Hydrodynamic bearing and method for manufacturing the same
AssigneeFoxconn Technology Co., Ltd.
InventorChuen-Shu Hou
Life of this patent
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Abstract
A hydrodynamic bearing (300) has a bearing surface adapted for receiving a shaft to rotate thereon. The bearing surface has a plurality of grooves (34) defined therein. The grooves are used for generating hydrodynamic pressure. A depth of each of the grooves is changed in a sloping trend along the extension direction of the groove.
Claims20
A hydrodynamic bearing having a bearing surface adapted for receiving a shaft to rotate thereon, the bearing surface having a plurality of grooves defined therein, the grooves being for generating hydrodynamic pressure, a depth of each of the grooves changed in a sloping trend along an extension direction of each of the grooves.
A method for manufacturing a hydrodynamic bearing with hydrodynamic pressure generating grooves comprising:
- providing a substrate with a plurality of protrusions formed on a periphery thereof, a thickness of each of the protrusions varying in a sloping trend along an extension direction thereof;
- placing the substrate in a middle of a hollow mold, then injecting a feedstock of powder and molten binder into the mold to surround the substrate under pressure, thus forming a desired bearing preform;
- separating the substrate from the bearing preform by means of catalytic debinding;
- separating the molten binder from the bearing preform;
- and
- sintering the bearing preform to thereby form the hydrodynamic bearing.
A bearing surface adapted for receiving an element to rotate thereon, comprising a plurality of grooves therein, each of the grooves having at least two branches connecting with each other at a point, each of the branches having a groove depth which is varied along an extension direction of each of the branches from an end of each of the branches to the connecting point.
Dependencies are inferred from the claim text.