Abstract: An impeller for a centrifugal fan rotatable about a central axis extending in an axial direction includes a hub portion expanding radially outward about the central axis, and wings on a radially outer side of the hub portion. A cross-sectional shape of the wing in a circumferential direction is a wing shape.

Abstract: A submersible pump comprises a rotational assembly and a rotational assembly housing. The rotational assembly has a plurality of in-line flow inducing sections. A centerline longitudinal axis of each of the flow inducing sections extends colinearly with a rotational axis of the rotational assembly. A downstream end portion of a flow pressurizing section is engaged with an upstream end portion of a rotational flow amplification section. A downstream end portion of the rotational flow amplification section is engaged with an upstream end portion of a flow outlet section. The rotational assembly housing has an interior space extending along a centerline axis of the rotational assembly housing. The rotational assembly is disposed within the interior space of the rotational assembly housing. The rotational assembly and the rotational assembly are jointly configured for causing the rotational axis to extend colinearly with the centerline longitudinal axis of the rotational assembly housing.

Abstract: A rotor includes a blade, a hub connected to a radially inner edge of the blade, an outlet, and a channel. The blade includes a first side between a leading edge and a trailing edge and a first channel inlet in the first side of the blade. The outlet is in a radially inner surface of the hub. The channel is between the first channel inlet and the outlet.

Abstract: A pump arrangement including a magnetic clutch pump arrangement, the pump arrangement including an inner chamber formed by a housing arrangement, a separating can which hermetically seals a chamber enclosed by it with respect to the inner chamber, an impeller shaft that can be driven in rotation about an axis of rotation, an impeller arranged on one end of the impeller shaft, an inner rotor arranged on the other end of the impeller shaft, a drive device, a drive shaft that can be driven in rotation about the axis of rotation by the drive device, and an outer rotor arranged on the drive shaft and cooperating with the inner rotor. The outer rotor includes a first carrier element and a second carrier element connected to the first carrier element. The first carrier element includes a thermal barrier device.

Abstract: A submersible pump comprises a rotational assembly and a rotational assembly housing. The rotational assembly has a plurality of in-line flow inducing sections. A centerline longitudinal axis of each of the flow inducing sections extends colinearly with a rotational axis of the rotational assembly. A downstream end portion of a flow pressurizing section is engaged with an upstream end portion of a rotational flow amplification section. A downstream end portion of the rotational flow amplification section is engaged with an upstream end portion of a flow outlet section. The rotational assembly housing has an interior space extending along a centerline axis of the rotational assembly housing. The rotational assembly is disposed within the interior space of the rotational assembly housing. The rotational assembly and the rotational assembly are jointly configured for causing the rotational axis to extend colinearly with the centerline longitudinal axis of the rotational assembly housing.

Abstract: A pump of a dishwasher has an integrated heating element, a pump chamber with an inlet and an outlet, a pump rotor inside the pump chamber and a drive motor, wherein the heating element and a temperature sensor are provided on a wall of the pump chamber. For measuring a calcification of the pump chamber it is filled with water and then the pump rotor rotates for mixing the water in the pump chamber without transporting water out of the pump chamber. The temperature of the water in the pump chamber is measured with the temperature sensor as a starting temperature, and then the heating element is activated to heat the water in the pump chamber while the temperature of the water in the pump chamber is measured. Then the heating element is deactivated and the maximum temperature of the water during the heating duration or directly afterwards is determined. A temperature relation between the maximum temperature and the starting temperature of the water is calculated.

Abstract: A ceiling mounted fan or ceiling fan includes a body defining an interior passage having an inlet and an outlet provided on the body. The inlet, outlet, and interior passage can be annular. An impeller mounted is mounted within the interior passage and driven by a motor mounted within the body to draw a volume of air through the interior passage from the inlet to the outlet. The impeller blades include a set of extensions extending from the tip.

