Abstract: A runner for a hydraulic turbine or pump includes a plurality of blades, each blade being defined by a pressure surface, an oppositely facing suction surface, a leading edge and a spaced apart trailing edge. At least one blade has a device for supplying a flow of oxygen containing gas to the trailing edge of at least one of the blades. The profile of the suction side surface of the blade along a cross section through a point P1 and a point P2 is concave. The point P1 is located on the suction side surface of the trailing edge where an opening is located, the point P2 is spaced apart from the point P1 by less than 3% of the runner outlet diameter D and the point P2 is located upstream of the point P1 on a line perpendicular to the trailing edge starting at the point P1.

Abstract: A flush toilet resting over a floor and comprising: a toilet bowl; a first water conduit comprising a first conduit—first end and a first conduit—second end; a second water conduit, comprising a second conduit—first end and a second conduit—second end, and; at least one water pump, the at least one pump water-powered and not electrically powered; wherein: the first conduit—first end is operationally connectable to an external water pipe comprising pressurized water; the first conduit—second end is positioned to allow providing the pressurized water to the water pump; the second conduit—first end is operationally connected to receive water from the water pump; wherein the water pump is positioned proximal to the bowl and between the bowl and the floor, and wherein the toilet is configured such that action of water on the at least one pump allows the flush of at least 6 liters per second.

Abstract: A heating, ventilating, and air conditioning (HVAC) system that includes a fan. The fan includes a plurality of blades coupled to a hub. A shroud is coupled to the plurality of blades, wherein the shroud focuses a flow of air along a rotational axis of the fan and reduces the flow of the air radially outward from the fan.

Abstract: A device for circulatory support of the heart with holding means implanted intracardially in the left or right ventricular outflow of the heart by catheter, using an endovascular method, through a femoral access or a percutaneous transventricular, transseptal, transapical or transvenous access, the holding means comprises anchoring means fixed in the subcommissural triangle underneath the aortic valve and the pulmonary valve, in the flow direction of the blood on the ventricular side of the aortic valve and the pulmonary valve, a pump fixed in the holding means by a catheter, using an endovascular method, through a femoral access or a percutaneous transventricular, transseptal, transapical or transvenous access, the pump can be inserted releasably into the holding means after the holding means has been fixed by the anchoring means in the subcommissural triangles underneath the aortic valve and the pulmonary valve, or is connected to the collapsible and expandable anchoring means.

Abstract: An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Abstract: A compressor having a housing and a rotor, the rotor having an impeller at least on one side; a compressor chamber being formed between the impeller and the housing, the rotor being rotationally mounted, an annular sealing channel being formed between the rotor and the housing, the sealing channel being routed from the compressor chamber to a zone having a lower pressure; a throttling section being provided in the sealing channel; the sealing section being configured in closer proximity to the low-pressure zone than to the compression chamber.

Abstract: A turbomachine and method for operating a turbomachine comprising a first rotatable component and a second rotatable component each defining a rotatable speed mechanically independent of one another, and an electric machine electrically coupled to the first rotatable component and the second rotatable component such that a load level relative to the first rotatable component and the second rotatable component is adjustable is generally provided.

Abstract: The invention relates to a pump device having a pump (8) and an energy supply device (5, 18), wherein the pump has a conveying element (9, 11) which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least of first element (9, 9a, 10, 10?, 11) of the pump has a different shape and/or size in the transport state than in the operating state. The operating safety of such a pump device is increased by a detection device (12, 20, 21, 22, 23, 24, 25, 27, 28, 29) which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor.

Abstract: A modular pump platform includes a pump head module, a pump motor module, an electronics module and a separable tray. The pump motor module includes a pump motor having a rotary output removably coupled to a crank shaft of the pump head, the pump motor being one of multiple types of pump motors, and the pump motor module being detachably connected to the pump head module. The electronics module includes an electronic control circuit configured to control operation of the pump motor, the electronic control circuit being one of multiple types of electronic control circuits corresponding to the types of pump motors. Each of the pump head module, the pump motor module and the electronics module is detachably connected to the separable tray. At least the pump motor module is interchangeable with another pump motor module comprising a pump motor of another type.

