Abstract: A wind turbine arranged to operate in confined area is disclosed. The wind turbine is constrained within two axially displaced end plates and diametrically opposed wind barriers. The wind barriers are parallel to the axis and extend between end plates. The wind barriers each having an axially extending inner edge radially spaced from an outer swept surface of the turbine blades by less than 20% of the turbine radius. In another embodiment, there is disclosed a 2-dimensional array of wind turbines, with wind barriers being arranged between parallel axes.

Abstract: A fan comprises an impeller and a motor. The impeller has a hub, a plurality of blades and a plurality of reinforced elements. The blades are disposed around the hub. At least one reinforced element is disposed on the active surfaces of two adjacent blades. The blades and the reinforced elements are integrally formed as a single piece. The motor connects to the impeller for driving it to rotate.

Abstract: A variable axis turbine may include multiple nested rotatable rotor assemblies. The turbine may be self-starting in slow fluid conditions while simultaneously self-limiting in fast fluid conditions. The turbine may provide omni-directional energy recovery and be self-balancing. The nested rotatable rotor assemblies may be configured to rotate independently of each other, but along the same rotational axis. Each outer nested rotor blade set may direct fluid onto the inner rotor blade sets in an aerodynamically beneficial manner. Each rotor blade set may be interconnected with a rotating generator hub that encloses a rotating generator element that rotates along with a corresponding rotor blade set for electric power generation. The blades may be “smart blades” that are sufficiently flexible to be self-configuring during rotation and soft enough to partially absorb sound. The blades may have a variable hardness and a two or more dimensional twist.

Abstract: A water turbine is disclosed comprising a rotor mounted to be rotatable about an axis. The rotor comprises at least three blades for causing the rotor to rotate about the axis when the blades are located in flowing water. The rotor comprises a plurality of members in the form of a triangulated structure, and at least one of said members comprises one of said blades.

Abstract: An impeller is provided for a blower having a blade (15), a plurality of notches (17) provided at predetermined intervals on a side edge of the blade (15), and a plurality of smooth portions (18) each provided between a pair of the notches (17). Since a transverse vortex discharged from the side edge of the blade (15), and on a large scale, is organized by vertical vortexes formed in the notches (17) on a small scale so as to be segmented into stable transverse vortexes, it becomes possible to reduce aerodynamic noise.

Abstract: A plurality of curved rectangular blades are arranged in a circumferential direction on a periphery of a disc, forming a pipe-like basket shape with an opening on a front side of the disc. Rotation of the disc draws in air from the opening and draws out the air in a centrifugal direction through a space between the blades. The blades are formed of a thick plate part close to the disc and a thin plate part that is thinner than the thick plate part and farther than the thick plate part from the disc. A bulge serving as a boundary between the thick plate part and the thin plate part is formed on a negative pressure surface of the blades, which is of curved convex shape.

Abstract: A wind turbine for generating electricity is configured as a drum with a housing that has adjustable shutters to control the amount of wind reaching the turbine blades. Alternatively, the turbine blades can be pivotably mounted and opened and closed using a cam follower, cam track system to minimize wind exposure to downstream turbine blades.

Abstract: A cut-off construction for a transverse fan assembly, including for use with agricultural combine harvesters, to permit the transverse fan assembly to be operated to provide increased air flow volume at a lower rotational fan speed, which cut-off construction includes generally planar inner surfaces on first and second body portions that are positioned laterally to one another along the top of the output throat of the air plenum of the transverse fan assembly between the outer periphery of the fan and a baffle construction of the transverse fan, such that the inner surface of the first body portion is disposed at a cut-off inclination angle ?, dependent upon certain parameters of the fan, and the inner surfaces of the first and second body portions intersect with one another in such a way that an upper wall for the output throat is formed by the cut-off construction and by the baffle construction of the fan assembly, which upper wall has a concavity formed therein and therealong near the outer periphery of th

Abstract: A multi-blade fan includes a spirally-shaped housing which has a bell-mouth orifice on one side, a sucking inlet and an exhausting outlet, an impeller which is placed in a housing and has a plurality of blades supported by a main plate and a lateral plate at both the axial ends, and a motor for driving the impeller. A cross section, cut along vertically with respect to a rotary shaft of the impeller, of each one of the blades has a given shape which allows a main air stream to flow along a back face of each one of blades.

