Abstract: A casing of a centrifugal fan includes a suction port forming wall portion, an opposed wall portion opposed to the suction port forming wall portion, and a sidewall portion connecting the suction port forming wall portion and the opposed wall portion. A tongue portion is provided at the sidewall portion. The tongue portion projects into an air passage in the vicinity of a discharge port to form a narrowed air passage portion within the air passage. A leading end surface of the tongue portion is shaped such that the width of the leading end surface increases from the suction port forming wall portion, where the suction port is formed, to the opposed wall portion. The tongue portion is shaped such that the projecting length of the tongue portion into the air passage continuously decreases from the suction port forming wall portion to the opposed wall portion.

Abstract: A volute shaped pump casing (1) for a centrifugal pump includes a chamber for housing at least one impeller (4) mounted on a shaft (2) for rotating the impeller around an axis of rotation (2a), a volute shaped chamber which forms a flow channel divided into a first volute (5.1) and a second volute (5.2), and a first channel (6.1) and a second channel (6.2) connected to the first and the second volute respectively. The first channel is also called long channel and the second channel is also called short channel. In the volute shaped pump casing (1), the first or long channel (6.1) is axially displaced with respect to the second or short channel (6.2) and/or with respect to the second volute (5.2).

Abstract: A centrifugal-type blower includes a shaft, a fan, and a casing. The casing includes an inlet, an air passage, and a side wall part. A first distance from a center of the fan to the wall part at an inlet side end portion in a radial direction of the fan gradually increases from a volute start part to a volute end part. A second distance from the center to the wall part at any position thereof from an intermediate position to a counter-inlet side end portion in the radial direction is larger than the first distance within a first range. The second distance gradually decreases from the volute start part to a predetermined position. The second distance has the same length as the first distance within a second range.

Abstract: An enclosure includes a back plate and a heat dissipating device. The back plate includes a plurality of locking members extending from the back plate. The heat dissipating device attached to the back plate and includes a plurality of fixing members engaging with the locking members.

Abstract: A non-positive-displacement machine (10), particularly a turbomachine for producing a mass flow, having a central housing part (11) inside which a turbine shaft is mounted. A turbine housing is mounted on the central housing part (11) on a turbine side and a compressor housing is mounted on the central housing part (11) on a compressor side. The spiral channels (17, 18) required for the compressor side and for the turbine side can be arranged in a partial area inside the covers (15, 16) and at least in one partial area inside the central housing part (11). This permits the contours, which are required for the spiral channels (17, 18) and which are geometrically complex, to be constructed in the central housing part (11).

Abstract: A fan includes an impeller and a housing. The housing includes a base portion and a sidewall portion disposed around and connected with the base portion. A plurality of first recesses are disposed at a connection between the base portion and the sidewall portion, and a rib is disposed between every two adjacent first recesses. The impeller includes a hub having a base portion and a wall portion disposed around and connected with the base portion, and a plurality of blades disposed on a circumference of an outer wall of the wall portion. A plurality of third recesses are disposed at a connection between the base portion of the hub and the wall portion, and a rib is disposed between every two adjacent third recesses. The recesses can prevent the impeller and the housing from the defects and shape deformation caused by injection molding during manufacturing processes, and enhance the structural strength.

Abstract: A turbine housing for a supercharger, includes an inlet opening, a turbine seat and a race extending from the inlet opening to the turbine seat, the race including a first spiral chamber (7) which mouth into the turbine seat and a second spiral chamber (8) which mouth into the turbine seat. Both the first spiral chamber (7) and the second spiral chamber (8) mouth in a first angular segment (?) of the turbine seat, the axial height of the mouth into the turbine seat of the second spiral chamber (8) in the first angular segment (?) is bigger in the end of the first angular segment (?) than in the beginning thereof seen in a flow direction (F), and in that the A/R-ratio of the first spiral chamber (7) is smaller than the common A/R-ratio of the first spiral chamber (7) and the second spiral chamber (8).

Abstract: A turbo machine (1) comprises a casing (2) and a first volute tongue (12), an impeller (3) with at least one vane (4), and a flow splitter plate (5) comprising a second volute tongue (13) for splitting a flow of a fluidic medium produced by the impeller. The flow splitter plate comprises at least one opening (10) connecting the first surface (8) and the second, opposite surface (9) so as to reduce or eliminate vibrations.

