1wear of blade
①Front blade, mostly at the blade, outlet and near the root of the posterior disc.
②radial straight plate type blades. Generally serrated shape, its wear part is mostly at the blade outlet, gradually reduced from the blade outlet inward.
③backward wing type blades. The wear of the backward wing blade is in the outlet section near the rear disc side and the blade head. After the blade head wear, the blade cavity is easy to enter the coal ash, destroy the rotor balance, relatives vibrate.
④backward straight plate blade. The wear part of the rear straight blade suction fan is on the middle side of the blade outlet.
2Wear of volute
All kinds of centrifugal fan volute wear more serious parts are near the volute tongue.