Abstract: A radial turbomachine with axial thrust compensation includes a rotor disc with main bladed rings. The main bladed rings together with auxiliary bladed rings delimit a plurality of concentric front main chambers at different pressures. A plurality of concentric rear annular main chambers, each in fluid communication with a respective front main chamber and at the same pressure as the respective front main chamber, is delimited between a rear face of the rotor disc and a fixed casing. The concentric front main chambers are delimited by front areas of the rotor disc and concentric rear annular main chambers are delimited by rear annular areas of the rotor disc. All the rear annular areas are identical to the respective front areas except for one, which is a compensation area configured to compensate, at least in part, for the thrust of external pressure acting on the shaft.

Abstract: A fan includes a frame, an impeller, and a motor. The impeller is disposed in the frame and includes a hub, a plurality of annular blades, and a plurality of spacers. The annular blades are stacked along an axial direction of the hub and disposed around the outer periphery of the hub. The extension directions of the annular blades are perpendicular to the axial direction of the hub. Each of the spacers is disposed between the two adjacent annular blades. The motor is disposed in the frame and drives the impeller to rotate to induce an airflow. The thickness of each annular blade is smaller than or equals to 0.2 mm.

Abstract: Vacuum pump for pumping gas from a process chamber, the pump comprising: a rotor supported for rotation in a pumping chamber by a drive shaft, the shaft extending through a shaft bore in a wall of the pumping chamber extending transversely to the drive shaft, and a seal arrangement provided between the shaft and the transverse wall for resisting the passage of gas through the shaft bore, wherein on rotation of the rotor gas is pumped from a low pressure region at an inlet of the pumping chamber to a high pressure region at an outlet of the pumping chamber, and wherein the rotor and the transverse wall are spaced apart by an axial clearance along which back leakage of gas can flow from the high pressure region to the low pressure region, and an additional leakage path for back leakage is formed spaced away from the seal arrangement along which gas can flow without contact with the seal arrangement so that the amount of gas which contacts the seal arrangement during use of the pump is reduced.

Abstract: A turbine-pump system bowl assembly for use with flowing liquid in a liquid conduit has an impeller subassembly that includes multiple axially abutting impeller members.

Abstract: A rotor assembly is disclosed herein. The rotor assembly includes a hub disposed for rotation about an axis of rotation. The rotor assembly also includes at least one blade fixed with the hub for concurrent rotation with the hub. The at least one blade extends along a height axis radially outward from the hub with a root portion proximate to the hub at a first end of the height axis and an airfoil portion extending radially inward from a second end of the height axis opposite the first end. The rotor assembly also includes a sheath extending at least partially around the root portion. The sheath is pivotally engaged with the at least one blade to pivot about the height axis and allowed to weathervane to reduce noise.

Abstract: A fan system is disclosed having a forward fan stage configured to pressurize an airflow and an aft fan stage having a tip-fan configured to pressurize a first portion of a pressurized air flow from the forward fan stage wherein the aft fan stage is driven by a second portion of the pressurized airflow.

Abstract: A multi-stage centrifugal fan is provided and includes first and second stages of a rotor having substantially axially aligned rotor vanes formed to impart energy to a fluid moving in an outward radial direction when the first and second stages of the rotor rotate about a centerline and a stator having stator vanes radially interposed between and substantially axially aligned with the first and second stage rotor vanes.

Abstract: A paddle wheel rotatable about an axis and exposed to radial inward and crosswise water flow has a hub on the axis and about which the wheel is rotated in a rotation direction about the axis and a plurality of angularly spaced blades spaced radially outward from the hub, forming spaces through which water can flow, and each formed by a plurality of radially spaced arcuate elements each in turn having a radially outer end and a radially inner end. These elements are each concave between the respective ends toward the incoming water flow with the radial outer ends more widely spaced than radial inner ends such that each element forms an acute angle with the adjacent element or elements and the spaces between the blades narrow in a direction of flow of water through them.

