Safran Aircraft Engines

Arianegroup Sas

Cëdric Sene

François Danguy

Laurent Fabbri

Jean-Michel Nguyen Duc

Vincent Langlois

Laurent Paul Lattanzio Fabbri

A sealing system for at least one floatingly mounted ring in a support for a rotary shaft rotatable about an axis directed along a longitudinal direction provides dynamic sealing between the shaft and the support. The system includes a coupling part interposed between the ring and the support, whereby the ring is secured to the support. A first cylindrical type joint directed with respect to a first transverse direction provides a joint between the support and the coupling part. A second cylindrical type joint directed with respect to a second transverse direction perpendicular to the first transverse direction provides a joint between the ring and the coupling part. A turbopump includes such rotary shafts and sealing systems.

Sealing system and turbopump comprising such a system

The invention relates to the field of centrifugal pumps, and in particular it relates to a centrifugal pump () comprising at least: an impeller (); a rotary shaft () secured to said impeller (); a casing () having an axial admission passage (); at least one first bearing () supporting said rotary shaft () in said casing (); and at least one dynamic seal () around the rotary shaft (), the impeller () being situated between the at least one dynamic seal () and the axial admission passage () of the pump (). The centrifugal pump () also comprises, between the impeller () and at least one dynamic seal (), an axial force compensation disk () secured to the shaft () and presenting a diameter greater than 70% of a diameter of the impeller (). A front face () of the disk () faces towards the impeller () and is connected to a branch connection for fluid under pressure taken downstream from the pump (), and a rear face () faces towards the dynamic seals () and presents fins () that are oriented radially, at least in part.

Centrifugal pump, in particular for supplying power to rocket engines

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Rouen, France

Cëdric Sene