Abstract: A bearing assembly of a gas turbine engine includes a bearing inner race, a bearing outer race located radially outboard of the bearing inner race and a plurality of bearing elements located between the bearing inner race and the bearing outer race. A centering spring is operably connected to and supports the bearing outer race. The centering spring is an annular structure including a base portion, a tip portion, and a plurality of beams extending axially between the base portion and the tip portion.

Abstract: In one embodiment, a gas foil thrust bearing includes multiple arcuate bearing pads, each bearing pad including a top foil and a compliant support element, each top foil having a leading edge, a trailing edge, and a top surface that extends from the leading edge to the trailing edge, the top surface having a taper-flat-recess configuration in which the top surface includes a taper region located near the leading edge, a flat land region located near the trailing edge, and a pocket recess defined by a base, opposed side walls, and an end wall.

Abstract: A method of forming a bearing cage is generally disclosed herein. The method includes (i) forming a bearing cage from either titanium or a titanium alloy; and (ii) applying a plasma-nitriding treatment to at least one surface of the bearing cage to form a compound layer of titanium nitride including TiN and Ti2N on an outer region of the at least one surface. Step (ii) further forms a diffusion zone adjacent to the outer region, in one aspect. A surface hardness of the bearing cage that is treated by the plasma-nitriding step is at least 1000 HV. The bearing cage is configured to be used in a turbofan, turboprop, or turboshaft engine or in a helicopter gearbox, in one aspect.

Abstract: A ball bearing and housing assembly includes a shaft having a stepped bore extending therethrough. The stepped bore is defined by a first bore segment having an inboard cylindrical interior surface that has a first bore diameter. The first bore segment extends from a shaft end and terminates at a shoulder. The shoulder is axially located between a first radial centerline of a plurality of balls and an inner axial end. The stepped bore is further defined by a second bore segment having an outboard cylindrical interior surface that has second bore diameter. The second bore segment extends axially from the inner axial end towards the shaft end and terminates at the shoulder. The second bore diameter is greater than the first bore diameter. A fastener is fitted through the first bore segment and threaded into a housing.

Abstract: A bearing cover assembly can be assembled to a bearing housing in which a rolling element bearing is accommodated. The bearing housing assembly includes an annular adapter and an end cap that can be mated together. The annular adapter can have a tapered inner annular surface and can be inserted into the housing bore of the bearing housing. The end cap can have a corresponding outer tapered surface. When the end cap is inserted into the adapter hole defined by the annular adapter, the sliding contact between the tapered inner annular surface and the outer surface radially expands the annular adapter inside the housing bore creating a positive engagement retaining the bearing cover assembly to the bearing housing.

Abstract: An axial bearing is designed to work in a liner hangar in which radial package space is at a premium. Rollers axially separate two washers. To hold the bearing together prior to installation, a sleeve radially surrounds the rollers and has tabs which fit into circumferential grooves in the washers. The sleeve may be metal or plastic.

Abstract: Systems and methods related to hydrodynamic bearings for use in X-ray sources are provided. In one aspect, a hydrodynamic bearing system includes a sleeve assembly including a cross-member fluidically dividing a first interior cavity from a second interior cavity, a first shaft positioned in the first interior cavity, and a second shaft positioned in the second interior cavity. The hydrodynamic bearing system may further include a first journal bearing including a first fluid interface surrounding at least a portion of the first cantilever shaft and configured to support radial loads and a second journal bearing including a second fluid interface surrounding at least a portion of the second cantilever shaft and configured to support radial loads.

Abstract: A two-part ball bearing cage includes two, in particular at least substantially identical, cage parts forming an even-numbered plurality of ball pockets for receiving a corresponding number of balls having a predeterminable ball diameter. Each cage part has an annular body on which substantially evenly distributed webs are disposed in the circumferential direction to form the ball pockets. A distance in the circumferential direction between two webs that are adjacent in the circumferential direction approximately corresponds to the sum of twice the ball diameter and a width of the web in the circumferential direction. A ball bearing having the ball bearing cage and a method for assembly of the ball bearing are also provided.

Abstract: To provide a bearing device which can ensure the sealing performance by using floating seal to eliminate the need of adding lubricant over a long term and a construction machine comprising the bearing device. The bearing device comprises a shaft. The bearing device comprises a boss portion having a bearing rotatably holding the shaft. The bearing device comprises a cylindrical collar mounted on an end part side of the shaft rather than the boss portion. The bearing device comprises a floating seal for sealing lubricant sandwiched between the boss portion and collar. The bearing device comprises a pin being inserted into the insertion holes provided in the shaft and collar and integrally fixing the shaft and collar at a position where a predetermined axial load is applied to the floating seal between the collar and boss portion. The bearing device comprises a bracket having an opening for mounting the collar.

Abstract: A method for packing rolling elements in a bearing providing using a bearing ring fixing component to fix a first bearing ring, preventing it from shifting when subjected to radial compression; inserting two first packing supports between a first bearing ring raceway and a second bearing ring raceway at a predetermined circumferential angle, the two first packing supports dividing the bearing in a circumferential range into a compression zone lying and a warping zone lying outside the range of the circumferential angle; and using a bearing ring compression component to apply a compressive load to a circumferential portion of the second bearing ring. The compressive load directed towards the first bearing ring in a radial direction, to force a radial gap between the first bearing ring raceway and second bearing ring raceway to decrease, such that a window suitable for packing the rolling elements is formed in the warping zone.