Abstract: Embodiments are directed to micro-scale or meso-scale devices having hydraulic or pneumatic actuation mechanisms incorporating bearings elements (such as ball bearings, cylindrical bearings, interference bearings, or hydrostatic bearings. Devices of some embodiments are turbines. Some devices may function as medical devices. Other embodiments are directed to multi-layer, multi-material electrochemical fabrication methods for producing such devices.

Abstract: In one embodiment, a rotary device includes a multiwall nanotube that extends substantially perpendicularly from a substrate. A rotor may be coupled to an outer wall of the multiwall nanotube, be spaced apart from the substrate, and be free to rotate around an elongate axis of the multiwall nanotube.

Abstract: The present invention relates to the field of blades, particularly fan blades, intended for turbojets, particularly of the aeronautical type. Its objective is to provide a fan blade the features of which will enable the number of fan blades to be reduced while at the same time providing satisfactory performance. According to the invention, the fan blade comprises a plurality of aerodynamic parts which are superposed in a radial direction Z and the number of aerodynamic profiles varies from one aerodynamic part to the other.

Abstract: The invention relates to a wheel (R) of the Francis type that comprises a ring (1) with revolution symmetry about the rotation axis (Z) of the wheel (R), and curved blades (21, 22) connected to the ring (1) and each having an outer peripheral edge (212, 222) and an inner central edge (211, 221). The connection points (B21, B22) between the ring (1) and the inner central edges (211, 221) of the blades (21, 22) are located on a same circle (C10) centred on the axis (Z). The connection points (A21, A22) between the ring (1) and the outer peripheral edges (212, 222) of the blades (21, 22) are located on at least two distinct circles (C21, C22) (D21, D22) centred on the axis (Z).

Abstract: In one embodiment, a rotary device includes a multiwall nanotube that extends substantially perpendicularly from a substrate. A rotor may be coupled to an outer wall of the multiwall nanotube, be spaced apart from the substrate, and be free to rotate around an elongate axis of the multiwall nanotube.

Abstract: IMPROVED INLET PASSAGEWAY AND SEALING IN A TURBINE WIND POWER GENERATING SYSTEM wherein sharp very small radii of curvature end portions at the mouth or inlet to the passageway avoid turbulence thus enhancing inlet airflow. Transitional portions of the passageway are arranged at angles of inclination with the horizontal to provide for smooth airflow to a rear impact and transfer portion of the passageway which takes a concave parti-circular configuration. Turbulence adjacent the end portions and within the inlet passageway is thus avoided. Sealing means between an annular shroud or blade tip ring and an adjacent stationary ring take the form of labyrinth seals minimizing loss of airflow through the blades.

Abstract: A multi-stage radial flow compressor and turbine includes a rotor having a first plurality of blades and a second plurality of blades radially outward from the first plurality. A stator has a plurality of blades radially positioned between the two sets of rotor blades. The stator also includes a plurality of combustors positioned radially outward from the stators. The rotor also has turbine blades radially outward from the combustors which are driven by the combusted gas.

Abstract: The invention concerns a sluice feeder comprising an inlet (1), an outlet (11), and a rotor (2), into which sluice feeder material to be fed from a first medium to a second medium sealed from the first medium is fed to the inlet (1). The inlet (1) is directed towards the centre portion of the rotor (2), the rotor (2) and a cooperating stator (7), respectively, show at least a radial opening (5, 8) each and are provided so that at least one pocket (9) is formed, which alternating opens and seals upon rotation of the rotor (2). The material is thrown radially outwards by the rotor (2) to the pocket (9) to finally be emptied from the pocket (9) to the outlet at the same time as the pocket (9) is sealed towards the inlet (1) by means of the stator (7).

