摘要:
A composite blading member (10) includes an airfoil (12) and a base (20) of composite material layers (40) and a platform (38) of composite material layers (40) interfused with the airfoil (12) and base (20). The platform (38) comprises a platform shelf (42) and a plurality of spaced-apart platform supports (44,46) integral with the platform shelf (42) and interfused with surfaces (26,28) of the base. Such blading member (10) was made by providing a partially cured airfoil-base preform (36) and a platform perform (38), including an airfoil shaped opening (43) therethrough and preforms of the platform supports (44,46). The airfoil-base preform (36) was inserted through the airfoil shaped opening (43) whereby cooperating surfaces of the platform perform (38) and airfoil-based preform (36) were in juxtaposition. The performs (36,38) were heated to partially cure them together. Then they were interfused with a binder compatible with material of the preforms (36,38) under conditions to substantially fully cure the structures.
摘要:
A rotor blade assembly (100) for a rotor (30) of a gas turbine engine (10) having an axis of rotation (8) includes a shank portion (106) formed from a ceramic matrix composite (CMC) material. The rotor blade assembly also includes a platform portion (104) formed from a substantially similar CMC material as that of the shank portion. The platform portion is coupled to the shank portion. The platform portion and the shank portion cooperate to at least partially define two opposing side portions (128) of the rotor blade assembly. The opposing side portions are angularly separated with respect to the axis of rotation. The rotor blade assembly further includes a damper retention apparatus (120). At least a portion of the damper retention apparatus is coupled to the shank portion. The damper retention apparatus includes at least one angled bracket apparatus (120) extending toward a circumferentially adjacent rotor blade assembly (100).
摘要:
A composite blading member (10) includes an airfoil (12) and a base (20) of composite material layers (40) and a platform (38) of composite material layers (40) interfused with the airfoil (12) and base (20). The platform (38) comprises a platform shelf (42) and a plurality of spaced-apart platform supports (44,46) integral with the platform shelf (42) and interfused with surfaces (26,28) of the base. Such blading member (10) was made by providing a partially cured airfoil-base preform (36) and a platform perform (38), including an airfoil shaped opening (43) therethrough and preforms of the platform supports (44,46). The airfoil-base preform (36) was inserted through the airfoil shaped opening (43) whereby cooperating surfaces of the platform perform (38) and airfoil-based preform (36) were in juxtaposition. The performs (36,38) were heated to partially cure them together. Then they were interfused with a binder compatible with material of the preforms (36,38) under conditions to substantially fully cure the structures.
摘要:
A compressor casing (34) is configured to surround blade tips (24) in a compressor stage. The casing includes stall grooves (36) with adjoining lands (38) defining respective local gaps with the blade tips. At least one of the lands (38a) is offset to locally increase (B) a corresponding one of the gaps larger than the nominal gap (A) for the casing to reduce tip rubbing thereat.
摘要:
Hybrid turbine airfoil components (30,100) containing a ceramic material, in which detailed features of the components (30,100) are formed of materials other than ceramic materials. The components (30,100) include a first component (44,102) formed of a ceramic-based material and a second component (46,104) formed of a metallic material. The first component (44,102) comprises an airfoil portion (38,102) and a nub (48,106), and the second component (46,104) is separately formed and attached to the first component (44,102) by casting the metallic material around the nub (48,106) of the first component (44,102). The second component (46,104) includes a platform portion (36,104) between the airfoil portion (38,102) and the nub (48,106) of the first component (44,102) and a dovetail portion (32,106) on the nub (48,106) of the first component (44,102). Each of the platform and dovetail portions (36,104;32,106) has at least one off-axis geometric feature (34,36,42,104) that results in the second component (46,104) having a more complex geometry than the first component (44,102).
摘要:
A shroud apparatus for a gas turbine engine includes: a shroud segment (18) comprising low-ductility material and having a cross-sectional shape defined by opposed forward (24) and aft (26) walls, and opposed inner (20) and outer (22) walls, the walls extending between opposed first and second end faces, wherein the inner wall defines an arcuate inner flowpath surface (32), wherein the shroud segment (18) includes: a radially-inward facing chordal forward mounting surface (36); and a radially-inward facing chordal aft mounting surface (40); and an annular case (48) surrounding the shroud segment (18), the case including: a radially-outward facing chordal forward bearing surface (58) which engages the forward mounting surface (36); and a radially-outward facing chordal aft bearing surface (68) which engages the aft mounting surface (40) of the shroud segment.