Abstract: A one-way airflow dual fan assembly of dismantling ease, comprising a first installation casing and a second installation casing, the first installation casing is aligned with the second installation casing, a flap is respectively fixed in both the first installation casing and the second installation casing, a cover plate is provided in the flap, connection mechanisms are provided between the cover plate and the flap, the flap is connected with the cover plate via the plurality of connection mechanisms, and the connection mechanisms comprise respectively a flexible connection component and a limiting part. By cooperation of the cover plates and the connection mechanisms, by pulling the cover plates, under limiting actions of the second wedges, the first wedges are pressed, the U-shaped connection blocks deform flexibly until the flexible connection components are released, and the cover plates are released from the flaps, so that the cover plates can be disassembled.

Abstract: The present disclosure provides a motor for a high-speed electric hair dryer. The motor for the high-speed electric hair dryer includes: an air duct shell, a stator mechanism, a rotor mechanism, blades and a concave motor bracket. The rotor mechanism includes a rotating shaft, a first bearing, a second bearing and a magnetic ring. The stator mechanism is fixed in the concave motor bracket. Installation holes for installing the first bearing and the second bearing are formed in two ends of the concave motor bracket. A semicircular machine cover is arranged on the concave motor bracket. The magnetic ring is arranged in the stator mechanism, the concave motor bracket is fixed in the air duct shell. The rotating shaft passes through one end of the first bearing and is connected to the blades, and the blades are installed in the air duct shell.

Abstract: A blower assembly for an HVAC system includes a blower wheel, which includes a plurality of blades. A laminated insert is concentric with the blower wheel and radially inward of the plurality of blades. A shaft is coupled to the blower wheel through the laminated insert.

Abstract: Proposed is a through type drain pump for a fluid draining apparatus of a fluid pipe. The drain pump includes: a housing formed in a hollow cylindrical shape, the housing being configured such that a fluid inlet port and a fluid outlet port are in communication with each other via a fluid movement path; a rotary shaft having a driving motor, the rotary shaft being rotatably coupled to an output shaft of the driving motor via a coupler; an impeller formed at a lower end of the rotary shaft and configured to be rotated so that the fluid is moved to the fluid outlet port through the fluid movement path; and a mounter mounted at a lower outer side surface of the housing and configured to mount the drain pump on any pipe such that the drain pump is capable of being lifted and inserted into the pipe.

Abstract: Provided are a turbo compressor and a centrifugal chiller comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small.

Abstract: A sealed induction motor for a chiller assembly is provided. The induction motor includes a stator, a rotor, and a shaft with a first end and a second end. The rotor and the shaft are configured to rotate relative to the stator. The induction motor further includes a first magnetic bearing assembly located proximate the first end of the shaft and a second magnetic bearing assembly located proximate the second end of the shaft. The first and the second magnetic bearing assemblies are configured to support the shaft. The shaft is coupled to a centrifugal compressor using a direct drive connection.

Abstract: Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that may include a magnetic drive system of a blood pump. The magnetic drive system may include a drive shaft coupled to an impeller, a driven magnet assembly coupled to at least one of the drive shaft and the impeller, and a driving coil assembly configured to drive the driven magnet assembly.

Abstract: A motor assembly includes a first bearing installed on a rotating shaft adjacent to an impeller to support a first support part of the rotating shaft, a second bearing installed on the rotating shaft adjacent to the rotor to support a second support part of the rotating shaft, a bearing bracket receiving the first and second bearings therein, an elastic member inserted between the first bearing and the bearing bracket or between the second bearing and the bearing bracket to press either the first bearing or the second bearing to get closer to each other, and a separation preventing member installed on the bearing bracket to fix the first bearing, the second bearing and the elastic member to an inner space of the bearing bracket such that at least one portion of the separation preventing member overlaps with one of the first bearing, the second bearing and the elastic member.

