How to examine and repair of horizontal centrifugal slurry pump

How to examine and repair of horizontal centrifugal slurry pump

(1) the impeller the impeller and other parts repair friction abrasion generated, the welding method to repair. For the impeller of different materials, the welding method is different. After welding, should be in the lathe, the surfacing layer car to the original size. Thick layer formed by acid, alkali for impeller corrosion or erosion of the media thinning, stomatal cast iron impeller or slag and cracks caused by vibration or collision, under normal circumstances is not repaired, can use the spare parts to replace the new. However, if you must repair, “repair welding method” to repair. Repair welding of impeller, according to different materials, using different methods of repair welding.

(2) cylindrical impeller inlet end and an outlet end, the radial runout should generally not exceed 0.05mm. If more than not enough (within 0.1mm), can be in the lathe to 0.06~0.1mm, which is in accordance with the requirements of. If more than many, should straightness deviation checking of the slurry pump shaft is too big, can use straightening shaft method to repair, to eliminate the impeller radial runout.

Shaft repair sleeve is centrifugal slurry pump wear parts. If the wear is very small, only some worn very shallow, methods can be used to repair welding, welding and then turning to the original size, still can continue to use. If more serious wear, the wear scar of deep, you should replace the new sleeve.

(3) horizontal centrifugal slurry pump shaft bending direction of the repair of slurry pump shaft and the amount of bending is measured out, if the bending amount exceeds the allowable range, you can use the method of straightening, the slurry pump shaft straightening. By the slurry pump shaft local wear, if wear depth is not too large, the wear parts with welding method to repair. Welding should be in turning to the original size. If the wear depth is larger, can “insert parts repair method”.

(4) on the wear of slurry pump shaft is serious or crack, generally do not repair, and spare parts for replacement.

The side of the slurry pump shaft keyway, if minor damage, can be used for repairing light file. If there is skew more serious phenomenon, should use the welding method to repair. Repair, first with the arc welding a keyway shape, and then use the milling, planing or manual filing method, to restore the original size and shape of the keyway.

In addition, can also be used to change the keyway position methods for repair. The first full welding of the original key position, and then surface filing, make its surface curvature radius and axle neck, and form a smooth connection. Finally, the shaft rotates 180 DEG, the corresponding position behind the original key position, according to the original size and shape of the keyway, produce new keyway.

(5) repair of rolling bearing outer ring of the slurry pump body in the bearing hole slurry pump rotation, will Zhou Chengkong’s inner circle grinding defects or step size, striation etc.. For these defects were repaired, should first be fixed to the slurry pump body hit the bed.

1 bearing hole boring, then according to the size of insert bearing hole boring.

2 for cast iron slurry pump body, appear slag or defects such as pores, the first defect to clean up, and then welding.

3 slurry pump body due to vibration, collision or percussion and crack when, can use oxygen acetylene gas welding or arc welding.