Abstract: A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

Abstract: A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

Abstract: A blower drawing air into the air path and discharging air to the discharge duct, including: a frame forming an outer shell; a fan driven by a motor and having a fan outlet, inside the frame; a duct connection part having a duct connection opening, connected to the discharge duct, outside the frame; and an in-frame blow-out part connecting the duct connection part with the fan outlet, inside the frame. The cross-section shape of the air path changes continuously and smoothly at the in-frame blow-out part and the duct connection part, from the fan outlet to the duct connection opening.

Abstract: A centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a permanent magnet provided in one surface of the impeller, a permanent magnet provided in an inner wall of the blood chamber, a permanent magnet provided in the other surface of the impeller, and a magnetic material and a coil provided in a motor chamber for driving the impeller to rotate via a diaphragm. Grooves for hydrodynamic bearing are formed in the diaphragm facing the impeller, and in the inner wall of the blood chamber, respectively. As a result, the impeller can be smoothly activated to drive by controlling a coil current.

Abstract: An air handler blower assembly includes a blower housing containing a centrifugal fan and a motor mounted on the blower housing and connected to the fan. The blower housing has opposite first and second air inlet openings that are coaxial with the fan, and the first inlet opening is larger than the second inlet opening. The motor is mounted on the blower housing with the motor extending axially through the first inlet opening into the blower housing and into the interior of the fan. The positioning of the motor inside the blower housing and inside the fan reduces the overall axial dimension of the blower assembly. The larger first air inlet opening reduces the losses associated with placing the motor in the first air inlet opening while keeping the second air inlet opening at a smaller size than the first air inlet opening avoids creating buffeting noise and a power/efficiency loss from occurring.

Abstract: The flow path of exhaust gas to the turbine wheel (70) of a turbocharger is influenced by relative motion between two rings of vanes, at least one of which being provided on a vane ring. The outer ring of vanes contains a plurality of vanes (92, 122), the inner ring of vanes contains a plurality of vanes (93, 121), and the inner and outer vanes in registry forming a single generic vane shape. The aerodynamic effect of relative displacement of the outer ring of vanes to the inner ring of vanes produces a modulate-able control of exhaust flow to the turbine wheel.

Abstract: In a flow guide structure for an exhaust gas turbine of a turbocharger including a support ring and a contoured casing which are disposed at a distance from one another by means of spacer elements and between which adjustable guide vanes are rotatably supported, the contoured casing being disposed in a spiral housing so as to be axially displaceable therein and delimiting a lateral outer contour of a rotor with clearance, while the support ring is centered and mounted relative to a support housing of the exhaust gas turbine by means of an annular flexible support element, the support element comprises a component with a uniform wall thickness.

Abstract: A twin scroll exhaust gas turbocharger for an internal-combustion engine, includes a turbine housing and a first and a second gas inlet port separated from one another by the turbine housing. The inlet ports lead into a first and a second spiral duct, respectively, which extend radially on the outside around an exhaust gas turbine rotatable about an axis. The gas inlet ports are arranged at least in sections parallel to one another in the turbine housing and radially with respect to the axis of rotation in a mutually spaced manner. The first spiral duct, which connects to the first gas inlet port arranged closer to the axis of rotation, extends up to 180° around the exhaust gas turbine. The second spiral duct, which connects to the second gas inlet port farther away from the axis of rotation, extends up to 180° around the remaining circumference of the exhaust gas turbine. As a result, thermal stress to the turbine housing is significantly reduced.

Abstract: An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing.

Abstract: An impeller plate of an impeller of a centrifugal pump, particularly a channel impeller pump, for pumping liquids with solid or gaseous admixtures, is provided with at least one wide vane that is displaced toward the impeller drive by a distance D so that the impeller chamber is enlarged by a rearward portion thereof. In addition, the impeller comprises at least one auxiliary vane having a center width at between 25%-75% of the width of the wide vane. This arrangement improves particularly the gas transporting ability of the pump.

Abstract: Provided is a turbo compressor configured to compress a gas in cooperation with a rotatable impeller and a diffuser formed around the impeller and to discharge the compressed gas to the outside thereof through a scroll chamber communicating with the diffuser, the turbo compressor including: an impeller casing which is formed by integrally molding a body portion surrounding the impeller and forming a part of a the scroll chamber and a partition plate provided at the rear surface side of the impeller; and a shroud cover which is provided at the inside of the body portion to surround the impeller and forming the scroll chamber in cooperation with the body portion.

Abstract: A centrifugal fan includes a motor having an impeller and a housing for accommodating the motor. The housing has a sidewall surrounding an outer circumference of the impeller. An air inlet is formed in the housing and opposed to a center portion of the impeller. An air outlet is formed in the sidewall of the housing and opposed to an outer surface of the impeller. The housing includes a housing body and a housing cover. The housing body has a bottom with the motor secured thereon. The housing cover, formed by a pressed metal member, has an upper part and a cover sidewall extending from the upper part toward the bottom of the housing body and forming at least a part of the sidewall of the housing.