Abstract: A blower wheel comprising a centerdisk comprising a conical portion (16), a planar portion (160) for receiving a hub (7), and an arcuate portion (15) intermediate the conical portion and an outer portion (14), a plurality of blades (2) connected to the outer portion, the blades further connected to a ring (3), and a hub connected to the planar portion, the hub comprising a fastener (13) for attaching the centerdisk to a shaft (200).

Abstract: A portable electronic device includes a casing, an electronic component disposed in the casing, and a thermal module for dissipating heat of the electronic component. The thermal module includes a heat pipe, a fin unit, and a transverse fan. The heat pipe includes an evaporating section thermally attached to the electronic component, and a condensing section thermally attached to the fin unit. The transverse fan is arranged in the casing for generating an airflow through the electronic component and the fin unit. The transverse fan includes a rotor, and a sidewall on a floor of the casing and surrounding the rotor. The sidewall defines an air inlet and an air outlet therein. The air outlet faces to the fin unit. The air inlet faces to the electronic component.

Abstract: According to some embodiments, a method and system are provided to receive an airflow at a blower fan via an axial fan, and expel the airflow via a blower fan. The blower fan comprises a hub associated with an axis of rotation, and the axial fan comprises the hub.

Abstract: An impeller applied to a centrifugal fan includes a base plate, a hub and a plurality of first blades. The hub is connected to the base plate and the first blades are disposed on the base plate with respect to the hub as a center. Furthermore, the hub has a plurality of second blades disposed around its outer wall to enhance its performance. A centrifugal fan including the impeller is also disclosed.

Abstract: A double inlet centrifugal fan includes an impeller and fan inlet port. The impeller has a main plate connected to the drive shaft in a fan casing, fan side plates, and a plurality of blades between the main plate and each of the fan side plates. The fan inlet port has an opening corresponding to the inner diameter of the blades. The blades on the side of the larger pressure loss in the suction air passage to the fan inlet port have a smaller inner diameter than the blades on the side of the smaller pressure loss. This equalizes the total pressure increase in the blades along the drive shaft, resulting in a compact double inlet centrifugal fan capable of supplying the required air flow.

Abstract: In a centrifugal fan the diameter of the impeller is rendered less than 20 mm, yet by rotating it under rotational conditions in which the centrifugal force along the impeller periphery is 10,000 m/s2 or more, the static pressure that the fan generates is heightened. At the same time, rendering the vane spacing a predetermined width or less reduces noise. Configuring in this way produces a small-scale, high-static-pressure, low-noise fan for cooling electronic devices. Furthermore, by mounting the centrifugal fan on a heatsink having densely arranged heat-dissipating projections a small-scale, high-cooling-capacity, quiet cooling device is realized.

Abstract: A cross-flow fan impeller for circulating gas in a transversely excited, pulsed, gas discharge laser is disclosed and may comprise a plurality of hubs, the hubs spaced apart along the impeller's rotation axis and establishing at least two impeller segments wherein a first segment has an output flow within 80-120% of a second segment and the first and second segment having differing blade pass frequencies. In some embodiments of this aspect, the first segment may have n number of blades the second segment m number of blades, and m?n. In one embodiment, the impeller may be configured with n=29 and m=23 and in another embodiment, the impeller may be configured with n=23 and m=19. The impeller may be configured wherein n and m are prime numbers.

Abstract: A fan device for a smoke exhauster includes a housing having an upper plate and a lower plate, and the upper plate is secured to a motor and rotated by the motor, the lower plate includes a bore to allow an air to flow into the housing of the fan device, and a number of fan blades secured between the upper plate and the lower plate and each fan blade include a curved bottom edge to allow the air to flow into the chamber of the fan device before contacting with the fan blades, and the fan blades each include a number of orifices for reducing a noise generated by the fan blades when the fan blades are rotated relative to the motor. The fan blades are preferably disposed inclined relative to the upper plate and the lower plate.

