Abstract: A pumping module is positionable within a pump housing for pumping fluid into a wellbore. The pumping module includes a cylindrical housing with an inlet end and an outlet end, an inlet cap positioned on the inlet end of the cylindrical housing and including an inlet formed through the inlet cap, and an outlet cap positioned on the outlet end of the cylindrical housing and including an outlet formed through the outlet cap. A shaft is rotatable with respect to the cylindrical housing, and a rotor is positioned within the cylindrical housing and rotatable by the shaft to push fluid through the cylindrical housing.

Abstract: A centrifugal blower apparatus includes a scroll-shaped housing with first and second air inlets which open to a blower chamber that is in fluid communication with an air outlet. The blower includes a motor to drive impellers, wherein the motor is secured to a frame coupled within the housing in a manner to substantially enhance aerodynamic performance of the blower.

Abstract: A method of monitoring the condition of a volute casing of a centrifugal pump, the method includes determining, in a wall of the volute casing, at least one point, which, in view of the material forming the volute casing, is critical to wear, providing, from outside the volute casing, a blind hole in the wall of the volute casing at the at least one point, the blind hole having a depth, receiving information from the blind hole, and taking predetermined actions to replace the volute casing with a new casing after the information indicates the opening of the blind hole into the interior of the volute casing.

Abstract: Disclosed is a multi-volute sirocco fan (multiblade fan). The present invention relates to a multi-volute sirocco fan configured to discharge fluid into several directions while using one motor and one fan. The sirocco fan according to the present invention comprises: a driving motor; a fan connected to a rotation shaft of the driving motor to thus be rotated therewith, the fan having a plurality of vanes arranged and installed in a cylindrical shape along the circumferential direction thereof; and at least two stacked volutes in the center of which the fan is arranged and installed and which guide the fluid while the cross-sectional area formed by the upper and lower surfaces, side surfaces thereof and the outer circumferential surface of the fan is linearly increased.

Abstract: This electric motor includes a frame defining an internal volume and comprising a rotor and a stator, a primary cooling circuit comprising at least one primary conduit and in fluidic communication with the outside of the frame for circulating a gas stemming from the outside of the frame in the internal volume of the frame, a secondary cooling circuit extending in the internal volume of the frame and isolated from the outside of the frame, said secondary cooling circuit comprising at least one first cooling channel going through the rotor and at least one second cooling channel going through the stator, wherein it comprises at least one heat insulation channel interposed between the primary conduit of the primary cooling circuit and the second cooling channel of the secondary cooling circuit.

Abstract: Embodiments of the invention are directed to a rotor for a molten metal pump and a molten metal pump including the rotor. The rotor has a main body and a top comprised of a material that is at least twice as hard as the main body. The top, among other things, may form a first portion of each rotor blade wherein the first portion directs molten metal into a pump chamber or other structure in which the rotor is mounted.

Abstract: A bladeless fan assembly is provided which includes a housing having an air inlet and an air outlet. A blower is located within the housing, and includes a motor for driving an air stream between the air inlet and air outlet of the housing. A directional scoop is affixed to the housing at the air outlet. The directional scoop including a first end, connected to the housing at the air inlet, and a second open end opposite the first end. The first end and second open end of the directional scoop define a longitudinal length “L” of the directional scoop having a longitudinal axis “X.” The directional scoop is arcuate is shape, being curved along the longitudinal axis between the first and the second open end, and about the longitudinal axis to define an open channel along the length of the directional scoop.

Abstract: According to another embodiment, a molten metal impeller comprised of a generally cylindrical body including a plurality of passages extending from a top surface to a side wall and a cap member secured to a top surface of the body. The cap member is shaped cooperatively to overlay the cylindrical body. The cap member includes a first side seated on the top surface and a second opposed side. The top surface includes one of a notch or a protrusion and the first side of the cap member includes one of a notch or a protrusion oriented to mate with the notch or protrusion of the body.

Abstract: A heat-dissipation fan including a base and an impeller disposed at the base, wherein the impeller includes a plurality of first blades, a plurality of second blades and a plurality of connection ribs. Each of the first blades and each of the second blades are arranged alternately. Each of the connection ribs comprises a first edge, a second edge and a third edge. The first edge is connected with the first blade, the second edge is connected with the second blade, the third edge is connected with the first edge and the second edge, and the third edge and the second blade are spaced apart to form a first vent. The first edge comprises a first length, the second edge comprises a second length, and the first length is larger than the second length.

