A pivot (14) with a longitudinal axis (Y) for a bearing of a mechanical reduction gear, comprising a first annular part (14a) including an axial passage (17) and a second annular part (14b) mounted around the first annular part (14a), the first annular part (14a) delimiting with the second annular part (14b) a lubrication circuit at least one oil inlet (20) of which opens out inwards of the first annular part (14a) into the axial passage (17) and at least one oil outlet (28) of which opens radially outwards of the second annular part (14b).

A compressor includes a housing, a shaft that is rotated relative to the housing to compress a working fluid, and a foil bearing that supports the shaft. The foil bearing includes a top foil. The foil bearing is a foil gas bearing that is backed up by a ball bearing, or a mesh foil bearing with an actuator to compress a wire mesh dampener. A heat transfer circuit includes a compressor and a working fluid. The compressor includes a shaft that is rotated to compress the working fluid, and a foil bearing for supporting the shaft as it rotates.

A pivot (14) with a longitudinal axis (Y) for a bearing of a mechanical reduction gear, comprising a first annular part (14a) including an axial passage (17) and a second annular part (14b) mounted around the first annular part (14a), the first annular part (14a) delimiting with the second annular part (14b) a lubrication circuit at least one oil inlet (20) of which opens out inwards of the first annular part (14a) into the axial passage (17) and at least one oil outlet (28) of which opens radially outwards of the second annular part (14b).

The invention relates to a rotor (4) for an air supply unit (1) of a fuel cell unit, which rotor is to be rotatably mounted in a housing (5) of the air supply unit (1) by means of foil-air bearings (15, 16). According to the invention, at least portions of the rotor (4) are formed of a carbon graphite material or of a synthetic-resin-bonded carbon fiber material or coated therewith. The invention also relates to an air supply unit (1) having a rotor (4) of this type.

An electromagnetic actuating device. The device includes an electromagnetic coil including a central recess extending in an axial direction, a cylindrical pole tube inserted into the central recess and provided with a magnetic separation point, an armature situated displaceably in the pole tube, the armature being movable by an actuation of the electromagnetic coil, the armature being mounted in the pole tube in a sleeve-shaped bearing foil inserted into the pole tube, the bearing foil including an inner side facing toward the armature and used as a sliding surface and an outer side facing toward the cylindrical pole tube. It is provided that the bearing foil is coated at least on the inner side using a first layer made of perfluoroalkoxy polymer. A manufacturing method for such an electromagnetic actuating device is also described.

A thrust gas bearing includes a collar portion fixed to a shaft portion, a first base part facing one axial end surface of the collar portion, a first gas film forming part formed between the collar portion and first base part, a second base part facing an other axial end surface of the collar portion, a second gas film forming part formed between the collar portion and second base part, and a cooling flow path to carry a fluid flow. The cooling flow path includes a first flow path formed on one axial end side of the first base part and extending from an axial center toward an outer periphery, and a second flow path formed on an other axial end side of the second base part and extending from an outer periphery toward an axial center. The second to flow path is located downstream of the first flow path.

A sliding component including a sidewall including at least one low stiffness projection capable of elastic deformation, and at least one high stiffness projection capable of plastic deformation, where the low stiffness projection includes a radial face at an innermost or outermost surface adapted to contact a neighboring component.

The present disclosure relates to methods for starting and rapidly decelerating a turbomachine in a power generation system that utilizes a supercritical fluid in a closed cycle.

A journal foil bearing system includes a retainer arrangement with an internal groove extending in a depth direction from the bore of the housing. The internal groove has a first portion and a second portion. The first portion extends further in the depth direction than the second portion and includes a seat surface of the internal groove. The retainer arrangement additionally includes a first top foil end and a second top foil end of the top foil member. The first top foil end is configured to abut the second top foil end to arch-bind the at least one top foil within the bearing system. The first top foil end is received in the first portion of the internal groove and is configured to seat against the seat surface to limit rotation of the first top foil end about the axis. The second top foil end is received in the second portion of the internal groove.

A bearing structure (100) of the present disclosure includes: a rotating shaft (11); a dynamic bearing (12) including a foil (22) and a foil holder (21), the foil (22) being disposed around the rotating shaft (11) to constitute a bearing surface, the foil holder (21) holding the foil (22); a bearing support member (13) disposed around the dynamic bearing (12) to support the dynamic bearing (12); and at least one elastic body (14) disposed between the bearing support member (13) and the foil holder (21).