Entries |
Document | Title | Date |
20080267544 | Fluid dynamic bearing system - The invention relates to a fluid dynamic bearing system that has a first bearing part and a second bearing part that is rotatable with respect to the first bearing part, both of which form a bearing gap filled with a bearing fluid between opposing bearing surfaces. The bearing gap has two open ends that are each sealed against the environment by means of sealing zones. Bearing patterns used to generate hydrodynamic pressure within the bearing gap are provided on at least two spatially separated bearing surfaces. According to the invention, the bearing system is designed as a segment step bearing suited for changed directions of rotation, the ends of the sealing zones open to the environment being disposed on a smaller radial diameter than the bearing gap. The bearing fluid is thus kept in the bearing gap by means of a centrifugal force since on rotation of the bearing, the bearing fluid is pressed towards the outside and not towards the openings in the bearing gap or the sealing zones respectively. | 10-30-2008 |
20090022439 | FLUID DYNAMIC BEARING DEVICE - A fluid dynamic bearing device having high bearing performance at low cost is provided. | 01-22-2009 |
20090028475 | FAN WITH AN ANTI-LEAKAGE DEVICE FOR AN OILY BEARING - A fan with an anti-leakage device for an oily bearing includes a base, an axial barrel, a fan wheel and a bearing. The axial barrel extends from the base and provides a first end, a second end, a first oil storage groove at the second end. The fan wheel extends a spindle from the inner side thereof and provides a joining part surrounding an end of the spindle and being adjacent to the inner side of the first end. The bearing is received in the axial barrel and further includes an axial through bore, which provides two inverted cone shaped ends, and at least a second oil storage groove, which is provided at a wall surface of the axial through bore for being adjacent to the spindle closely. Thus, a closed circuit is formed for the lubrication oil flowing back to the bearing without leakage. | 01-29-2009 |
20090028476 | ANTI-LEAKAGE DEVICE IN A FAN FOR AN OILY BEARING - A fan with an anti-leakage device for an oily bearing includes a base, an axial barrel, a fan wheel and a bearing. The axial barrel extends from the base and provides a first end, a second end, a first oil storage groove at the second end. The fan wheel extends a spindle from the inner side thereof and provides a joining part surrounding an end of the spindle to be adjacent to the inner side of the first end. The bearing is received in the axial barrel and further includes an axial bore, which provides two cone shaped ends, and at least a second oil storage groove, which is provided at a wall surface thereof for being adjacent to the spindle closely; and a reduced-curve end, which is opposite to the joining part. Thus, a closed circuit is formed for the lubrication oil flowing back to the bearing without leakage. | 01-29-2009 |
20090196541 | FLOW BEARING FOR HIGH PRESSURE APPLICATIONS - A flow bearing includes a first tubular body and a second tubular body. The first tubular body has a first outer surface and a first inner surface defining a first bore. A first bearing surface is positioned on the first inner surface. The second tubular body has a second outer surface and a second inner surface defining a second bore. A second bearing surface is positioned on the second inner surface. The second tubular body is concentrically disposed within the first bore of the first tubular body, with the first inner surface facing the second outer surface. The first bearing surface and the second bearing surface are engaged in close fitting relation and define a mud lubricated flow gap. A metering valve is positioned one of upstream or downstream of the flow gap to meter flow through the flow gap. | 08-06-2009 |
20090232430 | FLUID DYNAMIC BEARING DEVICE AND METHOD OF MANUFACTURING THE SAME - In this type of fluid dynamic bearing device, there is formed a resin member capable of suppressing the intrusion of a lubricating oil as much as possible even when carbon fibers are compounded. | 09-17-2009 |
20100002967 | HYDRODYNAMIC RADIAL PLAIN BEARING WITH A VERY HIGH LOAD-BEARING CAPACITY OF LARGE TURBINE SETS - A plain bearing with a bearing body in which a body, which is to be stored is arranged, is disclosed. The bearing body is surrounded by a supporting body. The bearing capacity is improved by virtue of the fact that the bearing body has a partial joint arranged at an angle in relation to the horizontal. The plain bearing has an active cooling system and an articulated lubrication system. | 01-07-2010 |
20100034493 | Fluid bearing device - Provided is a fluid bearing device in which run-out of another member fixed to a shaft member is suppressed. At one end of a shaft member ( | 02-11-2010 |
20100034494 | FLUID DYNAMIC BEARING DEVICE - Peeling-off of an oil-repellent film can be reliably prevented. A fluid dynamic bearing device ( | 02-11-2010 |
