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Mecos Traxler Ag

Alfons Traxler

Roland Siegwart

Friedrich Konig

Philip Buhler

A vacuum centrifuge has a cylindrical centrifuge housing forming a vacuum chamber and a cylindrical centrifuge pot is coaxial with the vacuum chamber. An elongated hollow shaft extends externally and coaxially from the cylindrical centrifuge pot and forms a passage for an elongated thread carrier tube extending into the pot. At least one magnetic bearing and a motor surround the elongated hollow shaft. An annular wall connects a terminal end of the elongated hollow shaft to the cylindrical centrifuge pot and forms a boundary surface within the vacuum chamber in which the centrifuge pot is located.

Vaccum centrifuge with magnetic bearings and sealing method

A magnetic bearing supports an object such as a rotor in a stable, contactless position. The bearing has electromagnets, each associated with a respective current control means (e.g., amplifier or power switch), disposed to exert magnetic forces in various directions to levitate the rotor. A constant-current source feeds a constant (total) current the electromagnets in parallel. Sensing means detect movements of the rotor from the position and inform a controller that responds by controlling the respective current to each electromagnet to maintain the rotor in position.

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Winterthur, Switzerland

Alfons Traxler