Abstract: A fan module includes a housing and an impeller. The housing has an axial air inlet, a radial air inlet and at least one radial air outlet. The impeller is rotatably disposed in the housing and has a first air-guiding blade, a second air-guiding blade and a partitioning member. The partitioning member separates an interior space of the housing into a first air channel and a second air channel. The first air-guiding blade is located in the first air channel, and the second air-guiding blade is located in the second air channel.

Abstract: An impeller for a centrifugal fan includes a hub, impeller blades, and struts for supporting the blades in a circumferential array spaced apart from the hub. The number of struts can equal the number of blades, each strut extended from the hub to support two blades while each blade is supported by one strut nearer to its leading edge and another strut nearer to its trailing edge. Another arrangement features two struts per blade, with one of the struts coupled to the hub and a given blade, and the other strut coupled between the given blade and an adjacent blade. The struts are recessed inwardly from the leading and trailing edges to promote smoother air flow. The blades and struts are provided with aerodynamic thickness profiles to further improve air flow.

Abstract: A turbomachine that includes a radial-flow impeller and one or more of a variety of features that enhance the performance of machinery in which the turbomachine is used. For example, when the turbomachine is used in a dynamometer, the features enhance the useful shaft horsepower range of the dynamometer. One of the features is a variable-restriction intake that allows for adjusting flow rate to the impeller. Other features include a unique impeller shroud and a shroud guide each movable relative to the impeller. Yet another feature is an exhaust diffuser that facilitates an increase in the range of shaft power and the reduction of deleterious vibration and noise. The turbomachine can also include a unique impeller blade configuration that cooperates with the adjustable intake and the exhaust diffuser to enhance flow through the turbomachine.

Abstract: A wind power generator apparatus includes a housing (10) having a chamber (11), a wind generator set (20) in the chamber (11) and a wind collector (30) coupled to the wind generator set (20). The wind generator set (20) includes a base (21) fixed in the housing (10), a generator (22) mounted on the base (21) and a blade wheel (23) coupled to the generator (22). The wind generator set (20) can be installed in a vehicle (50) for generating electric power during driving. The power generated by the wind generator set (20) can be stored or used to charge the vehicle (50).

Abstract: A steam turbine and a start-up system for a steam turbine are disclosed comprising: a plurality of stages, a steam path through the plurality of stages, an inlet port for introducing steam to a first stage, an exhaust port at a last stage for allowing exhaust to exit the steam turbine, an admission port for allowing steam to enter the steam path at a location downstream from the inlet port, and a ventilator port for allowing steam to exit the steam path, the ventilator port located upstream of the admission port to create a reverse flow of steam towards the ventilator port from the admission port.

Abstract: A centrifugal fan includes an impeller and a housing receiving the impeller therein. The impeller includes a hub and blades extending radially from the hub. The housing includes a bottom wall, a sidewall extending upwardly from the bottom wall and a bracket for supporting the impeller thereon. The bottom wall defines an air inlet therein. A plurality of protruding posts extend downwardly from a bottom surface of the bottom wall around the air inlet. Each of the protruding posts defines a screw hole therein. The bracket is located in the air inlet. The bracket defines a plurality of through holes corresponding to the protruding posts respectively. The protruding posts of the bottom wall are respectively inserted into the through holes of the bracket. A plurality of bolts are respectively screwed into the screw holes of the protruding posts to connect the bracket and the bottom wall together.

Abstract: An exhaust gas assembly includes an exhaust gas manifold which is connected with an exhaust gas inlet of a manifold and an adjusting member arranged in the manifold. The adjusting member is configured to supply exhaust gas to a low pressure connection and/or a high-pressure connection of the manifold, wherein on the high-pressure side a high-pressure turbine housing is connected to the manifold and on the low pressure side a low pressure turbine housing is connected to the manifold. A connecting channel extends through the manifold and connects a high-pressure exhaust gas outlet) of the high-pressure turbine housing with a low pressure exhaust inlet) of the low pressure turbine housing.

