A new [1] zero-leakage film riding mechanical face seal is presented. The seal serves as a static-contacting seal while the machine shaft is in stand-still and turns into a film riding dynamic seal by lifting off the rotor surface to a few micro-meters gap once motion has begun. The dynamic sealing as well as lifting capabilities stem from inter-connected hydro-dynamic bearings which are circumferentially distributed around the annular stator face. Approximate calculations together with preliminary experimental results are shown and analyzed.
Issue Section:
Research Papers
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