For a high-speed pump with three-stage series sealing, how does the intermediate isolation fluid flow?
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The high-speed pump features a three-stage series sealing arrangement, with an isolation fluid used as the medium in between; however, there is no pumping ring on the mechanical seal. I wonder how the isolation fluid flows?
I don’t know why I can’t see the image; I’m sending it again. Is it just the flow channel based on the siphon principle of a siphon tank, with a siphon tank providing sealing in the middle? Wouldn’t that result in a very slow flow rate, preventing heat from being carried away?
I found information online; it’s the temperature difference that enables the circulation of the isolation fluid. Thank you for your support.
The temperature difference siphon effect is very small, and its effectiveness is much worse than that of forced circulation
Two-stage tandem mechanical seal, with the outer side lubricated by an isolation fluid, using the siphon principle!
The temperature difference-induced siphoning effect is very small, and its performance is much worse than that of forced circulation. I agree; there is no pumping ring on the rotating ring, so there’s nothing that can be done about it. The mechanical seal works fairly well, but it needs to be replaced every 1.5 years or so.