Abstract: A fluid damping system for damping a shaft within a gas turbine engine component. The fluid damping system including a damping liquid and a pressurized gas in a closed self contained system. In one aspect the damping liquid is cooled by being disposed in a heat transfer relationship with a fuel.

Abstract: In a balancing machine for the measurement of, and compensation for, any unbalance of rotors, with a sliding bearing for rotatably mounting a rotor to be balanced and a supply device for supplying the sliding bearing with a fluid, the sliding bearing includes a bearing shell with a hollow cylindrical bearing face mounting a rotor section having a cylindrical sliding face. The bearing shell is made of a hard ceramic material and the supply device is designed to supply the fluid in minimum amounts.

Abstract: Respective constituent members of a wheel bearing unit 5 are assembled and also a cover 74 is fixed to an inner end portion of an outer ring 6. The wheel bearing unit 5 is fitted to a turning machine 38 in a state that a space in which an encoder 72 is provided is sealed tightly from an outside by fitting a stop plug 96 into an insertion hole 84 provided in the cover 74. A top end portion of a rotating shaft 40 of a turning machine 38 is engaged with an engaged concave portion 102 provided to a hub 8a. A turning process is applied to an outer side surface of a rotary flange 13 while turning the hub 8a around the outer ring 6 by the rotating shaft 40, and thus the outer side surface is processed in predetermined shape and dimension.

Abstract: The invention proposes a linear guide unit comprising a guide carriage (1) that is mounted through rollers (3) for sliding on a guide rail (2), and further comprising a roller chain (8) comprising a cage (8a) for receiving the rollers (3), said cage being formed by spacers (16) arranged between adjacent rollers (3) and flexible belts (17) arranged at two front ends of the rollers (3) for connecting the spacers (16) to one another, said roller chain (8) being arranged for rotating in an endless roller channel (7) comprising a load-bearing section (10), in which the rollers (3) roll under load on raceways (4, 11) of the guide carriage (1) and of the guide rail (2), a return section (12), that is arranged substantially parallel to the load-bearing section (10) and in which the rollers (3) of the roller chain (8) are unloaded, and two deflecting sections (13) that connect the return section (12) and the load-bearing section (10) endlessly to each other, said endless roller channel (7) comprising lateral rims (14)

Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.

Abstract: A self-aligning bearing assembly is disclosed which is capable of reacting both radial and axial loads. An inner bearing race is connected to a rotatable shaft that is subjected to such loads. An outer bearing race is installed within a housing and is capable of movement in multiple directions with respect to the housing. The outer bearing race can rotate in planes corresponding to longitudinal sections of the outer race, i.e., rotational displacement. In addition, the outer bearing race can translate with respect to an inner wall of the housing in an axial direction of the housing, i.e., axial displacement. Such movement is enabled by the use of radially displaceable thrust rings which contact the outer bearing race, and control of the geometry of the outer bearing race and inner wall of the housing.

Abstract: A slide bearing is proposed which rotatably supports a rotary shaft of an impeller in a cooling water circulation pump mounted to a fuel cell. The slide bearing is formed of a synthetic resin containing no metal ions such as polyetherketone resin. This prevents impurities originating from the slide bearing from being dissolved into cooling water for the fuel cell.

Abstract: A pneumatic bearing for supporting a payload is disclosed. The pneumatic bearing comprises a bearing body having an active surface divided into a lift portion and a pre-load portion. A plurality of gas distribution channels are formed in the bearing body, wherein a first channel receives a compressed gas, a second channel supplies a vacuum to the pre-load portion of the active surface, and a third channel supplies a positive pressure gas to the lift portion of the active surface. The bearing body has an integral, pneumatically powered, vacuum generator having an inlet coupled to the first channel, a vacuum aperture coupled to the second channel, and an exhaust. The compressed gas may be supplied to the lift portion of the active surface either in parallel, in series, or in a series-parallel configuration, with the integrated vacuum generator. In an embodiment, the pneumatic bearing is reconfigurable.

Abstract: A bearing stave for use in a water-lubricated bearing having a discontinuous surface with a plurality of discrete, separated contact locations for contacting the shaft, the discontinuous surface being made of slippery polymer alloy.

Abstract: In a slide member such as a slide bearing, the invention can make a height of a bank portion around an oil keeping concave portion small, whereby it is possible to improve an initial conformability and improve an anti-seizure performance. A plurality of holes are formed on a slide surface with respect to an opposing member by a fiber laser apparatus. At this time, in the case that a height of a bank portion generated in the periphery of the concave portions in accordance with the laser processing so as to bulge from a slide surface is set to t, and a depth of the concave portions from the slide surface is set to h, an energy density of the laser beam is adjusted such that a value t is equal to or less than 3 ?m, and a rate t/h is between 0.1 and 0.5.

