Stator damper
A stator damper is disclosed. The stator damper has a body section and a damper finger. The body section rests against a stator assembly and a portion of each damper finger rests against a compressor casing. The stator damper is radially compressed between the stator assembly and the compressor casing. Thus, the stator damper exerts a radial force against the stator assembly. In this manner, relative motion of the stator assembly is damped.
1. A stator damper, of a stator assembly disposed in a compressor casing of a gas turbine engine, the stator damper comprising: a body section comprising an annular cylinder section; a damper finger extending radially outward from the body section and comprising: an axially extending section comprising a flange extending axially aft from the body section; and a radial clip portion comprising a flange extending from an axially aft most end of the axially extending section according to a first clip angle; and a sealing member attached to the body section and disposed against a stator assembly of the gas turbine engine, the sealing member comprising an annular cylinder section radially inward of and co-axial with the body section, wherein the sealing member has an arc length that is greater than an arc length of the body section; wherein the damper finger is loaded in compression against the compressor casing of the gas turbine engine, and whereby the stator damper exerts a radial force along a path radially inward from the compressor casing through the stator assembly of the gas turbine engine, whereby relative motion of the stator assembly is damped.
2. The stator damper according to claim 1 ,
wherein the first clip angle is an acute angle, and
wherein the axially extending section is coplanar with the body section.
3. The stator damper according to claim 1 , wherein the damper finger further comprises a contact flange comprising an annular flange disposed at a radially outermost end of the radial clip portion and being concentric with the body section.
4. The stator damper according to claim 3 , wherein the contact flange is configured to rest against a compressor casing.
5. The stator damper according to claim 1 , comprising seven damper fingers.
6. The stator damper according to claim 5 , wherein the seven damper fingers are spaced evenly along an arc length of the body section.
7. The stator damper according to claim 1 , further comprising a plurality of damper fingers.
8. The stator damper according to claim 7 , wherein each of the plurality of damper fingers extends radially outward from an axially aft end of the body section.
9. The stator damper according to claim 7 , wherein each of the plurality of damper fingers is compressibly deformable and configured to be loaded in compression against a compressor casing.
10. The stator damper according to claim 9 , wherein each of the plurality of damper fingers comprises:
an axially extending section comprising a flange extending axially aft from the body section; and
a radial clip portion comprising a flange extending from the axially aft most end of the axially extending section according to the first clip angle.
11. The stator damper according to claim 10 , wherein each of the plurality of damper fingers further comprising a contact flange comprising an annular flange disposed at a radially outermost end of the radial clip portion and concentric with the body section.
12. A gas turbine engine comprising: a compressor casing; a stator assembly; a stator damper disposed radially outward of the stator assembly and radially inward of the compressor casing; and a sealing member attached to the stator damper and disposed against the stator assembly of the gas turbine engine, the sealing member comprising an annular cylinder section radially inward of and co-axial with the stator damper, wherein the sealing member has an arc length that is greater than an arc length of the stator damper; wherein the stator damper is loaded in compression between the compressor casing and the stator assembly.
13. The gas turbine engine according to claim 12 , wherein the stator damper comprises:
a body section comprising an annular cylinder section; and
a plurality of damper fingers extending radially outward from the body section.
14. The stator damper according to claim 13 , wherein each damper finger comprises:
an axially extending section comprising a flange extending axially aft from the body section; and
a radial clip portion comprising a flange extending from an axially aft most end of the axially extending section according to a first clip angle.
15. The stator damper according to claim 14 , wherein the first clip angle is an acute angle.
16. The stator damper according to claim 15 , wherein the axially extending section is coplanar with the body section.
17. The stator damper according to claim 16 , wherein each damper finger further comprises a contact flange comprising an annular flange disposed at a radially outermost end of the radial clip portion and concentric with the body section.
18. A method of making a stator damper comprising: forming a body section comprising an annular flange; forming a damper finger disposed at an axially aft end of the body section and comprising an axially extending section; attaching a sealing member to the body section of the stator damper, wherein the sealing member has an annular cylinder section radially inward of and co-axial with the stator damper and an arc length that is greater than an arc length of the body section of the stator damper; and bending the damper finger proximate to the axially extending section to form a radial clip portion extending radially from an axially aft most end of the axially extending section.
19. The method according to claim 18 , further comprising forming a contact flange at a radially outermost end of the radial clip portion and configured to be mechanically compressed against a compressor casing.