Oy Safematic Ltd.

Antti-Jussi Heilala

A slide ring seal for sealing a machine part which is rotatable with respect to a wall. The seal comprises seating rings provided with slide rings, the seating rings being so arranged with respect to each other that the sealing slide faces of the slide rings are pressed against each other and rotate with respect to each other. Each slide ring is fastened to its seating ring by means of a shrink fit in such a way that the slide ring is exposed to a radially-acting press force. In order to provide the slide face with a wave shape in the peripheral direction, an axial counter-surface of the seating ring, which in the shrink fit makes contact with an axial peripheral surface of the slide ring, is an axially discontinuous surface.

Slide ring seal with circumferentially variably-beveled counter-surface

A slide ring seal for sealing a gap between a rotatable and non-rotatable machine part. The seal comprises at least one static seal ring to be attached to the non-rotatable machine part and provided with a slide ring and at least one counter ring to be fastened to the rotatable machine part and provided with a slide ring. The static seal ring and the counter ring are thereby arranged to be fastened in such a way that the slide surfaces of the slide rings are tightly pressed against each other. In order to simplify the structure of the seal the counter ring and the static seal ring are mutually replaceable sealing modules.

Slide ring seal

A sealing flange for fastening a slide ring seal of a rotatable shaft to an unrotatable wall. The sealing flange includes an annular fastening element provided with fastening points for bolt fastening in the vicinity of the outer periphery thereof. The inner periphery of the fastening element includes a projection in which a counter surface for fastening a part of the slide ring seal is provided on a peripheral surface extending in the radial plane. In order to provide a simple fastening with advantageous manufacturing costs, the annular fastening element is a separate part. The projection is formed in a separate fitting ring fitted on the inner periphery of the fastening element.

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Starnberg, Germany

Antti-Jussi Heilala