Abstract: A controlled collapse stub shaft is provided for allowing controlled axial movement of a mainline shaft which joins a fan or compressor to a turbine of a gas turbine engine. A first end of the stub shaft is adapted to be joined to the mainline shaft. A second end of the stub shaft is adapted to be joined to a part of the engine which is axially stationary relative to the controlled axial movement of the mainline shaft. The stub shaft further has an annular body between the first and second ends. The body contains a plurality of axially-spaced circumferential rows of circumferentially-extending slots, inter-slot ligaments being formed between the slots of each row. Successive rows are offset. In this way, the ligaments of the axially forwardmost and rearwardmost rows excepted, each ligament is sandwiched between a forward slot and a rearward slot of its neighboring rows.

Abstract: When A denotes a required oil lower limit amount for one bearing near an oil supply source, and B and C respectively denote a required oil lower limit amount and a safety surplus oil amount for the other bearing away from the source, an amount of oil equal to A+B+C is supplied from the source and a hole diameter and the number of first oil holes are set such that an amount of oil to be supplied to the one bearing is equal to the amount A. Thus, the oil with the amount A can be securely supplied to the one bearing. Also, oil with the sum of the amounts B and C is supplied to the other bearing so that the oil with the amount B can be securely supplied to the other bearing which tends to receive oil insufficiently because of its remoteness from the source.

Abstract: A turbomachine with a rotary shaft supporting a turbine wheel is supported for rotation in a housing. The shaft extends through a bore in the housing and a bearing assembly being disposed in the bore. At least one end of the shaft has a primary seal and a secondary seal. The primary seal comprises a non-contact seal defined by an annular clearance between a first non-rotating seal element and a second seal element that rotates with the shaft. The primary seal is arranged to receive lubricating oil from the bearing assembly. An oil slinging feature is provided between the primary and secondary seals.

Abstract: A bearing apparatus includes: a bearing including a first race rotatable relative to a second race, wherein the first race includes one or more drain passages extending therethrough; and a squeeze film damper connected to the first race, the squeeze film damper including first and second squeeze film spaces separated by an oil drain path which communicates with the one or more drain passages of the first race.

Abstract: An optical module for use in a motion responsive system includes a support and a proof mass mechanically coupled and displaceable relative to the support along at least one sensing axis in response to a motion experienced by the support. The module also includes an optical monitoring assembly for monitoring the proof mass with an optical beam impinging on the proof mass, the beam including a plurality of dedicated spectral components. The module further includes an optical spectral filter including a plurality of filtering regions, each being associated with a corresponding dedicated spectral component and having a spectral profile including a distinct dedicated filtering band encompassing the spectral component, such that a displacement of the proof mass along the at least one sensing axis produces, after filtering of the beam, a change in optical power of the spectral components indicative of the motion experienced by the support.

Abstract: A bearing system comprises a bearing configured to be mounted to a shaft. A bearing housing interfaces the bearing to a structure. An annular gap is defined between an outer annular surface of the bearing housing and the structure and configured to receive oil therein. An outlet defined in an outer section surface of the bearing housing is oriented toward a component axially spaced from the bearing. A fluid passageway between the at least one outlet and the annular gap for fluid communication therebetween. In use the fluid passageway directs pressurized oil from the annular gap to the outlet to reach the adjacent component. A method for using oil from a bearing to cool or lubricate a component axially spaced from the bearing is also provided.

Abstract: A test apparatus includes a vibratory body that shakes a device under testing (DUT), a pedestal dedicated to support the DUT and disposed on the vibratory body, and a clamping mechanism operative to selectively clamp the pedestal to the vibratory body and release the pedestal from the vibratory body. The vibratory body and the pedestal define a cavity in which the clamping mechanism is disposed. The clamping mechanism includes a clamp ring and at least one locking element carried by the clamp ring so as to be displaceable in a radial direction relative to the clamp ring, at least one tang facing the at least one locking element in the radial direction, and a piston slidable in an axial direction relative to the clamp ring between a first position at which the pedestal is free from vibratory body and a second position at which the locking element is compressed between the piston and the tang.

Abstract: A developer container includes: a developer accommodating container for accommodating developer; a feeding member for feeding the developer, the feeding member being rotatable about an axis of a feeding shaft inside the developer accommodating container; and a drive transmission member rotatably mounted to the developer accommodating portion. The feeding shaft and the drive transmission member are bonded to each other at an engaging portion.

