System and method for removing stator vanes from a casing of a rotary machine

Patent metadata

Field	Value
Publication number	US-9810083-B2
Application number	US-201715413787-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Dec 3, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A stator vane removal system includes a reaction platform configured to couple between opposing sides of a slot defined in an inner surface of a casing of a rotary machine. At least one stator vane is retained in the slot. The reaction platform includes at least one wedge surface. The system also includes an actuator configured to couple to the reaction platform. The at least one wedge surface facilitates inducing a coupling force exerted by the reaction platform to the opposing sides of the slot when the actuator applies a pushing force to the at least one stator vane in the slot.

First claim

What is claimed is:

1. A stator vane removal system comprising:
a reaction platform configured to couple between opposing sides of a slot defined in an inner surface of a casing of a rotary machine, wherein at least one stator vane is retained in the slot, said reaction platform comprises a block and at least one sleeve configured to slidably couple to said block along at least one wedge surface; and
an actuator configured to couple to said reaction platform, said at least one wedge surface is configured to induce a coupling force exerted by said reaction platform to the opposing sides of the slot in response to a pushing force applied by said actuator to the at least one stator vane in the slot.

2. The system according to claim 1 , wherein said block comprises a first bearing surface configured to couple to a first of the opposing sides of the slot, and said sleeve comprises a second bearing surface configured to couple to a second of the opposing sides of the slot.

3. The system according to claim 2 , wherein said block further comprises a reaction surface configured to couple to said actuator, said reaction surface is generally perpendicular to said first bearing surface.

4. The system according to claim 3 , wherein said at least one wedge surface includes a block wedge surface of said block and a sleeve wedge surface of said sleeve, said sleeve wedge surface is slidably coupled to said block wedge surface.

5. The system according to claim 4 , wherein said block wedge surface faces obliquely toward said sleeve and faces obliquely away from said reaction surface.

6. The system according to claim 5 , wherein said sleeve wedge surface is inclined oppositely from, and complementarily to, said block wedge surface.

7. The system according to claim 1 , wherein said block further comprises a post, said post is received at least partially within a cavity defined by said sleeve.

8. The system according to claim 1 , wherein said reaction platform comprises a block and a pair of sleeves, each said sleeve is slidably coupled to one of a pair of opposing sides of said block.

9. The system according to claim 8 , wherein a first of said pair of sleeves comprises a first bearing surface configured to couple to a first of the opposing sides of the slot, and a second of said pair of sleeves comprises a second bearing surface configured to couple to a second of the opposing sides of the slot.

10. The system according to claim 9 , wherein said at least one wedge surface includes a pair of block wedge surfaces disposed on opposite sides of said block and a sleeve wedge surface of each said sleeve, each said sleeve wedge surface is slidably coupled to one of said pair of block wedge surfaces.

11. The system according to claim 1 , wherein said actuator is configured to apply the pushing force to the at least one stator vane in a direction approximately tangential to the slot.

12. A stator vane removal system comprising:
a reaction platform configured to couple between opposing sides of a slot defined in an inner surface of a casing of a rotary machine, wherein at least one stator vane is retained in the slot, said reaction platform comprises at least one wedge surface; and
an actuator configured to couple to said reaction platform, said at least one wedge surface oriented to react a pushing force applied to the at least one stator vane in the slot by said actuator such that a coupling force is exerted by said reaction platform to the opposing sides of the slot in a direction substantially perpendicular to the pushing force.

13. The system according to claim 12 , wherein said reaction platform comprises a block and at least one sleeve slidably coupled to said block along said at least one wedge surface.

14. The system according to claim 13 , wherein said block comprises a first bearing surface configured to couple to a first of the opposing sides of the slot, and said at least one sleeve comprises a second bearing surface configured to couple to a second of the opposing sides of the slot.

15. The system according to claim 14 , wherein said at least one wedge surface includes a block wedge surface of said block and a sleeve wedge surface of said at least one sleeve, said sleeve wedge surface is slidably coupled to said block wedge surface.

16. A stator vane removal system comprising:
a reaction platform configured to couple between opposing sides of a slot defined in an inner surface of a casing of a rotary machine, wherein at least one stator vane is retained in the slot, said reaction platform comprises at least one wedge surface; and
an actuator configured to couple between said reaction platform and the at least one stator vane such that said actuator is disposed at least partially between the opposing sides of the slot, said at least one wedge surface is oriented to induce a coupling force exerted by said reaction platform to the opposing sides of the slot when said actuator applies a pushing force to the at least one stator vane in the slot.

17. The system according to claim 16 , wherein said reaction platform comprises a block and at least one sleeve slidably coupled to said block along said at least one wedge surface.

18. The system according to claim 17 , wherein said block comprises a first bearing surface configured to couple to a first of the opposing sides of the slot, and said at least one sleeve comprises a second bearing surface configured to couple to a second of the opposing sides of the slot.

19. The system according to claim 18 , wherein said block further comprises a reaction surface configured to couple to said actuator, said reaction surface is generally perpendicular to said first bearing surface.

20. The system according to claim 16 , wherein said block further comprises a post, said post is received at least partially within a cavity defined by said at least one sleeve.

Assignees

• Gen Electric

Inventors

• Oden Joshua Michael
• Holmes James Bradford

Classifications

• F01D9/042 Primary

  fixing blades to stators (fixing stator-rings in the casing or to each other F01D25/246) · CPC title

• B23P19/00

  Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) · CPC title

• F01D9/02

  Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title

• F05D2230/70

  Disassembly methods · CPC title

• B23P19/04

  for assembling or disassembling parts · CPC title