Abstract: A multistage turbomachine is disclosed, comprising a casing with a fluid inlet and a fluid outlet and a plurality of stages arranged in the casing. A flow path extends from the fluid inlet to the fluid outlet through the sequentially arranged stages. Each stage is comprised of a rotating impeller and an electric motor embedded in the casing and arranged for rotating the impeller at a controlled rotary speed. Each electric motor comprises a motor rotor, arranged on the impeller and integrally rotating therewith, and a motor stator stationarily arranged in the casing. Pairs of sequentially arranged impellers are configured for rotation in opposite directions.

Abstract: A circulatory support device for an in-vivo heard includes a pump-holder that is placed in an outflow tract of the heart. The pump-holder includes an anchor that is placed in the subcommissural triangles underneath the aortic valve or the pulmonary valve of the heart in a blood flow direction. The device also includes a pump that is placed in the pump-holder. The pump may be placed in the pump holder after the pump-holder is placed in the subcommissural triangles. Once in place, the circulatory support device does not extend through the aortic valve or the pulmonary valve.

Abstract: A cooling fan includes a boss section (12) connected to a rotary drive source, a plurality of blades (13) protruding outward from the boss section in a radial direction, and a cylindrical ring member (14) configured to annularly connect the vicinities of end sections outside in the radial direction of the plurality of blades. The plurality of blades (13) protruding outward from the boss section (12) in the radial direction are connected by the cylindrical ring member (14) in the vicinity of the end section outside in the radial direction. An air inlet groove (16) is formed at an end section in an axial direction of an air suction side of the ring member (14). The air inlet groove (16) is disposed between front regions in the rotation direction of all of the blades (13) on the ring member (14) and front regions in the rotation direction of the blades (13) adjacent thereto.

Abstract: The invention relates to a pump device having a pump (8) and an energy supply device (5, 18), wherein the pump has a conveying element (9, 11) which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least one first element (9, 9a, 10, 10?, 11) of the pump has a different shape and/or size in the transport state than in the operating state. The operating safety of such a pump device is increased by a detection device (12, 20, 21, 22, 23, 24, 25, 27, 28, 29) which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor.

Abstract: The invention relates to a device for circulatory support of the heart and to a corresponding method with a holding means which is configured such that it can be implanted intracardially in the left and/or right ventricular outflow tract of the heart by means of a catheter, preferably using an endovascular method, through a femoral access and/or a percutaneous transventricular, transseptal, transapical or transvenous access, wherein the holding means comprises an anchoring means which can be fixed in the subcommissural triangle underneath the aortic valve and the pulmonary valve, respectively in the flow direction of the blood on the ventricular side of the aortic valve and the pulmonary valve, respectively, a pump which is configured such that it can be fixed in the holding means by means of a catheter, preferably using an endovascular method, through a femoral access and/or a percutaneous transventricular, transseptal, transapical or transvenous access, wherein the pump (a) can either be inserted releasably

Abstract: The invention relates to a pump device having a pump (8) and an energy supply device (5, 18), wherein the pump has a conveying element (9, 11) which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least one first element (9, 9a, 10, 10?, 11) of the pump has a different shape and/or size in the transport state than in the operating state. The operating safety of such a pump device is increased by a detection device (12, 20, 21, 22, 23, 24, 25, 27, 28, 29) which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor.

Abstract: An axial fan has a hub whose axis coincides with the rotational axis of the fan, a plurality of vanes that extend from the hub, and an outer ring which is coaxial with the hub. The ring has a front portion and a rear portion. The outer ring defines within itself a passage towards the rear portion. The radially outermost ends of the vanes are connected to the inner surface of the passage. The rear portion of the ring has a plurality of appendages that extend axially away from the front portion of the ring, and which alternate circumferentially with corresponding intermediate recesses. Each vane has its radially outermost end connected to an inner surface of one of the appendages.