Abstract: The invention relates to a bearing cage of a bearing means, in particular a ball or roller bearing, which is produced by means of a generative manufacturing method and has an outer flange and a bearing seat, which are joined together via a plurality of spring beams.

Abstract: A bearing device includes: an outer ring housing in a cylindrical shape which is provided in a casing and has a discharge hole in an axially central portion of the outer ring housing and a notch groove passing through an axial end surface of the outer ring housing in the radial direction; and a rolling bearing mounted on each of both axial sides of the outer ring housing and rotatably supporting a rotational shaft positioned radially inside of the outer ring housing.

Abstract: A foil journal bearing. A single foil engages an inner surface of and is mounted to the bearing housing. The single foil extends circumferentially of the inner surface and has a generally flat top foil portion and a bump foil portion which is disposed between the top foil portion and the inner surface of the housing. The bump foil portion comprises a plurality of circumferentially spaced ridges which engage the top foil portion and further comprises a plurality of generally flat portions between the ridges respectively and which engage the inner surface of the housing.

Abstract: An oil film bearing for supporting a roll neck in a rolling mill, suitable in particular for transmitting high bearing forces when the bearing partners are slightly and slowly moved with respect to each other, has a bearing surface into which are incorporated rods made of a friction-reducing material (e.g., low friction compounds), which extend in a substantially perpendicular direction to the bearing surface. The rods are deformed during heat processing to define a bearing surface. The bearing partner, such as a roll sleeve, rests on the free face of the deformed rods.

Abstract: A device for centering and guiding rotation of a turbine engine shaft. The device includes a roller bearing and a ball bearing mounted around the shaft and carried respectively by first and second flexible annular supports, together with an oil film compression damper having a rigid annular support arranged around the roller bearing, the supports of the ball bearing and of the damper, and the roller bearing being stacked transversely, extending one around another.

Abstract: A flywheel assembly is described which is suitable for use as a compact power storage device. The assembly comprises a housing, a flywheel coupled to a shaft which is rotatably mounted in the housing via bearings, a primary chamber which is defined within the housing and contains the flywheel, and a secondary chamber which is defined within the housing and contains the bearings. Furthermore, it includes a molecular pump driven by the shaft for pumping gas molecules from the primary chamber to the secondary chamber. Location of the bearings in a high pressure chamber inhibits off-gassing from the bearing grease. Furthermore, any such off-gassing under load will not increase the gas pressure in the first chamber containing the flywheel as it is separate from the secondary chamber containing the bearings.

Abstract: A clamping device includes a base body defining at least a portion of at least one pressure chamber, which has at least one opening oriented in a direction of action. A membrane is connected with the base body in a pressure-tight manner and seals the at least one opening in the direction of action. The membrane defines a first side wall section of the pressure chamber. A movable second side wall section partially delimits the pressure chamber and a constant amount of pressure fluid is sealed in the pressure chamber. At least one mechanical actuator displaces or deforms the second side wall section in order to cause the membrane to outwardly bulge.

Abstract: A gas turbine engine includes a fan shaft and a support which supports the fan shaft. The support defines at least one of a support transverse and a support lateral stiffness. A gear system drives the fan shaft. A flexible support at least partially supports the gear system, and defines at least one of a flexible support transverse and a flexible support lateral stiffness with respect to at least one of the support transverse and the support lateral stiffness. An input to the gear system defines at least one of an input transverse and an input lateral stiffness with respect to at least one of the support transverse and the support lateral stiffness. A method of designing a gas turbine engine is also disclosed.

Abstract: An electric motor includes an armature shaft which is mounted in at least one floating bearing. The floating bearing comprises a bearing inner ring, which is positioned on the armature shaft, a bearing outer ring, which is received in a bearing seat, and a fluid pump for a vehicle fluid system having the electric motor. Lubricant disposed between the armature shaft and the bearing inner ring forms a hydrodynamic lubricant film and generates a constant relative movement between the armature shaft and the bearing inner ring.

