Abstract: A treatment machine has a treatment drum mounted in a housing and rotatable by means of an adjustable drive. It is intended particularly for the treatment in batches of a bulk material with differing, changing humidities, treatment temperatures and distributions of the bulk material in, and on the circumference of the treatment drum. The treatment drum is mounted by means of at least two axially spaced bearing rings. Each bearing ring has movable, hydrostatic support elements, distributed evenly around the circumference of the treatment drum, and arranged between a contact surface on the treatment drum and the housing. Each support element has two parts which are able to be displaced in radial direction to each other up to a final position and is supported on the housing via an adjustably elastic intermediate member.

Abstract: An apparatus for the clearance-free mounting of at least one of the rollers in the support column of a calender. The mounting is for producing plastics material films achieved by means of a roller bearing which is divided into three, a central section or ring and two laterally outer sections or rings in a direction transverse to the major axis of the roller journalled to rotate therein. Each bearing ring or section comprises an inner ring portion, at least one row of cylinder rollers, an outer ring portion and a bearing body portion. Pressure applicator means are provided for displacing the central section relative to the two laterally outer sections or rings in a direction towards and away from the roller journalled therein so as to eliminate play within the bearing. To eliminate the play between the bearing body and the calender support column, an additional pressure applicator means is provided which is incorporated in the calender support column.

Abstract: A bearing arrangement between shafts of a fluid flow engine, especially including a high pressure turbine and/or a lower pressure turbine, includes a damping gap for the controllable formation of a carrier film between an outer bearing race and a bearing mounting member. A damping fluid is introduced into the damping gap of a squirrel cage bearing. The outer bearing race rotates with an r.p.m. corresponding to that of the high pressure turbine shaft r.p.m. or to that of the low pressure turbine shaft r.p.m. The damping fluid is supplied through a channel passing through the low pressure turbine shaft and into an entrapment chamber just at the entrance end of the damping gap, whereby the rotation of the entrapment chamber compresses the damping fluid by a centrifugal force into the damping gap.

Abstract: The size of a bearing 34 required to journal a propeller 16 may be reduced by mounting the bearing 34 on a piston 44 received in a cylinder 46 and by locating a piston 62 in a groove 52 on the hub 18 of the propeller 16. The groove 52 acts as a second cylinder and opens oppositely of the cylinder 46. The two are interconnected by bores and ports 64, 66, 68, 70 and filled with an incompressible fluid.

Abstract: A bearing support in which a rotating shaft (2) is disposed within a fixed support structure (14) and includes a bearing assembly (4) centered within the fixed support structure (14) by a plurality of resilient centering rods (20). A seal carrier (28) is urged against a rotating sealing surface (26) by a spring (32) and is radially positioned by a plurality of guide pins (34) secured to the fixed support structure (14). The guide pins (34) are disposed circumferentially intermediate the centering rods (20) to achieve a low profile configuration.

Abstract: A rotating shaft of a turbocharger is supported by two rolling bearings enclosed in a bearing housing. Two collar members are interposed between the housing and bearings for supporting the bearings in the housing. A U-shaped preloading member is interposed between the two collar members in such a manner that the U-shaped member forms an oil chamber therein. The U-shaped member receives a pressure of a lubricating oil supplied to the oil chamber from an engine, and expands to puch the rolling bearings through the collar members with a greater force when the engine speed is high, and therefore, the oil pressure is high.

Abstract: A fluid damper for controlling transverse orbital movement (14) of a non-rotating cylindrical body (12) is provided with a sealed, fluid filled reservoir (30) in fluid communication with a vent opening (24) disposed in a surrounding support member (10). A sized orifice (34) controls the volumetric flow rate of the damping fluid, maintaining an elevated average static fluid pressure in the annular volume (16) and resisting surge flow into the reservoir (30) through the vent (24) during the periodic occurrence of high fluid pressure in the annular volume (16) adjacent the vent opening (24).

Abstract: A pin which acts as a spring directly extends through an outer race without use of an outer-race casing and a pin holder and the central portion of the pin supports the outer race. Axial movement of the pin beyond a predetermined range is restricted by snap rings fitted on the both ends of the pin. An oil film is formed between the outer peripheral surface of the outer race and the inner peripheral surface of casings and oil reservoirs are also defined to damp axial movement of the outer race. That is, the pin which acts as a spring directly extends through the outer race of the bearing in parallel with a rotating shaft and the central portion of the pin elastically supports the outer race. The ends of the pin are supported by the casings through the snap rings. A space in which an oil film functioning as an oil film damper is formed is defined by the outer peripheral surface of the outer race and the inner peripheral surface of the casings.

