Abstract: A cooling fan comprises a rotor configured to generate airflow. The cooling fan further comprises an outlet guide vane adapted to receive the airflow generated by the rotor and to orient the airflow in a substantially axial direction relative to the rotor. The cooling fan further comprises a diffuser configured to receive the airflow from the outlet guide vane and produce airflow with higher static pressure relative to an inlet of the diffuser. The cooling fan produces a work coefficient greater than 1.6 and a flow coefficient greater than or equal to 0.4.

Abstract: A floor care appliance is provided with a motor-fan assembly that includes a diffuser to improve efficiency but also reduces any resultant noise generated. The diffuser is disc shaped and has a plurality of equi-distant spaced vanes around the periphery. The vanes improve performance by converting air velocity into static pressure rise. The vanes also reduce noise by making the flow more uniform. A periphery of radially extending return vanes are arranged circumferentially on one side of the disc. The return vanes remove swirl and improve performance before directing the air through the interior of the motor for cooling.

Abstract: A combinative standing fan includes a vertical shaft fan, a first, and a second tubular cover. The first and the second tubular cover respectively consist of a front half cover and a rear half cove. The front half covers of the two tubular covers are provided with plural wind inlets, and the rear half covers of them are provided with plural wind outlets. The first tubular cover has a guide groove in an upper end, and the second tubular cover has a bottom edge at the bottom to fit with the guide groove so the second tubular cover may rotate relative to the first one, with the guide groove and the bottom edge. When the shaft fan operates, air comes in the wind inlets of the two tubular covers and blows out of the wind outlets of them. The second tubular cover is rotatable to the first one, letting the fan blow winds in many different angles or directions simultaneously.

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 water driven turbine has a divergent cone coupled to the exit end of the housing in which diameter of the cone increases with increasing distance from the exit end of the housing. A diverter formed of rigid material surrounds the free end of the cone and defines an annular space therebetween through which a flow of water passes to accelerate the flow exiting the turbine housing. The diverter is shorter in the length than the divergent cone and longitudinally overlaps the divergent cone. The diverter also has straight walls which are sloped to extend in the longitudinal direction away from the exit end of the housing at an inward incline between the leading end and the trailing end thereof.

Abstract: A turboshaft engine, such as for example a turbine, including a segmented seal between two longitudinally adjacent elements such as, for example, a casing and a ring of sectors of vanes. According to one embodiment, a seal is interposed between a casing and a ring of sectors of vanes and includes a plurality of flexible segments having a straight deformation zone and a straight fluid-tight bearing zone.

Abstract: A set of cooling air blowers for machines which require cooling air during operation. The blowers each include an outlet having an anti-reverse flow feature for preventing the flow of air into the blower from externally of the machine should the blower fail, thereby ensuring that the remaining operating blowers are able to maintain a normal and adequate flow of cooling air through the air inlet of the machine and outwardly through the outlets of the remaining operating blowers. Each blower generally includes a blower housing having an inlet, an outlet, and an internal cavity in which an impeller is rotatably disposed, the impeller driven by an electrical motor mounted within the blower housing.

Abstract: The invention relates to a high-pressure fan which comprises an electric motor provided with a shaft that goes through it; blade wheels which are mainly made of a carbon fibre-based composite material, arranged on both sides of the electric motor and mounted directly on the shaft of the electric motor; fan housings surrounding the blade wheels; and an intermediate channel which connects a pressure opening of one fan housing to a suction opening of the other fan housing, the intermediate channel being integrated into the base structure of the high-pressure fan.

Abstract: A case that is used for an electronic or electric device has an opening portion arranged at a vicinity of a fan motor that generates airflow inside and outside the case. The opening portion has a protection portion for preventing a finger or other matters from entering the fan motor. The protection portion includes a first rib group extending linearly in a lateral direction, a second rib group extending linearly in a second direction vertical direction. Each of the ribs has an inclined surface that is along a direction of the airflow exhausted from the fan motor and faces the inside or the outside of the opening portion.

