Abstract: A hydrodynamic slide bearing (10, 10?) supports a shaft (14, 14?) that is mounted rotatably. The hydrodynamic slide bearing (10,10?) comprises a plurality of bearing segments (12, 12?) arranged next to one another in the rotation direction (22, 22?). The segment surfaces together form a running surface (16, 16?) for the shaft (14, 14?). At least one bearing segment (12, 12?) has a plurality of grooves (26, 26?) disposed in its segment surface, and the grooves (26, 26?) are orientated substantially transverse to the rotation direction (22, 22?). The rear groove edges (261) in the rotation direction (22, 22?) are orientated obliquely to their respective assigned radial plane (24, 24?) and are undercut in relation to their respective assigned radial plane (24, 24?). The front groove edges (262) in the rotation direction (22, 22?) are not undercut and are orientated obliquely to their respective assigned radial plane (24, 24?).

Abstract: A method for producing a plain bearing bush includes providing a flat supporting metal layer and an anti-friction layer on this supporting metal layer to produce a flat composite material. The flat composite material is then rolled into the shape of the plain bearing bush in such a way that the supporting metal layer in the plain bearing bush is disposed radially underneath the anti-friction layer. The plain bearing bush includes the supporting metal layer disposed underneath the anti-friction layer in the radial direction.

Abstract: A roller for deflecting or guiding a metal strip to be coated in a metal melt bath may include bearing journals disposed coaxially with one another for rotationally supporting the roller. To obtain a high coating quality while hot-dip coating the metal strip, in particular steel strip, and to increase the service life of such a roller, each bearing journal may comprise a plurality of axially spaced annular elevations that have or are formed from a plain-bearing coating. The roller may comprise a steel roller shell, and each bearing journal may include a substantially cylindrical or circular-disk-shaped connecting steel portion that extends radially in the direction of the roller shell. At least one of the connecting portions may comprise a passage opening at an end face of the roller shell. The passage may be closed by means of a gas-permeable plug element comprised of ceramic material.

Abstract: Products and methods are provided for controlling thermal expansion. In various exemplary embodiments, a structure includes a body constructed of a material exhibiting a first coefficient of linear thermal expansion. A component is disposed inside the body and exhibits a second coefficient of linear thermal expansion that is lower than the first coefficient of linear thermal expansion. A layer is wrapped around the body and constrains thermal expansion of the body. The layer includes a composite containing fibers that are aligned with one another to constrain expansion in a desired direction or in multiple directions. The layer is independently useful to provide a retention function for the body.

Abstract: A water lubricated composite thrust bearing of a nuclear main pump has a stainless steel base and an engineering plastic layer. The stainless steel base is provided with a concave-convex surface connected to the engineering plastic layer. The concave-convex surface and the engineering plastic layer are compositely molded by means of thermoplastic compound molding. A ratio of the area of the concave-convex surface to the area of an orthographic projection of the concave-convex surface on the stainless steel base ranges from 1.2 to 2. By means of the concave-convex surface and a specific bonding property obtained after fusion of a rough face and the engineering plastic layer, the concave-convex surface is bonded with the engineering plastic layer, thereby forming a reliable composite thrust bearing that is physically connected onto a whole.

Abstract: A bearing apparatus for mounting a camshaft in a cylinder head of an internal combustion engine may include a bearing element that surrounds a bearing ring in which the camshaft is rotatably mounted or mountable. The bearing element may be made of a first material whose expansion coefficient is greater than an expansion coefficient of a second material of which the bearing ring is made. An outer surface of the bearing ring may include a contour that engages in a form-fitting manner with a mating contour formed on an inner surface of the bearing element that surrounds the bearing ring. The contouring formed by the contour and the mating contour may form retaining structures that brace against one another in instances of thermal expansion.

