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:
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:
A device of the axial-directional oil chamber of hydrostatic spindle comprises integrated oil seal structures at both the axial direction and the radial direction. The oil seal structures increase the work area of the oil chamber by extending and thus connecting an axial-directional oil seal edge to a radial-directional oil seal edge. Then, the rigidity of the axial hydrostatic bearing can be increased, and thus the application capability of the hydrostatic spindle can be upgraded to perform the multi-task machining from the mono-task machining.
Abstract:
A bearing assembly system adapted for use on a rock crusher having a main frame, a main shaft, an eccentric and a crashing bead, The bearing assembly system comprises a first bearing ring which is disposed around the main shaft, a second bearing ring which is disposed adjacent to the first bearing ring, and a means for conveying fluid to at least one of the first bearing ring and the second bearing ring, in the preferred bearing assembly system at least one of the first bearing ring and the second bearing ring comprises a fluid depression, The preferred method farther comprises conveying fluid from the means for conveying fluid to at least one of the first bearing ring and second bearing ring.
Abstract:
A slide bearing for supporting a shaft and comprising at least one bearing shell for receiving the shaft. The bearing shell and the surface of the shaft define a bearing gap. Also described is a mechanism for supplying a lubricant to the bearing gap so that the lubricant can be removed therefrom. To compensate for negative effects of a temperature-dependent change of the bearing gap, there is provided at least one throttling element for throttling the flow of lubricant through the bearing gap.
Abstract:
A pod propulsion system comprises a housing defining a fluid duct and an annular drum rotatably mounted to the housing within the fluid duct. The annular drum has a drum interior and a cylindrical outer surface. The system further comprises a rotor mounted to the drum for rotation therewith, the rotor and the drum having a common axis of rotation. A bearing assembly mounted to the housing comprises a first bearing comprising a first plurality of bearing pads disposed circumferentially around the drum. Each pad has a pad bearing surface adapted to contact a first drum portion in a predetermined manner and is pivotably mounted to the housing so as to maintain contact of the pad bearing surface with the first drum portion in the predetermined manner when an orientation of the drum portion relative to the housing changes.
Abstract:
A hydraulic bearing that supports a rotating shaft comprises a bearing metal. On a surface of the bearing metal, a hydrostatic pocket and a land portion are formed. The land portion is defined by the hydrostatic pocket and generates hydrodynamic pressure in response to a rotation of the rotating shaft. The hydraulic bearing further comprises a pressure fluid supplying source and an oil-supplying hole. The oil-supplying hole is opened in the hydrostatic pocket and provides pressure fluid from the pressure fluid supplying source to the hydrostatic pocket. On the land portion, a drain hole that drains the fluid is formed. On the way of a drain passage, a check valve is disposed. Since the drain hole does not separate the land portion, deterioration of bearing rigidity is restrained. Further, since the fluid is drained through the drain hole, thermal expansion of the bearing metal due to heat generation of the fluid is restrained. Moreover, according to the check valve, it is possible to prevent suctioning air into the hydraulic bearing when negative pressure generates at the land portion.
Abstract:
A multi-pad, fluid film thrust bearing has the pads suspended from the carrier ring on hydrostatic oil pressure regions. The oil is pressurized hydrodynamically by relative rotation between a load surface and the bearing surface of each pad; and the oil is passed through each pad to a rear cavity where the hydrostatic pressure region is established. A manifold interconnects all of the hydrostatic pressure regions for the individual pads in order to average the hydrostatic pressures and provide for static and dynamic load equalization.
Abstract:
A bearing structure which incorporates the advantages of a hydrodynamic film and of a hydrostatic squeeze film. The structure uses an inner elongated cylindrical bearing member with a hydrodynamic bearing therein, and an outer bearing member axially encompasses the inner bearing member. Passageways and adjacent surface on such members establish fluid flow paths, hydrostatic pockets and squeeze film areas to support such inner bearing member.
Abstract:
In a body supporting another body via a land into which sealing gas is supplied via an in-coming gas groove or grooves for liquid sealing purpose and from which fluid is discharged through a fluid groove, one or more sets of out-going gas grooves are formed opening to the land in between the in-coming gas groove(s) and the fluid groove so that both undesirable mixing of the sealing gas with the fluid and accidental invasion of outside dust or the like into the arrangement is effectively prevented.