Abstract: A reaction turbine operates on the heat released from the condensation of steam, combined with inherent steam pressure and temperature heads. A series of rotors, each containing multiple curved internal channels, provide compressive boosts between successive stages, while avoiding excessive self-compression. Compressive effects and shock waves generated within these channels provide high levels of condensation, thereby releasing immense amounts of heat. The resulting hot vapor and condensate droplets are then ejected tangentially at the periphery of the rotors to generate thrust. The exhaust steam from the last stage is then compressed and returned to the engine inlet to be mixed with the incoming fresh steam, thereby efficiently completing the system cycle without the need of large cooling towers for condensation.

Abstract: A compressor system includes a compressor, and an electric motor driving a shaft to drive the compressor. An inlet is connected to a source of air to be compressed. The inlet is connected to the compressor. A fan impeller is mounted in the inlet upstream of the compressor. A cooling air exit communicates with the inlet, and upstream of the compressor. The cooling air exit is connected to the motor to provide cooling air to the motor. A dual compressor system is also disclosed.

Abstract: A fan body includes a fixture, a first fan blade set, and a second fan blade set. The fixture is located at a middle of the fan body and configured to be connected to a power mechanism that drives the fan body to rotate. A first fan blade of the first fan blade set is connected to the fixture. A second fan blade of the second fan blade set is connected to neighboring first fan blades of the first fan blade set.

Abstract: An electrical apparatus includes a housing, a blower, and a duct. The housing covers a plurality of electrical components. The blower blows air. The duct guides the air that has cooled one of the plurality of electrical components to another one of the plurality of electrical components. The duct includes a fire wall.

Abstract: A high-lift shielded permanent magnet multistage water pump includes a pump shell, a motor assembly and an impeller. The motor assembly includes a motor barrel, a stator, a rotor and a rotor shaft. The pump shell is sleeved on an outside of motor barrel. An upper and a lower connection base for fixing the motor barrel is provided in the pump shell. A waterway cavity is formed between the pump shell and motor barrel. An upper and a lower impeller cavities are respectively formed at an upper and a lower ends of the pump shell. The lower impeller cavity, water passing cavity and upper impeller cavity are in sequential fluid communication. Both ends of the rotor shaft with an axel provided on pass through the upper and the lower connection bases respectively. The impeller is a multistage structure and mounted on the axle at both ends respectively.

Abstract: A humidification and air cleaning apparatus is provided, in which a first sweep angle and a second sweep angle are formed at diffuser blades, and an included angle is formed between the first sweep angle and the second sweep angle, such that a phase difference is formed in air passing through the diffuser blades, and thus, air flow noise may be reduced.

Abstract: An impeller of a rotating machine according to at least one embodiment includes: a disc; a cover disposed on an opposite side of a radial passage from the disc in an axial direction; and a blade disposed between the disc and the cover. A back surface of the disc has a recess extending in a circumferential direction in a radial range where the blade is disposed.

Abstract: A motor assembly includes a rolling bearing installed on a rotation shaft between an impeller and a rotor to support a first support of the rotation shaft, and a motor housing having a stator. The motor housing has a gas bearing bracket for accommodating a second support of the rotation shaft disposed at a side opposite to the first support with respect to the rotor. The motor assembly includes a gas bearing assembly in the gas bearing bracket to support rotation of the second support of the rotation shaft. The gas bearing assembly includes a gas bearing for surrounding the second support. The gas bearing is spaced apart from the second support of the rotation shaft to define a gap therebetween when the rotation shaft rotates. The gas bearing assembly includes an elastic member interposed between the gas bearing bracket and the gas bearing to elastically support the gas bearing.

Abstract: A compliant keyway for an electric submersible pump (ESP) bearing sleeve is described. A compliant keyway system for an ESP bearing sleeve includes the ESP bearing sleeve coupled to an ESP shaft by an elongate key such that the ESP bearing sleeve is rotatable with the ESP shaft, the ESP bearing sleeve inward of a non-rotatable bushing, the elongate key seated on a first elongate side within a shaft keyway extending longitudinally along the ESP shaft, and the elongate key seated on a second elongate side within a sleeve keyway, an inner diameter of the ESP bearing sleeve including the sleeve keyway extending along a length of the bearing sleeve, the sleeve keyway including a keyway means for compliance with deflection of the elongate key seated within the sleeve keyway, and the elongate key transferring torque between the ESP shaft and the ESP bearing sleeve.