Abstract: A heat dissipating fan includes a casing having an outlet, a base mounted in the outlet of the casing, and a plurality of air guiding members mounted in the outlet and connected between the base and the casing. Each air guiding member defines at least one air concentrating area for concentrating air, for guiding airflow, and for increasing wind pressure when an impeller mounted on the base turns.

Abstract: An exhaust diffuser unit for a gas turbine engine includes an outer ring, a diffuser cone and vanes, all made from a ceramic matrix composite material. Each vane has end components which have apertures through which a metallic support strut extends. The support strut is rigidly secured at its radially outer end to a diffuser casing, and is slidably but non-rotatably received at its radially inner end in an aperture in a boss provided on a drum. Structural loads between the casing and the drum are transferred through the strut independently of the vane. Gas loads on the vane are transferred to the strut by way of metallic end components.

Abstract: The axial fan for a computer comprises a rotatable fan blade unit and a motor unit. The fan blade unit comprises a fan head and a plurality of fan blades arranged radially thereto. The motor unit is held by supports passing through the airflow. The supports have a distance of at least 7.5 mm from the fan blades measured in axial direction. Due to this distance being larger in comparison to known solutions the fan produces less disturbing noise.

Abstract: A structural turbine exhaust case of a gas turbine engine, comprises inner and outer case portions; a bearing housing connected to the inner case portion for supporting a main spool of the gas turbine engine; and a plurality of airfoils extending between the inner and outer case portions, airfoils structurally connecting the inner case portion to the outer case portion.

Abstract: A diffuser (30) for a centrifugal compressor (60) having a flow slot (34) formed between the leading edge portion (36) of a diffuser vane (32) and an adjoining diffuser wall (70) for the passage of working fluid (67) over the vane from the pressure side ((40) to the suction side (42) of the vane. The portion (38) of the working fluid passing over the vane is injected into the flow boundary region (43), thereby minimizing the growth of a flow separation zone (58) along the suction side.

Abstract: A fan of an aircraft engine is provided with a rotating fan rotor for feeding air aftward as a spiral flow and a stator vane for rectifying the spiral flow to be an axial flow. The fan stator vane is provided with a hub end portion extending radially relative to a rotating axis of the fan rotor and a tip end portion leaning toward a suction side. Leading edges of the hub end portion and the tip end portion have sweepback angles of from 27 degrees to 33 degrees relative to a radial direction defined by the rotating axis.

Abstract: A method of assembling a gas turbine engine includes providing a plurality of stator vane sectors that each include an equal number of stator vanes that are circumferentially-spaced such that a first circumferential spacing is defined between each pair of adjacent stator vanes within the sector, and coupling the plurality of stator vane sectors together to form a stator vane assembly such that a second circumferential spacing is defined between each pair of adjacent stator vanes coupled to adjacent sectors, wherein the second circumferential spacing is different from the first circumferential spacing.

Abstract: A compressor scroll housing for use in conjunction with turbo-machinery, particularly applicable in aircraft. The scroll housing can include a plurality of scroll vanes arrayed around the scroll housing. Scroll vanes, integrally formed with the scroll housing, carry stress load on the scroll housing, including the load from fluid pressure within the scroll and carcass loading from the engine. The plurality of scroll vanes adapted for guiding flow of fluid from an inlet to an outlet while supporting the scroll housing. Chord length and cross sectional area of each scroll vane can be sized to maintain an equal stress in all scroll vanes. A method of making the scroll housing for use with an impeller connected to an engine is disclosed, as well as a method of operating turbo-machinery including supporting a load on the scroll housing with scroll vanes while maintaining an equal stress on each scroll vane.

Abstract: An outlet airflow direction control device includes a fan and a frame. The frame has an inlet and an outlet via which an amount of fluid flows into and out of the frame, and is internally provided at the outlet with a hub seat for supporting the fan thereon. A plurality of fluid control elements are radially provided between the frame and the hub seat to connect them to each other. Each of the fluid control elements is connected at an outer end, which forms a directional-guide section, to the frame, and at an inner end, which forms a connecting section, to the hub seat. The directional-guide section has an area larger than that of the connecting section, so that the fluid control elements are adapted to control a flow direction of the fluid flown out of the outlet of the frame.