Abstract: The radiator cooling fan replacement to increase engine efficiency is a multi-stage centrifugal air pump supercharger that replaces the radiator fan while at the same time increases air density of its output air. The centrifugal air pump comprises a number of radial air chambers. Each air chamber includes a number of rotating blades. The rotating blades apply a centrifugal force to the air increasing the density of the air. The density of the air gradually increases as the air moves from one chamber to the next until it is forced out of the centrifugal air pump to the engine block. Before entering the engine block, the compressed air from the air pump passes through an air filter that cools the air.

Abstract: The present invention relates generally to systems and methods for facilitating the movement of fluids, transferring mechanical power to fluid mediums, as well as deriving power from moving fluids. The present invention employs an impeller system in a variety of applications involving the displacement of fluids, including for example, any conventional pumps, fans, compressors, generators, circulators, blowers, generators, turbines, transmissions, various hydraulic and pneumatic systems, and the like.

Abstract: A gas friction pump including a rotor located in the pump housing and formed of a plurality of coaxial first cylindrical elements, and a stator located in the housing and formed of a plurality of second cylindrical elements coaxial with the first cylindrical elements and surrounding respective first cylindrical elements, with the first cylindrical elements or the second cylindrical elements having smooth inner and outer surfaces, and another ones of the first cylindrical elements and the second cylindrical elements have a plurality of parallel discharge channels formed on their inner and outer surfaces, arranged one beneath another and separated by a respective plurality of webs, the parallel discharge channels defining a plurality of parallel discharge chambers forming a plurality of parallel operating pumping chambers for pumping gas form the suction port to the discharge port.

Abstract: A rotor-stator assembly includes a rotor and a stator, each of which has a plurality of teeth wherein the height of the teeth is less than approximately one twentieth the diameter of the rotor-stator. According to a presently preferred embodiment of the invention, the height of the teeth on the rotor-stator is approximately 1/48th the diameter of the rotor-stator. A twelve inch diameter rotor-stator having teeth 1/4" high can be rotated at 3600 rpm with 40 HP when mixing materials with water-like viscosity. The arrangement of the teeth on the rotor-stator is preferably concentric with radial grooves, but angled grooves may also be used. The teeth my have a triangular or square profile and the dimensions of the teeth, other than their height, may vary considerably.

Abstract: A containment system for a radial flow turbine assembly includes a housing assembly, and a turbine rotor journalled for rotation about an axis and having a hub portion and a generally tapering disc portion extending radially outward from the hub portion. An annular nozzle assembly normally secured in the housing assembly against rotation forms a tapered rotor chamber within which the rotor rotates with minimum axial and radial clearance between the rotor and the chamber. A plurality of support struts extend axially inward from the nozzle assembly to a minimal axial and radial clearance with the hub portion of the rotor and forms a first stage of containment. The rotor must first break through the nozzle struts and separate the nozzle assembly. A rotatable nozzle assembly then absorbs some of the force by rotating in the housing assembly and containment ring. An armored containment ring stops the fragments that escape the nozzle assembly and finally, an outer housing provides still further containment.

Abstract: A combination vacuum pump, low friction bearing and seal assembly is provided in which a rotor relatively rotatable with respect to a stator has two sets of radially spaced, concentric spiral grooves. As the rotor rotates, one set of grooves forces sufficient ambient air between confronting surfaces of the rotor and stator to keep them axially spaced and provide a low friction bearing. Another set of grooves forces sufficient air from the vessel and through a one-way air exit to evacuate the vessel. A restriction created by the axially spaced confronting surfaces substantially prevents ambient air from moving radially inwardly to the evacuated vessel, as well as trapping the ambient air to maintain the axial spacing. Any ambient air passing through the restriction is dumped back to ambient through the same air exit, thereby keeping the evacuated vessel sealed.

Abstract: A centrifugal pump-compressor includes a chamber adapted to rotate about a predetermined axis and vanes extending radially with respect to such axis and adapted to impel a fluid at least in the radial direction of the chamber. The vanes induce a primary flow of the fluid in the chamber. The apparatus further includes a series of venturis disposed in the chamber and adapted to receive the primary flow therethrough. The outwardly disposed venturis generally overlap the immediate adjacent inwardly disposed ones. A diffusing sink is positioned between the venturis. The primary flow of fluid is accelerated as it passes through each of the venturis, its velocity then decreases and the pressure in the fluid increases in each of the diffusing sinks. In this manner the energy of the fluid is converted successively from kinetic to potential forms as it moves outwardly through the chamber.