Abstract: The blower includes a fan blade 5 extending in a centrifugal direction from an outer peripheral surface of a hub part having a cylindrically-shaped outer peripheral surface, a driving part for supporting and driving the fan blade 5, and a fan frame 2a which supports the driving part and has an intake port 4, and is characterized in that the fan frame 2a includes legs 9a to 9c for connecting a drive side inner peripheral end of the intake port 4 to an outer peripheral end, and a side of the outer peripheral end of the fan frame 2a is provided with slits 10 for extending the legs 9a to 9c.

Abstract: A centrifugal fan includes a housing and an impeller. The housing includes a base plate, a side plate extending upwardly from a periphery of the base plate and a concave portion depressed downwardly from a central portion of the base plate. The concave portion includes a bottom wall spaced from the base plate and a side wall interconnects with the base plate. An air inlet is defined in the bottom wall. The impeller includes a hub and a plurality of blades extending radially from the hub. The impeller is rotatably arranged on the bottom wall of the concave portion. A bottom face of each of the blades extends into the concave portion.

Abstract: An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing whereby the blower housing is used in a compact enclosure for residential use. This is accomplished by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing.

Abstract: Numerous cavities exist in a turbocharger for reasons of construction. If such cavities are filled with particles, inexpensive particle vibration dampers can be realized. Moreover, advantages with regard to additional containment security result in the case of possible bursting of the compressor wheel, and also with regard to noise suppression.

Abstract: An air distribution blower housing for a low profile air handler such as a residential furnace is designed with a volute-shaped outer wall that has an exponentially increasing expansion angle in the direction of air flow through the blower housing for at least a portion of the volute-shaped outer wall length. This results in the blower housing having an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet.

Abstract: A centrifugal blower having a fan including a blade. A scroll casing houses the fan and has a first axial wall portion, a second axial wall portion, and a side wall extending between the first and second axial wall portions. The scroll casing includes a suction port in the first axial wall portion. The scroll casing also defines a scroll start portion and a scroll finish portion. The scroll casing has a scroll radius measured transverse to the rotation axis that changes from the scroll start portion to the scroll finish portion. Also, a maximum radius of the scroll radius is closer to the second axial wall portion than the first axial wall portion.

Abstract: A pump casing for a centrifugal pump, which comprises an inlet opening, a discharge outlet, and a transition surface extending between an inner peripheral surface of the main pumping chamber and an inner peripheral surface of the discharge outlet, the transition surface arranged for separating an in use exit flow of material in the discharge outlet from an in use recircula tion flow of material in the main pumping chamber. The transition surface has a cutwater having a profiled section which comprises a protrusion which extends irregularly from an otherwise generally rounded arched or U-shaped transition surface and is configured such that, in use, the velocity and/or turbulence resulting from the in use flow of the material being pumped in the main pumping chamber is reduced.

Abstract: In a scroll fluid machine where an orbiting scroll fixed to a pivot shaft eccentrically revolves, a fixed portion is provided on a bottom of a casing, and a swing column is provided between the fixed portion and the orbiting scroll or between the fixed portion and the pivot shaft. The fixed portion withstands the thrust load of the orbiting scroll, which has been transferred by the swing column.

Abstract: A modular multistage pump assembly includes a volute having a suction side and a pressure side, a pump stack having at least one stage, and a modular flange coupled to each of the volute and the pump stack.

Abstract: A power generating device for use with a plumbing fixture includes: a volute configured to receive water from a water supply pipe; a stator having a plurality of blades positioned around a circumference thereof positioned within the volute; a rotor positioned within the stator; and a generator coupled to the rotor. The volute directs substantially all of the water received from the water supply pipe in a circumferential direction through the plurality of blades of the stator to the rotor, thereby causing the rotor to rotate.

Abstract: A blower assembly for use with an HVAC module is provided. The blower assembly includes a scroll or volute shaped housing having an air inlet in a wall of the housing for receiving air to be blown by an impeller, and an air outlet from which the blown air passes from the housing. A blower wheel is secured to a rotatable motor-driven shaft extending along a central axis of the air inlet. At least one venture is provided adjacent to the air inlet of the housing, the at least one venturi connectable to an aspirator that is in fluid communication with a sensor unit. Wherein, during operation, the blower wheel pulls air both through the air inlet to the housing and through the at least one venturi.