Abstract: A turbine flowpath structure includes a first generally U-shaped flowpath channel having a first leg having a first inwardly facing side shaped as a turbine blade suction-side airfoil surface, a second leg having a second inwardly facing side shaped as a turbine blade pressure-side airfoil surface, and a web connecting the first leg and the second leg, wherein the web has an inwardly facing inner flowpath surface. There is typically provided a spar that engages at least one of the first leg and the second leg. In one application, there is a plurality of the generally U-shaped flowpath channels arranged around the periphery of a turbine disk, and a plurality of spars positioned between each pair of adjacent generally U-shaped flowpath channels to anchor them to the turbine disk.

Abstract: A guide vane 100 is provided in which sheet portions 14, 15 are secured together to define an aerofoil profile 11. Between ends 20, 21 of the guide vane 100 there is a non linear variation in the maximum chordal thickness 13. Thus, greater maximum chordal thickness 13b in central portions of the guide vane 100 provide stiffness while ends 20, 21 which are generally formed from solid material have a smaller maximum chordal thickness such that a stiffer vane 100 can be provided with reduced material weight and therefore costs.

Abstract: A stator blade for a hydrokinetic torque converter, the blade profile having geometric characteristics that improve torque flow efficiency in the converter torque flow circuit, whereby the torque converter efficiency at high speed ratios is improved without significant adverse effects on the converter torque ratio at stall and at low speed ratios.

Abstract: A discharge collector and diffuser for a screw compressor, including a housing having an inlet for receiving flow from a compressor and an outlet and defining therebetween a collector portion, a transition portion and a diffuser portion, the collector portion being adapted to receive a plurality of non-parallel streams from a compressor and to guide the streams into a substantially parallel flow direction, the housing further having a splitter plate positioned in the collector portion to separate the non-parallel streams from each other, whereby the streams are maintained separate until they are substantially parallel, thereby reducing flow losses.

Abstract: A gas turbine engine strut segment includes a strut, which may be hollow, extending radially between co-annular radially inner and outer platforms, axially spaced apart inner platform flanges extending radially inwardly from the inner platform, and axially spaced apart outer platform flanges extending radially outwardly from the inner platform. At least one inner set of coaxial tapered inner holes extend axially through the inner platform flanges and at least one outer set of coaxial tapered outer holes extend axially through the outer platform flanges. The inner set of coaxial inner holes define an inner conical surface and the outer set of coaxial outer holes define an outer conical surface. Each of the axial spaced apart platform flanges may be circumferentially continuous or scalloped having spaced circumferentially apart lugs. The strut may have two inner sets of coaxial tapered inner and outer holes extending axially through the inner and outer platform flanges, respectively.

Abstract: A heat-dissipating device and a housing thereof. The heat-dissipating device includes an impeller and a housing. The impeller includes a hub and a plurality of rotor blades disposed around the hub. The housing includes an outer frame, an air-guiding part, and a plurality of stator blades. The air-guiding part is formed on at least one side of the outer frame. The stator blades are disposed in the outer frame corresponding to the air-guiding part. The stator blades guide the airflow through the blades, and greatly increase the static pressure of the airflow discharged from the heat-dissipating device.

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 connecting duct for providing a fluid pathway between an outlet of a low pressure compressor and an inlet of a high pressure compressor is provided. The connecting duct includes a main body that defines a fluid pathway adapted to direct a flow of fluid between a main body inlet and a main body outlet. The main body also includes a diffusing section that decreases a velocity of the flow of fluid. A flow de-swirling section is disposed between the diffusing section and the outlet of the main body. The flow de-swirling section straightens the flow of fluid.

Abstract: A blower includes a blower housing having a chamber, an impeller rotatably received in the chamber, the impeller having a plurality of blades; and at least one resonator ring associated with one of the blower housing and the impeller. The resonator ring provides a plurality of resonator cavities for absorbing noise generated by the plurality of blades. The blower housing has an inlet opening and an outlet opening associated with the chamber; and a baffle assembly sub-dividing at least one of the inlet and the outlet openings.

