Seal segment assembly including mating connection for a turbomachine

Patent metadata

Field	Value
Publication number	US-10494940-B2
Application number	US-201715479442-A
Country	US
Kind code	B2
Filing date	Apr 5, 2017
Priority date	Apr 5, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A seal segment assembly for a turbomachine, in particular a gas turbine, including a first seal carrier and a second seal carrier, that are adjacently disposed in the circumferential direction, the first seal carrier having a first carrier base and at least one first sealing member that is joined to the first carrier base, and the second seal carrier having a second carrier base and at least one second sealing member that is joined to the second carrier base, the first sealing member and the second sealing member being formed by a plurality of cavities, that are adjacently disposed in the circumferential direction and in the axial direction, in particular evenly spaced, the cavities extending in the radial direction from the particular carrier base. The first carrier base and the second carrier base are intercouplable or are intercoupled in the circumferential direction by a mating connection assembly.

First claim

What is claimed is:

1. A seal segment assembly for a turbomachine, the seal segment comprising:
a first seal carrier and a second seal carrier adjacently disposed in a circumferential direction, the first seal carrier having a first carrier base and at least one first sealing member joined to the first carrier base, and the second seal carrier having a second carrier base and at least one second sealing member joined to the second carrier base, the first sealing member and the second sealing member being formed by a plurality of cavities adjacently disposed in the circumferential direction and in an axial direction, the cavities extending in a radial direction from the particular first or second carrier base, wherein the first carrier base and the second carrier base are intercouplable or are intercoupled in the circumferential direction by a mating connection assembly; wherein at least one mating element projects in the circumferential direction and is formed on the first carrier base, wherein at least one mating receptacle is formed on the second carrier base adapted for receiving the at least one mating element of the adjacent first carrier base, wherein the first and the second carrier base, the at least one first and second sealing member, and the mating connection assembly are additively manufactured, the first seal carrier including the first carrier base, the first sealing member and the at least one mating element being made as one piece and the second seal carrier including the second carrier base, the second sealing member and the at least one mating receptacle being made as one piece.

2. The seal segment assembly as recited in claim 1 wherein the plurality of cavities are adjacently evenly spaced.

3. The seal segment assembly as recited in claim 1 wherein, in the radial direction, a height of the first carrier base and of the second carrier base varies along the circumferential direction.

4. The seal segment assembly as recited in claim 3 wherein at at least one end in the circumferential direction, the first carrier base or the second carrier base has a greater radial height than in a middle region, as considered in relation to the circumferential direction.

5. The seal segment assembly as recited in claim 3 wherein an overall height in the radial direction of the particular first or second carrier base and of the particular first or second sealing member is essentially constant.

6. The seal segment assembly as recited in claim 1 wherein, in the radial direction of the first or second sealing member, a height of the first or second sealing member has a minimum value in a region of the mating connection assembly.

7. The seal segment assembly as recited in claim 1 wherein, on the first carrier base and on the second carrier base, at least one stiffening element is provided to extend from the respective first or second carrier base in the radial direction into the respective sealing member.

8. The seal segment assembly as recited in claim 1 wherein the cavities of the first and second sealing member are formed by interconnected webs, the webs being configured to form polygonal cavities in a plan view in the radial direction.

9. The seal segment assembly as recited in claim 1 wherein the first and the second carrier base, the at least one first and second sealing member, and the mating connection assembly are selectively laser melted.

10. The seal segment assembly as recited in claim 7 wherein the at least one stiffening element is produced by the additive manufacturing method.

11. The seal segment assembly as recited in claim 10 wherein the at least one stiffening element is produced by selective laser melting.

12. The seal segment assembly as recited in claim 10 wherein the first and the second carrier base, the at least one first and second sealing member, the mating connection assembly, and the at least one stiffening element are made of layers built up layer by layer.

13. The seal segment assembly as recited in claim 12 wherein the layers are adjacently disposed in the axial direction.

14. A gas turbine comprising:
at least one seal segment assembly as recited in claim 1 wherein the at least one seal segment assembly is associated with a stator vane ring, and the first and the second sealing members radially inwardly face a rotating rotor component.

15. The gas turbine as recited in claim 14 wherein the rotating rotor component is a shaft or a disk of a rotor blade ring, with sealing projections formed thereon.

16. An aircraft gas turbine comprising the gas turbine as recited in claim 14 .

17. An additive method for manufacturing the seal segment as recited in claim 1 .

18. The additive method as recited in claim 17 wherein the additive method includes selective laser melting.

19. The seal segment assembly as recited in claim 1 wherein the cavities are honeycomb- or diamond-shaped cavities.

20. The seal segment assembly as recited in claim 1 wherein the mating element has a rectangular shape.

21. The seal segment assembly as recited in claim 7 wherein the stiffening member is X-shaped.

Assignees

• MTU Aero Engines AG

Inventors

• Liebl Christian
• Schlothauer Steffen
• Jakimov Andreas
• Ladewig Alexander
• Blumenschein Karl
• Kraus Juergen

Classifications

• F05D2230/22

  by sintering · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• F05D2250/75

  given by its similarity to a letter, e.g. T-shaped · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · 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