The dry gas seal of the turbine has a high leakage rate
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Why is the leakage rate at the first stage of the dry gas seal of the centrifugal compressor driven by the turbine so high? The leakage level remains above 20. The current medium is fresh hydrogen
Seal leaks heavily right after it starts operating? Did it rise later on?
Well, then has there been any change in the pressure of the gas leaking from the primary seal?
Yes, it also gets bigger, but not very noticeably
The flow rate at the undriven end of the secondary seal gas also increases on its own
It’s hard to say without a structural diagram; there are many reasons for this. It’s best to send the curve graph to the manufacturer through the central control system so that they can conduct an analysis
What are the common causes?
What I’ve encountered: wear of the comb teeth and increased gaps, leading to an increase in leakage from the primary seal. Also, there are weather variation factors. There’s also a sealing compensation mechanism, Kather, and so on; as the rotation speed increases, the leakage amount also changes
It dropped a bit; when it first dropped, air leaked out and that caused the drop, but now it’s gone up again