| 摘要 |
<p>A pump rotor for a screw pump includes a shaft (42), a first set of threads (44) disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove (48) disposed on an end portion thereof, and a ring seal (60) disposed on the groove (48) such that the ring seal is configured to protrude outwardly from the groove and to rest against an inner surface (49) of a liner (51) of the screw pump, and the groove (48) is sized so as to allow the ring seal (60) to move radially with respect to the plurality of threads (44) as the rotor is deflected.</p> |
