Abstract: Apparatuses, systems and methods for implementing a downhole alternator assembly are disclosed. In some embodiments, a downhole alternator assembly comprises a casing; a turbine disposed within the casing and actuated by a drilling fluid flow; and a rotor disposed within the casing. The rotor includes a cylindrical rotor core rotated by the turbine; a plurality of permanent magnets disposed in the cylindrical rotor core; and a drilling fluid channel extending axially through the center of the cylindrical rotor core. The downhole alternator assembly includes a stator disposed within the casing. The stator includes a cylindrical stator core disposed concentrically between the cylindrical rotor core and the casing; conductor windings within the cylindrical stator core; and a plurality of radially distributed fluid channels extending axially within the cylindrical stator core between a front end of the cylindrical stator core and a back end of the cylindrical stator core.

Abstract: An assembly and a method for lubricating an electric submersible pump assembly disposed in a wellbore are described. The assembly includes a pump to pressurize a wellbore fluid and an electric motor to rotate the pump. The electric motor is lubricated by a dielectric oil. A sensor is coupled to the electric motor to sense a condition of the electric motor and transmit a signal including a value representing the condition. A controller is coupled to the electric motor and the sensor. The controller receives the signal from the sensor, compares the value to a threshold value, determines when the value is greater than the threshold value, and responsive to determining that the value is greater than a threshold value indicating a presence of contaminated dielectric oil, flows a clean dielectric oil from an accumulator to the electric motor to expel the contaminated dielectric oil out of the electric motor.

Abstract: There is provided a blood pump. An exemplary blood pump comprises an impeller with a rotational axis in a pump housing. The exemplary blood pump also comprises a first element that comprises a Lomakin bearing, and a second element physically separated from the first element, the second element comprising a radial magnetic bearing.

Abstract: Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pumping chamber. A spindle magnet assembly includes first and second magnets disposed within the spindle. The first and second magnets are arranged proximate each other with their respective magnetic vectors opposing each other. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.

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: A cryogenic submerged multi-stage pump assembly includes a vertically oriented pump shaft. A permanent magnet electrical motor includes a rotor attached to the pump shaft and a stator disposed about the rotor. A first-stage impeller assembly includes a first impeller attached to the pump shaft, the first impeller configured to move a cryogenic fluid from a first impeller inlet to a first impeller outlet when the pump shaft is rotated by the electric motor. A second-stage impeller assembly includes a second impeller attached to the pump shaft, the second impeller configured to move the cryogenic fluid from a first impeller housing to a second impeller inlet and then to a second impeller outlet when the pump shaft is rotated by the electric motor. The first and a second impeller housing are disposed about the first and second impellers and configured to channel the cryogenic fluid.

Abstract: A downhole well pumping assembly has a shroud with an upper section and a lower section sealed from one another. A submersible pump and a gas separator are housed within the upper section of the shroud. The gas separator has a liquid outlet in fluid communication with an intake of the pump, and a gas outlet in fluid communication with the gas outlet in the shroud. A motor is housed within the lower section of the shroud, the motor being coupled to the gas separator for rotating the gas separator and the pump. A well fluid lower inlet is in the shroud below the motor and a well fluid lower outlet is in the shroud above the motor.

Abstract: A submersible well pump assembly has a rotary pump, a motor, and a seal section coupled between the motor and the pump. The seal section has a cylindrical housing having upper and lower adapter and a shaft extending axially through the housing. A guide tube surrounds the shaft and a bellows surrounds the guide tube. A well fluid passage communicates well fluid to a well fluid chamber between the bellows and the housing. A guide tube passage extends axially within the guide tube between an interior and an exterior of the guide tube from an upper portion to a lower portion of the guide tube for communicating lubricant in the motor with lubricant within the bellows.

Abstract: A fan has a fan, an impeller and a motor. The impeller is disposed in the fan frame, and the motor is disposed in the fan frame for driving the impeller. The fan frame has a housing, a base and at least one connecting element. The housing has an inlet and an outlet, and the base is disposed in the housing and at the outlet. The connecting element is disposed between the housing and the base. The base has a first airflow guiding structure disposed on the circumference of the base. The housing has a second airflow guiding structure disposed on the inner circumference thereof and adjacent to the outlet. The first airflow guiding structure and the second airflow guiding structure are correspondingly disposed.