Abstract: An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Abstract: Hydromotive machines, e.g. hydroturbines and pumps with integral low head loss shut off valves are described. Arrays of such hydroturbines facilitate power generation within the limited space available at pre-existing gated water control structures. An adjustable pitch hydroturbine runner particularly suited for use with the integral loss shut-off valve provides higher power output and higher specific speed than prior art hydroturbines at low head hydroelectric projects. Arrays of pumps in accordance with the present invention provide high discharge capacity in a limited space, with each individual pump within the array having an integral low head loss valve for shut off and backflow prevention.

Abstract: A turbine casing segment is disclosed. In one embodiment, a turbine casing segment is disclosed including: a plurality of stage segments; a plurality of ledge ring partitions separating the plurality of stage segments, wherein at least one of the plurality of ledge ring partitions has an axially extending aperture therethrough; and a substantially rounded extraction aperture located flush with an inner surface of one of the plurality of stage segments.

Abstract: The present invention relates generally to propulsion systems, and, more particularly, to a propulsion system including an axial flow water pump assembly and a laminar flow box assembly for generating a streamline laminar slipstream of water velocity that is used in aquatic therapy, aquatic sport fitness rehabilitation, aquatic rehabilitation, swimming, and a variety of other functional therapy and training modalities.

Abstract: An inducer for vertical flow, cryogenic liquid centrifugal pumps comprising a stationary outer housing portion having an inlet and an outlet, the inlet located at a lower end and the outlet located at an upper end, the housing further having an inner wall portion with one or more spiral grooves formed in the inner wall portion, the grooves defining a hollow opening in the inner wall portion that spiral in a first direction, and an inner rotating impeller mounted on a rotating center shaft, the impeller having at least one curved blade which defines a curved, helicoid plane surface in which the slope of the plane increases as the distance from the center axis increases, the impeller rotating in a second direction which is in counter rotation to the first direction.

Abstract: Tip shrouds on last stage buckets for condensing steam turbines may create significant blockage and form a vortex at the wall of the steam guide of the diffuser, causing the steam flow to separate from the wall of the steam guide. Vortex formation reduces the effective flow area for the remaining fluid to diffuse, causing poor recovery. An inward radial depression is provided of a predetermined depth and distance along an outer steam guide, which redirects the tip leakage flows slightly downward, reducing a shroud blockage effect. This deflection assists the main flow in rejoining the steam guide, thereby making the diffuser more effective.

Abstract: A hydroelectric power device equipped with a casing member that has a channel that passes through from an opening on the water entry side towards an opening on the water discharge side, a rotor having a plurality of blades that are integrally fixed respective to the rotating shaft and are disposed inside the channel of the casing member, and a tapered portion, that is provided on the opening on the water entry side of the casing, and that is formed such that the cross-sectional area of the tapered portion is gradually decreased towards the downstream side.

Abstract: A nacelle assembly includes an inlet lip section and an airfoil adjacent to the inlet lip section. The airfoil is selectively moveable between a first position and a second position to adjust the flow of oncoming airflow and to influence an effective boundary layer thickness of the nacelle assembly.

Abstract: A steam turbine includes a rotor having a plurality of early stages and a stator portion surrounding a portion of the rotor and arranged such that a leakage region exists between the stator portion and the rotor and having a cooling steam channel that passes cooling steam from one portion of the stator portion to the leakage region. The turbine also includes at least one cooling steam transmission channel axially displaced about the rotor that receives the cooling steam from the leakage region and provides it to at least a portion of the early stages.

Abstract: The Vortex Hydro Turbine takes water through an inlet from the current in which it is submerged. The water inlet reduces the cross-sectional area for the water that flows into the vortex chamber and thus increases the velocity of the water into a specially designed cylindrical chamber. The top of the chamber is specifically left open allowing the water now traveling at an increased velocity to disperse toward outlet as it rotates around the chamber, and then reintegrate into the existing environmental regime. This expansion creates a low pressure area in the center of the vortex chamber that is applied to the back side of a turbine blade system either directly or through a connecting tube depending on configuration.