Abstract: A centrifugal fan includes a top cover plate, a bottom plate, a sidewall and an impeller. The sidewall is defined with an air outlet. The impeller includes a hub and a plurality of blades extending radially outwardly from the hub. An air passage channel is defined between outmost free ends of the blades and an inner surface of the sidewall. A tongue is provided near the air outlet and protrudes inwardly and laterally from the inner surface of the sidewall towards the outmost free ends of the blades. The tongue has an outer surface facing the outmost free ends of the blades. A plurality of grooves is defined in the outer surface along a lengthwise direction of the tongue.

Abstract: The present invention relates to a blower for vehicles, which includes guide walls formed on a bypass passageway formed between a scroll case and an outer case to send the indoor air and the outdoor air to a lower suction opening of the scroll case, thereby reducing suction noise by guiding a uniform flow of air introduced into the lower suction opening, preventing deformation of the outer case, and preventing a droop of the air filter by supporting a lower portion of an air filter when an intake duct injection-molded in a vertically parted mold is applied thereto.

Abstract: A centrifugal pump mounted in an external housing. The pump has a split housing containing an impeller with outwardly extending vanes that is mounted on a drive shaft. The drive shaft at one end is mounted to a sealed bearing within the external housing and at the other end to a drive.

Abstract: A dual-inlet turbocharger system for internal combustion engine includes a single-shaft turbocharger with a dual-inlet compressor section. An air router provides a bifurcated air supply for the dual-inlet compressor section, and also provides a bifurcated source of charge air for the engine's cylinders in the case in which the present turbocharger system is applied to a V-block engine.

Abstract: A centrifugal blower (10) includes a casing (12) and a rotor (14) rotatable disposed in the casing. The casing includes a base plate (121), a sidewall (122) extending from the base plate and a cover (123) covering the sidewall. The sidewall is a multilayer structure and includes a first section (128a) and a second section (128c). A distance between a central axis (A) of the rotor and an inner surface of the second section is greater than that between the central axis of the rotor and an inner surface of the first section. The first section is located below a mother board (20) and the second section sits on a top surface of the motherboard when the centrifugal blower is mounted to the mother board.

Abstract: A fluid-type absorption dynamometer that includes a rotary impeller and one or more of a variety of features that enhance the shaft-horsepower range for which the dynamometer can be used. One of these features is a variable restriction intake that allows a user to adjust the flow of fluid to the impeller. Other features are a unique impeller shroud and shroud guide that are each movable relative to the impeller to allow a user to adjust flow characteristics at the exhaust and blade regions of the impeller. Yet another feature is a set of exhaust baffles that facilitate an increase in the range of shaft power ratings of the device and the reduction of deleterious vibration and noise. The dynamometer also includes impeller blades having a unique configuration.

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 impeller vane assembly for blending liquids with solid particulate matter in which a center drive shaft extends through a housing having a solid particle inlet and a liquid inlet together with an outlet, and upper and lower impeller vanes are aligned respectively with the particle inlet and liquid inlet to cause intermixing of the solids and liquids by counterflow of the liquid into the upper impeller region, the upper and lower vanes being separated by a common divider plate, the upper vanes being radially split and lower vanes having outer split tips, the vanes being operative to balance the point at which the solids and liquid are intermixed between the solid particle inlet and annular space surrounding the impeller. In one embodiment, inner concentric expeller blades are employed with the upper impeller vanes to accelerate the flow of solid particles.

Abstract: According to the present invention, along the right and left sides of a rotary shaft, flat faces that serve as sealing faces are formed at the circumferential edges, on the suction chamber side, of semicircular division plates, which define suction chambers and a discharge chamber of a volute casing that is divided into two segments. Two disc plates are prepared as pressure test tools, and are positioned on the right and left sides of the rotary shaft so that they contact the flat faces that are formed around the circumferential edges of the division plates near the suction chambers. The two disc plates are then securely connected to a member in the axial direction. In addition, a bolt fastening structure, which is axially tightened by the member that connects the disc plates axially, is provided in at least one axial direction.