Abstract: A hermetically sealed damper assembly includes a sealed damper housing, a plunger, and a load transferring member coupled to the plunger. The sealed damper housing includes a body having a cavity and a resistive flow path defined therein. The cavity and resistive flow path are filled with a viscous fluid. The body includes a plurality of springs integrally formed therein. The plunger is disposed within the cavity, and separates the cavity into a first control volume and a second control volume. The resistive flow path provides fluid communication between the first and second control volumes. The plunger is coupled to the damper housing by the plurality of springs such that the springs provide a restorative force to the plunger. The load transferring member is configured to transmit mechanical loads to the plunger.

Abstract: A bearing assembly for use in an electric motor has a temperature-activated stabilizer to reduce vibration. The electric motor has a stator assembly and a rotor assembly and the bearing assembly includes a collar that has an outer diameter that is less than an inner diameter of the stator assembly. The bearing assembly further includes a temperature-activated stabilizer assembly that includes an extensible member positioned within the stabilizer recess. Under a first temperature the extensible member has a first volume and under a second temperature the extensible member expands to a second volume that is larger than the first volume. As the extensible member expands, the extensible member comes into contact with the stator assembly.

Abstract: In An AC generator for a vehicle in which a bearing is inserted into a bearing box formed in a bracket and the bearing is fixed and retained by a retainer, the retainer has a cylindrical shape and a threaded portion is formed on the cylindrical section thereof, a threaded portion is formed on the bearing box, and the threaded portion of the retainer is directly screwed to the threaded portion of the bearing box in order to fix and retain the bearing, so that the gap between the outer circumference surface of the bearing box or the outer circumference surface of the retainer and the opposing side of a cooling fan is made uniform.

Abstract: A rotary mechanism for incrementally advancing a rotary element (13) with respect to a ground member (12) comprises a unidirectional clutch (41) and a rotary actuator (21, 33, 39). Actuation of the actuator is against a resilient bias (34), and overcomes friction between the rotary element and the ground member to advance the rotary element with the unidirectional clutch locked. Release of the actuator allows re-setting thereof by the resilient bias, the friction between the rotary element and the ground member resisting further relative movement.

Abstract: A spindle unit includes: a main spindle that holds a rotary tool, and that is rotated; bearings by which the main spindle is rotatably supported; and a damper bearing by which the main spindle is rotatably supported, and that has a damping coefficient larger than damping coefficients of the bearings. The damping coefficient of the damper bearing is set to a value within a range from 10,000 to 1,000,000 N·s/m.

Abstract: To recover the axial forces transmitted by a rotating shaft, a bearing assembly includes a plurality of distributed bearing units. Each bearing unit comprises: a stationary base; a resilient member having a stationary portion and a portion that is completely movable in a main direction of the forces to be supported; and a bearing surface that defines, together with the shaft, a water film. The bearing surface is connected to the movable portion. The minimum radius of the bearing surface is between 1 m and 3 m. The resilient member and the base define at least one water chamber. A plurality of ducts are arranged so as to connect the chambers together, thereby defining a closed circuit.

Abstract: A bearing unit for a turbocharger, including a bearing housing extending in an axial direction and also including a bearing cartridge arranged within the bearing housing, wherein between the outer circumference of the bearing cartridge and the bearing housing there is formed an intermediate space with an oil film, and wherein the bearing housing has a supply bore formed for the supply of oil to the oil film. The bearing cartridge includes a rolling bearing, the outer cartridge ring of which is mounted in a freely rotatable manner in the oil film. A bearing unit for a turbocharger, the bearing cartridge of which includes a rolling bearing, the bearing outer ring of which is mounted in a freely rotatable manner in the oil film. By means of bearing units of such design, it is possible to ensure the secure mounting of a shaft even without a separate twist prevention device.

Abstract: A main spindle device of a machine tool includes a plurality of bearings that rotatably support a main spindle of the machine tool, and that are placed inside a housing with a pressure receiving member interposed between the bearings and the housing. The pressure receiving member is capable of moving in a direction perpendicular to an axial direction of the main spindle. A pressure chamber, which a pressure medium pressing the pressure receiving member toward the bearings in the perpendicular direction is supplied to, is formed in the housing. A plurality of the pressure chambers are independently formed in the housing so as to correspond to the bearings, respectively. The main spindle device further includes a plurality of adjustment units provided independently so as to correspond the pressure chambers, respectively, and each capable of independently adjusting a pressure of the pressure medium for a corresponding one of the pressure chambers.

