Sealing ring for a centrifugal separator

Claim 1

A sealing ring for insertion into an axially open annular groove in a first rotor part of a centrifugal separator, the centrifugal separator having a second rotor part movable relative to the first rotor part, the second rotor part having an abutment surface intended to be brought in and out of sealing abutment against a sealing surface of a sealing ring mounted in the groove, the sealing ring being pressed axially in a direction into the groove, the sealing ring comprising: a first annular portion adapted to be turned towards the second rotor part, the first annular portion in an unloaded condition having an outer radius, which is at least as large as an outer radius defined by a first annular portion of the groove, which is arranged to receive the first annular portion of the sealing ring; the first annular portion of the sealing ring having a radial width, which is at least as large as the radial width of a section of the first annular portion of the groove located closest to the second rotor part; the groove having a second annular portion turned away from the second rotor part, the second annular portion connecting to an axial end of the first annular portion of the groove and having an outer annular recess, which extends axially from axial end of the first annular portion of the groove radially outwardly from the outer radius of the first portion at the axial end, the groove having a bottom located in the second annular portion of the groove turned away from the second rotor part, sealing ring having a second annular portion turned away from the second rotor part, the second annular portion connecting to an axial end of the first annular portion of the sealing ring and having at least one projection, which at least partly fills up the outer annular recess in the second annular portion of the groove and abuts at least against an inner surface of the recess located closest to the axial end of the first annular portion when the sealing ring is mounted in the groove, the axial end of the first annular portion of the sealing ring and the axial end of the first annular portion of the groove being located at substantially the same axial level, the groove also has an inner annular recess, which extends axially from the bottom of the groove to an axial section spaced away from the bottom and radially inwardly from the inner radius of axial section at an end thereof turned away from the second rotor part, the sealing ring in mounted condition being located radially outside the inner annular recess, and wherein the inner annular recess is adapted upon elastic deformation of at least one of the first rotor part, the first annular portion of the sealing ring and the second annular portion of the sealing ring to enable the sealing ring to be turned in an inclined position in an axial cross-section to an insertion and removal direction, the maximum dimension perpendicular to this insertion and removal direction of the sealing ring being less than the minimum dimension of the groove perpendicular to this insertion and removal direction.