| 摘要 |
The subject invention is directed to a vane-type pump which includes a pump housing having interior surfaces defining a pumping chamber having a diameccentric configuration. A diameccentric configuration is defined for purposes of this invention as a substantially circular shaped body whose constant diameter rotates about a point which is offset with respect to the centroid of that shaped body. The diameccentrically configured pumping chamber includes a perimeter section, a front wall, a rear wall, an intake port, a discharge port, an intake region, and a discharge region. A pump rotor is disposed within and is diameccentric to the pumping chamber for rotation within the pumping chamber for pressurizing and pumping a fluid. The pumping chamber, which typically has a generally elliptical shape, has a substantially uniform diameter when measured through the longitudinal center of the rotor. The perimeter of the pumping chamber in the discharge region has a shape such that fluid is discharged through the discharge port in a substantially uniform, non-pulsating flow.
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