The wear of transmission parts of centrifugal fans is a common equipment problem, which includes the wear of bearing position, bearing chamber, blower shaft, bearing position and so on. In view of the above faults of centrifugal fan, traditional maintenance methods include surfacing, thermal spraying and brush ferry, etc. The thermal stress caused by high temperature repair welding can not be completely eliminated, which can easily cause material damage and lead to bending or fracture of components; while brush plating is limited by coating thickness and easy to peel off, and the above two methods are metal repair, which can not change the hard-to-hard matching relationship. Under the combined action of force, the rubber-coated drum will still be worn again. The repairing method of polymer composites has comprehensive properties such as adhesion, excellent compressive strength and so on. It can be disassembled and machined free. There is no effect of thermal stress in repairing welding, and the thickness of repairing is not limited. At the same time, the metal material of the product does not have the retreat ability, which can absorb the shock and vibration of the equipment and avoid the possibility of wear again.
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