Stator anti-rotation lug

Patent metadata

Field	Value
Publication number	US-10428832-B2
Application number	US-201213567376-A
Country	US
Kind code	B2
Filing date	Aug 6, 2012
Priority date	Aug 6, 2012
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A compressor assembly of a gas turbine engine includes a case including at least one opening and a stator assembly supported within the case. A lug assembly is secured to the case and sets a position of the stator assembly relative to the case. The lug assembly includes a lug engaging the stator assembly and a boss extending from the lug through the opening in the case. The boss including a threaded hole receiving a threaded member holding the lug assembly to the case and defines a seat for the threaded member that is spaced apart from an outer surface of the case.

First claim

What is claimed is:

1. A compressor assembly of a gas turbine engine comprising:
a case including at least one opening and axially spaced apart channels;
a stator assembly supported within the case, the stator assembly including a plurality of stator vanes received within the channels of the case and movable circumferentially within the channels; and
a lug assembly separate from the plurality of stator vanes for holding a position of the plurality of stator vanes relative to the case, the lug assembly including a lug disposed within the channels and abutting at least one of the plurality of stator vanes, the lug assembly further including a boss extending from the lug through the opening in the case, the boss including a threaded hole receiving a threaded member holding the lug assembly to the case.

2. The compressor assembly as recited in claim 1 , wherein the lug includes an outer surface and the boss extends transverse to the outer surface with a relief disposed at an interface between the outer surface and the boss.

3. The compressor assembly as recited in claim 2 , wherein the case includes a thickness and a length of the boss extending from the outer surface of the lug is greater than the case thickness.

4. The compressor assembly as recited in claim 3 , wherein the boss defines a seat for the threaded member in an assembled condition, the seat spaced apart from an outer surface of the case.

5. The compressor assembly as recited in claim 1 , wherein the hole extends through the boss and the lug.

6. The compressor assembly as recited in claim 1 , wherein the case includes a pad through which the opening for the boss is defined, the pad defining a substantially flat surface.

7. The compressor assembly as recited in claim 6 , wherein the case includes first and second opposing flanges and an outer surface that tapers in a direction away from each of the first and second flanges toward the pad.

8. The compressor assembly as recited in claim 1 , wherein each of the plurality of stator vanes includes a platform including feet received in the spaced apart channels and the lug extends between the spaced apart channels.

9. The compressor assembly as recited in claim 8 , wherein at least one of the plurality of stator vanes includes a slot in an upper platform and the lug is received within the slot.

10. A gas turbine engine comprising:
a fan including a plurality of fan blades rotatable about an axis;
a compressor section including a case with at least one opening, a stator assembly supported within the case, and a lug assembly securing the stator assembly relative to the case, the lug assembly including a lug extending between axially spaced apart channels in the case and holding the stator assembly in position, the lug assembly further including a boss extending from the lug through the opening in the case, the boss including a threaded hole receiving a threaded member holding the lug assembly to the case;
a combustor in fluid communication with the compressor section;
a turbine section in fluid communication with the combustor and for driving the compressor section.

11. The gas turbine engine as recited in claim 10 , wherein the lug includes an outer surface and the boss extends transverse to the outer surface with a relief disposed at an interface between the outer surface and the boss.

12. The gas turbine engine as recited in claim 10 , wherein the case includes a thickness and a length of the boss extending from the outer surface of the lug is greater than the case thickness.

13. The gas turbine engine as recited in claim 10 , wherein the boss defines a seat for the threaded member in an assembled condition, the seat spaced apart from an outer surface of the case.

14. The gas turbine engine as recited in claim 10 , wherein the case includes first and second opposing flanges and an outer surface that tapers in a direction away from each of the first and second flanges toward a pad.

15. The gas turbine engine as recited in claim 10 , including a geared architecture driven by the turbine section for rotating the fan about the axis.

16. A method of supporting a stator vane within a case comprising:
supporting at least one stator vane within axially spaced apart channels of a case;
engaging a lug extending across the axially spaced apart channels to at least one of a plurality of stator vanes to maintain a position of the plurality of stator vanes relative to the case;
extending a boss of the lug through the case; and
securing a threaded fastener within a threaded hole defined through the boss.

17. The method as recited in claim 16 , wherein the boss defines a seat spaced apart from an outer surface of the case and including securing the fastener against the seat and spaced apart from the outer surface of the case.

18. The method as recited in claim 16 , wherein an interface between the boss and the lug includes a relief that provides a clearance such that a surface of the lug fits against an inner surface of the case.

Assignees

• Lockhart Eugene
• Weinstein Jess A
• Dube David P
• United Technologies Corp

Inventors

• Lockhart Eugene
• Weinstein Jess A
• Dube David P

Classifications

• F01D9/042

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

• F04D29/644

  especially adapted for elastic fluid pumps · CPC title

• F04D29/542 Primary

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F05D2260/36

  by a form fit connection, e.g. by interlocking · CPC title

• F05D2220/3216

  for a special compressor stage · CPC title