Abstract:
A gas turbine engine rotor assembly including a rotor (12) having a radially outer rim (18) with an outer surface (204) shaped to reduce circumferential rim stress concentration between each blade (24) and the rim. Additionally, the shape of the outer surface directs air flow away from an interface between a blade and the rim to reduce aerodynamic performance losses between the rim and blades. In an exemplary embodiment, the outer surface of the rim has a concave shape (210) between adjacent blades with apexes located at interfaces between the blades and the rim.
Abstract:
A bushing assembly (24) as a means to enable guided movement of a shaft (17) in an opening of a housing (18) comprises a stationary bushing support (26) carried by a housing internal wall (20). The bushing support (26) has a support internal wall (28) defining a bushing support opening (30) through the bushing support (26) to receive a movable shaft (17). Carried by the shaft (17) is a removable wear sleeve (32) having a wear sleeve outer wall (34) in juxtaposition with and spaced apart from the support internal wall (28) to permit relative axial movement of the wear sleeve (32) with the shaft (17) within the bushing support opening (30). Disposed between and for contact with the support internal wall (28) and with the wear sleeve outer wall (34) is an anti-friction layer (36).
Abstract:
A gas turbine engine rotor assembly including a rotor (12) having a radially outer rim (18) with an outer surface (204) shaped to reduce circumferential rim stress concentration between each blade (24) and the rim. Additionally, the shape of the outer surface directs air flow away from an interface between a blade and the rim to reduce aerodynamic performance losses between the rim and blades. In an exemplary embodiment, the outer surface of the rim has a concave shape (210) between adjacent blades with apexes located at interfaces between the blades and the rim.
Abstract:
Gas turbine engine compressor component that has an airfoil such as a compressor blade with a metallic airfoil having a leading edge and a trailing edge and at least one laser shock peened surface extending radially along at least a portion of the leading edge and a region having deep compressive residual stresses imparted by laser shock peening (LSP) extending into the airfoil from the laser shock peened surface.
Abstract:
A variable stator vane (15) airfoil (31) is mounted on a button (54) centered about a rotational axis (20) and includes circular leading and trailing edges (52, 53) circumscribed about the rotational axis (20) at a button radius (R). Contoured pressure and suction sides (58, 59) extend from the circular leading edge (52) to the circular trailing edge (53) and are recessed inwardly from a perimeter (22) circumscribed about the rotational axis (20) at the button radius (R). One of upstream and downstream pressure side portions (24, 26) of the contoured pressure side (58) is straight and another of the upstream and downstream pressure side portions (24, 26) is curved. One of the upstream and downstream suction side portions (28, 30) is straight and another of the upstream and downstream suction side portions (28, 30) is curved. One of the upstream pressure side portion (24) and upstream suction side portion (28) is straight and another of the upstream pressure side portion (24) and upstream suction side portion (28) is curved.
Abstract:
A variable vane assembly (44) for a gas turbine engine includes a casing (50). The assembly comprises a variable vane (52) which includes a radially inner spindle (70) and a radially outer spindle (54). The radially inner and outer spindles are configured to rotatably couple the vane within the gas turbine engine. At least one of the radially inner and radially outer spindles comprises at least one groove (80) defined therein, at least one groove comprises at least one machined face (86), and a retainer for engaging the groove at least one machined face to securely couple the variable vane within the gas turbine engine, the retainer is configured to facilitate reducing wear of the variable vane.
Abstract:
A variable vane assembly (44) for a gas turbine engine includes a casing (50). The assembly comprises a variable vane (52) which includes a radially inner spindle (70) and a radially outer spindle (54). The radially inner and outer spindles are configured to rotatably couple the vane within the gas turbine engine. At least one of the radially inner and radially outer spindles comprises at least one groove (80) defined therein, at least one groove comprises at least one machined face (86), and a retainer for engaging the groove at least one machined face to securely couple the variable vane within the gas turbine engine, the retainer is configured to facilitate reducing wear of the variable vane.
Abstract:
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.