20100166347 | COOLED THIN-SHELL BEARING BUSHING - Cooling system for a hydrodynamic bearing bushing of annular appearance positioned in a support body, equipped with means of distributing cold oil under pressure to a shaft rotating in the bearing bushing, wherein it consists of a thin annular shell, the external surface of which is closely fitted into the bore of said support body, grooves being made in that part of said bore that corresponds to the angular region of the bearing bushing on which the load is applied during operation, said grooves being supplied with cold oil tapped downstream from the distribution means. | 07-01-2010 |
20100177998 | FLUID BEARING DEVICE - An object is to reduce manufacturing cost of a housing, and enable to disuse an adhesive in fixation portions between a housing and a bearing sleeve and the like. | 07-15-2010 |
20100195943 | FLUID BEARING STRUCTURE AND METHOD OF FORMING BEARING CONCAVES IN FLUID BEARING STRUCTURE - A fluid bearing structure with uniform depths of bearing concaves and a method of forming the bearing concaves in the fluid bearing structure. Pipe parts are inserted into through holes formed in the bearing base to form fluid spout holes for spouting fluid between confronting bearing surfaces. Bearing concaves are formed around the fluid spout holes. The bearing base and the pipe parts are made of different materials. A coating layer is formed on the bearing base and the pipe parts by an anodic oxidation process. Thickness of the coating layer on the bearing base is different from thickness of the coating layer on the pipe parts since the base member and the pipe members are made of different materials. The material on which a coating layer grows quickly is selected for the bearing base and the material on which a coating layer grows slowly is selected for the pipe parts. | 08-05-2010 |
20100247010 | AIRFOIL-MAGNETIC HYBRID BEARING AND A CONTROL SYSTEM THEREOF - The present invention relates to an airfoil-magnetic hybrid bearing, which is a combination of a magnetic bearing and airfoil bearing. An airfoil-magnetic hybrid bearing of the present invention comprises: a housing around a rotating shaft of a rotation device; an airfoil bearing positioned between the housing and the rotating shaft for forming dynamic pressure to levitate the rotating shaft during rotation of the rotating shaft; a magnetic bearing including a plurality of cores positioned radially between inner surface of the housing and outer surface of the airfoil bearing, the cores being projected to the center of the rotating shaft, and coils wound to the cores to levitate the rotating shaft using a magnetic attractive force generated by a current application thereto; and a coupling segment for coupling the airfoil bearing to the magnetic bearing directly. | 09-30-2010 |
20100266225 | SHAFT MEMBER FOR FLUID LUBRICATION BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs. | 10-21-2010 |
20100278465 | Compliant spherical bearing mount - A gas turbine engine bearing assembly for a portion of a shaft that rotates around an axis, including a substantially cylindrical bearing having a length extending between a first end and a second end along the axis of the rotating shaft. A plurality of segmented damper springs are positioned around an exterior perimeter of a portion of the cylindrical bearing. Each spring has a width along the axis of the rotating shaft and a portion of each spring defines an outer spherically contoured joint. The width of each spring is less than the length of the bearing. | 11-04-2010 |
20100310199 | SINTERED BEARING - A maximum diameter (d) of each of surface openings formed in a bearing surface through melting of Sn metal powder as a binder is set within a range of 0 μm12-09-2010 | |
20110019948 | FLUID DYNAMIC BEARING DEVICE, AND MANUFACTURING METHOD OF BEARING MEMBER - A molding pin ( | 01-27-2011 |
20110064341 | DISK DRIVE DEVICE CAPABLE OF BEING IMPROVED IN ANTI-VIBRATION CHARACTERISTIC - A disk drive device includes: a hub on which a recording disk is to be mounted; a shaft; a sleeve configured to house the shaft and to be rotatable relatively with respect to the shaft; a radial space portion formed between the inner circumferential surface of the sleeve and the outer circumferential surface of the shaft; a radial dynamic pressure generating portion configured to generate radial dynamic pressure between at least part of the inner circumferential surface of the sleeve and the outer circumferential surface of the shaft in the radial space portion; and lubricant. The axial length of the radial dynamic pressure generating portion is formed to be longer than the diameter of the radial dynamic pressure generating portion such that radial dynamic pressure, which is defined with the axial length of the radial dynamic pressure generating portion and the diameter thereof being parameters, is greater than or equal to a predetermined minimum reference value. | 03-17-2011 |
