Flow machine for a fluid with a radial sealing gap

Abstract

A flow machine for a fluid is presented with a radial sealing gap (9) between stator parts (4) and a rotor (3), wherein at least one wear ring (5) is provided at the sealing gap and is fastened to a stator part (4) via an elastically deformable fastening part. The fastening part (6) is connected on the one side to the stator part (4). On this side a radial gap (8) is formed between an outer jacket surface of the wear ring and the fastening part and, on the other side, with the wear ring. On this side a radial gap (7) is formed between an outer jacket surface of the fastening part and the stator part.

Description

The invention will be explained more closely in the following with the help of the drawings, which show:

FIG. 1 a longitudinal section through a conventional flow machine for fluids,

FIG. 2 a detailed view of a specific embodiment of a flow machine in accordance with the present invention, and

FIG. 3 a detailed view of a second specific embodiment of a flow machine in accordance with the present invention.

Claims

1. A flow machine for a fluid with a radial sealing gap (9) between stator parts (4, 4a, b, c) and a rotor (3), with at least one wear ring (5) being provided at the sealing gap (9), characterised in that the wear ring (5) is fastened to one of the stator parts (4, 4a, b, c) via an elastically deformable fastening part (6), in that the fastening part (6) is connected to the stator part (4, 4a, b) on the one side and, on this side, a radial gap (8, 8′) is formed between an outer jacket surface of the wear ring (5) and the fastening part and in that the fastening part (6) is connected on the other side to the wear ring (5), with a radial gap (7) being formed on this side between an outer jacket surface of the fastening part and the stator part.

2. A flow machine in accordance with claim 1, wherein the fastening part (6) can be manufactured as a single part.

3. A flow machine in accordance with one of the claim 1, wherein the fastening part (6) is made rotationally symmetrical and/or has the shape of a bending beam in cross-section.

4. A flow machine in accordance with claim 1, wherein the fastening part (6) is connected with the stator part (4, 4a, b, c) by means of a shrink fit and/or a welded connection and/or a brazed connection and/or a screw connection.

5. A flow machine in accordance with claim 1, wherein the fastening part (6) is connected to the wear ring (5) by means of a shrink fit and/or wherein the wear ring is secured against displacement on the fastening part by means of screws.

6. A flow machine in accordance with claim 1, wherein the length of the radial gap (8, 8′) between the outer jacket surface of the wear ring (5) and the fastening part (6) and/or the length of the radial gap (7) between the outer jacket surface of the fastening part (6) and the stator part (4, 4a, b, c) are larger than the half length of the fastening part.

7. A flow machine in accordance with claim 1, wherein the material of the wear ring (5) has a thermal expansion coefficient α of less than 10×10−6/° C.

8. A flow machine in accordance with claim 1, wherein the wear ring (5) comprises a wear-resistant material and/or a ceramic material, for example of metal oxides, tungsten carbide or silicon carbide.