Abstract: A tandem rotor disk apparatus may include a rotor disk body concentric about an axis. The tandem rotor disk apparatus may also include a first blade extending radially outward of the rotor disk body and a second blade extending radially outward of the rotor disk body. The first blade may be offset from the second blade in a direction parallel to the axis. The tandem rotor disk apparatus may be implemented in a gas turbine engine with no intervening stator vane stages disposed between the first blade and the second blade. The tandem rotor disk apparatus may include two separate rotor disk bodies.

Abstract: A diagonal fan having an electric motor and a diagonal impeller which can be driven about an axis of rotation (RA) by means of the electric motor. The diagonal impeller determines an air inlet and an air outlet and has a hub and impeller vanes which are distributed in the circumferential direction, extend radially outwards from the hub and are surrounded radially externally by a slinger ring. A flow angle ?D formed by the slinger ring relative to the axis of rotation (RA) increases from the air inlet to the air outlet, and a flow angle ?N formed by the hub relative to the axis of rotation (RA) decreases from the air inlet to the air outlet.

Abstract: A counter-rotating fan, comprising an impeller assembly and an air guide structure. The impeller assembly comprises a first stage impeller and a second stage impeller, of which the rotation directions are opposite. The pressure surfaces of first blades of the first stage impeller are configured to be opposite the suction surfaces of second blades of the second stage impeller, and from the blade root to the blade tip, each of the first blades and the second blades bends toward its own rotation direction. The air guide structure comprises a flow guide cover. The flow guide cover is provided at the center position of the air intake side of the first stage impeller, and the air intake side surface of the flow guide cover at least partially forms a flow guide surface, the flow guide surface extending along the axis of the first stage impeller in the direction away from the counter-rotating fan.

Abstract: A series-connected fan includes a first fan and a second fan. The first fan includes a first frame, a first base, first static blades and a first impeller. The second fan includes a second frame, a second base, second static blades and a second impeller. A first underframe of the first frame is connected to a second underframe of the second frame. The first static blades are disposed around the first base and connected to the first base and the first underframe. The second static blades are disposed around the second base and connected to the second base and the second underframe. The first impeller includes a first hub and first rotor blades. The second impeller includes a second hub and second rotor blades. The cross-sectional area of the first hub increases along a direction from the top of the first hub to the bottom of the first hub.

Abstract: Disclosed is an impeller for mixing a fluid wherein the impeller is fashioned so as to substantially reduce areas of fluid acceleration and deceleration around a hub region of the impeller during fluid mixing. Additionally, a bioreactor system having microcarriers, kit of parts and cell culturing method are also provided. The impeller has a generally circularly shaped hub having a downwardly directed progressively tapered volume which has plurality of periods formed therein corresponding to the number of increasingly arced blades. Each of the increasingly arced blades flare outwards to a distal end region of the impeller and have an increasing radius to said arc towards a peripheral edge region of said hub. The flare to the increasingly arced blades defines a larger circumference than that of said hub, thereby imparting a generally frusto-conical shape to the impeller. A method mixing a fluid using the impeller disclosed herein is also disclosed.

Abstract: An inducer includes a hub and a blade which radially protrudes from the hub and is helically provided. The inducer has a thick portion in which a first distance and a second distance coincides with each other in a region outside a position at which a height ratio of the blade is 0.5 while the first distance is shorter than the second distance in a region inside the position at which the height ratio of the blade is 0.5, in which the height ratio is a ratio of a distance from a connection portion between the hub and a root portion of the blade with respect to a height of the blade which is a distance from the connection portion between the hub and the root portion of the blade to a tip portion of the blade in the radial direction of the blade.

Abstract: A nosecone assembly having an axially extending centerline is provided. The assembly includes a nosecone body and at least one access panel. The nosecone body has at least one wall that defines an interior cavity. The wall has an interior surface contiguous with the interior cavity, and at least one window aperture extending through the wall. The access panel has first and second face surfaces. The access panel is attached to the wall interior surface within an attachment region that includes first and second attachment region portions partially contiguous with one another. The first and second attachment region portions define an interior unattached region, and the interior unattached region is aligned with the window aperture.