Abstract: The invention provides a motor for generating rotary power, the motor comprising: a stator for receiving electrical power; a rotor arranged coaxially with respect to the stator and having one or more magnets arranged thereon so that in response to the stator receiving the electrical power, the rotor is caused to rotate; the rotor comprising a rotor housing having an inner wall, the magnets being arranged around the housing, and wherein the inner wall has plural tortuous paths for the flow of coolant extending along the length of the rotor housing. Preferably, the motor has an output shaft arranged at least partially axially within the rotor housing; the inner wall being shaped for engagement with and so as to drive the output shaft.

Abstract: Provided is a gear box including a lubricating oil pool arranged at a bottom of the gear box, and at least one oil stirring box that includes an oil storage chamber, the oil storage chamber being provided with an oil scooping port and at least one oil outlet. The at least one oil stirring box is arranged on a rotary component in the gear box and rotatable along with the rotary component. A lubricating oil in the lubricating oil pool is allowed to flow through the oil scooping port into the oil storage chamber when the at least one oil stirring box rotates to the lubricating oil pool. The lubricating oil in the oil storage chamber is further allowed to flow out of the at least one oil outlet to a lubrication point when the oil stirring box rotates to the vicinity of the lubrication point.

Abstract: An electric submersible pump (ESP) assembly. The ESP assembly comprises an electric motor, a centrifugal pump, and a hybrid magnetic radial bearing, wherein the hybrid magnetic radial bearing is disposed inside the electric motor or disposed inside the centrifugal pump.

Abstract: An axial flow pump for pumping a liquid has a motor. The motor of the pump is arranged such that the liquid to be pumped flows around the motor. No elaborate rotary leadthroughs of the pump shaft through the pipe system are needed. Furthermore, the bearings of the motor are lubricated by the liquid to be pumped, thereby avoiding risky oil lubrication. As a result, the axial flow pump is suitable for use in drinking water pipelines.

Abstract: A motor unit includes a motor having a motor shaft disposed along a central axis which extends in an axial direction, and a cooling unit which cools the motor, wherein the cooling unit includes a first suction port configured to suction a first refrigerant which cools the motor, a first discharge port configured to discharge the first refrigerant suctioned from the first suction port, a second suction port configured to suction a second refrigerant which cools the first refrigerant by exchanging heat with the first refrigerant, and a second discharge port configured to discharge the second refrigerant suctioned from the second suction port.

Abstract: A mechanical circulatory support device. The mechanical circulatory support device includes an inner casing defining a fluid flow path, the fluid flow path defines a longitudinal axis. A rotor is mounted within the fluid flow path and configured to rotate about the longitudinal axis. A housing is included, the inner casing and the rotor being substantially disposed within the housing. The housing having a cross-sectional shape in a plane transverse to the longitudinal axis which decreases in thickness extending from a medial position to opposite lateral positions.

Abstract: In accordance with one aspect of the present exemplary embodiment, a molten metal pump comprising a refractory material body defining an elongated chamber is provided. The chamber is configured to receive a shaft and impeller assembly. The chamber includes an open top through which the shaft passes and a bottom inlet. The impeller is located in or adjacent the inlet. The body further defines an elongated passage adjacent to the chamber. An opening provides fluid communication between the elongated passage and the elongated chamber. The elongated passage is in fluid communication with a discharge channel configured to direct molten metal at least substantially perpendicular to an elongated axis of the elongated chamber.

Abstract: A porous gas bearing is disclosed. The porous gas bearing includes a housing having a fluid inlet and an aperture. A porous surface layer is disposed within the housing surrounding the aperture in a circumferential direction. The porous surface layer includes a plurality of segments arranged in a longitudinal direction of the aperture. The porous surface layer is in fluid communication with the fluid inlet. A damping system includes a plurality of dampers. The plurality of dampers is disposed circumferentially about the aperture. The plurality of dampers is arranged in between a first segment of the plurality of segments of the porous surface layer and a second segment of the plurality of segments of the porous surface layer.

