Commissariat a L'energie Atomique Et Aux Energies Alternatives

Technetics Group France Sas

Olivier Constant

Michel Lefrancois

Laurent Guimet

Jean-François Juliaa

Christophe Darles

Frédéric Sauvinet

Philippe Reynaud

Christophe Mengelle

A metallic sealing assembly between a rotating shaft and a fixed frame comprises: a flexible metallic seal having two tori, inner and outer, that are concentric and of different average diameters, comprising a metal envelope which encases and holds the inner and outer tori; a shaft rotating about an axis of rotation, comprising an annular shoulder against which the seal comes to press; a counter-face, comprising a contact face against which the seal comes to press; a wedge block positioned around the rotating shaft such that the seal is held between the wedge block and the contact face, the wedge block mounted to slide on the rotating shaft; a metal part which forms a cap through which the rotating shaft passes and which is secured to the frame and/or to the counter-face, the rotating shaft being free to rotate with respect to the cap and axially secured to the cap.

Metallic sealing assembly for sealing between a rotating shaft and a fixed frame

The seal comprises a casing made of two portions () crimped into one another with an accurate hermetic position adjustment at interfaces () and a composite structure comprising inside the casing an advantageously flexible and resilient core () and a winding () of brush bristles. This structure directly extends facing internal faces () facing each other in the casing, which compresses the same and has an arcuate shape having a slightly higher radius of curvature. The composite structure is held at an accurate position, firmly but free of constraint.

Brush-type circular seal

Growing community of inventors

Saint Jean Bonnefonds, France

Olivier Constant