Abstract: A power generation system with a plurality of mechanical devices is described. Each mechanical device has energy-capturing blades and a hydraulic pump. A power generation arrangement remote of the mechanical devices is also disclosed. Each mechanical device can include a device output conduit configured to output a pressurized output flow and a device input conduit for receiving a low pressure flow. The power generation arrangement can comprise a plurality of hydraulic generators, such that each mechanical device can be connected to the plurality of hydraulic generators. A method for power generating is further disclosed, where a pressurized output flow can be delivered in parallel from the mechanical devices to the plurality of hydraulic generators. Some of the hydraulic generators can be switched off when the power transmitted from the blades is low.

Abstract: Axial flow action turbine utilizing the energy of water entering axially and tangentially into a turbine runner with cylindrical hub equipped with radial oriented buckets having cross-section consisting of segments of cylindrical tube where the segments are angularly offset along the bucket's radial axis and where the water exits the turbine runner axially.

Abstract: An air moving device includes a housing member, a rotary fan assembly, and a nozzle, the housing including a plurality of air vents. The air moving device further includes at least one anti-drip structure in the form of a peripheral lip member for inhibiting water from entering the air moving device. The air moving device further includes a baffle member that acts to redirect a volume of air that enters through the plurality of air vents.

Abstract: A propeller nozzle for watercraft includes a stationary propeller and a nozzle ring that shrouds the propeller and can be pivoted by means of a nozzle shaft. The nozzle shaft is provided in the form of a hollow body in order to achieve a constructively simple and simultaneously stable connection between the nozzle shaft and the nozzle ring.

Abstract: An offshore platform includes a support structure for supporting a workstation in a body of water at an offshore location. The support structure has a mounting formation and at least one duct is mounted to the mounting formation. The duct is configured to receive an oscillating water column from the body of water wherein oscillations of the oscillating water column generate a fluid flow for driving an energy extraction module.

Abstract: A shaft power plant (1) for generating electricity by energy conversion of a discharge between a headwater (2) and a tailwater (6), comprising a vertical shaft (7), the top (10) of which forms an inflow plane (11) which is parallel to the bed and extends below the water level (3) of the headwater, wherein the shaft (7) is open toward the top and is closed by a base (9) at its bottom end, a unit (15) composed of a turbine (16) and an electrical machine (17), wherein the unit (15) is arranged entirely under water in the shaft (7) and wherein the turbine (16) is arranged for water to pass through vertically, and an outflow (24), which is connected to the turbine (16), represents a closed flow channel and leads through a through-passage (28) in the shaft (7) to the tailwater (6), wherein, in a horizontal plane of a turbine runner (19) of the turbine (16), a first cross-sectional area of the shaft (7) is much larger than a second cross-sectional area taken up by the turbine runner (19).

Abstract: A mixed flow fan assembly includes an electric motor, an impeller having a hub enclosing the motor, and a plurality of fan blades spaced circumferentially around the hub. The fan assembly also includes an axis of rotation extending through the hub, an annular venturi radially surrounding the impeller, and a mounting plate with an opening to allow for axial airflow positioned on one open end of the venturi. The venturi has at least one elongated slot to allow for radial airflow from the fan assembly, the slot being oriented substantially perpendicular to the axis of rotation and having a generally rectangular shape. Rotation of the hub and the fan blades caused by the electric motor generates both axial and radial airflow through the fan assembly.

Abstract: A submersible propulsor unit, comprising: a duct defined between a duct hub and a duct wall, the duct having a water inlet and a water outlet, a propeller means rotatably mounted within the duct, and an array of stator vanes extending between the duct hub and the duct wall, wherein the array of stator vanes comprises stator vanes having a first stiffness and stator vanes having a second stiffness.

Abstract: The special circumstances of working with hydroelectric turbines in pipes require innovations in blade shapes and systems that are presented here. An example is streamlining of the blades greater than that found in traditional hydroelectric turbines.

