Wear protection arrangement for a turbomachine, process and compressor

Patent metadata

Field	Value
Publication number	US-2016010488-A1
Application number	US-201514792941-A
Country	US
Kind code	A1
Filing date	Jul 7, 2015
Priority date	Jul 8, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

The present invention relates to a wear protection arrangement for a turbomachine, comprising at least one adjustable guide vane, a casing in which the guide vane is arranged in an adjustable manner, an inner ring, made from a metallic material, in or on which the guide vane is arranged in an adjustable manner, a first gap between an inner guide vane tab and the inner ring and a second gap between an outer guide vane tab and the casing, at least one wear protection coating, wherein the wear protection coating(s) is/are connected to the inner ring and/or to the inner guide vane tab and the wear protection coating(s) forms or form the first gap, at least in certain regions, and/or the wear protection coating(s) is/are connected to the casing and/or to the outer guide vane tab and the wear protection coating(s) forms/form the second gap, at least in certain regions. The invention further relates to a method for applying an abradable wear protection coating and for applying an abrasive wear protection coating and to a compressor for a turbomachine having a wear protection arrangement.

First claim

1 .- 14 . (canceled)

15 . A wear protection arrangement for a turbomachine, wherein the arrangement comprises
at least one adjustable guide vane, a casing in which the at least one guide vane is arranged in an adjustable manner, an inner ring made from a metallic material, in or on which ring the at least one guide vane is arranged in an adjustable manner, a first gap between an inner guide vane tab and the inner ring and a second gap between an outer guide vane tab and the casing, one or more wear protection coatings connected to the inner ring and/or to the inner guide vane tab and forming the first gap, at least in certain regions, and/or one or more wear protection coatings connected to the casing and/or to the outer guide vane tab and forming the second gap, at least in certain regions.

16 . The wear protection arrangement of claim 15 , wherein the one or more wear protection coatings are abradable or abrasive.

17 . The wear protection arrangement of claim 16 , wherein the one or more wear protection coatings are abradable.

18 . The wear protection arrangement of claim 16 , wherein the one or more wear protection coatings are abrasive.

19 . The wear protection arrangement of claim 17 , wherein the one or more wear protection coatings are or comprise a porous metal matrix.

20 . The wear protection arrangement of claim 19 , wherein the metal matrix comprises at least one of aluminum, an aluminum-silicon alloy, nickel, a nickel-chromium-aluminum alloy.

21 . The wear protection arrangement of claim 19 , wherein a pore fraction of the porous metal matrix is from 3% to 35%.

22 . The wear protection arrangement of claim 20 , wherein a pore fraction of the porous metal matrix is from 3% to 35%.

23 . The wear protection arrangement of claim 17 , wherein the wear protection coating comprises a porous metal matrix and a solid lubricant.

24 . The wear protection arrangement of claim 23 , wherein the metal matrix comprises at least one of aluminum, an aluminum-silicon alloy, nickel, a nickel-chromium-aluminum alloy.

25 . The wear protection arrangement of claim 23 , wherein a pore fraction of the porous metal matrix is from 3% to 35%.

26 . The wear protection arrangement of claim 24 , wherein a pore fraction of the porous metal matrix is from 3% to 35%.

27 . The wear protection arrangement of claim 17 , wherein the wear protection coating has a thickness of from 0.1 mm to 2 mm.

28 . The wear protection arrangement of claim 18 , wherein the wear protection coating comprises a carbidic, nitridic and/or carbonitridic material.

29 . The wear protection arrangement of claim 18 , wherein the wear protection coating has a composition represented by (M1) a (M2) b N c C d , wherein N is nitrogen and C is carbon, M1 and M2 comprise at least one of aluminum, titanium, zirconium, chromium, tungsten, and the stoichiometric factors a, b, c, d are each zero, one, two, three or four, at least one of a, b, c, d being greater than zero.

30 . The wear protection arrangement of claim 29 , wherein the one or more wear protection coatings comprise one or more layers, multiple layers having the same or different compositions (M1) a (M2) b N c C d .

31 . The wear protection arrangement of claim 29 , wherein the one or more wear protection coatings comprise at least one metal matrix with embedded particles, which particles having a composition represented by (M1) a (M2) b N c C d , wherein N is nitrogen and C is carbon, M1 and M2 comprise at least one or aluminum, titanium, zirconium, chromium, tungsten, and the stoichiometric factors a, b, c, d are each zero, one, two, three or four, at least one of a, b, c, d being greater than zero.

32 . A method for applying one or more abradable wear protection coatings to the inner ring and/or the casing of the wear protection arrangement of claim 17 , wherein the method comprises applying the one or more wear protection coatings by thermal spraying.

33 . A method for applying one or more abrasive wear protection coatings to the inner guide vane tab and/or to the outer guide vane tab of the wear protection arrangement of claim 18 , wherein the method comprises applying the one or more wear protection coatings by thermal spraying, physical vapor deposition (PVD) or chemical vapor deposition (CVD).

34 . A compressor for a turbomachine, wherein the compressor comprises at least one wear protection arrangement according to claim 15 .

Assignees

• MTU Aero Engines AG

Inventors

• Albers Lothar
• Bock Stephan
• Schneiderbanger Stefan

Classifications

• F01D17/16 Primary

  by means of nozzle vanes · CPC title

• F05D2300/611

  Coating · CPC title

• F05D2300/228

  Nitrides · CPC title

• F05D2300/173

  Aluminium alloys, e.g. AlCuMgPb · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title