Turbine exhaust cylinder/ turbine exhaust manifold bolted part span turbine exhaust flaps

Patent metadata

Field	Value
Publication number	US-9988931-B2
Application number	US-201514689111-A
Country	US
Kind code	B2
Filing date	Apr 17, 2015
Priority date	Sep 15, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A system and method to minimize flow induced vibration in a gas turbine exhaust is provided. The system includes a turbine exhaust manifold connected to a turbine exhaust cylinder establishing a fluid flow path, the fluid flow path bounded radially outward by an outer cylindrical surface and bounded radially inward by an inner cylindrical surface. At least one tangential strut is arranged between the outer cylindrical surface and the inner cylindrical surface. A first flap is arranged diagonally between the tangential strut and the outer cylindrical surface or the inner cylindrical surface where the first flap minimizes vortex shedding of the fluid flow from the tangential strut.

First claim

What is claimed is:

1. A system to minimize flow induced vibration in a gas turbine exhaust, comprising:
a turbine exhaust manifold connected to a turbine exhaust cylinder establishing a fluid flow path, the fluid flow path bounded radially outward by an outer cylindrical surface and bounded radially inward by an inner cylindrical surface;
a tangential strut arranged between the outer cylindrical surface and the inner cylindrical surface; and
a first flap arranged diagonally between the tangential strut and the outer cylindrical surface or the inner cylindrical surface,
wherein the first flap minimizes vortex shedding of the fluid flow from the tangential strut,
wherein the first diagonal flap extends from the outer cylindrical surface to a first position on the tangential strut between the outer cylindrical surface and the inner cylindrical surface, and
wherein a second flap extends from the inner cylindrical surface to a second position on the tangential strut between the outer cylindrical surface and the inner cylindrical surface.

2. The system as claimed in claim 1 ,
wherein a trailing edge of the first flap extends from the outer cylindrical surface or the inner cylindrical surface to a position on the tangential strut, and
wherein the first flap includes a radial edge that extends radially with respect to a rotor centerline along the tangential strut and an axial edge that extends axially with respect to the rotor centerline along the outer cylindrical surface or the inner cylindrical surface.

3. The system as claimed in claim 1 , wherein the first flap and the second flap are a mirror image of each other.

4. The system as claimed in claim 2 ,
wherein the radial edge is slideably attached to the tangential strut( 40 ) using a first sliding joint, and
wherein the axial edge is slideably attached to the outer cylindrical surface or the inner cylindrical surface using a second sliding joint.

5. The system as claimed in claim 4 , wherein each sliding joint comprises:
a plate abutting a mounting surface, the plate including a set of elongated holes,
a plurality of bushings, each bushing fitting within a respective elongated hole and abutting the mounting surface,
a plurality of radial threaded rods, each rod is welded to the mounting surface fits within a bushing, and protrudes through the respective elongated hole,
a locking spring washer disposed between the bushing and the plate, and
a plurality of fasteners, each fastener securing the bushing and radial threaded rod to the plate,
wherein the mounting surface includes the inner cylindrical surface ( 55 ), the outer cylindrical surface or the tangential strut.

6. The system as claimed in claim 2 ,
wherein the radial edge is attached to a first plate,
wherein the axial edge is attached to a second plate.

7. The system as claimed in claim 5 ,
wherein each bushing includes at least two flat sides to abut flat sides of the respective elongated hole,
wherein a gap exists between a surface of the plate and an opposing surface of the bushing,
wherein the locking spring washer is disposed within the gap, and
wherein the gap is sized to sufficiently compress the locking spring washer in order to hold the first flap onto the mounting surface.

8. The system as claimed in claim 7 ,
wherein the compression of the locking spring washer allows each sliding joint to slide within the elongated hole accommodating the differential thermal growth of the first flap and the mounting surface, and
wherein each sliding joint permits tangential motion to which mounting surface the sliding joint is attached while providing a rigid connection in the perpendicular direction.

9. A method to minimize flow induced vibration in a flow path of a gas turbine exhaust manifold and/or the gas turbine exhaust cylinder, comprising:
disposing a first flap between an outer cylindrical surface or an inner cylindrical surface of the flow path and a tangential strut;
attaching the first flap to the outer cylindrical surface or the inner cylindrical surface using a first sliding joint;
attaching the first flap to the tangential strut using a second sliding joint;
wherein the flow path is bounded radially outward by an outer cylindrical surface and bounded radially inward by an inner cylindrical surface,

wherein the first flap minimizes vortex shedding of the fluid flow from the tangential strut.

10. The method as claimed in claim 9 comprising,
providing a trailing edge of the first flap extending from the outer cylindrical surface or the inner cylindrical surface to the tangential strut, and
providing a radial edge of the first diagonal flap extending radially, with respect to the rotor centerline, along the tangential strut and providing an axial edge extending axially along the outer cylindrical surface or the inner cylindrical surface.

11. The method as claimed in claim 10 ,
wherein the radial edge is attached to the tangential strut using the first sliding joint, and
wherein the axial edge is attached to the outer cylindrical surface or the inner cylindrical surface using the second sliding joint.

12. The method as claimed in claim 10 ,
wherein the radial edge is coupled to a first plate,
wherein the axial edge is coupled to a second plate, and
wherein the first plate and the second plate each include a set of elongated holes.

13. The method as claimed in claim 12 ,
wherein the first plate is disposed against the tangential strut such that first plate abuts the tangential strut,
wherein the second plate is disposed against the inner cylindrical surface or the outer cylindrical surface such that the second plate abuts the inner cylindrical surface or the outer cylindrical surface, respectively.

14. The method as claimed in claim 13 , wherein the attaching includes:
coupling a plurality of threaded radial rods to a mounting surface,
disposing each radial threaded rod on the mounting surface such that each radial threaded rod protrudes through a respective elongated hole, and
wherein the mounting surface includes the inner cylindrical surface, the outer cylindrical surface, or the tangential strut.

15. The method as claimed in claim 14 ,
wherein the attaching includes:
inserting a bushing, the bushing including at least two flat sides, such that the flat sides about flat sides of the respective elongated hole, the bushing abuts the mounting surface and a gap exists between a surface of the first plate or second plate and an opposing surface of the bushing,
disposing a spring loaded washer within the gap,
wherein the gap is sized to sufficiently compress the spring loaded washer in order to hold the first flap onto the surface of the first plate or the second plate.

16. The method as claimed in claim 14 , wherein the attaching includes securing each radial threaded rod to the bushing using a nut tack welded to the bushing.

17. The method as claimed in claim 15 ,
wherein the compression of the spring loaded washer allows the first sliding joint and/or the second sliding joint to slide within the elongated hole accommodating the differential thermal growth of the first flap and the mounting surface, and
wherein the first sliding joint and the second sliding joint permit tangential motion to which mounting surface the sliding joint is attached while providing a rigid connection in the perpendicular direction.

18. The method as claimed in claim 9 ,
wherein the first flap is disposed between the outer cylindrical surface and the tangential strut, and
wherein a secon

Assignees

• Siemens Energy Inc

Inventors

• Shteyman Yevgeniy P
• Giaimo John
• Eshak Daniel M
• Orosa John A

Classifications

• F05D2230/60

  Assembly methods · CPC title

• F01D25/04 Primary

  Antivibration arrangements · CPC title

• F01D25/16

  Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F16C) · CPC title

• F01D25/30

  Exhaust heads, chambers, or the like · CPC title

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title