Abstract: A mechanical circulatory support device. The mechanical circulatory support device includes an inner casing defining a fluid flow path, the fluid flow path defines a longitudinal axis. A rotor is mounted within the fluid flow path and configured to rotate about the longitudinal axis. A housing is included, the inner casing and the rotor being substantially disposed within the housing. The housing having a cross-sectional shape in a plane transverse to the longitudinal axis which decreases in thickness extending from a medial position to opposite lateral positions.

Abstract: An electric compressor for compressing a gas, and in particular, an electric compressor for a motor vehicle comprising a compressor wheel, an electric motor, wherein the compressor wheel can be driven by the electric motor, a control unit, wherein the electric motor can be controlled by the control unit, and a housing having at least one open end for receiving the control unit. The housing has at least one recess on the inner circumference at the open end that is designed so as to be open in the direction of the housing interior. The control unit can be inserted into the housing in such a way that it closes the open end of the housing and the recess on the inner circumference.

Abstract: A centrifugal compressor (1) that includes: an auxiliary bearing (7) which supports a shaft (2), which is supported by a magnetic bearing (6), when the shaft (2) is displaced from a reference position; and a stopper (8) that is provided only for a first auxiliary bearing (7a) among the first auxiliary bearing (7a) and a second auxiliary bearing (7b), that is fixed to the shaft (2), and that restricts a movement of the shaft (2) in both directions in an axial direction by the stopper (8) being brought into contact with the first auxiliary bearing (7a).

Abstract: A shaftless fan structure having an axial air slit includes: a base, including a bottom plate connected with a fasten post; a rotor set, including a impeller sleeved on the fasten post and a magnetic member, wherein the impeller is formed with a bottom surface oppositely arranged with respect to the bottom plate, and the magnetic member is disposed on the bottom surface; a rolling bearing, fastened between the fasten post and the rotor set; and a stator set, disposed on the bottom plate and including a magnetic inducing portion oppositely arranged with respect to the magnetic member, wherein an axial air slit is formed between the magnetic inducing portion and the magnetic member. Accordingly, an objective of being shaftless is achieved, and the total height can be reduced through altering the arrangement of the magnetic member and the stator set.

Abstract: A vacuum pump comprises: a ball bearing which supports a rotor; a holding section which elastically holds an outer ring of the ball bearing; and a grease which is filled between the outer ring and the holding section, the grease having a consistency of NLGI No. 1.5 or less.

Abstract: A shaftless fan includes a fan stator, a vane rotor and a rolling bearing. The rolling bearing is installed between the fan stator and the vane rotor and includes an inner ring, an outer ring, and a plurality of rolling elements rollably installed between the inner and outer rings, and the inner and outer rings of the rolling bearing are rotated in opposite direction with respect to each other, so that the vane rotor can be rotated on the fan stator to connect the fan stator with the vane rotor through the rolling bearing, so as to achieve the shaftless effect.

Abstract: A flow measurement assembly includes a coupler and a flow channel. The coupler maintains a magnet and a sensor spaced from the magnet. The flow channel is positionable between the magnet and the sensor. The flow channel includes a housing having an inlet, an outlet spaced from the inlet, and a flow conduit fluidly open to the inlet and the outlet. A ferrous body is movably disposed in the conduit. The sensor is configured to detect a frequency of a change within a magnetic field as the ferrous body travels within the flow conduit between the magnet and the sensor.

Abstract: A centrifugal blood pump for circulating blood is provided, wherein an impeller makes no contact at all with a housing and a rotating shaft and moves in a rotating manner with the impeller in a stably levitating state. Also provided is a blood pump in which the impeller rotates at high speed even when the blood pump is reduced in scale. The blood pump contains a magnet of enhanced magnetic force at the inside of a housing and at an outer peripheral surface of an impeller and providing a fixed-interval spacing on the periphery of a bearing section makes it possible to ensure a state where no contact at all is made between the housing, a shaft, and the impeller, and makes it possible to cause the impeller to rotate stably over a long period of time.

