Belt Driven Fan Vibration

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

Belt driven fan vibration.

The axial vibration levels were high but slightly different on each bearing. Belt drive problems and drive misalignment. 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.

Vibration analysis is a condition monitoring test which is widely applied for determining the operating condition of any rotating machine for example centrifugal fan. Eccentric pulley on the fan causes vibration at 1x rpm of the fan. Belts along with electric motors shafts and pulleys are a critical component of power transmission in belt drive systems. When it is present the vibration at fan speed is typically the highest vibration peak in spectra taken on the motor.

This vibration pattern is not typical for a belt drive. In this report we will have to discuss problem of vibration for one centrifugal fan with the help of the vibration analysis technique. Problems due to the shafts or pulleys misalignment eccentricity etc cause vibration at 1x rpm of the component with the problem i e. Both axial readings were in phase at running speed as determined by cross channel phase readings.

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. Fan wheels may not be perfectly symmetric and may become out of balance due to a change in.