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Maintenance of vulnerable parts such as seals, impellers, and shafts of centrifugal pumps

Time of Release:

2023-07-05

A centrifugal pump is composed of a pump casing impeller, mechanical seal, shaft, bracket, motor, and other parts. The application of centrifugal pumps is very common, and many centrifugal pumps are prone to various faults after long-term use. Common components that are damaged include seals, impellers, shafts, and other vulnerable parts.

Maintenance of vulnerable parts such as seals, impellers, and shafts of centrifugal pumps

   A centrifugal pump is composed of a pump casing impeller, mechanical seal, shaft, bracket, motor, and other parts. The application of centrifugal pumps is very common, and many centrifugal pumps are prone to various faults after long-term use. Common components that are damaged include seals, impellers, shafts, and other vulnerable parts. The maintenance and installation methods for these components: Firstly, the mechanical seal of the centrifugal pump 1. The roughness of the contact area between the sealing gland and the static ring sealing ring is Ra3.2. The diameter gap between the gland and the shaft sleeve is 0.75-1.00mm, and the thickness of the gasket between the gland and the sealing chamber is 1-2mm. 2. The shaft or shaft sleeve installed in the mechanical seal area must have no rust spots, cracks or other defects on the surface, and a roughness of Ra1.6. The gland bolts should be tightened evenly to prevent the gland end face from tilting. After installing the static ring into the gland, it should be checked to confirm that the static ring is not skewed. 3. For pumps with axial thrust using rolling bearings, the axial clearance of the outer ring of the rolling bearing should be left at 0.02-0.06mm. When disassembling and assembling rolling bearings, the temperature of the hot installation should not exceed 120 ℃. It is strictly prohibited to use flame heating directly. It is recommended to use a high-frequency induction heater.


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