Abstract:
The arrangement comprises a fluid bearing comprising a first fluid bearing element located in a bearing housing and a piston located in a pump housing. The bearing housing comprises a bearing housing opening. The pump housing comprises a pump housing opening. The first fluid bearing element is connected to the piston by means of a connection means extending from the first fluid bearing element through the bearing housing opening to the piston through the pump housing opening. The piston is arranged to reciprocate in the pump housing. The pump housing is connected to a fluid reservoir by means of a first inlet. The bearing housing comprises a first outlet for allowing fluid to exit the bearing housing. The arrangement further comprises a fluid transport means fluidly connecting the pump housing and the bearing housing.
Abstract:
A rolling-element bearing includes an inner bearing ring and an outer bearing ring. The inner bearing ring and the outer bearing ring define an axial direction and a circumferential direction. The rolling-element bearing includes a plurality of rolling elements. The rolling elements are configured to roll circumferentially between the inner bearing ring and the outer bearing ring. The rolling-element bearing includes at least one oil chamber. The oil chamber is between the inner bearing ring and the outer bearing ring. Each oil chamber is defined by the inner bearing ring, the outer bearing ring and an oil chamber housing. The oil chamber housing is fixed to one of the inner bearing ring and the outer bearing ring. The rolling-element bearing includes at least one duct corresponding to each oil chamber. The at least one duct is for a supply of oil to the corresponding oil chamber. Each duct extends through the bearing ring to which the oil chamber housing is fixed.
Abstract:
An object is to provide a tilting-pad bearing device whereby it is possible to levitate a rotation shaft with a low supply-oil pressure. A tilting-pad bearing device includes a plurality of bearing pads disposed around a rotation shaft so as to support the rotation shaft rotatably, a support member interposed between the plurality of bearing pads and a bearing housing supporting the plurality of bearing pads, the support member supporting each of the plurality of bearing pads pivotably, and an oil-supply mechanism configured to supply a lubricant oil to at least one oil groove formed on a bearing surface of at least one of the plurality of bearing pads. The at least one oil groove is disposed inside and outside a contact area of the bearing surface which is in contact with an outer circumferential surface of the rotation shaft when the rotation shaft is stopped.
Abstract:
There are provided a duplex bearing device that can reduce the temperature of lubricating oil supplied from a journal bearing to a thrust bearing and thereby can reduce the total amount of oil supplied, and a rotating machine equipped with this. A duplex bearing device 1 is equipped with a tilting pad journal bearing 2 that accepts a radial load of a rotating shaft 4, and a thrust bearing 3 that is provided on an axial end of the journal bearing 2 and accepts an axial load of the rotating shaft 4 via a thrust collar 10 provided on the outer peripheral side of the rotating shaft 4, and has a journal bearing oil supply path 17 that supplies the lubricating oil from the outside into between journal pads 5 of the journal bearing 1, a thrust bearing oil supply path 20 that supplies the lubricating oil from the outside to the thrust bearing 3, and a re-used oil supply path 23 that supplies the lubricating oil to the thrust bearing 3 only from between the journal pads 5 of the journal bearing 2.
Abstract:
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.
Abstract:
A compact surface self-compensated hydrostatic bearing includes a rotor assembly including a rotor plate having upper and lower fluid restricting faces, a rotor top and bottom, each having bearing surfaces angled with respect to an axis of rotation of the rotor assembly; a stator assembly including a stator top and a stator bottom housing the rotor assembly therebetween, the stator top and bottom having bearing surfaces facing and spaced apart from the rotor top and bottom bearing surfaces forming upper and lower bearing gaps, respectively, therebetween; the stator top and bottom including a lower and an upper fluid restricting surface, respectively, facing and spaced apart from the rotor upper and rotor lower fluid restricting faces, respectively, forming upper and lower restricting gaps, respectively, therebetween; and a fluid supply system configured to supply pressurized fluid to the bearing gaps and into the upper and lower fluid restricting gaps.
Abstract:
A rotating hub and fixed spindle assembly with first and second fluid dynamic journal bearings and first and second fluid dynamic thrust bearings for a disc drive memory system has a pump seal and a radial ring seal at a first axial terminus for lubricant containment, and a capillary seal and a labyrinth seal at a second axial terminus for lubricant containment and storage. Lubricant fluid pressure differences between first and second seals are minimized through one or more lubricant fluid communicating channels in the hub assembly, in order to minimize lubricant fluid loss through a seal. Lubricant fluid can also be purged of any air bubbles by lubricant fluid circulation through the channel.
Abstract:
A method and device are provided for stabilizing shaft bearings in a motor having a hollow shaft and holes communicating the shaft and the bearings. A lubricant pump is provided for pressurizing a volume of lubricant located within the motor housing, the pump having a set of impellers attached to a lower end of the shaft and rotating with the shaft, the impellers being located in the flow path of the lubricant. A diffuser is located upstream of and adjacent each impeller. The impellers increase the radial velocity of the lubricant, and this velocity is converted into a pressure head at the impeller outlet. The lubricant flows through the first diffuser, through the first impeller, through the second diffuser, and then flows through the second impeller and out into a reservoir. The pressure causes the lubricant to flow through the hollow shaft and through passages to stabilize the bearings.
Abstract:
A CT scanner (10) for obtaining a medical diagnostic image of a subject includes a stationary gantry (12), and a rotating gantry (16) rotatably supported on the stationary gantry (12) for rotation about the subject. A fluid bearing (18) is interposed between the stationary and rotating gantries (12) and (16), respectively. The fluid bearing (18) provides a fluid barrier (110) which separates the rotating gantry (16) from the stationary gantry (12). In a preferred embodiment, the fluid bearing (18) provides for quieter CT scanner operation at high rotational speeds. Moreover, eliminating the physical contact between the gantries minimizes wear and optimizes longevity.
Abstract:
A compressor (30) for use in a refrigerator, which has a rotary shaft (33) supported by bearings (39 to 42) to be lubricated by a liquid refrigerant and is adapted to permit the rotary shaft 33 to continue rotating for a while after a liquid refrigerant pump (36) is stopped at, for example, a power failure, thereby preventing the bearings (39 to 42) from being damaged. To that end, the compressor (30) is further provided with a header (52) for storing a predetermined amount of a high-pressure liquid refrigerant, and with check valves (51, 54 and 56) for maintaining the internal pressure of this header (52) at a high pressure for a predetermined time period after a power failure occurs.