Abstract: The present invention concerns a submerged pump with electrical cables external of the cylindrical lateral wall wherein the protection means, conformed for the lodging of said cables, are predisposed to be restrained to the pump body by means of quick fixing devices associable to bayonet sliding triggers for quick and stable locking and releasing, between said means of protection and the lateral wall of the pump, with possibly interposed fixed lantern elements and a resilient protection band as a suction filter.

Abstract: In an axial fan including a motor, a substrate that connects ends of a plurality of coils is disposed at a position axially under a bottom portion of a case with an axial gap therebetween. A spacer is interposed between the substrate and the bottom portion, and the substrate is fixed to the spacer. A plurality of through holes provided in the bottom portion are disposed in axial alignment with a plurality of through holes provided in the spacer. An air flow produced by rotation of an impeller at least partially passes through the interior of the case to be discharged to outside of the case through the through holes in the bottom portion so that heat generated inside the motor can be efficiently transferred to outside of the case.

Abstract: Provided is a fluid pump including: a motor unit that comprises a stator, a rotor, and a rotational shaft on which the rotor is fixed, to thus generate a rotating torque; a pump unit that is placed separately from the motor unit on one side of the motor unit, and that comprises an impeller for pumping fluid: a first power transmission unit that is fixed to the rotor and is rotated with the rotor, and that comprises a first magnet; and a second power transmission unit that is fixed to the impeller and that comprises a second magnet that is disposed facing the first magnet and has opposite polarities to those of the first magnet. Accordingly, fluid can he fundamentally prevented from being introduced into the inside of the motor unit.

Abstract: A submersible pumping system for use downhole, wherein the system includes a pump, a pump motor, a seal section, a shaft coupling the pump motor to the pump, and bearing assemblies for radially retaining the shaft in place that are offset with respect to an axis of the shaft. The offset bearing assemblies produce side loads in the shaft that reduce shaft vibration during use. The bearing assemblies can be a combination of symmetric and asymmetric assemblies set in an alternating pattern along the length of the shaft.

Abstract: A flywheel for a pump, and in particular a flywheel having a number of high density segments for use in a nuclear reactor coolant pump. The flywheel includes an inner member and an outer member. A number of high density segments are provided between the inner and outer members. The high density segments may be formed from a tungsten based alloy. A preselected gap is provided between each of the number of high density segments. The gap accommodates thermal expansion of each of the number of segments and resists the hoop stress effect/keystoning of the segments.

Abstract: A circulator includes a main body forming an air passage, an impeller, and a motor. The main body is cylindrical, in which a discharge port is formed at one end thereof, a suction port is formed at the other end thereof, and the air passage extending from the suction port to the discharge port is formed in the inside thereof. An orifice is provided annularly along an inner periphery of the air passage to locally narrow the air passage. An impeller is disposed in a part of the air passage having been narrowed by the orifice. A motor is connected to the impeller to rotate the impeller so that the air having been sucked from the suction port is blown from the discharge port.

Abstract: An electric fan includes a fan shaft driven by a fan motor supported by a motor support. An oscillating device includes a rotational shaft connected to the motor support for driving the motor support to oscillate. A transmission gear has an axle connected to the rotational shaft and a gear wheel mounted around the axle and driven by a synchronous motor. An oscillating angle limiting switch detects a rotational angle of the rotational shaft and the gear wheel and sends a signal indicative of the rotational angle. A circuit board has a processor coupled to the oscillating angle limiting switch and receives the signal. A comparing program compares the rotational angle indicated by the signal with a selected one of a plurality of preset rotational angles. The synchronous motor is driven when the rotational angle indicated by the signal is equal to the selected preset rotational angle.

Abstract: An advection fan includes a housing having a metal housing base and a closure member. A lateral wall is arranged between the metal housing base and the closure member and includes an air inlet and an air outlet. A horizontal air passage is defined between the metal housing base and the closure member. The metal housing base includes an engagement section. A stator includes a coil unit embedded in or abutting and attached to the engagement section of the metal housing base. The coil unit abuts the engagement face of the metal housing base. The coil unit includes a substrate and at least one coil formed on a surface of the substrate by printing circuit or electroforming process. An impeller is rotatably coupled to the shaft tube of the stator. A gap is formed between the impeller and the coil unit of the stator.

