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.

A pump device may include a motor, an impeller to turn by use of drive power of the motor, and a circuit board for controlling the motor; the pump device being able to become low-profile in an axial direction of a turning center shaft as a turning center of the impeller. In a pump device, there are formed a wall part surrounding a circuit board and a substrate contacting surface, which contacts a lower surface of the circuit board in order to locate circuit board, in a pump case. In the wall part, there is shaped a cutout part that is cut out downward from an upper end surface of the wall part, and meanwhile a leading wire, whose one end side is soldered to the circuit board, passes through the cutout part in such a way as to be drawn out to an outer side of the wall part. In the pump device, a cutout bottom part, which is a lower end part of the cutout part, and the leading wire do not contact each other so as to be detached from each other.

A multi-outlet fluid pump includes a housing, a motorized pump, an electrical power supply, and a self-locking thermal cutoff. In one form, the pump includes a first or primary thermal cutoff and a second or secondary thermal cutoff to prevent the pump from operating once a thermal cutoff has deactivated the pump until a user or operator has taken some affirmative action. Related methods are also disclosed herein. In some forms an indicator is provided to indicate if the thermal cutoff has disabled the pump to alert a user as to the need to unplug or reset the pump before operating the pump again.

A canned rotodynamiic flow machine (1) configured for operating with a working fluid such as molten salt of a molten salt nuclear reactor, comprising an impeller (6) arranged in a volute (3), with an inlet (4) and an outlet (5) for the working fluid, an induction or reluctance motor or generator comprising a stator (10) and a rotor (8), a can (18) separating a working fluid area in which the rotor (8) is arranged from a dry area containing the stator (10). The rotor (8) is operably coupled to the impeller (6). The stator (10) comprises stator windings for inducing a magnetic field that penetrates the rotor (8). The stator windings are distributed in slots (11) arranged in the stator (10). The part of the stator windings inside the slots is formed by one or more electrically conductive solid bars (12). An active magnetic bearing for use in a canned rotor dynamic flow machine for a molten salt nuclear reactor, comprising a stator (110,210) and a rotor (108,208). The said stator (108,208) comprises stator windings for inducing a magnetic field that penetrates the rotor (108,208). The stator windings are distributed in one or more slots arranged in the stator. The part of the stator windings inside said one or more slots is formed by one or more electrically conductive solid bars.

A fireproof cover for a stator winding of a stator, in particular of electromotive pumps, comprising two or more fire protection caps. The fire protection caps are made of a flame retardant material and can be placed together in an engagement position. The fire protection caps in the engagement position form a knockout opening for carrying through an iron core of the stator and form such a closed fireproof casing for the stator winding, which, however, is air-permeable through a joining gap between the fire protection caps and/or between at least one fire protection cap and the iron core, that as a result of a coil burn of the stator winding, flying sparks and flame propagation to components lying outside the fireproof casing are prevented.

A locking device comprising at least one load-bearing element, a first locking device engageable in a removable manner with the hollow body to lock it in travel with respect to the load-bearing element, the hollow body being movable in rotation around the axis with respect to the load-bearing element, and second locking device engageable in a removable manner with the support element, the locking device being movable between at least one release configuration and at least one locking configuration, wherein the second locking device engage with the support element to secure the load-bearing element in travel with respect thereto, the hollow body being movable in rotation around the axis with respect to the support element with the locking device in the locking configuration.

An automotive electrical gas pump includes an electronically commutated motor which drives a motor rotor to rotate within a motor can. The motor has a motor stator which comprises at least one static electro-magnetic coil. An electronic circuit board drives the at least one electro-magnetic coil. A mounting frame includes a motor can and a stator bed. The stator bed embeds the motor stator at least in part. The mounting frame is made of a plastic material which includes a thermally high-conductive filler material.

The invention relates to a rotor bearing system (1). Said system comprises a housing (80) in which a first permanent magnet (30) is mounted such that it can rotate about a first axis (105). A rotor (70) for conveying a liquid comprises a second hollow-cylindrical permanent magnet (40), which is mounted such that it can rotate about a second axis. The first permanent magnet (30) and the second permanent magnet (40) overlap axially at least partially, wherein the first permanent magnet (30) is disposed offset relative to the second permanent magnet (40). In the axial overlap region (160) of the first permanent magnet (30) and the second permanent magnet (40), the housing (80) is positioned between the two permanent magnets (30, 40). A first bearing (20) is configured for the relative axial positioning of the rotor (70) and the housing (80) with respect to one another and for receiving an axial force resulting from the arrangement of the first permanent magnet (30) and the second permanent magnet (40), and a second bearing (10) and a third bearing (90) are configured for receiving radial forces and for positioning the axis of rotation of the second permanent magnet (40).

An electric centrifugal pump includes a water pump shell, a water sealing bearing, a water pump impeller, a spring washer, an inner motor cover, a bearing pedestal, a front rotor bearing, a motor stator, a motor rotor, a shaft of the motor rotor, a rear bearing of the motor rotor, a leading impeller, a leading impeller cover, a water pump driving control panel, a controller cover and a motor shell, and an internal forced cooling system is formed by the water inlet cavity of the water pump, an axial through hole of the shaft of the motor rotor, the leading impeller, a leading impeller cavity of the leading impeller, a spiral overflowing hole of the inner motor cover, a rotor cavity, a spiral overflowing hole of the bearing pedestal and the water pump impeller which are sequentially communicated.

The present disclosure provides a micro water pump, including: a pump body having a cavity, an inlet communicating with the cavity, and an outlet communicating with the cavity; a drive mechanism installed on the pump body for driving liquid from the inlet into the cavity and discharging from the outlet. The pump body includes a base, an upper cover engaging with the base for forming the cavity, and a barrier member. The upper cover includes a fixed wall located in the cavity. The barrier member protrudes from the fixed wall for preventing the drive mechanism from colliding and rubbing with the fixed wall during rotation. By virtue of the configuration, improved heat-dissipation performance is performed.