Abstract: An electronic assembly (1) includes a top cover (21), a bottom cover (22) and a thermal module (10). The thermal module includes a centrifugal blower (14) and a fin assembly (12). The blower includes a top lid (142) defining a first air inlet (146) therein, a bottom plate (147) defining a second air inlet (150) therein, and a sidewall (148). An air outlet (149) is defined in the blower in front of the sidewall. A first distance (H1) formed between the top cover and the top lid is greater than a second distance (H2) formed between the bottom cover and the bottom plate. A left edge (154) of the second air inlet adjacent to the air outlet offsets a distance from a corresponding left edge (155) of the first air inlet inwardly toward a rotation axis (A) of an impeller (143) of the blower.

Abstract: An electronic assembly includes an enclosure including a top cover and a bottom cover, and a thermal module arranged between the top cover and the bottom cover of the enclosure. The thermal module includes a centrifugal blower and a fin assembly arranged in an air outlet of the centrifugal blower. The centrifugal blower includes a top lid defining a first air inlet therein, a bottom plate defining a second air inlet therein, a sidewall disposed between the top lid and the bottom plate, with the air outlet defined in the sidewall, and a rotor disposed in an inner space formed between the top lid, the bottom plate and the sidewall. The bottom plate is separated by a distance from the bottom cover of the enclosure. The bottom plate defines an indent therein so as to widen the distance.

Abstract: A stable portable air moving device capable of generating an air stream elevated above a support surface allowing the air stream to be directed as desired by the user is provided. The device includes an air blower assembly located within an elongate housing generating an exhaust air stream that exits the elongate housing at an elevation above the air blower assembly.

Abstract: A compact, single shaft gas turbine gas generator uses a high pressure ratio dual-entry single stage centrifugal compressor, can combustors, and a radial inflow turbine with the compressor configured to achieve an overall pressure ratio of about 12:1 or greater and Mach Numbers less than or equal to about 1.4. The radial inflow turbine is configured to provide an expansion ratio of about 4:1 to about 5:1, to provide partially expanded combustion gases to a free-power turbine or an expansion nozzle, in a work-producing engine configuration. A ball bearing assembly in front of the compressor is used in conjunction with a thrust piston assembly to take up turbine thrust load, while a radial tilt pad bearing assembly is used in front of the turbine. A collector with scroll-shaped sector portions collects compressed air from an annular vaned diffuser, and respective crossover ducts channel the collected diffused compressed air from each sector portion to a plenum feeding can combustors.

Abstract: The present invention is a centrifugal pump that pumps high-viscosity liquids, slurries, and solids-containing liquids. The pump has a housing, a chamber formed within the housing, a first discoidal member positioned in the chamber, a second discoidal member positioned in that chamber, connecting rods connecting a periphery of the first discoidal member to a periphery of the second discoidal member, and a drive for rotating the first discoidal member and the second discoidal member positioned in the chamber. The first discoidal member is either a recessed impeller or half-regular closed centrifugal impeller. The second discoidal member is a recessed impeller, a disc impeller, or a half-regular closed centrifugal impeller. The second discoidal member has a hole in the center.

Abstract: A centrifugal pump is provided for use with fluids, gases, and solids in connection with a drive shaft and a motor. The pump has a housing and at least a 30 degree sloped impeller mounted on the shaft within the housing. The housing has opposing inlet means on each side of the impeller and a discharge outlet. The impeller can be constructed as split through its center with an associated split housing or being an integral part.

Abstract: An air intake with at least one inlet port area and one outlet port area, in which there is arranged at least one structure which may be flowed through and around, comprises an opening and modifies the clear cross-section only slightly, in particular serving as a fresh air/recirculated air housing for a motor vehicle heating, ventilation and/or air-conditioning system.

Abstract: A fan motor having a small thickness and its impeller's blades formed to have a longer length in the diametrical direction than a width in the axial direction. Since the blade of the fan motor has a tooth structure or chamfers at its edge end in the diametrical direction, turbulence is forcibly evoked in an airflow to promote the turbulent diffusion, thereby suppressing the trailing vortex and reducing the aerodynamic noises, and thus the ventilation efficiency is improved.

Abstract: An impeller vane assembly for blending liquids with solid particulate matter in which a center drive shaft extends through a housing having a solid particle inlet and a liquid inlet together with an outlet, and upper and lower impeller vanes are aligned respectively with the particle inlet and liquid inlet to cause intermixing of the solids and liquids by counterflow of the liquid into the upper impeller region, the upper and lower vanes being separated by a common divider plate, and the vanes are characterized by being curved in the direction of rotation of the impeller and having outer radially extending tips which terminate at the outer peripheral edge of the common divider plate, the vanes being operative to balance the point at which the solids and liquid are intermixed between the solid particle inlet and annular space surrounding the impeller.