Abstract: In an axial fan including a motor, a substrate that connects the ends of a plurality of coils is disposed at a position axially under the bottom portion of a case with an axial gap therebetween. A spacer is interposed between the substrate and the bottom portion, and the substrate is fixed to the spacer. A plurality of through holes provided in the bottom portion are disposed in axial alignment with a plurality of through holes provided in the spacer. An air flow produced by rotation of an impeller at least partially passes through the interior of the case to be discharged to the outside of the case through the through holes in the bottom portion and in the spacer so that heat generated inside the motor can be efficiently transferred to the outside of the case.

Abstract: A technique is provided to facilitate pumping of fluids in a well environment. A submersible pumping system having a submersible pump incorporates features that manage thrust loads resulting from rotating impellers. The thrust reducing features cooperate with the action of the impellers in one or more pump stages to reduce forces otherwise acting on certain pump related components.

Abstract: To provide a circulating pump, comprising a housing, in which a pumping space is arranged, a suction connector, which is in fluid connection with the pumping space, and a pressure connector, which is in fluid connection with the pumping space, which can be produced in a simple manner and can be used in a reliable manner, wherein the suction connector and/or pressure connector are formed on at least one connector element, which is a separate part from the housing, and wherein the connector element is fixed to the housing, it is proposed that the housing have a fixing region for fixing the at least one connector element, which is arranged above the pumping space.

Abstract: A seal section for use with a downhole pumping system includes a rotatable shaft, a seal section head and a mechanical seal chamber inside the seal section head. The mechanical seal chamber is bounded by a floor and a wall. The mechanical seal chamber includes a trench disposed in the floor that is configured to entrap solid particles in the mechanical seal chamber at a distance spaced apart from the mechanical seal.

Abstract: A fan for cooling a circuit board (26) has a fan wheel (10; 10?) that is adapted for rotation about a rotation axis (11) and in a predetermined rotation direction (14), and an outer wall (18) that is rigidly joined to an inner wall (16). Defined between the two walls (16, 18) are curved air-directing conduits (39) that extend from an axial air entrance opening (40) to a radial air exit opening (42). The axial air entrance opening (40) is at a lesser distance from the rotation axis than the radial air exit opening (42), and the air-directing conduits (39) are separated from one another by air-directing blades (30, 32, 34, 36, 38) that each extend, oppositely to the predetermined rotation direction (14), from a point between two adjacent air entrance openings (40) to a point between two adjacent air exit openings (42).

Abstract: A technique facilitates a water flood, e.g. dump flood, operation. A standard electric submersible pumping system is deployed in a wellbore to draw water from an aquifer or water source zone along the wellbore. A shroud and a crossover port are used in combination with the submersible pumping system to redirect pumped water downwardly along an isolated flow path. The downward flow of pumped water is directed along the wellbore and injected into a desired, injection zone to facilitate recovery of oil or to perform other types of water flood operations.

Abstract: A water well pump is shown which uses regenerative turbine technology. A submersible electric motor has an output shaft which drives multi-stage regenerative turbine stages of the pump. The various stages are made up of turbine impellers separated by intermediate plates. The turbine impellers have peripheral vanes which cooperate with surrounding scraper rings to form flow channels through the regenerative section of the pump and impart energy to the water passing through the pump. The pump can be powered by a low energy source, such as a solar panel.

Abstract: An integrated blower for cooling device comprises an electric drive with at least one set of a flat stator and a magnetized rotor, a casing with an inlet and an outlet, and radial impeller. The flat stator integrated with the casing thus the flat stator serves as at least a part of the casing, and the magnetized rotor integrated with the radial impeller. The flat stator comprises circumferential arrayed coils with magnetic axes coincide with a plane of the flat stator. The radial impeller comprises blades attached to a backplate and a shroud, and circumferential arrayed magnetic means thus serve as the magnetized rotor. The magnetic means placed and magnetized along the plane of the flat stator thus magnetic axes of the coils and the magnetic means located at one plane substantially.

Abstract: A relative movement of a fan 1 toward a motor 2, which is one of the relative movements of the fan 1 with respect to a rotating shaft 23, is restricted by an inner ring 221 of a radial bearing 22. Due to this, the relative movement of the fan 1 toward the motor 2 is restricted by the inner ring 221 when the joining force between the fan 1 and the rotary shaft 23 is decreased, so that the contact between the fan 1 and the housing 21 can be prevented. Moreover, as the inner ring 221 rotates together with the rotating shaft 23, a rotational force is transferred from the inner ring 221 to the fan 1 in a state in which the relative movement of the fan 1 toward the motor 2 is restricted by the inner ring 221.

