FLUID BEARING DEVICE AND MAGNETIC DISK DEVICE USING FLUID BEARING DEVICE

• Main Author: KAWANO, TAKUMI
• Format: Patent
• Language: English; French
• Published: 02.11.2000
• Edition: 7
• Subjects: BEARINGS; BLASTING; CHEMISTRY; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; FUELS; 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; LUBRICANTS; LUBRICATING COMPOSITIONS; MECHANICAL ENGINEERING; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THERMAL INSULATION IN GENERAL; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION; WEAPONS

A fluid bearing device which fills a conductive lubricant (6) containing an electrostatic charge preventive agent in a bearing clearance between a bearing sleeve (2) (sleeve 2) and bearing shaft (3) (shaft 3), and a magnetic disk device using this fluid bearing device. This configuration enables to continuously discharge static electricity charged in the shaft (3), a rotary part, to the sleeve (2), a fixed part, through the conductive lubricant (6). Accordingly, electrostatic charge is not built up in the shaft (3), which is the rotary part, even at high speed rotation. Cette invention concerne un dispositif à palier fluide rempli par un lubrifiant conducteur (6) qui renferme un agent anti-charge électrostatique dans un espace entre un manchon (2) et un arbre de palier (3), ainsi qu'un dispositif à disque magnétique utilisant ledit palier fluide. Ce montage permet de faire passer en permanence l'électricité statique contenue dans l'arbre (3), pièce tournante, dans le manchon (2), pièce fixe, via le lubrifiant conducteur (6). On évite ainsi la formation d'une charge d'électricité statique dans l'arbre (3), même lorsque sa vitesse de rotation est élevée.