Abstract: A bearing lubrication system includes a bearing assembly comprising a duplex bearing including an outer ring, an inner ring positioned radially inward from the outer ring, and two sets of circumferentially distributed rolling elements between the inner and outer rings. The bearing assembly further includes a housing radially surrounding the duplex bearing and including a lubricant flow passage in fluid communication with a source of lubricant. A flow orifice is located downstream of the lubricant flow passage for jetting the lubricant into the duplex bearing. The flow orifice has an axial location between the two sets of rolling elements.

Abstract: The present invention relates to wind turbine generator (WTG) with a ball bearing (31) supporting a rotating shaft. A suction provider (35), e.g. a rotating disc, is provided next to the ball bearing. An opposite grease reservoir (41) supplies the ball bearing with grease during rotational operation, the grease reservoir further having a shape so that a point (43) of the at least one grease reservoir being closest to the rotating shaft and a grease inlet of the ball bearing are adjoining. The suction provider creates a pressure which is slightly lower than atmospheric pressure, thereby creating a suction of grease (47) through the ball bearing from the grease reservoir, which aids in distributing the grease in the ball bearing. The invention provides an improved ball bearing having an extended lifetime of up to e.g. 7-10 years.

Abstract: An air bearing includes: a main body part having a bearing surface facing a guide surface; a flow path part provided in the main body part; an air film forming part that supplies compressed air flowing through the flow path part to the guide surface to form an air film; a negative pressure generating part that sucks air between the bearing surface and the guide surface, the negative pressure generating part being provided in the flow path part; a discharge path in communication with the flow path part; and a flow rate adjusting part that adjusts a flow rate of air flowing from the flow path part to the discharge path in accordance with a compressed air pressure corresponding to a load applied to the main body part.

Abstract: [Object] To efficiently supply lubricant oil to a bearing member with a simple mechanism. [Solving Means] A vacuum pump includes a first housing, a second housing, a rotor shaft, a lubricant oil-stirring plate, and a bearing member. The second housing is attached to the first housing and forms a space that stores lubricant oil together with the first housing. The rotor shaft passes through the first housing. The lubricant oil-stirring plate is housed in the space and is attached to the rotor shaft. The bearing member is fixed to the first housing and rotatably supports the rotor shaft. The first housing includes a supply port that enables lubricant oil to be supplied to the bearing member. The second housing includes an inner-wall upper portion which the lubricant oil stirred by the lubricant oil-stirring plate hits against. The inner-wall upper portion of the second housing includes a recess portion that enables the lubricant oil to move above the supply port.

Abstract: A rolling-element bearing assembly includes a rolling-element bearing and an oil conditioning system for conditioning oil used to lubricate the bearing. The bearing has an inner ring and an outer ring and a plurality of rolling elements rotatably disposed between the inner ring and the outer ring. The bearing includes openings for discharging oil from the bearing and for introducing oil into the bearing, and the openings are connected to the oil conditioning system. A raceway of the inner ring and/or a raceway of the outer ring is coated with a first coating, and the rolling elements are at least partially coated with a second coating that is different from the first coating.

Abstract: A rolling bearing with an inner ring and an outer ring which is rotatable about a rotation axis relative to the inner ring, or with an outer ring and an inner ring which is rotatable about a rotation axis relative to the outer ring, and with at least one sealing element arranged between the inner ring and the outer ring for sealing an interior of the rolling bearing which can be filled with a lubricant. The rolling bearing includes a conveying element for conveying the lubricant which is arranged on the one of the inner ring and outer ring so as to be rotatable about the rotation axis of the rolling bearing and in such a way that a play exists between the conveying element and the other of the inner ring and outer ring.

Abstract: An improved power end for a singie-stage end suction centrifugal pump having a seated environment and improved lifespan.

Abstract: A rolling bearing apparatus includes a bearing main body having an outer ring that is a fixed ring and an inner ring that is a rotating ring, the outer ring and the inner ring being concentrically provided, and a plurality of rolling elements provided between the outer ring and the inner ring, and a control unit having a vibration detector attached to the outer ring and a calculation unit that calculates a value for vibration of the bearing main body and a rotation speed thereof based on a detection signal from the vibration detector. The calculation unit calculates the rotation speed based on frequency components of vibration obtained from the detection signal and the number of vibrations inherent in the bearing main body.

