Problems with shielded pumps
Thread Content
What causes the shaft sleeves, thrust discs, and bearings of shielded pumps to darken? It has only been a few months since it was repaired. I hope some expert can give me some guidance!
Whether it is related to the materials, for reference.
Looking at the color of the thrust disc, it seems to be due to high temperature
Judging from the color of your thrust disc, it is preliminarily assumed that the darkening is caused by low fluid levels and high temperatures.
This color indicates that the internal temperature of your shielded pump is too high, with no cooling or lubrication provided by the material itself. Additionally, check whether air or moisture is present in the material, as well as whether the filter at the pump inlet is clogged, which could lead to poor feeding. The above information is for reference only
Is the flushing pipe blocked? Is the flow rate at the inlet insufficient? Are the bearings not receiving adequate cooling and lubrication? Is the shaft displacement too large or too small?
#Here is a quick response: #Check the cooling water circulation, as well as whether the rotor offset is too large or too small. For reference.
Some time ago, our workshop also disassembled a PN-type shielded pump, and the colors of all its parts were excellent, with no issues regarding their gloss. We are used to hold liquefied petroleum gas