A rolling bearing having an inner raceway and an outer raceway and a plurality of rolling elements arranged therebetween. The rolling bearing is media-lubricated or oil-free lubricated. The lubricant forms an elasto-hydrodynamic lubricant film between the rolling elements and the raceways. At first use of the rolling bearing, at least one surface of the rolling bearing is coated with a protective fluid, preferably an oil-based preservative fluid. Also, a refrigerant compressor having such a rolling bearing.

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 magnetic bearing (20) has: a rotor (22) to be supported for rotation about an axis (502); and a stator (24) extending from a first end (30) to a second end (32). The stator has: a circumferential outer winding (50); a circumferential inner winding (52); a radial spacing (54) between the inner winding and the outer winding; a plurality of laminate teeth (84A, 84B, 86A, 86B); and a plurality of radial windings (34A, 34B, 36A, 36B) respectively encircling a respective associated tooth of the plurality of teeth. A plurality of magnetic flux paths are respectively associated with the plurality of radial windings and pass: radially through the associated winding; axially through the radial spacing; radially from the radial spacing to the rotor; and axially along the rotor.

A compressor having curved connecting rods, comprising cylinders (8), pistons (9), piston pins (10), curved connecting rods (11), a swing rod (12), a crank pin (13), a crankshaft (14) and the other components; when the compressor having curved connecting rods works, a power machine driving the crankshaft (14) to rotate, the rotation of the crankshaft (14) driving the crank pin (13) to push the swing rod (12) to swing left and right, and the movement, towards the left and right, of the swing rod (12) driving the curved connecting rods (11) and the pistons (9) to reciprocate within the cylinders (8) and perform work in a compression manner.

A bearing support (26) for a compressor (10) includes an annular body. The annular body includes a circle opening (28) that is configured to receive a bearing (21) and a shaft (20). A tapered portion (30) is tapered away from the circular opening. The tapered portion (30) includes a passage (32). A vibration sensor (34) is situated in the passage. A compressor and a method of sensing vibration adjacent a bearing in a compressor are also disclosed.

A thrust foil bearing of this disclosure includes: a base plate provided with an insertion hole through which a rotation shaft is inserted; a corrugated bump foil placed around the insertion hole and supported by the base plate; and a top foil which is supported by the bump foil, and in which one side in a circumferential direction of the insertion hole is attached to the base plate and the other side in the circumferential direction of the insertion hole is a free end, and in the thrust foil bearing, a bent portion which is bent toward the base plate is formed on the other side of the top foil in the circumferential direction.

Non-Volume displacement pumps used at nuclear power plants (NPP) in reactor coolant pump sets for the primary coolant circuit of the nuclear power system. The reactor coolant pump set comprising a vertical vane-type single-stage pump with bottom arrangement of the impeller, the pump shaft is connected to the electric motor shaft by a rigid coupling, the radial-axial bearing, installed in the electric motor upper chamber, is made of two main elements: a radial bearing made in the form of a rotor metallic bushing installed on the cylindrical part of the collar and an axial bearing consisting of two stator lever-type balance arm systems with cover plates of antifriction material and rotor cover plates of antifriction material. The radial-axial bearing is cooled by water from the NPP system, pressure head whereof is increased by the screw-type pump located on the upper butt of the radial-axial bearing collar.

An axial bearing for absorbing high axial loads of a shaft has a support structure and a load transmission device for transmitting the load from the shaft to the support structure. The support structure includes a bearing plate, a plurality of spring elements, and a plurality of bearing shoes. The spring elements are supported on the bearing plate and arranged in groups, and each group of spring elements being covered by a bearing shoe. The load transmission device is firmly connected to the shaft and has a tracking ring which is arranged such that the tracking ring can rotate on the bearing shoes. The bearing plate and the tracking ring are in each case arranged concentrically with the shaft, and the axial bearing has an advantageously designed measuring device for measurement of the mean distance between the bearing plate and a bearing shoe.

A magnetic bearing (20; 220; 320) comprises: a rotor (22; 322) to be supported for rotation about an axis (502); a stator (24; 224) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (50); one or more second permanent magnets (52) axially spaced from the one or more first permanent magnets; one or more intermediate permanent magnets (60; 230; 232) axially between the one or more first permanent magnets and one or more second permanent magnets; laminate teeth (64A, 64B, 66A, 66B) radially inward of the one or more intermediate permanent magnets; and a plurality of radial windings (34A, 34B, 36A, 36B), respectively encircling a respective associated tooth of the plurality of teeth.

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.