Abstract: Provided are: a lubricating device for a bearing; and an exhaust turbosupercharger, wherein a bearing device (36) is provided with a housing (15) with a hollow shape, and journal bearings (21, 22) which rotatably support a rotary shaft (14) arranged inside the housing (15), the bearing device (36) being further provided with: a third feeding passage (43) and a fourth feeding passage (44) through which lubricant is fed toward outer circumferential surfaces (21b, 22b) of the journal bearings (21, 22); a sixth feeding passage (46) through which lubricant is fed toward a space section (16A) between the journal bearings (21, 22); and a guide section which guides, toward inner circumferential surfaces (21c, 22c) of the journal bearings (21, 22), the lubricant fed from the sixth feeding passage (46) to the space section (16A).

Abstract: The present disclosure is directed to a system for bleeding air from a compressed gas path of a gas turbine engine. The system includes an impeller positioned at a downstream end of a compressor in the gas turbine engine. The impeller includes an impeller hub, an impeller arm coupled to the impeller hub, and a plurality of circumferentially spaced apart impeller vanes extending radially outwardly from the impeller arm. The impeller arm defines an impeller arm aperture extending therethrough. A vortex spoiler is positioned radially inwardly from the impeller arm and defines a vortex spoiler passage extending radially therethrough. Bleed air flows from the compressed gas path radially inwardly through both the impeller arm aperture and the vortex spoiler passage.

Abstract: Systems and methods of coupling a nose cone to a turbine machine. Nose cone assembly weight and coupling difficulty are each reduced by reducing or eliminating the number of bolts used to mount the nose cone to the turbine machine, as well as the support or retaining ring. The disclosed nose cone comprises a plurality of hub mounting elements disposed around the circumference of a base portion, each of the hub mounting elements comprising a flexible flange extending toward the central axis and having a ridge protruding from a radially outward facing surface. The flexible flange is configured to deflect toward the central axis upon engagement with the hub.

Abstract: A fan comprises a hub and at least one blade coupled to the hub. The blade comprises an inlet portion and an outlet portion. The inlet portion is defined by a longitudinal axis, an inlet edge, and a portion of a distal edge. The outlet portion is defined by the longitudinal axis, an outlet edge, and another portion of the distal edge.

Abstract: An impeller of an axial fan includes a cup-shaped blade support portion configured to cover a rotor holder, and blades in a circumferential direction outside of the blade support portion. Rotation of the impeller generates a downward air flow from the inlet of the axial fan to the outlet of the axial fan. The axial fan includes first and second balance correction portions. The first balance correction portion is located between the blade support portion and the rotor holder. The second balance correction portion is located axially below the first balance correction portion, and is located axially below the rotor holder and a junction of each blade with the blade support portion. The impeller includes a first cone portion located axially below the second balance correction portion. A tangent to a radially outer surface of the first cone portion crosses the second balance correction portion.

Abstract: An impeller of an axial fan includes a cup-shaped blade support portion configured to cover a rotor holder, and blades arranged in a circumferential direction radially outside of the blade support portion. Rotation of the impeller generates a downward air flow. The axial fan includes first and second balance correction portions. The first balance correction portion is located between the blade support portion and the rotor holder. The second balance correction portion is located axially below the first balance correction portion, and is located axially below the rotor holder and a junction of each blade with the blade support portion. The impeller includes a first cone portion located axially below the second balance correction portion, and decreases in diameter with decreasing height.

Abstract: An axial flow fan is provided. The axial flow fan includes an impeller and a fan frame. The impeller has a maximum outer diameter. The fan frame includes a first body and a second body. The first body includes a plurality of connecting elements and a base. The connecting elements are connected to the base. The second body is a hollow body, and used for disposing around the impeller. The second body includes a flow passage having a minimum inner diameter. The minimum inner diameter of the flow passage is not larger than the maximum outer diameter of the impeller. Therefore, the size of the second body does not restrict the maximum outer diameter of the impeller, and the shape of the impeller and the shape of the fan frame can be designed flexibly according to the practical demand.