20110170813 | FLUID DYNAMIC BEARING DEVICE AND MANUFACTURING METHOD THEREFOR - To increase fixation strength of a bearing sleeve with respect to a bottomed cylindrical housing, a fluid dynamic bearing device ( | 07-14-2011 |
20120020597 | Active hydrostatic bearing, particularly for internal combustion reciprocating engines, a fluid handling system associted therewith, and method - This invention relates to bearings, and more specifically is directed to active hydrostatic bearings destined for large heavily loaded reciprocating internal combustion engines, like ultra high compression ratio Diesel cycle engines, and homogeneous charge compression ignition (HCCI) and detonation engines working on stoichiometric fuel/air mixture. A fluid handling system therefore, method and apparatus are also disclosed. | 01-26-2012 |
20120027327 | JOURNAL AIR BEARING - An example journal air bearing for a rotatable shaft of an air cycle machine includes a top foil configured to receive a rotatable shaft, and an intermediate foil radially outboard the top foil. A journal sleeve is radially outboard the intermediate foil. The top foil and the intermediate foil establish apertures configured to communicate fluid between a first position radially inboard the top foil and a second position radially outboard the intermediate foil. | 02-02-2012 |
20120057813 | FLUID BEARING TO SUPPORT STENT TUBING DURING LASER CUTTING - A fluid bearing assembly provides support to stent tubing while the stent tubing is undergoing laser cutting to form a stent pattern. The fluid bearing assembly supports the stent tubing and provides a fluid barrier between the bearing and the stent tubing thereby providing nearly frictionless movement between the support bearing and the stent tubing. | 03-08-2012 |
20120170880 | FLUID DYNAMIC BEARING DEVICE - A density of a bearing sleeve made of a sintered metal is set within a range of from 80% to 95% with respect to a true density, and a Young's modulus of the bearing sleeve is set to be equal to or more than 70 GPa. When the density of the bearing sleeve is increased and also the Young's modulus thereof is set to be equal to or more than 70 GPa in this manner, dimensional variation of an inner peripheral surface of the bearing sleeve can be suppressed to be equal to or less than 0.5 μm when a shaft member having an outer diameter of from 2 mm to 4 mm is to be supported. | 07-05-2012 |
20120183244 | Hydrodynamic radial plain bearing with a very high load-bearing capacity of large turbine sets - A plain bearing includes a bearing body in which a body, which is to be stored, is arranged. The bearing body is surrounded by a supporting body. The bearing body has a partial joint arranged at an angle in relation to the horizontal. The plain bearing has an active cooling system and an articulated lubrication system. | 07-19-2012 |
20120237148 | FLUID DYNAMIC BEARING DEVICE - A fluid dynamic bearing device which exhibits high bearing performance at low cost has a highly accurate bearing gap. At least a region in the outer circumferential surface of a shaft, which faces the radial bearing gap, is constituted of an electroformed part, and the region of the shaft excluding the electroformed part is constituted of a resin portion. | 09-20-2012 |
20120243813 | FLUID DYNAMIC BEARING DEVICE - Provided is a fluid dynamic bearing device which has excellent moment rigidity and an improved working efficiency in assembling and parts control, and in which a bearing sleeve can be easily manufactured. A plurality of bearing sleeves are axially disposed in the fluid dynamic bearing device. The bearing sleeves ( | 09-27-2012 |
20120288224 | CENTERING MECHANISMS FOR TURBOCHARGER BEARINGS - An turbocharger assembly can include a compressor side ring disposed at least partially in a compressor side annular notch of a bearing, the ring in contact with a bore wall of a housing and the bearing to hinder axial flow of lubricant to a compressor end of the bearing and to reduce variation in a lubricant squeeze film thickness defined by and between the bearing and the bore wall and a turbine side ring disposed at least partially in a turbine side annular notch, the ring in contact with the bore wall and the bearing to hinder axial flow of lubricant to the turbine end of the bearing and to reduce variation in the lubricant squeeze film thickness. Various other springs, bearings, housings, assemblies, etc., are also disclosed. | 11-15-2012 |
20130044970 | HYDRODYNAMIC BEARING ASSEMBLY - A hydrodynamic bearing assembly includes a shaft; a sleeve having a shaft hole formed therein so that the shaft is rotatably inserted thereinto; and first and second dynamic pressure generation grooves provided in at least one of an outer surface of the shaft and an inner surface of the sleeve and having a herringbone pattern including V-shaped portions in which upper and lower wings are provided to generate dynamic pressure in lubricating fluid filling a bearing clearance between the shaft and the sleeve at the time of rotation of the shaft. The first dynamic pressure generation groove has a V-shaped portion of which an upper wing is longer than a lower wing, and the second dynamic pressure generation groove is disposed below the first dynamic pressure generation groove in an axial direction and has a V-shaped portion of which a lower wing is longer than an upper wing. | 02-21-2013 |
