An airfoil journal bearing journal bearing includes a bearing housing for rotatably supporting a rotation shaft and including a hollow through which the rotation shaft is inserted, and an airfoil between an inner circumferential surface of the bearing housing and an outer circumferential surface of the rotation shaft. The airfoil includes a first foil region extending in a circumferential direction and enclosing the circumference of the rotation shaft between 180 to 360 degrees, and a pair of second foil regions connected to opposite edges of the first foil region in an axial direction of the rotation shaft, extending in the circumferential direction and enclosing the circumference of the rotation shaft between 180 to 360 degrees, and including a plurality of elastic bumps formed in the circumferential direction on the surface of the second foil regions.

A bearing assembly is disclosed that includes a first component with a first bearing surface, and a second component with a second bearing surface. A fluid is disposed between the first bearing surface and the second bearing surface supporting the first bearing surface and the second bearing surface in a non-contact rotational relationship. The first bearing surface, or the second bearing surface, or both the first bearing surface and the second bearing surface include a surface layer with solid lubricant 2D nanoparticles in a matrix.

A radial foil bearing of the present disclosure includes a bearing housing that has an insertion hole into which a rotary shaft is inserted, a base sheet that is disposed in the insertion hole, a back foil that is supported by the base sheet and has unevenness in a radial direction of the insertion hole, and a top foil that is supported by the back foil. The base sheet has a branch deviated in the radial direction of the insertion hole, and is engaged with at least one of the bearing housing, the back foil, and the top foil.

The disclosure relates to a bearing system for a drive turbine of a rotary atomizer, having a rotatable turbine shaft for receiving a bell cup which is used for spraying off the paint, and having a radial bearing for rotatably supporting the turbine shaft. The disclosure provides that the radial bearing has at least one foil bearing or a spiral groove bearing.

A pair of sliding components formed in an annular shape and disposed at a relatively rotating position of a rotary machine are constituted by a first sliding component 10 and a second sliding component. A sliding surface of the first sliding component has a plurality of dynamic pressure generation mechanisms each of which includes at least a shallow groove communicating with a leakage side. A sliding surface of the second sliding component has deep grooves each of which has a dimension deeper than that of the shallow groove of each of the dynamic pressure generation mechanisms and communicates with the leakage side, each of the deep grooves overlapping with the shallow groove each of the dynamic pressure generation mechanisms during relative rotation of the first and second sliding components.

The radial foil bearing (3, 3A, 3B, 3D) includes: a wave sheet-shaped back foil (11); and an intermediate foil (10) supported by the back foil, and the intermediate foil includes a flat portion (10b) facing a hill part (11c) of a wave sheet shape of the back foil, and a protruding part (39, 40, 40a, 40b, 40B) protruding toward the back foil via branching at a position in a circumferential direction between a top of at least one hill part and a top of a hill part adjacent to the one hill part in the wave sheet shape of the back foil.

A bearing housing for a two-wheel air cycle machine includes a first housing portion, a second housing portion, a third housing portion, and a journal bearing bore. The first housing portion is centered around an axis and has a first side and a second side. The second side is positioned axially away from the first side. The second housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the second housing portion connects to the second side of the first housing portion. The third housing portion is centered around the axis and has a first side and a second side. The second side is positioned axially away from the first side. The first side of the third housing portion connects to the second side of the second housing portion. The journal bearing bore is centered axially with in the bearing housing and has a diameter of D.sub.1.

An air foil bearing includes a bearing housing having a cylindrical shape that forms an accommodation space in a middle thereof for a rotating shaft, rotor, or journal; a first foil including a plurality of bump foils, which are arranged along an inner wall surface of the accommodation space of the bearing housing; and a second foil including a plurality of top foils, which are arranged in a circumferential direction along an inner circumference of the bearing housing to correspond to the plurality of bump foils and to support the rotating shaft, rotor, or journal. A portion of at least one of the plurality of top foils of the second foil is thicker than the other top foils of the plurality of top foils.

A radial foil bearing includes a bearing housing which has an insertion hole therein, a top foil which is disposed inside the insertion hole, and a foil structure which is interposed between the top foil and the bearing housing, the foil structure has a folded protruding portion that is bent outward in a radial direction of the insertion hole and is bent back inward in the radial direction, and the folded protruding portion is fitted to a fitting groove formed in an end surface of the bearing housing in an axial direction, the axial direction being a direction in which the insertion hole extends.

A bearing assembly is disclosed that includes a first component with a first bearing surface, and a second component with a second bearing surface. A fluid is disposed between the first bearing surface and the second bearing surface supporting the first bearing surface and the second bearing surface in a non-contact rotational relationship. The first bearing surface, or the second bearing surface, or both the first bearing surface and the second bearing surface include a surface layer with solid lubricant 2D nanoparticles in a matrix.