| 摘要 |
<p>A tandem pump comprises a piston pump (1) and a semi-rotary cell pump (2) which have a common drive shaft (4). The semi-rotary cell pump (2) is mounted at the back of the piston pump (1) on the drive shaft end. The pump has a movable element structure, the piston pump (1) being arranged into a piston casing (3) open on the front and the semi-rotary cell pump (2) being arranged into a semi-rotary cell pump casing (5) open on the front, an intermediary cover (6) being arranged between the two open fronts adjacent to each other. The intermediary cover (6) interconnects the two casings (3, 5) and has a central hollow wherein the drive shaft (4) is arranged. Into the front wall (13) of the intermediary cover (6) which is adjoined to the semi-rotary cell pump (2), there is cast the control mirror (reniform suction cavities (14), reniform pressure cavities (15)) for the semi-rotary cell pump (2). </p> |
