Abstract: A throttle unit is equipped with a grooved block including at least one minute groove formed on a plane surface, and an opposite block having a plane surface which is opposite to the minute groove. The grooved block and the opposite block are detachably joined so as to be opposite to each other. A throttle fluid path is formed by the minute groove and the plane surface of the opposite block. At least one surface of each of the minute groove is constituted by a curved surface or an inclined surface that is inclined with respect to the plane surface of the grooved block.

Abstract: The invention relates to a method for transporting foamed thermoplastic polymer particles (3) from a container (5, 9) through at least one pipe (7, 11), wherein, for transporting the foamed thermoplastic polymer particles (3), a gas stream is applied through the pipe (7, 11). The foamed thermoplastic polymer particles (3) are wetted with a water comprising lubricant.

Abstract: A compact, noncontact mechanical coupling, damping, and/or load bearing device comprising an internal load bearing member and an external load bearing member that are mated in an interdigitated relation while maintaining a gap therebetween is described. In some embodiments, the gap between the internal and external load bearing members is maintained by hydrostatic means, hydrodynamic means, electrorheological fluids, magnetorheological fluids, electric fields, and/or magnetic fields.

Abstract: An inertial navigation system is provided. The system includes a sensor block, an outer shell that substantially surrounds the sensor block and a plurality of gas pads connected to the outer shell that float the sensor block in gas creating a near frictionless environment to allow the sensor block to rotate in all directions. Each of the plurality of gas pads is adapted to receive pressurized gas. The outer shell and the sensor block are separated by a gap created by the pressurized gas at each pad.

Abstract: An air bearing has a rotor having a circularly curved radial rotor bearing surface along its circumferential direction. The air bearing also has a stator having at least one radial stator bearing surface partially enclosing the rotor in the circumferential direction. The radial stator bearing surface is curved according to a profile following the circumferential direction of the rotor and is fashioned to generate an air gap between it and the radial rotor bearing surface so that, upon operation, the rotor is borne, supported by an air current in the air gap. The profile shapes the air gap such that, at a starting temperature that deviates from an operating temperature, the air gap has a smaller thickness (measured in the radial direction) in a second region of the radial stator bearing surface in comparison to a first region of the radial stator bearing surface along the circumferential direction.

Abstract: A weight compensation apparatus for compensating for a weight of a stage that is movable along a vertical reference plane including a pulley having a pulley shaft, a belt which is wound around and supported by the pulley, and has the stage at one end and a counter mass corresponding to the stage at the other end, and a hydrostatic bearing which has an arcuated bearing portion, and supports the pulley shaft by causing a fluid to flow into a bearing gap between the bearing portion and the pulley shaft.

Abstract: The invention relates to an arrangement for displacing a roll, which is hydrostatically journalled by its axle (1) on support structures and positionable in its working position by means of a bearing, through a rapid movement of the bearing out of its said working position. The journalling comprises at each end of the roll at least one loading element (2-4) pressurizable with a hydraulic medium and at least one support element (5). The arrangement of the invention comprises a valve control piston (9), delivering a hydraulic medium required for the pressurization of said at least one loading element (2) and positioned in a valve cylinder (8), said control piston (9) being provided with a positioning valve (10) on the face of the control piston (9) pointing towards the loading element (2), the face of the control piston (9) opposite relative to the positioning valve (10) being coupled with a pressure line (LP) of the hydraulic system for focusing a holding pressure on the control piston (9).

Abstract: A vacuum-hydrostatic shoe especially suited for supporting a workpiece in metalworking operations is disclosed. The vacuum-hydrostatic shoe is comprised of a body with a support surface confronting the workpiece. Preferably the support surface is shaped to substantially conform to the workpiece shape. The shoe body comprises hydrostatic pockets. Each hydrostatic pocket has a first pressure opening defined in the support surface and a second pressure opening fluidly connected to a respective first pressure opening. The second pressure openings are also fluidly connected to a supply of pressurized fluid so that a flow of pressurized fluid can be created between the shoe body and the workpiece. The shoe body further comprises a vacuum pocket. The vacuum pocket has a first vacuum opening defined in the support surface and a fluidly connected second vacuum opening. The second vacuum opening is also fluidly connected to a source of vacuum to create a vacuum pressure between the shoe body and workpiece.

Abstract: In order to monitor the function of the sliding block bearing elements in view of the hydrostatically and/or hydrodynamically generated compressed oil film or, respectively, compressed oil cushion, given rotating drums seated on sliding blocks such as, for example, tube mills, and to control the operation in conformity with the result of the monitoring, it is inventively proposed that the lubricating gap thickness, i.e., the distance between the bearing surface of the sliding bearing shoe and the running surface of the rotating drum supported thereon via the lubricating gap or, respectively, the compressed oil film, is directly measured during operation and the rotating drum operation is controlled dependent on this measured quantity.

