Regarding the gear pump, I have a question for a layman.
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If the gear and the pump casing are not tightly matched and the gap is relatively large, and the pressure on the left is low and the pressure on the right is high, will the liquid flow back?
Can you ask about the twin-screw pump? It is said that it has the same principle as the gear pump, but it seems that it is not sealed after the liquid enters the screw.
There will be no reverse flow, and the outlet flow and pressure will definitely be reduced.
The gap is large, and part of the liquid circulates in the pump, causing the pump body to heat up and no backflow will occur.
In extreme cases, if the gear is corroded and the gap is large, if it is not discovered in time, will there be reverse flow?
This post was last edited by 1070273960 on 2017-9-19 09:22 Theoretically, the twin-screw pump is a non-sealed pump, but it has a sealed cavity during normal use. Moreover, since the working rotors of the twin-screw pump do not contact each other, it has good wear resistance and a long service life. We specialize in the production of twin screw pumps
In extreme cases, the material cannot come out, and the gear pair must be replaced.
If the gap is large, part of the liquid will circulate in the pump, which will cause the pump body to heat up, but backflow will not occur.
It will flow backward when the pump is stopped!
This extreme situation has never been encountered. In practice, the gap is too large and the outlet pressure and flow rate cannot be reached. According to my judgment, as long as the gear pump is turning correctly and running, reverse flow will not occur.