Abstract: The invention relates to a hydrodynamic bearing, particularly for a spindle motor, comprising a shaft, a thrust plate connected to the shaft and a bearing sleeve closed at one end by a cover plate, the bearing sleeve enclosing the shaft and the thrust plate with a slight radial spacing forming a concentric bearing gap filled with a lubricant. As is already known, the surfaces of the bearing sleeve and the shaft facing each other form at least one radial bearing region and the surfaces of the bearing sleeve, the cover plate and the thrust plate facing each other form at least one axial bearing region. In the hydrodynamic bearing according to the invention, at least one connecting channel is provided which connects a section between the bearing sleeve and the shaft abutting the radial bearing region and a section of the bearing gap abutting the axial bearing region to each other.

Abstract: The present invention relates to a bearing device for supporting a pinion shaft so as to freely rotate with respect to a case. The bearing device comprises a first tilt-contact rolling bearing provided on the connecting-flange-side outer peripheral surface of the pinion shaft and a second tilt-contact rolling bearing formed from an angular ball bearing provided on the pinion-gear-side outer peripheral surface of the pinion shaft, wherein lines of action of the first and second tilt-contact rolling bearings intersect with one another on an outer diameter side, the connecting-flange-side end portion of the first tilt-contact rolling bearing and the pinion-gear-side end portion of the second tilt-contact rolling bearing are respectively sealed with seal members, a sealed space between the seal members is infilled with grease, and the connecting flange is fastened in the pinion-gear direction to thereby preload the first and second tilt-contact rolling bearings.

Abstract: In a wheel supporting rolling bearing unit, an inner end opening out of both end openings of a space in which balls 14, 14 are provided is sealed with a cap 17a. An outer end opening is sealed with a seal ring 16c having three seal lips. A rolling resistance that changes based on a preload is regulated in a range of 0.15 to 0.45 N·m, and a running resistance of the seal ring 16c based on a friction between the seal ring and a counter surface is regulated in a range of 0.03 to 0.2 N·m.

Abstract: An arrangement of a sensor on a wheel bearing unit, the sensor is fixed to an outer wheel bearing ring of the wheel bearing unit, and at the sensor is located opposite an encoder of the wheel bearing unit which encoder can rotate with respect to the sensor about an axis of rotation of the wheel bearing unit. The wheel bearing unit has at least a first row of roller bodies and has a second row of roller bodies which is adjacent to the first row in the axial direction of the axis of rotation. The bearing ring engages at the same time around at least one of the rows.

Abstract: Hybrid orbital fluid dynamic bearing motors are disclosed. The motors achieve improved efficiency advantages observed in fluid dynamic bearing motors containing an orbital ring. In addition, the hybrid orbital FDB motor has serial thrust bearings and traditional style journal bearings, which provide typically higher radial and angular stiffness not observed in previous orbital fluid dynamic bearing motor designs. Designs for centering orbital rings are also disclosed.

Abstract: An exhaust apparatus for a differential exhaust mechanism having a labyrinth seal and a plurality of vacuum pockets includes a differential exhaust system for evacuating the vacuum pockets and an exhaust system for evacuating a chamber of exhaust gas. The differential exhaust system and the exhaust system are connected by control valves that can be opened and closed, enabling communication between the vacuum pockets and the interior of the chamber to be opened and closed (or connected and disconnected) as well. The valves are opened when a vacuum is being formed inside the chamber or when a malfunction occurs in the exhaust system, thus connecting the vacuum pockets and the chamber and preventing excessive pressure from building up on the hydrostatic bearing.

Abstract: A thrust sliding bearing (1) includes an upper casing (3) having an annular surface (2); an annular lower casing (5) which is superposed on the upper casing (3) so as to be rotatable about an axis (0) of the upper casing (3) and has an annular surface (4) opposed to the annular surface (2) of the upper casing (3); and an annular thrust sliding bearing piece (6) and an elastic ring (7) which are superposed on top of each other and are interposed between the annular surfaces (2) and (4).

Abstract: The present invention provides a split outer race for use in a rolling bearing. The split outer race is formed by bending a strip-shaped metallic plate into a substantially semicircle shape. At least one end of the split outer race in a circumferential direction has a concave-and-convex shape including a first slope portion which is inclined to an axial direction and a second slope portion inclined in a direction opposite to a direction in which the first slope portion is inclined. An edge portion formed on an inner surface of the one end in the circumferential direction has a round shape.

Abstract: The preset invention aims to improve the assembly accuracy and rotation accuracy of a fluid bearing device, and to further reduce the cost thereof. A bearing sleeve is fixed on the inner periphery of a housing. An axial member is supported in a non-contact manner in a radial direction by an oil film formed in a radial bearing gap. The housing made of resin is injection molded with the use of a substrate as an insert part. On the substrate, a control circuit for controlling a polygon scanner motor is mounted.

Abstract: A bearing assembly includes a double-row cylindrical roller bearing having no seals and having a grease sealed in its internal space. A double-row angular ball bearing having seals is provided in juxtaposition with one end face of the double-row cylindrical roller bearing. During run-in, part of the grease sealed in the double-row cylindrical roller bearing adheres to the outer surface of one of the seals of the angular ball bearing that faces the internal space of the cylindrical roller bearing. This increases the initial amount of grease sealed in the internal space of the cylindrical roller bearing, thereby prolonging its life.