Abstract: A connecting rod for converting a linear motion of a piston into a rotational motion of a crankshaft may include a small connecting eye for connecting the connecting rod in a rotatable manner to a pin of the piston and a large connecting rod eye for connecting the connecting rod in a rotatable manner to the crankshaft. The connecting rod may include at least one eccentric lubricating groove disposed in at least one of an inner face of the large connecting rod eye, an inner face of the small connecting rod eye, and a bearing bush arranged in the small connecting rod eye. The at least one groove may have an axis inclined with respect to an axis of at least one of the respective small connecting rod eye, large connecting rod eye, and bearing bush.

Abstract: A system, in certain embodiments, includes a composite piston. The composite piston comprises a piston body made of a composite material, wherein the composite material comprises a reinforcing material distributed in a matrix material.

Abstract: A system, in certain embodiments, includes a piston clamping system including a piston rod comprising a piston rod shoulder and a piston rod nut coupled to the piston rod, wherein the piston rod nut and the piston rod shoulder are configured to axially capture first and second body portions of a piston therebetween.

Abstract: A burnishing unit includes a housing having a bore extending therethrough. The bore has a first end portion and a second end portion. A first fluid port and a second fluid port are provided on the housing, each fluid port is in communication with the bore. The first fluid port introduces hydraulic fluid to the bore and the second fluid port allows hydraulic fluid to escape from the bore. A removable sleeve is positioned in one of the first end portion and second end portion of the bore. The sleeve includes a sidewall having an opening in communication with the bore and the first fluid port. A hydraulic fitting positioned in the first fluid port has a proximal end portion adapted to receive a hydraulic conduit and a distal end portion. The distal end portion is adapted to sealingly engage the sidewall of the sleeve around the opening provided therein.

Abstract: A method for combining a sleeve and bearings, comprising the steps of: providing a base having a sleeve; disposing at least one bearing in the sleeve; and providing a laser beam to illuminate and melt a contact place between the perimeter of the bearing and the sleeve such that the bearing and the sleeve is combined firmly. Therefore, the effects of securing the bearings, reinforcing the structure thereof, and increasing the lifetimes of the bearings and the sleeve can be achieved.

Abstract: A fabrication method is provided for use in making a component. The fabrication method may include generating a laser beam at a first orientation relative to a wear surface of the component to produce a first laser beam spot having a first characteristic, and feeding a cladding material into the first laser beam spot to produce a cladding layer on the wear surface. The fabrication method may also include generating a laser beam at a second orientation relative to the wear surface of the component to produce a second laser beam spot having a second characteristic, and moving the second laser beam spot along the cladding layer to substantially flatten the cladding layer.

Abstract: There is disclosed a split bearing comprising a semi-cylindrical bearing member having a concave bearing surface extending throughout the length thereof to a parting face at each opposed circumferential end of the bearing member. The bearing surface has formed thereon a sprayed bearing overlay extending over the whole bearing surface except for crush relief regions adjacent to the parting faces. The bearing member has a substantially constant outer diameter and inner diameter except at the crush relief regions, where the inner diameter is larger than at other regions of the bearing surface. There is also disclosed a method of making such a bearing. Less overlay material is required than in conventional split bearings.

Abstract: In a cold rolling method for producing annular composite workpieces, at least two hollow cylindrical workpieces made of different materials are inserted into one another. The at least two hollow cylindrical workpieces are roll formed by pressing the at least two hollow cylindrical workpieces against each other between two diametrically opposed external roll forming tools and an internal rolling arbor or between two diametrically opposed external roll forming tools and an internal roll forming tool to form a composite workpiece. The composite workpiece is a bearing ring or a gear ring. One of the hollow cylindrical workpieces can be a nonferrous material such as aluminum.

Abstract: The object of this invention is to provide a hybrid composite journal bearing which is constructed so that a composite liner is positioned on an inner surface of a metal housing having a circular cross-section, thus preventing a journal from being broken or damaged or seized to the bearing, due to friction between the metal or composite journal and the journal bearing. The hybrid composite journal bearing (210) includes a metal housing (211) which is secured on an outer surface thereof to a bearing system and has a circular cross-section. A composite liner (212) is laminated to an inner surface of the metal housing (211) with a uniform thickness so as to minimize friction between the journal bearing and a journal.

