A fluid pump includes a pump casing, a motor connected to the pump casing, and an impeller driven by the motor. The motor includes a housing and a stator arranged in the casing. The housing is made of a non-magnetic material. The stator includes a stator iron core and a plurality of windings wound on the stator iron core. The motor further includes a sleeve having a cylindrical main body and a flange extending radially outwards from one end of the main body and fixed to the housing. An annular space is jointly bounded by the sleeve and the housing to accommodate the stator. A part of inner surface of the housing and a part of bottom surface of the flange facing the annular space are coated with a metal coating for electromagnetic wave shielding.

The invention relates to a micromotor (10), the stator of which contains a back iron jacket (18). Said back iron jacket consists of a continuous unslotted sleeve consisting of a metal alloy that contains ferritic iron as the main constituent, up to 30% chromium and preferably aluminium and yttrium oxide. Electric conductivity is reduced by the oxidation of the aluminium. The yttrium oxide performs the same function. The reduced electric conductivity suppresses eddy currents to a great extent. The back iron jacket (18) has a high magnetic conductivity with a small wall thickness, thus increasing the electrical output for a motor with a small diameter.

An electric coolant pump includes a pump housing, an electric motor, and a pump wheel. The pump housing has a pumping chamber and a motor chamber which are separated by a separation sidewall. The pumping chamber has a pump volute which extends from a pump inlet to a pump outlet. A volute cooling sector of the pump volute extends over a volute angle of 120°. The separation sidewall has a cooling section which is defined by the volute cooling sector. The electric motor includes a motor rotor, a motor stator having a stator coil arrangement, and a motor electronics arranged in the motor chamber which energizes the stator coil arrangement. The pump wheel is arranged in the pumping chamber and is connected with the motor rotor. The stator coil arrangement is arranged adjacent to the volute cooling sector and thermally contacts the cooling section of the separation sidewall.

An electric fluid pump may include a pump housing and an electric motor. A rotor may have a rotor shaft and may be mounted in a rotatable manner in a stator body, which may have a stator embedded at least regionally therein. The pump housing may be subdivided into a dry and a wet region containing the rotor. The rotor shaft may be mounted on a bottom side and may be connected to a pump impeller on a pump-impeller side, facing away from the bottom side. The pump housing may have, on the pump-impeller side, an aperture out of which the rotor shaft may project. The pump housing may have an internal first bearing collar arranged around the aperture, the dry region located radially around the first bearing collar, and an outside diameter of the first bearing collar being less than a maximum diameter of the rotor.

An electric pump includes a pump housing, a rotor assembly, a stator assembly, an isolation sleeve, a heat dissipation plate and an electric control board. The pump housing defines a pump inner chamber; the pump inner chamber is partitioned into a first cavity and a second cavity by the isolation sleeve; the rotor assembly is disposed in the first cavity; the stator assembly and the electric control board are disposed in the second cavity; the isolation sleeve comprises a bottom portion; at least a portion of the heat dissipation plate is disposed between the electric control board and the bottom portion; at least a portion of the bottom portion and at least a portion of the heat dissipation plate are in direct contact, or are filled with thermal silicone grease or thermal silica therebetween, or are provided with a thermal patch therebetween.

An electric pump includes: an impeller; a rotor connected to the impeller; a housing accommodating the rotor; divided iron cores surrounding the housing from an outside of the housing; divided coil bobbins respectively attached to the divided iron cores; divided coils respectively wound around the divided coil bobbins; and a bus bar unit including bus bars, wherein the housing includes a bottom wall portion directly or indirectly holding a shaft portion in a standing manner, the shaft portion supports the rotor for rotation, the bottom wall portion overlaps at least a part of the divided coils in an orthogonal direction orthogonal to an axial direction of the rotor, and the bus bar unit is conductively connected to the divided coils and is held by the bottom wall portion.

A pump cartridge comprising an external housing including a lateral wall, a first fin extending from a first side of the lateral wall, and a second fin extending from a second side of the lateral wall. The second side of the lateral wall may be opposite the first side of the lateral wall, such that the fins are on opposite sides of the lateral wall. The pump cartridge may be part of a pumping system further comprised of a chassis comprising a pump basin including an interior side wall, a first tab extending inwardly from the interior side wall, and a second tab extending inwardly from the interior side wall and opposed to the first tab. The first fin of the cartridge is reversibly engageable with the first tab of the chassis and the second fin of the cartridge is reversibly engageable with the second tab of the chassis.

A magnetic drive pump includes a seat unit, a motor unit and a leak detector. The motor unit includes a rotor, an inner case body, an outer case body and a stator. The inner case body has an inner end wall. The outer case body is sleeved on the inner case body and has an outer end wall. The outer end wall cooperates with the inner end wall to define a liquid-receiving space therebetween. The leak detector is disposed on one side of the outer end wall opposite to the liquid-receiving space and includes a sensor for detecting the change of the electrostatic capacity between the liquid-receiving space and the sensor.

A subsea fluid processing system includes an electric motor that rotates a shaft on which impellers are fixedly mounted. Diffusors are static and fixed to the pump housing. The electric motor includes a rotor surrounding the shaft and a stator that is filled with a dielectric stator fluid. The stator is sealed or “canned.” The inner surface of the stator which faces the rotor is canned with a canning non-metallic material. The motor, as well as bearings for the rotating shaft are lubricated and cooled with a fluid that in some cases is taken from the process fluid and some alternative source. Alternative sources include: MEG, methanol, treated seawater and untreated seawater.

A subsea fluid processing system includes an electric motor that rotates a shaft on which impellers are fixedly mounted. Diffusors are static and fixed to the pump housing. The electric motor includes a rotor surrounding the shaft and a stator that is filled with a dielectric stator fluid. The stator is sealed or “canned.” The inner surface of the stator which faces the rotor is canned with a canning non-metallic material. The motor, as well as bearings for the rotating shaft are lubricated and cooled with a fluid that in some cases is taken from the process fluid and some alternative source. Alternative sources include: MEG, methanol, treated seawater and untreated seawater.