Abstract: A centrifugal compressor comprises a rotation shaft, an impeller, and a casing. The impeller has a hub and a plurality of blades. The casing has an opposite surface facing a back surface of the hub, and a projection projecting from the opposite surface toward the impeller. The hub is provided with an accommodation space that accommodates the projection. The accommodation space includes a through hole penetrating the hub from the back surface toward an external radial surface. The through hole opens while avoiding the blades.

Abstract: A fan includes a hub and a blade assembly. The hub has a central portion and an extension portion. The extension portion is extended outwardly from a peripheral edge of the central portion. The blade assembly includes a plurality of blades. Each blade has a leading edge, each of the leading edges is an end point of each blade that is most close to the central portion. The blades are disposed around the hub. At least a part of the leading edges of the blades are connected to the extension portion, and distances between a center of the central portion and the leading edges of at least two blades are different. Therefore, the factors of fan and the quality of voice could be enhanced, and the multi-frequencies noise could be avoided during operation.

Abstract: The present invention provides a centrifugal multistage compressor adapted to inhibit corrosion of an intermediate stage labyrinth. More particularly, the present invention provides a centrifugal multistage compressor adapted to inhibit carbon dioxide corrosion of the intermediate stage labyrinth.

Abstract: An impeller for pumping fluid that comprises discharge flow paths that allow high pressure liquid to be used to flush out low pressure gas that can accumulate within the internal structure of the impeller. The impeller comprises transition regions, vanes, and at least one discharge flow path. The vanes are rotational about a central axis. The transition regions and the plurality of vanes have a high pressure flow path and a low pressure flow path. The at least one discharge flow path is in fluid communication with a section of the low pressure flow path of at least one of the transition region(s) and the vane(s).

Abstract: A rotary machine includes: a casing; a rotor that includes a rotatable rotary shaft located inside the casing, and a plurality of stages of impellers fixed to an outer periphery of the rotary shaft; a diaphragm group including diaphragms that are respectively provided in the plurality of stages of the impellers; gas flow paths provided respectively corresponding to the impellers and through which process gas to be compressed flows; and a discharge volute connected to the gas flow paths. The discharge volute is provided to expand inward in an axis line direction of the casing.

Abstract: A rotary machine includes a casing part having a return bend part configured to reverse a flow direction of a working fluid flowing from an impeller. The casing part includes a diaphragm having a curved flow path formation surface which forms a curved surface of the return bend part and an outer casing configured to cover the diaphragm and having a concave part which is recessed from an inner circumferential surface. The outer casing has an outer flow path formation surface which forms a part of the return bend part further outward in the radial direction than the curved flow path formation surface. The diaphragm has a convex part which protrudes from an outer circumferential surface outward in the radial direction to be engaged with the concave part. A surface of the convex part in the axial direction extends from the curved flow path formation surface.

Abstract: The present invention provides a centrifugal compressor (1) including: a first casing (19); a second casing (20) which is disposed on a downstream side of the first casing (19) and has an outer diameter larger than an outer diameter of the first casing; a first impeller (3a) which is disposed on a radially inner side of the first casing; a first return flow path (29a) which is disposed on a radially inner side of the first casing; a second impeller (3b) which is disposed on a radially inner side of the second casing and connected to a downstream side of the first return flow path (29a); an intermediate suction flow path (10) which is disposed on the radially inner side of the second casing and additionally supplies the fluid to a flow path between the first return flow path (29a) and the second impeller (3b); and a second return flow path (29b) which is disposed on the radially inner side of the second casing (20), wherein an outer diameter of the intermediate suction flow path (10) and an outer diameter of t

Abstract: The described embodiments relate to improving efficiency of a low-profile cooling fan. In one embodiment, an impeller of the cooling fan includes a shroud which covers a central portion of the impeller, thereby allowing a central inlet portion of the blades to have an increased fan blade height when compared to a cooling fan constrained by minimum part tolerances between the fan blades and a portion of the fan housing. In some embodiments, the impeller includes splitter blades that can improve performance of the low-profile cooling fan.