Abstract: An impeller including a hub body, a shroud surrounding the hub body, and a plurality of impeller blades extending from the hub body to the shroud, wherein the hub body, the shroud, and the plurality of impeller blades are a one-piece structure.

Abstract: A thin fan and a manufacturing method thereof are provided. The thin fan has a fan frame, a sleeve, a bearing, an impeller, a magnetic element and at least one coil. The fan frame includes a base and a cover connected to the base. The fan frame has an inlet and an outlet. The sleeve is disposed on the base, and the bearing is disposed within the sleeve. The impeller and the magnetic element are disposed on the fan frame and a metal housing, respectively. The coil is disposed opposite the magnetic element. The base has at least one plastic portion and at least one metal portion. The metal portion has at least one non-magnetic metal, and the plastic portion is integrated with the non-magnetic metal by injection molding.

Abstract: A fluid movement system that includes an impeller having a blade with a leading edge blade tip angle determined as a function of an increase in mass flow rate due to reinjection of flow from a flow stability device located proximate to the leading edge tip of the blade. In an exemplary method, the leading edge blade tip angle can be determined based on selecting a blade incidence level based on a mass flow gain versus flow coefficient curve. Blade leading edge tip angles determined in accordance with a method of the present invention are typically greater than blade leading edge tip angles determined using traditional methods. The greater blade leading edge tip angles can lead to more robust blades designs.

Abstract: The present disclosure relates to a propfan engine comprising: one or more rotor stages comprising a plurality of rotors; and an outer wall comprising an outer profile, at least a portion of the outer profile defining a substantially circular cross-section, wherein the diameter of the substantially circular cross-section increases in the direction of flow over the outer wall and downstream of a leading edge of the rotors, and the diameter increases at substantially all points defining the circumference of the substantially circular cross-section.

Abstract: A portable fluid blower with a housing having a central axis and defining a fluid flow path extending axially between an upstream inlet and a downstream outlet. A fan assembly has a rotary component that is operable to draw fluid into a first stage of the flow path and accelerate fluid incoming at the inlet radially outwardly to against a first housing surface portion that diverts the fluid to a second stage of the flow path. The second flow path stage is defined by facing second and third housing surface portions that cause the fluid to flow substantially fully axially in an annular space extending around the central axis between the first stage and a third stage. The fluid flows from the third stage to and through the downstream outlet.

Abstract: An inventive wind turbine configuration including a means for increasing wind speed through the body of the turbine and means for directing the fluid air into a discrete portion of the turbine generator is provided. Such a device allows for the capture of wind from any environment, low speed or otherwise, in order to subsequently efficiently increase the overall wind speed thereof for further introduction within the turbine portion. The overall device thus includes a properly configured air intake component portion with a conical component to direct the captured wind directly to a portion of the turbine as well as suitable means to reduce back pressures of the introduced fluid stream.

Abstract: An axial-flow fan structure is disclosed, having a localized area expansion between the rotor (i.e. front rotating impeller) and stator blades (i.e. rear stationary or fixed blades, sometimes called de-swirl vanes). The area expansion is provided by utilizing an impeller having a (slightly) falling tip contour (FTC).

Abstract: An inlet for a ram air turbine. The inlet is positioned forward of a turbine shaft, which is configured to rotate about a portion of an object. The inlet has a fixed geometry that chokes airflow through the inlet to prevent overspeed of the turbine shaft.

