To provide a Wesco pump reducing the pump noise caused by the pulsation of the fluids and impact.
This Wesco pump comprises an impeller 10 having blade grooves 12 on front and rear faces, and rotated and driven, a first pump channel 51 having a suction port 52 and a discharge port 53 formed corresponding to the blade groove 12 at the front side of the impeller 10, a second pump channel 71 having a suction port 72 and a discharge port 73 formed corresponding to the blade groove 12 at the rear side of the impeller 10, and meeting passages 50, 62 for allowing the fluids respectively discharged from the discharges ports 53, 73 to meet. Further, a pulsation canceling means for canceling the phases of the pulsation of the fluids discharged from each of the discharge ports 53, 73, and an impact reducing means for reducing the impact relating to the conversion of the flow of the fluids from each of the pump channels 51, 71 to the discharge ports 53, 73, are mounted.
IKETANI MASANORI
Tetsuo Fukuda
Tatsuhiko Inukai
Atsuko Nakamura