Removable pin retention plugs for turbine shroud assemblies
A turbine shroud assembly includes a carrier segment, a blade track segment, and a mount assembly. The carrier segment includes an outer wall, a first flange that extends radially inward from the outer wall, and a second flange axially spaced apart from the first flange and extending radially inward from the outer wall. The blade track segment includes a shroud wall and an attachment feature that extends radially outward from the shroud wall. The mount assembly includes a pin that extends axially into the second flange, through the attachment feature, and into the first flange so as to couple the blade track segment to the carrier segment and a pin retention plug that is press fit into the second flange axially aft of the pin to block removal of the pin through the second flange.
1 . A turbine shroud assembly for use with a gas turbine engine, the turbine shroud assembly comprising:
a carrier segment arranged to extend circumferentially at least partway around an axis, the carrier segment including an outer wall, a first flange that extends radially inward from the outer wall, and a second flange spaced apart axially aft from the first flange and extending radially inward from the outer wall,
a blade track segment supported by the carrier segment to define a portion of a gas path of the turbine shroud assembly, the blade track segment including a shroud wall that extends circumferentially partway around the axis, a first attachment flange that extends radially outward from the shroud wall, and a second attachment flange axially spaced apart from the first attachment flange and extending radially outward from the shroud wall, and
a mount assembly including a first pin that extends axially into a first aperture formed in the second flange of the carrier segment, through the first attachment flange and the second attachment flange, and into the first flange of the carrier segment so as to couple the blade track segment to the carrier segment and a first pin retention plug that is press fit into the first aperture of the second flange of the carrier segment axially aft of the first pin and circumferentially aligned with the first pin to block removal of the first pin through the first aperture in the second flange,
wherein the first pin retention plug extends between a first axial end that abuts the first pin and a second axial end opposite the first axial end, and wherein the first pin retention plug is formed to include a removal aperture that extends into the first pin retention plug from the second axial end thereof toward the first axial end,
wherein the removal aperture of the first pin retention plug is formed to include threads to aid in removal of the first pin retention plug from the first aperture,
wherein the removal aperture does not extend entirely axially through the first pin retention plug.
2 . The turbine shroud assembly of claim 1 , wherein the first pin retention plug has a constant diameter along an axial length of the first pin retention plug.
3 . The turbine shroud assembly of claim 1 , wherein the first pin retention plug has a circular cross-sectional shape.
4 . The turbine shroud assembly of claim 1 , wherein the first pin includes a forward pin segment that extends axially into the first flange of the carrier segment and through the first attachment flange and an aft pin segment that extends through the second attachment flange and the second flange of the carrier segment.
5 . The turbine shroud assembly of claim 4 , wherein the carrier segment further includes a third flange located axially between the first flange and the second flange and extending radially inward from the outer wall and a fourth flange located axially between the third flange and the second flange and extending radially inward from the outer wall, and wherein the forward pin segment extends through the third flange and the aft pin segment extends through the fourth flange.
6 . The turbine shroud assembly of claim 4 , wherein the forward pin segment and the aft pin segment are separate from one another so as to allow for independent loading.
7 . The turbine shroud assembly of claim 1 , wherein the first aperture is defined by a first portion and a second portion axially aft of the first portion, and wherein the first portion has a first diameter and the second portion has a second diameter that is greater than the first diameter.
8 . The turbine shroud assembly of claim 7 , wherein the first pin is located in the first portion of the first aperture and the first pin retention plug is located in the second portion of the first aperture.
9 . The turbine shroud assembly of claim 1 , wherein the mount assembly further including a second pin that extends axially into a second aperture formed in the second flange of the carrier segment, through the first attachment flange and the second attachment flange, and into the first flange of the carrier segment so as to couple the blade track segment to the carrier segment and a second pin retention plug that is press fit into the second aperture of the second flange of the carrier segment axially aft of the second pin and circumferentially aligned with the second pin to block removal of the second pin through the second aperture in the second flange, and wherein the second pin and the second pin retention plug are circumferentially spaced apart from the first pin and the first pin retention plug, respectively.
10 . A turbine shroud assembly for use with a gas turbine engine, the turbine shroud assembly comprising:
a carrier segment including an outer wall, a first flange that extends radially inward from the outer wall, and a second flange spaced apart axially aft from the first flange and extending radially inward from the outer wall,
a blade track segment supported by the carrier segment and including a shroud wall and an attachment feature that extends radially outward from the shroud wall, and
a mount assembly including a pin that extends axially into an aperture formed in the second flange of the carrier segment, through the attachment feature, and into the first flange of the carrier segment so as to couple the blade track segment to the carrier segment and a pin retention plug that is press fit into the aperture of the second flange of the carrier segment axially aft of the pin and circumferentially aligned with the pin to block removal of the pin through the aperture in the second flange,
wherein the pin retention plug extends between a first axial end facing the pin and a second axial end opposite the first axial end, and wherein the pin retention plug is formed to include a removal aperture that extends into the pin retention plug from the second axial end thereof toward the first axial end,
wherein the removal aperture of the pin retention plug is formed to include threads to aid in removal of the pin retention plug from the aperture,
wherein the removal aperture does not extend entirely axially through the pin retention plug.
11 . The turbine shroud assembly of claim 10 , wherein the pin retention plug has a constant diameter along an axial length of the pin retention plug.
12 . The turbine shroud assembly of claim 10 , wherein the attachment feature of the blade track segment includes a first attachment flange that extends radially outward from the shroud wall and a second attachment flange axially spaced apart from the first attachment flange and extending radially outward from the shroud wall.
13 . The turbine shroud assembly of claim 12 , wherein the pin includes a forward pin segment that extends axially into the first flange of the carrier segment and through the first attachment flange and an aft pin segment that extends through the second attachment flange and the second flange of the carrier segment.
14 . The turbine shroud assembly of claim 13 , wherein the carrier segment further includes a third flange located axially between the first flange and the second flange and extending radially inward from the outer wall and a fourth flange located axially between the third flange and the second flange and extending radially inward from the outer wall, and wherein the forward pin segment extends through the third flange and the aft pin segment extends through the fourth flange.
15 . The turbine shroud assembly of claim 13 , wherein the forward pin segment and the aft pin segment are separate from one another so as to allow for independent loading.
16 . A method comprising:
arranging a blade track segment adjacent a carrier segment to support the blade track segment radially inward of the carrier segment, the carrier segment including an outer wall, a first flange that extends radially inward from the outer wall, and a second flange spaced apart axially aft from the first flange and extending radially inward from the outer wall, the blade track segment including a shroud wall, a first attachment flange that extends radially outward from the shroud wall, and a second attachment flange axially spaced apart from the first attachment flange and extending radially outward from the shroud wall,
inserting a pin into an aperture of the second flange, through the second attachment flange, through the first attachment flange, and into the first flange so as to couple the blade track segment to the carrier segment, and
inserting a pin retention plug into the aperture aft of the pin after inserting the pin to block removal of the pin through the aperture of the second flange, wherein the pin retention plug extends between a first axial end that abuts the pin and a second axial end opposite the first axial end, and the pin retention plug is formed to include a removal aperture that extends into the pin retention plug from the second axial end thereof toward the first axial end, the removal aperture of the pin retention plug being formed to include threads, and wherein the removal aperture does not extend entirely axially through the pin retention plug.
17 . The method of claim 16 , wherein inserting the pin into the aperture includes inserting a forward pin segment into the aperture and inserting an aft pin segment into the aperture after inserting the forward pin segment into the aperture, and wherein the forward pin segment and the aft pin segment are separate from one another.