Lubricating system for a centrifuge drive
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United States of America Patent
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Sep 15, 2009
Grant Date -
Apr 30, 2009
app pub date -
Aug 3, 2007
filing date -
Feb 3, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A centrifuge, in particular a separator, having a rotating, vertically oriented drive spindle, which is supported on a machine frame by a bearing device, which exhibits at least one step bearing or lower thrust bearing and preferably one upper collar bearing, which are arranged in a common frame and lubrication space, which in its lower region is fashioned as an oil pan, the step bearing being enclosed by a cup element having a cylindrical outer shell and one open axial end and one closed axial end, through which cup element the drive spindle passes in centric fashion, the drive spindle and the cup element being connected to each other so as to be rotationally fixed relative to each other, a fin, which rotates along with the drive spindle, serving to generate a flow of air. Here the at least one fin is arranged directly on the drive spindle or on an element rotating with the drive spindle inside the cup element below the step bearing, and the cup element is provided with one or a plurality of penetrations or holes, so that an underpressure or partial vacuum can be generated when the centrifuge is in operation, which underpressure draws the swirled-up oil mist of air and oil through the holes of the cup element into the cup element and from the top through the step bearing.
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