摘要:
In an aerostatic or hydrostatic bearing a ring that is freely movable in the lubricant supply flow controls the lubricant distribution over the entry of the slit between the bearing members and amplifies the circumferential pressure differentiation occurring at eccentric positions of the bearing members. As a result the bearing''s carrying capacity and stiffness are improved.
摘要:
A compact bearing system is capable of variable load carrying capability and precision motion on a guideway. The compact bearing system includes a bearing body, a fluid medium, a sealing bearing member and a pressurizing action means. The bearing body includes an internal pocket with an open side facing a surface of said guideway. The fluid medium is contained inside said internal pocket and is contacted with said surface of said guideway on said open side. The sealing bearing member is contacted with said surface of said guideway and seals a clearance between said bearing body and said surface of said guideway to limit leakage of said fluid medium. The pressurizing actuation means pressurizes the confined fluid medium through a small passage by the principle of connected vessels, and the pressurized fluid medium carrying main portion of load carried on said compact bearing system.
摘要:
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.
摘要:
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.
摘要:
A bearing assembly for a wind turbine includes a bearing housing and a bearing surface defining a passageway configured to receive a shaft. The bearing surface includes a stationary portion and a movable portion, the movable portion being defined by a movable member coupled to the bearing housing. The movable member is movable between a first position, wherein the movable portion is flush with the stationary portion such that the bearing surface is smooth, and a second position wherein the movable portion is spaced from the stationary portion to define a fluid cavity in the bearing surface. A method of operating a plain bearing assembly includes operating the plain bearing assembly as a hydrostatic plain bearing during low dynamic conditions and operating the plain bearing assembly as a hydrodynamic plain bearing during high dynamic conditions.
摘要:
An exemplary center housing for a turbocharger includes a bore for supporting a turbocharger shaft, a lubricant feed port, a first lubricant outlet port, a second lubricant outlet port and a valve operably disposed to provide a first path from the lubricant feed port to the first lubricant outlet port and a second path from the lubricant feed port to the second lubricant outlet port wherein the valve responds to pressure generated by axial movement of the turbocharger shaft to increase resistance of the first path or the second path. Various other exemplary mechanisms are also disclosed.
摘要:
The invention pertains to a regulator for regulating a medium flow to at least one hydrostatic or aerostatic pocket of a bearing, a nut for threaded spindles or a guidance from a medium supply, with pressure chambers that are separated by a variable flow resistance control element that can be moved against the force of a spring element. A first pressure chamber is directly connected to the medium supply, a second pressure chamber that is charged with a lower pressure level is connected to the medium supply via a first flow resistance, and a third pressure chamber is charged with a third pressure level that corresponds to the pressure in the hydrostatic or aerostatic pocket.
摘要:
A damping arrangement 20 (FIG. 1(b)) for radial vibrations in a turbomachine shaft 10 comprise two circumferentially limited, diametrically opposed damping chambers 22, 23 open towards the shaft and to which gas is supplied alternately by gas flow controllers 29.sub.A and 29.sub.B. Each controller contains fluidic devices switched by sensing pressures in the circumferentially displaced chambers 22', 23', or even the same chambers, as such pressure are modulated by the variations in shaft position, to divert the gas from source 27. The diversion of gas flow is arranged to cause pressure fluctuations, which exert radial thrust on the shaft, advanced in phase to approach of the shaft so as to damp the vibration. The fluidic devices may be implemented by flow amplifiers or fluid logic flip flop 41 (FIG. 2) and may be multistage devices to increase gain, all of which may be formed without moving parts and embedded in the housing. Flow diversion may be effected by other forms of sensing, such as leakage from a nozzle facing the shaft. The arrangement may be combined with, or serve as, a gas seal or be part of a bearing arrangement.
摘要:
The invention disclosed herein relates to an inherent variable fluid restrictor for regulating fluid pressure in a hydrostatic bearing. The inherent variable fluid restrictor is comprised of a restrictor land surrounding a fluid supply port, a collection gallery around the restrictor land and containing a fluid cross-feed port, an isolation land around the collection gallery, and a bearing pocket around the isolation land. A flow channel connects the fluid cross-feed port to a diametrically opposed bearing pocket.