Abstract: A fan wheel includes a hub having a passage extending along an axis, where the passage is configured to receive a shaft. The hub includes a first mounting surface positioned at a first location along the axis and a second mounting surface offset from the first mounting surface and positioned at a second location along the axis. The fan wheel also includes a fan blade having a first mounting tab and a second mounting tab, where first mounting tab is configured to engage with and couple to the first mounting surface and the second mounting tab is configured to engage with and couple to the second mounting surface.

Abstract: An impeller for a centrifugal compressor, the impeller rotatable about a central axis, has: an outer hub body including a first material and extending around the central axis, the outer hub body defining a gaspath face extending from an inlet to an outlet, the gaspath face extending radially away from the central axis from the inlet to the outlet; blades protruding from the gaspath face and circumferentially distributed around the central axis; and an inner hub body extending around the central axis, the inner hub body secured to the outer hub body, the outer hub body axially overlapping and extending around the inner hub body, the inner hub body made of a second material being more cold dwell resistant than the first material.

Abstract: An impeller with impeller blades arranged around a rotational axis of the impeller. Integral, seamless, and notch-free transitions are formed into a disc body on at least one of their two axial sides. The disc body connects the impeller blades in the circumferential direction around the rotational axis. Covering portions, between the impeller blades, determine the flow channels of the impeller.

Abstract: A centrifugal blower includes an outer rotor, and a turbo fan. The turbo fan includes blades, an other end plate, and a cylinder portion. The cylinder portion is located inside the other end plate, and is fixed to the outer rotor. A surface of the outer rotor configures a rotor guide surface that guides an air flow toward a channel provided between adjacent blades. Each blade has a leading edge side portion located radially inside the cylinder portion. An outer end portion of the rotor guide surface in the radial direction is located at the same position in the axial direction as a one side cylinder end portion of the cylinder portion in the axial direction, in a state where a rotor contact portion of the outer rotor and a blade contact portion of the leading edge side portion are in contact with each other.

Abstract: The present disclosure relates to an impeller and a method of manufacturing the same. The impeller includes: a hub in which a plurality of spiral first slots are formed; a shroud which is positioned opposite the hub, and has a plurality of spiral second slots formed therein; and a plurality of blades which is coupled to the hub and the shroud, and have an upper protrusion formed on one side and a lower protrusion formed on the other side; and wherein the upper protrusion is inserted into and coupled to a second hole formed in the second slot, and the lower protrusion is inserted into and coupled to a first hole formed in the first slot.

Abstract: A blower and method of manufacturing a blower for a heating, ventilation, air conditioning, and refrigeration (HVACR) unit is disclosed. The blower includes a plurality of blower sections. Each section includes a first shroud, a second shroud spaced from the first shroud in a direction of a longitudinal axis of the blower, and a blade. The blade is formed such that a first end of the blade is joined with the first shroud and a second end of the blade is joined with the second shroud. A band is secured to the plurality of blower sections.

Abstract: A centrifugal impeller including a wheel cover, a wheel disc, and a plurality of blades disposed between the wheel cover and the wheel disc. The wheel cover and the wheel disc each includes a sheet metal, and the plurality of blades includes a composite material. The wheel cover includes an air inlet. The wheel disc includes a central part and a motor mounting base disposed on the central part. Every two adjacent blades form an air channel including an air outlet. The plurality of blades each includes a metal frame, and a plastic shell disposed on the metal frame. Two ends of the metal frame are connected to the wheel cover and the wheel disc, respectively. The metal frame is integrated with the plastic shell through injection molding. The plastic shell is wrapped around at least a part of the metal frame.

Abstract: A method includes removing a worn portion from a component of a rotary isobaric pressure exchanger (IPX). The rotary IPX is configured to exchange pressures between a first fluid and a second fluid. The method also includes repairing the component after the worn portion is removed from the component.

Abstract: A centrifugal blower includes an outer rotor, and a turbo fan. The turbo fan includes blades, an other end plate, and a cylinder portion. The cylinder portion is located inside the other end plate, and is fixed to the outer rotor. A surface of the outer rotor configures a rotor guide surface that guides an air flow toward a channel provided between adjacent blades. Each blade has a leading edge side portion located radially inside the cylinder portion. An outer end portion of the rotor guide surface in the radial direction is located at the same position in the axial direction as a one side cylinder end portion of the cylinder portion in the axial direction, in a state where a rotor contact portion of the outer rotor and a blade contact portion of the leading edge side portion are in contact with each other.