Abstract: A centrifugal pump has a pump base with inlet inducer openings that receive molten metal into an impeller chamber. An impeller structure in the impeller chamber passes the metal in a radial direction through an outlet inducer opening into a volute passage for discharge into the pool of metal in which the pump is located.

Abstract: A heat-dissipating fan has two intakes and can be used for mounting on a heat-generating element. The heat-dissipating fan mainly includes a base, a blade assembly, an outer casing and a cover. The base has an accommodating trough for accommodating the blade assembly. The bottom of the accommodating trough is provided with a plurality of first intakes. Further, the outer casing is provided above the base and correspondingly combined with the base. The center of the outer casing is provided with a second intake. Finally, the cover is provided under the base and correspondingly connected to the bottom of the base. With the above arrangement, when two adjacent heat-dissipating fans operate at the same time, with the closing action of the cover, the interference in the air-extracting action between the facing intakes of the two adjacent heat-dissipating fans can be reduced to keep the heat-dissipating effect of the fan.

Abstract: A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.

Abstract: In a turbo-molecular pump with a high vacuum-side induction area and of a rotational symmetrical arrangement, comprising a compressor turbine including a rotor and a stator tube having axially alternately tightly arranged rotor blade rings and stator vane rings with oppositely oriented blade and vane surfaces, a pre-vacuum chamber with a gas guide structure for the connection of a pre-pumping system, a drive module and a bearing unit, the turbo-molecular pump has a center area with a central coaxial open space extending from an ambient end to the high vacuum-side induction area and the open space is closed at its end adjacent the ambient end thereof by a flange in a vacuum-tight manner or is connected to a vacuum recipient, and the high-vacuum end of this space is separated from a pre-vacuum space.

Abstract: A fan motor with an increased amount of air drawn in toward fan blades so as to obtain a desirable airflow characteristic. A fan motor includes a rotor and a plurality of fan blades provided radially therefrom. Each fan blade is provided with an air intake part on a proximal side and a radial part on a distal side, including a first front surface on the former side and a second front surface on the latter side. The first and second front surfaces have different curvatures. Thus, air F can be impelled out toward a perimetric direction, and at the same time the intake of air toward the fan blades is promoted. Accordingly, the amount of air to be drawn in toward the fan blades is increased, thereby obtaining desirable airflow characteristic.

Abstract: A blower having an enclosure having side walls defining an internal chamber, an open end comprising a first inlet, a second inlet and an outlet. A flow separator plate extends across the internal chamber between the side walls defining a first scroll duct and a second scroll duct. The first scroll duct is in flow communication with the first inlet and the outlet, while the second scroll duct is in flow communication with the second inlet and the outlet. A blower wheel is rotatably mounted in the enclosure through an opening in the separator plate having a first wheel portion disposed in the first scroll duct and a second wheel portion disposed in the second scroll duct.

Abstract: A method and apparatus for blending liquids with solid particulate matter in which a center drive shaft extends through a housing having a solid particle inlet and a liquid inlet together with an outlet, and upper and lower impeller vanes are aligned respectively with the particle inlet and liquid inlet to cause intermixing of the solids and liquids by counterflow of the liquid into the upper impeller region. In one embodiment, expeller blades are employed in inner concentric relation to the upper impeller vanes to accelerate the flow of solid particles into the upper impeller region, and baffle plates or deflector members are employed above and below the upper and lower impellers to prevent any leakage of liquid into the center of the impeller. In preferred and alternate forms, the impeller vanes are sized to balance the point at which the solids and liquid are intermixed.

Abstract: A blower having a plurality of impellers is described. The blower has two driving devices and two impellers respectively mounted on the two driving devices. The blades of the two impellers, which are radially or axially disposed, are overlapped so as to enhance the heat-dissipating efficiency of the blower.

Abstract: A centrifugal pump is provided for use with fluids, gases, and solids in connection with a drive shaft and a motor. The pump has a housing and a sloped impeller mounted on the shaft within the housing. The housing has opposing inlets on each side of the impeller and a discharge outlet. The impeller can be constructed as split through its center with an associated split housing or being an integral part.

