Belt Driven Fan Vibration

This vibration pattern is not typical for a belt drive.

Belt driven fan vibration.

Both axial readings were in phase at running speed as determined by cross channel phase readings. 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. 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. The axial vibration levels were high but slightly different on each bearing. Belt drive problems and drive misalignment. Belts along with electric motors shafts and pulleys are a critical component of power transmission in belt drive systems.

Fan wheels may not be perfectly symmetric and may become out of balance due to a change in. Eccentric pulley on the fan causes vibration at 1x rpm of the fan. It is important to realize that some of the belt drive vibration problems listed above do not cause vibration at belt related frequencies. Most vibration was at the fan shaft rotational frequency.

While belts require very little maintenance improper belt tension misalignment of pulleys mishandling of belts and environmental factors are common problems that can shorten the life of your belts and bring your system to a halt. When it is present the vibration at fan speed is typically the highest vibration peak in spectra taken on the motor.