Abstract: A serial fan assembly includes a first fan, a second fan and at least one air-guiding structure. The first and second fans are arranged in serial, and the air-guiding structure is disposed therebetween, for guiding an airflow to follow a direction parallel to an axial direction of the serial fan assembly when the airflow exits from the first fan and enters the second fan, thereby increasing air volume and air pressure of the serial fan assembly and reducing noise during operation. Also, power loss is compensated, and flexibility of assembly and fabrication are improved.

Abstract: An impeller (1) according to the present invention has a disk-like main plate (10), a blade (20) joined to the main plate, and a side plate (30) having a suction port. A boss hole (12) is formed in a central portion of the main plate for attaching a boss which engages with a pump shaft to the boss hole. A step portion (14) is formed around the boss hole, which is formed in the main plate, by drawing.

Abstract: An apparatus and a method for a versatile, multi-stage, centrifugal fluids-processing device adaptable to efficiently mixing, blending, emulsifying, deagglomerating or homogenizing fluids. The device comprises a centrifugal-pump-type mechanism comprising an electric motor, an intake screen, an elongate metal body, a central drive shaft extending from the motor to the discharge end of the device. Attached internally to the drive shaft is one impellor per stage, which by rotation of the motor, imparts kinetic energy to the fluid being processed. The fluid discharged from the impellors passes through separate conduits and opposing nozzles into opposite ends of a chamber having the internal shape of an oblate-spheroid with internally-ribbed ceramic walls.

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: A compound turbocharger is provided, including at least one housing. A first turbocharger having an outer shaft is disposed within the housing, and a second turbocharger is provided having an inner shaft co-axial with and extending within the outer shaft. At least one displacement limiter is disposed at a selected position along the length of the outer shaft. A method of reducing vibrational amplitude in an inner shaft of a coaxial shaft assembly is further provided, including the step of operably positioning at least one displacement limiter at a selected position along a length of the outer shaft.

Abstract: The present invention relates to an improved turbine structure for use in a gas turbine engine. The turbine structure includes a one-piece drum rotor and a plurality of turbine blades attached to the one-piece drum rotor. The one-piece drum rotor includes integrally formed, welded disks for supporting the plurality of turbine blades. A method for installing the turbine structure is also described.

Abstract: A preloaded spring assembly is provided in a recess in each shroud in axial opposition to an aft facing sealing surface of a turbine nozzle retaining ring. Each spring assembly includes a spring, preferably a bellows type spring, with a plate mounted on one side and a sealing surface on the side of the plate remote from the spring. The sealing surface may be an abradable coating or a honeycomb seal. The seal assembly is maintained preloaded by a wrap which upon reaching turbine operating temperature disintegrates, enabling the spring to load the sealing surface against the retaining ring surface to prevent or minimize air leakage from outside the nozzle retainer ring into the hot gas path.

Abstract: A system and method is provided for pumping fluid. A pump incorporates composite components that provide a high degree of formability while maintaining wear resistance for use in potentially abrasive environments. The composite components may comprise one or more impellers and/or one or more diffusers.

Abstract: A high pressure centrifugal blower having vertically split casing and aluminum or steel impellers mounted on a common shaft housed within the casing, and at least two oil-enclosing bearing housings to rotatably support the rotors, where an integral gearbox is formed as part of the blower casing so as to increase the impeller rotational speed to achieve higher pressure, and axial impeller eye seals are utilized to reduce the clearance and enhance reliability for higher pressure applications.

Abstract: A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.

Abstract: A pump includes a body, an actuating shaft, on which at least a first impeller and a second impeller are axially mounted, a fluid intake duct and a fluid delivery duct. The pump further includes front and rear chambers, first and second volutes, first and second discharge orifices and a channel inside the body for throughflow of fluid to the second impeller.

Abstract: An integrated pumping system for use in environments, such as subterranean environments, to move a desired fluid from one location to another. The integrated pumping system comprises one or more stages that each have an integrated pump and motor. A controller may be utilized to individually control the one or more integrated pumps and motors.