Abstract: A cross flow fan of an indoor unit of, for example, an air conditioner includes a pair of disc-shaped end plates and a plurality of fan blades attached to the end plates in a ring-shaped arrangement. Each of the fan blades has a cross sectional area ratio of Sa/Sb in a range of 1.3 to 1.6, preferably, 1.4 to 1.5, in which Sa is a sectional area of a fan inner peripheral side half portion of the blade and Sb is a sectional area of a fan outer peripheral side half portion of the blade at a time when the fan blade is cut perpendicularly with respect to a longitudinal direction of the fan blade and divided into two sectional areas along a central division line in a blade chord direction.

Abstract: A cellular wheel sluice for the feeding of hot bulk material with stabilization of the radial play between the web ends of the cellular wheel and the wall of the housing borehole by means of the combination of materials of different thermal expansion coefficients, whereby for stabilization of the radial play between the walls of the cellular wheel and the case wall its changes of diameter caused by heat are compensated. End strips used for sealing the gap, in their radial expansion, are fixed in a retention body with a low thermal expansion coefficient and therefore are always kept at a temperature-independent constant external diameter from the cellular wheel shaft.

Abstract: A wind turbine, having a generator to generate electricity and including a first rotatable power element and a second rotatable power element adapted for contra-rotation relative to one another about a generator axis, a pair of rotors to convert wind energy into rotational energy and generally disposed at a first end of the generator and adapted for rotation about a rotor axis offset from the generator axis, and including a first rotor and a second rotor wherein the first rotor is disposed between the second rotor and the generator, and a transmission to couple the pair of rotors to the generator, and including a first driveshaft coupled to the first rotor, a first drive element coupled to the first driveshaft, a first driven element coupled to the first drive element and to the first rotatable power element of the generator, a second driveshaft coupled to the second rotor and extending through the first driveshaft, a second drive element coupled to the second driveshaft, and a second driven element coupled t

Abstract: A fan assembly and impeller thereof. The fan assembly includes a plurality of blades and a hub. The hub includes an upper surface and a center point. The blades have bottom portions arranged in a circle on the upper surface with respect to the center point.

Abstract: The invention relates to a centrifugal fan impeller (1) having an axis of rotation (6) and comprising one or more modules (2). Each module (2) comprises a mounting disc (4), at least one connecting ring (5) and a plurality of blades (3) extending between the mounting disc (4) and the connecting ring (5). The blades (3) are connected to the disc (4) and ring (5) at an angle (?) relative to the axis (6) of the impeller (1). The angle (?) at which the blades (3) are inclined may range from 5 to 30 degrees and the blades (3) may be rectangular or trapezoidal in shape depending on the type of performance required: improved capacity with rectangular blades or improved pressure head and acoustic properties with trapezoidal blades. Top performance is thus combined with acoustic comfort.

Abstract: A motor-operated fan includes a housing, a motor secured in the housing, and an impeller rotatably mounted on the housing and rotated by the motor. Thus, the impeller has a plurality of blades and a plurality of auxiliary blades to produce a larger air flow when the impeller is rotated so as to push a ball located above the air cushion table, so that the ball is moved above the air cushion table in an irregular manner at a higher speed, thereby providing an amusement playing effect for players.

Abstract: The present invention is a radial fan having an axial fan blade configuration. The present invention comprises a hub; a first set of blades around the hub; and a second set of blades on the extending part. Therein, the hub comprises a hollow at the center, an axle, a guiding part and an extending part. The gaps are each between every two adjacent blades of the second blade set, having the same distance between every two adjacent gaps. The second set of blades comprises a plurality of blades around outside of the first set of blade and a ring connected with the blades. Accordingly, the structure of the blades may increase the wind pressure, reduce the energy loss by the blade rotation and raise the work efficiency of the blades while the noise is lessened and the working current is lowered.

Abstract: The disclosure relates to a fan impeller including a base plate and a plurality of fan impeller blades fixed to the plate. The fan impeller blades are positioned in an essentially vertical manner on the base plate and have a substantially radial arrangement, each fan impeller blade including a front edge facing radially outwardly that is substantially perpendicular to the base plate, a rear edge facing radially inwardly that is substantially perpendicular to the base plate, an exterior surface located on the delivery side of the fan impeller and an interior surface located on the intake side of the fan impeller. At least one raised element is mounted and/or configured on the exterior surface of at least one selection of the fan impeller blades, the element being positioned at a distance from the base plate and extending substantially in a diagonal manner away from the base plate from the front edge to the rear edge of the fan impeller blades.

