US 12,234,743 B2
Method for manufacturing a blade for a gas turbine, turbine blade and gas turbine
Joerg Krueckels, Baden (CH); Ulrich Rathmann, Baden (CH); Willy Hofmann, Baden (CH); and Herbert Brandl, Baden (CH)
Assigned to Doosan Enerbility Co., Ltd., Changwon-si (KR)
Filed by DOOSAN ENERBILITY CO., LTD., Changwon-si (KR)
Filed on Nov. 28, 2023, as Appl. No. 18/522,215.
Claims priority of application No. 23170273 (EP), filed on Apr. 27, 2023.
Prior Publication US 2024/0360766 A1, Oct. 31, 2024
Int. Cl. F01D 5/18 (2006.01)
CPC F01D 5/187 (2013.01) [F05D 2230/21 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a blade for a gas turbine, the method comprising:
forming a blade body;
forming a groove in an outer surface of the blade body;
positioning a cover on the blade body such that it covers the groove and such that an outer surface of the cover forms a continuous surface with the outer surface of the blade body; and
joining the cover to the blade body so that the cover and the groove define a cooling channel,
wherein the cover includes a spacer protruding from an inner surface of the cover, and wherein positioning the cover on the blade body includes introducing the spacer into the groove so that the spacer contacts a bottom or a support surface of the groove to hold the outer surface of the cover in a position in which it forms a continuous surface with the outer surface of the blade body.