Abstract: A squeeze film damper is provided, which includes a bearing cartridge (6), a housing (4), in which the bearing cartridge (6) is accommodated, and a squeeze film in a gap (22) between the housing (4) and the bearing cartridge (6) for producing a damping force directed opposite a circulating radial exciter force, which is generated by an imbalance retained in the bearing cartridge (6). In the squeeze film damper, an arrangement (28) for attenuating the damping force according to the circumferential position are provided around the bearing cartridge (6).

Abstract: A method for disassembling a low-pressure process apparatus. The method provide a transmission device and a low-pressure process apparatus; and moves the housing to a transmission device in a first horizontal direction via the first roller set.

Abstract: The present invention provides an alignment device of cutting machine, which includes: a stand and a ball transfer unit mounted on the stand. The ball transfer unit includes a main body, a first rotating body, and a plurality of second rotating bodies arranged between the main body and the first rotating body. The main body has an end forming a receiving chamber and thus forming a receiving chamber sidewall. The second rotating bodies are rotatably arranged on the receiving chamber sidewall. The main body forms an air entrance passage in communication with the receiving chamber. The receiving chamber sidewall extends out to form a bearing section corresponding to the air entrance passage. The bearing section has a side surface in which air outlet ports are formed. The main body has an opposite end forming a connection section that is mateable and coupleable to the stand.

Abstract: A coast-down bearing and method for a magnetic bearing system is provided. The bearing includes first, second, and third rings disposed around a shaft. The first, second, and third rings each have an inner diameter that is greater than an outer diameter of the shaft and provide a running clearance therebetween. The first, second, and third rings are eccentrically positioned with respect to each other to form a pocket for receiving the shaft during a drop, radial shock, or both.

Abstract: A module flexible ligament damper includes an cylindrical inner structure with a central axis and an outer cylindrical surface. An outer casing with an inner cylindrical surface is positioned around the inner structure. A modular ligament with an inner flange and an outer flange connected by a web is positioned between the inner structure and the casing. The inner flange is connected to the inner structure and the outer flange is connected to the casing to support the inner structure within the casing, and to permit free orbital movement of the inner structure on a plane perpendicular to the axis of the inner structure. In one embodiment, the web is straight but does not intersect the axis of the inner structure for flexing in a radial direction. In other embodiments, the web is curved for radial flexing.

Abstract: A roller assembly for a turret, a turret bearing system for a turret, and a method of manufacture of a roller assembly for a turret. The roller assembly comprises a first and a second roller; an axle on which the first and the second rollers are rotatably mounted; and a biasing mechanism located between the first and the second rollers and supporting the axle.

Abstract: An architecture making it possible to provide sufficient absorption of shocks for a power shaft while maintaining rigidity at front bearings so as to not compromise meshing of power teeth of a drive pinion. A compressible dynamic shock absorption is provided in alignment with a downstream shock absorber of an additional meshing. An assembly for dynamically absorbing shocks for a power shaft includes upstream and downstream bearings including power rollers mounted on two casings and flanking a speed-reducing teeth meshing. The downstream bearing is coupled to at least one additional roller bearing associated with a compressible shock absorber to form a downstream shock absorber axially offset relative to the upstream bearing opposite the teeth meshing. Both downstream bearings are connectable by a flexible frame mounted on the common casing. The architecture can be used for power-transmission shafts, for example supercritical shafts in turbine engines.

Abstract: A tunable mass damper (TMD) is provided that can be coupled to a rotating inertia apparatus such as a reaction wheel assembly (RWA). The TMD includes a housing that contains a flexure, a mass, and damping fluid within the housing. The housing is coupled to the flexure, and the flexure is coupled to the mass. The mass is free to sway in the damping fluid. The damping fluid envelops the mass and provides damping between the mass and the housing. At least one of the mass, flexure and the damping fluid can be adjusted to tune the TMD to produce a resonance at or near a mode that is to be mitigated by the TMD such that it operates at a desired or optimal operating frequency.

Abstract: A bearing support cage includes: an annular forward ring; an annular aft ring; an annular mounting flange disposed between the forward and aft rings; an annular array of axially-extending first spring fingers interconnecting the forward ring and the aft ring; and an annular array of axially-extending second spring fingers interconnecting the mounting flange and the aft ring, wherein the first spring fingers are interdigitated with the second spring fingers. The forward and aft rings, the mounting flange, and the spring fingers are all part of a single monolithic component.

