Abstract: A gas path seal suitable for use with a turbine engine or compressor is provided. A shroud wearable or abradable by the abrasion of the rotor blades of the turbine or compressor shrouds the rotor blades. A compliant backing surrounds the shroud. The backing may be made of corrugated sheets or the like with adjacent layers having off-set corrugations, with axes of the folds parallel to the rotor axis. The sheets may be bonded together at points of contact by brazing, welding or the like. In another embodiment a compliant material is covered with a thin ductile layer. A mounting fixture surrounds the backing.

Abstract: Jet noise generation occasioned from the gaseous streams in the coaxial streams of a turbofan engine when they as well as the ambient stream encounter is reduced by designing the engine so that the value of the true velocity of the outer stream is substantially higher than the value of the true velocity of the inner stream. It is contemplated that for a turbofan engine the fan stream and primary or engine core streams are inverted so that the higher velocity stream would be in the outer coaxial passage immediately upstream of the point where the streams discharge to ambient. A modified conventional lobe mixer is utilized to invert flow streams.

Abstract: The subject compressor is of the centrifugal type having a rotatable impeller with hub and shroud sides and a diffuser surrounding the impeller, the diffuser having spaced side walls with vanes spaced around the impeller to provide passages for receiving fluid discharged from the impeller, the diffuser also having chambers formed on the hub and shroud sides and restricted openings along lines of static pressure in the diffuser passages establishing communication between the chambers and the diffuser passages near the inlet ends thereof whereby the pressures at such passage inlet ends will be equalized during the operation of the compressor and the tendency of the compressor to stall prematurely thereby reduced. Suitable communication between the chambers on the hub and shroud sides may be provided.

Abstract: An outer air seal circumscribing the tips of the rotor blades of a rotary machine is disclosed. Techniques for limiting the radial clearance between the tips of the blades and the outer air seal at steady state conditions are developed. Structure independent of the machine case for isolating the thermal response of the outer air seal from the thermal response of the machine case is discussed and illustrated.

Abstract: In a fan mounting arrangement in which a centrifugal fan housing has slide rails which are received in tracks of the fan base plate, the housing has an inclined flange along the edge of the fan discharge opening which leads as the housing is being installed, this flange being elevated by ramp means on the track as the housing approaches its final position so that the flange clears the edge of the opening in the fan base plate and pulls up the leading end of the fan housing for reducing air leakage between the fan housing discharge opening and the fan base plate. Additionally, the slide rails are provided with ramping means adjacent the trailing edge to elevate the trailing edge of the fan housing as it approaches its final position. The slide rails are fastened to the base plate after the fan housing is in its fully slid-in position, to prevent sliding of the housing relative to the base plate and also to insure the fan housing is pulled up tightly to the base plate.

Abstract: This invention relates to a method of moving a set of adjustable trailing vanes in a gas turbine engine of the "split-shaft" type. The vanes are moved by an adjusting ring which is made to completely encircle the casing of the turbine and connect to each vane by means of a rotator assembly. Provision is made to allow for connection of the turbine casing so that the binding or flexing of the adjustor ring assembly during thermal cycling is avoided. A series of pitman arms are pivotally interconnected between the adjustor ring assembly and each vane rotator assembly. The vane rotator assembly is provided to intercouple the adjustor ring assembly to each pivoting vane while at the same time providing some radial flexibility for the vane itself to prevent binding of the blade and actuator during thermal cycling. Provision is also made to bias each pivoting vane in the particular direction in the turbine during the operation of the turbine.

Abstract: A centrifugal pump which is easy to clean, simple to assemble and disassemble, and economical to manufacture is disclosed. The pump comprises two cast metal casing members, one of which has an integral volute wall and the other of which has an oval partition providing an inlet plenum opposite the volute wall. A wear plate is interposed between the casing members to channel fluid in the desired direction through the pump. An impeller is mounted for limited axial adjustment on its engine shaft to adjust its clearance with the wear plate. The impeller also has specially-designed slinger teeth which function to minimize wear of the impeller shaft seal.

Abstract: A turbine shroud segment is supported by a pair of eccentric shafts which are rotated in response to the engine operating temperatures to selectively vary the radial position of the shroud segment so as to minimize the radial clearance between the shroud segment and the rotatable blades circumscribed therein during variable operating conditions. The bimetal actuator moves in response to changes in the temperature of the cooling air to rotate a ring gear which in turn rotates the eccentric shafts to modulate the radial position of the shroud segment. By proper selection of component design specification and operating parameters, the radial clearance can be minimized during steady-state operating conditions without attendant rubbing during transient operating conditions.

Abstract: An axial-flow reversible turbine comprises a nozzle assembly and a wheel rotor mounted consecutively in the direction of the flow of the working medium and provided with two-section blades. One section of said blades forms the flow duct of the direct-rotating turbine and the other section, the flow duct of the counter-rotating turbine. The flow duct of the direct-rotating turbine incorporates a valve in the form of variable-incidence airfoil vanes intended to deny the access of the working medium into said duct. The inside diameter of the flow duct of the counter-rotating turbine is larger than the outside diameter of the flow duct of the direct-rotating turbine. The gas flow ducts of the direct- and counter-rotating turbines communicate with each other through a cylindrical bushing with ports.

Abstract: A clutch mechanism suitable for connecting a rotatable member to an output shaft of a motor, which mechanism comprises a body which is attachable to the output shaft and a resilient arm, one end of which is fixed to the body the other end of which is capable of engaging the rotatable member or part thereof, wherein the body is capable of gripping the output shaft in secure frictional contact to transfer rotational drive from the output shaft to the rotatable member only when the rotatable member is not restrained against rotation.