Abstract: An oscillating pneumatodynamic bearing takes the form of a laminated transducer disk cooperating with a flat surface or a tubular transducer cooperating with a rod or an enclosing tube. Such bearings are also known as squeeze bearings. At least one piezoelectric, magnetostrictive or electrostrictive material is laminated with another material to provide oscillation of the transducer portion of the bearing so that the transducer portion is able to fly above a bearing surface on a fluid which is usually ambient air compressed by the mechanical oscillation of the transducer portion at an ultrasonic frequency. The disk or the tube is connected mechanically to supports and to its electrical sources of energy or signals at points along the loci of zero oscillation or minimal oscillation. With a laminated disk, a nodal circle is the locus of zero oscillation.

Abstract: An extensible boring bar is moved between fully retracted and fully extended positions proximal and distal to a machine housing. The bar is supported at a point within the housing and a snout and damper assembly is provided at the outermost face of the housing. The snout and damper assembly forms a compound damper system whereby an annular ring around an outer quill serves to damp the bar when simply supported in its fully retracted position, by damping the end support bearing directly. In the fully extended position, the bar is generally-cantilevered beyond the snout and damper assembly, and deflection of the bar will occur between the interior, support point and the snout support. Thus, the snout carries an additional annular damping chamber around the bar between the annular damping ring and interior or support point to damp the intermediate crown or deflection of the bar when fully-extended.

Abstract: A damper for absorbing nutating motion of a rotating shaft (10) at a bearing (12) includes a radially-extending, non-rotating flange (30) flanked axially by fluid-filled damping volumes (34, 36) formed between the flange (30) and a stable support frame (18).

Abstract: A thrust bearing particularly suitable for use with a vertical shaft machine has a rotating ring mounted to the shaft for rotation with the shaft and having a downwardly directed bearing surface. A base ring is positioned around the shaft and fixedly mounted to a machine foundation. A plurality of segmented bearing shoes extend around the shaft and have upwardly directed bearing surfaces for bearing engagement with the bearing surface of the rotating ring. Each shoe is supported from the base ring by a plurality of hydraulic elements which in one form are cylinders fixed to the base ring with pistons extending axially therefrom to engage the respective bearing shoe. Each cylinder is connected to a manifold to provide to each cylinder a hydraulic fluid under pressure. Because the source is common, each cylinder has hydraulic fluid at the same pressure.

Abstract: An improved system for guiding one part relative another in an accurately defined path, both planar and linear, is disclosed. The improved system eliminates friction associated with heretofore moving parts, is characterized by simplicity and cost effectivness, and comprises a first part having a primary reference surface prepared to close tolerances and accurately defining a predetermined path and an opposed parallel secondary surface, and a second part designed for guidance by the primary surface. A fixed air pad is adjustably mounted on the second part adjacent the primary surface. A second air pad is resiliently mounted on the second part adjacent the opposed secondary surface. The resilient mounting includes a bellows. Fluid under pressure is admitted to both air pads, directly to the first and indirectly via the bellows to the second. Preferably, the fluid is compressed air.

Abstract: Bearing for rotary shaft, of the type comprising at least one bearing element with a friction surface contacting with one external surface of the shaft. The bearing element comprises a bearing block on which is defined the friction surface and a support housing having an opening for receiving the block. The block and the housing are separated over the whole periphery of the opening by a gap, and joined together resiliently through the gap. The block and housing together define a closed cavity filled with a substantially incompressible fluid.

Abstract: Unwanted vibrations in rotating machinery are controlled from an "active" point of view, meaning, that certain parameters, and thereby vibrations, can be controlled while the machine is operating. This is accomplished from the theoretical knowledge known about rotor dynamics, mechanical vibrations, automatic controls, fluid dynamics, and bearing design theory to produce an active remedy to fundamental vibration problems. From the known information about the critical speeds of a machine and while the speed transients are occuring, active controls cause these critical speeds to be made variable and always away from the actual running speed. By this means, the machine does not have to "run through" the critical speeds but rather, the critical speeds are jumped over by control of certain parameters. This approach is novel but may be accomplished by several different techniques, of which a variety are presented herein.

