rotor de bomba para uma bomba helicoidal, método de reduzir fluxo de desvio em uma bomba helicoidal e bomba helicoidal gêmea

摘要

A pump rotor for a screw pump, comprising a shaft, a thread on the shaft, the thread comprising a groove disposed on an outer surface thereof, and a seal disposed in the groove. The seal and the groove are configured to retain the seal in the groove while allowing radial displacement of the seal with respect to the thread as the pump rotor is deflected.