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1. WO2020136020 - COOLABLE COMPONENT FOR A STREAMING ENGINE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

Patent claims

1. Coolable component (1) for a streaming engine,

wherein the coolable component (1) comprises an outer wall (6, 6’’’’, 6’’’’’) providing an outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) adapted to be in contact with a hot flu-id like a hot gas stream used in the streaming engine or to be coated with a coating (9, 9’’’’) that is adapted to be in contact with the hot fluid,

wherein the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) is at least partially curved,

wherein the coolable component (1) comprises at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) inside the outer wall (6, 6’’’’, 6’’’’’) adapted to guide a cooling flu-id through said at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) to cool the outer wall (6, 6’’’’,

6’’’’’) during operation of the streaming engine,

wherein the at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) is adapted to provide a convection cooling of the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’),

wherein at least 13 % of the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) is located above the at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) and provides a dis-tance (7,
’’’’, 7’’’’’) between the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) and at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) of at least 7 % of the to-tal thickness (8, 8’’’’, 8’’’’’) of the outer wall (6, 6’’’’, 6’’’’’) measured along a straight line being perpendicular to the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) and being at least 0.2 mm, and

wherein at least 60 % of the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) provides a distance to the at least one cool-ing channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) of at most 3 mm.

2. Coolable component (1) according to claim 1, wherein the at least one cooling channel provides a surface area in a cross section perpendicular to the direction of the at least one cooling channel of at least 20 % of t2, wherein t is the average thickness of the outer wall measured perpendicular to the outer surface.

3. Coolable component (1) according to any of claims 1 to 2, wherein at least 60 % of the outer surface provides a dis-tance to the at least one cooling channel of at most 0.9 mm.

4. Coolable component (1) according to any of claims 1 to 3, wherein the at least one cooling channel provides a chang-ing pitch, a changing form in a cross section perpendicular to the direction of the flow of the cooling liquid, different lengths of the cooling channels, or combinations thereof

5. Coolable component (1) according to any of claims 1 to 4, wherein at least a part of the film holes like at least 50 % are not connected to the inventive cooling channels

6. Coolable component (1) according to any of claims 1 to 5, wherein the at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) provides a surface area in a cross sec-tion perpendicular to the direction of the at least one cool-ing channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) of at most 120 % of t2, wherein t is the average thickness (8, 8’’’’,

8’’’’’) of the outer wall (6, 6’’’’, 6’’’’’) measured perpen-dicular to the outer surface (2, 2’, 2’’, 2’’’, 2’’’’,

2’’’’’). ………………

7. Coolable component (1) according to any of claims 1 to 6, wherein the at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) is adapted to provide a flow of the cooling fluid being essentially parallel to the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’).

8. Coolable component (1) according to any of claims 1 to 7, wherein at most 5 % of the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) located above the at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) provides a distance (7, 7’’’’, 7’’’’’) between the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) and at least one cooling channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) of at most 3 % of the total thick-ness (8, 8’’’’, 8’’’’’) of the outer wall (6, 6’’’’, 6’’’’’) measured along a straight line being perpendicular to the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’).

9. Coolable component (1) according to any of claims 1 to 8, wherein at least 13 % of the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) is located above the at least one cool-ing channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) and provides a distance ( 7, 7’’’’, 7’’’’’) between the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’) and at least one cooling chan-nel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) of at most 3 mm and at most 35 % of the total thickness (8, 8’’’’, 8’’’’’) of the outer wall (6, 6’’’’, 6’’’’’) measured along a straight line being perpendicular to the outer surface (2, 2’, 2’’, 2’’’, 2’’’’, 2’’’’’).

10. Coolable component (1) according to any of claims 1 to 9, wherein the coolable component (1) is selected from tur-bine blades like guide vanes or rotor blades or heat shields for a streaming engine.

11. Streaming engine containing a coolable component (1) ac-cording to any of claims 1 to 10.

12. Method of manufacturing a coolable component (1) accord-ing to any of claim 1 to 10 comprising the step of providing an outer wall (6, 6’’’’, 6’’’’’) including the at least cool-ing channel (3, 3’, 3’’, 3’’’, 3’’’’, 3’’’’’) inside the out-er wall.

13. Method according to claim 12, wherein the step of providing the outer wall (6, 6’’’’, 6’’’’’) is performed us-ing additive manufacturing.

14. Method according to any of claim 12 to 13, wherein the outer wall (6, 6’’’’, 6’’’’’) containing the cooling channels is manufactured upon an existing base being produced sepa-rately using preferably conventional means of manufacturing.

15. Use of a coolable component (1) according to any of claims 1 to 10 as replacement of different or used coolable components in a streaming engine.