Abstract: A smoke exhauster includes a motor attached to a housing, and a fan device attached to the motor and to be driven by the motor. The fan device including an upper plate, a lower plate having a bore, and a number of fan blades secured between the upper and the lower plates to form a chamber between the upper and the lower plates and to allow air to flow into the chamber of the fan device via the bore of the lower plate. Each of the fan blades includes a lower cut-off portion to allow the air to flow deeper into the chamber of the fan device before contacting with or scooped by the fan blades.

Abstract: The modified centrifugal fan wheel comprises a hollow hub and a set of blade. A hollow hub axis is disposed at the center of a hollow portion of the hollow hub. Along a top side surface of the hollow hub is a curved guiding inlet part and along a bottom side surface of the hollow hub is a curved surface with a smooth fillet extending to a closed part. A set of blades is arranged around an outer part of the hollow hub, having an up ring and a down ring. An inner part of the down ring is connected to the closed part of the hollow hub. Blades are disposed between the up ring and the down ring. Wind holes are disposed equidistantly between each of the blades and equidistant perforations are arranged on the surface of the down ring, connecting to the wind holes between each of the blades. By the closed part and the perforation of the fan wheel, low noise and low current are provided. Meanwhile, power consumption is reduced and working performance of the fan wheel is also improved.

Abstract: A ventilator fan structure includes a disk-shaped seat, an annular plate, and a plurality of blades. Each of the blades is arranged in an oblique manner along a rotational direction of the fan structure and has a primary blade portion and a secondary blade portion with different widths, thereby enhancing the suction force of each of the blades for the oil and smoke. Thus, the fan structure enhances the air drainage rate of the ventilator and reduces noise during operation of the ventilator.

Abstract: Air flows along pressure surfaces and suction surfaces of main blades of an inner blade group by rotation of an impeller. When the air passes the inner blade group, the air flowing along the suction surfaces of the main blades tends to separate from the suction surfaces, and shearing flows tend to be formed behind outer diameter end portions of the main blades. Here, the auxiliary blades of the outer blade group are placed inside the air flows passing between the main blades of the inner blade group, and therefore the auxiliary blades restrain the separation of air flows, and the shearing flows.

Abstract: An oil mist eliminator includes an impeller rotating about its axis in one direction within a casing having an inlet and an outlet. The impeller includes a plurality of circumferentially spaced blades held between front and rear discs. The front disc has a center opening for introducing an oil-contaminated air. Each blade is composed of an inner fin extending in a radial direction and an outer fin bent from the inner fin for deflecting the air proceeding between the adjacent inner fins in a forward direction, thereby creating a forced air flow for introducing the air axially from the front opening, guiding it radially between the discs, and venting it axially forwardly in a front-in and front-out fashion. Thus, even a portion of the air being guided immediately along the rear disc can be successfully deflected for collision against the outer fins without fail, maximizing oil separation efficiency.

Abstract: Cross flow fan, and air conditioner fitted with the same, the cross flow fan including a plurality of annular rims arranged at regular intervals along a horizontal direction, and a plurality of blades on a side surface of the rim vertical thereto, and along a circumference direction of the rim, wherein pitch angles between two adjacent blades are not regular, the pitch angle taking a center of the rim as an apex, and a number of blades are 32 or 35. The pitch angles of the blades are designed by a computer optimization method taking a number of the blades and the like as parameters.

Abstract: An impeller wheel includes a hub, a center plate affixed to and extending radially outwardly from the hub, and a plurality of fan blades connected to the center plate. The connection between the center plate and each fan blade includes two laterally spaced, angularly extending prongs on the center plate being tightly received in two laterally spaced and angularly extending wedge shaped receptacles in a fan blade notch to frictionally and mechanically secure each fan blade to the center plate. This connection joint can be used for any connection of a plate to another plate or to a blade and for any type of impeller.

Abstract: A fan carrier assembly for hot swap computer components such as computer fans is provided. The fan carrier assembly preferably includes a handle operable to engage a pair of latches such that when the handle is employed to remove the carrier and component from the computer system, a single motion both releases the latches from engagement as well as displaces the component from its engaged position.

