Questions regarding dry gas seals
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I would like to ask everyone: in the documentation on dry gas seals, what components are the gap between, as indicated in the diagrams? Taking the single-end face dry gas seal as an example, could you help me indicate the direction of the gas in the diagram using arrows? Thank you so much! ! !
The dry gas seal gap is the space between the moving and stationary rings of the two seal faces. Sealing direction: process gas for sealing purposes. On the other end of the conventional design, there is isolating gas to separate the lubricating oil.
It was also found on Haichuan; hope it can help the original poster.
This is the first diagram; I’m not sure if it’s clear enough. Red represents the sealing gas, while orange represents the isolation gas. Their flow direction is indicated by the arrows in the diagram. The gap you’re referring to is the small opening that forms between the moving and stationary rings as the spindle rotates; in technical terms, this is called an “air film”. That’s it
I would like to ask again: what is the relationship between this gap and the axial displacement of the spindle (its play)? After all, this gap is only 3 to 5 micrometers, while the axial displacement can reach 1 millimeter.
Do both the stationary and rotating rings of the dry gas seal rotate together with the main shaft?