Abstract: A hydrostatic axial piston machine (1) has a housing (2), a rotatable drive shaft (4) mounted in the housing (2) by a bearing device (5) that comprises at least one roller bearing (5a; 5b), a cylinder drum (7) having at least one piston bore (8), and a longitudinally displaceable piston (10) in each piston bore. A spray jet lubrication system (50) for the roller bearing (5a; 5b) includes at least one lubricant spray jet (51a; 51b) directed toward the area of an axial edge (30; 32) of an inner ring (5c; 5d) of the roller bearing (5a, 5b) with which the roller bodies of the roller bearing (5a, 5b) are in contact via an end surface.

Abstract: A bearing lubrication apparatus for use with a piece of rotating equipment includes a lubrication device having a bearing chamber with bearings located in the bearing chamber, a mist generating unit positioned below the bearing chamber and being in fluid communication with the bearing chamber, at least one mist inlet directed into the bearing chamber and being in fluid communication with the mist generating unit, and a coalescing unit adjacent the bearing chamber.

Abstract: A bearing assembly for a transmission of a vehicle, including: a gearwheel; a gearshaft; and a double-row, asymmetrical tapered roller bearing between the gearwheel and the gearshaft, in an O arrangement and including a first row of tapered rollers, which adjoins a shaft end and a second row of tapered rollers, which adjoins the first row of tapered rollers. The first and second rows of tapered rollers are arranged between a shared outer ring arranged on the gearwheel and separate, dedicated inner rings arranged on the gearshaft. A first acute contact angle on the first row of tapered rollers is not equal to a second acute contact angle on the second row of tapered rollers. The first contact angle is at least 3° less than the second contact angle. A difference between the second contact angle and the first contact angle is at most 10°.

Abstract: The invention relates to a method for lubricating and cooling a bearing that is subject to high loads and to a device for carrying out said method. The invention is characterized by dissolving a lubricant in a supercritical gas that is cooled down to a low temperature and feeding the gas/lubricant mixture to the baring. The gas/lubricant mixture is relaxed in the bearing area, thereby releasing the lubricant and lubricating the bearing. The now subcritical gas that is cooled down to a low temperature is used for cooling and is discharged to the exterior. The gas used is carbon dioxide (CO2) and the lubricant is a hydrocarbon-based lubricant.

Abstract: A rolling bearing includes: a first raceway member having a first annular raceway surface; a second raceway member having a second annular raceway surface opposing the first raceway surface; a plurality of rolling elements arranged between the first raceway surface and the second raceway surface so as to roll; and a guide member formed integrally with or separately from the second raceway surface. The guide member including: an annular guide surface arranged at a position different form the second raceway surface in an axial direction; a plurality of flow paths which are separately provided in the axial direction and in which compressed air for supplying lubricating oil flows; and discharge openings which spray the compressed air to a guided surface. An annular cage that holds the plurality of rolling elements at given intervals in a circumferential direction and has the guided surface which opposes the guide surface such that the guided surface can slidably contact the guide surface.

Abstract: The invention relates to a centrifugal separator having a bearing device and a lubricating device comprising a rotatable pump device. The pump device comprises a lubricant inlet to receive lubricant from a lubricant reservoir, and a duct to convey lubricant to an outlet device for delivering at least part of said lubricant in the form of lubricant mist through at least one lubricant outlet. The pump device further comprises a gas inlet and the outlet device comprises a gas outlet, whereby during rotation of the pump device a gas flow is maintained from the gas inlet to the gas outlet bringing along lubricant present in the duct towards the outlet device. The centrifugal separator further comprises a housing which surrounds the bearing device and the lubricating device and which allows lubricant mist to pass from the lubricating device to the bearing device in order to lubricate the latter.

Abstract: A rolling element bearing includes a plurality of rolling elements disposed between at least one bearing inner ring and at least one bearing outer ring. A cage retains and guides the rolling elements between the at least one bearing inner ring and the at least one bearing outer ring. An annular extension extends from the cage. The annular extension has a rectangular contour when viewed in radial cross-section and has a surface roughness (Ra) less than seven ?m. The annular extension extends at least three millimeters into lubricating oil disposed in an oil reservoir adjacent to the annular extension and generates an oil mist when one of the at least one bearing inner ring and at least one bearing outer ring rotates relative to the other.

Abstract: There is provided a rolling bearing including an inner ring having an inner ring raceway surface, an outer ring having an outer ring raceway surface and a shoulder portion formed on one axial side of the outer ring raceway surface, a plurality of rolling elements which roll between the inner ring raceway surface and the outer ring raceway surface, and a cage adapted to hold the plurality of rolling elements at predetermined intervals in a circumferential direction and having a guided surface which confronts the shoulder portion of the outer ring in such a manner as to be brought into sliding contact therewith. The rotation of the cage is guided through sliding contact of the guided surface of the cage with a guiding surface of the shoulder portion of the outer ring. A guiding space which is a radial space between the guiding surface of the shoulder portion of the outer ring and the guided surface of the cage is made to increase as approaching the rolling elements.

