TURBINE SHROUD INCLUDING COOLING PASSAGES IN COMMUNICATION WITH COLLECTION PLENUMS

• US 20200131929A1
• Filed: 10/25/2018
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (GE Vernova, Inc.)
• Original Assignee: General Electric Company
• Inventors: Lacy, Benjamin Paul, Lutz, Matthew Scott, Sezer, Ibrahim, Wassynger, Stephen Paul
• Granted Patent: US 10,837,315 B2
• Time in Patent Office: Days
• CPC Class Codes: F01D 11/08 for sealing space between rotor blade tips and stator specially-shaped blade tips therefor F01D5/20
• CPC Class Codes: F01D 25/12 Cooling
• CPC Class Codes: F05D 2220/32 in gas turbines
• CPC Class Codes: F05D 2230/40 Heat treatment
• CPC Class Codes: F05D 2240/11 Shroud seal segments
• CPC Class Codes: F05D 2240/55 Seals
• CPC Class Codes: F05D 2250/185 serpentine-like
• CPC Class Codes: F05D 2260/202 by film cooling
• CPC Class Codes: F05D 2260/204 by the use of microcircuits

Abstract

Turbine shrouds for turbine systems are disclosed. The turbine shrouds may include a forward end, an aft end, a first and second side, an outer surface facing a cooling chamber formed between the body and the turbine casing, and an inner surface facing a hot gas flow path for the turbine system. The turbine shroud may also include at least one collection plenum extending within the body between the forward end and the aft end. Additionally, the turbine shroud may include set of cooling passage(s) extending within the body. Each of the cooling passages of the set of cooling passage(s) may include an inlet portion in fluid communication with the cooling chamber, an outlet portion in fluid communication with the at least one collection plenum, and an intermediate portion fluidly coupling the inlet portion and the outlet portion.

Claims

1. A turbine shroud coupled to a turbine casing of a turbine system, the turbine shroud comprising:

a body including;

a forward end;

an aft end positioned opposite the forward end;

a first side extending between forward end and aft end;

a second side extending between forward end and aft end, opposite the first side;

an outer surface facing a cooling chamber formed between the body and the turbine casing; and

an inner surface facing a hot gas flow path for the turbine system;

at least one collection plenum extending within the body between the forward end and the aft end; and

at least one set of cooling passages extending within the body, each of the cooling passages of the at least one set of cooling passages including;

an inlet portion extending through the outer surface and in fluid communication with the cooling chamber formed between the body and the turbine casing;

an outlet portion in fluid communication with the at least one collection plenum; and

an intermediate portion fluidly coupling the inlet portion and the outlet portion.

2. The turbine shroud of claim 1, wherein the at least one collection plenum includes:

a first side collection plenum extending within the body adjacent the first side of the body; and

a second side collection plenum extending within the body adjacent the second side of the body.

3. The turbine shroud of claim 2, wherein the at least one set of cooling passages includes:

a first set of cooling passages extending from adjacent the first side of the body to adjacent the second side, the inlet portion for each of the first set of cooling passages positioned adjacent the first side of the body and the outlet portion for each of the first set of cooling passages in fluid communication with the second side collection plenum; and

a second set of cooling passages extending from adjacent the second side of the body to adjacent the first side, the inlet portion for each of the second set of cooling passages positioned adjacent the second side of the body and the outlet portion for each of the second set of cooling passages in fluid communication with the first side collection plenum.

4. The turbine shroud of claim 3, wherein:

the first side collection plenum is positioned between the first side of the body and the inlet portion for each of the first set of cooling passages, and

the second side collection plenum is positioned between the second side of the body and the inlet portion for each of the second set of cooling passages.

5. The turbine shroud of claim 3, further comprising:

at least one first exhaust hole in fluid communication with the first side collection plenum, the at least one first exhaust hole extending through at least one of the aft end or the inner surface of the body; and

at least one second exhaust hole in fluid communication with the second side collection plenum, the at least one second exhaust hole extending through at least one of the aft end or the inner surface of the body.

6. The turbine shroud of claim 5, wherein:

the at least one first exhaust hole includes one of a predetermined diameter or a tapered geometry to determine an internal pressure of the first side collection plenum, and

the at least one second exhaust hole includes one of the predetermined diameter or the tapered geometry to determine an internal pressure of the second side collection plenum.

7. The turbine shroud of claim 5, wherein the at least one collection plenum further includes:

a central collection plenum extending within the body between the first side collection plenum and the second side collection plenum.

8. The turbine shroud of claim 7, wherein the at least one set of cooling passages includes:

a third set of cooling passages extending from adjacent the first side of the body to adjacent the central collection plenum, the inlet portion for each of the third set of cooling passages positioned adjacent the first side and the outlet portion for each of the third set of cooling passages in fluid communication with the central collection plenum; and

a fourth set of cooling passages extending from adjacent the second side of the body to adjacent the central collection plenum, the inlet portion for each of the fourth set of cooling passages positioned adjacent the second side and the outlet portion for each of the fourth set of cooling passages in fluid communication with the central collection plenum.