Abstract: The invention relates to an equipment for the delivery of slurries and for their refinement during delivery, which has a housing provided with axial inlet opening and tangential discharge opening, furthermore a disc-shaped stationary part in the housing with a concentric opening adjoining the inlet opening, and disc-shaped rotary part arranged opposite the stationary part. Rods are concentrically arranged according to the invention alternately on the stationary part and rotary part in such a way, that the rods of the stationary part point toward the rotary part, and the rods of the rotary part point toward the stationary part, and the rotary part has a jacket surrounding the rods arranged along the largest diameter circle of the stationary part, said jacket being perforated with holes in radial direction.

Abstract: This invention relates to a centrifugal pump characterized by a pair of novel self-aligning impeller hub seals located in the high pressure cavity and subjected to the influence thereof to maintain them in fluid-tight sealed contact with the adjacent cavity walls to which they are loosely fastened. The invention also encompasses a novel thrust-type hub seal subassembly that is continually biased into fluid-tight sealed contact with an annular abutment on the impeller hub, the latter element being the only surface in relatively movable frictional engagement with the seal with such engagement being face-to-face so that the thrust compensates for any wear therebetween. Another feature of the invention is the cooperative relationship between the self-aligning impeller hub seals, the thrust-type hub seal and pressure relief passages in the impeller hub whereby the thrust seal is isolated from the relatively higher fluid pressure in the high pressure cavity.

Abstract: A fluid flow machine has at least one disc-shaped rotor provided with flow channels for a flow medium, the intake and exit openings of said channels being located axially of said rotor. The distance of the intake openings from the axis of rotation is different from that of the exit openings. Each flow channel has a radially outer and a radially inner deflector elbow having two legs extending at an angle of about 90.degree. relative to one another, one leg of one elbow leading to an intake opening and one leg of the other elbow leading to the respective exit opening. The respective other legs of the two elbows are aligned with a substantially radial connecting section interconnecting the two deflector elbows. A higher pressure drop per stage is obtained by providing that the intake openings as well as the exit openings are located at the same axial surface of the rotor.

Abstract: A turbofan engine is provided with a flow splitter at the inlet of the compressor with preloaded inner and outer walls. The inner wall and outer wall are positioned generally coaxially of each other and form a generally hollow, annular shell structure which is stressed in the axial direction. The inner wall comprised of two axially separable ring sections is placed in compression while the outer wall is placed in tension. The axial stressing compensates for transient growth differentials due to thermals in the inner and outer walls, also for tolerance buildup between the components forming the walls and for deflections that are created by blow-off loads transmitted through the walls from inlet guide vanes.

Abstract: The stain removal apparatus uses alternating rows of teeth between a rotor and the housing to clean paper pulp during passage of the paper pulp by the teeth. Check members are employed adjacent the teeth of the innermost row of teeth to preclude accumulations of material in front of the teeth. The check members are of the same thickness as the teeth at points adjacent the teeth while being shaped to merge into the rotor or housing at the end remote from the teeth.

Abstract: A simple by-pass type jet propulsion engine includes a centrifugal compressor and a centripetal turbine mounted back-to-back and a combustion apparatus disposed radially outwardly of the turbine. These constitute the core engine; the fan part of the engine is provided by fan blades extending outwardly from the rotor blades of the core engine compressor which discharge through outlet guide vanes into a fan duct lying radially outwardly of the combustion apparatus. The fan outlet guide vanes or the fan duct nozzle may be variable to substantially close the fan duct for starting the engine. Part of the air flows from the compressor to the combustion apparatus of the core engine through hollow turbine nozzle vanes.