Abstract: An improved system for guiding one part relative another in an accurately defined path, both planar and linear, is disclosed. The improved system eliminates friction associated with heretofore moving parts, is characterized by simplicity and cost effectiveness, and comprises a first part having a primary reference surface prepared to close tolerances and accurately defining a predetermined path and an opposed parallel secondary surface, and a second part designed for guidance by the primary surface. A fixed air pad is adjustably mounted on the second part adjacent the primary surface. A second air pad is resiliently mounted on the second part adjacent the opposed secondary surface. The resilient mounting includes a bellows.

Abstract: A bearing system for a high-speed, rotating shaft (20) includes an outer race (12) adapted to be rotatable in its machine support and ( 32) to carry a rolling bearing (16), such as a ball bearing, at one end and further includes a floating sleeve bearing (14) at the other end. The outer race of the system can be adapted to rotate on a film of lubricant at a speed less than one-third, and preferably about one-tenth, that of the rotating shaft. The bearing system can include thrust-bearing surfaces (12c, 12d) at one end of the outer race and surfaces to permit lubrication of the sleeve and rolling bearings. The floating sleeve bearing is free to rotate at speeds of about one-half the speed of the rotating shaft. The system thus can provide very low bearing losses and a long bearing life.

Abstract: A thrust bearing has a plurality of bearing pads each provided on its back side with a pivot, and a support on which the pads are disposed in the circumferential direction. An integral carrier is mounted on the support. The carrier has leg portions and a resilient portion and definies a squeeze film damper portion between the rear surface thereof and the opposing surface of the support. The pads are carried tiltably by the carrier through the pivots.

Abstract: In a plain bearing, at least one adapter segment is used which includes a bearing body cooperating with an adapter piston to define a pressure chamber therebetween. The pressure chamber is connected with the lubricant gap extending between the plain surface of the bearing body and the shaft to be supported so that the pressure as exerted by the shaft and prevailing in the lubricant gap is deviated to the pressure chamber so that oscillations of the shaft can be automatically controlled.

Abstract: A hydro-dynamic fluid-bearing assembly constituted by bearing members disposed around a rotary shaft with the interposition of a film of pressure fluid. At least one of the bearing members is subject when the shaft is stopped to the action of a resilient member generating a limited pre-loading strictly necessary for maintaining the assembly in its correct interrelationship, the said resilient means being subject during operation of the shaft to the action of pressure fluid bled from the film of fluid under pressure lying beneath the bearing member and such that the load on the bearing member increases with the pressure of the fluid film.

Abstract: A device for automatically adjusting the clearances in a roller bearing due to thermal expansion, constituting a tapered roller bearing having a dual track oppositely tapered inner race and a pair of single track tapered outer races, each outer race being in communication with a pair of coaxial, hydraulically loaded annular pistons, each of which translates in annular piston cylinders, supplied with hydraulic fluid. The hydraulic pressure of the fluid is maintained through an accumulator at a preselectable constant pressure to permit the outer races to translate axially, against the annular piston, as the inner race expands radially due to thermal expansion. Upon thermal contraction, the pressure forces the annular pistons axially toward the outer races, which, due to the taper of the races and the bearing elements, reduces the clearance created due to the thermal contraction.

Abstract: This specification discloses a bearing mounting device in which while the hydraulic pressure in a hydraulic mechanism for applying a preload to a bearing is being adjusted in a state in which the fixing sleeve of a fixing mechanism for fixing the bearing to a shaft has been expanded by hydraulic pressure, a predetermined preload is applied to the bearing through a spacer provided between the fixing mechanism and the hydraulic mechanism and through the fixing mechansim. The hydraulic pressure in the fixing mechanism is released with the predetermined preload being applied and the fixing sleeve is fixed to the shaft, whereby the bearing is fixed in its appropriately preloaded state.

Abstract: A flexibly damped shaft bearing arrangement with a bearing housing that surrounds the shaft in a ring, and a movable bearing support, which contains the shaft bearing and is suspended radially by springs in the bearing housing, contains a fluid pressure cushion between the bearing housing and the bearing support for damping purposes. In order to be able to adapt this shaft bearing arrangement for electrical machines in various states or stages of operation, there is provided, according to the invention, between the bearing housing and the bearing support, an second stage elastic suspension, which, when the machine equipped with such bearings is not operating, has a clearance with respect to the bearing support, which is smaller than the potential spring excursion of the bearing support. The clearance and the rigidity of the second stage suspension are designed to be adjusted or exchanged.