Abstract: A heat dissipation fan includes a fan frame, a bearing assembly, a stator and a rotor. The fan frame includes a base and a central tube. The central tube includes an open top end and an open bottom end. The base defines a receiving concave at a bottom surface thereof. The receiving concave communicates with the central hole. A top wall is formed by the base over the concave. A sidewall is formed between the top wall and the bottom surface of the base and surrounds the concave. A plurality of first locking units extend from the top wall into the receiving concave. The bearing assembly includes an oil sealing cover for sealing the open bottom end of the central tube. The oil sealing cover includes a plurality of second locking units which are detachably interlocked with the first locking units to mount the oil sealing cover to the base.

Abstract: There is provided a hydropower plant having a flow passage in the form of an S-pipe and having first, second and third portions. The flow passage has a first diameter and a first center line in the first portion and a second diameter and a second center line in the third portion. A spacing is provided between the first and second center lines. The hydropower plant further has turbine blades in the first portion and a generator coupled to the turbine blades by a shaft in the third portion. The flow passage substantially comprises steel in the region of the generator.

Abstract: There is provided an axial fan apparatus including an axial-flow impeller, a drive unit, and a housing. The axial-flow impeller is capable of rotating and includes a plurality of blades inclined with respect to a rotational axis direction. The drive unit rotates the axial-flow impeller. The housing is mounted with the drive unit, and includes a sidewall, and a plurality of slits that circulate gas. The sidewall is provided around the axial-flow impeller. The plurality of slits are provided to the sidewall and inclined with respect to the rotational axis direction in a direction opposed to a direction in which the plurality of blades incline.

Abstract: A turbine for a hydroelectric power plant intended to equip a water stream at the level of a very low head lower than 10 meters, and preferably from 1 to 5 meters, comprising a helix-shaped wheel, the ratio between the kinetic energy of the water flow coming out of the wheel and the potential energy of the head being smaller than 20%.

Abstract: A pump for transferring molten metal includes an intake tube, a motor, a rotor positioned at least partially within the bottom end of the intake tube, a rotor shaft positioned at least partially in the intake tube, the rotor shaft having a first end attached to the motor and a second end attached to the rotor. An overflow conduit is attached to the intake tube. The pump does not include a pump housing and preferably does not include a superstructure, so it is relatively small, light and portable. In use, the motor drives the rotor shaft and rotor to generate a flow of molten metal upward into the intake tube and into the overflow conduit where it is discharged.

Abstract: A shrouded wind turbine comprises a shroud disposed about an impeller. The impeller surrounds a nacelle body which is shaped to enhance smooth flow of wind through the impeller. Some embodiments include an inlet and an outlet in the nacelle body, allowing airflow through an interior cavity. Other nacelle bodies may be tapered, flared, include mixing lobes around a trailing edge, or may have other shapes that enhance fluid flow. Some nacelle bodies include an annular groove that promotes flow attachment. Maintaining airflow attachment to the nacelle body within the turbine increases the energy generation capacity of the wind turbine.

Abstract: A hydrokinetic turbine system, including a plurality of hydrokinetic turbines is installed on a bed of a body of water. Each turbine has a shroud with a forward entrance portion and rear exit portion. The shroud includes a propeller disposed in a middle portion thereof. An inner surface of the shroud includes a plurality of rifling vanes formed therein to induce water entering the forward entrance portion to rotate in a vortex-like fashion. A plurality of pre-spin guard blades disposed adjacent the forward entrance portion also induce rotation of water and serve to provide a barrier preventing objects from passing into the forward entrance portion. A plurality of stabilizers extending from an exterior surface of the shroud that position the forward entrance portion in the direction of current flow.

Abstract: A turbine stage includes a circumferentially distributed row of adjacent airfoils between which there is a flow passage. The passage has a surface, which in its unmodified form, defines a datum plane. A channel, located in the passage, extends in the direction of an airfoil pressure face from a point towards a leading edge line to a point towards a trailing edge line. The channel includes two channel walls angled relative to the datum plane. Relative to the datum plane, the channel has a low point, two high points, and a channel height, which is measured between the low point and the highest one of the high points. The channel provides a means to reduce secondary flow losses.

