Multipart packing ring

Abstract

In pressure packings for sealing a piston rod of a compressor, a combination of a radially cut and a tangentially cut packing ring is generally used. These two interacting packing rings must in this case be prevented from rotating relative to one another in order to ensure that the wear gaps are covered by the other ring in each case. The rotation prevention means is generally a pin which is placed in both rings. However, owing to the resulting differing wear to the radially cut and the tangentially cut packing ring, the rotation prevention pins are subjected to shear stress which can cause the pins to break. In order to avoid that, pressure packings are proposed which have individual packing rings and have to be specially cut for this purpose. The present invention describes a packing ring of this type that is distinguished by especially low wear to the ring segments and a long service life associated therewith. The packing ring 11 has for this purpose at the point of the greatest wear, at the centre of the segment, the greatest material thickness, in that a sealing segment 14 of the packing ring 11 is widened in the axial direction in this region by an axial projection 24.

Description

technical field [0001] The invention relates to a multi-part sealing ring comprising a plurality of segments and a plurality of sealing segments, which are arranged closely against one another and form a ring and have a radially inner curved circumferential surface, wherein the segment segments extend in the circumferential direction Both ends are delimited by radially first end faces, and an axially protruding shoulder is provided on the segment in the radially outer region, which is delimited radially inwardly by tangential sealing surfaces. The invention also relates to a pressure seal and a sealing arrangement comprising such a multi-part sealing ring. Background technique [0002] Piston compressors, especially of double-acting construction, require sealing of the crank-side compression chamber along the reciprocating piston rod 5 in the cylinder, where there is a time-varying (high) cylinder pressure P zyl . Typically must be relative to the (low) ambient pressure p ...

AI Technical Summary

Problems solved by technology

Such a non-uniform wear rate also results in an ever more reduced pressure per unit area between the tangential sealing surfaces until, after a longer or shorter period of time, an adequate sealing action is no longer provided and leakage through the seal ring becomes unacceptably large

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