The present invention relates to an airfoil bearing installation structure in which a spacer is provided on a bent portion of a foil assembly, the spacer has catching pieces having elasticity, and catching projections are formed on an inner wall surface of a slot formed in a housing so that the catching pieces are caught by the catching projections. Therefore, it is possible to prevent an axial movement and separation of the foil assembly without additionally installing a separate component for blocking an inlet of the slot.

A bearing assembly for supporting a screw-compressor rotor includes a shaft having a center of mass, at least one angular contact ball bearing mounted on the shaft, and at least one cylindrical roller bearing mounted on the shaft. A spacing from the angular contact ball bearing to the center of mass is shorter than a spacing from the cylindrical roller bearing to the center of mass.

An eccentric compensating torsional drive system for reducing the rotational eccentric conflict as between multiple eccentric rotational movement limits on the eccentric offset within the drive system, the system includes a motor, a first offset distance coupling, an offset floating bearing, a dynamic element that is driven in a first offset distance rotation by the motor, coupling, and offset floating bearing. Wherein the dynamic element is pivotally connected to a static element via a pivotal offset bearing assembly having a substantially matching offset to the first offset distance. Operationally, the offset bearing can have relative rotational movement to the coupling and dynamic element to lessen the dynamic conflict as between the first offset distance and the pivotal offset bearing assembly as the offset bearing acts as a floating variance in rotational offset via changing a radial position to the coupling and dynamic element.

A bearing assembly for rotatably supporting a first component with respect to a second component includes at least one bearing including a bearing ring, at least one further component, and at least one lubricant branch structure configured to carry a lubricant to the bearing and to the further component, wherein the lubricant branch structure is at least partially disposed in the bearing ring or the lubricant branch structure is at least partially disposed in a distributor piece directly abutting the bearing ring.

A supercharger comprises a housing, a gear box, and a shaft. The shaft comprises a first end and a second end, wherein the first end is located closer to the gear box than the second end. The supercharger comprises a shaft bore comprising a base wall, wherein the second end of the shaft is located in the shaft bore. The supercharger comprises a rotor bore in the housing and a rotor located on the shaft in the rotor bore. The rotor comprises an axis. The supercharger comprises a bearing surrounding the shaft and located closer to the second end of the shaft than the first end of the shaft, wherein the bearing comprises an outer ring abutting the shaft bore and an inner ring abutting the shaft. The supercharger comprises a biasing device abutting the bearing, wherein the biasing device moves the rotor along the axis.

A supercharger assembly comprises a housing, a shaft bore in the housing, a shaft extending into the shaft bore, wherein the shaft comprises an axis, and a bearing assembly located between the shaft bore and the shaft. The bearing assembly comprises an outer ring. The outer ring comprises an outer face. A grease is located between the outer face of the outer ring and the shaft bore. The grease has a viscosity greater than International Standards Organization Viscosity Grade 100.

A light-weight, high-strength compressor component is formed via additive manufacturing that has controlled stiffness and/or deflection levels. The component may have at least one interior region comprising a lattice structure that comprises a plurality of repeating cells. A solid surface is disposed over the lattice structure. The interior region comprises the lattice structure in the body portion of the light-weight, high-strength compressor component. The lattice structure may be used to globally or locally control stiffness and/or deflection levels of the compressor component. Additive manufacturing provides flexibility in forming compressor components with desirably improved strength-to-weight ratios while exhibiting high levels of control over stiffness and/or deflection. Methods of making such compressor components via additive manufacturing processes are also provided.

Improved bushing assembly (10) for supporting the shafts of the intermeshed rotors of a positive displacement rotary pump avoiding jamming, said bushing assembly (10) comprising on a lateral surface (13) thereof at least one compensation tank (15; 16) facing a suction side of the pump and at least one bleed channel (14) which connects said compensation tank (15; 16) to the discharge side. [FIG. 7]

Anti-wear surface coatings and methods for making them are provided. Such anti-wear surface coatings are particularly suitable for use in a compressor, such as a scroll compressor. A precursor powder material can be applied via spraying to a wear surface of a metal component of the scroll compressor. The precursor powder material comprises a powderized thermoplastic polymer (e.g., PEEK), a first lubricant particle (e.g., molybdenum disulfide (MoS.sub.2)) and a second lubricant particle (e.g., polytetrafluoroethylene (PTFE)). Then the applied precursor powder material is heated to form a substantially uniform coating covering the underlying metal component. The substantially uniform coating may have a thickness of less than or equal to about 0.005 inches (about 127 m).

Bearing 11 has base material 110 and coating layer 111. Base material 110 contains crank shaft 13 on an inner circumferential surface side. The inner circumferential surface of base material 110 is coated with coating layer 111. The inner circumferential surface side of base material 110 is coated with resin with thickness t, the resin is dried, and thereafter surface treatment is carried out such that multiple grooves C are provided on the surface of the resin so as to intersect with the direction of crank shaft 13, whereby coating layer 111 is formed. Peak portions B formed between adjacent grooves C come into contact with the outer circumferential surface of crank shaft 13 to support crank shaft 13. With bearing 11, the thickness of peak portions B at the center in the direction of the crank shaft 13 differs from the thickness of peak portions B at the end.