Abstract:
A hollow drive shaft (20) with external splines (26) drives a hollow driven shaft (14) which has internal splines (32). The driven shaft (14) thickness is uniformly tapered in the spline area, while the drive shaft (20) has a constant thickness through part of the spline area, and then a uniformly reducing thickness toward the unloaded end. The teeth of the external spline are crowned with the peak toward the loaded end of the drive spline (26). A flat is located at this peak.
Abstract:
A coupling system including a sun gear coupling (32) and a ring gear coupling (158) for connecting the sun gear (36) and the ring gear housing (50) of a planetary gear train (26) to an external shaft (24) and an external mechanical ground (56) respectively are each characterized by undulant cross sections for accommodating parallel and angular misalignments. A ring gear deflection limiter (158), antirotation spline (190) and vibration damper are also included for enhanced operation.
Abstract:
A turbine shroud segment (64) fixed by hooks (72) in the stator of a gas turbine engine includes a serpentine cooling channel (78, 82) along at least one axial edge of the segment. In a particular embodiment, a turbine shroud segment (64) includes a leading edge serpentine cooling channel (78) and a trailing edge serpentine cooling channel (82). Both serpentine channels (78, 82) include ducts (86, 92) that extend to the serpentine channels (78, 82) from a point inward of adjacent retaining hooks (72). Cooling fluid flowing onto the outward surface of the segments flows through the ducts (86, 92) and along the serpentine channels (78, 82) to cool the leading and trailing edges of the segments.
Abstract:
Turbine blade (10) has a plurality of trailing edge discharge openings (28) discharging cooling air. The blade trailing edge has an increasing thickness "E" toward the tip end (16). Discharge openings with the shortened pressure wall "L" have lesser distances "L" toward the tip end.
Abstract:
A turbine vane for a gas turbine engine includes a platform with a cavity along the trailing edge having a double feed arrangement for injecting cooling fluid into the cavity. Various construction details are developed that provide a cavity having improved heat transfer due to the elimination of dead zones. In a particular embodiment, a turbine vane includes a platform cavity having a first inlet located on the pressure side of the platform and forward of an attachment rail and a second inlet located on the suction side and forward of the attachment rail. The cavity includes a plurality of trip strips and a plurality of film cooling passages. The trip strips extend from the corners of the cavity and are angled to encourage cooling fluid to flow into the corners. The film cooling passages direct the exiting cooling fluid to form a film of cooling fluid over the platform flow surface.
Abstract:
A method is taught for the preparation of fibers bearing a succession of concentric oxide layers by electrophoretic deposition of metal oxide upon the conductive fiber core. The oxide layers are deposited from sols, and may be the same, or differ, in successive layers.
Abstract:
A rotating drum (12) divided in axial spaced compartments with one of the compartments includes paddles (14) and coalescing material (16) to separate the fluid from the liquid and the other compartment includes stationary oil pumping (20) and water pumping means (30) and an energy recovery means (26) for effectively separating fluid such as oil from liquid such as water. Another embodiment includes a simplified version of the fluid/liquid separator adapted for zero gravity environment and includes means for purging the lines from air prior to pumping the liquid. An electrical sensing circuit including conductivity sensors (18) or an electronic controller including pressure sensors serve to control the rate of removal of the separated component or controlling said purging means.
Abstract:
Methods for improving the erosion resistance of composite airfoils are disclosed as are the resultant structures. Wire mesh materials are coated with an erosion-resistant coating, formed to the shape of the airfoil leading edge, and molded into the leading edge during airfoil fabrication.
Abstract:
Stator vanes (22) are potted within pockets (38) in composite inner shroud sections (36). The pocket depth is only that required for bond strength and vane damping. Ribs (48) extend inwardly and are adhesively bonded to the seal support ring (32, 34) which carries abradable seal surface.