Abstract: A glide bearing for a roll having hydrostatic bearing elements provided with bearing shoes fitted to be positioned around a neck of the roll axle in order to support the axle and thus the roll revolvingly with respect to a frame member, such as a bearing block. The bearing elements are hydraulically-operating piston-cylinder devices which may be loaded by a hydraulic pressure medium such that the bearing shoes are able to be positioned freely around the neck of the axle. In one preferred application, the bearing elements are arranged so as to enable displacement of the roll for closing and opening a nip formed in part by the roll.

Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.

Abstract: Liquid ring pumps with rotating canisters are supported by at least one radial fluid bearing pad. The bearing fluid is either a gas or a liquid. The radial fluid bearing pads can be of either the hydrodynamic or hydrostatic type. Holes in each bearing pad are used to introduce bearing fluid to the clearance between the rotating canister and the housing of the pump. Each radial bearing pad can be mounted to the housing using a ball joint or a bladder. Access ports formed in the housing provide access to the radial bearing pads. Axial fluid bearings are mounted to the housing using shims or threaded bolts so that the axial position of the axial bearings can be adjusted.

Abstract: A wire or felt forming section of a paper-making machine has breast rollers for guiding a respective one of two forming wires. The two rollers are disposed with a pulp gap formed between the two rollers and the wires are disposed just downstream of a pulp suspension ejecting nozzle of a headbox. Each roller is supported against the respective taut forming wire by a hydrostatic bearing. The hydrostatic bearing has two circumferentially separated resiliency chambers provided in a combined region of resiliency disposed over an arc of the circumference of the roller. A sealing strip after the region of resiliency prevents fluid from contacting the wire.

Abstract: A bearing for a heated calendar roll comprises a bearing ring having a first surface. The bearing is rotatable about an axis. A first radially fixed hydrostatic bearing arcuate segment has a first surface which mates with the first surface of the bearing ring. The hydrostatic bearing has at least one bearing pocket. The bearing pocket has a device for permitting hydraulic fluid to flow into the at least one bearing pocket. The hydrostatic bearing is disposed substantially at a circumferential position with respect to the bearing which corresponds to a bearing load from the calendar roll. A second hydrostatic bearing arcuate segment has a first surface which mates with the first surface of the bearing ring. The second hydrostatic bearing has a first radially adjustable bearing pocket. The radially adjustable bearing pocket has a device for permitting hydraulic fluid to flow into the radially adjustable bearing pocket.

Abstract: A bearing assembly for supporting a drive shaft as of a ship wherein the shaft is generally to be supported by such bearing assembly in a horizontally extending position. The bearing assembly has a housing with a cylindrical shell mounted therein having a central bore with a longitudinally extending central axis. The shell may either have a first set of circumferentially spaced staves that are not evenly spaced circumferentially to support the drive shaft, or have a first set and a second set of staves that are circumferentially spaced such that the first set contact the drive shaft while the second set do not contact the drive shaft under normal conditions of load. All of the staves have resilient elastomeric strips that project into the central bore of the shell.

Abstract: A wire or felt forming section of a paper-making machine has breast rollers for guiding a respective one of two forming wires. The two rollers are disposed with a pulp gap formed between the two rollers and the wires are disposed just downstream of a pulp suspension ejecting nozzle of a headbox. Each roller is supported against the respective taut forming wire by a hydrostatic bearing. The hydrostatic bearing has two circumferentially separated resiliency chambers provided in a combined region of resiliency disposed over an arc of the circumference of the roller. A sealing strip after the region of resiliency prevents fluid from contacting the wire.

Abstract: This invention relates to an apparatus for sorting round bearings according to their diameters, having a pair of elongated sorting cylinders which are supported on diverging longitudinal axes. Each of the cylinders are supported near each end of the cylinders by upper and lower bearing blocks which extend about a portion of the upper and lower circumference of the cylinders. The lower bearing block is provided with air under pressure for forming an air cushion between the curved surface of the bearing block and the circumferential surface of the cylinders to support the cylinder with little or no friction. Each of the sorting cylinders are also supported by a support shaft which extends beyond the ends of the cylinders. This shaft is supported by self-aligning bearings which, in turn, are supported by a stabilizer mechanism which permits limited vertical motion of the shaft and the cylinder. The shaft is permitted to rise vertically at a faster rate than it is permitted to fall vertically.

Abstract: A fluidic support device is described that counteracts the gravitational bending moment present in a substrate tube during a modified chemical vapor deposition preform fabrication process. Hence, use of this device results in the production of a straight optical fiber preform. The device includes a hemicylindrical annulus section in close proximity to the portion of the substrate tube to be supported, and uses flowing fluid to offset gravity and to center the substrate tube. Gaseous use of the device increases and stabilizes the thermophoretic force without contact by either solid or liquid materials, avoiding any reduction in strength of the finished fiber.

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: The invention relates to a hydrodynamic bearing in which a pressure limiting valve is connected to the oil supply to a groove provided at the inlet zone of the bearing element. The oil pump thus can be of considerably smaller dimensions than heretofore, the energy consumption in operation is reduced, and the removal of heat is improved.