20130064485 | Apparatus for fluid recirculation - A system, method and means is provided for withstanding mechanical shock for use with fluid dynamic bearings. A sealing system is provided that withstands 1000 G shock events. In an aspect, a grooved pumping seal employed between a thrust plate and a shield, a thrust plate having spiral grooves, a fluid recirculation passageway, and a reservoir creates an asymmetric pressure gradient. In an aspect, fluid is retained and air is purged utilizing an enlarged fluid reservoir, axial channels and an angled fill hole. In an aspect, a shaft is attached to a top cover supplying radial stiffness, and an enlarged single-sided thrust plate improves dynamic parallelism. | 03-14-2013 |
20130272634 | FLUID DYNAMIC BEARING DEVICE - A fluid dynamic bearing device ( | 10-17-2013 |
20130336605 | JOURNAL BEARING PAD FOR TURBINE - A hydrodynamic journal pad bearing is provided having several pads circumferentially distributed around the rotor of a large steam turbine with each pad mounted onto a platform separating the pad from a cylindrical cage in turn connected to the floor of a hall housing the turbine and having an interface between at least one of the several pads and the platform on which the at least one of the several pads is mounted is formed such as to include at least two areas with different curvatures to increase the stiffness of the interface in the event of a relative movement between the pad and the platform. | 12-19-2013 |
20140029878 | PARTIAL ARC HYDROSTATIC BEARING - A hydrostatic bearing is provided that includes a plurality of bearing pads that form loading carrying areas. A plurality of compensators are coupled to the bearing pads, each compensator includes a recessed region forming a partial arc that partially surrounds an inlet hole, the bearing pads and compensators form self-compensating features positioned on the same side of a shaft that is conducive to hydrodynamic operations | 01-30-2014 |
20140093197 | FLUID DYNAMIC BEARING SYSTEM - The fluid dynamic bearing system has at, least one stationary part, and at least one rotating part that is supported rotatable about a rotational axis with respect to the stationary part. A bearing gap filled with bearing fluid is formed between mutually opposing surfaces of the stationary and of the rotating part. The bearing system includes at least one fluid dynamic radial bearing and at least one fluid dynamic axial bearing that are disposed along sections of the bearing gap. In one aspect of the invention, an annular sealing gap for sealing open ends of the bearing gap has one end connected to the bearing gap and one end connected to an annular reservoir, the outside radius of the reservoir measured from the rotational axis being larger than the outside radius of the sealing gap. | 04-03-2014 |
20140119681 | SLIDE BEARING - A slide bearing including a rotating friction partner, a counterpart and a lubrication film between the friction partner and the counterpart, wherein the friction partner or the counterpart is coated with a hard material. | 05-01-2014 |
20140126846 | FLUID DYNAMIC BEARING DEVICE - A shaft side sealing surface ( | 05-08-2014 |
20140147066 | BEARING ARRANGEMENT FOR A SHAFT OF A TURBINE WHEEL - The invention relates to a bearing arrangement for a shaft ( | 05-29-2014 |
20140212080 | COMPONENT FOR USE IN A BEARING DEVICE AND A METHOD FOR FORMING A LUBRICANT LAYER - A component for use in a bearing device according to one embodiment of the present invention includes a lubricant layer on a surface of the component. Here, the lubricant layer contains a rod-like ionic liquid crystal compound having a cation group and an anion group. | 07-31-2014 |
20140248007 | OIL FILM BEARING - An oil film bearing for supporting a roll neck in a rolling mill, suitable in particular for transmitting high bearing forces when the bearing partners are slightly and slowly moved with respect to each other, has a bearing surface into which are incorporated rods made of a friction-reducing material (e.g., low friction compounds), which extend in a substantially perpendicular direction to the bearing surface. The rods are deformed during heat processing to define a bearing surface. The bearing partner, such as a roll sleeve, rests on the free face of the deformed rods. | 09-04-2014 |