Abstract: The present invention relates to a downhole electrical motor elongated in a longitudinal direction, comprising a housing, a stator comprised inside the housing, a rotor comprised inside the stator rotatably connected to the stator, wherein the rotor has a locked end and a non-locked end and is locked in the locked end to avoid movement of the rotor in the longitudinal direction, and the rotor is able to move along the longitudinal direction in the non-locked end of the rotor to avoid thrust loads on the rotor due to thermal expansion of the rotor during rotor heating when the electrical motor is in operation and further comprising a locked bearing connected to the stator for supporting the rotor in the locked end and a non-locked bearing connected to the stator for supporting the rotor in the non-locked end, wherein the bearings are at least partially made from a ceramic material.

Abstract: A system and a method for starting a rotor of an implantable blood pump are described. For example, a blood pump system includes a rotary motor having a stator and a rotor. The rotor has permanent magnetic poles for magnetic levitation of the rotor, and the stator has a plurality of pole pieces arranged circumferentially at intervals. The blood pump system includes a controller configured to control a start phase of the rotor, wherein the start phase is prior to the rotor being positioned in a predefined geometric volume for pumping blood and wherein the start phase includes performing a rotation of the rotor by an angle larger than an angle corresponding to a quarter of an angular distance between two neighboring magnetic poles of the rotor.

Abstract: A rotor (2) provided for a canned motor of a wet-running centrifugal pump forms the shaft for the drive of the impeller (7) and includes at least one permanent magnet (12) which is encapsulated in a fluid-tight manner. The peripheral part of the encapsulation in the region of the at least one permanent magnet (12) forms the rotor shaft.

Abstract: A medical functional device includes at least one first fluid system for receiving at least one medical fluid, at least one first conveying device for conveying the medical fluid, at least one second fluid system for receiving at least one operating fluid, and at least one second conveying device for operating the at least first conveying device, in which the first conveying device is arranged such as to be actuated by means of the operating fluid. A treatment apparatus and a method are also described.

Abstract: A pump for pumping molten metal includes a refractory base that can be submerged in a bath of molten metal. A refractory shaft sleeve has upper and lower end portions and is fastened to the base at the lower end portion. The shaft sleeve is enclosed at the upper end portion and includes openings at a lower end portion. The base includes an impeller chamber that is in fluid communication with the shaft sleeve and includes an outlet from the impeller chamber. The pump includes a motor. A refractory shaft extends in the shaft sleeve and is connected to the motor. A refractory impeller is connected to the shaft and is rotatable in the impeller chamber of the base. A gas source flows gas comprising inert gas into the shaft sleeve under pressure. A regulator regulates at least one of flow rate and pressure of the gas so as to avoid cavitation of the pump while outletting the gas through the openings of the shaft sleeve.

Abstract: This centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a first permanent magnet provided in one surface of the impeller, and a second permanent magnet provided in an inner wall of the blood chamber, for attracting the first permanent magnet. The attractive force between the first permanent magnet and the second permanent magnet on the opening side of a sidewall of the blood chamber is set to be smaller than the attractive force between the first permanent magnet and the second permanent magnet on the opposite side of the opening. As a result, inclination of the impeller with respect to a dividing wall during pump operation can be prevented.

Abstract: A tube pump for transferring molten metal includes a refractory tube having upper and lower end portions. A motor is disposed near the upper end portion of the refractory tube. A refractory shaft extends in the refractory tube and is connected to the motor near the upper end portion of the refractory tube. A refractory impeller is connected to the shaft in the lower end portion of the refractory tube. An upper outlet extends from upper end portion of the refractory tube through which molten metal flows upon rotation of the impeller. The refractory tube is enclosed at its upper end portion. A gas source flows gas into the refractory tube at or near its upper end portion under a pressure which prevents overflow of the molten metal above the outlet. Flux may be directed into the refractory tube alone or with gas.

