A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.

A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.

A unique low cost and efficient submersible, hermetically sealed, variable speed system intended to drive submersible boosting units. The system includes a unique combination of a liquid filled electrical motor connected to a hydraulic coupling and a magnetic coupling driver section, in a hermetically sealed container, with a magnetic coupling follower driving a booster unit. The system further includes integrated cooling, lubrication and control functionality. The drive unit has an actuating system connected to internal guide vanes which controls the liquid flow between the pump impeller and turbine wheel of the hydrodynamic coupling and hence the torque and speed. The combined system is a sealed seal-less and topside-less submersible drive unit that can operate in harsh subsea environments. The drive unit opens up for use of thin walled pressure casings and low pressure electrical penetrators.

A unique low cost and efficient submersible, hermetically sealed, variable speed system intended to drive submersible boosting units. The system includes a unique combination of a liquid filled electrical motor connected to a hydraulic coupling and a magnetic coupling driver section, in a hermetically sealed container, with a magnetic coupling follower driving a booster unit. The system further includes integrated cooling, lubrication and control functionality. The drive unit has an actuating system connected to internal guide vanes which controls the liquid flow between the pump impeller and turbine wheel of the hydrodynamic coupling and hence the torque and speed. The combined system is a sealed seal-less and topside-less submersible drive unit that can operate in harsh subsea environments. The drive unit opens up for use of thin walled pressure casings and low pressure electrical penetrators.

A unique low cost and efficient submersible, hermetically sealed, variable speed system intended to drive submersible boosting units. The system includes a unique combination of a liquid filled electrical motor connected to a hydraulic coupling and a magnetic coupling driver section, in a hermetically sealed container, with a magnetic coupling follower driving a booster unit. The system further includes integrated cooling, lubrication and control functionality. The drive unit has an actuating system connected to internal guide vanes which controls the liquid flow between the pump impeller and turbine wheel of the hydrodynamic coupling and hence the torque and speed. The combined system is a sealed seal-less and topside-less submersible drive unit that can operate in harsh subsea environments. The drive unit opens up for use of thin walled pressure casings and low pressure electrical penetrators.

A fluid generating apparatus includes a single phase motor including a stator and a rotor rotatable relative to the stator, a fluid generating device including a plurality of blades, and a clutch connected between the rotor and the fluid generating device for transmitting torque from the rotor to the fluid generating device. The clutch includes a resilient member having one end connected to the rotor for rotation with the rotor and the other end connected to the fluid generating device for driving the fluid generating device to rotate.

An electrical submersible pump system for preventing high-pressure drawdown while starting includes a fixed-speed drive, hermetically-sealed motor including a motor shaft extending therefrom, a discharge pump including a pump shaft extending therefrom, and a torque converter interposing the motor and the pump. The torque converter includes a hollow body filled with a conversion fluid, a motor-side rotor mated to an end of the motor shaft and operable generate a vortex of the conversion fluid within the hollow body when the motor shaft is provided with a torque, and a pump-side rotor mated to an end of the pump shaft and rotatable as the vortex impinges on the pump-side rotor, and thereby providing a torque to the pump shaft to operate the discharge pump.