20150043844 | SINTERED METAL BEARING - Provided is a sintered metal bearing, which is formed of raw material powder containing copper-based powder and iron-based powder as main components, the sintered metal bearing including a radial bearing surface along an inner periphery thereof. The copper-based powder includes fine copper powder exhibiting a particle size distribution in which a ratio of particles with a diameter of less than 45 μm is 80 wt % or more, the fine copper powder occupying one-third or more of a whole of the copper-based powder in terms of a weight ratio. A compressed body formed by compressing the raw material powder is sintered at 900° C. or more to 1,000° C. or less. | 02-12-2015 |
20150063731 | SINGLE AXIS ROTATIONAL GAS BEARING WITH FEED-THROUGH - A rotational gas bearing allows rotation about a single axis while supplying a pressurized gas through the bearing. The gas bearing includes a gas supply member and a gas sink member. A cylindrical depression is located in one of the gas supply member and the gas sink member. A cylindrical protrusion protrudes from the other of the gas supply member and the gas sink member and is sized to fit within a cylindrical depression with a predetermined clearance. The gas supply bearing surface is opposed to the gas sink bearing surface. An opening is located in the gas supply bearing surface. A porous coating covers a portion of the gas supply bearing surface surrounding the opening. The porous coating communicates with the pressurized gas supply via the gas supply member for maintaining a bearing pressure between the porous coating and the gas sink bearing surface, such that the bearing pressure is greater than the feed pressure. An annular channel located in the gas sink bearing surface is aligned with and located opposite the opening, and communicates with the gas sink via the gas sink member. | 03-05-2015 |
20150078688 | BEARING ARRANGEMENT FOR ROLLING MILL ROLL SHAFT - A bearing arrangement comprises first and second axially spaced oil film bearings rotatably supporting a rolling mill roll shaft. An annular pressure plate is carried by and fixed relative to the roll shaft for rotation therewith. Third and fourth oil film bearings act on opposite sides of the pressure plate to axially fix the roll shaft. | 03-19-2015 |
20150139573 | GAS-DYNAMIC AIR BEARING - A gas-dynamic air bearing for radially mounting a shaft may include a plurality of bearing segments arranged in a recess of a housing. The bearing segments may radially enclose the shaft. Each bearing segment may be held with play on the housing via a respective bolt arranged radially to a predetermined bearing axis. Each bearing segment may include an associated stop spring device supported between the housing and the bearing segments. The respective stop spring device may be resilient to stroke movements of the bearing segment effective radially outwardly relative to the bearing axis. The respective bolts may be adjustably screwed to the housing. The bolts may have an end on a segment side that delimits a spring travel of the stop spring device radially inwardly towards the bearing axis and may position the respective bearing segment. | 05-21-2015 |
20150345556 | FLUID BEARINGS - The present invention provides improvements to a fluid bearing ( | 12-03-2015 |
20160032968 | SLIDE BEARING DEVICE - A slide bearing device, includes an inner ring-shaped internal element, an intermediate element encloses the internal element in the radial direction of the slide bearing device and is at least approximately ring-shaped, and a ring-shaped external element that encloses the intermediate element in the radial direction. The internal element is rotatable relative to the external element, and the intermediate element rotatable relative to the internal element and relative to the external element. In a default state of the slide bearing device, the internal element is arranged at a distance to the intermediate element in the radial direction of the slide bearing device, and the intermediate element is arranged at a distance to the external element. The internal element and the external element are made of a metallic material and the intermediate element with a non-metallic material. | 02-04-2016 |
20160160917 | HYDRODYNAMIC BEARING FEATURES - A system includes a hydraulic transfer system configured to exchange pressures between a first fluid and a second fluid, where the first fluid has a pressure higher than the second fluid, includes a sleeve comprising an elliptical shape, a cylindrical rotor disposed within the sleeve in a concentric arrangement, where the cylindrical rotor is configured to rotate circumferentially about a rotational axis and has a first end face and a second end face disposed opposite each other. The system includes a first and second end cover having a first and second surface which interface with a first and second end face of the rotor. The system includes a first and a second radial clearance disposed between the sleeve and the cylindrical rotor, where the radial clearances are configured to increase or decrease based at least in part on a pressure differential. | 06-09-2016 |
20160195133 | OIL FILM BEARING | 07-07-2016 |