Abstract: A gas-jet driven rotary device is provided which, when being operated, creates a field which may be utilized to treat a variety of electrical, chemical, and mechanical systems, device and/or components for increased performance gains. The device includes a wheel-like rotor mounted between parallel walls defining part of a housing capable of being hermetically sealed such that a vacuum may be formed within the housing. One feature of the rotor is the structure forming the arcuate segment of the passageway around the shaft, which includes a flexible inner tube centered concentrically within a rigid outer tube or conduit of larger diameter. The annular space between the inner and outer tubes is in communication with the atmosphere. To power the rotary device, compressed gas is fed to it through the inlet opening into the passageway. The gas flows through the passageway and out the exit port in the form of a jet which imparts thrust to the rotor and causes it to spin.

Abstract: A device for controlling a fluid flow is disclosed. The device includes at least two fluid flow drivers, a plenum disposed to receive a fluid flow from the at least two drivers, and a baffle disposed within the plenum. The plenum has a first cross-sectional area proximate the at least two drivers and a second cross-section area at a distance from the at least two drivers, the second cross-sectional area being an exit for the fluid flow. The baffle has a first edge restrained proximate the first cross-sectional area and a second opposing edge freely disposed proximate the second cross-sectional area. The baffle has a surface area responsive to the fluid flow within the plenum to reduce a backflow if one of the at least two drivers is operational and another is non-operational.

Abstract: An airflow guiding structure for the heat dissipation fan includes a housing, a base and a plurality of guiding members. The housing is formed with an air outlet at which the base and the guiding members are provided. The base is used to support a fan wheel and supported by the guiding members. The guiding members are arranged in at least two guiding directions at the air outlet and at least one of the guiding members is inclined to an axis of the housing. When the fan wheel rotates, the guiding members guide airflow to the two guiding directions.

Abstract: A multi-stage compressor and associated compressor housing and method are provided. The housing defines an aperture for receiving a compressor wheel for successively compressing a gas in first and second stages. First- and second-stage inlets are fluidly connected to the aperture in generally axial directions, and first- and second-stage volutes extend at least partially annularly therearound so that each volute is configured to receive gas flowing generally radially outward from the compressor wheel. In addition, first and second passages fluidly connect the first-stage volute to the second-stage inlet. Each passage extends from the first-stage volute to a position radially outward of the second-stage volute and therefrom to the second-stage inlet at an axial position opposite the second-stage volute from the first-stage volute.

Abstract: Disclosed is a composite heat-dissipating system and its used fan guard which can impart a supercharging function to the heat-dissipating fans of the composite heat-dissipating system for efficient heat dissipation and reduces the noise generated when the heat-dissipating fans are operated. The fan guard includes a frame and a set of guard blades arranged inside and fixed onto an inner surface of the frame. The fan guard can be arranged upstream or downstream of the rotor blades of the heat-dissipating fans and assembled with the heat-dissipating fans in series or in parallel to supercharge the airflow out of the heat-dissipating fans.

Abstract: A fan device for decreasing eddy flow area includes a fan module and a ring unit. The fan module has a fan rotor and a motor stator set and the fan rotor is movably connected to the motor stator set. The motor stator set has a guide flow device, which provides a plurality of guide flow blades. The ring unit provides a plurality of locating slots corresponding to the guide flow blades so as to be inserted with the guide flow blades easily. The ring unit can reduce the eddy flow area formed by way of counter flow reflected from an electronic component under the guide flow device to increase flow rate and speed of the air flow. The ring unit is independently attached to the guide flow device so that it is easy to be mounted to the guide flow device and capable of lowering the production cost.

Abstract: An axial-flow fan has a plurality of main fins (702), and auxiliary fins (703) provided between the main fins (702), where the position of a front end of the auxiliary fin (703) relative to X axis and the position of a front end of the main fin (702) adjoining the auxiliary fin in reverse-rotary direction are aligned, the height of the auxiliary fin (703) is approximately three fourths of the height of the main fin (702), and the cross sections of the main fin (702) and the auxiliary fin (703) taken along the axial direction of the main shaft are streamlined.