Abstract: A pitch bearing for coupling a rotor blade to a hub of a wind turbine includes an outer race mountable to the hub and an inner race rotatable relative to the outer race and mountable to the rotor blade. The inner race is formed by first and second ring components, each of the first and second ring components having an outer annular face and an inner annular face. The first and second ring components are joined together at the inner annular faces such that the inner annular faces are opposed and opposite each other. A layer of friction enhancing material is inserted/disposed between the opposed inner annular faces, the friction enhancing material including an abrasive particulate component that increases a coefficient of friction to minimize slippage between the first and second ring components.

Abstract: A linear motion guide unit includes a rail having a raceway groove extending on each longitudinal side surface, and a slider fitting over the rail and movable relative to the rail. The rail includes a first rail member and a second rail member connected to each other in a longitudinal direction at a connecting portion. The first rail member has, at least at one end, a protrusion extending in the longitudinal direction. The second rail member has, at least at one end, a notch to be combined with the protrusion. In the connecting portion, the protrusion of the first rail member is combined with the notch of the second rail member to connect the first rail member and the second rail member. The protrusion and the notch are fixed with a columnar member extending in a direction intersecting the longitudinal direction.

Abstract: A wheel bearing outer ring with a plurality of fastening elements are configured to be fixed to the wheel bearing outer ring to a knuckle of a car are arranged at a radial outer side of the wheel bearing outer ring. A view of the wheel bearing outer ring with a line of vision being a central axis of the wheel bearing outer ring at least one angle between a first one of the fastening elements and a second one of the fastening elements, which are neighbouring with respect to the circumferential direction of the wheel bearing outer ring, differs from an angle between a third one of the fastening elements and one of the fastening elements, which is neighbouring to the third one of the fastening elements with respect to the circumferential direction. All the angles are measured with respect to the central axis and in the circumferential direction.

Abstract: A metal sleeve including a metal body which surrounds an inner channel running between a proximal and a distal opening. The inner channel has at least one groove set back into the metal body, running in the longitudinal direction of the inner channel and stepped on both sides by a distal and a proximal front edge. The proximal front edge of the groove is produced by impact extrusion.

Abstract: An apparatus is provided that includes a diamond bearing surface positioned in sliding engagement with an opposing bearing surface of a diamond reactive material. The opposing bearing surface is hardened via a material treatment.

Abstract: A linear motion guide unit includes a rail, a slider slidable relative to the rail, and rolling elements rollable in a rolling groove formed with the rail and the slider. The slider has a lubricating oil supply device provided at least at one end face thereof. The lubricating oil supply device includes a lubricating member that retains lubricating oil and abuts against a raceway surface of the rail to supply the lubricating oil to the rail, a housing having front, rear, and bottom surfaces covering front, rear, and bottom surfaces of the lubricating member, with an upper surface of the housing being left open, and a cover that covers at least an upper surface of the lubricating member. The housing is fixed to the slider with a first fixing member. The cover is fixed to the housing with a second fixing member, without being fixed with the first fixing member.

Abstract: A roller type linear guideway includes: a rail, a sliding block sleeved on the rail, and end cover units installed at two ends of the sliding block. One of the end cover units includes a first cover plate, a second cover plate, an open end cover, and an outer end cover. The first cover plate includes a plurality of penetrating holes communicating with the non-load passages, the second cover plate is installed on the first cover plate and includes holes connected to the penetrating holes, and the open end cover is installed on one end of the sliding block and includes through holes communicating with the holes. The outer end cover closes the through holes to allow circulation of multiple rolling elements. The through holes, the holes, and the penetrating holes are connected to the non-load passages, so four rows of rolling elements can be filled simultaneously.

Abstract: A bearing unit of a yawing system of a wind turbine having a tower and a nacelle connected by the yawing system. The bearing unit includes an adjuster element moveably secured to the bearing unit, a body element translatable relative to the adjuster element, a bearing element in contact with the body element, and a biasing means positioned between the body element and the adjuster element for applying a tension force to the bearing unit. The adjuster element adjusts the tension force applied to the bearing unit through translation of the body element, and respective surfaces of the adjuster element and the body element are visible during use.

Abstract: A gas bearing for a compressor includes a bearing portion and a sealing portion mounted to a bearing housing of the compressor via one or more dampers, and the sealing portion being fixedly connected to the bearing portion, and a vent with an inlet in the bearing. The bearing portion has an inner radial surface for radially supporting a shaft of the compressor. The sealing portion has a sealing surface. The inlet of the vent disposed between the inner radial surface and the sealing surface. The sealing surface and a rotating surface form a path that extends along the sealing surface. The path extending from a pressurized volume of the compressor to the vent, and the pressurized volume containing a fluid.

Abstract: A bearing assembly for a charging apparatus. The bearing assembly comprises a bearing housing and a shaft. The bearing assembly further comprises a compressor-side bearing bushing and a turbine-side bearing bushing which together support the shaft inside a bearing bore of the bearing housing. The bearing assembly is configured to supply unequal amounts of lubricant to a compressor-side outer lubrication gap of the compressor-side bearing bushing and to a turbine-side outer lubrication gap of the turbine-side bearing bushing. The bearing assembly is further configured to supply unequal amounts of lubricant to a compressor-side inner lubrication gap of the compressor-side bearing bushing and to a turbine-side inner lubrication gap of the turbine-side bearing bushing.