Patent ID: 8182154

Claim:
A fluid dynamic bearing system comprising: at least one stationary part that has a shaft ( 14 ) and two bearing plates ( 18 ; 20 ), an upper and a lower bearing plate, disposed on the shaft at a mutual spacing, at least one rotating part that is supported so as to rotate about a rotational axis ( 24 ) with respect to the stationary part, and comprises a bearing bush ( 16 ) and a sleeve ( 22 ) that is connected to a hub enclosing the bearing bush, the bearing bush being rotatably disposed on the shaft between the bearing plates, a bearing gap ( 26 ) that is formed between opposing bearing surfaces of the stationary and the rotating part, and separates the opposing surfaces of the shaft, the bearing bush, the bearing plates and the sleeve from one another, wherein the bearing gap is filled with bearing fluid, a first sealing gap ( 40 ) and a second sealing gap ( 42 ) that extends concentric to the rotational axis ( 24 ) for sealing the bearing gap ( 26 ), the sealing gap being proportionately filled with bearing fluid, a first fluid dynamic radial bearing ( 32 ) and a second fluid dynamic radial bearing ( 34 ) that are formed by adjoining surfaces of the shaft and of the bearing bush and separated from one another by a separator region disposed on the shaft and within the bearing gap, a first fluid dynamic axial bearing ( 36 ) and a second fluid dynamic bearing ( 38 ), and at least one recirculation channel ( 28 ) in the region of the sleeve and/or the bearing bush that connects the two axial bearing regions to each other, characterized in that, at least in sections, the first and second sealing gaps ( 40 , 42 ; 142 ) are inclined with respect to the rotational axis ( 24 ) at angles α and β respectively, wherein angle α of the first sealing gap ( 40 ) located upstream of the prevailing direction of flow ( 46 ) of the bearing fluid in the recirculation channel ( 28 ) is greater than angle β of the sealing gap ( 42 ) located downstream, wherein the prevailing direction of flow of the bearing fluid in the recirculation channel ( 28 ) is from the first axial bearing region to the second axial bearing region.