Abstract: A compressor system includes a first compressor assembly including at least one first impeller. The first compressor assembly defines at least one first volute configured to receive a first working fluid from the at least one first impeller at a first pressure and a first temperature. The compressor system also includes a second compressor assembly rotatably coupled to the first compressor assembly. The second compressor assembly includes at least one second impeller rotatably coupled to the at least one first impeller. The second compressor assembly defines at least one second volute configured to receive a second working fluid from the at least one second impeller at a second pressure. Further, at least one of the following conditions exist, i.e., the first pressure is different from the second pressure and the first temperature is different from the second temperature.

Abstract: A bushing anti-rotation system and apparatus. A bushing anti-rotation system includes an impeller and diffuser stage including a rotatable shaft extending longitudinally through the stage, the diffuser having an inner diameter defining a bore, a bearing set including a bushing pressed into the inner diameter, and a rotatable sleeve inward of the bushing, and means for wedging the bushing against the inner diameter of the diffuser, wherein the means for wedging provides a mechanical lock against rotation of the bushing. The means for wedging the bushing against the diffuser includes one of a key wedged between an eccentric cavity in the diffuser and a notch in the bushing, a pin protruding from the diffuser against a flattened portion of the bushing, a square-shaped bushing secured into a square-shaped bore, a bent retaining ring having a bent end that wedges against a diffuser groove wall, or a combination thereof.

Abstract: An opposing impeller arrangement, for using in an opposed impeller pump, features a combination of a stage 1 impeller arrangement and a stage 2 impeller arrangement having opposing impellers and different impeller and wear ring arrangements. The stage 1 impeller arrangement may include a stage 1 impeller and a stage 1 wear ring, and be configured to receive an input fluid flow and a pump stage 1 fluid flow. The stage 2 impeller arrangement may include a stage 2 impeller and a stage 2 wear ring configured to receive the pump stage 1 fluid flow and provide a pump stage 2 fluid flow, and may also include a stage 2 wear ring undercut configured between the stage 2 impeller and the stage 2 wear ring to offset generated axial thrust in the opposing impeller pump, based upon the different impeller and wear ring arrangements.

Abstract: A centrifugal pump (1) includes several pump stages, which are arranged axially between a head part (4) and a foot part (2). The pump stages are surrounded peripherally by an outer casing (3). An axial end of the outer casing (3) is fastened on the head part (4), and the other axial end on the foot part (2). A mechanical connection between the head part (4) and the foot part (2) is formed by the outer casing (3).

Abstract: A press-fit thrust bearing system and apparatus. A press-fit thrust bearing for an electric submersible pump includes a protruding band extending around a midsection of a bushing, the protruding band extending inward towards a drive shaft, outward towards a diffuser, or both. When extending outwardly, the band is press-fit into the diffuser to prevent dislodgment of the bushing. A non-rotating guide sleeve extends around the bushing above the protruding band, the guide sleeve interlocking with the protruding band to prevent rotation of the bushing. The guide sleeve includes a projection, the protruding band has a channel and the projection mates with the channel to form the interlock. A pair of flanged, rotatable bearing sleeves extend inwards of the single bushing and are keyed to the drive shaft. The top and bottom faces of the bushing serve as thrust handling surfaces.

Abstract: A centrifugal fluid machine includes a rotor, a low pressure compression unit provided on one side in the axial direction of the rotor, a high pressure compression unit provided on the other side in the axial direction of the rotor, a partition wall 13 that separates the low and high pressure compression units, and a high pressure-side discharge passage 54 formed on the side of the high pressure compression unit of the partition wall 13, extending in the radial direction of the rotor, and provided along the partition wall 13, wherein the partition wall 13 has a wall body 71, a passage deformation suppression member 72 that is provided between the wall body 71 and the high pressure-side discharge passage 54 and can deform the high pressure-side discharge passage 54, and an biasing mechanism 73 that is provided between the wall body 71 and the passage deformation suppression member 72.