Abstract: A fan according to the present invention can be monolithically molded out of a metal with a low energy in combination with a structure of a metal mold, in which gate arrangement and/or distribution of dimensions of vanes is devised in injecting a low melting-point metal such as magnesium, wherein not only production but also reproducing such as recycling are facilitated, and also a metalwave of the fan can be produced in consideration of the global atmosphere preservation.

Abstract: A method for producing a rotor of a fan, which has support disks and lamellae which each have a curved cross-sectional profile, is proposed. The method is distinguished by the fact that firstly the lamellae are pushed axially into receiving openings in the support disks. Then, the profile height of each lamella is increased as a result of the lamella being plastically deformed in the region of the receiving opening, in such a manner that the lamella becomes clamped in its receiving opening.

Abstract: A centrifugal impeller with high blade camber exhibits relatively high non-dimensional pressure and flow performance while maintaining a high operating efficiency. This invention suits itself towards applications where high operating efficiency is required in a relatively small package space or where low noise and vibration are required. The impeller blades are characterized by: a) a high positive camber at a radially inward region of the blade, for example, a maximum camber value of at least 7% of the blade chord, which occurs at x/C<0.4; and b) a large trailing edge angle, for example, a trailing edge that forms an angle of at least 70 degrees with the impeller tangent. The ratio of blade chord to impeller diameter is at least 0.15.

Abstract: The spring-back state of the blade press formed from the metallic thin plate is restricted to form the blade of wing sectional shape strictly in accordance with the design. The blade is formed into the wing sectional shape having a hollow inner part with both sides fixed to the upper plate and the lower plate being released under application of the press forming of the metallic thin plate.

Abstract: A fan according to the present invention can be monolithically molded out of a metal with a low energy in combination with a structure of a metal mold, in which gate arrangement and/or distribution of dimensions of vanes is devised in injecting a low melting-point metal such as magnesium, wherein not only production but also reproducing such as recycling are facilitated, and also a metalwave of the fan can be produced in consideration of the global atmosphere preservation.

Abstract: An air-guiding impeller for a blower. The impeller includes a rotary shaft adaptable for a motor, an annular frame, blades formed on the annular frame, and air-guiding ribs interconnected between the annular frame and the rotary shaft and inclined with respect to the annular frame.

Abstract: The invention includes a blower wheel assembly and method characterized by a hub formed with a piece of annealed carbon steel tubing cut to an appropriate length. The tubing is formed into the hub by a tube end forming machine. The hub includes a first tubular portion connected to a second tubular portion by a flange portion. The first tubular portion is dimensioned to be received by a central hole in a backplate. The first tubular portion is inserted into the central hole of the backplate and the first tubular portion is stamped against the backplate holding the hub thereto. A shaft is inserted into the second tubular portion and the second tubular portion is press fitted onto the shaft. The hub could also be formed of a piece of sheet metal with one or more tabs formed in the hub by punching holes in the hub around an annular ring. A backplate includes an array of tab receiving holes adapted to receive the one or more tabs. A tubular portion is formed by stamping a central hole using progressive tooling.

Abstract: A cross flow fan for an air conditioner constructed to allow a plurality of horizontally and sequentially arranged blades to be partitioned, each distanced by a predetermined space, by a plurality of vertically arranged diaphragms, wherein the cross flow fan comprises a through hole so formed as to have a diameter of 0.4˜0.8D against a diameter D of the diaphragm, such that fluid infused into the fan can form an eddy current, such that amount of wind from the fan is increased to improve an energy consumption efficiency.

Abstract: The invention includes a blower wheel assembly and method characterized by a hub formed with a piece of annealed carbon steel tubing cut to an appropriate length. The tubing is formed into the hub by a tube end forming machine. The hub includes a first tubular portion connected to a second tubular portion by a flange portion. The first tubular portion is dimensioned to be received by a central hole in a backplate. The first tubular portion is inserted into the central hole of the backplate and the first tubular portion is stamped against the backplate holding the hub thereto. A shaft is inserted into the second tubular portion and the second tubular portion is press fitted onto the shaft. The hub could also be formed of a piece of sheet metal with one or more tabs formed in the hub by punching holes in the hub around an annular ring. A backplate includes an array of tab receiving holes adapted to receive the one or more tabs. A tubular portion is formed by stamping a central hole using progressive tooling.

