Turbomachine sealing ring

Patent metadata

Field	Value
Publication number	US-2019010820-A1
Application number	US-201816018441-A
Country	US
Kind code	A1
Filing date	Jun 26, 2018
Priority date	Jul 4, 2017
Publication date	Jan 10, 2019
Grant date	—

Abstract

A sealing ring for a turbomachine, in particular a compressor or turbine stage of a gas turbine is provided, the sealing ring having an, in particular at least partially honeycomb-like and/or integral, seal, in particular an abradable coating ( 13 ); a profile cross section of the sealing ring, which is in particular at least partially manufactured by a generative manufacturing process, varying in the circumferential direction, in particular at least in some regions uniformly and/or non-uniformly at one or more circumferential positions, in particular separation points.

First claim

1 - 13 . (canceled)

14 . A sealing ring for a turbomachine, the sealing ring comprising:
a seal; a profile cross section of the sealing ring varying in a circumferential direction.

15 . The sealing ring as claim 14 further comprising at least one radial rib extending circumferentially at least in some regions or at least one axial rib extending circumferentially at least in some regions.

16 . The sealing ring as recited in claim 15 wherein the axial rib is disposed on a radial flange or varies in dimension in the circumferential direction dimension, or the radial rib is disposed on a circumferential surface or varies in dimension in the circumferential direction.

17 . The sealing ring as recited in claim 16 wherein the axial rib varies in the axial or radial dimension.

18 . The sealing ring as recited in claim 16 wherein the radial rib is disposed on a circumferential surface in a circumferential groove for attachment of the sealing ring.

19 . The sealing ring as recited in claim 18 wherein the circumferential groove includes an undercut.

20 . The sealing ring as recited in claim 16 wherein the radial rib varies in the circumferential direction.

21 . The sealing ring as recited in claim 14 further comprising circumferentially spaced-apart supports disposed on a circumferential surface and adapted to radially retain bushings of a carrier of the sealing ring.

22 . The sealing ring as recited in claim 21 wherein the circumferential surface is in a circumferential groove for attachment of the sealing ring.

23 . The sealing ring as recited in claim 22 wherein the circumferential groove includes an undercut.

24 . The sealing ring as recited claim 21 further comprising at least one radial rib extending circumferentially at least in some regions and wherein the radial rib has the supports.

25 . The sealing ring as recited in claim 14 wherein the sealing ring is divided into at least two ring segments arranged in succession in the circumferential direction.

26 . The sealing ring as recited in claim 25 wherein at least one of the ring segments has at least two sub-segments arranged in succession in the circumferential direction and joined by material-to-material bonding or at least two facing end faces of circumferentially successive ring segments have different profiles.

27 . The sealing ring as recited in claim 26 further comprising at least one radial rib extending circumferentially at least in some regions or at least one axial rib extending circumferentially at least in some regions, wherein axial rib end faces have dissimilar dimensions or configurations, or wherein there are mutually aligned radial rib end faces.

28 . The sealing ring as recited in claim 26 wherein at least one end face of at least one of the sub-segments has at least one projection in the circumferential direction, the projection engaging into a cutback of an end face of an adjacent one of the sub-segments.

29 . The sealing ring as recited in claim 14 wherein the seal is a partial honeycomb or integral seal.

30 . The sealing ring as recited in claim 19 wherein the seal is an abradable coating.

31 . The sealing ring as recited in claim 14 wherein the sealing ring is at least partially manufactured by a generative manufacturing process.

32 . The sealing ring as recited in claim 14 wherein the sealing ring varies in the circumferential direction at separation points.

33 . An assembly for a turbomachine, the assembly comprising a stator ring and stator vanes arranged on the stator ring; and to which at least one sealing ring as recited in claim 14 is detachably, interlockingly or frictionally attached.

34 . The assembly as recited in claim 33 wherein the stator vanes are arranged adjustably on the stator ring.

35 . The assembly as recited in claim 33 wherein the sealing ring is attached on an opposite side.

36 . The assembly as recited in claim 33 wherein the stator ring has at least two stator ring segments arranged in succession in the circumferential direction, and wherein, in the circumferential direction, at least one end face of a stator ring segment and one end face of an adjacent ring segment of the segmented sealing ring overlap one another partially.

37 . The assembly as recited in claim 36 wherein the overlapping is axially or radially to lock against twisting.

38 . A compressor or turbine stage for a gas turbine comprising the assembly as recited in claim 33 .

39 . A gas turbine comprising at least one compressor or turbine stage as recited in claim 38 .

40 . An aircraft engine comprising the gas turbine as recited in claim 39 .

41 . A method for manufacturing the sealing ring as recited in claim 14 comprising at least partially manufacturing the sealing ring by a generative manufacturing process.

42 . The method as recited in claim 41 wherein the generative manufacturing process includes selective laser deposition.

Assignees

• MTU Aero Engines AG

Inventors

• Scherer Christian
• Eibelshaeuser Peter
• Schlothauer Steffen
• Jakimov Andreas
• Kraus Juergen

Classifications

• F05D2240/55

  Seals · CPC title

• F05D2230/60

  Assembly methods · CPC title

• F01D11/127

  with a deformable or crushable structure, e.g. honeycomb · CPC title

• F05D2230/22

  by sintering · CPC title

• F01D11/122 Primary

  with erodable or abradable material (blades having cutting or grinding tips F01D5/20) · CPC title