The permanent magnets of magnetic pumps contain carbon powder
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I’m seeking help – a magnetic pump has been in operation for several hours; samples were taken from it during that time, and when the pump was stopped, there was a clicking sound. When the pump was started again, it wouldn’t work; upon disassembly, carbon powder was found on top of the permanent magnet, and the shaft sleeve was broken. Seeking an explanation
The medium contains a large amount of ferromagnetic contaminants, which enter the pump. Through the internal circulation circuit, these contaminants adhere to the outer surface of the inner magnetic rotor. The small gap between the inner magnetic rotor and the isolation sleeve gets blocked by these contaminants, thereby grinding the isolation sleeve and causing the inner rotor to deflect under stress; as a result, the silicon carbide sliding bearings are subjected to stress and break. It is recommended to install a magnetic filter at the pump inlet; if the level of impurities is too high, such magnetic pump cannot be used any longer. What power rating does this magnetic pump have, to have such a large imbalance in the internal rotor?
Magnetic pumps don’t have much carbon buildup; it’s caused by impurities in the fluid coming into contact with and rubbing against the internal magnetic rotor.
It was the bearing that failed first, causing the magnetic blocks to scrape together and get stuck.
This pump is quite rough, but the apparent cause of the damage is related to the medium used
The medium is too dirty; isn’t there any backwash filter or similar device in front of the pump? :L:L:L
For newly installed equipment and pipelines, a filtering device should be placed at the inlet to prevent impurities from construction processes as well as welding slag from entering the pump.
The catalyst contains powder, metal powders; plus, due to evacuation, silicon carbide is too brittle and breaks as soon as it’s separated
Special attention must be paid to magnetic pump before starting up the equipment; the fewer impurities such as weld slag, the better. Once it’s running properly, and if there are no quality issues with the pump, it can be used freely without breaking down easily!
Dry grinding was caused by pump evacuation or cavitation, which damaged the bearing sleeves; identify the possible causes of fluid loss or cavitation