Abstract: Wear liners in abrasive material handling apparatus or equipment in positions to receive the impact and scouring by hard materials such as sharp rocks, broken glass, tin cans, metal pieces and other hard particles at all impact angles including acute angles and at high velocities. Such liners comprise a layer of vulcanized rubber or equivalent material having an impact receiving surface that is smooth and continuous, with one or more sheets of abrasive resistant wire mesh embedded in said layer parallel with and spaced below said surface, and with said sheets, when more than one, spaced from each other and parallel. The rubber or rubber-like material is substantially inseparably vulcanized or bonded to the wires of said sheet or sheets and is of approximately 60 Shore durometer hardness.

Abstract: A gas turbine engine has a turbine vane case, an outer combustion case and inner vane case along with an air seal located in circumferential surrounding relationship to a circumferential row of stator vanes defining a turbine nozzle assembly upstream of a high pressure turbine stage. Individual stator vanes can be replaced without removing the high pressure turbine stage by configuring an index vane to be removably secured to an inner support band by means of a spring loaded pin and configuring each of the remaining vanes in the vane row to have a side slotted base secured to the inner band and removable therefrom by rotation of each of the individual vanes in a direction opposite to the tangential gas load thereon.

Abstract: Apparatus for deriving a rotational motion from air currents including first and second coaxial annular members spaced from each other along their axes by axial struts and a plurality of blade assemblies carried by the struts. In a preferred embodiment, the annular members are formed of circular I beams and the apparatus is supported for rotation about the axes of the annular members by rollers engaging the web of the I beams. The rollers may be carried by first and second posts with one of the posts being rotatable about the other such that the apparatus can accommodate changing wind directions. The blade assemblies may include an impeller hingedly secured to a cross-beam extending between adjacent struts with each impeller being individually spring biased to present more or less surface to the air current, dependent on its velocity.

Abstract: An integral pump and drive shaft assembly in which the pump has a generally cylindrical side wall, a generally vertical back wall, and a front wall having an inlet opening; an impeller is rotatably mounted in the housing so formed and the impeller also includes a generally vertical rear wall and front wall and also an inlet eye centrally located in the front wall; the impeller also has a series of circumferentially space apart and curved vanes located between and fixed to its front and rear walls. A tubular coil heat exchanger is located in a forward portion of the pump housing whereby water entering the inlet opening passes over the heat exchanger. A diffuser is mounted on the rear wall of the pump housing and is concentric with the impeller; the diffuser also has a series of circumferentially spaced curved vanes for receiving water which is discharged from the impeller. The vanes of the diffuser are curved in a direction opposite to the direction in which the impeller vanes are curved.

Abstract: In an axial flow compressor including a rotor wheel having a plurality of rotating blades mounted thereon, said rotor being arranged to rotate about a central axis of the compressor, there is provided an aerodynamically profiled ring arranged concentrically to the compressor axis in front or upstream of the plurality of rotating blades in order to define between an outer surface of the profiled ring and an inner wall of the compressor casing an annular flow channel which converges in the direction of flow through the compressor. A plurality of stationary blades are located upstream of the profiled ring.

Abstract: Multi-purpose end casing for ring type multi-stage centrifugal pumps adaptable respectively for the side suction end casings and side discharge end casings of horizontal, vertical and dry pit side suction multi-stage ring type centrifugal pumps, are disclosed as having a generally cylindrical body portion having at least four tie rod lugs extending therefrom at generally 90.degree. intervals. Each of the tie rod lugs has an ample adapter bearing surface, and a rabbet fitted surface formed thereon to render the same utilizable with a variety of adapters as may be required in different types of pumps on which the end casings are used. Machined, foot mounting surfaces are provided on at least three sides of the respective side suction end casings and side discharge end casings to enable the ready attachment and detachment of pump casing mounting feet.

Abstract: A gas turbine engine having cooled rotor blades is shown wherein the coolant is delivered to a stationary chamber adjacent the blades. A portion of the coolant is directed to seals between the stationary structure and the rotor and another portion is directed between adjacent rotor discs for entry through the downstream disc into the blades supported therein. The portion flowing through the seals is prevented from flowing into the fluid directed to the discs. Also, the coolant to the discs is given a velocity vector substantially equal to the velocity vector of the openings through the disc to the blade root to minimize pumping losses and temperature increases in the coolant during its delivery to the blade.

Abstract: A pump casing for high pressure pumps is composed of two halves each half being provided with a liner. The two casing halves are joined by flanges which are recessed to receive corresponding flanges of the liners. At least one groove is provided in the recess formed by the casing flanges to receive and retain part of the liner flange material.

Abstract: A centrifugal pump having a casing with a medially disposed partition for defining therein a flow chamber on one side of the partition and a pumping chamber on the other side thereof, said flow chamber having a side inlet for fluid to be pumped and said pumping chamber having an outlet for pumped fluid. The partition has a generally disposed central opening therethrough to provide communication between the flow chamber and the pumping chamber and said flow chamber forms a fluid flow path from the side inlet to the opening in said partition of generally curvilinear shape which is spaced from and about the axial line of the pump. A driven shaft is rotatably mounted in the axial line of the pump.

Abstract: A turbine casing for superchargers having a baffle wall formed therewithin with the inclination inclined at about 30.degree. to 35.degree. relative to a perpendicular to the axis of a turbine impeller so that the inside of the turbine casing is formed into two flow paths where the exhaust pressure wave is passed through. One of the flow paths has on the side wall thereof opposite to the baffle wall an inclined surface inclined at about 10.degree. to 15.degree. relative to the perpendicular in an opposite direction to the inclination of the baffle wall. The other flow path has on the side surface thereof opposite to the baffle wall an inclined surface inclined at about 55.degree. to 60.degree. relative to the perpendicular in the same direction as the inclination of the baffle wall. Each flow path is uniform in cross section throughout its entire volute.