Abstract: An axial tip turbine driven pump in which a first fluid pumped by an inducer is driven by a second fluid that reacts with a turbine blade extending from a shroud on the inducer. The inducer includes a set of screw thread blades and a second set of partial blades that are covered by a shroud in the aft section of the inducer. A row of turbine blades extends from the shroud and into a manifold that forms the outer casing for the pump. The fluid flow through the manifold reacts with the turbine blades and drives the inducer to pump the fluid from the inlet and through guide vanes downstream from the inducer. The fluid passing through the turbine blades is collected in an outlet collector manifold and discharged into the fluid flowing through the guide vanes. The inducer with the turbine blades is rotatably supported within the housing formed by the guide vane support member and the manifold casing. The swirl flow direction of the turbine blades is opposite to that of the swirl flow in the inducer.

Abstract: A suction stage for a pump with a centrifugal wheel, the suction stage including a rotational impeller equipped with a hub and arranged upstream of the centrifugal wheel, the suction stage further including a diffuser arranged between the impeller and the centrifugal wheel, the diffuser including a plurality of blades. The hub has a downstream surface extending axially so as to converge toward the centrifugal wheel, and the blades of the diffuser have free ends, the blades protruding radially toward the downstream surface.

Abstract: A fan includes a fan housing and an impeller. The fan housing includes a frame, a base disposed in the frame, a plurality of stationary blades disposed between the frame and the base, and a plurality of airflow-guiding elements extending inward from the frame and toward the base. The airflow-guiding elements and the stationary blades are alternately arranged. The impeller is disposed in the fan housing.

Abstract: A heat-dissipating fan with an upward air-guiding member is provided. The heat-dissipating fan includes a housing, an impeller having a hub and a plurality of blades disposed around the hub, a base disposed inside the housing for supporting the impeller thereon, and an air-guiding member disposed between the base and the housing, wherein the air-guiding member has at least one inclined edge on the windward side or its opposite side relative to the horizontal line perpendicular to the axis of the heat-dissipating fan.

Abstract: Turbine system including a turbine and a tubular arrangement having an exit opening. The tubular arrangement is arranged on a downstream side of the turbine. At least one flow controlling device at least partially prevents a fluid flow through the tubular arrangement from becoming detached from the tubular arrangement. The at least one flow controlling device is positioned within the fluid flow and in an area of the exit opening. The turbine system is configured to operate efficiently in an environment wherein at least an upper edge of the exit opening is arranged above a downstream liquid level.

Abstract: A fluid flow machine includes an annulus duct (2) formed between a casing (1) and a rotor drum (3), which is rotatable about a machine axis (4). At least one row of rotor blades (6) is arranged in the annulus duct (2), with the latter forming a main flow path and with at least one fluid injector nozzle (8) being arranged in the area of a wall of the casing (1) and/or of the rotor drum (3). At least part of the injector nozzle (8) protrudes into the main flow path (9) and is provided for the generation of a jet which is tangentially directed to the wall of the main flow path.

Abstract: Novel twisted blades with an air foil for use with air conditioner condensers and heat pumps that provide improved airflow efficiency to minimize operating power requirements having an overall diameter across the blades being approximately 19 inches, and approximately 27.6 inches. The blades (AC-A) can run at approximately 840 rpm to produce approximately 2200 cfm of air flow using approximately 110 Watts of power from an 8-pole motor. Using an OEM 6-pole ? hp motor produced approximately 2800 cfm with approximately 144 Watts of power while running the blades at approximately 1100 rpm. Power savings were 25% (50 W) over the conventional configuration. A second version of the fan (AC-B) with some refinements to the flow geometry produced a similar air flow while using only 131 W of power at 1100 rpm. Power savings were 32% (62 W) over the conventional configuration. Embodiments can include two, three, four and five blades equally spaced apart from one another about hubs.