Abstract: The invention relates to a feed pump (2) that is configured as a side-channel pump with a plurality of identically designed feed chambers (6, 7) with outlet channels (22, 23) that are disposed opposite one another, thereby eliminating the radial forces acting upon the impeller (4) of the feed pump (2). The feed pump (2) according to the invention is especially wear-free and has a very high degree of efficiency.

Abstract: A high-pressure ratio turbocharger of this invention has a two-stage compressor section comprising a first-stage compressor impeller rotatably disposed in a first compressor housing, and a second-stage compressor impeller rotatably disposed in a second-stage compressor housing. The first and second stage compressor impellers are attached to a common shaft, and are positioned within respective compressor housing in a direction facing away from one another. A portion of the second-stage compressor housing is formed from a compressor backplate attached to a turbocharger center housing. A scroll seal is disposed between the first and second-stage compressor housings, and is interposed between the impellers to separate outlet air flow between each respective first and second-stage compressor chamber.

Abstract: A dual fan blower module of the present invention includes a housing defining a central motor compartment and first and second scroll chambers. The scroll chambers are axially aligned with and located on opposite sides of the motor compartment. A motor is mounted within the motor compartment and has first and second shaft ends extending axially therefrom. The first shaft end extends into the first scroll chamber and the second shaft end extends into the second scroll chamber. A first fan is mounted onto the first shaft end within the first scroll chamber for rotational movement within the first scroll chamber and a second fan is mounted onto the second shaft end within the second scroll chamber for rotational movement within the second scroll chamber. Each of the first and second scroll chambers includes an expansion channel extending axially inward toward the motor.

Abstract: A production tool for use in heavy oil production is provided. Operating to provide for better inflow of oil and sand to a bottom hole rotating pump, the production tool prevents sand up conditions and keeps the well cellar and the walls of the casing clean to ensure longer periods between workovers. The production tool has a cylindrical member with at least one helical fin extending substantially to the inner radius of the casing, and a gear reducer which drives the cylindrical member at a reduced rotation from input from the rotor of the bottom hole rotating pump. The rotational motion of the cylindrical member in conjunction with the sense of the helical fin cause bore effluence to move to the intake of the rotating pump, effecting constant inflow.

Abstract: A high-pressure ratio turbocharger of this invention has a two-stage compressor section comprising a first-stage compressor impeller rotatably disposed in a first compressor housing, and a second-stage compressor impeller rotatably disposed in a second compressor housing. The first and second stage compressor impellers are attached to a common shaft, and are positioned within respective compressor housing in a direction facing away from one another. A portion of the second compressor housing is formed from a compressor backplate attached to a turbocharger center housing. A scroll seal is disposed between the first and second compressor housings, and is interposed between the impellers to separate outlet air flow between each respective first and second compressor chamber.

Abstract: Comprises a double, asymmetric impeller (2) attached to a rotary shaft (3), a fixed housing (4) that surrounds said double impeller (2), a fluid inlet (5) in axial direction and a fluid outlet (6) in radial direction with respect to the double impeller (2), with said double impeller (2) defining a front side (7) which receives the entry of fluid and a rear side (8) close to the sealing zone (9) of the shaft (3) with the fixed housing (4). Said system is characterised in that said double impeller (2) is provided with means (10) for taking the fluid from its front side (7) to its rear side (8), so that when the double impeller (2) rotates there arises a control of the pressure in the sealing zone (9), thus permitting balancing of the stresses on the impeller and optimisation of the sealing system.

Abstract: This invention relates to configuration of at least two exhaust gas turbochargers on an internal combustion engine with a plurality of cylinders, in particular in a motor vehicle, in which the two turbine housings are connected to the exhaust gas system of the internal combustion engine and are immediately adjacent to each other and one turbine is always connected to one compressor by means of a drive shaft, the drive shafts being rotatably mounted in corresponding bearing housings. In order to prepare a design which is advantageous from the viewpoint of structure and production technology, it is proposed that the turbine housings are oriented such that the drive shafts be positioned at least approximately in alignment with each other and that the bearing housings be connected to the turbine housings on both sides.