MAGNETIC VISCOUS FLUID AND CLUTCH USING THE SAME

PROBLEM TO BE SOLVED: To provide a magnetic viscous fluid which is not only hard to cause magnetic particle settling, secondary agglomeration and the like, but also small in shear stress even in a region with a high shear rate.SOLUTION: A magnetic viscous fluid comprises: a magnetic particle mixture...

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Bibliographische Detailangaben
Hauptverfasser:	UESHIMA YUYA, NOMA JUNICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING BRAKES CHEMISTRY CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ELECTRICITY ENGINEERING ELEMENTS AND UNITS FUELS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INDUCTANCES LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MAGNETS MECHANICAL ENGINEERING METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TECHNICAL GASES CONTAINING CARBON MONOXIDE THERMAL INSULATION IN GENERAL TRANSFORMERS USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a magnetic viscous fluid which is not only hard to cause magnetic particle settling, secondary agglomeration and the like, but also small in shear stress even in a region with a high shear rate.SOLUTION: A magnetic viscous fluid comprises: a magnetic particle mixture; and a dispersant with the magnetic particle mixture dispersed therein. The magnetic particle mixture includes first magnetic particles and second magnetic particles. The first magnetic particles each have a first magnetic particle main body, and a first surface-modification layer provided on the surface of the first magnetic particle main body. The second magnetic particles each have a second magnetic particle main body, and a second surface-modification layer provided on the surface of the second magnetic particle main body. The first magnetic particles have an average particle diameter of 1-50 μm. The second magnetic particles have an average particle diameter of 50-200 nm, and account for 0.5-2 wt% of the magnetic particle mixture.