The present invention provides a vertical, axial flow oil pump (10). The oil pump includes: a casing (11), the casing having a cylindrical shape as a whole and being able to rotate around its own central axis (O); a suction port (12), located at a lower end of the casing in an axial direction, and configured to suck oil into the oil pump; a discharge port (13), located at an upper end of the casing in the axial direction, and configured to discharge the oil from the oil pump to outside; and an impeller (14), provided in and formed integrally with the casing. The impeller rotates together with the casing when the casing rotates, so that the oil is flowed from the suction port to the discharge port. The present invention also provides a scroll compressor having the oil pump.

A fluid pump, in particular an oil pump, for supplying a clutch actuator, a gearbox actuator, a lubrication system, and/or a cooling system of a drive train, includes a pump unit, an electrical drive unit, and a one-piece sealing element. The pump unit is arranged in a first housing part of the fluid pump, and the electrical drive unit is arranged in a second housing part of the fluid pump. The one-piece sealing element seals the first housing part against the second housing part, and seals the first housing part against a housing cover arranged on a side opposite the second housing part. Furthermore, a method for producing such a fluid pump includes arranging a pump unit in a first housing part of the fluid pump and moulding a sealing element onto the first housing part.

A fluid pump, in particular an oil pump, for supplying a clutch actuator, a gearbox actuator, a lubrication system, and/or a cooling system of a drive train, includes a pump unit, an electrical drive unit, and a one-piece sealing element. The pump unit is arranged in a first housing part of the fluid pump, and the electrical drive unit is arranged in a second housing part of the fluid pump. The one-piece sealing element seals the first housing part against the second housing part, and seals the first housing part against a housing cover arranged on a side opposite the second housing part. Furthermore, a method for producing such a fluid pump includes arranging a pump unit in a first housing part of the fluid pump and moulding a sealing element onto the first housing part.

A high pressure engine propulsion system, such as a rocket engine, having improved engine performance is described herein. A liquid propellant, such as liquid oxygen, is paramagnetic. Cavitation bubbles of the liquid propellant can form in an inducer tunnel of a turbopump when the pressure in the turbopump inlet drops below the vapor pressure of the liquid propellant. The turbopump includes a magnetic field source external to the inducer tunnel to generate or provide a steady magnetic field across or through the inducer tunnel. The steady magnetic field interacts with the paramagnetic propellant, thereby reducing or eliminating cavitation bubble growth, causing cavitation bubbles to collapse, retaining cavitation bubbles within the inducer tunnel, the like, or combinations thereof.

A high pressure engine propulsion system, such as a rocket engine, having improved engine performance is described herein. A liquid propellant, such as liquid oxygen, is paramagnetic. Cavitation bubbles of the liquid propellant can form in an inducer tunnel of a turbopump when the pressure in the turbopump inlet drops below the vapor pressure of the liquid propellant. The turbopump includes a magnetic field source external to the inducer tunnel to generate or provide a steady magnetic field across or through the inducer tunnel. The steady magnetic field interacts with the paramagnetic propellant, thereby reducing or eliminating cavitation bubble growth, causing cavitation bubbles to collapse, retaining cavitation bubbles within the inducer tunnel, the like, or combinations thereof.

Embodiments include a hydraulic fracturing system for fracturing a subterranean formation. The system includes an electric pump, arranged on a first support structure, the electric pump coupled to a well associated with the subterranean formation and powered by at least one electric motor, and configured to pump fluid into a wellbore associated with the well at a high pressure so that the fluid passes from the wellbore into the subterranean formation and fractures the subterranean formation. The system also includes support equipment, arranged on a second support structure, electrically coupled to the electric pump, wherein the support equipment includes at least a transformer for distributing power to the electric pump, the power being received from at least one generator at a voltage higher than an operating voltage of the electric pump.

A liquid propellant rocket engine includes a main turbo-pump and a boost turbo-pump. The main turbo-pump has a main pump with an outlet that is fluidly coupled with a supply line. The boost turbo-pump includes a housing, a rotor, a boost pump, and a turbine. The boost pump includes a first portion of the housing and a first portion the rotor. The turbine includes a second portion of the housing and a second portion of the rotor. The turbine has turbine blades attached to the second portion of the rotor and an inlet fluidly coupled with the supply line. The turbine has a plurality of circumferentially disposed feed lines defined by the second portion of the housing and not the first portion of the housing. The feed lines are fluidly coupled between the inlet and the turbine blades. The feed lines have an acute angle turn.

A liquid propellant rocket engine includes a main turbo-pump and a boost turbo-pump. The main turbo-pump has a main pump with an outlet that is fluidly coupled with a supply line. The boost turbo-pump includes a housing, a rotor, a boost pump, and a turbine. The boost pump includes a first portion of the housing and a first portion the rotor. The turbine includes a second portion of the housing and a second portion of the rotor. The turbine has turbine blades attached to the second portion of the rotor and an inlet fluidly coupled with the supply line. The turbine has a plurality of circumferentially disposed feed lines defined by the second portion of the housing and not the first portion of the housing. The feed lines are fluidly coupled between the inlet and the turbine blades. The feed lines have an acute angle turn.

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a subject's left ventricle. A frame is disposed around the impeller, the frame defining generally-cylindrical central portion, and a proximal conical portion that widens from a proximal end of the frame to a proximal end of the generally-cylindrical central portion. A motor drives the impeller to pump blood from the left ventricle to the subject's aorta, by rotation of the impeller. The impeller is configured to be disposed at least partially within the proximal conical portion of the frame during at least some of a time during which the impeller rotates. Other applications are also described.

Apparatus and methods are described including a ventricular assist device that includes an impeller configured to be placed inside a subject's left ventricle. A frame is disposed around the impeller, the frame defining generally-cylindrical central portion, and a proximal conical portion that widens from a proximal end of the frame to a proximal end of the generally-cylindrical central portion. A motor drives the impeller to pump blood from the left ventricle to the subject's aorta, by rotation of the impeller. The impeller is configured to be disposed at least partially within the proximal conical portion of the frame during at least some of a time during which the impeller rotates. Other applications are also described.