Article of manufacture for turbomachine

Patent metadata

Field	Value
Publication number	US-10724377-B2
Application number	US-201615188157-A
Country	US
Kind code	B2
Filing date	Jun 21, 2016
Priority date	Jul 24, 2012
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

An article of manufacture includes a rotor blade configured for use with a turbomachine. The blade is configured for attachment to a rotor wheel. The blade is configured to substantially reduce the possibility of attachment with an undesired rotor wheel by modification of at least one characteristic of the blade, so that the modification of the characteristic is matched by a complementary characteristic of the rotor wheel. The characteristic of the blade is, neck width, platform length, platform angle, platform height, tang height, or circumferential width. The blade and the wheel comprise a first stage of the turbomachine. The undesired rotor wheel is in a second stage of the turbomachine, where the first stage is different from the second stage. The complementary characteristic of the wheel is, slot opening width, platform opening depth, slot neck width, slot neck angle, slot tang depth, or slot tang width.

First claim

The invention claimed is:

1. An apparatus, comprising:
a rotor blade comprising a mounting base configured to mount in a slot of a plurality of rotor slots in a rotor of a turbomachine, wherein the plurality of rotor slots have different geometries relative to one another, wherein the rotor blade comprises:
a blade portion;
a mounting base portion coupled to the blade portion, wherein the mounting base portion has at least one geometry matched with a corresponding geometry of the slot in the rotor and mismatched with a different geometry of a different rotor slot of the plurality of rotor slots in the rotor, and the at least one geometry comprises at least three features of a plurality of features selected from a platform width, a platform height, a platform angle, a tang height, or a circumferential width, wherein the platform width, the platform height, and the platform angle correspond to a platform geometry of a platform configured to extend into a platform recess at the slot.

2. The apparatus of claim 1 , wherein the at least three features comprise at least two of: the platform width, the platform height, or the platform angle.

3. The apparatus of claim 1 , wherein the at least three features comprises the circumferential width.

4. The apparatus of claim 1 , wherein the at least one geometry comprises each of the platform width, the platform height, and the platform angle.

5. The apparatus of claim 1 , wherein the at least one geometry comprises at least four of the platform width, the platform height, the platform angle, the tang height, or the circumferential width.

6. The apparatus of claim 1 , wherein the at least one geometry comprises each of the platform width, the platform height, the platform angle, the tang height, and the circumferential width.

7. The apparatus of claim 1 , comprising the turbomachine having a plurality of the rotor blades.

8. The apparatus of claim 7 , wherein the turbomachine comprises a compressor, a turbine, or a combination thereof.

9. The apparatus of claim 7 , wherein the slot and the different rotor slot are disposed in different stages of the turbomachine.

10. The apparatus of claim 9 , wherein the turbomachine comprises at least three stages of rotor blades disposed in respective rotor slots of the plurality of rotor slots, and each stage of the at least three stages has the mounting base portion with at least one geometry matched with a corresponding geometry of the respective rotor slot and mismatched with different geometries of the remaining rotor slots of the plurality of rotor slots.

11. The apparatus of claim 1 , wherein the slot and the different slot of the plurality of rotor slots are different stages downstream from a first stage of the turbomachine.

12. The apparatus of claim 1 , wherein the slot and the different slot of the plurality of rotor slots are oriented in a common slot direction relative to a longitudinal axis of the turbomachine.

13. The apparatus of claim 12 , wherein the common slot direction is a circumferential slot direction about the longitudinal axis of the turbomachine.

14. An apparatus, comprising:
a rotor comprising a plurality of rotor slots configured to support a plurality of mounting base portions of a plurality of rotor blades of a turbomachine, wherein the plurality of rotor slots have different geometries relative to one another, wherein a slot of the plurality of rotor slots is configured to support a mounting base portion of a rotor blade of the plurality of rotor blades of the turbomachine,
wherein the slot has at least one geometry matched with a corresponding geometry of the mounting base portion of the rotor blade of the plurality of rotor blades and mismatched with a different geometry of a different mounting base portion of another rotor blade of the plurality of rotor blades, and the at least one geometry comprises at least three features of a plurality of features selected from a platform recess width, a platform recess depth, a platform recess angle, a slot opening width, a slot neck angle, a slot tang depth, or a slot tang width, wherein the platform recess width, the platform recess depth, and the platform recess angle correspond to a platform recess geometry of a platform recess configured to receive a platform of the mounting base portion of the rotor blade.

15. The apparatus of claim 14 , wherein the at least three features comprise at least two of: the slot opening width, the slot neck angle, the slot tang depth, or the slot tang width.

16. The apparatus of claim 14 , wherein the at least one geometry comprises each of the platform recess width, the platform recess depth, and the platform recess angle.

17. The apparatus of claim 14 , wherein the turbomachine comprises at least three stages of rotor blades of the plurality of rotor blades disposed in respective rotor slots of the plurality of rotor slots, and each stage of the at least three stages has the mounting base portion with at least one geometry matched with a corresponding geometry of the respective rotor slot of the plurality of rotor slots and mismatched with different geometries of the remaining rotor slots of the plurality of rotor slots.

18. The apparatus of claim 14 , wherein the at least one geometry comprises at least four of the platform recess width, the platform recess depth, the platform recess angle, the slot opening width, the slot neck angle, the slot tang depth, or the slot tang width.

19. The apparatus of claim 14 , comprising the turbomachine having the rotor with a plurality of stages, wherein the slot supporting the mounting base portion of the rotor blade is disposed in a different stage than another slot supporting the different mounting base portion of the other rotor blade.

20. An apparatus, comprising:
a turbomachine, comprising:
a rotor having a plurality of rotor slots, wherein the plurality of rotor slots have different geometries relative to one another; and
at least three stages of rotor blades of a plurality of rotor blades disposed in respective rotor slots of the plurality of rotor slots, wherein each rotor blade of the plurality of rotor blades has a blade portion coupled to a mounting base portion configured to mount in one of the plurality of rotor slots, wherein at least one rotor blade of the plurality of rotor blades in each stage of the at least three stages has the mounting base portion with at least one geometry matched with a corresponding geometry of the rotor slot in the respective stage and mismatched with different geometries of the remaining rotor slots of the plurality of rotor slots in the at least three stages, wherein the at least one geometry comprises at least one of: a platform geometry of a platform configured to extend into a platform recess at the rotor slot, a tang height, or a circumferential width.

21. The apparatus of claim 20 , wherein the platform geometry comprises at least one of a platform width, a platform height, or a platform angle.

22. The apparatus of claim 21 , wherein the at least one geometry comprises at least three of the platform width, the platform height, the platform angle, the tang height, or the circumferential width.

Assignees

• Gen Electric

Inventors

• Lumpkin Jamie Dean
• Tipton Thomas Robbins
• Aaron Kelvin Rono

Classifications

• F01D5/28 Primary

  Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion · CPC title

• F01D25/007

  Preventing corrosion · CPC title

• F01D25/005

  Selecting particular materials · CPC title

• F01D25/002

  Cleaning of turbomachines · CPC title

• F01D9/00

  Stators · CPC title