Cooling device for a spraying nozzle or spraying nozzle assembly with a cooling device for thermal spraying

Patent metadata

Field	Value
Publication number	US-10166558-B2
Application number	US-201515127932-A
Country	US
Kind code	B2
Filing date	Mar 3, 2015
Priority date	Mar 21, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

The invention relates to a cooling device for a spraying nozzle, in particular for cold gas spraying, and to a spraying nozzle assembly equipped with such a cooling device. The spraying nozzle is surrounded by an enclosure forming the cooling device, wherein it is provided according to the invention that a cooling line within the enclosure forms a closed system which can be supplied with a cooling medium by way of an inlet and an outlet. The cooling medium therefore advantageously does not come into contact with the spraying nozzle, which is inserted into a receiving opening in the enclosure by means of a loose fit. The closure may also advantageously taper conically towards the mouth of the spraying nozzle, and therefore coatings can also be applied to difficultly accessible components by means of the spraying nozzle assembly according to the invention.

First claim

The invention claimed is:

1. A cooling device for a spraying nozzle which is suitable for thermal spraying, comprising:
a covering with an exterior surface and an inner space configured for arrangement of the spraying nozzle, wherein the covering is constructed from two half-shells and a separation line extends between the half-shells in a longitudinal direction of the covering,
an inlet and an outlet for a cooling fluid,
wherein the inner space of the covering is constructed as a fitting face in contact with the spray nozzle over at least two-thirds of a longitudinal extent of the covering, wherein when the spraying nozzle is assembled in the inner space a fit is formed between the spraying nozzle and the covering,
a lining for the fitting face of the covering, the lining providing an adaptor for dimensional differences between the covering and the spraying nozzle, and
a cooling line provided in the covering, the cooling line having a closed cross-section and connecting the inlet to the outlet,
a second cooling line, wherein each of the cooling lines feeds into a different one of the two half-shells, and
a second inlet and a second outlet, wherein each of the two half-shells is in communication with only one of the two inlets and only one of the two outlets.

2. The cooling device of claim 1 , wherein the lining compensates for thermal expansion differences between the spraying nozzle and covering.

3. The cooling device of claim 1 , wherein the inlet and the outlet are arranged at an end of the covering opposite a mouth of the fitted spraying nozzle.

4. The cooling device of claim 1 , wherein the covering comprises a frustoconical shape at an end located at a side of a mouth of the fitted spraying nozzle.

5. The cooling device of claim 1 , wherein:
the covering is constructed from an inner shell located inside an outer shell,
the inner shell has an outer covering face in which channels that form the cooling line are introduced, and
the outer shell is positioned on the outer covering face of the inner shell and closes a cross-section of the cooling line channels in an outward direction.

6. The cooling device of claim 1 , wherein at least a portion of the cooling line has a constant cross-section and extends in a meandering manner in the covering.

7. A spraying nozzle assembly, comprising:
a spraying nozzle, and
a cooling device comprising:
a covering with an exterior surface and an inner space in which the spraying nozzle is arranged, an inlet, and an outlet for a cooling fluid, wherein the covering is constructed from two half-shells and a separation line extends between the half-shells in a longitudinal direction of the covering,
wherein the inner space of the covering is constructed as a fitting face in contact with at least two-thirds of a longitudinal extent of the covering, wherein a fit is formed between the spraying nozzle and the covering in the inner space,
a lining for the fitting face of the covering, the lining providing an adaptor for dimensional differences between the covering and the spraying nozzle, and
a cooling line provided in the covering, the cooling line connecting the inlet to the outlet and having a closed cross-section within the covering,
a second cooling line, wherein each of the cooling lines feeds into a different one of the two half-shells, and
a second inlet and a second outlet, wherein each of the two half-shells is in communication with only one of the two inlets and only one of the two outlets.

8. The spraying nozzle assembly of claim 7 , wherein the spraying nozzle comprises a convergent/divergent cross-section path.

9. The spraying nozzle assembly of claim 7 , wherein the spraying nozzle assembly is produced from a ceramic material.

Assignees

• Siemens Ag

Inventors

• Arndt Axel
• Pyritz Uwe
• Stier Oliver

Classifications

• B05B7/16 Primary

  incorporating means for heating {or cooling} the material to be sprayed {(spraying by means of explosions B05B7/0006)} · CPC title

• B05B7/1486

  for spraying particulate material in dry state · CPC title