Abstract: A rotary machine is provided, such as an electromechanical device, that includes a housing having a lubricating oil disposed within the housing. A shaft is rotatable about an axis relative to the housing. The shaft has a passage extending to an end portion of the shaft. A screw includes a body arranged coaxial to the shaft, and preferably affixed thereto. The screw includes helical blades extending outwardly from the body adjacent to a shroud. The shroud is arranged about the screw forming a gap between the blades and the shroud. Rotation of the shaft and screw pump the oil to the end portion of the shaft and into the passage from which the oil may be delivered to other machine components, such as the bearings. A flow straightener having radial fins may be arranged between the screw and the passage for controlling the flow of oil into the passage preventing a vortex.

Abstract: An oil supply apparatus for a hermetic compressor includes: a crank shaft connected to a rotor of a driving motor so as to be rotated together with the rotor, and having an oil flow path therein; a sleeve connected at a lower end of the crank shaft so as to be rotated integrally together with the crank shaft; a sucking member disposed to maintain a certain gap against an inner circumferential face of the sleeve and sucking oil; and a support bracket installed between support springs installed between a bottom surface of a hermetic container and a stator of the driving motor so that the sucking member can be maintained in a suspended state inside the sleeve, and the sucking member. Since the plurality of legs are fixed as the seat cap is mounted between the support springs, the assembly of the sleeve and the sucking member can be simply assembled in a state that the motor and the compressing unit are already assembled.

Abstract: A motor protection system that utilizes a motor protector in combination with a submersible motor. The motor protector allows for the free flow of an internal lubricating liquid therethrough to the connected submersible motor. The internal liquid prevents the migration of surrounding, environmental liquids to the interior of the motor while allowing the internal pressure of the motor to equalize with external pressure. Additionally, the design allows the use of a power cable connector that can be coupled to the submersible motor without being sealed with respect to the environmental fluids.

Abstract: A relative movement of a fan 1 toward a motor 2, which is one of the relative movements of the fan 1 with respect to a rotating shaft 23, is restricted by an inner ring 221 of a radial bearing 22. Due to this, the relative movement of the fan 1 toward the motor 2 is restricted by the inner ring 221 when the joining force between the fan 1 and the rotary shaft 23 is decreased, so that the contact between the fan 1 and the housing 21 can be prevented. Moreover, as the inner ring 221 rotates together with the rotating shaft 23, a rotational force is transferred from the inner ring 221 to the fan 1 in a state in which the relative movement of the fan 1 toward the motor 2 is restricted by the inner ring 221.

Abstract: A motor protection system that utilizes a motor protector in combination with a submersible motor. The motor protector allows for the free flow of an internal lubricating liquid therethrough to the connected submersible motor. The internal liquid prevents the migration of surrounding, environmental liquids to the interior of the motor while allowing the internal pressure of the motor to equalize with external pressure. Additionally, the design allows the use of a power cable connector that can be coupled to the submersible motor without being sealed with respect to the environmental fluids.

Abstract: The present invention provides an electrical submersible pump assembly having a submersible pump, a submersible electrical motor drivingly connected to the pump, and a seal assembly disposed between the submersible pump and the motor. The seal assembly is generally of tubular construction and provides fluid communication between the seal assembly cavity and the motor, such fluid communication being in a circuitous path effecting gravity segregation of contaminants including particulate solids in wellbore fluids. The seal assembly thereby controls and minimizes migration of the contaminants into the body of the seal section and on into the motor.

Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated integrally with the rotary shaft, and a fixed magnet, which is opposed to the rotated magnet. The rotated and fixed magnets repel each other. The diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that of the magnetic bearing at the basal end. This decreases movement of the rotary shaft toward its distal end when the pump operates.

Abstract: Featured is a gearbox used to interconnect an electric motor to a deep oil well tube pump. The gearbox includes a drive shaft interconnected to the pump, a reduction gear assembly interconnected to the drive shaft and the electric motor, a bearing system that axially and radially supports rotating members of the reduction gear assembly, a lubrication system and a compensator that is fluidly coupled to the lubrication system. The compensator provides pressure compensation between the pressure external to the gearbox and the internal pressure of the lubrication system. The reduction gear assembly includes one or more stages of planetary gearing, wherein a final planet stage includes three or more planet wheels, a pinion cage and a pinion cage member. The bearing system includes a bearing sub-assembly for supporting the final planet stage, the bearing sub-assembly including a plurality of axial and radial bearings.

