Feed pump
AssigneeMannesmann VDO AG
InventorHelmut Nather
Life of this patent
Estimating the term…
Abstract
In an impeller of a feed pump designed as a side channel pump, each of the vane chambers are divided into two sectors which are arranged in an undercut-free design relative to a direction perpendicular to the end face of the impeller. When the impeller is manufactured from plastic by injection molding, the sectors may be produced by projections arranged on mold halves intended for the manufacture of the impeller. After the production of the impeller, the projections in the mold halves having the geometric shape of the sectors may be drawn axially apart from one another in one simple step, thereby providing a cost-effective production of the impeller.
Claims9
A feed pump, comprising a casing comprising part-annular channels, an inlet duct, and an outlet duct and a driven impeller rotatably arranged in said casing and comprising a first end face, a second end face, and a ring of guide vanes delimiting vane chambers which pass through said driven impeller from said first end face to said second end face of said driven impeller, wherein said vane chambers and said part-annular channels define a feed chamber in said casing for feeding a liquid from said inlet duct to said outlet duct, each of said vane chambers comprising at least two sectors adjoining one another, wherein each of said two sectors is contiguous to one of said first and second end faces and said each of said two sectors comprises an undercut-free design relative to a direction perpendicular to said one of said first and second end faces so that a projection in the form of said each of said two sectors may be removed from said impeller in the direction perpendicular to said one of said first and second end faces without obstruction.
A feed pump, comprising a casing comprising part-annular channels, an inlet duct, and an outlet duct and a driven impeller rotatably arranged in said casing and comprising a ring of guide vanes delimiting vane chambers which pass from a first end face to a second end face of said driven impeller, wherein said vane chambers and said part-annular channels define a feed chamber in said casing for feeding a liquid from said inlet duct to said outlet duct, each of said vane chambers comprising at least two sectors adjoining one another, wherein each of said two sectors is contiguous to one of said first and second end faces and said each of said two sectors comprises an undercut-free design relative to a direction perpendicular to said one of said first and second end faces so that a projection in the form of said each of said two sectors may be removed from said impeller in the direction perpendicular to said one of said first and second end faces without obstruction, and wherein a tangential cross-section of each of said guide vanes comprises an L-shaped design.
Dependencies are inferred from the claim text.