US 12,612,970 B2 · Hard sealing ring having an anti-friction surface, anti-friction sealing device, and production method

Abstract

The present disclosure relates to a hard sealing ring with an annular body which has a rotationally symmetrical basic shape with respect to an axis. The annular body has, in a cross section which lies in the direction of the axis, a contact portion which is arranged on an end face of the annular body. The contact portion points outwards in the direction of the axis. Furthermore, the annular body has a trough portion in the cross section, which is arranged on a radial lateral surface of the annular body and faces away from the contact portion with respect to the direction of the axis. The annular body has an anti-friction coating on the contact portion, which is in particular formed in one or more layers. The disclosure further relates to an anti-friction hard sealing device comprising a first hard sealing ring and a second hard sealing ring, each having a contact portion, the hard sealing rings being arranged adjacent to and coaxial with each other along the axis in the intended mounting position, so that the contact portions contact each other circumferentially.

Claims55

Dependent claims

A hard sealing ring, comprising an annular body which has a rotationally symmetrical basic shape with respect to an axis, wherein

the annular body has, in a cross section which lies in a direction of the axis, a contact portion which is arranged on an end face of the annular body, the contact portion pointing outwards in the direction of the axis, and wherein
the annular body has a trough portion in the cross section, which is arranged on a radial lateral surface of the annular body and faces away from the contact portion with respect to the direction of the axis, wherein
the annular body has an anti-friction coating on the contact portion,
characterized in that
the annular body is produced by shaping from a cut-to-length starting material which is bent into an annular shape and joined at the ends, wherein
the annular body has a band collar in the cross section at the trough portion towards a side of the contact portion, wherein a protective coating is provided on the annular body in a radial surface portion which lies between, on the one hand, the trough portion and, on the other hand, the contact portion, in particular on a radial circumferential surface of the band collar.

3 more elements

A hard sealing ring, comprising an annular body has a rotationally symmetrical basic shape with respect to an axis, wherein

the annular body has, in a cross section which lies in the direction of the axis, a contact portion which is arranged on an end face of the annular body, wherein the contact portion points outwards in the direction of the axis, and wherein
the annular body has a trough portion in cross section, which is arranged on a radial lateral surface of the annular body and faces away from the contact portion with respect to the direction of the axis, wherein
the annular body has an anti-friction coating on the contact portion,
characterized in that
a surface portion which is limited in the axial direction is provided on the trough portion and covers only a part of the trough portion, this surface portion having an increased adhesion-promoting effect with respect to a soft sealing ring which can be placed there, in particular due to the presence of an adhesion-promoting supplementary material and/or due to the presence of an adhesion-promoting surface structure;
and in that
a protective coating is provided on the annular body in a radial surface portion which lies between, on the one hand, the trough portion and, on the other hand, the contact portion.

4 more elements

Dependencies are inferred from the claim text.

Hard sealing ring having an anti-friction surface, anti-friction sealing device, and production method

Life of this patent

Hard sealing ring having an anti-friction surface, anti-friction sealing device, and production method

Life of this patent

Abstract

Claims55