Abstract: A bearing support apparatus for a gas turbine engine, including: a first annular member; a second annular member disposed within the first annular member; first and second axially spaced-apart rolling-element bearings disposed between the first and second annular members so as to enable relative rotation of the first and second members; a first spring element mounting the first bearing to the first member; and a second spring element mounting the second bearing to the first member through the first spring element, such that the first and second bearings are physically supported in series relative to the first member.

Abstract: A main spindle device of a machine tool includes a plurality of bearings that rotatably support a main spindle of the machine tool, and that are placed inside a housing with a pressure receiving member interposed between the bearings and the housing. The pressure receiving member is capable of moving in a direction perpendicular to an axial direction of the main spindle. A pressure chamber, which a pressure medium pressing the pressure receiving member toward the bearings in the perpendicular direction is supplied to, is formed in the housing. A plurality of the pressure chambers are independently formed in the housing so as to correspond to the bearings, respectively. The main spindle device further includes a plurality of adjustment units provided independently so as to correspond the pressure chambers, respectively, and each capable of independently adjusting a pressure of the pressure medium for a corresponding one of the pressure chambers.

Abstract: A bearing ring is provided, including a body and an end face (3; 6). The problem of providing a bearing assembly having a space-saving preloading device which can be actuated quickly is solved for this bearing ring by a piston (8; 15) of a fluidic preloading device; the piston being accommodated in the end face (3; 6). A bearing assembly is also provided including a bearing (2) having a bearing ring (1) and a first fluidic preloading device for setting a bearing preload, this preloading device acting on a first end face (3) of the bearing ring (1), and further including a second fluidic preloading device which acts in the opposite direction on a second end face (6) of the bearing ring (1).

Abstract: A roller bearing assembly is configured to rotatably support a machine component connected with a shaft in a position relative to a reference component. The roller bearing assembly includes a radial bearing, an axially-displaceable axial bearing and an adjusting device configured to adjust an axial gap between the machine component and the reference component by automated axial displacement of the axial bearing. The adjusting device includes a hydraulic regulating device configured to axially displace the axial bearing.

Abstract: A decoupling system for a rotary shaft of an aircraft turbojet, the decoupling system including: a rolling bearing including rolling elements inserted between a first ring fastened to a stationary bearing support and a second ring mounted in a mounting chamber fastened to a rotary shaft; a transmission mechanism transmitting rotary torque from the rotary shaft to the second ring; a mechanism allowing the second ring to move radially relative to the mounting chamber when a static force associated with an unbalance affecting the rotary shaft exceeds a predetermined threshold; and a plurality of leaktight flexible bags interposed between the second ring and the mounting chamber and each including a heterogeneous structure including a porous capillary solid matrix and an associated liquid relative to which the matrix is lyophobic.

Abstract: A rotary bearing that includes an inner race and an outer race the races are configured between a rotor and a housing body. At least one of the outer race and a mounting surrounding an outer race sleeve is at least one of clamped and fixed in a predetermined position on the housing body by at least one of a holding device and a locking device of a material damping structure.

Abstract: A bearing sump includes an annular housing having a first axial length that is substantially equivalent to an axial length of the bearing sump; an annular bearing support disposed concentrically within the annular housing and having a second axial length that is less than about 50% of the first axial length; an annular space between the housing and the bearing support; and first and second axial ribs in the form of annular segments having a central angle of less than about 60 degrees and connecting with both the housing and the bearing support.

Abstract: Disclosed herein is an axially balanced load turbocharger assembly as shown in one form comprises several substantially known components, generally a compressor wheel 22, a turbine wheel 24 and a shaft 26. One form of a housing 28 is also disclosed, which in the specific embodiment disclosed herein comprises several novel components. The apparatus utilizes an oil port in fluid communication with an external oil source, and several oil channels in the housing and in the bearing assembly to direct lubrication oil to all parts which move (rotate) in relation to adjacent components. The apparatus is configured to balance an axially directed load on the shaft so as to minimize damage to the turbocharger, and in particular to the bearing assembly.