Abstract: Provided is a fan of a microwave oven. The fan, discharging air in two directions, cools a plurality of components. Thus, the components are cooled with more simple configuration.

Abstract: A structure of a radial turbine scroll avoids a gas flow heading from a radially outer side toward a radially inner side in the vicinity of a tongue portion so as to restrain turbine performance from deteriorating and also reduces, to a maximum, thermal stress caused by the formation of the tongue portion.

Abstract: A compressor comprises an impeller wheel mounted within a housing defining an inlet and an outlet. The wheel has a plurality of vanes and is rotatable about an axis. The housing has an inner wall defining a surface located in close proximity to radially outer edges of the impeller vanes which sweep across said surface as the impeller wheel rotates about its axis. The inlet comprises inner and outer tubular walls extending away from the impeller wheel in an upstream direction and defining between them gas flow passage. A bleed passage between the gas flow passage and the impeller wheel is selectively opened and closed by movement of a sliding sleeve in a helical direction.

Abstract: A centrifugal fan having a sound reduction effect for noises in a wide frequency range is provided. The centrifugal fan comprises a motor to which an impeller is connected, a casing which surrounds the impeller and which has a bell-mouth-like suction port, and a bell-mouth-like orifice which has a suction port being concentric with the suction port of the casing and having a diameter as large as that of the suction port of the casing, in an outer shell, providing a plurality of protrusions in a resonant space surrounded by the orifice, the casing, and the outer shell, and providing depressions which are formed so as to be interposed between the protrusions.

Abstract: A two-volute low pressure turbocharger is provided with a VGT mechanism in one turbine volute only.

Abstract: The present invention relates to a base design of cooling structure, which includes a base, and a shaft tube disposed on the base to support a spindle of an impeller to rotate therein. The base has at least a groove and the groove is located beyond an outer diameter; the groove design can be employed to effectively prevent the issue of contraction stress caused by difference of cooling time of temperature and to prevent a slanted shaft tube for supporting a stable operation of the spindle of the impeller, thereby avoiding the resulting run-out and noise, making vibration and noise test values of the product comply with a standard value range, reducing the defective rate of the product and prolonging the product lifespan.

Abstract: Centrifugal impeller (14) of centrifugal air blower (1) has main plate (15); a plurality of blades (18); ring-shaped plate (20); and a cylindrical wall (22). The blades (18) are circumferentially disposed on the side of the outer periphery of front side (17) of main plate (15). Ring-shaped plate (20) is attached to tip sections (19) of blades (18). Cylindrical wall (22) is disposed on the back side (21) of the main plate (15) so as to be concentric therewith. The structure above provides centrifugal impeller (14) and centrifugal air blower (1) with improved air-blow efficiency and noise-reduced operations.

Abstract: To provide a scroll structure of a rotary machine and a rotary machine in which it is possible to achieve an improvement in reliability and functionality of a rotary machine such as a turbine and to achieve a reduction in size of the rotary machine and the scroll structure. Provided are a casing (21) that entirely covers an area surrounding an annular channel extending in a circular shape about a rotational axis in a rotating portion of a rotary machine and a cylindrical channel extending from the annular channel at the rotational axis side and extending towards the rotating portion; and a fitting portion (23A) that supports the casing (21) with respect to a support portion accommodating the casing (21) so as to enable expansion and contraction in a radial direction centered on the rotational axis.

Abstract: A pressure vessel including a lid, wherein the lid is fixed to a corresponding lid receptacle, wherein the lid has a first bearing surface that extends in the circumferential direction and interacts in a sealing manner with a second bearing surface on the pressure vessel, wherein fixing elements are provided for fixing the lid to the pressure vessel. The fixing elements are wedge-shaped, rest on an abutment surface of the pressure vessel and on a contact surface of the lid such that, when the fixing element is moved in a direction that causes a wider section of the wedge shape to be located between the abutment surface and the contact surface, the bearing surfaces are brought closer together or braced against each other.

Abstract: A hand-guided power tool has a housing having a first housing part and a second housing part. A grip unit has at least one handle for guiding the power tool and forms the first housing part. A motor unit is arranged in the second housing part and has a drive motor. The grip unit and the motor unit are connected to one another by at least one antivibration element. The at least one antivibration element has a first end secured to the first housing part and a second end secured to the second housing part. The first housing part has at least one receptacle extending from an exterior of the first housing part into a housing interior of the housing. The at least one antivibration element has a longitudinal extension and is surrounded over at least a portion of the longitudinal extension by the at least one receptacle.