Abstract: An annular platform for the nozzle of a low-pressure turbine in a turbomachine, said nozzle having a longitudinal axis and comprising at least one fixed vane disposed downstream from at least one moving blade of a high-pressure turbine, said platform comprising a downstream portion supporting said fixed vane radially defining an aerodynamic channel which extends longitudinally between a leading edge of said fixed vane and a trailing edge of said moving blade, said platform further comprising an upstream portion extending longitudinally beyond the leading edge of said fixed vane towards the trailing edge of said moving blade so as to lengthen said aerodynamic channel.

Abstract: A heat dissipation fan includes a fan module and a flow guide device. The fan module further includes a motor stator set and a fan rotor. The motor stator set provides an axial core and an annular join part. The fan rotor is rotationally joined to the axial core. The flow guide device provides a plurality of flow guide blades. An annular section is provided on the flow guide blades and the flow guide blades is integrally made with the annular join part or the flow guide blades is integrally made with a frame and the frame being attached to the motor stator set. The annular section can reduce an eddy flow area, which is formed due to an electronic component impeding the air flow and creating counter air flow under the flow guide blades, so as to increase flow speed and flow rate of the air flow blown by the fan rotor and approaching an electronic component.

Abstract: A turbine rear frame includes a row of outlet guide vanes extending between outer and inner bands. Each of the vanes is bifurcated into a forward prow integrally joined to an aft stern by a septum therebetween. The prow and stern collectively define the aerodynamic profile of each vane which is locally interrupted at the septum.

Abstract: A wind turbine device of increased efficiency is comprised of a set of fixed airfoils that direct wind into a rotor having a plurality of blades. The fixed airfoils may extend to the ground to increase the amount of wind directed into the rotor and may be manufactured from concrete. The rotor blades have a vented portion near the axis of rotation that has been found to increase efficiency for certain blade geometries. For other blade geometries, increased efficiency is observed with no gap at the axis of rotation. The rotor may also be manufactured from composite materials to increase strength while decreasing the moment of inertia for the rotor.

Abstract: A port is employed for a fan chamber which defines a volume formed by at least one generally continuous vertical wall connecting a horizontal base wall with an opposing horizontal exit wall. Within the volume is a fan rotatable in a plane generally parallel to a plane of at least one of the horizontal walls. The port is formed of an inner side located between a center of the exit wall and an outer edge of said the wall, an outer side located between the inner side and the outer edge of the exit wall, and two opposing secant sides connecting respective ends of the outer side to the inner side. A shape of the inner side forms a straight line or a convex line with respect to the center of the exit wall.

Abstract: In a centrifugal blower, a centrifugal fan is housed in a scroll casing and driven by a motor. The scroll casing includes a suction scroll wall and a motor scroll wall. The scroll casing forms a scroll air passage between a first protruding portion of the suction scroll wall and a second protruding portion of the motor scroll wall. A fin is provided in the scrolled air passage as a directing member for directing a secondary flow in a direction parallel to a direction of a primary flow discharging from the centrifugal fan. The fin restricts the secondary flow from colliding with the primary flow, thereby to reduce noise due to interference of the air flows.

Abstract: A fan assembly has a base portion that remains stationary during the operation of the fan assembly, the base portion having a stationary base support plate. The assembly also includes a blower portion that includes an oscillating top plate, a blower that is coupled to the top plate and which oscillates when the top plate oscillates, and a grill cover that is coupled to the base support plate so that the grill cover remains stationary even when the top plate and the blower oscillates. The assembly can optionally include a smooth glide mechanism positioned between the top plate and the base support plate.

Abstract: A heat-dissipating fan includes a casing having an air outlet, a base mounted in the air outlet, and a plurality of guiding plates in the air outlet. An impeller is mounted on the base that is supported in the air outlet by the guiding plates. The guiding plates are parallel to one another and extend in a direction having an inclining angle with respect to an axial direction of the air outlet. The guiding plates guide airflow and increase wind pressure when the impeller turns.

Abstract: A windmill. A wind intake section has wind guide plates, a wind inlet defined between two adjoining wind guide plates, and a wind inlet opening and closing device placed at the wind inlet. The wind inlet opening and closing device is opened by the wind flowing through the wind inlet into the windmill and closed by the wind flowing through the wind inlet out of the windmill. A power generating section is disposed to rotate rotors by the wind introduced into the windmill through the wind intake section and thereby generate electricity. A wind exhaust section has a wind outlet, and a wind outlet opening and closing device placed at the wind outlet. The wind outlet opening and closing device is opened by the wind flowing through the wind outlet out of the windmill and closed by the wind flowing through the wind outlet into the windmill.

