Multi-stage pump bearing clearance
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In a multi-stage pump that is operating normally, the mechanical seal is leaking. After replacing the mechanical seal at the drive end, the shaft bearing housing was installed, along with the positioning pins. Shouldn’t there be any need for adjustments after that? After installing the tile seat and tightening the two bolts, the pump can no longer be rotated – what could be the reason? How to get rid of it?
Is there a cross-section with a pump? Send one for a look
No, there is no technical documentation at all\ud83d\ude30
It is very important to know what the structure of a pump is. It's better to look at the image to analyze it.
Vertical or horizontal? Send the structure diagram
The gaskets at all levels, as well as those at the pump end, can be adjusted.
Since you suspect there is a problem with the bearing shell clearance, you can check the clearance (by using a lead wire)
For every maintenance session of a sliding bearing, it is necessary to check the top clearance of the bearing, the bearing tension, as well as the contact condition between the lower bearing shell and its socket.
Is it a problem with the bolt tightening?
I measured the gap by using a dial indicator, and there was no gap. On the junction surface between the upper and lower bearing shells, I added another 0.10 mm of copper sheet on top of the existing 0.10 mm layer, and upon re-measurement the gap between the bearing shells was 0.05 mm. What I don’t understand is that the lower bearing shell has positioning pins, so the gap should be fixed; moreover, the gap between the bearing shells should increase as the pump is used. So how is it that there’s no gap at all?
Perhaps the pad that sits at the joint between the upper and lower tiles was dropped when you removed it, and as a result there is no gap at the top of the tiles when they are installed