Magnetically coupled mixer with thrust bearing friction control

Magnetically coupled mixer having an impeller magnetically coupled to a drive shaft and thrust bearings that support the impeller. The drive shaft can be moved along its axis, and an upwardly directed axial force is applied to the drive shaft to partially offset downward forces exerted by the impell...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Rozy, Yoram, Embury, Mark R, Morgan, Joseph Benjamin
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	Magnetically coupled mixer having an impeller magnetically coupled to a drive shaft and thrust bearings that support the impeller. The drive shaft can be moved along its axis, and an upwardly directed axial force is applied to the drive shaft to partially offset downward forces exerted by the impeller and thereby reduce friction between the thrust bearing surfaces while maintaining contact between them. In one disclosed embodiment, the force is applied to the drive shaft by a pair of magnets arranged so that the magnetic fields interact to produce the force, and the magnitude of the force is controlled by adjusting the distance between the magnets. The forces exerted by the impeller can be monitored and utilized in controlling the magnitude of the force applied to the shaft.