Abstract: A fan main body member of a turbofan has multiple blades disposed around a fan axial center, a shroud ring coupled to each of the blades, and a fan hub portion coupled to each of the blades on a side opposite from the shroud ring. An other end side plate of the turbofan is joined to each of the other side blade end portions of the blade in a state of being fitted to the radially outer side of the fan hub portion. A fitting gap between the other end side plate and the fan hub portion is formed such that an outflow velocity of air when air passes through the fitting gap and outflows is reduced as compared to when air passes through a virtual reference gap that corresponds to the fitting gap and outflows.

Abstract: An impeller includes a shell having a plurality of blades. The shell may also define a cavity. The impeller may further include a backplate that engages at least a portion of the shell. The backplate can include a post which can be coupled to the impeller through a fastener such as a threaded nut. The backplate can be thereafter clamped to the impeller shell. Seals can be provided in the impeller, such as in the backplate. The backplate and impeller shell can be piloted onto each other. In some forms splines can be used to secure the backplate to the impeller shell.

Abstract: An eddy pump impeller includes a hub having a planar rear surface, the hub tapering from the planar rear surface to a conical front end, and a plurality of blades extending from the hub. Each of the plurality of blades has an outer surface essentially parallel to a rotational axis of the hub, inversely tapers from the hub, and has a front surface tapering in height from the front conical end, such that the plurality of blades is configured to cause an eddy current and cause a fluid stream to be forced to the outside of the impeller.

Abstract: The present invention relates to a suction device (103) for a hood, comprising an impeller (303), an electric motor (302) that drives said impeller (303), a volute (201) that houses inside the electric motor (302) and the impeller (303), a capacitor (306), and a connector (307) electrically connected to the capacitor (306) for supplying power to the electric motor (302); the volute (201) comprises a first semi-shell (201a) and a second semi-shell (201b) joined with each other so as to constitute the structure of the volute (201) surrounding the impeller (303); the capacitor (306) is housed in a first compartment (308) formed in the first semi-shell (201a), and the connector (307) is housed in a second compartment (309) formed in the second semi-shell (201b); the first compartment (308) and the second compartment (309) are adjacent to each other in the volute (201). The present invention further relates to an associated range hood.

Abstract: A turbo-machine for compressing or expanding a fluid comprises a housing, a rotary shaft, an electric machine, an impeller mounted at an end of the rotary shaft, radial magnetic bearings, an axial magnetic bearing, an axial detector, radial detectors, a control circuit, and auxiliary bearings. An auxiliary bearing is integrated within a stator portion of the axial magnetic bearing and this stator portion of the axial magnetic bearing is located opposite a rotor armature of the axial magnetic bearing. The rotor armature is made of iron or of a material which is adapted to be attracted in a magnetic field and is constituted by a rear face of the impeller.

Abstract: A multi-use fan includes a front fan cover, a rear fan cover, blades, a motor, and a handle. The front and rear fan covers fit together to form a fan cover, a protrusion mirrored along the center line of the fan cover and disposed on the bottom thereof, a foldable connecting part disposed on the bottom of the rear fan cover, a foldable mounting part fitted with the foldable connecting part and disposed on the top of the handle. The handle includes a handle housing, a battery, a battery cover, a line group, an adjusting knob, an anti-slip pad rotationally connected with the side of the handle housing and formed at the highest point thereof, and an elastic metal bar including a short edge rotationally connected with the side of the handle housing and a long edge connected with the upper end face of the handle housing. The battery, the line group and the adjusting knob are disposed inside the handle housing, with an opening set in the handle housing at a position corresponding to the adjusting knob.

Abstract: A single suction type centrifugal fan includes a casing, an impeller, and a main plate. The casing includes a side plate and a motor fixing side plate, and the side plate and the motor fixing side plate are arranged in parallel. A rectifying plate is provided between the motor fixing side plate and the main plate, and the rectifying plate is formed from an inclined surface in which an area of a cross section orthogonal to a rotation shaft is reduced toward the impeller around the rotation shaft of a motor. A first rectifying plate diameter at another side of the rectifying plate closer to the impeller is smaller than an impeller diameter of the impeller.

