Flow machine for a fluid having a radial sealing gap and a stationary wear ring

摘要

A flow machine 10 for a fluid shown contains a radial sealing gap (9) which is formed between stator parts (4, 4a, 4b) and a closed impeller (3) of the flow machine, with at least one wear ring (5) arranged in a stationary manner being provided at the sealing gap and having an inner side facing the impeller, an outer side and two axially spaced apart side surfaces. A concentrically extending recess (6) in the form of a radial gap or of a radial incision is formed in the wear ring (5), with the recess 6, starting from one of the side surfaces, extending in the axial direction over more than a fifth of the axial length of the wear ring and with the wear ring (5) being produced from metal, hard metal or a ceramic material.

主权项

1. A flow machine for a fluid having a radial sealing gap which is formed between stator parts and a closed impeller, wherein the flow machine is designed for an operating pressure of more than 240 bar, with at least one wear ring arranged in a stationary manner being provided at the sealing gap and having an inner side facing the impeller, an outer side and two axially spaced apart side surfaces, characterized in that a concentrically extending recess is formed in the wear ring in the form of a radial gap or of a radial incision; in that the recess, starting from one of the side surfaces, extends in the axial direction over more than a fifth of the axial length of the wear ring; and in that the wear ring is produced from metal, hard metal or ceramic material, wherein the outer side of the wear ring is connected on the one side directly to the stator part and a radial gap whose axial length is larger than a fourth or larger than a third of the axial length of the wear ring is formed on the other side of the wear ring in the axial direction between it and the stator part.