Abstract: A cylindrical sliding bearing 1 can rotatably support a rotational shaft by a sliding surface 4 (inner circumferential surface). A crowning 5 having a sloped surface is formed at both ends of the sliding surface 4 in the axial direction. The crowning 5 includes a first crowning 3A formed of a sloped surface of a lining layer 3 and a second crowning 2A formed of a sloped surface of a back metal 2 positioned on the lower side of the first crowning. Unlike a conventional sliding bearing, the back metal 2 where the crowning 5 is positioned is provided as a sloped surface (2A). As compared with conventional bearings, the crowning 5 can be prevented from being unevenly brought into contact with the rotational shaft.

Abstract: A process for manufacturing a bearing. The bearing may be used in a tool disposed within a bore hole. The process comprises providing a tubular sleeve and applying a hard facing material on the outer diameter of the tubular sleeve so that the hard facing material is fused onto the outer diameter, and thereafter applying a material layer on the outer diameter so that the material layer is fused onto the outer diameter. The method further includes machining the outer diameter so that a portion of the material layer is removed, and then machining the inner diameter so that only the hard facing material is left as an inner diameter. The method further includes machining the outer diameter and the inner diameter in order to form the bearing. In the most preferred embodiment, the method further includes placing the bearing into a housing, and inserting a mandrel into the bearing, and wherein a hard coating of the mandrel abuts the bearing. A mud motor for rotating a bit in a well bore is also disclosed.

Abstract: The object of this invention is to provide a hybrid composite journal bearing which is constructed so that a composite liner is positioned on an inner surface of a metal housing having a circular cross-section, thus preventing a journal from being damaged or seized to the bearing, due to friction between the metal or composite journal and the journal bearing. The hybrid composite journal bearing (210) includes a metal housing (211) which is secured on an outer surface thereof to a bearing system and has a circular cross-section. A composite liner (212) is laminated to an inner surface of the metal housing (211) with a uniform thickness so as to minimize friction between the journal bearing and a journal.

Abstract: A lined and flanged bush and method of manufacturing the same comprising: providing a liner having an aperture; locating the aperture in the liner around the spigot such that the liner lies on the surface; and stamping out the blank around the spigot to provide a lined and flanged bush.

Abstract: Internal combustion engine with bearing shells, which are formed essentially by thermal sprayed bearing layers, wherein the thermal sprayed bearing layers are formed by at least two slide bearing materials with different hardness, which are spatially separated from each other and are provided on the outer surface of the bearing shell, as well as process for production of bearing shells for internal combustion engines including the steps: mechanical conditioning of the bearing surface coating of the bearing surface with the materials of the bearing shell by thermal spray processes finishing flattening processing of the applied layer wherein as bearing shell at least two slide bearing materials with different hardness were deposited separated spatially from each other, wherein the materials are in contact with each other via interlayers or joint layers.

Abstract: A journal bearing has a lining of bearing metal applied to a steel backing. The surface of the lining is laser peen hardened to locally increase the hardness and the seizure resistance of the lining. The underlying core of the lining is unaffected and maintains good conformability of the lining. The overall lining thus possesses both good seizure resistance and conformability.

Abstract: The present invention provides a flanged bush including a substantially cylindrical body portion, a radial flange portion, and an undercut region disposed within a surface of the body portion and the flange portion, wherein the undercut region is operable for relieving stresses present in the surface of the body portion and the flange portion. The present invention also provides a flanged bush including a substantially cylindrical body portion and a pair of substantially semi-circular members, wherein the pair of semi-circular members form a radial flange portion of the flanged bush. The present invention further provides a method for the manufacture of a flanged bush including providing a substantially cylindrical structure, bending an end portion of the structure 45 degrees, and bending the end portion 90 degrees. The method also including bending the end portion of the structure past 90 degrees and allowing the end portion to return to 90 degrees.

