Mid-frame for a gas turbine and gas turbine

Patent metadata

Field	Value
Publication number	US-9759231-B2
Application number	US-201514714881-A
Country	US
Kind code	B2
Filing date	May 18, 2015
Priority date	May 19, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The invention relates to a mid-frame ( 10 ) for a gas turbine, having at least one outer casing element ( 12 ) and having a plurality of duct segments ( 16 ), which are arranged in succession in the radial direction on the inside of the outer casing element ( 12 ) and in the peripheral direction of the casing element ( 12 ) and by which segments, in each case, at least one duct ( 18 ) through which a gas can flow is delimited at least in the radial direction at least partially, wherein a ring element ( 22 ) that is common to the duct segments ( 16 ) and is formed in one piece is provided, by means of which the duct segments ( 16 ) are held at the outer casing element ( 12 ).

First claim

The invention claimed is:

1. A mid-frame ( 10 ) for a gas turbine, having at least one outer casing element ( 12 ) and having a plurality of duct segments ( 16 ), which are arranged in succession in the radial direction on the inside of the outer casing element ( 12 ) and in the peripheral direction of the outer casing element ( 12 ) and by which segments, in each case, at least one duct ( 18 ) through which a first gas can flow is delimited at least in the radial direction at least partially,
comprising a ring element ( 22 ) that is common to the duct segments ( 16 ) and is formed in one piece and the duct segments ( 16 ) are held at the outer casing element ( 12 );
the ring element ( 22 ) having a ring body ( 24 ), from which tabs ( 26 ) protrude in the radial direction inwardly, where the duct segments ( 16 ) are retained at the ring element ( 22 ) by the tabs ( 26 ), with passage openings ( 28 ) defined between the tabs ( 26 ) in the peripheral direction, openings between the tabs ( 26 ) are spaced apart from one another in the peripheral direction.

2. The mid-frame ( 10 ) according to claim 1 ,
wherein the passage openings ( 28 ) are closed by means of a sealing device ( 30 ).

3. The mid-frame ( 10 ) according to claim 2 ,
wherein the sealing device ( 30 ) has at least two layers ( 32 , 34 ) that have respective sealing elements ( 36 , 38 ) and are arranged one behind the other in the axial direction, with the sealing elements ( 36 ) of a first of the layers ( 32 , 34 ) and the sealing elements ( 38 ) of a second of the layers ( 32 , 34 ) being arranged offset with respect to each other in the peripheral direction and mutually overlapping partially in the axial direction.

4. The mid-frame ( 10 ) according to claim 1 , further comprising:
a chamber ( 20 ) that at least partially surrounds the duct ( 18 ) is delimited by the outer casing element ( 12 ) and the duct segments ( 16 ) and another gas, which has a higher pressure in comparison to the first gas, is admitted to the chamber.

5. The mid-frame ( 10 ) according to claim 3 , wherein the sealing elements ( 36 , 38 ) are arranged on a side ( 44 ) of the ring element ( 22 ), which faces the chamber ( 20 ).

6. The mid-frame ( 10 ) according to claim 1 , wherein the duct segments ( 16 ) are each fastened to the ring element ( 22 ) by at least one screw bolt connection ( 50 ).

7. The mid-frame ( 10 ) according to claim 1 , wherein the ring element ( 22 ) is retained at the outer casing element ( 10 ) by at least one screw bolt connection ( 50 ).

8. The mid-frame ( 10 ) according to claim 1 , wherein the ring element ( 22 ) is arranged in the axial direction partially between the outer casing element ( 12 ) and at least one other casing element ( 14 ) of the gas turbine and is clamped between the casing elements ( 12 , 14 ).

9. The mid-frame ( 10 ) according to claim 1 , wherein the ring element ( 22 ) is formed in one piece.

10. The mid-frame ( 10 ) according to claim 1 , wherein at least one mid-frame is a component of a gas turbine.

11. A mid-frame ( 10 ) for a gas turbine, having at least one outer casing element ( 12 ) and having a plurality of duct segments ( 16 ), which are arranged in succession in the radial direction on the inside of the outer casing element ( 12 ) and in the peripheral direction of the outer casing element ( 12 ) and by which segments, in each case, at least one duct ( 18 ) through which a first gas can flow is delimited at least in the radial direction at least partially,
comprising a ring element ( 22 ) that is common to the duct segments ( 16 ) and is formed in one piece and the duct segments ( 16 ) are held at the outer casing element ( 12 );
wherein the ring element ( 22 ) has a ring body ( 24 ), from which tabs ( 26 ) protrude in the radial direction inwardly, where the duct segments ( 16 ) are retained at the ring element ( 22 ), with passage openings ( 28 ) defined between the tabs ( 26 ) in the peripheral direction, openings between the tabs ( 26 ) are spaced apart from one another in the peripheral direction;
wherein the passage openings ( 28 ) are closed by means of a sealing device ( 30 );
wherein the sealing device ( 30 ) has at least two layers ( 32 , 34 ) that have respective sealing elements ( 36 , 38 ) and are arranged one behind the other in the axial direction, with the sealing elements ( 36 ) of a first of the layers ( 32 , 34 ) and the sealing elements ( 38 ) of a second of the layers ( 32 , 34 ) being arranged offset with respect to each other in the peripheral direction and mutually overlapping partially in the axial direction.

12. The mid-frame ( 10 ) according to claim 11 , wherein the sealing elements ( 36 , 38 ) are arranged on a side ( 44 ) of the ring element ( 22 ), which faces the chamber ( 20 ).

Assignees

• MTU Aero Engines AG

Inventors

• Kirchner Daniel
• Eichinger Alois

Classifications

• F04D29/545 Primary

  Ducts · CPC title

• F01D25/265 Primary

  Vertically split casings; Clamping arrangements therefor · CPC title

• Y02T50/671

  Cross-Sectional Technologies · mapped topic

• F01D25/28

  Supporting or mounting arrangements, e.g. for turbine casing · CPC title

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title