Rotor sleeve for a centrifugal separator
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United States of America Patent
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Nov 5, 1996
Grant Date -
N/A
app pub date -
Jan 16, 1996
filing date -
Jan 16, 1996
priority date (Note) -
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Abstract
A centrifugal separator includes a rotor sleeve which reduces the fine scale mixing of liquid components. The rotor sleeve in the annular mixing zone minimizes liquid-liquid shear, but does not adversely affect the pumping action of the rotor. The separator comprises a housing having a generally cylindrical inner surface defining an interior chamber. A hollow rotor is disposed within the chamber for rotation therein, the rotor having upper and lower openings and a generally cylindrical rotor wall with an inner and outer surface. The outer surface of the rotor wall is spaced apart from the inner surface of the housing and thereby defines the annular mixing zone. The rotor sleeve comprises a cylinder only slightly larger than the rotor. The sleeve is fixed relative to the housing, thereby preventing liquid within the annular mixing zone from contacting the rotating outer surface of the rotor. The reduction in mixing action dramatically increases the separation efficiency for shear-sensitive liquid mixtures.
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