Leakage in the liquid ring vacuum pump
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In liquid ring vacuum pumps, the mechanical seal is damaged due to blockage caused by the circulation of cooling fluid, which leads to wear of the seal; liquid leakage occurs when the pump stops operating. However, once it is started again and operates normally, there is no more liquid leakage. I’m wondering if there might be negative pressure inside the pump, which could draw in air and pose a certain safety risk. Since the internal structure is not very clear, please give some guidance.
I’m not familiar with liquid ring vacuum pumps; the fact that there is no leakage during operation is likely due to a vacuum condition inside. The seal still needs to be replaced, and it is also necessary to ensure proper flushing of the seal.
The seal ring is damaged; it doesn’t leak when opened, so it must have been sucked into the pump.
What medium is used in the pump? The mechanical seal also needs to be cooled! Leakage of the mechanical seal when the pump is stopped, but normal operation when the pump is started, indicates severe wear of the friction pairs in the mechanical seal, or that the elastic elements of the mechanical seal have become stuck with dirt and lost their elasticity Conduct an inspection; replace the mechanical seal if necessary. The compression amount must be appropriate, as too high a value will cause rapid wear of the friction pairs in the mechanical seal!
For general vacuum pumps, the sealing types used for double-end face mechanical seals are mostly 53a and 53b; it is possible to check whether the liquid level in the sealing tank has dropped； If there is indeed a leak in the seal, it must be replaced; otherwise air will be drawn into the pump, and in the most severe cases, an explosion can occur····
Let’s see what medium it is; it’s not that serious: lol
Safety matters in chemical production cannot be taken lightly at all