Abstract: In a tool spindle device, a tool head is slidably guided along guide members on a support table and is movable by a tool head feed mechanism. A tool spindle with a machining tool such as grinding wheel attached thereto is rotatably supported through antifriction bearings in the tool head. A lubrication mechanism is provided in the tool head for lubricating the antifriction bearings with oil air or oil mist. A space section is formed between the support table and the tool head to house the tool head feed mechanism and the guide members therein. A release passage is provided for releasing the oil air or the oil mist after lubricating the antifriction bearings, into the first space section therethrough to lubricate the tool head feed mechanism and the guide members housed in the space section.

Abstract: A shaft (1a-d) is provided that is rotatably mounted by a journal (2) in a housing (4) in which lubricant mist is provided. One or several outward-extending ribs (6) extend between the journal and shaft sections (5a, 5b) adjacent to the journal. The shaft is mounted by the journal in the housing using a rolling bearing (3) that is lubricated exclusively by the lubricant mist. At least one of the ribs associated with the journal extends at a certain angle of attack (11, 12) to the axis of rotation of the shaft and is used as a blade for conveying the lubricant mist into the rolling bearing.

Abstract: A bearing device in which an inner ring is sealed from an outer ring by seals and together with the outer ring forms a closed bearing unit with a built-in circulation circuit for a lubricating oil mist. Rolling elements and rolling tracks disposed in the circulation circuit and lubricated by the oil mist. Means are adapted to forming an oil mist of lubricating oil from a reservoir, and means are adapted to causing the oil mist to flow in the circulation circuit. The invention also relates to an application of the bearing device for rotatably supporting a rotor in a centrifugal separator and to a method for supporting a centrifugal separator rotor for rotation about an axis of rotation.

Abstract: In an outer ring, a plurality of lubrication oil flow paths which penetrates from an outer circumference surface of the outer ring to an inner circumference surface (in particular, raceway groove) are provided. Opening positions of the each lubrication oil flow paths are made different in a width direction being orthogonal to a rolling direction of a ball. At least one of the lubrication oil flow paths is used as a lubrication oil supply path, and a lubrication oil discharge path is selected from the other lubrication oil flow paths to adjust a range of lubrication oil amount, so that an amount of lubrication oil in the raceway groove is controlled.

Abstract: The present invention relates to a bearing device in which an inner ring is sealed from an outer ring by seals and together with the outer ring forms a closed bearing unit with a built-in circulation circuit for a lubricating oil mist. Rolling elements and rolling tracks disposed in the circulation circuit and lubricated by the oil mist. Means are adapted to forming an oil mist of lubricating oil from a reservoir, and means are adapted to causing the oil mist to flow in the circulation circuit. The invention also relates to an application of the bearing device for rotatably supporting a rotor in a centrifugal separator and to a method for supporting a centrifugal separator rotor for rotation about an axis of rotation.

Abstract: A rotary apparatus comprises a non-rotary part, a rotary shaft, a rotary member between the rotary shaft and the non-rotary part, an inside bearing between the rotary shaft and the rotary member, and an outside bearing between the rotary member and the non-rotary part. The inside bearing comprises first and second inside bearings spaced along a direction of a central axis of the rotary shaft. The outside bearing comprises first and second outside bearings spaced along the rotary shaft. An outer ring of the first inside bearing and an inner ring of the first outside bearing, and an outer ring of the second inside bearing and an inner ring of the second outside bearing, are fixed on the rotary member. By interlocking of the bearings, the rotary member slightly moves along the central axis, and at least two of the bearings receive respective preloads with a linkage relationship.

Abstract: A fluid multiplexer for delivering lubricant to bearings in a gas turbine engine. The bearings are adjacent bearing races on a shaft. Lubricant passages within the shaft extend from the races to scoops on the surface of the shaft. A nozzle ejects a jet of lubricant across open space toward the scoops. As the shaft rotates, the scoops sequentially cross the jet, each scoop collecting a charge of lubricant, which it delivers to its passage.