Abstract: A bushing utilizes a fabric reinforced thermoset composite sleeve incorporated within an outer shell in a construction enabling the sleeve to be press-fitted within the shell and held therein by a constriction in the shell bore which is embraced by the bearing liner. Following installation of the bearing sleeve, the sleeve bore may be reamed to provide a uniform inside diameter.

Abstract: This invention relates to a self-lubricating bearing and a method of producing the same. The self-lubricating bearing includes a main body and a plurality of solid lubricant pieces. The main body has an inner annular wall surface, an outer annular wall surface, and a through hole defined by the inner annular wall surface. The solid lubricant pieces are embedded in a plurality of depressions of the inner annular wall surface by coating and grinding and each has a radial inside annular surface in a curve conforming to that of the inner annular wall surface. The forming of the depressions without radially penetrating through the outer annular wall surface to make the solid lubricant pieces embedded into the depressions with less amount by coating and grinding allows the self-lubricating bearing to reduce the material cost, and keep its structural strength and lubricating effect simultaneously.

Abstract: A method of manufacturing sliding bearings of the type in which a sliding guide surface is formed by using a resin liner, including fixing a thermosetting resin, which constitutes the resin liner, on the whole or a part of a sliding guide surface of a first member by an injection molding operation using the first member as a core, thereafter molding a second member, which covers a sliding guide surface of the first member, by a metal molding operation with the resin liner-fixed first member placed firmly as a core in a metal mold, and thermally curing the resin liner with the heat working on the sliding surface of the first member during the molding of this second member.

Abstract: The present invention relates to a copper base alloy suitable for use in bearing structures. The copper base alloy consists of from about 15 wt % to about 90 wt %, preferably from about 50 wt % to about 60 wt %, silver and the balance essentially copper. The copper base alloy is advantageously applied to a surface of a component used in the bearing structure such as a surface of a bushing.

Abstract: A plain bearing for necks of rolls of rolling mills includes a bearing bushing of metal and a plain bearing alloy introduced into the bushing. The plain bearing alloy is based on tin with antimony and copper and contains of 6.8 to 7.2 percent by weight antimony, 6.3 to 6.7 percent by weight copper, 0.5 to 0.7 percent by weight zinc, 0.05 to 0.15 percent by weight silver, and tin as the remainder, and wherein the plain bearing alloy is applied to an inner mantle of a pre-heated bearing bushing as a rough layer thickness of 4 to 5 mm by centrifugal casting.

Abstract: The hydrostatic fluid bearing comprises a cylindrical stator having orifices for introducing a fluid under pressure, on its inside surface the stator has a split ring constituted by an assembly comprising a plane metal plate and a layer of self-lubricating composite material. The layer of composite material has cells for surrounding orifices for introducing fluid under pressure, once the assembly has been put into place inside the stator.

Abstract: Prior to forming a thermal spray coating layer (28) on an end face (23B′) of a structural base material (23′) to be shaped into a boss, firstly an inner masking member (32) is fitted in an original hole (23A′) of the structural base material (23′) and then an outer masking member (33) is fitted on outer peripheral side of the structural base material (23′). In the next place, by the use of a hard material, a thermal spray coating layer (28) is formed on an annular coating area (23B1′) which is exposed between the inner and outer masking members (32) and (33). Surface areas on the end face (23B′) of the structural base material (23′), corresponding to an allowance range of a machining operation by which the original hole (23A′) is ultimately shaped into a joint pin hole of a specified diameter, are left as a non-coating area (23B2′) free of the thermal spray coating layer (28).

Abstract: A method of making a spherical bearing including the steps of forming an outer bearing member with an inner concave spherical bearing surface, forming a second member with an outer convex spherical bearing surface, cutting the second member along a diametric plane to provide first and second inner bearing segments respectively including first and second outer spherical bearing surface segments, inserting the first inner bearing segment within the outer bearing member so as to fully engage the first outer spherical bearing surface segment with the inner concave spherical bearing surface, and inserting the second inner bearing segment within the outer bearing member so as to fully engage the second outer spherical bearing surface segment with the inner concave spherical bearing surface.