Volute shaped pump casing with splitter rib

摘要

A volute shaped pump casing for a centrifugal pump includes a chamber for housing at least one impeller rotatable around an axis of rotation and a volute shaped chamber which forms a flow channel and which contains a splitter rib for dividing the flow channel formed wherein in a section perpendicular to the axis of rotation a mean camber line is positioned equidistantly between an inner and outer surface of the splitter rib, where the thickness of the splitter rib is varied along the mean camber line and for the mean camber line unwrapped to a straight line there is a maximum in the thickness, s, of the splitter rib, wherein said maximum is positioned at a distance L from the leading edge of the splitter rib, and wherein the distance L is in the range between 1.4 times the maximum thickness s and 6 times the maximum thickness s.

主权项

1. A volute shaped pump casing for a centrifugal pump including a chamber for housing at least one impeller rotatable around an axis of rotation and including a volute shaped chamber which forms a flow channel and which contains a splitter rib for dividing the flow channel formed, characterized in that in a section perpendicular to the axis of rotation a mean camber line is positioned equidistantly between an inner and outer surface of the splitter rib, in that the thickness of the splitter rib is varied along the mean camber line and for the mean camber line unwrapped to a straight line there is a maximum in the thickness of the splitter rib, with the thickness at said maximum being called maximum thickness s, and in that said maximum is positioned at a distance L from the leading edge of the splitter rib wherein the distance L is in the range between 1.4 times the maximum thickness s and 6 times the maximum thickness s, wherein for a distance from the leading edge of the splitter rib just outside the range of the distance L the thickness of the splitter rib is smaller than the maximum thickness s.