Abstract: A high speed antifriction bearing receives minute quantities of high performance grease or oil at selected intervals from an electrically controlled injector having a nozzle that is directed at the rolling elements of the bearing. By minimizing the lubricant in the bearing, the lubricant does not accumulate in quantities that render it susceptible to working. The high performance lubricant produces a boundary layer film between contacting critical surfaces within the bearing. That film is so thin that it has little capacity to churn or work and produce heat. The injector may be the type used for electronic injection of diesel fuel into the cylinders of diesel engines.

Abstract: A rolling bearing for an HDD being excellent in the resistance to fretting wear, capable of lowering the torque and relieving the torque change and having a long life while exerting no undesirable effect on various bearing properties. A rolling bearing for hard disk drives wherein a cage 7 supports a plural number of rolling elements 5 located between an inner ring 2 and an outer ring 4 and sealing members 6,6 fixed to the both ends in the axial direction of one of said inner ring 2 and said outer ring 4 are opposite to each other, wherein a lubricating oil has been injected into the bearing space formed between said sealing members 6,6 at the both ends in the axial direction so as to amount to 1 to 50% by volume of the bearing space.

Abstract: A bearing lubricating device includes: an oiling mechanism for supplying a predetermined amount of lubricating oil to a shoulder peripheral surface of a race ring of a rolling bearing located on a side of a raceway surface of the race ring of the rolling bearing; and air jetting mechanism for jetting air so as to transfer the lubricating oil on the shoulder peripheral surface toward an interior of the bearing, wherein the air jetting mechanism has a receiving space formed in a side member disposed on a side of and adjacent to a nonrotating race ring of the bearing so as to receive air from an outside as well as an air jetting slit communicating with the receiving space, the air jetting slit having an annular shape concentric with the race ring and substantially continuous in a circumferential direction and being formed to be open in such a manner as to be oriented toward the interior of the bearing.

Abstract: A machine with bearing-mounted rotors includes a housing (1) and two cooperating rotors erected therein which are supported on bearings (8-9 and 11-12, 17-18 and 20-21, respectively) with shafts ends (5 and 5A, 14 and 14A, respectively) at their ends. The shaft ends (5, 14, respectively) of each of the rotors (2 and 3) rest in a pair of bearings (8-9, 17-18, respectively). The bearings (8 and 9) of the one pair are situated opposite the bearings (17 and 18) of the other pair. At least one spray element (27) is erected between the bearings (8 and 9, 17 and 18, respectively) of the pairs (8-9 and 17-18) for spraying lubricating liquid on the bearings (8-9-17-18). Between the bearings (8 and 9, 17 and 18, respectively) of each pair (8-9 and 17-18), a ridged ring (35, 35A respectively) is provided around the shaft and (5, 14, respectively). Each ridged ring (35, 35A) is provided with a protruding ridge (36, 36A, respectively) on its entire outer perimeter.

Abstract: An oil air distributor is inserted in the inside of a support hole provided in a housing. The oil air distributor is designed so that outer pipes and a spacer fitted onto an inner pipe are held, through seal rings, between a flange portion provided in the inner pipe and a supply plug. In a condition in which the seal rings are compressed axially, the second oil-supply hole provided in the supply plug is communicated with branch passages provided in the housing. Further, a plurality of inner-pipe-side small holes provided in the inner pipe are opened substantially horizontally in vertically even-level positions.

Abstract: A configuration of lubrication nozzle including a large flow path to connect external oil supply tube with semi-circle cross section annular flow path, and three jet flow conduits with L form having interval of 120.degree. between adjacent channels to link annular flow path and outlet is created for oil-air or oil-mist lubrication system for high speed rolling-element bearings.

Abstract: A roller bearing including inner and outer races defining an interior space therebetween, and a plurality of cylindrical rollers between the races, each race having opposite axial end surfaces, a seal situated at each end of the bearing, each seal including a loosely fitting flange ring extending radially between the races, the ring having an inner axial surface facing the axial end surface of the inner race, thereby defining facing end surfaces, the ring and the inner race respectively having bore surfaces, the inner race having at least one hole extending generally radially from the bore thereof to the interior space for supply lubricant to the interior space, and pressure equalizing passages communicating the interior space with the exterior of the bearing, the openings comprising at least one passage in one of the facing surfaces and at least one axial passage axially traversing the ring.

Abstract: A roller bearing including inner and outer races defining an interior space therebetween, and a plurality of cylindrical rollers between the races, each race having opposite axial end surfaces, a seal situated at each end of the bearing, each seal including a loosely fitting flange ring extending radially between the races, the ring having an inner axial surface facing the axial end surface of the inner race, thereby defining facing end surfaces, the ring and the inner race respectively having bore surfaces, the inner race having at least one hole extending generally radially from the bore thereof to the interior space for supply lubricant to the interior space, and pressure equalizing passages communicating the interior space with the exterior of the bearing, the openings comprising at least one passage in one of the facing surfaces and at least one axial passage axially traversing the ring.