Abstract: An improved exhaust fan housing, and exhaust fan assembly so characterized, is generally provided. The exhaust fan housing includes a first cylindrical or conical element, a second cylindrical element interior of the first cylindrical element, and a plurality of hollow vanes traversing an annular fluid passage chamber delimited thereby and uniting the first and second cylindrical elements. A central drive chamber, delimited by the second cylindrical element, is in fluid communication with ambient air exterior of the first cylindrical element via the hollow vanes. Each hollow vane is characterized by spaced apart wall segments which unitingly terminate so as to delimit a leading edge for each hollow vane, each of the spaced apart wall segments having a free end or a closed end delimiting first and second trailing edges for the hollow vanes.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A vane profile section for an Air Turbine Starter includes an airfoil which defines an airfoil profile section through a leading edge and a trailing edge, the airfoil profile section defined by a set of X-coordinates and Y-coordinates.

Abstract: A nose cone assembly for a gas turbine engine comprises a spinner and a plurality of circumferentially spaced mounting members for mounting the spinner on a fan hub of the gas turbine engine. Each of the mounting members is rigid in a generally axial direction and flexible in a generally radial direction.

Abstract: A system for installing and extracting a flowing water turbine below the surface of the water includes a flow inducer assembly for improving the conversation of the kinetic energy of a waterway to mechanical energy. The flow inducer assembly includes a nozzle that may be shaped as a cowling and a outlet diffuser. The system may be useful in a number of settings, including, but not limited to, streams, rivers, dams, ocean currents, or tidal areas that have continuous or semi-continuous water flow rates and windy environments.

Abstract: A hub cone (20, 30, 40) is provided for an aircraft engine having a propeller (2, 32, 42) or a blower (fan) (3) enveloped by a casing (5). To reduce flow losses of the hub cone and increase efficiency of the engine, a contour of the hub cone is described by the following equation: S(x)=Rmax*{1?[(x?Lmax)/Lmax]2}1/M; where: S(x) is a shape of the cone defined along the machine axis x; Rmax is a maximum extension (26) of the cone in the radial direction; Lmax is a maximum extension (25) of the cone in the direction of the machine axis x and M is a quantity describing the shape S(x).

Abstract: A mixed flow fan wheel has a convex hub, an axially-spaced away concave annular shroud, and a plurality of angularly distributed blades extending between and interconnecting the hub and shroud, all which cooperatively define a plurality of inter-blade flow channels. Each has a pressure surface and spaced suction surface extending not only between spaced inlet and discharge edges but also, crosswise thereto, spaced hub-side and shroud-side edges. Each discharge edge is convex relative a center of geometry of the blade therefor. Each inter-blade flow channel originates in a generally rectangular shape between flanking inlet edges and terminates in another generally rectangular shape between flanking discharge edges, with a procession of gradations of generally rectangular shapes forming a progressive transition therebetween. Moreover, each inter-blade flow channel twists or corkscrews from inlet thereof to the discharge.

Abstract: An axial fan is provided. The axial fan includes a base, a rotor, a guide and a plurality of blades. The guide connects to a guide tube to provide airflow. Each blade has a passive part and an active part, wherein the passive part is driven by the airflow from the guide to rotate the active part synchronously. The axial fan increases air quantity and decreases air pressure to provide efficient heat dissipation.

Abstract: A blower unit for a portable blower, having a drive shaft that is rotatably driven by a drive motor. Disposed in the blower unit is an axial fan that is provided with at least one fan wheel driven by the drive shaft and at least guide wheel fixedly disposed in the housing. To achieve a simple construction and a simple manufacture, the housing has at least two housing sections and is divided approximately parallel to the axis of rotation of the drive shaft.

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: The guide vanes comprise two kinds of guide vanes which are alternately placed in the circumferential direction of a shroud. One kind of the guide vanes have a longer length than the other kind of the guide vanes, in the region which is close to the surface of the hub, but have substantially the same length as the other kind of the guide vanes, in the region which is close to the shroud. The leading edges of the second kind of guide vane are located further downstream in the pump axial direction than the leading edges of the first kind of guide vanes.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: The present invention discloses an electric fan module and an airflow conduction structure thereof, wherein the airflow conduction structure is coupled to an electric fan and guides the central airflow to fan blades to reduce wind resistance and wind shear. The airflow conduction structure has an airflow conduction body and at least one airflow conduction groove arranged axially on the airflow conduction body. The airflow conduction body has a first end face and a second end face, and the first end face is greater than the second end face. The airflow conduction grooves are arranged between the first and second end faces.

