Hydraulic dynamic bearing and spindle motor having the bearing and rotary assembly provided with the spindle motor

To realise a hydraulic dynamic pressure bearing (A) which is high in generation efficiency of a dynamic pressure, a spindle motor using the hydraulic dynamic pressure bearing (A) and a rotary assembly using the spindle motor, there are provided a thrust bearing movable member (1) and a thrust bearin...

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Bibliographische Detailangaben
1. Verfasser:	NAMIKI, HIROAKI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BEARINGS BLASTING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEATING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LIGHTING MECHANICAL ENGINEERING PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	To realise a hydraulic dynamic pressure bearing (A) which is high in generation efficiency of a dynamic pressure, a spindle motor using the hydraulic dynamic pressure bearing (A) and a rotary assembly using the spindle motor, there are provided a thrust bearing movable member (1) and a thrust bearing fixed member (2) with a dynamic pressure generating groove (3) being formed on an overlap surface of the thrust bearing movable member (1) or an overlap surface of the thrust bearing fixed member (2). The dynamic pressure generating groove (3) is formed with a cross section such that it is gradually deepened on a side into which fluid is introduced in a longitudinal direction and a transverse direction of the groove (3), and is abruptly deepened on a side from which fluid is discharged in the longitudinal direction and the transverse direction of the groove (3) to thereby enhance the dynamic pressure generation efficiency.