When we use a certain device, we may find that the device may always experience local wear and tear, which means that some components of the device are prone to wear and tear. When using a centrifugal fan, users will find that there are two main vulnerable parts in the equipment, namely the blades and the volute, and this phenomenon is particularly evident in power plants.
Firstly, I would like to introduce the wear and tear of the blades. The wear of blades varies among different devices. For example, some centrifugal fans have severe wear on their forward blades. The main areas of wear are the blade inlet, outlet, and near the root of the rear disc. Some fans also use radial straight plate blades. The wear exhibited by this type of blade is mainly serrated, with the wear mainly concentrated at the blade outlet, gradually weakening inward from the blade outlet.
In addition to the above two situations, in practical work, there are also some centrifugal fans that use backward wing blades. For this type of blade wear, the most severe areas are the outlet section near the rear disc and the blade head. If the blade head is worn, the blade cavity is easily invaded by coal ash, gradually causing the rotor balance to be disrupted and causing problems such as fan vibration.