Abstract: A vibration-controlling bearing for controlling vibration developing in a rotary shaft supported in a housing of a rotary machine including a bearing member of a cylindrical shape interposed between an outer peripheral surface of the rotary shaft and an inner peripheral surface of the housing and spaced apart therefrom by respective gaps. A dynamic pressure is generated between an inner peripheral surface of the bearing member and the outer peripheral surface of the rotary shaft. Communicating ducts are formed in the bearing member for transmitting a portion of the dynamic pressure generated to a gap between the outer peripheral surface of the bearing member and the inner peripheral surface of the housing.

Abstract: A floating bush bearing comprising: a pair of an outer member having a cylindrical inner surface and an inner member having a cylindrical outer surface which is inserted in the outer member substantially coaxially, one of said pair of outer and inner members being rotatable and another member being fixed; a floating bush having inner and outer cylindrical surfaces fitted between the outer and inner members; a substantially cylindrical hole which is defined by opposed substantially semicylindrical outer and inner grooves which are formed in the opposed surfaces of the rotatable member and the floating bush; and a small cylindrical pin which is fitted into the hole.

Abstract: The precision rotatable polygonal mirror of a laser scanning system is fixed to one of a pair of spaced flanges of a rotatable shaft, and has one surface supported upon a fixed air bearing. A floating air bearing is formed to define a differential piston which is pressurized to load the bearing and provide the desired air film bearing thicknesses. The two part thrust bearing has a net effective axial dimension that varies to significantly decrease required tolerances, to minimize moments introduced into the shaft and polygonal mirror, and to provide a more constant air bearing clearance over a larger range of air pressures.

Abstract: A bearing assembly for the shaft of a boring head for an excavating machine comprises four piston-and-cylinder units bridged between the bearing and a support ring and pivotally connected thereto, the units lying along sides of an imaginary parallelogram of adjustable and inclined angle and side length.

Abstract: A load-compensated gas bearing comprises a base body (1) and a deformable bearing membrane (3) having a central opening for gas flow into a bearing interspace (17). The membrane is suspended from the base body via a ring-shaped web (4) which provides compliant tilt action at a tilt-bearing region (22) of connection to the base body (1). The base body (1) and the membrane (3) form an inner bearing chamber which is separated by the tilt bearing (22) into an outer chamber (9) surrounding the inner chamber (10). Under the action of an external force F on the bearing in the direction to reduce the bearing interspace (17), the membrane (3) is bent in concave shape as a result of the gas-pressure distribution within the bearing interspace (17).

Abstract: A rotatable spindle is carried in bearings located in one end of the bore in an adapter. The other end of the adapter is fixed in a machine base so as to cantilever the adapter. A damping chamber is formed along the adapter length between the machine base and the adapter, and a damping medium is provided in the damping chamber to control vibrations of the cantilever assembly. In one embodiment, a viscous damping medium is utilized to effectuate squeeze film damping. In an alternate embodiment, a visco-elastic damping medium is utilized in the damping chamber.

Abstract: A method and arrangement for setting metal molds on a press bolster are disclosed. A plurality of spaced bearing units are arranged in a press bolster wherein freely rotatable main large balls of the bearing units protrude at their tops slightly above a level of an upper surface of the bolster so as to cooperate to freely slidably support a combined set of an upper and a lower molds placed thereon, for positional adjustment of the molds to a desired exact position on the bolster.

Abstract: A support assembly for a rotating shaft utilizing an annular spring is disclosed. A series of support rods are spaced on the interior and exterior sides of an annular spring to define spring segments which act as a spring for supporting the journal. A squeeze film damper cavity may be incorporated either as part of the spring support structure or separately within the assembly to provide the necessary damping.

Abstract: A thrust bearing for a main propulsion shafting system on a ship having ting pads and fluid equalizing pistons. Hydraulic oil fills a recess on the face of each pad to provide additional lubrication and hydrostatic pressure to allow the bearing to handle added load capacity. The system for supplying oil to the recess may either be separate from the piston equalizing hydraulic system or part of a combined system. In the combined system, stationary control pads sense the oil thickness and control the oil flow.

Abstract: A hydrostatic pad or slipper bearing that is hydrostatically balanced to provide a substantially frictionless bearing with negligible fluid leakage, for supporting a moving part, in which there is a stationary housing in a cylindrical recess in which is mounted a bearing pad movable in the recess and surrounded by a liquid seal, the outward face of the pad being shaped to bear on the moving part to be supported and having a recessed area in its outward face which is defined by sealing land. A passage through the pad provides a communication between the inward face of the pad and the recessed area. Within the housing is a cylindrical cavity containing a valve assembly which is connected in a manner that is free of back lash to the pad so that the valve moves with the pad. The cylindrical cavity is supplied with liquid under pressure the entry of which is controlled by the valve and also with a passage leading to an area of lower of pressure.

