Fault analysis of bearing vibration
Not secure before fastening the equipment:The fasteners of centrifugal fans mainly include the following: machine base, base, foot bolts, volute and connecting pipe. Our company found that the vertical vibration of bearings increased when conducting independent investigation of customers' fans, and the value of vibration was abnormal. A comprehensive random investigation was conducted on the centrifugal fan, but there was no problem with these devices. After a more detailed investigation, it was found that the bearing seat was based on a flat steel plate, and the steel plate was fixed on the foundation of grouting with foot bolts. When checking, it was found that the anchor bolts were loose. After tightening, there was no problem.
Interaction between moving parts and fixed parts:We know that when the centrifugal fan body runs for too long, the impeller of the centrifugal fan follows the air inlet on an axis, which is very prone to deformation, resulting in collision between dynamic and static parts, and also produces body vibration.