The dangers of long-term idling of centrifugal pumps.
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When transporting materials, in order to save trouble, the pump workers turn on the pump and leave it alone, maybe coming back after an hour. For example, the pump completes transporting the materials in half an hour, and the remaining time is idling. What kind of harm does this have? The seal is stuffed. What if it is mechanically sealed? Thanks.
If the feed is gone or not enough, the most direct consequence is that the pump will vibrate sharply due to cavitation and air binding, and will soon be scrapped! Whether it is a packing seal or a mechanical seal, it is the same!
When the centrifugal pump is idling, the temperature of the pump will rise, which can easily damage various parts of the pump. No matter what form of seal it is, even if it is not damaged, it will* * Reduce service life! Therefore, it is absolutely not allowed in actual operation:L
We have a machine that grinds a few millimeters into the bearings.
More harmful: (Your pump workers! ) 1. Waste of electric energy 2. The pump will vibrate violently due to cavitation 3. The pump body will heat up, and in severe cases it will hold the shaft. 4. The seal will leak easily, which is a safety hazard. This problem must be corrected!
The pump body heats up and parts are easily damaged. If it is a mechanical seal, the mechanical seal will burn out quickly.
The situation mentioned by the poster probably does not happen. The pump will heat up and be damaged after idling for a short time. Generally, it will cause the pump shaft to lock up and the motor to trip due to excessive load.
Cavitation will occur. In mild cases, the impeller will be pockmarked. In severe cases, the pump will be scrapped.
Needless to say, it’s a pump. Just turn a flashlight around for an hour and see what it feels like.
It would be nice to add a liquid level interlock, otherwise the operator's labor intensity will be very high.
Seals and bearings will burn out due to heat.