A bearing includes a thrust gas bearing attached to a journal bearing and two or more converging-diverging orifices defined in a surface of at least one of the thrust gas bearing and the journal bearing. The converging-diverging orifices supply at least one pressurized gas to an interior of the bearing. Hydrodynamic lifting grooves are provided on the faces of the thrust gas bearing and the journal bearing and provide improved load capacity and sealing capabilities. Control over the ratios of the pressurized gases provides for additional sealing capabilities and reduced leakage. A metal mesh damper provides increased damping of the gas bearing.

A sliding element for an engine may include a polymer-based overlay layer and a metallic substrate. The polymer-based overlay layer may include a polymer-based matrix, a metal particulate, and a pigment. The pigment may have a hardness of at least 4 on the Mohs hardness scale.

Systems and methods for increasing hydrocarbon production using an electrical submersible pump are described. The methods typically include, for example, configuring an electrical submersible pump comprising a gas separator to induce a gas lift effect in a well comprising a tubing within a casing. Hydrocarbon production from the well is therefore increased using the electrical submersible pump.

A joint for the angularly adjustable drive-connection of a cylinder block and a driveshaft of a hydrostatic bent axis piston unit. The joint has a shank which is rotatable about its longitudinal axis defining a joint axis, on both ends of the shank roller carriers project radially and basically perpendicular to the joint axis. On each roller carrier a roller is provided rotatable around a roller axis. The rollers are secured in axial direction against slipping-off of the roller carriers by means of an embossed area located axially outside of the roller on the respective distal end portion of the roller carrier.

A thrust magnetic bearing integrated with an induction machine and methods for using the same for slow roll control of rotors and other rotating components is provided. The rotor can include a shaft and a thrust bearing disk. The thrust magnetic bearing can include thrust bearing stators positioned axially adjacent to the thrust bearing disk and they can be configured to apply axial magnetic forces to the thrust bearing disk. The induction machine can be configured to generate a rotating magnetic field that causes a torque to be applied to the thrust bearing disk in a predetermined rotational direction. In one aspect, the induction machine can include a radial stator positioned adjacent to a circumference of the thrust bearing disk and two or more circumferentially offset windings. In another aspect, the induction machine can position the two or more circumferentially offset windings on the thrust bearing stators.

A hydraulic piston machine including a housing, a shaft that is able to rotate relative to the housing, and a cam secured to one of the housing or the shaft. A cylinder block includes pistons that are able to move in the cylinder block opposite the cam in order to generate relative rotation between the cylinder block and the cam. The cylinder block is linked in rotation to the other of the shaft or the housing. A mechanism forms rotation guide bearings for guiding the rotation of the shaft relative to the housing, which mechanism includes a tapered plain bushing interposed between a housing element and an element linked in rotation with the shaft and in which the tapered plain bushing includes a radial through-slit extending through the entire radial dimension of the bushing.

A damper includes: cylindrical damper body, damper body including inner ring and outer ring located concentrically, arc springs located side by side in circumferential direction between inner and outer rings, and slits that separate inner ring, outer ring, and arc springs; sealers on both sides of damper body in axial direction, sealers including sealing surfaces, sealing surfaces facing open ends of slits in axial direction, with gaps between sealing surfaces and open ends of slits; and viscous fluid that fills slits and gaps. Arc springs include first arc spring and second arc spring located side by side in circumferential direction. Each slit includes: inner slit portion that separates first arc spring and inner ring; outer slit portion that separates second arc spring and outer ring; connecting portion that connects inner slit and outer slit portions. Connecting portion includes restrictor that restricts viscous fluid movement between inner and outer slit portions.

A thrust air bearing includes a plurality of foil units arranged in a circle. Each foil unit includes a top foil portion, and a bump foil portion integrally provided with the top foil portion and disposed opposite the top foil portion in a circumferential direction forming the circle. The foil unit is disposed such that the top foil portion lies on top of the bump foil portion of another adjacent foil unit.

A bearing housing is configured as an end-side cover for a nacelle of a fluid-flow power plant and includes a cylindrical section having an interior and a bearing unit in the interior. The bearing unit includes at least one rolling-element bearing having an inner ring and an outer ring rotatably disposed with respect to each other about a bearing rotational axis and a plurality of rolling elements between the rings. A pressure line of the bearing intersects the bearing rotational axis at a first angle. An angled section of the housing extends from the cylindrical section of the housing at a second angle that is related to, and preferably substantially equal to, the first angle.

An apparatus is provided for providing access to one or more axial proximity probes for monitoring axial position of thrust collars of a pump shaft to enable improved adjustment of the axial proximity probes by the pump operator. The apparatus includes a plurality of side walls configured to surround one or more axial proximity probes configured to measure axial position of one or more thrust collars in a pump bearing housing, at least one access window formed through at least one side wall of the apparatus configured to provide access the one or more axial proximity probes and at least one removable access plate configured to cover the at least one access window.