Abstract: In a hydrostatic support member a piston which is axially movable in a pressurized fluid medium-supplied cylinder carries at the end thereof which is remote from the cylinder at least two bearing shoes which are axially movable independently of each other and which can be inclined relative to each other. There is achieved an automatic adaptation of the bearing or running surface of the support member to a counter surface changing in distance, shape and curvature even throughout a wide tolerance range. Such a support member is particularly suited for supporting the working rolls in a rolling mill, the diameter of which decreases during the operating or service life thereof, or for the support of back-up or supporting rolls backing-up the working rolls.

Abstract: In a machine tool having cooperating first and second slides slidably with respect to one another, an improved way damper has a damper plate carried by the first slide in slidable engagement with the second slide, and the plate is retained so as to permit slight movement of the plate in a normal direction to the movement of the first and second slides. A sealed damping chamber is formed between the damper plate and the first slide, having a viscous medium within the chamber which effects squeeze film damping as the damper plate and first slide undergo relative vibratory motion. An alternate embodiment employs a visco-elastic medium in the damping chamber to effect damping.

Abstract: A squeeze film damper for dynamically unbalanced rotor includes a bearing on the rotor having a non-rotatable outer race which is vibrateable as a unit with the rotor, on outer plain cylindrical surface on the bearing outer race, an inner plain cylindrical surface on a support around the outer surface concentric therewith when the rotor is aligned on a nominal axis of the support and cooperable therewith in defining a small annulus having a radial depth corresponding to the maximum radial vibratory displacement of the rotor, a groove in the inner cylindrical surface of axial length of between about 1/2 and 2/3 of the axial length of the small annulus and cooperable with the outer plain surface in defining a large annulus having a radial depth of at least three times the small annulus radial depth, the groove being axially symmetrical with respect to the small annulus, and means for maintaining the small and large annuli filled with fluid under pressure.

Abstract: This invention relates to a dual clearance hydrodynamic liquid squeeze film damper for a gas turbine engine. Under normal operating conditions the device functions as a conventional squeeze film damper, using only one of its oil films. When an unbalance reaches abusive levels, as may occur with a blade loss or foreign object damage, a second, larger-clearance film becomes active, controlling vibration amplitudes in a near-optimum manner until the engine can be safely shut down and repaired.

Abstract: An oil transfer tube for a gas turbine engine lubrication system is fabricated with radial and axial passageways so that it permits oil to feed the bearing's fluid damper and distributes oil to the bearing itself. The transfer tube is easily removable without disrupting the adjacent assemblies.

Abstract: A calender roll wherein a hollow rotary cylindrical shell surrounds a stationary carrier and the latter supports a set of hydraulic cylinder and piston units serving to urge the external surface of a bearing element toward the internal surface of the shell. The external surface of the bearing element is formed with liquid-filled pockets each of which communicates with the cylinder chamber of a pressure generating unit. The cylinder chambers receive pressurized liquid from a pump via first conduits whose resistance to the flow of liquid is more pronounced than that of second conduits which directly connect the cylinder chambers with one or more hydropneumatic accumulators.

Abstract: In a mount for a bearing on a high speed shaft subject to radial and axial vibratory displacement, a tube around the shaft having a first end rigidly connected to the bearing so that the tube vibrates with the shaft, an annular diaphragm spring with an inner diameter whereat a second end of the tube is rigidly attached and an outer diameter and a resilient planar portion therebetween, an annular shim between the diaphragm spring and a stationary parallel surface, a seal between the diaphragm spring and the parallel surface which cooperates with the shim and the parallel surface and the diaphragm spring planar portion in defining an annular squeeze film chamber, and means for maintaining the squeeze film chamber filled with fluid. When the shaft vibrates radially, the diaphragm spring planar portion distorts and the distortion orbits the squeeze film chamber wherein a resisting force is developed by the fluid to damp the vibrations.

Abstract: A track guide bearing assembly comprises a long track shaft having a plurality of rolling grooves formed axially thereof, a slidable bed having rolling grooves opposed to the rolling grooves of the track shaft in the inner surface of an axial recess for receiving the track shaft therein, a number of balls disposed for rolling between the mutually opposed rolling grooves of the slidable bed and the track shaft, a saddle member placed on the slidable bed, a liquid passage for supplying a pressurized fluid between the saddle member and the slidable bed, and means for floatingly supporting the saddle member in the fashion of static pressure disposed between the saddle member and the slidable bed.

