Sealing arrangement for fluid storage of spindle motor, has shaft, bearing sleeve and pressure disk spaced apart from one another by storage gap, where open end of storage gap is sealed by conical capillary seal and pumping seal

摘要

The arrangement has a shaft (10), a bearing sleeve (12) and a pressure disk (14) spaced apart from one another by a storage gap (16), which is filled with storage fluid. The shaft and the disk rotate relative to a rotational axis (30). The storage gap comprises an open end sealed by a conical capillary seal and a pumping seal, where the capillary seal is arranged between the storage gap and the pumping seal. The capillary seal forms a fluid reservoir (18) for storage of fluid.