Abstract: According to the invention, the stator is made by radially assembling together at least two stator sectors (21, 22) about a rotor (18). Each stator sector (21, 22) comprises a peripheral shell sector (24, 25) provided with internal annular grooves (24a-24j) in which stator vane sectors (26a-26j) are engaged individually. This facilitates assembly and provision of subassemblies constituting the turbomolecular pump.

Abstract: A centrifugal pump pumps well fluid with a high gaseous content by utilizing an impeller design for use in gaseous liquids. The impeller has high discharge angles and large balance holes. The impeller has short and long vanes alternating with each other. The shorter vanes have a leading surface that is concave in shape. In one design, the longer vanes have a radially outward portion of a leading surface that is concave in shape. The radially outward portion of the longer vanes of this design has substantially the same radius of curvature as the shorter vanes. The radially inward portion of the leading edge of the longer vanes can be concave or convex in shape.

Abstract: A small, lightweight and inexpensive thin-form centrifugal fan having a first moving blade; a second moving blade; and a stationary blade disposed between the first moving blade and the second moving blade and directing gas taken in by rotation of the first moving blade to the second moving blade. The first and second moving blades are formed such that the rigidity of their central portions is smaller than the rigidity of their outer perimeter areas.

Abstract: A centrifugal compressor includes first and second impellers coupled to opposite ends of a drive shaft. Each impeller includes a hub with a plurality of blades on a front face. The blades compress a fluid, while forcing the fluid off an outer periphery of the hub. At least one of the impellers includes a plurality of uniformly shaped pressure attenuating grooves provided around its outer periphery. The pressure attenuating grooves reduce an axial load applied to the impeller, and act to balance the overall resultant axial load applied to the drive shaft by the two impellers, thereby reducing wear on thrust bearings engaging the rotating drive shaft.

Abstract: A centrifugal supercharger includes a gear-type transmission for drivingly connecting the impeller to the engine. The transmission includes an impeller shaft supporting the impeller and being fixed relative to one of the gears of the transmission. The preferred impeller shaft and gear fixed thereto are integrally formed of cast iron so as to dampen propagation of sound waves to the impeller, thereby reducing the amplification of transmission noise by the impeller. Depending upon the desired horsepower gains provided by the supercharger, the impeller shaft preferably has a minimum shaft diameter.

Abstract: A centrifugal supercharger includes a case presenting a compressor chamber and a transmission chamber. An impeller in the compressor chamber is mounted to a shaft that extends into the transmission chamber. The impeller shaft is drivingly connected to a power input shaft by intermeshing gears provided on the shafts. A portion of the transmission chamber defines a fluid reservoir in which lubrication fluid is held. The intermeshing gears, as well as the bearing assemblies supporting the shafts, are located outside the fluid reservoir portion of the transmission chamber. A rotatable fluid-propelling element partly submerged in the lubrication fluid contained within the reservoir portion ensures that sufficient but not excessive lubrication fluid is supplied to the intermeshing gears and the bearing assemblies.

Abstract: A motor with a cooling mean is provided which includes a rotation axis, a rotator assembly fixed to the rotation axis, a stator assembly that surrounds the rotator assembly, a bearing attached to both ends of the rotation axis to support the rotation axis, an axial-flow fan or a hybrid fan used as a cooling means places between each bearing and the rotator assembly to cool the stator assembly and the rotator assembly, and an endshield attached to both ends of a housing to protect the structure. The motor with a cooling means further includes a plurality of air intakes; a plurality of through holes attached to the rotator assembly to circulate the air, and a plurality of concave grooves or cooling pins formed in a surface of the endshield to enlarge the cooling area to discharge the heat in the inside of the motor. Thereby, the cooling efficiency is substantially improved, the operation of the motor becomes more stable, and the life span of the motor is increased.

Abstract: In a multi-stage side channel pump, the efficiency can be optimized in that the geometry of each subsequent stage (14) is adapted to the specific volume of the medium at the outlet of the preceding stage (12) by determining the dimensions of the impeller diameter (D) and of the flow channel diameter (d). The stage pressure is the same for both stages (12, 14). The impeller geometry of the next stage (14) is determined by means of the volume ratio of the preceding stage (12) to the next stage (14), assuming geometric similarity.

