Abstract: A turbine shell assembly includes radially inner and outer shell components; axial alignment fits on the inner and outer shell components, each alignment fit comprising a male fit component on one of the inner and outer shell components and a female fit component on the other of the inner and outer shell components, the female fit component comprising a pair of flanges forming a U-shaped channel with opposed faces, and the male fit component comprising a projection received within the U-shaped channel; and a pair of axial alignment keys, each key having a mounting flange for securement along an outer edge of a respective one of the pair of flanges and an alignment flange engaged along a respective one of the opposed faces.

Abstract: A ventilation fan for a PC has a plurality of blades disposed around a rotary hub. Each blade is shaped differently from the others to an extent that the air volume handling capacity of the blades is not substantially diminished. The noise level generated by a fan in a specific frequency range is caused by the change in air pressure and is attributable to the symmetry of the fan blade shapes. By altering the shape of the individual blades, the noise level due to pressure change is attenuated. Each blade slightly differs in shape from the others to eliminate air pressure changes. The noise level of the fan is suppressed within an allowable range even when the number of blades and the rotational speed of the fan are increased for better air flow. Preferably, the shape of each blade is varied from the others by putting an adhesive such as putty on the front surface and/or the back surface thereof near the hub.

Abstract: An impeller for a hydraulic power transmitting apparatus has a shell and a plurality of blades fixed to the shell. Each of the blades has a blade main body and a fixing flange which is bent at an angle relative to the blade main body. The shell and the fixing flange are placed one on top of the other and are pressed together at a fixing point such that a hollow cylindrical projection having a bottom is formed. The projection is made up of a diametrically expanded portion along a bottom outer periphery of that member out of the shell and the fixing flange which lies on an inner side in the projection. The expanded portion is thrusted into that member out of the shell and the fixing flange which lies on an outer side in the projection.

Abstract: A large number of nozzle vanes 16 are arranged in an annular channel 10 formed between opposed surfaces of turbine housing 1 and turbine shroud 9. A recess 20 is constructed on the formation surface of the annular channel 10 of the turbine housing 1, and in this recess, a clearance control plate 21 is disposed so that the clearance C between the plate and nozzle vanes 16 becomes constant. Two gaskets 25 whose outer rims are formed in a bead shape are laid in a gap S on the rear side of clearance control plate 21, in such a manner that outer rims of the gaskets separate from each other. In this configuration, outer rims widen when gas pressure is applied, and gas can be sealed stably without leakage.

Abstract: A variable-pitch boat propeller has a hub centered on and rotatable about a hub axis and formed with a radially out-wardly open pocket having a predetermined inside diameter and centered on a vane axis extending generally radially of the hub axis and a mounting plate rotatable in the pocket about the vane axis and having an outer face. A ring fixed in the pocket and having inner and outer peripheries bears radially inward of the hub axis on the mounting plate. An inner seal is provided between the inner ring periphery and the plate and an outer seal between the outer ring periphery and the pocket. A vane extending along the vane axis has a base of an outside diameter smaller than the inside diameter of the pocket and fitting in the pocket on the face of the plate. A screw or the like releasably secures the vane base to the plate face, and mechanism pivots the plate in the pocket about the vane axis.

Abstract: The present invention relates to a turbine housing (1) having an inner housing (2) which is surrounded by an outer housing (3), the inner housing (2) and the outer housing (3) each having a first, upper partial region (5) and a second, lower partial region (6), and having an inner-housing outer surface (7) and an outer-housing inner surface (8) which are positioned opposite one another, with a distance between them. At least in a part of the first partial region (5), the inner-housing outer surface (7) has a lower heat transfer through radiation to the opposite outer-housing inner surface (8) than at least in a part of the second partial region (6) of the inner-housing outer surface (7). This can be achieved by means of suitable surface coatings in the respective regions which have different absorption and/or emission coefficients (a1, a2).

Abstract: A fan blade includes an airfoil having a root and an integral platform. The platform includes forward and aft ends and arcuate first and second sides therebetween. The airfoil root is laterally offset closer to the platform first side than the second side. Impact loads with a trailing blade during a blade-out failure are accordingly distributed for reducing peak loading in the trailing blade and damage thereto.