Abstract: The present invention discloses a sectional fan frame structure composed of two units or two units and a circular plate frame. The units can be made in different shapes as needed, and the units come with fasteners. The circular plate frame is formed by enclosing a plate, and the fasteners are installed at the positions of connecting the circular plate frame and the units. Therefore, a fan frame can be assembled by the latch of fasteners between the units, or the unit and the circular plate frame, so as to achieve the effects of simplifying the development of a mold, providing an easy demold after an injection molding, assembling a fan frame with a different height by changing the width of the circular plate frame, and saving the cost of the mold.

Abstract: A nose cone for a turbomachine, such as a turbojet in particular, the cone being mounted on the end of a shaft carrying fan blades and being associated with a controlled axial displacement mechanism, thereby making it possible to modify the axial position of the cone relative to the fan blades.

Abstract: A turbine disk comprising a disk bore disposed about a centerline, the disk bore comprising a bore width, and a web extending radially away from the disk bore wherein the disk bore comprises in cross-section a contoured shape comprising a contour depth.

Abstract: Disclosed is a submersible pump assembly for handling two-phase flow. The pump assembly preferably includes a housing and a first stage. The first stage includes an impeller assembly and a diffuser assembly, which are collectively configured to produce a diagonal flow path through the first stage.

Abstract: A heat-dissipating device and a housing thereof. The housing includes a passage for guiding an air stream flowing from an opening to another opening, wherein an inner wall of the passage at at least one of the opening sides extends radially outwards with a rotational axis of the heat-dissipating device or the passage so as to enlarge intake or discharge area for the air streams. Accordingly, the intake airflow rate may be greatly increased and the heat-dissipating efficiency of the heat-dissipating device may be greatly enhanced without changing assembling conditions with other elements.

Abstract: An inline centrifugal mixed flow fan (20) includes an axially extending intake conduit (22). An inlet cone (28) is disposed at an intake end (24). An impeller (30) is disposed downstream of the inlet cone and includes a centrally disposed wheel-back (32) rotated by an electric motor (44), plural fan blades (34) extending radially outwardly from the wheel-back and a wheel cone fixedly (36) attached to and circumscribing the wheel blades. A driver chamber (48) downstream of the impeller includes plural radially extending straight vanes (50) to direct air to an outlet end (26). The fan is configured to achieve reduced sound level and increased efficiency.

Abstract: A system (1) designed to generate energy with the aid of, primarily, sea currents, comprising a rotation body (4) having a front inlet side (2) and a rear outlet side (3), and at least one transfer member (6) connected between the inlet side (2) and a generator (5). The rotation body has a conical and/or bulb shaped, tapering section (8, 9) extending from a substantially cylindrical waist section (7) in direction towards the inlet side, and a conical and/or concave or flat portion extending in the opposite direction from the outlet side, said waist section being along its circumference provided with close to each other mounted blades (10) for the purpose of maintaining a rotation of the rotation body, the free, front end of which is at the same time secured to the transfer member (6) in order to transfer a rotational movement to the generator (5).

Abstract: The present invention relates to a structural reinforcement of the fan wheel of a mixed flow fan. The structure of the fan wheel comprises a hub and several blades attached to the outer rim of this hub. One side of the hub consists of a hollow space, the other side consists of a flat surface. The blades are attached to the outer rim of the hub in equal distances. The outer rim of the hub is beveled. The flat surface acts as the air inlet side, the hollow side acts as the air outlet side. The surfaces of the blades are to bend. The part connecting the blades to the hub is also to bend. Therefore cambered channels form in the gaps between the blades, which are arranged in equal distances. Through use of this structure the operational area for the characteristic curve of the mixed flow fan is increased and the possibility of a loss of speed is reduced. Thus the overall performance of the fan is improved.