Apparatus for applying cold-spray to small diameter bores

• US 20070181714A1
• Filed: 02/07/2006
• Published: 08/09/2007
• Est. Priority Date: 02/07/2006
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Payne, David
• Granted Patent: US 7,959,093 B2
• Time in Patent Office: Days
• US Class Current: 239/589
• CPC Class Codes: A62C 31/02 Nozzles specially adapted for fire-extinguishing
• CPC Class Codes: C23C 24/04 Impact or kinetic deposition of particles
• CPC Class Codes: C23C 4/16 Wires; Tubes

Abstract

A nozzle is provided for use during a process for cold-dynamic gas spraying a powder material onto a bore surface. In one embodiment, and by way of example only, the nozzle includes a tube and a coating. The tube is configured to direct the powder material to the bore surface and has an inner surface, an axial section, a radial section, and a bend. At least a portion of the inner surface of the axial section defines a converging/diverging flowpath, and the axial section and the radial section are disposed at a predetermined angle relative to one another and include the bend disposed therebetween. The coating is disposed on at least a portion of the tube inner surface and comprises a material to which the powder material does not adhere.

Claims

1. A nozzle for use during a process for cold-dynamic gas spraying a powder material onto a bore surface, the nozzle comprising:

a tube configured to direct the powder material to the bore surface, the tube having an inner surface, an axial section, a radial section, and a bend, at least a portion of the inner surface of the axial section defining a converging/diverging flowpath, the axial section and the radial section disposed at a predetermined angle relative to one another and including the bend disposed therebetween; and

a coating disposed on at least a portion of the tube inner surface, the coating comprising a material to which the powder material does not adhere.

2. The nozzle of claim 1, wherein the coating is disposed on the inner surface proximate the bend.

3. The nozzle of claim 1, wherein the coating comprises an elastomeric material.

4. The nozzle of claim 3, wherein the elastomeric material comprises a material selected from the group consisting of silicone, rubber, polytetrafluoroethylene, latex, urethane, and plastic.

5. The nozzle of claim 1, wherein the tube comprises a material and the coating comprises material that when impinged by the powder material during the cold-gas dynamic spraying process is more resistant to erosion than the tube material.

6. The nozzle of claim 5, wherein the coating material comprises a material selected from the group consisting of ceramic, glass, metal, and chrome.

7. The nozzle of claim 1, wherein the predetermined angle is substantially 90 degrees.

8. The nozzle of claim 1, wherein:

the bore surface defines a bore having a diameter;

the tube includes an inlet and an outlet; and

a radial distance between the inlet and the outlet is less than the bore diameter.

9. A nozzle for use during a process for cold-dynamic gas spraying a powder material onto a bore surface, the nozzle comprising:

a first tube configured to direct the powder material to the bore surface, the first tube having an inner surface, an axial section, a radial section, and a bend, at least a portion of the inner surface of the axial section defining a converging/diverging flowpath, the axial section and the radial section disposed at a predetermined angle relative to one another, the bend disposed between the axial and radial sections and including an outer section;

an opening formed through the first tube on the bend outer section; and

a gas jet in communication with the opening and configured to direct a stream of gas at a predetermined velocity and direction therethrough to divert the powder material traveling in an axial direction to a radial direction.

10. The nozzle of claim 9, further comprising a coating disposed on at least a portion of the first tube inner surface, the coating comprising a material to which the powder material does not adhere.

11. The nozzle of claim 10, wherein the coating comprises an elastomeric material.

12. The nozzle of claim 9, wherein:

the bore surface defines a bore having a diameter;

the first tube includes an inlet and an outlet; and

a radial distance between the inlet and the outlet is less than the bore diameter.

13. The nozzle of claim 9, further comprising a second tube coupled between the gas jet and the opening, the second tube configured to provide a flowpath along which the stream of gas travels.

14. The nozzle of claim 9, further comprising:

a plurality of openings formed through the first tube on the bend outer radial portion; and

wherein the gas jet is further configured to direct streams of gas at a predetermined velocity and direction through the plurality of openings to divert the powder material traveling in an axial direction to a radial direction.

15. The nozzle of claim 14, further comprising:

a plurality of gas jets in communication with the plurality of openings.

16. The nozzle of claim 9, wherein the predetermined angle is substantially 90 degrees.

17. A nozzle for use during a process for cold-dynamic gas spraying a powder material onto a bore surface, the nozzle comprising:

a tube configured to direct the powder material to the bore surface having an inlet, an outlet disposed substantially in alignment with the inlet, and a flowpath therebetween;

a deflector disposed proximate the tube outlet and disposed at an angle relative to the flowpath to thereby divert a direction in which the powder material travels along the flowpath such that the powder material impinges the bore surface at an angle of about 90 degrees; and

a coating disposed on at least a portion of the deflector, the coating comprising a material to which the powder material does not adhere.

18. The nozzle of claim 17, wherein the coating comprises an elastomeric material.

19. The nozzle of claim 17, wherein the tube comprises a material and the coating comprises material that when impinged by the powder material during the cold-gas dynamic spraying process is more resistant to erosion than the tube material.

20. The nozzle of claim 19, wherein the coating material comprises a material selected from the group consisting of ceramic, glass, metal, and chrome.