Contactless labyrinth seal obtained by additive manufacturing

Contactless seal (1) for a rotating shaft (2) passing through an opening (3) of a wall (4), this seal (1) comprising a rotating member (6) intended to be carried by the shaft (2) and a fixed member (7) intended to be carried by the opening (3) of the wall, the rotating member (6) being slotted into the fixed member (7) while being mobile in rotation with respect to it, the rotating member (6) having an outer face (8) provided with at least one circumferential ridge (9a-9c) and the fixed member having an inner face (12) provided with at least one recess (14a-14c) or vice versa, each ridge (9a-9c) being partially engaged in a corresponding recess (14a-14c) such that the inner face (12) of the fixed member (7) and the outer face (8) of the rotating member (6) jointly delimit a labyrinthine leak route (16), characterised in that the rotating member (6) and the fixed member (7) are each formed from one single part, and in that the rotating member (6) and/or the fixed member (7) is obtained by additive manufacturing.