The invention relates to a thrust washer (28) for an electric machine (10, 12) intended to be arranged on a shaft (16) between a bearing (18) and a rotor (14), preferably a rotating electrical contact element (24) impacted by brushes (38), and/or a disk pack (36) of the rotor (14). The thrust washer (28) is provided with an area for sealing having two end faces (32, 34). On each end face (32, 34), at least one radial abutment section (50, 52) for the bearing (18), or the rotor (14), is provided. The thrust washer (28) according to the invention is characterized in that it is made of at least one hard component (54) and one soft component (56), wherein the part of the radial abutment section (50, 52) abutting the rotor (14) and/or the bearing (18) is formed by the soft component (56).

An electric water pump includes: a housing with a cooling water inlet and a cooling water outlet; a stator assembly provided inside the housing and having stator coils on upper and lower surfaces thereof, respectively; a rotor assembly including a rotary shaft rotatably supported on the housing, a first magnetic body provided at an upper portion of the stator assembly, and a second magnetic body provided at a lower portion of the stator assembly; and an impeller provided to rotate integrally with the rotary shaft of the rotor assembly.

The fan scrubber is provided with a casing having a gas draw-in port and a gas ejection port, a fan disposed in the casing, a nozzle from which a liquid is jetted into the casing, and a canned motor connected to the fan. The canned motor has a main shaft connected to the fan, a rotor which rotates integrally with the main shaft, a stator disposed on the periphery of the rotor, a motor casing in which the rotor and the stator are housed, and a can which partitions the interior of the motor casing into a rotor chamber in which the rotor is disposed and a stator chamber in which the stator is disposed.

A turbomachine, in particular for a fuel cell system of a vehicle, such as a utility vehicle, has a rotor shaft, an expander wheel fastened on the rotor shaft, and an air bearing arrangement, which is configured to support the rotor shaft rotatably about a rotor axis, wherein a flow path is formed between the expander wheel and the air bearing arrangement. A flow generator is arranged in the flow path between the air bearing arrangement and the expander wheel and configured to generate, depending on a rotation of the rotor shaft, an air flow directed toward the expander wheel, for the purpose of building up a blocking pressure.

A refrigerant circulation system which circulates CO.sub.2-containing refrigerant therethrough includes a compressor which compresses the refrigerant, a motor, a motor speed sensor which detects a rotational speed of the motor, and a control device which controls at least the motor. The motor includes a rotor, a stator, a rotation shaft coupled to the rotor, and slide bearings supporting the rotation shaft and being lubricated using the refrigerant compressed by the compressor, and is configured so that the refrigerant passing through the motor expands after flowing out of the slide bearings and is used for cooling one of the rotor and the stator. The motor further includes a flow rate adjustment mechanism which adjusts a flow rate of the refrigerant. The control device controls the flow rate adjustment mechanism to adjust the flow rate of the refrigerant according to the rotational speed detected by the motor speed sensor.

A bearing unit that supports a rotating shaft includes: a frame including a tubular body; a bearing disposed in the frame; and a pressing spring that is disposed in the frame and presses the bearing, the pressing spring including a protrusion as a positioning part that comes into contact with an inner surface of the tubular body of the frame to determine a position of the pressing spring.

A motor bearing system has: a slide bearing operable as a gas-lubricated bearing by gas supplied from a pump; a rolling bearing; a switching mechanism switching between the slide bearing and the rolling bearing; and a controller. When a motor rotation speed is lower than a first speed, the controller controls the switching mechanism to apply the rolling bearing. When the motor rotation speed is equal to or higher than the first speed and lower than a second speed, the controller controls the switching mechanism to apply the slide bearing and controls the pump to operate the slide bearing as a gas-lubricated bearing. When the motor rotation speed is equal to or higher than the second speed, the controller controls the switching mechanism to apply the slide bearing and stops the pump.

An energy dissipation system for a vehicle, the energy dissipation system comprising an air compressor comprising a compressor inlet configured to receive ambient air, an electric motor comprising a rotor having a rotor shaft operatively connected to a compressor shaft of the air compressor, power electronics arranged in a power electronics housing, the power electronics being electrically connected to the electric motor and configured to feed electric power to the electric motor, and an air flow channel through which the ambient air is configured to be fed to the compressor inlet, the air flow channel being formed by an inner elongated tube member and an outer elongated tube member, wherein the electric motor is housed within the inner elongated tube member and attached to a first inner surface, and wherein the power electronics housing is attached to a second outer surface.

In a motor cooling system that cools a motor by using a refrigerant in which oil is contained in CO.sub.2, the oil in the motor is reliably discharged. The motor cooling system mounted on a vehicle includes a compressor for compressing the refrigerant in which the oil is contained in CO.sub.2; a heat exchanger for cooling the refrigerant compressed by the compressor; the motor for driving the vehicle; refrigerant passages for supplying the refrigerant cooled by the heat exchanger into the motor; and a controller controlling the compressor, and the controller controls the compressor to generate the refrigerant in a supercritical state such that the refrigerant in the supercritical state is supplied from the refrigerant passage into the motor when a supercritical refrigerant supply condition is satisfied.

A motor system includes a motor, a slide bearing supporting a rotation shaft of the motor, an oil passage and a refrigerant passage for respectively supplying oil and a refrigerant (a CO.sub.2 refrigerant) into the slide bearing to lubricate the slide bearing, a refrigerant passage for supplying the refrigerant into the motor to cool the motor, and a seal that is supplied with oil and uses the oil to seal a gap between a portion of the rotation shaft extending outward from a housing of the motor. The oil passage supplies the oil to a position on the seal side in an axial direction in the slide bearing, and the refrigerant passage supplies the refrigerant to a position on the rotor side in the axial direction in the slide bearing.