Abstract: A centrifugal fan (10) with improved efficiency and decreased noise, comprising a fan housing (12), in the form of a fan housing, with parallel sides (22, 23), which are fixed to opposite edges of a casing scroll (24), and a fan or impeller (25) with blades (27), positioned inside the fan housing (12), in such as way that it does or does not overlap the end of a inlet cone (26); a flow sharing device element (20), shaped and produced in a single piece (20) or in more than one piece (28, 30), with at least one appendage facing the inlet cone (26), and if necessary overlapping the impeller (25) and extending for the width of the discharge opening (21), in such as way to allow homogenization of the flow delivered and reduction of vortices, which cause high noise and loss of efficiency of the centrifugal fan (10).

Abstract: A blower assembly that includes an exhaust restrictor to aid in operating the blower assembly over a range of operating conditions. The blower assembly includes a blower housing having a housing exhaust opening that receives a flow of exhaust gases created by a rotating impeller. An exhaust transition section extends between the housing exhaust opening to an expanded diameter exhaust outlet sized to receive a flue pipe. The blower housing includes an exhaust restrictor positioned in the exhaust transition section between the housing exhaust opening and the exhaust outlet. The exhaust restrictor is integrally formed with a portion of the blower housing and includes a curved back wall to aid in the transition between the housing exhaust opening and the exhaust outlet.

Abstract: Bidirectional hydraulic pump that comprises a hydraulic body (1) comprising an inlet port (2) from which receives a water flow, a first outlet port (3) and a second outlet port (4); an impeller housed in said hydraulic body (1), which causes the water flow to move in either one direction or the other; and a valve body (5) that surrounds the impeller. The valve body (5) comprises at least one orifice (6) and said valve body (5) is slidable on the internal surface of the hydraulic body (1) in one direction or the other, due to the action of the water flow, between a first position wherein the orifice (6) is aligned with the first outlet port (3) and a second position wherein the orifice (6) is aligned with the second outlet port (4).

Abstract: The invention is an Exit Stay Apparatus for Francis and propeller hydraulic turbines. The purpose of the invention is to eliminate the loss of turbine efficiency and strong pulsations in draft tube caused by the axial circular vortex in all turbine operating regimes other than optimum without a noticeable decrease in maximum efficiency. It can be incorporated not only into newly fabricated hydraulic turbines, but also retrofitted into existing turbines. The Exit Stay Apparatus has a crown and exit stay vanes secured to the the crown. When installed in the turbine, the exit stay crown is located immediately after the runner crown, which is truncated at the bottom by a plane perpendicular to the central axis of the turbine. The exit stay crown together with the truncated runner crown forms water passages after the runner blade crown profile exit.

Abstract: A heat-dissipating fan includes a casing having an air outlet, a base mounted in the air outlet, an impeller being mounted on the base and having a plurality of blades, a plurality of ribs each extending between the base and the casing along a radial direction of the base, and at least one guiding ring fixedly mounted to the ribs. The guiding ring has an axial length that is longer than a width of the guiding ring in the radial direction. The guiding ring guides and divides airflow passing through the air outlet when the impeller is turning.

Abstract: A turbomolecular vacuum pump (1) has an inlet (3) and an outlet (4) and rotor and stator vanes (5 and 6), situated between the inlet and outlet. The rotor vanes (6) have front sides (11) and rear sides (12) in relation to the direction of rotation. At least a part of the rotor vanes (6) have a rear side (12) which is convex on the suction-side and concave on the delivery side. Alternately, at least part of the rotor vanes (6) have a front side (11), which is concave on the suction side and convex on the delivery side.

Abstract: A turbine nozzle includes a plurality of vanes joined at opposite ends to outer and inner bands. The inner band has a forward hook which is segmented to reduce thermal mismatch. And, in additional embodiments the vane includes an impingement baffle having preferential cooling.