Abstract: A hydraulic bushing having at least two chambers and at least one channel connecting the chambers. The bushing is made of a high durometer rubber or other polymer to increase durability. The bushing further includes a center bearing press fit in the center of the annular bushing. The bushing is further press fit into an annular seal operable to seal the fluid within the chambers and channels. The bearing, bushing, and seal assembly is then press fit into a bracket which is subsequently mounted to the vehicle. The center bearing is operable to hold the prop shaft wherein the center bearing is free to rotate within the bushing thereby allowing the prop shaft to rotate.

Abstract: A bearing support is disclosed herein. The bearing support includes a pilot ring encircling an axis. The pilot ring is operable to be substantially-fixed in operation. The bearing support also includes a damper ring operable to receive an outer race of a bearing assembly. The bearing support also includes a fuse pin extending through aligned apertures in the pilot ring and the damper ring to prevent relative radial movement between the pilot ring and the damper ring up to a predetermined amount of loading. The fuse pin is operable to fracture in response to loading beyond the predetermined amount. The bearing support also includes a retainer extending through one of the pilot ring and the damper ring and fixed to the other of the pilot ring and the damper ring. The fuse pin is engaged with at least one of the first and second apertures through a heat shrink fit.

Abstract: The present invention provides a ball transfer unit, which includes: a main body, a first rotating body, and a plurality of second rotating bodies arranged between the main body and the first rotating body. The main body has an end forming a receiving chamber and thus forming a receiving chamber sidewall. The second rotating bodies are rotatably arranged on the receiving chamber sidewall. The main body forms an air entrance passage in communication with the receiving chamber. The receiving chamber sidewall extends out to form a bearing section corresponding to the air entrance passage. The bearing section has a side surface in which air outlet ports are formed. The ball transfer unit of the present invention prevents powder dusts from falling therein, ensures smooth operation of the ball transfer unit, and extends the lifespan.

Abstract: A vibration control apparatus may include a fluid bearing provided around a rotating body to form a fluid bearing gap between the fluid bearing and the rotating body; and/or a pressure regulator configured to variably control a pressure of the fluid bearing, based on imbalance information of the rotating body, to compensate for imbalance of the rotating body. A computed tomography scanner may include a gantry configured to generate a computed tomography image while rotating around a test subject; a fluid bearing provided around the gantry to form a fluid bearing gap between the fluid bearing and the gantry; and/or a pressure regulator configured to variably control a pressure of the fluid bearing, based on imbalance information of the gantry, to compensate for imbalance of the gantry.

Abstract: An assembly for a turbocharger includes a ball bearing cartridge, a center housing with a bore, a turbine end counterbore and a compressor end surface that includes a recess, and a compressor backplate with an axial extension configured to fit into the recess where the counterbore and the backplate define, at least in part, an axial length of a bearing cartridge chamber. Various other devices, assemblies, etc., are also disclosed.

Abstract: An assembly for a turbocharger and a method of assembling a turbocharger are disclosed. Such an assembly can include an elongate pin having a tapered part and a protrusion at one end of the pin. The elongate pin is configured to be inserted within a housing opening and a cartridge opening such that the taper of the body portion of the pin mates with the taper of the housing opening. The cartridge opening is configured as to mate with the pin such that the pin substantially restricts the bearing cartridge from surging and rolling but substantially permits all other movements of the bearing cartridge.

Abstract: A round table bearing, which has a radial, axial roller bearing for mounting a first bearing ring part relative to a second bearing ring part, and a squeeze-film damper which is connected parallel to the radial, axial bearing. The squeeze-film damper has a basic damper component which is coaxial to the bearing ring parts and which is fastened, together with a rolling element of the bearing ring part which contacts the radial, axial roller bearing, to a rotary table base part.

Abstract: A damper structure of the present invention is provided on a shaft end (3a) of a spindle shaft (3) supported by a bearing, which shaft end (3a) extends outwardly from the bearing, and includes: a sleeve (11) provided around an outer circumference of the shaft end 3a); a housing (12) provided in a spaced manner from the sleeve (11) in a radial direction of the spindle shaft (3); and a moving portion (13) that moves the housing (12) and the sleeve (11) relatively in a spindle shaft direction, in which a squeeze film S (S1) is formed between an outer circumferential surface (11a) of the sleeve (11) and an inner circumferential surface (12b) of the housing (12) that face each other, and in which a formation area of the squeeze film S (S1) is variable.