Gear pump with a valve arranged between a suction side and a pressure side of the gear pump
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United States of America Patent
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Oct 18, 2011
Grant Date -
Jul 2, 2009
app pub date -
May 14, 2007
filing date -
May 12, 2006
priority date (Note) -
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Abstract
Gearwheel pump, having a housing with at least two intermeshing gears with shafts supported by slide bearings lubricated with pumping medium (M) fed from a suction side to a pressure side, a return duct which leads pumping medium which flows outward through the plain bearing back to the suction side, and a valve (5) having a stationary part and a moveable part (20, 21). The valve (5) has a setting characteristic which runs, as a first approximation, linearly at least in one region, wherein the setting characteristic is defined by a differential pressure (.DELTA.p) across the valve as a function of a setting path (x) in the valve (5) thereby significantly improving capability for setting the pressure in the transition region between the plain bearing and a dynamic seal of a driveshaft which is guided outward.
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