Turbomachine rotor blade milling machine system and method of field repairing a turbomachine rotor blade

Patent metadata

Field	Value
Publication number	US-9988906-B2
Application number	US-201514965938-A
Country	US
Kind code	B2
Filing date	Dec 11, 2015
Priority date	Feb 8, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A turbomachine rotor blade milling machine system includes a fixture having a body including first and second opposing surfaces and a slot. The fixture is configured and disposed to connect with first and second rotor blade sections mounted in a rotor wheel. A mounting system includes at least one mounting element coupled to one of the first and second opposing surfaces of the body at the slot. A milling machine is coupled to the one of the first and second opposing surfaces through the at least one mounting element. The milling machine includes a cutter and is configured and disposed to form an opening extending axially through a dovetail portion of a third rotor blade section arranged between the first and second rotor blade sections.

First claim

What is claimed is:

1. A turbomachine, comprising:
a compressor portion comprising:
a compressor rotor wheel defining a plurality of slots; and
a plurality of compressor rotor blades, each compressor rotor blade comprising a root section received by one of the plurality of slots of the compressor rotor wheel;

a combustor assembly;
a turbine portion comprising:
a turbine rotor wheel defining a plurality of slots; and
a plurality of turbine rotor blades, each turbine rotor blade comprising a root section received by one of the plurality of slots of the turbine rotor wheel; and

a machining system comprising a fixture mounted to the root section of one of the compressor rotor blades or the root section of one of the turbine rotor blades.

2. The turbomachine of claim 1 , wherein the fixture mounts to the root sections of two of the plurality of compressor rotor blades or to the root sections of two of the plurality of turbine rotor blades.

3. The turbomachine of claim 1 , further comprising:
a dummy dovetail section positioned in one of the plurality of slots in the compressor rotor wheel or in one of the plurality of slots in the turbine rotor wheel, wherein the fixture mounts to the dummy dovetail section.

4. The turbomachine of claim 1 , wherein the fixture mounts to the root section of one of the plurality of compressor rotor blades.

5. The turbomachine of claim 1 , wherein the fixture mounts to the root section of one of the plurality of turbine rotor blades.

6. The turbomachine of claim 1 , wherein the compressor rotor wheel defines a plurality of dovetail slots.

7. The turbomachine of claim 1 , wherein the turbine rotor wheel defines a plurality of dovetail slots.

8. The turbomachine of claim 1 , wherein the root portion of one of the plurality of compressor rotor blades or the root portion of one of the plurality of turbine rotor blades define a plurality of openings.

9. The turbomachine of claim 8 , wherein the fixture defines a plurality of openings, and wherein each of the plurality of openings defined by the fixture are axially and circumferentially aligned with one of the plurality of openings defined by the root portion of one of the plurality of compressor rotor blades or the root portion of one of the plurality of turbine rotor blades.

10. The turbomachine of claim 1 , wherein the machining system comprises a milling machine, the milling machine comprising a cutter for forming an opening in the root portion of one of the plurality of compressor rotor blades or the root portion of one of the plurality of turbine rotor blades.

11. The turbomachine of claim 10 , wherein the machining system comprises a mounting system for coupling the milling machine to the fixture.

Assignees

• Gen Electric

Inventors

• Clark Jason Matthew
• Herbold John William
• Holmes James Bradford

Classifications

• Y10T29/49318

  Repairing or disassembling · CPC title

• Y10T29/37

  Impeller making apparatus · CPC title

• F04D29/324

  Blades · CPC title

• F01D5/12

  Blades ({specially adapted for radial flow machines or engines F01D5/04}; blade roots F01D5/30; rotors with blades adjustable in operation F01D7/00; stator blades F01D9/02) · CPC title

• F05D2230/80

  Repairing, retrofitting or upgrading methods · CPC title