A thrust bearing includes: a thrust plate in a disc shape having an outer diameter and an inner diameter formed by perforating a central portion of the thrust plate; a plurality of bump foils disposed radially on a top surface of the thrust plate; a plurality of top foils in a panel shape covering each of the bump foils, where bottom surfaces of the top foils are in contact with upper ends of the bump foils; and metal blocks radially disposed on the top surface of the thrust plate and formed to be spaced apart from the bump foils. The thrust bearing can be included in an air compressor of a vehicle.

A thrust bearing includes: a top foil formed of top foil pieces which face a thrust collar; a back foil formed of back foil pieces which support the top foil pieces; and a base plate including support areas which support the back foil pieces. A support area includes an inclined surface defined by a first boundary line and by a second boundary line disposed on a trailing side of the first boundary line in the rotational direction of the thrust collar. The height of the inclined surface gradually increases from the first boundary line to the second boundary line. In addition, a back foil piece is disposed within the inclined surface which is formed continuously from the first boundary line to the second boundary line.

A compressor assembly, a vapor compression system incorporating the same, and a method for operating the vapor compression system are provided. The compressor assembly includes a motor for driving a rotating shaft, a foil bearing for supporting the rotating shaft, a compression mechanism for increasing the pressure of a working fluid, a supply line in fluid communication with the compression mechanism, and a heating apparatus for heating the working fluid. The supply line is configured for injecting the working fluid (e.g., from downstream of the compression mechanism) toward the foil bearing. The method provides for the monitoring of the temperature of the working fluid. When the temperature of the working fluid is less than 3° F. of superheat it is heated prior to being injected toward the foil bearing. The heating of the working fluid prevents, or at least mitigates, liquid from being transferred to the foil bearing.

Disclosed herein is a thrust bearing for a turbo compressor, the thrust bearing has a structure that is modified in response to a portion where a deformation amount of a thrust runner is relatively large on the basis of magnitude of a force applied at the time of rotation of a shaft of a turbo compressor, to maintain a thickness of an oil film constantly and to increase a load supporting force of the thrust bearing, thereby ensuring improved durability of the thrust bearing.

A thrust foil bearing includes a base plate including an insertion hole through which a rotating shaft is inserted and a support surface disposed around the insertion hole on one side of the insertion hole in an axial direction, and a back foil disposed on the support surface, in which the support surface has a plurality of inclined surfaces of which inclination angles inclined toward the other side of the base plate in the axial direction become shallower in order toward an outside of the insertion hole in a radial direction, and the back foil is divided into a plurality of divided regions in the radial direction by a slit, and the plurality of divided regions are supported by the plurality of inclined surfaces.

Each of foils (22) includes: a top foil portion (22a) including a bearing surface (S); and a back foil portion (22b), which is formed on an upstream side of the top foil portion (22a), and is arranged so as to overlap behind the top foil portion (22a) of the adjacent foil (22) (on a side opposite to the bearing surface (S)). An angle (E) covering a radially inner end of an overlapping portion (P) between the adjacent foils (22) is smaller than an angle (D) covering a radially outer end of the overlapping portion (P).

A fluid machine includes a rotary shaft, an operation body configured to discharge fluid by rotation of the rotary shaft, a housing accommodating the rotary shaft and the operation body, and a foil bearing disposed in the housing rotatably supporting the rotary shaft. The foil bearing includes a cylindrical bearing housing, a top foil between the bearing housing and the rotary shaft, and a bump foil between the bearing housing and the top foil and elastically supporting the top foil. The bearing housing has a protrusion protruding inwardly in a radial direction from the bearing housing. The protrusion includes an abutment surface configured to restrict deformation of the bump foil to an elastic range not to reach a plastic range by abutting against the top foil or the bump foil when the top foil is displaced outwardly in the radial direction of the bearing housing.

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.

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.

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.