9. The turbine shroud of claim 8, further comprising:

at least one third exhaust hole in fluid communication with central collection plenum, the at least one third exhaust hole extending through the aft end of the body.

10. The turbine shroud of claim 2, further comprising:

at least one coupling conduit extending within the body, the at least one coupling conduit extending between and fluidly coupling the first side collection plenum and the second side collection plenum.

11. The turbine shroud of claim 2, wherein the first side collection plenum further comprises:

at least one wall extending within the first side collection plenum from the forward end to the aft end of the body, the at least one wall dividing the first side collection plenum into a plurality of distinct sections.

12. The turbine shroud of claim 11, wherein:

the outlet portion of a first group of the second set of cooling passages is in fluid communication with a first section of the plurality of distinct sections of the first side collection plenum, and

the outlet portion of a second group of the second set of cooling passages is in fluid communication with a second section of the plurality of distinct sections of the first side collection plenum.

13. The turbine shroud of claim 2, wherein the first side collection plenum further comprises:

at least one wall extending within the first side collection plenum between the outer surface of the body and the inner surface of the body, the at least one wall dividing the first side collection plenum into a plurality of distinct sections.

14. The turbine shroud of claim 13, wherein:

the outlet portion of a first group of the second set of cooling passages is in fluid communication with a forward section of the plurality of distinct sections of the first side collection plenum, and

the outlet portion of a second group of the second set of cooling passages is in fluid communication with a second section of the plurality of distinct sections of the first side collection plenum.

15. The turbine shroud of claim 2, wherein the at least one set of cooling passages includes:

a first set of cooling passages extending from adjacent the first side of the body to adjacent the second side and returning to the first side, the inlet portion for each of the first set of cooling passages positioned adjacent the first side and the outlet portion for each of the first set of cooling passages in fluid communication with the first side collection plenum; and

a second set of cooling passages extending from adjacent the second side of the body to adjacent the first side and returning to the second side, the inlet portion for each of the second set of cooling passages positioned adjacent the second side and the outlet portion for each of the second set of cooling passages in fluid communication with the second side collection plenum.

16. The turbine shroud of claim 1, wherein the at least one collection plenum includes:

a central collection plenum extending within the body between the first side of the body and the second side of the body.

17. The turbine shroud of claim 16, wherein the at least one set of cooling passages includes:

a first set of cooling passages extending from adjacent the first side of the body to the central collection plenum, the inlet portion for each of the first set of cooling passages positioned adjacent the first side and the outlet portion for each of the first set of cooling passages in fluid communication with the central collection plenum; and

a second set of cooling passages extending from adjacent the second side of the body to the central collection plenum, the inlet portion for each of the second set of cooling passages positioned adjacent the second side and the outlet portion for each of the second set of cooling passages in fluid communication with the central collection plenum.

18. A turbine shroud coupled to a turbine casing of a turbine system, the turbine shroud comprising:

a body including;

a forward end;

an aft end positioned opposite the forward end;

a first side extending between forward end and aft end;

a second side extending between forward end and aft end, opposite the first side;

an outer surface facing a cooling chamber formed between the body and the turbine casing; and

an inner surface facing a hot gas flow path for the turbine system;

at least one collection plenum extending within the body between the first side and the second side; and

at least one set of cooling passages extending within the body, each of the cooling passages of the at least one set of cooling passages including;

an inlet portion extending through the outer surface and in fluid communication with the cooling chamber formed between the body and the turbine casing;

an outlet portion in fluid communication with the at least one collection plenum; and

an intermediate portion fluidly coupling the inlet portion and the outlet portion.

19. The turbine shroud of claim 18, wherein the at least one collection plenum includes at least one of:

a forward collection plenum formed within the body adjacent the forward end of the body,

an aft collection plenum formed within the body adjacent the aft end of the body, or

a middle collection plenum extending within the body between the forward end and the aft end.

20. The turbine shroud of claim 19, wherein the at least one set of cooling passages includes at least one of:

a first set of cooling passages extending from adjacent the forward end of the body to adjacent the aft end, the inlet portion for each of the first set of cooling passages positioned adjacent the forward end and the outlet portion for each of the first set of cooling passages in fluid communication with the aft collection plenum,

a second set of cooling passages extending from adjacent the aft end of the body to adjacent the forward end, the inlet portion for each of the second set of cooling passages positioned adjacent the aft end and the outlet portion for each of the second set of cooling passages in fluid communication with the forward collection plenum,

a third set of cooling passages extending from adjacent the forward end of the body to adjacent the middle collection plenum, the inlet portion for each of the third set of cooling passages positioned adjacent the forward end and the outlet portion for each of the third set of cooling passages in fluid communication with the middle collection plenum, or

a fourth set of cooling passages extending from adjacent the aft end of the body to adjacent the middle collection plenum, the inlet portion for each of the fourth set of cooling passages positioned adjacent the aft end and the outlet portion for each of the fourth set of cooling passages in fluid communication with the middle collection plenum.