Abstract: A laser-welded joint structure between insulation frame and bearing cup of fan includes a base having a bearing cup and a stator having at least one insulation frame. The insulation frame includes a sleeve portion defining a bore axially extending therethrough. The sleeve portion is provided on an inner wall surface with at least one pressing section that radially projects into the bore to press a lower side against an upper end of the bearing cup and a bearing received therein. A portion of at least one lateral side of each pressing section that is in contact with the upper end of the bearing cup is melted by laser beam to form a laser-welded joint, so that the insulation frame and the bearing cup are integrally connected together at reduced manufacturing cost and have increased structural strength. A method of forming the laser-welded joint structure is also disclosed.

Abstract: The internal-driven compressor having a powered compressor rotor. The internal-driven compressor includes a compressor housing including a suction port and a discharge port, an internal driver including a rotor and a stator, the rotor and the stator located within the compressor housing, the stator located radially inward of the rotor, and a powered compressor rotor including an annular body extending about a center axis, wherein the rotor is fixed to the powered compressor rotor and configured to rotate the powered compressor rotor about the center axis in response to a force imparted by the stator.

Abstract: An electric vacuum pump includes a rotary member including an armature and a commutator; a brush arranged to slide in contact with the commutator; a motor part provided with a rotary shaft integral with the rotary member; a pump part connected to the rotary shaft and configured to operate in sync with the motor part; and a bearing supporting the rotary shaft between the motor part and the pump part, the commutator and the brush being placed on a non-pump side opposite to a pump side on which the pump part is placed in an axial direction of the rotary shaft with respect to the armature.

Abstract: An oil-retaining bearing fan device includes a fan base seat, at least one oil-retaining bearing and at least one magnetic member. The oil-retaining bearing is disposed in a bearing hole of the fan base seat. The oil-retaining bearing has at least one receiving hole for receiving the magnetic member therein. The magnetic member serves to apply a magnetic attraction force to a shaft of the fan device to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan device in operation. Therefore, the lifetime of the fan device can be prolonged.

Abstract: The invention relates to a system and method of providing a compressor mechanism having a front housing, center housing and rear housing. The center housing includes an integrated compressor bearing support and compressor base surface that divides the housing into cantilevered wall sections. The system and method constructed in this manner provides a compact structure for an electric compressor with the ability to reduce noise vibration harshness.

Abstract: An assembly or system is provided for selectively regulating journal bearing lubrication between at least first and second levels in an aircraft engine. A high pressure pump includes movable portions at least in part supported by a journal bearing. A selector valve is configured to selectively supply lubrication flow to the journal bearing. In addition, a relief valve is configured to receive a signal from the selector valve defining a pressure level at which the relief valve should relieve pressure.

Abstract: A magnetic bearing device comprises a first carrier generation section generating a first carrier signal; a second carrier generation section generating a second carrier signal whose phase differs by (?/2+?) radian from the phase of the first carrier signal; a first demodulation section performing demodulation by sampling the first modulated signal at sampling timing shifted by a phase ? from timing at which the first carrier signal becomes a peak; a second demodulation section performing demodulation by sampling the second modulated signal at sampling timing shifted by a phase (??) from timing at which the second carrier signal becomes a peak; and a controller controlling current in each of the first radial electromagnet and the second radial electromagnet, based on a result of the demodulation by each of the first demodulation section and the second demodulation section.

Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.

Abstract: A thrust shaft for a fan has a shaft body with an enlarged disk adjacent one axial end to provide a rotating surface in a pair of thrust bearings. A first cylindrical portion extends from the disk in a first direction, and a second cylindrical portion extending from the disk in a second opposed direction. The second cylindrical portion has a hollow bore, and there are a plurality of holes extending through the second cylindrical portion to communicate an outer periphery with the bore. A ratio of the diameter of the bore to a diameter of the plurality of air holes is between 6.60 and 7.00. A ratio of an overall length of the second cylindrical portion, and a distance from a face of the enlarged disk to a center of the holes is between 14.4 and 15.2. A thrust bearing assembly, a fan, a cabin air supply system, and a method are also disclosed.

