Device for cooling a supporting structure of a heat shield, and heat shield

Patent metadata

Field	Value
Publication number	US-9702560-B2
Application number	US-201314429737-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Sep 21, 2012
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A device ( 20, 29, 48, 64 ) for cooling a supporting structure of a heat shield ( 33, 60 ) to avoid scaling of the supporting structure due to the intake of hot gas. The device has a longitudinal axis ( 21 ) and a cooling air duct ( 22 ). The device is on the supporting structure with the longitudinal axis ( 21 ) intersecting the surface ( 51 ) of the supporting structure ( 34 ). In this position, the cooling air duct ( 22 ) extends from a device end ( 23 ) pointing towards the supporting structure. The device has at least one outlet duct downstream in the cooling air duct. The duct emerges out of the device ( 20, 29, 48, 64 ) laterally with respect to the longitudinal axis ( 21 ). The cooling air duct ( 22 ) corresponds to at least one cooling air passage ( 50 ) in the supporting structure ( 34 ).

First claim

The invention claimed is:

1. A heat shield cooling device for a combustion chamber of a gas turbine, the cooling device comprising:
a supporting structure, a plurality of heat shield tiles, tile holders releasably attaching the plurality of heat shield tiles to the supporting structure;
each heat shield tile of the plurality of heat shield tiles has a cold side oriented towards the supporting structure and an opposite hot side which is exposed to a hot medium;
each tile holder has a holding section for attaching to a heat shield tile of the plurality of heat shield tiles and an attachment section attached to the supporting structure for protecting the supporting structure from effects of hot gases;
at least one cooling air passage arranged in the supporting structure;
a post with a longitudinal axis and a cooling air duct extending through the post, the post is arranged on at least one of the at least one cooling air passage and the at least one of the at least one cooling air passage communicates cooling air into the cooling air duct for cooling the supporting structure;
the post is on the supporting structure and is above a surface of the supporting structure, the cooling air duct extends through the post from the at least one of the at least one cooling air passage, downstream to at least one outlet duct that exits the post laterally with respect to the longitudinal axis; and
the post on the supporting structure is located beneath a heat shield tile of the plurality of heat shield tiles, such that the at least one outlet duct of the post opens into an interspace between the cold side of the heat shield tile of the plurality of heat shield tiles and the supporting structure
wherein the attachment section extends from the surface of the supporting structure at the post along a direction within the interspace, and the direction comprises a direction component parallel to the surface of the supporting structure.

2. The heat shield cooling device as claimed in claim 1 , wherein the at least one outlet duct runs radially with respect to the longitudinal axis.

3. The heat shield cooling device as claimed in claim 1 , further comprising at least two oppositely directed ones of the at least one outlet ducts.

4. The heat shield cooling device as claimed in claim 2 , wherein the post has four of the at least one outlet ducts.

5. The heat shield cooling device as claimed in claim 1 , further comprising:
attachment slots running in the supporting structure, the attachment sections of the tile holders are releasably attached in the attachment slots; and
the at least one cooling air passage opens into a bottom of the attachment slot, and the post is arranged in the bottom of the attachment slot at the at least one cooling air passage.

6. The heat shield cooling device as claimed in claim 5 , further comprising the post is between two of the attachment sections of the tile holders.

7. The heat shield as claimed in claim 5 , further comprising a cooling air slot in the bottom of the attachment slot, the post is sunk into the at least one of the at least one cooling air passage at least at the level of the bottom of the attachment slot, and the at least one outlet ducts of the post open into the cooling air slot.

8. The heat shield cooling device as claimed in claim 7 , further comprising the cooling air slot comprises a runout at each ends of the cooling air slot.

9. The heat shield cooling device as claimed in claim 1 , further comprising the supporting structure and the post are aligned such that the post is sunk into the supporting structure for enabling installing and removing of the plurality of heat shield tiles without interference from the post.

10. A combustion chamber which is clad with a heat shield, wherein the heat shield cooling device is as claimed in claim 1 .

11. A gas turbine with at least one combustion chamber, wherein the at least one combustion chamber is as claimed in claim 10 .

Assignees

• Siemens Ag

Inventors

• Grendel Sabine
• Kluge Andre

Classifications

• F23R3/60

  Support structures; Attaching or mounting means · CPC title

• F23R3/002 Primary

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title

• F23R3/007

  constructed mainly of ceramic components · CPC title

• F23M5/085

  using air or other gas as the cooling medium · CPC title

• F23M5/04 Primary

  Supports for linings · CPC title