Belt Driven Fan Vibration

Belts along with electric motors shafts and pulleys are a critical component of power transmission in belt drive systems.

Belt driven fan vibration.

The axial vibration levels were high but slightly different on each bearing. This vibration pattern is not typical for a belt drive. 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.

In this report we will have to discuss problem of vibration for one centrifugal fan with the help of the vibration analysis technique. Fatigue type failure in fan components due to continued exposure to abnormal loads or vibration. Problems due to the shafts or pulleys misalignment eccentricity etc cause vibration at 1x rpm of the component with the problem i e. Most vibration was at the fan shaft rotational frequency.

Fan wheels may not be perfectly symmetric and may become out of balance due to a change in. Vibration analysis is a condition monitoring test which is widely applied for determining the operating condition of any rotating machine for example centrifugal fan. When it is present the vibration at fan speed is typically the highest vibration peak in spectra taken on the motor. Belt drive problems and drive misalignment.

Both axial readings were in phase at running speed as determined by cross channel phase readings. Sheave misalignment is a very common problem with belt driven fans.