Abstract: A centrifugal fan assembly having an axis of rotation includes an inlet ring, a back plate, and a plurality of blades coupled between the inlet ring and the back plate. At least one blade of the plurality of blades includes a radially inner edge, a radially outer edge, and at least one flow channel extending obliquely therebetween. The at least one flow channel includes an inlet defined on the radially inner edge and an outlet defined on the radially outer edge, wherein the inlet and the outlet are positioned at different axial locations along a length of the blade.

Abstract: An improved fan blade is characterized by a fan blade body and anchors extending therefrom. The fan blade body includes opposingly paired ends and opposingly paired sides, the opposingly paired ends for extension between a backplate and a wheel cone of a fan wheel assembly, with each side of the opposingly paired sides for united extension across a portion of each of the backplate and wheel cone of the fan wheel assembly. Each anchor of the anchors includes an aperture, with each anchor of the anchors substantially extendable through a portion of either of the backplate or wheel cone of the fan wheel assembly such that at least a portion of the aperture of the anchor extends beyond either of the backplate or wheel cone of the fan wheel assembly with the at least a portion of the aperture of the anchor for receipt of an anchor pin.

Abstract: A centrifugal fan is provided that includes a main plate configured to be rotated about a rotational axis, a shroud, having a suction opening, and a plurality of blades arranged in a circumferential direction between the main plate and the shroud to allow air suctioned in through the suction opening to flow from a front edge to a rear edge of each blade. Assuming a first cross section, a second cross section, a third cross section, and a fourth cross section of each blade sequentially taken at layers from the shroud to the main plate, a front edge of the first cross section is located farther from the rotational axis than a front edge of the fourth cross section, and a rear edge of the first cross section is located closer to the rotational axis than a rear edge of the fourth cross section.

Abstract: A centrifugal fan includes a main plate that is fixed to the rotational shaft of a fan motor and driven by the fan motor, a shroud having an air inlet, and a plurality of blades disposed between the main plate and the shroud. Each blade includes a main blade set on its suction surface side and a blade cover set on its pressure surface side. The main blade is joined to the main plate and the shroud. The blade cover is joined to the main blade, and is biased toward the main blade under the air pressure during rotation. Thus, the joint force between the main blade and the blade cover is enhanced, thereby enhancing the strength of joint of engagement portions of the blade and reducing abnormal noise generated due to the presence of one or a plurality of gaps formed between the engagement portions.

Abstract: A manufacturing technique for impellers for a centrifugal rotating machine is provided. The impeller is made by composition of single vanes pieces that fit to the hub or directly to the rotor shaft by welding, friction welding or a mechanical locking system. The manufacturability of the segments is easy fast and cheap and make it possible to use advanced manufacturing technologies like additive manufacturing of the type of Direct Metal Laser Melting.

Abstract: The present disclosure relates to impellers with removable and replaceable vanes, and methods of constructing such impellers. According to aspects of the present disclosure, a plurality of impeller back plates are provided with differently configured slots to receive removable vanes. In addition, a plurality of differently configured vanes are disclosed which may be connected to the plurality of impeller back plates. As a result, the desired performance characteristics of a pump based upon end use applications may be efficiently and quickly achieved by combining appropriately configured vanes and back plate into a desired impeller providing the desired characteristics, together with a particular pump casing and motor.

Abstract: Provided is a turbofan including a shroud, a main plate, and a plurality of blades. A main plate-side shoulder surface portion is curved so as to be distanced from the rotational center axis while approaching the blade trailing edge as the main plate-side shoulder surface portion is distanced from a main plate-side blade tip portion, and has a convexoconcave shape including a blade tip section and the main plate-side blade tip portion. An inner peripheral-side leading edge section includes the inner peripheral-side blade leading edge section main plate-side portion and an inner peripheral-side blade leading edge section tip-side portion including curves that protrude rearward in the rotational direction.

