A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.

The present invention relates to a pump apparatus. The pump apparatus includes: an impeller (1) in which a permanent magnet (5) is embedded; a pump casing (2) which houses the impeller (1); a motor stator (6) having a plurality of stator coils (6B); a motor casing (3) which houses the motor stator (6); a bearing assembly (10) which supports the impeller (1); a vibration sensor (30) for detecting a vibration of the bearing assembly (10); and a controller (29) connected to the vibration sensor (30). The controller (29) calculates the rate of change in the vibration based on the vibration detected by the vibration sensor (30) and, when the rate of change in the vibration is higher than a predetermined threshold value, performs at least one of an operation to stop the supply of electric current to the motor stator (6) and an operation to trigger an alarm.

A motor vehicle system device having a drive assembly, to which a charging device is assigned, has a compressor having at least one compressor runner supported using at least one bearing, the bearing having a stationary first bearing part and a second bearing part that is operatively connected to the compressor runner. An overpressure source is connected to the bearing, using which an overpressure is able to be produced in a bearing gap that is present between the first bearing part and the second bearing part. The overpressure source is the compressor and/or a part of a tandem pump, which besides the overpressure also makes available low air pressure for a user of the motor vehicle system device. The invention also relates to a method for operating a motor vehicle system device.

A motor vehicle system device having a drive assembly, to which a charging device is assigned, has a compressor having at least one compressor runner supported using at least one bearing, the bearing having a stationary first bearing part and a second bearing part that is operatively connected to the compressor runner. An overpressure source is connected to the bearing, using which an overpressure is able to be produced in a bearing gap that is present between the first bearing part and the second bearing part. The overpressure source is the compressor and/or a part of a tandem pump, which besides the overpressure also makes available low air pressure for a user of the motor vehicle system device. The invention also relates to a method for operating a motor vehicle system device.

A bearing assembly for an electrical motor of an ESP pump assembly comprising an outer bearing sleeve with an inner surface and an anti-rotation device rotationally coupling the outer sleeve to a stator and an inner bearing sleeve with an outer surface and an anti-rotation device coupling the inner bearing sleeve to a drive shaft. A fluid film gap located between the outer surface and the inner surface generates a high pressure zone and a low pressure zone in response to a rotational motion of the inner bearing sleeve relative to the outer bearing sleeve. The high pressure zone generates a fluid exit zone and the low pressure zone generates a fluid inlet zone for the working volume of fluid within the fluid film gap. A fluid supply path with ports at the sides of the bearing can exchange a volume of cooling fluid with the volume of working fluid within the fluid film.

A bearing assembly for an electrical motor of an ESP pump assembly comprising an outer bearing sleeve with an inner surface and an anti-rotation device rotationally coupling the outer sleeve to a stator and an inner bearing sleeve with an outer surface and an anti-rotation device coupling the inner bearing sleeve to a drive shaft. A fluid film gap located between the outer surface and the inner surface generates a high pressure zone and a low pressure zone in response to a rotational motion of the inner bearing sleeve relative to the outer bearing sleeve. The high pressure zone generates a fluid exit zone and the low pressure zone generates a fluid inlet zone for the working volume of fluid within the fluid film gap. A fluid supply path with ports at the sides of the bearing can exchange a volume of cooling fluid with the volume of working fluid within the fluid film.

An electric submersible pump is provided which has improved vibrational characteristics relative to conventional electric submersible pumps. The improved electric submersible pumps comprise an electric motor mechanically coupled to a pumping section. The improved vibrational characteristics of the electric submersible pump are attributed to the presence of one or more rotor bearings selected from the group consisting of herringbone patterned rotor bearings, pressure dam rotor bearings, circumferential groove rotor bearings, and combinations of two or more of any of the foregoing rotor bearings.

An electric submersible pump is provided which has improved vibrational characteristics relative to conventional electric submersible pumps. The improved electric submersible pumps comprise an electric motor mechanically coupled to a pumping section. The improved vibrational characteristics of the electric submersible pump are attributed to the presence of one or more rotor bearings selected from the group consisting of herringbone patterned rotor bearings, pressure dam rotor bearings, circumferential groove rotor bearings, and combinations of two or more of any of the foregoing rotor bearings.

A press-fit thrust bearing system and apparatus. A press-fit thrust bearing for an electric submersible pump includes a protruding band extending around a midsection of a bushing, the protruding band extending inward towards a drive shaft, outward towards a diffuser, or both. When extending outwardly, the band is press-fit into the diffuser to prevent dislodgment of the bushing. A non-rotating guide sleeve extends around the bushing above the protruding band, the guide sleeve interlocking with the protruding band to prevent rotation of the bushing. The guide sleeve includes a projection, the protruding band has a channel and the projection mates with the channel to form the interlock. A pair of flanged, rotatable bearing sleeves extend inwards of the single bushing and are keyed to the drive shaft. The top and bottom faces of the bushing serve as thrust handling surfaces.

A fuel pump includes a pump cover at one end portion of the housing, a cover end at the other end portion of the housing, a bearing supported by the cover end and rotatably supporting an end portion of the shaft on the cover end-side. The cover end includes a base part that covers the other end portion, a discharge part that is connected to the base part, a bearing accommodating part which is formed such that a cross-section of the bearing accommodating part perpendicular to a rotation axis of the shaft has an annular shape and which includes an accommodating space accommodating the bearing, and a connection part that connects together the base part and the bearing accommodating part. A length of the connection part is shorter than a length of the base part and a length of the bearing accommodating part, in a direction of the rotation axis.