Porous rotating machine component, combustor and manufacturing method

Patent metadata

Field	Value
Publication number	US-2017299181-A1
Application number	US-201515510336-A
Country	US
Kind code	A1
Filing date	Sep 18, 2015
Priority date	Sep 30, 2014
Publication date	Oct 19, 2017
Grant date	—

Abstract

A rotating machine component, particularly a gas turbine combustion component, having at least one part built from a porous material with a plurality of pores, wherein at least a subset of the plurality of pores is at least partly filled with a gas with a composition different from air and/or with a powder, wherein the porous material is a laser sintered or laser melted material in which void local regions form the plurality of pores. The component counter-acts vibrations. A rotating machine or gas turbine engine may have such a component.

First claim

1 . A rotating machine component, comprising
at least one part built from a porous material comprising a plurality of pores, wherein at least a subset of the plurality of pores is at least partly filled with a gas with a composition different from air and/or with a powder.

2 . The rotating machine component according to claim 1 ,
wherein the porous material is a laser sintered or laser melted material in which void local regions form the plurality of pores.

3 . The rotating machine component according to claim 1 ,
wherein the porous material is metal foam.

4 . The rotating machine component according to claim 1 ,
wherein sizes and/or shapes of the plurality of pores and/or distribution of the plurality of pores over the at least one part is non-uniform.

5 . The rotating machine component according to claim 4 ,
wherein the sizes and/or the shapes of the plurality of pores and/or the distribution of the plurality of pores over the at least one part are selected to modify the Eigen frequencies of the rotating machine component.

6 . The rotating machine component according to claim 1 ,
wherein the pores are closed cavities without passages to an exterior of the part.

7 . The rotating machine component according to claim 1 ,
wherein the part comprises at least one cooling channel for guiding cooling fluid through the part to cool the part during operation.

8 . The rotating machine component according to claim 1 ,
wherein the gas having a composition comprising argon.

9 . The rotating machine component according to claim 1 ,
wherein during operation, the powder and/or the gas damp vibrations of the part.

10 . A combustor, comprising
a sheet like part, wherein the part is arranged as a rotating machine component according to claim 1 .

11 . A manufacturing method of a part of a rotating machine component, comprising:
building-up of the part as a porous structure by solidifying a base material
i) from metal foam which forms a plurality of pores or
ii) via laser sintering or laser melting, wherein the laser sintering or laser melting leaves void local regions to form a plurality of pores;
providing a gas with a composition different from air and/or with a powder during building-up of the part such that at least a subset of the plurality of pores is at least partly filled with the gas and/or the powder.

12 . The manufacturing method according to claim 11 ,
wherein building-up of the part via laser sintering or laser melting comprises:
generating instructions to a laser positioning control system such that pores with partly random shapes and/or random sizes and/or random distribution are generated.

13 . The manufacturing method according to claim 11 ,
wherein providing gas is performed by having the laser sintering or laser melting performed in a gas tight enclosure filled with the gas.

14 . The manufacturing method according to claim 11 ,
wherein providing powder comprises: generating instructions to a powder deposition control system such that it is selected from at least two different sources to provide particles for a consecutive layer for sintering of for melting, a first source providing the to be solidified particles and a second source providing the powder.

15 . The rotating machine component according to claim 1 ,
wherein the component comprises a gas turbine combustion component.

16 . The combustor according to claim 10 ,
wherein the combustor comprises a gas turbine engine.

17 . The combustor according to claim 10 ,
wherein the sheet like part comprises a combustion chamber liner.

18 . The manufacturing method according to claim 11 ,
wherein the rotating machine component comprises a gas turbine combustion component.

19 . The manufacturing method according to claim 12 ,
wherein the instructions are generated to a laser positioning control system such that pores with partly random shapes and/or random sizes and/or random distribution are generated, under evaluation of at least one of the following input parameters as input to the laser positioning control system: minimum pore size, maximum pore size.

Assignees

• Siemens Ag

Inventors

• Graichen Andreas
• Larfeldt Jenny
• Lörstad Daniel
• Munktell Erik

Classifications

• B22F3/1121

  by using decomposable, meltable or sublimatable fillers · CPC title

• F23R3/007

  constructed mainly of ceramic components · CPC title

• B22F7/006

  the porous part being obtained by foaming · CPC title

• F23R2900/00014

  Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators · CPC title

• B23K2101/001

  Turbines · CPC title