Abstract: A system level automation tool for system design using a computer is operable to generate a first set of objects each defining a portion of the system. The objects have a parent-child relationship wherein one or more child objects each define a portion of the parent object. A second set of implementable objects is associated with the first set of objects using a transitional mapping (TRAM) describing the relationships between the first and second sets of objects.

Abstract: A high speed anti-friction bearing includes an internal impeller mechanism to provide improved high speed lubrication for the anti-friction elements. At high bearing speeds the impeller mechanism scoops liquid lubricant from a liquid annulus centrifugally generated on the outer wall of the bearing. The scooped liquid is hurled inwardly onto the anti-friction elements as a fine mist. The bearing lubrication process is achieved with minimum heat generation and minimum energy loss insofar as the anti-friction elements do not plow through large masses of lubricant.

Abstract: The bearing arrangement is suitable in particular for the mounting of molds for the production of plastic pipes by the centrifugal molding process. It has a ball bearing whose inner bearing ring (5) sits on the pipe (3) which is to be freely rotatably mounted and whose outer bearing ring (7) is held in a support ring (13). Covering rings, one (17, 19) of which on each bearing side is coordinated with the inner (5) bearing ring and one (11, 12) with the outer (7) bearing ring, serve for protection from water and humidity. These covering rings (17, 18, 11, 12) are such that, in pairs, they form a labyrinth seal. The covering rings (11) coordinated with the outer, i.e. the fixed, bearing ring (7) are provided with an injection nozzle (31) for lubricating oil and compressed air and with an outflow orifice (22) for water which has entered and a discharge orifice (36) for the lubricating oil.

Abstract: The bearing lubricating system comprises a casing having a bore which defines a reservoir and a well sized to receive a sufficient volume of a suitable liquid lubricant. A return passage in the casing allows fluid flow from the well to the reservoir. A shaft extends through the reservoir and through the well. At least one bearing is situated in the bore between the reservoir and the well. A pumper element is mounted on the shaft for rotation therewith within the well. A pair of end seals seal off the opposite ends of the bore from the ambient.

Abstract: An automatic transmission has a rotational shaft with an axial through-hole. The shaft is supported by a case through bearings at opposite ends thereof. In the hole, a cup-type plug with holes is engaged with the shaft at one end thereof. A lubricating means is disposed in the case facing the holes for distributing a lubricating hydraulic fluid to bearings disposed at each end of the shaft.

Abstract: Apparatus to lubricate generator bearings with an oil-air mist is disclosed. A screw pump, preferably an assembly of components comprising a ring, a teflon seal, a pump rotor and a hub is secured onto a rotor shaft of a generator for rotation therewith. The rotor shaft has at least one passageway extending radially from an axial bore therein through which oil is transferred. The screw pump has a first orifice coincident with the rotor shaft passageway, a second orifice, a passageway extending from the first orifice to the second orifice through which the oil is directed into a cavity in the generator housing where it mixes with air to form a mist to lubricate the bearing, a circumferential surface fitting within an opening in the generator housing, and a helical groove in the circumferential surface through which the oil-air mist is evacuated during rotation of the generator rotor shaft.

Abstract: A system for cooling and lubricating the drive motor of a centrifuge. The shaft of the motor includes an internal passage with an inlet having a size and taper sufficient to provide the desired rate of cooling oil flow through the motor. A lower bearing proportioning arrangement applies a high percentage of a small proportion of the total oil flow to the lower bearing. An upper bearing proportioning arrangement applies a low percentage of a large proportion of the total oil flow to the upper bearing. Together these features assure a high degree of motor cooling without overlubricating the bearings.

Abstract: An adaptive control system for a machine tool or the like includes a temperature sensor for measuring spindle bearing temperature and two pairs of thrust sensors for measuring radial and axial spindle deflection. Data processing apparatus, typically comprised of a microcomputer, is coupled to the temperature and thrust sensors and regulates the percentage of oil in the oil-air mixture lubrication mist sprayed on bearing contact surfaces in accordance with bearing temperature. The microcomputer simultaneously regulates the spindle bearing preload and spindle axis feedrate in accordance with radial and axial spindle thrust, thereby assuring optimum machine tool performance.