Abstract: A method of configuring a compressor in a turbocharger for use in an internal combustion engine is provided with the steps of: providing a multi-stage compressor including a first compressor wheel carried by a shaft, an axially extending first inlet and a radially extending first outlet associated with the first compressor wheel, a second compressor wheel carried by the shaft, an axially extending second inlet and a radially extending second outlet associated with the second compressor wheel; fluidly interconnecting in series the first outlet with the second inlet using an interstage duct; selecting a total pressure ratio to be provided by the multi-stage compressor; ascertaining a first pressure ratio provided by the first compressor wheel at an operating speed; sizing the second compressor wheel to provide a second pressure ratio, dependent upon the total pressure ratio and the first pressure ratio; determining a stress on the second compressor wheel at the operating speed; determining a temperature within

Abstract: By changing a vane height to produce different vanes from master vanes, different impellers are produced, and therefore there can be obtained an inexpensive and high-reliability multistage centrifugal compressor and an impellers therefor. An impeller for multistage centrifugal compressor, which is to be mounted on a rotary shaft, comprises a plurality of vanes disposed between a disk and a shroud and separated from one another equiangularly. By changing the vanes of the impeller only in height without changing the configuration, vanes can be obtained, and then a different impeller comprising the disk, a shroud and vanes is also obtained. Since a whole of the vane has a configuration identical to a part of the vane, these vane can be produced by a single pair of the pressing dies.

Abstract: A high-pressure fan comprising a blade wheel (3, 4), a fan housing (5, 6) surrounding the blade wheel and an electric motor (1) to operate the blade wheel. To eliminate the problems related to the mounting of the blade wheel, the blade wheel (3, 4) at least mainly consists of light carbon fiber based composite material and is directly mounted on the shaft (2) of the electric motor.

Abstract: A gas compression device for compressing and separating a gas including a liquid phase and a gas phase, includes at least one inlet pipe for the wet gas, at least one compressed gas outlet pipe, a shaft and several compression stages. The device includes at least one compression stage suited for separation of the liquid phase and of the gas phase, one or more pipes designed for discharge of an essentially liquid phase resulting at least partly from the separation performed in a suitable compression stage. The device can be used for wet gas transportation in the petroleum field.

Abstract: A rotodynamic pump comprises a centrifugal impeller (11) provided within a volute body (7) and an emulsifier (17) provided in the region of an inlet of the volute body and rotatable with the centrifugal impeller for emulsifying material to be pumped.

Abstract: One or more improved pump impellers are provided and are rotationally supported in a pump having one or more stages. The improved impeller comprises a fluid induction core of flow passages spiraling axially about the impellers rotational axis and a stack of circular disks extending radially and concentrically from the induction core. The stack of disks is preferably a frusto-conical stack with the disks at the downstream end of the impeller having a lesser radial extent than do the upstream disks so that incrementally less fluid issues from each successive radial flow passage between adjacent disks thereby reducing head loss in the issuing viscous fluid flow and increasing pumping efficiency. Increased pump efficiency permits one to provide a conical pump housing profile about each impeller which corresponds with the conical stack, thereby diminishing the fluid flow area and increasing the discharge pressure and flow capacity of each pumping stage.

Abstract: The fluid transfer device comprises a stator assembly incorporating a plurality of return channels which pick up the high speed fluid flow leaving a centrifugal impeller of one stage of the turbomachine for the purpose of rectifying, slowing down, and conveying said flow to the inlet of another centrifugal impeller of an adjacent stage of the turbomachine. Each return channel is constituted by a continuous shaped individual tubular element. A first continuous return channel is defined by a set of varying sections defined by parameters and extending normally to a mean line situated in a predefined plane (P1P2P3) containing the axis of the machine. The mean line has a rectilinear first portion, a curved second portion forming a circular arc of radius Rco2, and a rectilinear third portion. The various return channels are identical and can be derived one from another by rotation about the axis of the turbomachine.