Belt Driven Fan Vibration

Sheave misalignment is a very common problem with belt driven fans.

Belt driven fan vibration.

It is important to realize that some of the belt drive vibration problems listed above do not cause vibration at belt related frequencies. It can be confirmed by measuring phase in the axial direction at fan speed. When it is present the vibration at fan speed is typically the highest vibration peak in spectra taken on the motor. Fan wheels may not be perfectly symmetric and may become out of balance due to a change in.

The axial vibration levels were high but slightly different on each bearing. Eccentric pulley on the fan causes vibration at 1x rpm of the fan. Fatigue type failure in fan components due to continued exposure to abnormal loads or vibration. Vibration analysis is a condition monitoring test which is widely applied for determining the operating condition of any rotating machine for example centrifugal fan.

In this report we will have to discuss problem of vibration for one centrifugal fan with the help of the vibration analysis technique. Belts along with electric motors shafts and pulleys are a critical component of power transmission in belt drive systems. Loosening of hardware on the fan or deterioration of the structure and hardware supporting the fan. Problems due to the shafts or pulleys misalignment eccentricity etc cause vibration at 1x rpm of the component with the problem i e.

Belt drive problems and drive misalignment. Both axial readings were in phase at running speed as determined by cross channel phase readings.