to resonance at 25 hz, try changing the mass of the fan or the stiffness of the shaft and shaft mounting system

- Was this comment helpful? Yes (1) / No (1) Reply - Report abuse

» Sign in or create an account to comment on this topic.