Rotary pump inlet velocity profile control device.

摘要

A rotary pump (10) with an inlet flow duct (32) having a convergent section upstream the tips of the rotor blades (22). The convergent section (B) decreases the cross-sectional flow area of the inlet flow duct (32) prior to the flow being introduced into the rotor (18), thereby creating a substantially uniform velocity profile in the flow just upstream the rotor blades (22).