Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.

Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.

An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

The disclosure relates to an electronic pump that can be used in a motor vehicle, particularly for generating hydraulic fluid flow for steering and braking, or to perform auxiliary functions such as dump bodies for garbage trucks or landscape trucks. Methods of operating the system and manufacturing the system are also provided.

A hydraulic pressure supply unit has a storage chamber which stores hydraulic fluid, a hydraulic pump which is arranged within the storage chamber and dips at least partially into the stored hydraulic fluid, and an electric motor which drives the hydraulic pump. The electric motor is arranged below the hydraulic pump in a separate motor chamber which is situated below the storage chamber, is dry, and is not connected fluidically to the storage chamber. The electric motor is coupled in a thermally transmitting manner to a separating floor, the upper side of which delimits the storage chamber and is wetted continuously with stored hydraulic fluid.

A hydraulic pressure supply unit has a storage chamber which stores hydraulic fluid, a hydraulic pump which is arranged within the storage chamber and dips at least partially into the stored hydraulic fluid, and an electric motor which drives the hydraulic pump. The electric motor is arranged below the hydraulic pump in a separate motor chamber which is situated below the storage chamber, is dry, and is not connected fluidically to the storage chamber. The electric motor is coupled in a thermally transmitting manner to a separating floor, the upper side of which delimits the storage chamber and is wetted continuously with stored hydraulic fluid.

An electric drive pump system includes a power end and a detachable transmission assembly. The transmission assembly is mounted to the power end and is configured to provide rotational power to the power end through a plurality of electric motors. The plurality of electric motors use a gearbox to drive an output spline that engages the power end. A control module is used to regulate the performance characteristics of the plurality of electric motors. A temperature regulation assembly is configured to regulate the temperature of the transmission assembly and the power end.

Disclosed herein is an electric power and thermal management system in which, when a shaft is rotated due to an operation of a power part, generation of electric power and a circulation of a fluid are performed together so that the generation of the electric power and a circulation structure of oil are integrated, and thus a layout can be reduced, and a structure can be simplified. In addition, in a state in which the generation of the electric power and the circulation structure of the oil are integrated, a circulation amount of the oil is adjusted according to an angle of an inclined plate constituting a pumping mechanism so that an oversupply of the oil to parts through which the oil is circulated can be prevented.

The piston compressor for compressing a gas having a cylinder and also including a piston, a piston rod, packing, a crosshead and a drive, wherein: the piston is disposed for movement in a longitudinal direction L inside the cylinder; the piston is connected to the crosshead by means of a piston rod; packing is disposed between the piston and the crosshead, through which packing the piston rod runs; the crosshead is driven by the drive; in addition an activatable magnetic bearing is disposed between the piston and the crosshead; the magnetic bearing can generate a magnetic force F.sub.m on the piston rod, at least perpendicularly to the longitudinal direction L; and an activation device activates the magnetic force F.sub.m generated by the magnetic bearing on the piston rod.