A motor oil pump assembly includes: a motor component; an oil pump component, where the oil pump component is supported on an end cover of the motor component; an inner sound insulation enclosure, where the inner sound insulation enclosure encloses the oil pump component, and the inner sound insulation enclosure and the oil pump component define an inner sound insulation cavity filled with low-pressure oil; and a pre-tightening buffering component, where the pre-tightening buffering component is pressed between an upper end cover of the oil pump component and the inner sound insulation enclosure, and the pre-tightening buffering component is in communication with a high-pressure cavity of the oil pump component.

An oil pump for an engine is disclosed. The oil pump may include a first pump mechanism configured to supply oil to a main lubrication gallery of the engine, and a second pump mechanism configured to supply oil to a piston cooling gallery of the engine. The first pump mechanism may be designed for a first type of engine and the second pump mechanism may be designed for a second type of engine. The first type of engine may have a greater quantity of cylinders than the second type of engine.

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate.

A screw spindle pump for delivering a cooling liquid for cooling a battery and/or power electronics or a cleaning or supply liquid of a motor vehicle, including a housing in which a working spindle, which is coupled to a drive assembly, and at least one running spindle, which meshes with the latter, are accommodated, and including a feather key-like support element, which is fixed by the housing and against which the working spindle and the running spindle are axially supported. In the housing, there is provided at least one aperture through which it is possible to insert the support element, which, in the assembled position, is received with one end in the aperture and with the other end in a receiving part situated diametrically opposite the aperture, wherein the support element is secured via at least one securing element which closes the aperture at the outside.

A high speed, rotary lobe gear pump assembly is provided which combines a positive displacement lobe gear pump having wipers with a centrifugal pump utilizing an impeller. The centrifugal pump feeds high pressure fluid flow directly into the lobe gear pump allowing the gear pump to rotate at high speeds without cavitation. The high speed capability of the pump assembly allows the lobe gear pump to operate without speed reduction gearing for the motor shaft.

A fluid-driven actuator system includes a fluid-driven actuator and at least one proportional control valve and at least one pump connected to the fluid-driven actuator to provide fluid to operate the fluid-driven actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The fluid driven actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to adjust at least one of a flow in the fluid system to a flow set point and a pressure in the fluid system to pressure set point and a concurrently establishes an opening of the at least one proportional control valve to adjust at least one of the flow to the flow set point and the pressure to the pressure set point.

A screw spindle pump, comprising a pump housing having a lead screw received therein and at least one running spindle which meshes with said lead screw, as well as a connector housing which is placed onto the pump housing and has a suction connector and a pressure connector, the two latter fluidically communicating with a suction inlet and a pressure outlet of the pump housing, wherein the connector housing is composed of a first housing part and a second housing part, one of the two latter having the suction connector and the other having the pressure connector, both said housing parts being rotatable relative to the pump housing and both being rotatable relative to one another.

The present invention relates to a fixed displacement pump for use for conveying a hydraulic fluid in a closed hydraulic circuit, a closed hydraulic circuit, a construction machine and a method for operating a fixed displacement pump in a closed hydraulic circuit.

The present invention relates to a fixed displacement pump for use for conveying a hydraulic fluid in a closed hydraulic circuit, a closed hydraulic circuit, a construction machine and a method for operating a fixed displacement pump in a closed hydraulic circuit.

A system may be provided that may include a first working fluid compressor configured to pressurize a working fluid, and a prime mover coupled to the first working fluid compressor and configured to provide a mechanical input into the first working fluid compressor. An exhaust assembly may be coupled to the prime mover and configured to receive exhaust heat from the prime mover, the exhaust assembly including a generator configured to generate electric current based on the exhaust heat received by the exhaust assembly. A second working fluid compressor may include an electric motor electrically and synchronously coupled to the generator and configured to pressurize the working fluid.