Online repair of high temperature fan bearing wear - bearing knowledge

High temperature fan bearings wearing traditional repair method of repair welding and processing: thermal stress concentration, easy to cause the axial bending deformation or fracture, and for large axial or bearing housing repair, comprehensive cost is high, the repair cycle is long, the intensity of labor is big, the processing equipment demanding strict; At the same time can not be implemented online repair; Brush plating: demanding for driving part wear form, wear uniform, wear depth of less than 0. 2 mm, repair efficiency as the brush plating thickness increase exponentially decreasing, when the brush plating thicker, fall off easily; Thermal spraying, the spray coating thickness have strict requirements, for large axial or bearing housing repair, comprehensive cost is high, the repair cycle is long, the intensity of labor is big, demanding strict with processing equipment, and can not be implemented online repair; To sum up, repair welding machining, thermal spray repair process can not be implemented online repair, while the brush plating can realize the online repair, but for the wear depth requirements more stringent, that in addition to whether have better online repair process? Sauvy carbon nano polymer materials technology on-line repairing wearing this technique is to use material of high temperature fan bearing characteristic of the mechanical properties and corresponding repair process online repair wear and other large axial fan. The technology to repair the advantage of high temperature fan axis wear has the following points: ( 1) Good bond pressure resistance, abrasion resistance and have metal comprehensive mechanics performance of elastic deformation and so on to realize online repair, repair of high efficiency, no need to equipment of disassembly, usually eight hours to complete the repair; ( 2) The technology similar to a cold welding technology, the online repair process does not produce high temperature, good to protect equipment from damage of ontology, and in the process of repair is not restricted by axial uneven wear quantity; ( 3) After repair in use process will not cause metal fatigue wear, on the premise of normal equipment maintenance, the service life of repaired even higher than the service life of the new parts. Online repair wear high temperature fan bearing a case shows the high temperature fan: spindle diameter of 160 mm, the speed of 1500 r/min, drive side parts bearing wear, wear width is 80 mm, the wear depth is about 0. 2 - 0. 5mm。 Repair process is simple: to not wear surface as a benchmark, sauvy tooling repair technology is adopted to improve the online repair.