Abstract: An aspect includes a compressor diffuser and shroud for a motor driven compressor assembly. The motor driven compressor assembly includes a first stage compressor and a second stage compressor. The compressor diffuser and shroud of the second stage compressor includes a diffuser portion and a shroud portion. The diffuser portion includes a diffuser portion outer lip having a first sealing lip outer diameter to provide a first sealing interface to a second stage compressor housing. The shroud portion includes a curvature between the diffuser portion outer lip and a compressor inlet to align with a second stage compressor rotor, where a ratio of the first sealing lip outer diameter to an innermost diameter of the compressor diffuser and shroud is between 2.698 and 2.711.

Abstract: A method for manufacturing a machine component includes a process of estimating post-heat-treatment strength for the intermediate form of a base material after a certain mechanical working process is performed, and a process of comparing the estimated strength with reference strength required for a final form. According to a result of the comparison, heat treatment of the base material is performed after one of the mechanical working processes is performed.

Abstract: Embodiments of an apparatus, system, method and techniques are described for an improved volumetric resistance blower and rotor. An apparatus may comprise, for example a motor, a casing having one or more inlets and one or more outlets, and a cylindrical rotor to create a volumetric resistance inside the casing, at least a portion of the rotor comprising a porous material. Other embodiments are described.

Abstract: A cross-flow fan includes a disc-shaped or circular annular support plate, plural blades extending in a lengthwise direction from the support plate, and an auxiliary ring. The auxiliary ring has a ring portion that is positioned on a lengthwise direction intermediate section of the plural blades and is disposed on an outside of outer ends of the plural blades, and plural connection portions that extend from the ring portion as far as spaces between adjacent blades of the plural blades and are joined to the blades in the spaces between adjacent blades.

Abstract: A cross-flow fan includes a plurality of fan blades. The fan blade has an inner edge portion arranged on an inner circumferential side and an outer edge portion arranged on an outer circumferential side. In the fan blade, a blade surface extending between the inner edge portion and the outer edge portion is formed. As the fan rotates, an air flow which flows between the inner edge portion and the outer edge portion is generated over the blade surface. The fan blade has such a blade cross-sectional shape that a recess is formed in the blade surface. The recess is arranged at a position closer to the outer edge portion than to the inner edge portion and formed to extend from one end to the other end of the fan blade in a direction of a rotation axis of the fan.

Abstract: A cross-flow fan includes a plurality of fan blades. The fan blade has an inner edge portion arranged on an inner circumferential side and an outer edge portion arranged on an outer circumferential side. In the fan blade, a blade surface extending between the inner edge portion and the outer edge portion and constituted of a positive pressure surface and a negative pressure surface is formed. The fan blade has such a blade cross-sectional shape that a large-thickness portion at which a thickness between the positive pressure surface and the negative pressure surface is greatest is arranged closer to the inner edge portion. A recess recessed in the blade surface is formed at a position closer to the inner edge portion where the large-thickness portion is arranged, than to the outer edge portion.

Abstract: An improved positive displacement pump provides improved wear characteristics. Specifically, rotor pads are provided on faces relative to an internal portion of the rotor housing as it relates to an end wall and a rear side of a cover plate. The rotor pads preferably have at least one of anti-galling and/or anti-friction or anti-wear characteristics thereby providing improvements over the prior art. A central member is preferably provided so that pad replacement may be relatively easily performed in the field in clean in place operations.

Abstract: A blower assembly for use in a vehicle is disclosed, wherein the blower assembly includes a housing and a fan wheel disposed in the housing. A scroll duct formed in the housing axially and radially expands from a scroll cutoff towards an air outlet. The fan wheel includes a hub, concentrically arranged inner and outer annular rings, and an array of spaced apart blades extending between the hub and the annular rings.

Abstract: An industrial fan impeller that includes blades having an outer edge with a tapered portion and a level portion and method of manufacture are provided. The industrial fan impeller includes a front plate with a first diameter and a back plate with a second diameter larger than the first diameter of the front plate. Blades are attached to the front plate and the back plate. Individual blades have an outer edge with a tapered portion and a level portion. The blades are positioned between the front plate and the back plate such that the tapered portion of the outer edge of the individual blades tapers towards the front plate of the industrial fan impeller.