Abstract: The centrifugal pump (1) includes several pump stages which are arranged axially between a head part (4) and a foot part (2). An outer casing (3) peripherally surrounds the pump stages. An axial end of the outer casing (3) is fastened on the head part and the other axial end of the outer casing (3) is fastened on the foot part. A mechanical connection between the head part (4) and the foot part (2) is formed by the outer casing (3).

Abstract: A multistage centrifugal compressor includes a rotating shaft; a first impeller and a second impeller fixed to the rotating shaft; and a casing configured to surround the rotating shaft and the first and second impellers, that forms a first diffuser channel allowing the flowing through of a fluid which is discharged from the first impeller, that forms a first return channel, that forms a second diffuser channel allowing the flowing through of the fluid which is discharged from the second impeller, that forms a second return channel, wherein the first impeller is disposed adjacent to the second impeller in the axial direction of the rotating shaft, in the first diffuser channel, a vaneless diffuser is disposed, and in the second diffuser channel, a vaned diffuser having multiple vanes is disposed.

Abstract: A turbine-generator device for use in electricity generation using heat from industrial processes, renewable energy sources and other sources. The generator may be cooled by introducing into the gap between the rotor and stator liquid that is vaporized or atomized prior to introduction, which liquid is condensed from gases exhausted from the turbine. The turbine has a universal design and so may be relatively easily modified for use in connection with generators having a rated power output in the range of 50 KW to 5 MW. Such modifications are achieved, in part, through use of a modular turbine cartridge built up of discrete rotor and stator plates sized for the desired application with turbine brush seals chosen to accommodate radial rotor movements from the supported generator. The cartridge may be installed and removed from the turbine relatively easily for maintenance or rebuilding. The rotor housing is designed to be relatively easily machined to dimensions that meet desired operating parameters.

Abstract: A gas turbine engine has a turbine section, and a housing enclosing the turbine section, with a mount structure secured to the housing for mounting and including internal flow passages for delivering air to remote locations.

Abstract: The described embodiments relate to improving efficiency of a low-profile cooling fan. In one embodiment, an impeller of the cooling fan includes a shroud which covers a central portion of the impeller, thereby allowing a central inlet portion of the blades to have an increased fan blade height when compared to a cooling fan constrained by minimum part tolerances between the fan blades and a portion of the fan housing. In some embodiments, the impeller includes splitter blades that can improve performance of the low-profile cooling fan.

Abstract: A turbine-pump system bowl assembly for use with flowing liquid in a liquid conduit has an impeller subassembly that includes multiple axially abutting impeller members.

Abstract: A casing is provided having a longitudinal axis of a turbomachine, the axis extending along a rotor. The casing includes at least one jacket part extending along the longitudinal axis and at least one end-face cover. The cover is surrounded by the jacket part at least with a part of the axial extension of the cover. In order to reduce the need for radial clearance, without compromising the availability or safety of the operation of the machine, the cover has radial clearance with respect to the jacket part and at least two separate guide elements of the cover are provided on the jacket part in two different circumferential positions with respect to the longitudinal axis. The respective guide elements are designed such that they block a respective movement of the cover in the circumferential direction at least unidirectionally.

Abstract: A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form said oilfield fluid.

Abstract: A multi-inlet vacuum pump has a first pump device (10) and a second pump device (12). The first pump device (10) includes a first rotor element (18) having a plurality of first rotor discs (20, 21) arranged consecutively in the delivery direction (36). The second rotor disc includes a second rotor element (26) having a plurality of second rotor discs (28) arranged consecutively in the delivery direction (36). A first fluid flow (34) is suctioned through a main inlet (32) by the first pump device (10) and delivered in the direction of the second pump device (12). A second fluid flow (40) is suctioned through an intermediate inlet (38) by the second pump device and delivered in the direction of a pump outlet. The diameter of the last rotor disc (21) of the first pump (10) substantially corresponds to the diameter of the first rotor (28) of the second pump device (12).

Abstract: The present invention relates to a multistage centrifugal pump design, which has the diffusers, impellors, and a shaft, inserted within a high pressure housing, such that this assembly is fully enclosed within the housing, and the housing is of sufficient strength to be suitable for safe pressure containment of the fluids being pumped. This invention describes the technical details used to reconfigure the multistage centrifugal pump design to increase the discharge pressure capabilities higher than the 6,000 psig of current designs.

