Drehdurchführung für wechselnde Medien

摘要

The medium is conveyed from a stationary (3) to a rotary machine part (1) A first seal (7) is in the form of two superimposed, sliding, smooth, and circular slide sealing surfaces (4,6) which are concentric with the rotational axis (10) of the rotary machine part. The sealing surfaces are movable axially apart so that they are no longer in contact with each other while the rotary machine part is turning. An extra seal (17) has sealing surfaces formed by cylinder casing surfaces (14,16) concentric with each other with a narrow sealing gap.