Abstract: An impeller for a turbo-machine and is provided. The impeller includes a metallic base having a central hole, a back surface and a front surface opposite to the back surface; at least one blade extending on the front surface of the metallic base; a composite shroud attached to the at least one blade such that plural closed paths or vanes are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and a connector configured to attach the composite shroud to the metallic base or the at least one blade.

Abstract: In one aspect, a fan assembly is provided that can be manufactured while producing a significantly reduced amount of scrap material. More specifically, the fan assembly utilizes a hub ring and one or more hub strips to support a plurality of blades rather than a solid center disc or end disc used by some prior approaches. In another aspect, a method is provided that includes bending a member into an annular configuration and joining end portions of the member together to rigidly fix the member in the annular configuration. The rigid annular member may be used as an end ring, a hub ring, an orifice, or other component, while producing significantly less scrap material than traditional approaches.

Abstract: An impeller includes a shell having a plurality of blades. The shell may also define a cavity. The impeller may further include a backplate that engages at least a portion of the shell. The backplate can include a post which can be coupled to the impeller through a fastener such as a threaded nut. The backplate can be thereafter clamped to the impeller shell. Seals can be provided in the impeller, such as in the backplate. The backplate and impeller shell can be piloted onto each other. In some forms splines can be used to secure the backplate to the impeller shell.

Abstract: In one aspect, a fan assembly is provided that can be manufactured while producing a significantly reduced amount of scrap material. More specifically, the fan assembly utilizes a hub ring and one or more hub strips to support a plurality of blades rather than a solid center disc or end disc used by some prior approaches. In another aspect, a method is provided that includes bending a member into an annular configuration and joining end portions of the member together to rigidly fix the member in the annular configuration. The rigid annular member may be used as an end ring, a hub ring, an orifice, or other component, while producing significantly less scrap material than traditional approaches.

Abstract: A method for forming an inclined-blade blower wheel is provided by arranging a plurality of blades about respective circumferences of first and second end caps. The plurality of blades extend longitudinally between the first and second end caps and parallel to an axis defined by respective centers of the first and second end caps. The first end cap is rotated with respect to the second end cap a predetermined amount, therein skewing the plurality of blades at a desired longitudinal pitch between the first end cap and second end cap. The first end cap and second end cap are then rotated in unison while crimping the circumferences of the first end cap and second end cap, therein securing the plurality of blades to the first and second end caps and fixing the desired longitudinal pitch of the plurality of blades from the first end cap to the second end cap.

Abstract: A method and ground support equipment (GSE) for attaching an engine core to an engine fan module on an aircraft pylon. The GSE may comprise GSE supports and lifting components attached to the pylon, two suspension rails attached to the lifting components, two translating rails translatably attached to the two suspensions rails and fixedly attached to opposite sides of the engine core, and two alignment fittings fixed to the engine fan module. The method of using the GSE may comprise lifting the engine core vertically using the lifting components and anchoring the suspension rails to the alignment fittings. The translating rails and engine core may then be translated in an aft-to-forward direction such that portions of the translating rails engage portions of the alignment fittings to cooperatively guide the translating rails into a final forward position in which the engine core is aligned relative to the engine fan module.

Abstract: A method and apparatus for inserting blades into a centrifugal blasting wheel to install blades without injury to fingers or hands. The apparatus uses a rotatable blade retainer with a blade guide slot that allows each blade to be installed through the blade guide slot while other installed blades are supported by the outer surface of the rotatable blade retainer. Once all blades are safely installed, the center section of the centering plate is inserted to cover the rotatable blade retainer.

Abstract: A method for manufacturing an impeller of a centrifugal rotating machine that is approximately disk-shaped and in which flow passages are formed between a plurality of blades and disposed in a radial manner from the inner circumferential side to the outer circumferential side, provided with a first flow passage formation step that forms a first region on the outer circumferential side within the flow passage by inserting an electrode of a shape fitting to the flow passage with the electric discharge machining method from the outer circumferential side of the disk-shaped body having an outer shape of an impeller, and a second flow passage formation step that forms a second region on the inner circumferential side within the flow passage from the inner circumferential side of the disk-shaped body.

