Fluid-Tight Rotation-Guiding Device

A rotation-guiding device which comprises a fixed support and a movable support which is able to rotate around the fixed support about an axis of rotation, and an interface between the fixed and movable supports, which comprises:

• a bearing designed to guide the movable support in its rotation about the fixed support,
• a flexible dynamic seal designed to provide the seal-tightness between the fixed support and the movable support, mounted between a friction track secured to one of said supports and a mechanical structure secured to the other support, and which includes a metal spring intended to provide the contact force for the seal between the friction track and the mechanical structure, wherein the dynamic seal is mounted parallel to the axis of rotation, that is to say, so that the contact force is exerted parallel to the axis of rotation, and wherein the fixed support comprises spacers and the seal comprises oblongs distributed along the seal and intended to accommodate the spacers, to provide star-guidance for the seal.