Installation of bearings with limits in the bearing housing of ordinary centrifugal pumps
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Today, during maintenance work, I came across a centrifugal pump. There is a fixed bearing stop at the bearing on the drive side. When installing the shaft, it is not possible to fit the bearing on the non-drive side onto the shaft first. In such a situation, should the bearing on the non-drive side be placed in the bearing housing first, or should the shaft be fitted onto the upper bearing first? How can we ensure that both bearings are installed in their correct positions? I wonder if imposing such limits is appropriate; how can the installation accuracy be ensured?
The bearing on the non-drive side is a cylindrical roller bearing (integral type), while the bearing on the drive side is a deep groove ball bearing; the shoulder is located on the drive side. I’ve tried installing it many times; the bearings on the non-drive side just won’t fit properly. When I hit them, problems arise with the drive side as well, and there’s an issue with the spare parts for the bearing end caps.
Upload some pictures. . Such text. . I can’t even imagine what it looks like
You can draw it by yourself. . Can’t it be adjusted into place by pressing down on the screws of the cover? .
First, install the bearing on the shaft; positioning is achieved by relying on the shaft shoulder. Then, install the entire assembly in the bearing housing – determining whether it’s in place is mainly done by listening to the sound; when it’s properly positioned, the sound is relatively muffled
The inner ring of a cylindrical roller bearing can be removed; first, install the inner ring of the bearing on the shaft, and the same is true for deep groove ball bearings
It’s from the NU series, small in size, and cannot be disassembled; I’m not sure about the sequence for installing the bearings
Only one end can be fitted, as there is a shoulder; if both ends are installed, it won’t fit through. It’s that ordinary bearing housings have limits, but it’s a bit unclear as to the installation sequence of the bearings.
There is a limit snap ring inside the bearing housing, with the fixed end being the drive end. When installing the bearings, the bearing at the drive end is placed directly on the shaft and secured with a locknut. At the non-driving end, first press the bearing into the bearing housing, secure it with a bearing end cap, and then install the shaft. That was the sequence at the time, but the inner rings of the shaft and the non-driving-end bearing were 5 microns out of alignment, which meant they couldn’t be fitted properly. I’ve never seen a retaining clip with such limits before; I’m not sure if this is the correct way to install it.