Fluid-dynamic bearing e.g. fluid-dynamic radial bearing, for rotary support of spindle motor, has groove provided on storage space, and producing pump effect on fluid, which is adjusted opposite to pump effect

摘要

The bearing has two bearing components movable relative to each other, and forming bearing surfaces (12) opposite to each other. A thin bearing space filled with a bearing fluid is formed between the surfaces. The bearing fluid is conveyed in a defined conveying direction. A groove (22) e.g. straight groove, is provided on a storage space (10), and produces a pump effect on the bearing fluid, which is adjusted opposite to the pump effect produced pre-dominantly by a bearing groove structure (14). The additional groove exhibits a larger depth than the bearing groove structure.