# US 6,276,142 B1 · Cooled heat shield for gas turbine combustor

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- Number: US 6,276,142 B1
- Document ID: US6276142B1
- Status: Granted
- Kind: B1
- Application number: 09/507,355
- Filed: 2000-02-18
- Granted: 2001-08-21
- Earliest claimed: 1997-08-18
- Assignees: Siemens Aktiengesellschaft
- Inventors: Heinrich Pütz
- Web page: https://patentgrep.com/patent/US6276142B1

## CPC

- F23R 3/002: {Wall structures (F23R3/02 and F23R3/007 take precedence)}
- F23M 5/02: characterised by the shape of the bricks or blocks used
- F05B 2260/201: by impingement of a fluid
- F05B 2260/205: Cooling fluid recirculation, i.e. after having cooled one or more components the cooling fluid is recovered and used elsewhere for other purposes
- F05B 2260/2241: using fins or ribs
- F23R 2900/00012: Details of sealing devices
- F23R 2900/03044: Impingement cooled combustion chamber walls or subassemblies
- F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16)
- F23M: CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G

## Abstract

A heat-shield component with cooling-fluid return includes an outer hollow body and an insert that can both be mounted on a supporting structure. The outer hollow body encloses the insert with a gap. The outer hollow body has a first bottom side which can be exposed to a hot gas. The insert has a second bottom side with a plurality of holes through which the cooling fluid flows into the gap for impact-cooling the first bottom side. A heat-shield configuration for a hot-gas conducting component as well as a heat-shield assembly are also provided.

## Claims

### Claim 1

A gas turbine, comprising:
a combustion chamber with an inner wall acting as a supporting structure; and
a heat-shield configuration including a plurality of heat-shield components disposed next to one another for attachment to said supporting structure, each of said heat-shield components having:
an outer hollow body to be attached to the supporting structure, said outer hollow body having side walls and a first base side to be exposed to a hot gas;
an insert to be attached to the supporting structure, said insert enclosed by said outer hollow body and defining an intermediate space between said outer hollow body and said insert, said insert having side walls and a second base side with a plurality of openings for passage of cooling fluid into said intermediate space; and
a hot gas directing component wall to be exposed to a hot gas, said wall formed by said first and second base sides of said heat-shield component.

### Claim 2

A gas turbine, comprising:
a combustion chamber having an inner wall acting as a supporting structure;
a heat-shield configuration including a plurality of heat-shield components disposed next to one another for attachment to said supporting structure, each of said heat-shield components having an outer hollow body to be attached to the supporting structure, said outer hollow body having side walls and a first base side to be exposed to a hot gas; an insert to be attached to the supporting structure, said insert enclosed by said outer hollow body and defining an intermediate space between said outer hollow body and said insert, said insert having side walls and a second base side with a plurality of openings for passage of cooling fluid into said intermediate space; and a hot gas directing component wall to be exposed to a hot gas, said wall formed by said first and second base sides of said heat-shield component;
said supporting structure having an inlet passage for cooling fluid in a region inside said side wall of said insert, and an outlet passage from said intermediate space for cooling fluid.

### Claim 3 (depends on 2)

The heat-shield assembly according to claim 2, including a hot-gas space, a feed passage disposed outside said hot-gas space and connected to said inlet passage, and a discharge passage disposed outside said hot-gas space and connected to said outlet passage.

### Claim 4 (depends on 3)

The heat-shield assembly according to claim 3, including a compressor feeding the cooling fluid through said feed passage to said heat-shield component.

### Claim 5 (depends on 4)

The heat-shield assembly according to claim 4, including a burner receiving the cooling fluid from said discharge passage.