Rotor and turbomachine comprising the rotor

Patent metadata

Field	Value
Publication number	US-12326090-B2
Application number	US-202218682900-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	Aug 24, 2021
Publication date	Jun 10, 2025
Grant date	Jun 10, 2025

Abstract

A sealing ring for a turbomachine, having at least a first and a second segment. The first segment has, in a region of a first longitudinal end, a first recess and a first projection having a first flank which delimits the first recess. The second segment has, in a region of a second longitudinal end, a second recess and a second projection having a first flank which flank delimits the second recess. The first and second segments have a coupling state in which they are movable relative to one another. The first projection is arranged in the second recess, the second projection is arranged in the first recess, and the first flank of the first projection and the first flank of the second projection are designed to abut one another upon a first movement of the first segment away from the second segment and to limit the first movement.

First claim

The invention claimed is:

1. A rotor for a turbomachine, comprising:
a rotor disk, which has a plurality of rotor blades arranged in a ring circumferentially,
wherein each of the plurality of rotor blades comprise a blade platform with a platform overhang, an underside of which overhang faces an end face of the rotor disk,
wherein a cover ring is arranged on the end face of the rotor disk and radially inside the underside, with a receiving groove opening radially outward and extending in a circumferential direction, in which receiving groove a sealing ring is arranged for sealing a radial gap between the underside and the cover ring,
wherein the sealing ring comprises at least a first segment and a second segment, which each have a first longitudinal end with respect to a circumferential direction of the sealing ring and a second longitudinal end with respect to the circumferential direction,
wherein the first segment has, in a region of the first longitudinal end, a first recess and a first projection with a first flank of the first projection delimiting the first recess in the circumferential direction and the second segment has, in a region of the second longitudinal end, a second recess and a second projection with a first flank of the second projection delimiting the second recess in the circumferential direction, and
wherein the first segment and the second segment have a coupling state in which the first segment and the second segment can be displaced relative to one another in the circumferential direction and the first projection is arranged in the second recess, the second projection is arranged in the first recess and the first flank of the first projection and the first flank of the second projection are designed, when the first segment is displaced away from the second segment, to abut one another for the first time and thus to limit a first displacement.

2. The rotor as claimed in claim 1 ,
wherein the first recess in the circumferential direction is longer than the second projection in the circumferential direction and the second recess in the circumferential direction is longer than the first projection in the circumferential direction.

3. The rotor as claimed in claim 1 ,
wherein the first recess has an end face of the first recess and the second projection has an end face of the second projection,
wherein the end face of the first recess delimits the first recess in an axial direction with respect to the sealing ring, the end face of the second projection delimits it the second projection in the axial direction,
wherein in the coupling state the end face of the first recess and the end face of the second projection are arranged facing one another and delimit a first sealing gap.

4. The rotor as claimed in claim 1 ,
wherein the second recess has an end face of the second recess and the first projection has an end face of the first projection,
wherein the end face of the second recess delimits the second recess in an axial direction with respect to the sealing ring, the end face of the first projection delimits the first projection in the axial direction,
wherein in the coupling state the end face of the second recess and the end face of the first projection are arranged facing one another and delimit a second sealing gap.

5. The rotor as claimed in claim 1 ,
wherein the first segment has a first recess flank, which delimits the first recess in the circumferential direction, and the second projection has a second flank of the second projection,
wherein in the coupling state the first recess flank and the second flank of the second projection are designed, upon a second displacement of the first segment toward the second segment, to abut one another and thus to limit the second displacement.

6. The rotor as claimed in claim 5 ,
wherein the second flank of the second projection and the second longitudinal end coincide.

7. The rotor as claimed in claim 1 ,
wherein the second segment has a recess radial delimitation comprising a radially outward facing surface, which radially outward facing surface delimits the second recess in a radial direction with respect to the sealing ring,
wherein in the coupling state the first projection and the recess radial delimitation delimit a third sealing gap.

8. The rotor as claimed in claim 1 ,
wherein the second segment has a circumferential projection protruding in the circumferential direction and the first segment has a receptacle in which the circumferential projection is arranged in the coupling state.

9. The rotor as claimed in claim 1 ,
wherein the sealing ring has a T-shaped profile.

10. The rotor as claimed in claim 1 ,
wherein all the segments are identical.

11. The rotor as claimed in claim 1 ,
wherein all segments each have, in the region of the first longitudinal end, the first recess and the first projection with the first flank of the first projection delimiting the first recess and, in the region of the second longitudinal end, the second recess and the second projection with the first flank of the second projection delimiting the second recess,
wherein the sealing ring has an assembly state in which all pairs comprising the first segment and the second segment which are arranged adjacent in the circumferential direction are arranged in the coupling state.

12. A turbomachine, comprising:
the rotor as claimed in claim 1 .

13. The turbomachine as claimed in claim 12 ,
wherein the sealing ring is designed to seal a cooling air and/or a sealing air in the turbomachine.

14. The rotor as claimed in claim 1 ,
wherein the first segment and the second segment are formed by respective separate bodies; and
wherein the sealing ring is a composite sealing ring comprising the first segment and the second segment.

15. The rotor as claimed in claim 1 ,
wherein the at least a first segment and a second segment comprises a plurality of the first segments and a plurality of the second segments;
wherein in an assembly state the sealing ring comprises a plurality of pairs arranged end to end circumferentially, wherein each pair comprises a respective first segment of the plurality of first segments and a respective second segment of the plurality of second segments.

16. The rotor as claimed in claim 1 ,
wherein in an assembly state the sealing ring is free of an internal resilience that biases the sealing ring radially outward onto the underside of the overhang.

Assignees

• Siemens Energy Global Gmbh & Co Kg

Inventors

• Schröder Peter
• Springborn Dirk
• Kolk Karsten

Classifications

• F05D2240/55

  Seals · CPC title

• F01D5/02

  Blade-carrying members, e.g. rotors (rotors of non-bladed type F01D1/34; stators F01D9/00 {; selecting particular materials F01D5/28}) · CPC title

• F16J15/08

  with exclusively metal packing · CPC title

• F01D5/3007

  of axial insertion type · CPC title

• F01D5/3015

  with side plates · CPC title