A tool includes a device including a housing and a rotor, the rotor to rotate about a longitudinal axis, and an axial gap generator including a stator assembly positioned adjacent to the rotor. The axial gap generator generates a voltage signal as a function of a gap spacing between the stator assembly and the rotor, the gap spacing being parallel to the longitudinal axis.

A pump device (10) includes a housing (30) including a blood inflow port (38) through which blood flows in, and having a fixed-side repulsive magnet (44) disposed in an annular manner; and an impeller (14) that is rotatably housed inside the housing (30), and having a movable-side repulsive magnet (56) disposed in an annular manner. The fixed-side repulsive magnet (44) is disposed in a position offset toward the blood inflow port (38) side relative to the movable-side repulsive magnet (56). In the fixed-side repulsive magnet (44) and the movable-side repulsive magnet (56), a fixed-side repulsive surface (44a) and a movable-side repulsive surface (56a) adjacent to each other have the same polarity.

Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.

Subsea turbomachine for boosting the pressure of petroleum fluid flow from subsea petroleum productions wells or systems, comprising an electric motor and a compressor or pump driven by the electric motor, a fluid inlet and a fluid outlet, distinctive that the turbomachine comprises a pressure housing common for the electric motor or stator, and compressor, pump or rotor; a magnetic gear inside the common pressure housing for operative connection between the motor or stator and compressor, pump or rotor; and a partition inside the common pressure housing, arranged so as to separate a motor or stator compartment from a compressor, pump or rotor compartment.

A pump motor having a permanent magnet rotor, a containment shell, a wound stator, a motor housing, a pump head, a shaft, which is secured in the containment shell on the one hand and in the pump head on the other hand, and a fixed bearing, which is pressed or injected into the permanent magnet rotor and rotatably mounts it on the shaft. The pump motor provides a reliable and economically producible bearing of the permanent magnet rotor on the shaft in a generic pump motor, in which the bearing abutting uniformly against the shaft over the entire bearing length and during a complete rotation can be achieved, small angle errors can be compensated, and noises can be reduced.

Rotary devices having a casing and an inner drive portion of a magnet coupling disposed inside of a rotor assembly are disclosed. The inner drive portion and rotor assembly are disposed within the casing and rotatable about a rotational axis. The rotor assembly includes a bushing between the magnets of the rotor assembly and a stationary canister is sealed to the casing and separates an internal fluid chamber within the casing from the inner driven portion. The stationary canister can be of multi-piece or unitary construction and is held in position by a front portion of the casing.

A fluid pump assembly is provided. The pump has a pair of units magnetically coupled to each other. The first unit contains a drive motor and a magnetic assembly. The second unit contains a magnetic assembly and a blade of a propeller/impeller for imparting movement to a fluid. As the first unit is activated by the drive motor, a magnetic flux is created which in turn rotates the magnetic assembly in the second unit, driving the blade.

A magnetically driven centrifugal pump has a pump case, an open vane impeller in the pump case, a stuffing box including a stuffing box outer being fixed relative to the pump case and a stuffing box inner threadedly engaged with the stuffing box outer, and a rotor axially fixed and rotatably mounted in the stuffing box inner. Bushings are arranged between the rotor and the stuffing box inner. A drive is fixed relative to the pump case and includes a drive output extending into the rotor. There is a magnetic coupling between the rotor and the drive and a canister fixed to the stuffing box and extending through the magnetic coupling to isolate the rotor from the drive. A rub ring closes the end of the stuffing box inner and constrains the drive output from damaging the canister under catastrophic bearing failure.

A pump casing defines an inner space including an inlet into which a fluid is introduced, a flow path through which the fluid is introduced from the inlet and discharged to the outside, and an arrangement space in which an impeller rotated about a predetermined central axis is disposed so as to guide flow of the fluid. The pump casing includes a suction casing which forms the inlet, a volute casing which forms the flow path, and the introduced fluid is discharged to the outside by the impeller. The volute casing forms the arrangement space in which the impeller is disposed, and the pump casing further includes a fluid guide device which is disposed in the inner space to guide movement of the fluid which is moved from the inlet toward the arrangement space.

Provided is an electric water pump in which a portion of a fluid discharged from the vicinity of an outer peripheral edge of an impeller flows between the impeller and a lower casing, flows between a rotor and the lower casing, flows between a shaft and the rotor along a channel formed inside the rotor, and then flows to an inlet side of the impeller such that the fluid circulates outside and inside the rotor, and thus, foreign matters contained in the fluid do not accumulate in an accommodation space between the rotor and the lower casing, and thus, efficiency and durability of a motor can be improved.