Abstract: An improved rotary compressor (1) for respiration systems with breathing gases transported in a closed system. This rotary compressor (1), which can be washed and sterilized, is has an electrically driven compressor wheel (5) mounted by means of an aerodynamic gas slide bearing. The gas slide bearing comprises radially and axially loaded surfaces, wherein either the axially loaded surface (10) of the compressor wheel (5) or the axially loaded, nonmoving housing surface (11) has grooves (22).

Abstract: An electrical submersible well pump assembly has an inducer and diffuser for applying a positive pressure to the first pump stage. The pump assembly includes a centrifugal pump with a housing having a well fluid inlet and a number of pump stages. Each pump stage has an impeller and a diffuser. An inducer is mounted in the housing upstream of the impeller of the first pump stage. The inducer has a helical flight that is rotatable in unison with the pump. A diffuser is positioned between the inducer and the impeller of the first stage.

Abstract: A light-weight electric motor driven fluid pump assembly having a molded thermoplastic housing of two parts which form a fluid impervious rotor chamber, a stationary shaft journalled in the housing parts within the chamber and carrying a magnetic rotor and a fluid impeller driven thereby. The housing parts also define inlet and discharge ports in communication with the rotor chamber adjacent the impeller blades. One portion of the housing of one housing part defines a cylindrical thin walled tubular configuration with a cylindrical exterior surface for mounting a stator thereabout. The housing parts are welded together at mating surfaces with the result that neither static nor dynamic seals are required in the assembly.

Abstract: A submersible centrifugal pump for downhole pumping of methane-saturated water from wells drilled in coal formations, has an electric motor-driven vertical shaft having centrifugal impellers distributed therealong, each impeller being located in a stationary diffuser within the pump wall to form a multi-stage pump. A concentric shroud is located at the lower portion of the pump wall. It is sealed with the pump wall such that all fluid to be pumped must enter holes near the top of the shroud and travel downward through an annulus to the pump inlet. A charge impeller and a solids grinder are located at the lower end of the pump central shaft. The multi-stage centrifugal pump is located above the solids grinder and includes multiple compression stages of diminishing volume as the methane and fluid mixture travels upward through the pump. Another charge impeller may be located at the upper end of the shaft at the outlet pipe.

Abstract: A well pump assembly has a tubular junction having a main tube and a bypass tube. An electric motor and seal section hang below the tubular junction in the main tube. The motor is powered by a power cable that extends alongside the tubing to the surface. The motor has an upper end with a drive shaft coupling. The pump for the motor is lowered through the production tubing on a wireline, wire rope or coiled tubing. The pump has a lower end which has a driven shaft coupling that makes up in stabbing engagement with the drive shaft coupling when the pump reaches the motor. The driven shaft coupling includes a guide that slides into a coupling housing. Orientating keys orient the guide and lock it from rotation. The bypass tube of the tubular junction may receive workover tools that are diverted by a wireline tool.

Abstract: A portable, self-contained pump having a battery carried on board. The pump includes a pumping device for forcing liquids to flow, such as those including impellers, plungers or reciprocating pistons, diaphragms, and others, a motor, the battery, electrical circuitry connecting the battery to the motor, and a housing enclosing the aforementioned components. A clip for suspending the pump from the belt of a user is fixed to the housing. The housing also includes an access panel affording access to the interior of the pumping device for service, such as clearing clogs, and a switch for controlling the motor. A threaded inlet nipple and a threaded outlet nipple project from the housing. Accessories for the pump include a stand, a plurality of auxiliary hoses or conduits enabling retrieval and directing discharge of liquids, and an auxiliary liquid receptacle for dispensing liquids from the novel pump. The auxiliary conduits are threaded for enabling connection to the inlet and outlet nipples.

Abstract: Decoupling devices for an electric motor in relation to a housing usually have decoupling bushes made of elastic material, which are disposed between a motor mount and the housing and extend along a bush longitudinal axis. The decoupling device includes a first contact point at which the decoupling device rests against the motor mount, and a second contact point at which the decoupling device rests at least indirectly against the housing, each decoupling bush is secured so that the decoupling bush can be radially deflected in relation to the bush longitudinal axis, by means of which the forces are in fact transmitted, but vibrations are damped or insulated.