FLUID BEARING WITH NON-UNIFORM GROOVES

• Main Authors: LYNN BICH-QUY LE, PACO GREGOR FLORES
• Format: Patent
• Language: English
• Published: 09.06.2014
• Subjects: BEARINGS; BEER; BIOCHEMISTRY; BLASTING; CHEMISTRY; COMPOSITIONS THEREOF; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CULTURE MEDIA; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; 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; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; PHYSICS; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SPIRITS; THERMAL INSULATION IN GENERAL; VINEGAR; WEAPONS; WINE

PROBLEM TO BE SOLVED: To provide a fluid dynamic bearing which can sufficiently satisfy bearing stiffness required for, e.g., motors used for computer hard drives.SOLUTION: The fluid dynamic bearing includes a set of pressure-generating grooves. The set of pressure-generating grooves includes a plurality of chevron-shaped grooves. Each chevron-shaped groove includes at least two selected from a non-uniform depth, a non-uniform angle, a non-uniform width and a non-uniform length, selected to provide a predetermined spindle-motor stiffness to a journal bearing (120) during steady-state operation and during a shock event.