Underwater pump turning
Thread Content
Regarding the turning of submersible pump shafts, due to the presence of components such as drive shafts, pump shafts, and sliding bearings, it is inevitable that the shaft may not be able to be turned during installation. What is the main reason for this inability to turn the shaft?
After the submersible pump has been repaired, if the machine cannot be rotated, it may be due to an incorrect adjustment of the axial clearance. In this case, it is sufficient to adjust the axial clearance.
In fact, there are not many areas in submersible pumps where mechanical interference occurs; by being careful during assembly, it should not be impossible to rotate them. 1 Gap between the inlet and outlet rings of the impeller 2 Gap between the front and rear cover plates of the impeller 3 Gap of the sliding bearings 4 Are the bearings in place? Hope this helps!!
Bearing clearance, solidification of the conveyed medium (including impellers and bearings)
The most troublesome aspect of these pumps is the precision of their sealing installation; it must be accurate, as any lack of attention can lead to leakage and damage to the bearings. Adjustment is made step by step during pile retraction; usually, improper installation is the cause of changes in length. It’s a detailed task.
Most likely, the shaft hasn’t been lifted properly, and its axial positioning isn’t correct. Lift the shaft and turn it to see if it moves; submersible pumps are very simple.
First, the division was not done properly; second, the gap in the mouth ring is too small; third, the gap in the sliding bearing is too small; fourth, the pump shaft is bent； Analyze using the process of elimination