A bullhead-shaped grooved diversion jet and empennage swing vibration suppression device and method. The device consists of an impeller diversion module and a drainage rotary cover module. The impeller diversion module consists of a center impeller, sleeve bearings, small impellers, and small impeller rotating shafts. The drainage rotary cover module consists of a drainage front cover, a perforated jet rear cover, and empennages. The device is mounted on an outer wall of a riser in a sleeving manner. Under a combined action of drainage and space allocation of horizontal rectangular grooves, flow rate distribution of the center impeller, flow direction adjustment of the small impellers, diversion of lateral diversion holes, jet flows of side rear reducing holes, flowing space division and wake vortex turbulence of rotary swinging empennages, around-flow boundary layers at two sides and a tail of the riser are deeply damaged, which suppresses the formation of large vortexes.

A propeller, impeller or mixer comprising at least one blade, the blade having a suction surface and a pressure surface which extend from a leading edge to a trailing edge of the blade and a radially-outer tip region, wherein five to one hundred duct openings are provided extending through the at least one blade from the pressure surface to the suction surface, the duct openings being grouped in the tip region of the blade.

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.

Embodiments are directed toward an engine. In some embodiments, the engine includes a water pump and a balancer shaft. In some embodiments, the water pump has a plain bearing. In some embodiments, plain bearing is supplied with pressurized oil. In some embodiments, the balancer shaft drives the water pump as well as cam shafts.

An electric submersible pump (ESP) assembly. The ESP assembly comprises a first actuator having a first member that is configured to extend and retract radially with respect to a central axis of the ESP assembly in response to receiving a control input, wherein the first actuator is mechanically coupled to an electric motor, to a seal section, or to a centrifugal pump of the ESP assembly.

A computer-implemented method for controlling one or more components of a water utility system, the water utility system comprising at least one pump assembly, the method comprising: receiving a user indication indicative of a user-perceived acoustic-noise induced discomfort experienced at least at a first location, measuring at least a first sound signal at said first location, determining, based on the measured first sound signal and based on at least one of a received user indication of a degree of the user-perceived acoustic-noise induced discomfort and a received first operational parameter of the pump assembly, the first operational parameter being representative of an operational condition of the pump assembly at the time of said measuring the first sound signal, one or more adjusted control parameters of the water utility system, and controlling the water utility system based on the determined adjusted control parameters.

A fuel supply device includes: a sub-tank to be fixed on a bottom of a fuel tank, the sub-tank temporarily storing fuel in the fuel tank, an upper side of the sub-tank having an opening; a bracket attached to an opening side of the sub-tank; an electric pump that pumps up the fuel in the sub-tank and supplies the fuel to outside of the sub-tank; and multiple fitting portions arranged on an outer edge of the bracket and to fix the bracket to the sub-tank by being fitted to a plurality of receiving portions arranged on the opening of the sub-tank.

A coolant pump assembly includes an electric coolant pump for a motor vehicle. The electric coolant pump includes a multi-part pump housing and an electric drive unit arranged in the multi-part pump housing. The multi-pat housing includes a coolant inlet, a coolant outlet, and a fastening assembly via which the electric coolant pump is detachably connected in an engine compartment to an engine component and/or to a body part. The fastening assembly includes at least one screw connection and at least one interlocking connection.

A submersible electric machine for transporting a liquid, the machine having a hydraulic unit with an impeller, and a drive unit with a housing defining a motor compartment having an electric motor inside. A drive shaft is connected to the electric motor, and extends from the electric motor to the hydraulic unit to a connection with the impeller. A top unit includes a housing defining an electronics chamber separated from the motor compartment by a dividing structural wall. The electronics chamber has a metal partition, having a natural frequency equal to or more than 500 Hz, connected to the top unit housing. A vibration sensor is directly or indirectly connected to the metal partition and monitors vibrations in at least two dimensions at frequencies ranging up to 500 Hz.

A multiphase pump for conveying a multiphase process fluid includes a pump housing, a rotor and a radial bearing. The rotor is arranged in the pump housing and is configured to rotate about an axial direction. The radial bearing has a support carrier and a support structure to support the rotor with respect to a radial direction. The rotor includes a pump shaft and an impeller fixedly mounted on the pump shaft to convey the process fluid from a pump inlet to a pump outlet. A squeeze film damper is provided to reduce vibrations of the rotor, the squeeze film damper arranged around the support structure of the radial bearing, and having an radially outer surface. A damping gap is arranged between the support structure of the radial bearing and the radially outer surface of the squeeze film damper. The damping gap is configured to receive a damping fluid.