Device for hvof spraying process having a hot gas section insert

Patent metadata

Field	Value
Publication number	US-2018251900-A1
Application number	US-201815900784-A
Country	US
Kind code	A1
Filing date	Feb 20, 2018
Priority date	Oct 29, 2013
Publication date	Sep 6, 2018
Grant date	—

Abstract

The invention relates to a device for High Velocity Oxygen Fuel thermal spraying process for coating a component, especially a gas turbine component. The device includes a liquid fuel fired combustion chamber, a de-Laval section, a powder injector block with powder injectors and a barrel all arranged around and along an axis. The powder injector block includes at least four powder injectors arranged in an equal circumferential distance around the axis and an exchangeable hot gas section insert inside the powder injector block designed as a cylindrical bush with at least four openings, the openings being arranged in an equal circumferential distance around the axis in the cylinder, wherein the bush is fixed by the at least four powder injectors extending through said openings.

First claim

1 . Device for High Velocity Oxygen Fuel thermal spraying process for coating a component, comprising:
a liquid fuel fired combustion chamber, a de-Laval section, a powder injector block with powder injectors and a barrel all arranged around and along an axis (A), wherein the powder injector block having at least four powder injectors arranged in an equal circumferential distance around the axis (A) and an exchangeable hot gas section insert inside the powder injector block configured as a cylindrical bush with at least four openings, said openings being arranged in an equal circumferential distance around the axis (A) in the cylinder, wherein the bush is fixed by the at least four powder injectors extending through said openings.

2 . Device according to claim 1 , wherein the cylindrical bush comprises:
a guiding groove for a definite orientation of said bush around the axis (A) and that-the bush is inserted from the outside of the powder injector block.

3 . Device according to claim 1 , wherein the de-Laval section has a bell-shaped configuration.

4 . Device according to claim 3 , wherein the bell-shaped de-Laval section is combined with a cylindrical barrel.

5 . Device according to claim 3 , wherein the bell-shaped de-Laval section is combined with a conical barrel.

6 . Device according to claim 5 , wherein the bell-shaped de-Laval section is combined with a full conical configuration of the powder injector block.

7 . Device according to claim 1 , in combination with a gas turbine component, the device being arranged for coating the gas turbine component.

8 . Device according to claim 1 , in combination with metallic protective coatings of the MCrAlY type for performance of a spraying process.

Assignees

• Ansaldo Energia Ip Uk Ltd

Inventors

• Olliges Sven
• Nivokazi Jeton
• Zoller Benjamin-Timo
• Haarnagel Uwe
• Geng Weiqun

Classifications

• F05D2220/32

  in gas turbines · CPC title

• B05C19/008

  Accessories or implements for use in connection with applying particulate materials to surfaces; not provided elsewhere in B05C19/00 · CPC title

• F01D5/288

  Protective coatings for blades · CPC title

• B05B7/205 Primary

  the material to be sprayed being originally a particulate material · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title