CENTRIFUGAL PUMP STAGE WITH ROUNDED IMPELLER FLOW PASSAGE OUTLET TO REDUCE EROSION

Claims

A submersible electric pump includes a shaft, a motor mechanically coupled to the shaft, and an impeller rotationally coupled to the shaft. The impeller includes a first hub and a first cover. The first cover is arranged concentrically around the first hub and has a first axial end and a second axial end. The second axial end is arranged radially outward with respect to the first axial end. An inclination of an inner surface of the first cover near the second axial end is within 20 degrees of being parallel to a longitudinal axis of the drive shaft. The impeller further includes first vanes extending from the first hub to the first cover. The submersible electric pump also includes a diffuser fluidly coupled to the impeller.The diffuser includes a second cube, a second cover arranged concentrically around the second cube, and second vanes extending from the second cube to the second cover.