Why can the pump be easily rotated by hand in one direction, but not in the other?
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I have a pump in an oil stripping tower; after replacing the mechanical seal, it is possible to turn the pump fairly easily with one hand, but it is very difficult to do so when turning it in the opposite direction. Why is that? Could my analysis be that there is contact between the static ring and the shaft? But this also doesn’t explain why the vehicle can’t move in the opposite direction. It is a regular centrifugal pump. Please, expert, give an explanation
Is it a centrifugal pump? Does it have a gearbox? If it’s a regular centrifugal pump, it should be possible to rotate it in both directions without any problems; try turning it with force – there shouldn’t be any issues
I’ve encountered this issue; open the bearing housing to check the bearings! !
There is a 1mm gap between the diameter of the stationary ring and the shaft; how is it possible for the stationary ring to be in contact with the shaft? Generally, the force applied when turning the shaft is consistent, and it doesn’t become very high at any particular point, so usually there are no problems.