Device for Coating Substrates by Means of High-Velocity Flame Spraying

• US 20110265715A1
• Filed: 04/26/2011
• Published: 11/03/2011
• Est. Priority Date: 04/29/2010
• Status: Active Grant

• Current Assignee: AMT AG (OC Oerlikon Corporation AG)
• Original Assignee: AMT AG (OC Oerlikon Corporation AG)
• Inventors: Keller, Silvano
• Granted Patent: US 9,032,903 B2
• Time in Patent Office: Days
• US Class Current: 118/600
• CPC Class Codes: B05B 7/20 by flame or combustion
• CPC Class Codes: B05B 7/205 the material to be sprayed being originally a particulate material
• CPC Class Codes: B05B 7/208 the material to be sprayed being heated in a container
• CPC Class Codes: C23C 4/129 Flame spraying

Abstract

Proposed is a device for coating substrates by means of high-velocity flame spraying. The device comprises a combustion chamber (4), a first fuel feeder (L1) for feeding a liquid or gaseous fuel as well as at least one gas feeder for feeding an oxidative gas. The devise comprises furthermore a second fuel feeder (L5) for feeding a liquid or gaseous fuel as well as at least one further gas feeder for feeding a gas. Both the first gas feeder and the two fuel feeders (L1, L5) port into a common combustion chamber (4). In addition, means 24, 28 are provided for independent control of the fuel feed into the two fuel feeders (L1, L5).

Claims

1. A device for coating substrates by means of high-velocity flame spraying comprising:

a combustion chamber (4);

a first fuel feeder (L1) for feeding a first liquid or gaseous fuel;

a first gas feeder (L2) for feeding an oxidative gas; and

at least one further fuel feeder (L5) for feeding a further liquid or gaseous fuel,

characterized in that both the first gas feeder (L2) and the two fuel feeders (L1, L5) port into a common combustion chamber (4) and that means (24, 28) are provided for independent control of the fuel feed into the two fuel feeders (L1, L5).

2. The device as set forth in claim 1, characterized in that the one fuel feeder (L1) ports centrally via at least one outlet orifice (13A) into the combustion chamber (4) and that the first gas feeder (L2) ports into the combustion chamber (4) via a plurality of additional outlet orifices (19A).

3. The device as set forth in claim 1, characterized in that the one fuel feeder (L1) ports centrally via at least one outlet orifice (13A) into the combustion chamber (4) and that the further fuel feeder (L5) ports via a plurality of further outlet orifices (15A) into the combustion chamber (4).

4. The device as set forth in claim 3, characterized in that the outlet orifices (15A) of the further fuel feeder (L5) are arranged on a circle (16), said outlet orifices (15A) being arranged coaxially to the at least one outlet orifice (13A) porting centrally into the combustion chamber (4).

5. The device as set forth in claim 3, characterized in that the one fuel feeder (L1) ports centrally via at least one outlet orifice (13A) into the combustion chamber (4) and that the first gas feeder (L2) ports into the combustion chamber (4) via a plurality of additional outlet orifices (19A).

6. The device as set forth in claim 5, characterized in that the outlet orifices (15A) of the further fuel feeder (L5) are arranged on a circle (16), said outlet orifices (15A) being arranged coaxially to the at least one outlet orifice (13A) porting centrally into the combustion chamber (4).

7. The device as set forth in claim 5, characterized in that the outlet orifices (19A) of the first gas feeder (L2) are arranged on a circle (20) coaxial to the outlet orifice (13A) porting centrally into the combustion chamber (4).

8. The device as set forth in claim 1, characterized in that the device comprises:

adjoining the combustion chamber (4) a nozzle body (7) mounted replaceable in a connector body (2), the nozzle body (7) being provided with a plurality of outlet orifices (13A, 15A, 19A); and

the two fuel feeders (L1, L5) and the first gas feeder (L2) being connected to the nozzle body such that the media needed for operating the device are feedable via said outlet orifices (13A, 15A, 19A) of the nozzle body (7).

9. The device as set forth in claim 8, characterized in that the nozzle body (7) is provided with a central outlet orifice (13A) or nozzle and further outlet orifices (15A, 19A) are distributed circularly about the central outlet orifice (13A), said central outlet orifice (13A) or nozzle being connected to the first fuel feeder (L1) and said further outlet orifices (15A, 19A) being connected to at least one feeder (L3, L4) for feeding a further fuel and/or a further gas.

10. The device as set forth in claim 9, characterized in that the further outlet orifices (15A, 19A) are arranged along two circles (16, 20) differing in diameter, the outlet orifices (15A) arranged along the circle (16) being connected to an annular duct (14) recessed in the nozzle body (7) and the outlet orifices (19A) arranged along the circle (20) being connected to an annular duct (18) recessed in the nozzle body (7).

11. The device as set forth in claim 10, characterized in that the second annular duct (18) is connected to the first gas feeder (L2) for feeding an oxidative gas.

12. The device as set forth in claim 10, characterized in that the first annular duct (14) is connected to a further gas feeder (L4) for feeding an inert gas.

13. The device as set forth in claim 12, characterized in that the second annular duct (18) is connected to the first gas feeder (L2) for feeding an oxidative gas.

14. The device as set forth in claim 10, characterized in that the first annular duct (14) is connected to the further fuel feeder (L5) and/or to a further gas feeder (L3, L4).

15. The device as set forth in claim 14, characterized in that the first annular duct (14) is connected to a further gas feeder (L4) for feeding an inert gas.

16. The device as set forth in claim 14, characterized in that the second annular duct (18) is connected to the first gas feeder (L2) for feeding an oxidative gas.

17. The device as set forth in claim 1, characterized in that means (25, 26, 27) are provided to control the gas feed in at least some of the gas feeders (L2, L3, L4).

18. The device as set forth in claim 1, characterized in that the device comprises, defining the combustion chamber (4), a hollow body (3) inserted replaceable in a base body (1) of the device, that as viewed in the direction of flow of the gases a tubular nozzle (5) is inserted downstream of the hollow body (3) replaceable in the base body (1) and that the tubular nozzle (5) is provided with powder feed ports oriented substantially radially or at an angle to the longitudinal centerline.

19. The device as set forth in claim 1, characterized in that the device comprises for feeding the two fuels as well as the oxidative gas, adjoining the combustion chamber (4), a nozzle body (7) inserted replaceable in a connector body (2) of the device and provided with a central outlet orifice (13A) for the first fuel as well as two groups of outlet orifices (15A, 19A) for the further fuel as well as for the oxidative gas, the group of said further outlet orifices (15A) being arranged on an outer circle (16) and the other group of said outlet orifices (19A) being arranged on an inner circle (20).

20. The device as set forth in claim 19, characterized in that the two circles (16, 20) are arranged coaxial to the central outlet orifice (13A) and that the outlet orifice (13A) is connected to the first fuel feeder (L1) and the one group of said further outlet orifices (19A) is connected to the first gas feeder (L2) and that the other group of the further outlet orifices 15A is connected to the further fuel feeder (L5) as well as to at least one further feeder (L3, L4) for feeding a further gas.