Issues regarding dry gas seal displacement
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I would like to ask: since the displacement of a typical compressor is around 0.25 mm, what is the state of the dry gas seal when we adjust the shaft displacement? Is it the spring inside that gets compressed? Is it still the dry gas seal that remains fixed, or is it the O-ring at the innermost part of the dry gas seal that shifts relative to the shaft?
Of course, it’s the elastic element that provides compensation, that is, the spring
"It is impossible for the O-ring at the innermost part of the dry gas seal to shift relative to the shaft; the set screw on the outside of the shaft sleeve already fixes the dry gas seal shaft sleeve to the compressor rotor, and it is the spring that undergoes axial deformation to provide compensation in such a situation.
You’re absolutely right; how could I forget to tighten the lock nut outside the dry gas seal? Thank you!