Abstract: A pump assembly includes an electric drive motor having a stator and a permanent magnet rotor, at least one impeller connected to the rotor via a rotor shaft, a thrust bearing accommodating axial forces acting on the impeller and rotor shaft in operation, and at least one radial bearing arranged on the rotor shaft. The rotor and stator are designed such that a magnetic axial force, acting in the direction of the rotation axis of the rotor and acting on the rotor in the direction of the inflow direction into the impeller, is produced between the rotor and the stator. The rotor shaft and rotor are mounted displaceably in the axial direction relative to the stator, and with an axial displacement of the rotor shaft in the inflow direction into the impeller, the bearing surfaces of the radial bearing lying opposite one another at least partly disengage.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.

Abstract: A pump assembly has an electric drive motor which is designed as a canned motor which has a bearing (22) in the interior of motor can (14), on which a motor shaft (20) is supported. The bearing (22) has an outer diameter that is smaller than an inside diameter of the motor can (14) and the bearing (22) in the interior of the motor can (14) is supported on a bearing holder (24) which has multiple steps (40) extending traversely to an inner circumference of the motor can (14).

Abstract: An electromagnet has a core with a pair of magnetic poles, a primary coil wound around the core, and a series circuit of a first auxiliary coil wound around the first magnetic pole of the core, a second auxiliary coil wound around the second magnetic pole of the core, and capacitors, and is connected in parallel to the primary coil and the series circuit. The first and the second magnetic poles are each divided into a plurality of split magnetic poles. The first auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in the plurality of split magnetic poles of the first magnetic pole so that the mutual inductance with the primary coil becomes zero. The second auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in a plurality of split magnetic poles of the second magnetic pole so that the mutual inductance with the primary coil becomes zero.

Abstract: A pump assembly includes a pump housing (2) and a stator housing (16), which is connected to the pump housing (2) and in which a wet-running electric motor with a can (18, 18?) is arranged. A plate-like bearing carrier (26, 26?) of sheet-material is arranged between the pump housing and the stator housing (16). The bearing carrier (26, 26?) includes a centering surface (40, 40?) in a manner distanced to its free peripheral edge, said centering surface coming into bearing contact on a corresponding contact surface (42) of the pump housing (2) in a manner such that the bearing carrier (26, 26?) with the can (18, 18?) is centered relative to the pump housing (2).

Abstract: A mini-fan has a drive motor having an external rotor (222) and an internal stator (244). The external rotor (222) is equipped with a rotor shaft (234) that has a necked down portion (258) in the region of its free end (235). The mini-fan (216) has a bearing tube (238) on whose outer side the internal stator (244) is mounted and in whose interior is arranged a bearing arrangement (236) in which the rotor shaft (234) is rotatably supported. A closure arrangement (262) serves to close off the bearing tube (238) in liquid-tight fashion at one end, and is equipped, in the region of the necked down portion (258) of the rotor shaft (234), with at least one resilient securing member (260) that engages into that necked down portion (258) and secures the rotor shaft (234) against being pulled out of the bearing arrangement (236).

Abstract: A centrifugal compressor for compressing a refrigerant vapour in a refrigeration cycle. The compressor comprises an impeller drive shaft (28) supported by first and second radial bearings (32) for rotation within the compressor housing and an impeller assembly including at least one centrifugal impeller wheel mounted on the impeller drive shaft to rotate with the impeller drive shaft. The first and second radial bearings are hydrodynamic fluid bearings in which the bearing fluid is the refrigerant vapour. The compressor further comprising a conduit (36) for supplying a portion of the refrigerant vapour from the impeller assembly to the first and second fluid bearings.

Abstract: A magnetic bearing body supports a rotating shaft using a combined electromagnetic force of a pair of control electromagnets without contact. A controller detects a control index value based on a first coil current passed through a coil of a first control electromagnet of the pair of control electromagnets which generates an electromagnetic force in the same direction as that of a load exerted on the rotating shaft, the control index value being an index of the degree of margin for error in control depending on a value of the first coil current. And the controller controls a middle value of a pair of coil currents passed through the respective corresponding coils of the pair of control electromagnets so that the control index value approaches a predetermined target index value.

Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.

Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.