# US 2016/0258293 A1 · Stator of a turbine of a gas turbine with improved cooling air routing

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- Number: US 2016/0258293 A1
- Document ID: US20160258293A1
- Status: Published application
- Kind: A1
- Application number: 15/057,288
- Filed: 2016-03-01
- Published: 2016-09-08
- Earliest claimed: 2015-03-04
- Assignees: Rolls-Royce Deutschland Ltd & Co KG
- Applicants: Rolls-Royce Deutschland Ltd & Co KG
- Inventors: Markus WEINERT; Tobias LEYMANN
- Web page: https://patentgrep.com/patent/US20160258293A1

## CPC

- F01D 5/081: {Cooling fluid being directed on the side of the rotor disc or at the roots of the blades (F01D5/087 takes precedence)}
- F01D 9/02: Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)}
- F01D 9/041: {using blades (F01D5/148 takes precedence)}
- F01D 11/005: {Sealing means between non relatively rotating elements}
- F05D 2240/11: Shroud seal segments
- F05D 2240/57: Leaf seals
- F05D 2240/81: Cooled platforms
- F05D 2260/202: by film cooling
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A stator of a turbine of a gas turbine, having a flow duct in which stator vanes are arranged, each vane having an outer and an inner vane platform, and each having a cooling air chamber formed by adjacent vane platforms for passing through cooling air, characterized in that the resultant cooling air chamber and/or a platform intermediate gap are designed such that starting from a side of the vane platform facing the adjacent vane platform, at least one outflow pocket open to a platform upper side and connected to the cooling air chamber is formed, and that in the wall of the cooling air chamber, at least one cooling air pocket opened radially inwards to the cooling air chamber and limited by an intermediate element or a sealing strip is formed and opens to the platform intermediate gap.

## Claims

### Claim 1

A stator of a turbine of a gas turbine, having a flow duct in which stator vanes are arranged, each vane having an outer and an inner vane platform, and each having a cooling air chamber formed by adjacent vane platforms for passing through cooling air, wherein the resultant cooling air chamber and/or a platform intermediate gap are designed such that starting from a side of the vane platform facing the adjacent vane platform, at least one outflow pocket open to a platform upper side and connected to the cooling air chamber is formed, and that in the wall of the cooling air chamber, at least one cooling air pocket opened radially inwards to the cooling air chamber and limited by an intermediate element or a sealing strip is formed and opens to the platform intermediate gap.

### Claim 2 (depends on 1)

The stator in accordance with claim 1, wherein only one cooling air pocket is arranged on a vane platform.

### Claim 3 (depends on 1)

The stator in accordance with claim 1, wherein the cooling air pocket is designed convergent or divergent.

### Claim 4 (depends on 1)

The stator in accordance with claim 1, wherein the outflow pocket is designed at a shallow angle or tangentially to the platform upper side.

### Claim 5 (depends on 1)

The stator in accordance with claim 1, wherein the outflow pocket is designed with surfaces freely merging into one another.

### Claim 6 (depends on 1)

The stator in accordance with claim 1, wherein the walls of the cooling air pocket are designed freely merging into one another.

### Claim 7 (depends on 1)

The stator in accordance with claim 1, wherein the outflow pocket has a further through-flow recess in an integral design with predominantly radial orientation.

### Claim 8 (depends on 1)

The stator in accordance with claim 1, wherein over the axial length of the vane platform several outflow pockets are arranged, or one outflow pocket covering the entire length.

### Claim 9 (depends on 1)

The stator in accordance with claim 1, wherein over the axial length of the vane platform several cooling air pockets are arranged.

### Claim 10 (depends on 9)

The stator in accordance with claim 9, wherein the several cooling air pockets are designed partially or completely merging into one another.

### Claim 11 (depends on 1)

The stator in accordance with claim 1, wherein the outflow pocket and/or the cooling air pocket is provided on a radially outer hot gas platform surface.