Fluid bearing
AssigneeToyoda Koki Kabushiki Kaisha
InventorsHiroshi Suzuki, Kunio Shibata, Kazuhiko Sugita
Life of this patent
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Abstract
A fluid bearing for rotatably supporting a rotary shaft. A plurality of pressure generating zones are defined on a bearing surface of a bearing member in a circumferential direction. Each of the pressure generating zones comprises a pair of axially spaced fluid pockets, at least one raised land formed in at least one of the pair of fluid pockets, a passage member for fluidically communicating the pair of fluid pockets with each other, a throttle member connected to the fluid pockets for admitting pressurized fluid therein and an exhaust port formed on the raised land for discharging pressurized fluid. An exhaust member is formed on the bearing surface outside the pressure generating zones for discharging pressurized fluid.
Claims14
A fluid bearing for rotatably supporting a rotary shaft comprising:
- a stationary housing;
- a bearing member fixedly inserted in said stationary housing and having an internal bore which forms a bearing surface;
- a plurality of pressure generating zones defined on said bearing surface in a circumferential direction;
- a pair of axially spaced fluid pockets in each of said pressure generating zones;
- a land portion defined on said bearing surface between said pair of axially spaced fluid pockets in each of said pressure generating zones;
- at least one raised land formed in at least one of said pair of fluid pockets;
- an axial passage for fluidically communicating said pair of fluid pockets with each other;
- throttle means connected to said fluid pockets for admitting pressurized fluid in the same;
- an exhaust port formed on said at least one raised land and communicating with atmosphere for discharging pressurized fluid;
- and
- exhaust means formed on said bearing surface outside said pressure generating zones and communicating with the atmosphere for discharging pressurized fluid.
A fluid bearing for rotatably supporting a rotary shaft comprising:
- a stationary housing;
- a bearing member fixedly inserted in said stationary housing and having an internal bore which forms a bearing surface;
- a plurality of pressure generating zones defined on said bearing surface in a circumferential direction;
- a pair of axially spaced fluid pockets in each of said pressure generating zones;
- a land portion defined on said bearing surface between said pair of axially spaced fluid pockets in each of said pressure generating zones;
- at least one raised land formed in at least one of said pair of fluid pockets;
- an axial passage for fluidically communicating said pair of fluid pockets with each other;
- throttle means connected to said fluid pockets for admitting pressurized fluid in the same;
- an exhaust port formed on said at least one raised land and communicating with atmosphere for discharging pressurized fluid;
- exhaust means formed on said bearing surface outside said pressure generating zones and communicating with the atmosphere for discharging pressurized fluid;
- passage means for communicating said exhaust ports formed on said raised lands, said passage means communicating with atmosphere;
- and
- wherein said exhaust means comprises a pair of annular exhaust grooves formed on said bearing surface outside said pressure generating zones, one of said pair of annular exhaust grooves near the axially inner end of said bearing member communicating with the atmosphere at the uppermost position in the gravitational direction.
Dependencies are inferred from the claim text.