Abstract: A centrifugal pump stage with increased compressive load capacity is provided. In an implementation, a centrifugal pump stage includes a diffuser with outside wall capable of supporting increased axial forces. A mating surface of the outer wall can support axial forces generated by a stack of subsequent pump stages across the entire thickness of the outer wall. The diffuser can be a two-piece assembly including a load bearing module and a flow diffusing module. The load bearing module may be a cylinder of strong tubular alloy while the flow diffusing module can be separately cast in a manner that improves hydraulic efficiency. Various means for radially positioning the pump stages relieve the load bearing module from the task of aligning additional pump stages. A single rigid tube may also be used as the load bearing module for multiple pump stages. The tube may be made with a thin wall to increase pump volume.

Abstract: A double casing type pump and a performance adjusting method allow for adjustment of the performance of the pump, especially the head of the pump, without large-scale work or component disassembly. The pump includes impellers fixed to a rotation shaft, an inner casing shrouding the impellers, an outer casing shrouding the inner casing and having a suction opening and a discharge opening. A space is formed between the inner and outer casings that communicates with the discharge opening. A bypass hole connects the space to the working fluid passage in the inner casing and has a throat diameter adjusting member. A plurality of throat diameter adjusting members are prepared in advance, each member having different throat area. One of the throat diameter adjusting members is selected so that the performance of the pump remains within a predetermined range.

Abstract: A centrifugal pump has a gas accumulation reduction system to reduce the risk of gas locking caused by the accumulation of gas at the inlet of the impeller. The gas accumulation reduction system includes: (i) one or more diffuser ports extending through the hub of a diffuser; and (ii) one or more recirculation passages extending through the hub of an impeller. The recirculation passages are in fluid communication with the one or more diffuser ports to permit the recirculation of a portion of pumped fluid through the stage. Additionally, a centrifugal pump that includes at least one turbomachinery stage. The stage includes a rotatable impeller that has an impeller hub with a centrally disposed eye and a plurality of impeller vanes. The impeller is variously configured to encourage mixing of two-phase fluids at the eye of the impeller hub.

Abstract: A multi-stage centrifugal fan is provided and includes first and second stages of a rotor having substantially axially aligned rotor vanes formed to impart energy to a fluid moving in an outward radial direction when the first and second stages of the rotor rotate about a centerline and a stator having stator vanes radially interposed between and substantially axially aligned with the first and second stage rotor vanes.

Abstract: Various embodiments include a turbomachine exhaust diffuser. In some embodiments, the turbomachine diffuser includes an inlet, an outlet opposing the inlet along a primary axis of the turbomachine diffuser, and a diffuser region between the inlet and the outlet. The diffuser region can include: a radially outer wall and a radially inner wall opposing the radially outer wall. The radially inner wall can include: a first section including a substantially uniform slope, and a second section continuous with the first section, the second section having a non-uniform slope.

Abstract: A stage of a steam turbine, having a rotor extending along a longitudinal axis, has a fixed stage and a movable stage arranged successively along a flow channel for feeding steam in a direction substantially parallel to the longitudinal axis; the fixed stage has an inner ring coaxial with the longitudinal axis, and a number of stator blades arranged radially about the inner ring; each stator blade is fixed to an annular top portion of the inner ring, which has a top surface facing the flow channel and crosswise to the longitudinal axis; and the movable stage has a number of rotor blades arranged radially about the rotor and fixed to the rotor.

Abstract: An electrical submersible pumping system having a pump, a motor, a shaft connecting the pump and motor. Coaxially stacked rotating impellers and stationary diffusers are coaxially housed within the pump. Radial ports are formed in a hub of the diffusers that direct fluid pressurized by an impeller to a cavity formed on the shroud of the impeller. Axial ports are formed in the shrouds of the impellers that direct fluid from the cavity to a fluid flow passage within the impeller. Strategic placement and sizing of the radial and axial ports balances thrust forces exerted onto the impeller.

Abstract: A 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 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 rotor assembly for a gas turbine engine includes a rotor airfoil and a first rotor disk. The rotor airfoil extends along a radial axis. The first rotor disk includes an outer rim, a bore and a web extending between the outer rim and the bore. The first rotor disk is axially offset from the radial axis of the rotor airfoil.

