| 摘要 |
<p>A pump housing has: a cylindrical interior surface having outlets; and a pair of side surfaces defining, in combination with the interior surface, a substantially cylindrical chamber, said surfaces having inlets. A rotor has a void, lobes and, for each lobe, a throughpassage, and is: positioned in said chamber such that: the void communicates with the inlet to receive fluid; and the throughpassage for each lobe provides communication between the void and chamber; rotatably mounted in the chamber such that the lobes traverse the cylindrical surface. Provided for each outlet is a vane. As the rotor turns, the rotor outer surface is traversed by the vane to, create, as the vane traverses a throughpassage: a chamber ahead of said vane which increases in volume and communicates with said throughpassage; and a chamber behind said vane which decreases in volume and communicates with said outlet port.</p> |
