Belt Driven Fan Vibration

Both axial readings were in phase at running speed as determined by cross channel phase readings.

Belt driven fan vibration.

Problems due to the shafts or pulleys misalignment eccentricity etc cause vibration at 1x rpm of the component with the problem i e. In this report we will have to discuss problem of vibration for one centrifugal fan with the help of the vibration analysis technique. Loosening of hardware on the fan or deterioration of the structure and hardware supporting the fan. Most vibration was at the fan shaft rotational frequency.

When it is present the vibration at fan speed is typically the highest vibration peak in spectra taken on the motor. Vibration analysis is a condition monitoring test which is widely applied for determining the operating condition of any rotating machine for example centrifugal fan. It is important to realize that some of the belt drive vibration problems listed above do not cause vibration at belt related frequencies. The axial vibration levels were high but slightly different on each bearing.

Fan wheels may not be perfectly symmetric and may become out of balance due to a change in. Belt drive problems and drive misalignment. This vibration pattern is not typical for a belt drive. It can be confirmed by measuring phase in the axial direction at fan speed.

Fatigue type failure in fan components due to continued exposure to abnormal loads or vibration. Belts along with electric motors shafts and pulleys are a critical component of power transmission in belt drive systems.