Hydraulic bearing device
First Claim
1. A hydraulic bearing device that supports a rotating shaft comprising:
- a bearing metal;
a hydrostatic pocket formed on a surface of the bearing metal;
a land portion formed on the surface of the bearing metal and defined by the hydrostatic pocket, which generates hydrodynamic pressure;
a pressure fluid supplying source;
an oil-supplying hole opened in the hydrostatic pocket and providing pressure fluid from the pressure fluid supplying source to the hydrostatic pocket; and
a drain hole formed on the land portion and draining the fluid.
1 Assignment
0 Petitions
Accused Products
Abstract
A hydraulic bearing device 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. The hydraulic bearing device 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. 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, since the drain hole does not separate the land portion, deterioration of bearing rigidity is restrained.
38 Citations
16 Claims
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1. A hydraulic bearing device that supports a rotating shaft comprising:
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a bearing metal;
a hydrostatic pocket formed on a surface of the bearing metal;
a land portion formed on the surface of the bearing metal and defined by the hydrostatic pocket, which generates hydrodynamic pressure;
a pressure fluid supplying source;
an oil-supplying hole opened in the hydrostatic pocket and providing pressure fluid from the pressure fluid supplying source to the hydrostatic pocket; and
a drain hole formed on the land portion and draining the fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A radial hydraulic bearing device that supports an outer surface of a rotating shaft comprising:
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a cylindrical bearing metal;
a plural number of hydrostatic pockets formed on an inner circumferential surface of the bearing metal;
a land portion formed on the inner circumferential surface of the bearing metal and defined by the hydrostatic pockets, which generates hydrodynamic pressure;
a pressure fluid supplying source;
an oil-supplying hole opened in each of the hydrostatic pockets and providing pressure fluid from the pressure fluid supplying source to each of the hydrostatic pockets;
a drain hole formed on each land portion between each of the hydrostatic pockets and draining the fluid; and
a variable valve connecting with the drain hole.
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16. A thrust hydraulic bearing device that supports a surface perpendicular to rotational axis of a rotating shaft comprising:
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a ring-shaped bearing metal;
a plural number of hydrostatic pockets formed on an end surface of the bearing metal;
a land portion formed on the end surface of the bearing metal and defined by each of the hydrostatic pockets, which generates hydrodynamic pressure;
a pressure fluid supplying source;
an oil-supplying hole opened in each of the hydrostatic pockets and providing pressure fluid from the pressure fluid supplying source to each of the hydrostatic pockets;
a drain hole formed on the land portion between each of the hydrostatic pockets and draining the fluid; and
a variable valve connecting with the drain hole.
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Specification