Abstract: An oil feeding device for plain bearings supporting a crankshaft connected to an orbital scroll member in a scroll fluid apparatus, including axially extending oil flow passages formed on the outer peripheral surface of the crankshaft at portions journaled by the plain bearings but displaced from the lines of action of lateral loads caused by fluid pressure in the sealed space between two scroll members, thereby generating bearing oil film reactions commensurate with the lateral loads, so as to produce an optimum oil film pressure distribution for the bearings at all times.

Abstract: The invention relates to an ancillary throttle (2) for gas bearings (1) which are exposed to such varying operational load conditions (F) as to change the magnitude of bearing clearance (S). The throttle (2) stabilizes the bearing clearance (S) by using the load-dependent internal pressure of the bearing (1) to regulate the cross section of the throttle.Inlet (13) and outlet (14) of the ancillary throttle are separated by a membrane (6) which displaceably carries an insert (9) having a slightly conical bore, and the insert (9) is adjustably preloaded by a spring (10).A pin (8), also conical, extends through the bore and coacts with the bore to establish a throttle path of variable cross section. The conical pin (8) is axially displaceable in order to adjust the flow of gas.

Abstract: Multiple hydraulic chambers that are located within the inner race-outer race interface of a spherical bearing are individually pressure controlled to maintain lateral, or axial, centering of the inner race relatively to the outer race. Pressure control is provided by a mechanical/hydraulic spool valve, one associated with each chamber, which senses the depth of the clearance space between the inner and outer races and pressurizes or vents the associated chamber to maintain the inner race centered in the outer race in a forcing manner. An internal actuation system for the hydraulic bearing is also provided comprising multiple cavities that are displaced both longitudinally and angularly with respect to the centering hydraulic chambers.

Abstract: This invention relates to means for preventing the gap adjacent the tips of the blades of a rotor in a turbine type power plant from increasing as a result of rotor sag occasioned when an oil damped bearing is utilized.

Abstract: A bearing assembly for mounting the movable member of a measuring instrument includes a bearing element engaging the movable member, a spring member applying a force to the bearing element in a direction toward the movable member, and a shock absorber fixed in the assembly operating as an abutment against which the bearing element is urged by the spring member. A liquid damping system provided in the assembly is formed by a first chamber located on the bearing side of the bearing element and a second chamber located on the opposite side of the bearing element with one or more passages being provided for the damping liquid to flow between the first and the second chamber during displacement of the bearing element, the passage being proportioned relative to the bearing element such that only a relatively small damping force is applied against the bearing element during displacement thereof.

Abstract: An aerostatic axial thrust bearing comprising a movable part and a stationary part, one of said parts being constructed as a cup-shaped member having an upright wall, a closure member and a bottom which faces the other bearing part and which is formed by a diaphragm having a central opening. The side of the diaphragm facing the other bearing part is shaped so that the bearing gap between the two parts becomes narrower from the central opening in the diaphragm towards its outer edge, and the cup-shaped member having an inlet for the admission of a gaseous pressure medium to the space inside the cup-shaped member. The diaphragm is connected to the upright wall of the cup-shaped member at a location which is situated between the central opening and the outer edge of the diaphragm.

Abstract: A bearing system for high-speed rotary machinery wherein shaft support, flexible support and viscous damping are provided by separate and distinct mechanisms each of which can be adjusted independently of the other two.

Abstract: A bearing for supporting a turbocharger shaft comprises a one-piece cylindrical bearing sleeve for rotational floating between a turbocharger housing and shaft. The bearing includes an inner diameter configured to define a plurality of axially extending arcuate lands formed on a common radius and separated by oil-receiving recesses.

Abstract: A rolling mill roll having adjustable axial compliance is formed by a sleeve in the bore of which is located a stiffening arbor. The arbor is an interference fit with the bore of the sleeve over a limited central part of the roll but on each side of that central part is stepped in diameter to form, at each side, a divergent stepped space between arbor and sleeve. That space is occupied by a number of annular wedges which normally do not give support to the sleeve. At each end of the roll there is a hydraulic actuator which applies axial force to the wedges at that side and expand the wedges progressively against the sleeve. By varying the force applied by each actuator the number of wedges supporting the sleeve can be adjusted, thereby to vary the length of the sleeve supported by the arbor.