Abstract: The present relates to a centrifugal impeller. According to the invention, the centrifugal impeller includes: a base plate 11 that has a rotating shaft bracket at the center portion where a rotary shaft is fitted, and of which the surface radially formed from the rotary shaft socket is sloped downward in a straight line or at a predetermined radius of curvature to maintain an obtuse angle with respect to the rotary shaft; a plurality of blades 13 that is circumferentially arranged on the upper surface of the base plate 11; and a scroll casing 15 that is disposed on the fronts of the blades 13, has a suction hole 15? at the center portion to suck fluid, and forms an enlarged channel 17 through which the fluid flows, between the base plate 11 and the scroll casing 15 by being sloped downward from the suction hole 15? toward the radial end.

Abstract: A centrifugal fan comprises a casing (2) and an impeller (5) that is mounted in the casing (2) and turns about a defined axis of rotation (X). The casing (2) has an axial inlet opening, through which air is drawn in, and a tangential air discharge opening (7). The tangential discharge opening (7) is delimited by a first edge (8) that is substantially parallel with the axis of rotation (X) and is located in the vicinity of the impeller (5), by a second edge (9) opposite the first edge (8) and spaced from the impeller (5) and by two lateral edges (10), each joining the first edge (8) to the second edge (9). The centrifugal fan also comprises an appendage (12) located in the vicinity of the tangential discharge opening (7), delimited by the first edge (8) and having a convex surface (16) inside the casing (2) and a connecting surface (15) between the convex surface (16) and the first stage (8).

Abstract: A housing for a blower, fan or pump or turbine, the housing adapted to be associated with a rotor adapted in use to cooperate with fluid flowing through the housing wherein the housing comprises a shroud for guiding the fluid moving in association with the rotor, the rotor having at least one vane adapted to cooperate with the fluid to drive or to be driven by the fluid, wherein the shroud is configured to promote vortical flow of the fluid through the housing.

Abstract: A ventilator (100) includes a frame (10), a volute (20) mounted in the frame (10), a motor bracket (60) mounted in the opening of the volute (20) and a motor (30) fitted in the motor bracket (60). The frame (10) is made of metal material. The character of the ventilator is in that the motor bracket (60) is made of metal material. Since the metal motor bracket has favorable performances of heat radiation and rigidity, the ventilator (100) has better security and stability.

Abstract: A centrifugal pump is provided having a volute casing having a discharge conduit, an impeller provided in the volute casing, and a suction sideliner enclosing the impeller in the volute casing, the suction sideliner being at least partially covered with sintered tungsten carbide tiles. In one embodiment, the impellor has a central hub, a plurality of vanes spacedly attached to the hub, and at least one side plate attached to the vanes, whereby each vane is individually wear protected prior to attaching each vane to the hub.

Abstract: A centrifugal pump includes a pump unit and a drive unit. The pump unit includes a volute and an impeller disposed in the volute. The drive unit includes a stator and a rotor having a shaft. The volute includes an inlet, an outlet and a chamber in communication with the inlet and outlet. The shaft of the rotor extends into the chamber of the volute and the impeller is attached to and driven by the shaft. The volute further includes a transition part connected between the outlet and the chamber and communicating the outlet with the chamber. The axis of the transition part is angled to the axis of the outlet. The transition part is configured to improve the effect of fluid turbulence to thereby reduce noise, especially in the air-water stage.

Abstract: Turbulence of exhaust gas in a turbine impeller outlet is reduced with a simple structure to improve efficiency of a turbine. A sealing device 25 for prevention of exhaust gas in a scroll passage 8 from leaking via a gap 19 to a turbine impeller 4 is arranged upstream, in a travel direction of the exhaust gas, of through-holes 24 via which the vane shafts 16b extend through a rear exhaust introduction wall 11, whereby pressure P2 in a gap 19 communicating with the through-holes 24 of the rear wall 11 is kept lower than pressure P1 in an exhaust nozzle 9 so as to displace nozzle vanes 15 to the rear wall 11.

Abstract: A housing for a radial compressor is comprised of at least two housing parts manufactured of plastic material for receiving a compressor wheel and for forming a spiral-shaped compressor passage, wherein into the housing between compressor wheel receptacle and compressor passage an annular space is introduced that annularly surrounds the compressor wheel and into which a stabilization element is introduced.

Abstract: A blower system comprising a housing and a fan assembly. The housing defines a housing chamber, at least one inlet opening, a primary outlet opening, and a secondary outlet opening. The fan assembly is mounted within the housing chamber. Operation of the fan assembly draws air into the housing chamber through the at least one inlet opening and forces air out of the housing chamber through at least one of the primary outlet opening and the secondary outlet opening.