Abstract: A centrifugal blower wheel including a center disc assembly and a blade assembly. The blade assembly includes a plurality of blades, each blade including a notch which is engaged over a peripheral edge of the disc assembly in frictional engagement. The peripheral edge of the center disc assembly includes axially outwardly facing surfaces for engaging edges of the notches in the blades, and the axially facing surfaces are formed as roughened surfaces, including a plurality of grooves and/or ridges, for facilitating engagement between the notches of the blades and the center disc assembly to thereby positively prevent relative movement between the center disc assembly and the blade assembly when a torque is applied to the center disc assembly to rotate the centrifugal blower wheel.

Abstract: The invention includes a blower wheel assembly and method characterized by a steel hub with protruding lugs that mate with a corresponding array of holes in a backplate of the assembly. The lugs are riveted or otherwise deformed to upset the lug material, thereby permanently and securely attaching the hub to the backplate. The lugs may be formed on the hub by a machining process. The holes in the backplate may have stress relief portions to avoid stress concentrations in corners of the holes.

Abstract: A number of vanes 12 are disposed in a peripheral direction of a plurality of supporting disks disposed along a rotary shaft 14 at given intervals. Each vane 12 is disposed at an angular interval as determined by a logistic representation. Thereby the intensity and variations of noise levels at around 8N on the low-frequency side, as well as the noise level caused by rotary first-order sounds, can be reduced.

Abstract: An air cleaner includes a housing having an upper wall and side walls, an air filter mounted with respect to the housing, a fan including a vane-wheel having a plurality of vanes, a supporting plate extending substantially between at least two side walls for supporting the fan. An air flow directional member directs an air flow output from the fan. The vane is formed to have a winglike cross-section, and the vane-wheel includes not more than four vanes. The vane-wheel has a base plate and a shroud. Each of the base plate and the shroud is formed to have a reinforcement portion on its circumference. A U-shaped balance weight is attached to a flattened portion formed on the curled portion. The air cleaner of the present invention can reduce noise and vibration and improve efficiency of the fan.

Abstract: A cross flow fan of an air conditioner adapted to attenuate or offset high sound and low sound which are generated during operation of the cross flow fan to thereby minimize noise and to prevent restriction of revolution thereof, the cross flow fan mounted with a plurality of diaphragms 50 partitioned in multi stages and a plurality of blades 51 horizontally disposed among the diaphragms 50 wherein a distance between blades 51 disposed among the diaphragms 50 is differently arranged for respective diaphragms 50.

Abstract: A turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of the turbine blades 408 and a lower fluid pressure behind the duct. In the present invention, this vortex is enhanced by (1) an increased acceleration of the fluid passing through the duct 410 and a deceleration of the fluid passing through the blades 408; and/or (2) by a fluid redirection device 850 for directing the fluid passing through the duct towards the outer diameter of the turbine.

Abstract: The present invention aims at obtaining a ceiling built-in type air conditioner in which noise attributable to the breakaway flow of air at the front ends of the fins is decreased. For this purpose, the ceiling built-in type air conditioner has a heat exchanger 4 installed within a main body cabinet 1 having an air suction inlet 2 and an air blowing outlet 3 and has a centrifugal blower 7 installed in the air suction inlet 2. In this ceiling built-in type air conditioner, a flat-plate-shaped rectifying member 9 is placed near the middle point between the center of the air suction inlet 2 and the center of the heat exchanger 4 and is placed substantially at a right angle to the direction of the flow of air from the air suction inlet 2.

Abstract: A helical turbine assembly capable of providing high speed unidirectional rotation under a multidirectional ultra low-head fluid flow is disclosed. The assembly comprises an array of helical turbine units or modules arranged, vertically or horizontally, to harness, for example, water or wind power. Each turbine unit or module comprises a plurality of helical blades having an airfoil profile. The modules for wind power may be mounted to rotatable shafts supported by lightweight structures anchored by guy wires to the ground. The helical turbine can also a provide ship propulsion by utilizing the power of ocean waves. In a further embodiment, a cylindrical distributor is provided in the helical turbine to channel the fluid flow to the blades of the turbine, thereby increasing efficiency and power output. The helical turbine with distributor may be used to lift or lower a body either being submerged into a fast stream or dragged in the fluid.