Abstract: A method for confirming the position of at least one variably positionable turbine vane is disclosed herein. The method includes the step of mounting at least one camera on an exterior of an at least partially assembled turbine engine. The method also includes the step of generating visual data with the at least one camera corresponding to a position of a turbine vane actuation structure positioned on the exterior of the at least partially assembled turbine engine.

Abstract: A joining structure of a rotation part of a rotary machine, where the rotation part including blades and a shroud, includes a welded part made up of a solidified melted part of the blades and the shroud, and a brazed part disposed at a junction part of the blades and the shroud.

Abstract: The described embodiments relate generally to optimizing airflow in a computer system. By modifying the external surface of centrifugal cooling fan enclosures the pressure drop associated with airflow moving around the enclosures can be reduced. This is generally accomplished by rounding off hard edges from the outside of the cooling fan enclosure as well as forming cover surfaces rather than simply using flat cover surfaces. In some cases this can also involve modifying the shape of the fan inlet, or even contouring the shape of the cooling fan blades to allow air to flow more easily through the computer enclosure.

Abstract: Systems and methods for attaching one or more impellers to a shaft and attaching composite rings to a back and front lip on each impeller to secure the impellers for high angular velocity operation. The composite rings are constructed of a material that provides a greater specific strength and greater specific stiffness relative to the material of the impellers. In multi-impeller assemblies, an impeller spacer is attached between each pair of impellers.

Abstract: The air cycle machine insert and method of repair provides an economical repair of the turbine housing section of an air cycle machine, rather than scrapping the component and replacing with a new section. The toroid shaped insert or liner has a U-shaped cross section, configured to fit closely within the turbine air passage of the air cycle machine. A throat insert is also provided. The existing throat flange extending outwardly over the turbine air passage is removed for installation of the insert. High temperature silicone sealant is preferably placed between the wall of the turbine air passage and the liner, after machining the air passage wall to remove irregularities. The liner is then installed and mechanically secured with one or more rivets, the throat insert is installed to replace the previously removed throat flange, and the repaired turbine housing reassembled with the air cycle machine to complete the repair.

Abstract: Disclosed is a method of producing a stator blade for use in a turbo-molecular pump. The method includes subjecting a metal plate to a slitting process to form a blade element having an upstream edge surface and a downstream edge surface, wherein a laser beam is emitted onto the metal plate at an incident angle oblique to a principal surface of the metal plate. Thus, the upstream edge surface and/or the downstream edge surface can be formed to extend obliquely relative to the principal surface of the metal plate, in a simple manner, while eliminating a need for a burr removal operation which would otherwise be necessary in a punching-based slitting process.

Abstract: In one aspect, a fan assembly is provided that can be manufactured while producing a significantly reduced amount of scrap material. More specifically, the fan assembly utilizes a hub ring and one or more hub strips to support a plurality of blades rather than a solid center disc or end disc used by some prior approaches. In another aspect, a method is provided that includes bending a member into an annular configuration and joining end portions of the member together to rigidly fix the member in the annular configuration. The rigid annular member may be used as an end ring, a hub ring, an orifice, or other component, while producing significantly less scrap material than traditional approaches.

Abstract: An impeller is provided having a first plate, a second plate, a plurality of blades being positioned between and connected to the first and second plates, and at least one brace member having first and second planes positioned between and connected to two blades such that the brace extends generally perpendicular from the first blade and extends from the second blade at an angle.

Abstract: A method and apparatus for solar attic fan with air flow guide have been disclosed. In one version a solar array provides energy for a fan having an air flow guide within a shroud thereby decreasing back pressure and increasing air flow.

Abstract: A resin cross flow fan and a method for manufacturing a resin cross flow fan are provided in which an annealing step can be omitted and the number of circular disks can be reduced, and which provides improved fan strength and air blowing performance. A resin cross flow fan is disposed with a plurality of blades and a plurality of plates. The plurality of blades are annually disposed about a rotation axis. Insertion portions each constituted by a hole or a groove into which each blade is inserted and projecting portions that projects from the periphery of the insertion portions in a direction of the rotation axis are formed on each of the plurality of plates disposed spaced apart in the direction of the rotation axis. Each blade is fixed to the projecting portions by laser welding.