| 摘要 |
A positive displacement pump has three blades (1), which rotate with an outer housing (4) about a first axis offset relative to the axis of rotation of an inner member (2). As the blade (1) and the inner member (2) rotate simultaneously, the blades (1), for part of their rotation, sweep through pockets (26) defined in the inner member (2) until a separator (3) divides the pocket (26) at the end of this vacuum stroke, transferring part of the pocket (26), under vacuum, to the compressed fluid in the next adjacent pocket (26) between the two immediately preceding blades (1). In alternative embodiments, only a single blade (1) may be provided, which may be stationary, and both the inner member (2) and the separator (3) may be rotated. |
