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Gear pump use and repair
(A). Use â‘ . Gear pump suction height generally not more than 500mm; â‘¡ gear pump should be connected to the motor through a flexible coupling to prevent unilateral stress, likely to cause gear pump shaft bending. Unilateral wear and tear (2) repairing the use of gear pump for a long time, the gear relative sliding surface will produce wear and tear, the wear of the end face of the axial gap increases, the gear round of wear and tear resulting in increased radial clearance, Tooth wear increased noise 1. Gear â‘ tooth repair: use paper or stone to remove the wound or polygamy burrs have been ground, and then the gear meshing surface swap the appropriate orientation of research, cleaning can continue to use But for the serious wear parts can be observed with the naked eye, should be replaced; â‘¡. Face repair: slight wear who can put two gears at the same time on the 0 # sandpaper grinding and polishing. Severe wear and tear can be two gears While grinding on a flat grinder to wear a little, and then into the sandpaper polishing phase. At this time the pump should also be worn to the same size. Two gear thickness difference within 0.005mm, the gear end face and hole perpendicularity should be controlled at 0.005 mm; â‘¢. Addendum circle: gear pump gear uneven in the radial Force F, the general wear and tear will appear after the addendum circle wear on the low-pressure gear pump volume efficiency is not significant, but for high pressure gear pump, you should consider plating the outer circle or replace the gear .2 pump body Of the repair is mainly the inner cavity and the gear tip circle phase interface, and the occurrence of more suction side, such as the pump is a symmetrical type, the pump body can be turned over 180 degrees and then installed .3 before and after the front and rear cover is mainly assembled, And gear sliding contact end of the wear and tear, such as wear and tear is not serious, you can grind the end face repair. Severe wear and tear can be worn in the surface grinder on the end of the groove marks. But this time, trapped oil dump The depth of the trough shallow, to eliminate the dead volume of the trapped oil ineffective; 4. pump shaft gear pump failure of the main form of contact with the needle roller bearings are easy to wear, a small amount of bending.If a slight wear and tear, Can be polished and repaired.If the wear is serious, you need to re-processing, the keyway on the long axis of the center line with parallelism and symmetry requirements, installed in the axis of the flat key and the keyway slot with the intermittent can not be too large, the shaft shall not be Gear generated within the radial swing, shaft and gear shaft installed Concentricity surface is 0.01mm, the concentricity of the two journals is 0.02-0.03mm.