Gear wear repair: gear wear parts are mainly tooth meshing, involute face and gear at both ends of the plane. Slight wear, the tooth surface can be whetstone grinding, both ends of the flat grinding on the flat light. Serious wear gear teeth should be replaced with new gear, if only the ends of the gear wear, grinding grinding in the surface grinder. Shaft wear and tear repair: gear pump shaft wear mainly due to the friction between the ends of the shaft and the support needle roller wear, the smaller the shaft diameter. If it is slightly worn, the shaft can be enlarged by plating a hard chrome to make the shaft repaired. If the shaft wear serious, 45 steel or 40Cr steel should be re-manufactured, shaft rough rough, fine car, the bearing parts to be heat treated, the hardness of HRC60-65, and then grinding, the bearing surface roughness Ra with parts Greater than 0.32μm; shaft roundness and cylindrical tolerance of 0.005mm; with the gear with the H7 / h6, the surface roughness Ra should not exceed 0.63μm. Pump needle roller bearings repair and replacement: repair parts in the pump, the needle roller bearings should be replaced. Needle on the needle is: the size of the needle roller diameter error should not exceed 0.003mm, the length tolerance of 0.1mm, and the shaft with the gap should be around O.Olmm; needle roller assembly according to the number of requirements filled bearing shell, Needle roller to be arranged parallel to each other. Pump needle roller bearings repair and replacement: gear pump shaft wear is mainly due to friction between the shaft ends and supporting needle roller wear, the smaller the shaft diameter. If it is a little worn out, the shaft diameter can be enlarged by plating a hard chrome to repair the shaft. If the shaft wear serious, 45 steel or 40Cr steel should be re-manufactured, rough rough shaft, after finishing, the bearing parts to be heat treated, the hardness of HRC60-65, and then grinding, so that the bearing surface rough with Ra Not greater than 0.32μm; axis of circularity and cylindrical tolerance of 0.005mm; with the gear with H7 / h6, rough surface roughness Ra should not be greater than 0.63μm. Shaft wear and tear repair: gear wear parts mainly tooth meshing, involute face and gear both ends of the plane. Slight wear, the tooth surface can be used Whetstone grinding, both ends of the flat grinding and polishing. Serious gear tooth surface wear should be replaced by new gear, if only the gear at both ends of the plane wear, grinding grinding in the surface grinder. Wear and tear gear repair: After the pump parts repair, the needle roller bearings should be replaced. Needle on the needle is: the size of the needle roller diameter error should not exceed 0.003mm, the length tolerance of 0.1mm, and the shaft with the gap should be around O.Olmm; needle roller assembly according to the number required to cover the bearing shell , Needle roller to be arranged parallel to each other.
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