Turbine blade comprising a cooling structure and associated production method

Patent metadata

Field	Value
Publication number	US-11073022-B2
Application number	US-201716083989-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 31, 2016
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A turbine blade has a blade tip, a cooling structure with cooling channels which are designed to have cooling fluid passed through them in order to cool the turbine blade during operation, an end section at a lower level than that of the blade tip, and an outer wall section extending up to the blade tip. The cooling structure is formed between the end section and the blade tip. A method produces a cooling structure of this type.

First claim

The invention claimed is:

1. A turbine blade, comprising:
a blade tip,
a cooling structure comprising a multiplicity of cooling ducts which are configured to have a cooling fluid flowing through them during operation in order to cool the turbine blade, wherein the cooling structure comprises a lattice structure which forms the multiplicity of cooling ducts,
an end portion that is recessed with respect to the blade tip, and
an outer wall portion which:
projects from the end portion; and
terminates at and defines the blade tip,
wherein the end portion and the outer wall portion bound a region that is recessed in the blade tip, and wherein the cooling structure fills an entirety of the region.

2. The turbine blade as claimed in claim 1 , wherein diameters of cooling ducts of the multiplicity of cooling ducts are between 0.1 mm and 1 mm.

3. The turbine blade as claimed in claim 1 ,
wherein cooling ducts of the multiplicity of cooling ducts that are fluidically separated from one another.

4. The turbine blade as claimed in claim 1 , wherein the end portion comprises cooling-air bores.

5. The turbine blade as claimed in claim 1 ,
wherein the cooling structure is formed at least partially in the outer wall portion, and
wherein an outlet of cooling ducts of the multiplicity of cooling ducts leads into the blade tip.

6. The turbine blade as claimed in claim 1 ,
wherein the outer wall portion is a closed wall portion, and
wherein the cooling structure is at least partially enclosed by the outer wall portion.

7. The turbine blade as claimed in claim 1 , further comprising:
between the blade tip and the end portion, a plurality of inner walls, which extend through the cooling structure.

8. The turbine blade as claimed in claim 1 , wherein the blade tip comprises a thermal barrier layer and/or an oxidation-resistant layer.

9. The turbine blade as claimed in claim 1 ,
wherein the blade tip and/or the cooling structure are configured to form a rubbing edge during operation of the turbine blade.

10. The turbine blade as claimed in claim 1 ,
wherein the cooling structure and/or the outer wall portion are produced or producible by additive manufacturing or by selective laser melting.

11. A method for producing a cooling structure for a turbine blade as claimed in claim 1 , comprising:
additively building of the cooling structure on the end portion of the turbine blade,
wherein the cooling structure is additively built up on the end portion such that the multiplicity of cooling ducts are formed,
wherein the multiplicity of cooling ducts are configured to have the cooling fluid flowing through them during operation in order to cool the turbine blade.

Assignees

• Siemens Ag
• Siemens Energy Global Gmbh & Co Kg

Inventors

• Anton Reiner
• Bostanjoglo Georg
• Flores Renteria Arturo
• Grodzki Jacek
• Herfurth Robert
• Schumann Eckart
• Settegast Silke
• Söl Rüstü

Classifications

• Y02P10/25

  Process efficiency · CPC title

• F05D2260/202

  by film cooling · CPC title

• F01D5/186 Primary

  Film cooling (F01D5/187 takes precedence) · CPC title

• F01D5/182

  Transpiration cooling · CPC title

• F05D2260/204

  by the use of microcircuits · CPC title