Abstract: The invention relates to a rotor wheel constructed of sheet metal for a centrifugal pump, particularly a multi-stage centrifugal pump, with means for fastening to the drive shaft of an electric motor, wherein the rotor wheel has a central coaxial opening in which a sleeve is fastened coaxially, wherein the sleeve projects out of the rotor wheel on at least one side of the rotor wheel, and wherein the sleeve has, in its inner wall, projecting, axially parallel ridges for fastening into axially parallel notches or grooves of the motor drive shaft.

Abstract: A centrifugal pumping system having a stack of impellers and diffusers for pressurizing fluid. The impellers are rotated by a motor for pressurizing and lifting fluid from within a wellbore. Undulating profiles are provided on leading edges of the impellers for inducing turbulence in the fluid being pumped. Increasing turbulence better homogenizes the fluid, so that choked flow is avoided when different density components are present in the fluid. Reducing the possibility of choked flow increases pump efficiency and lift capacity.

Abstract: A fluid pump comprising a pump body, a low pressure impeller, a high pressure impeller, impeller seal means separating the inlet side of the low pressure impeller from its pressure side, a pump priming system, and a pump priming conduit provided through the low pressure impeller radially inboard of the impeller seal means. The high pressure impeller is preferably provided within a cavity, defined by an impeller recess and a cover plate. A wear ring is preferably provided between the low pressure impeller and the inboard end of the cover plate. The pump priming conduit preferably comprises: first and second axial bores through the pump body; a radial bore and two axial holes through the cover plate; an axial hole through the rear wear ring; a cavity between the wear ring and the low pressure impeller; and axial holes through the low pressure impeller, connecting the cavity to the suction side of the low pressure impeller.

Abstract: In a water pump for pumping coolant in a low temperature and a high temperature circuit with low temperature and high temperature housings each including a spiral flow guide structure, and a single rotor disposed in the joined housings and having a low temperature rotor part for pumping coolant through the low temperature circuit and a high temperature rotor part for pumping coolant through the high temperature circuit, the housings are joined with a heat isolating structure disposed between the flow guide structures of the high temperature and the low temperature housings to limit heat transfer from the high temperature coolant pumped through the high temperature housing to the low temperature coolant pumped through the low temperature housing.

Abstract: A turbocharger with a high pressure (HP) and low pressure (LP) stage, designed such that swirl in a conduit providing fluid communication between the LP compressor outlet and the HP compressor inlet is received by the second stage compressor counter to the direction of rotation of the second stage compressor wheel. This is achieved without requiring vanes such as inlet guide vanes, and thus is highly efficient as well as free of blockage and excitation.

Abstract: With the multi-stage centrifugal pump assembly, the connection between the motor shaft (7) and the pump shaft (9) is effected by way of a thread (26, 27), which joins the fits (31, 34) lying therebehind, between a pocket hole bore (24) in the pump-side end of the motor shaft (7) and the motor-side end of the pump shaft (9). Thereby, a transition fit (32) is provided in the region of the bearing (11), and a press fit 34 in the free region therebehind.

Abstract: A technique is provided for improving the efficiency of a centrifugal pump. The centrifugal pump comprises diffusers that optimize the area schedule through the diffuser to diffuse the total fluid velocity and recover dynamic head while minimizing flow separation. Each diffuser comprises an improved transition from the diffuser blade into the diffuser discharge duct to remove abrupt changes in area and to reduce fluid separation. The impellers also can be constructed with impeller transitions able to reduce fluid separation and improve the efficiency of the pump.

Abstract: The present invention provides an apparatus and method for rotationally controlling a bearing assembly using a geared coupling system in combination with a supercharger including an input shaft. Generally, the geared coupling system includes a bearing assembly rotatably supporting a high speed shaft associated with an impeller, the bearing assembly including at least one inner bearing and at least one outer bearing; a drive gear associated with the input shaft and including a plurality of engaging members; and a geared coupler extending from a towards a plurality of engaging members adapted for engagement with the low speed gear, the geared coupler presenting an inner surface for receiving said inner bearing and an outer surface for receiving said outer bearing.