Sealing device with closure system for compressor
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation
InventorsRoger Louis Elysee Germain, Claude Eugene Desire Duquenne
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Abstract
The device comprises a driving mechanism, disconnectable coupling means, a otor in which is conveyed a toxic gas, and an annular seal clamped between stationary knife-edges on the rotor and movable knife-edges associated with a movable annular support unit. A closure control element consisting of an annular jack causes the annular support unit to move between an inactive position and an active position and conversely. A second control element consisting of a resilient washer applies a complementary force to the annular support unit under the action of withdrawal of the driving mechanism.
Claims8
A sealing device with closure system for a rotary machine having a vertical axis of rotation, comprising a driving mechanism, disconnectable coupling means and a rotor in which a noxious fluid is conveyed, an annular seal in a plane at right angles to said axis of rotation and clamped between stationary knife-edges on an annular support unit moving along said axis, two closure control means operated successively, the first of said control means effecting the displacement of said annular support unit between an inactive position and an active position and conversely actuated externally of the machine and the second of said control means exerting a complementary effort on said annular support unit upon withdrawal of said driving mechanism, said second control means being a resilient member applied on one side against a ring retaining said annular support unit and applied on the other side against a ring rigidly fixed to said driving mechanism in an inactive position and against a stop integral with said rotor in an active position.
Dependencies are inferred from the claim text.