Patent ID: 8021133
Filing Date: 2011-09-20
Classification: F04B,F04D

Abstract:
1. A feed pump with a variable-speed drive for metered dispensing of a controlled quantity of a feed fluid, wherein: said feed pump is constructed as a single-stage centrifugal pump comprising a radial wheel having a centrifugal structure arranged in an impeller chamber of a pump casing so as to be rotatable in order to convey a fluid between a pump inlet and a pump outlet; said radial wheel being connected to a variable speed drive motor, receiving a flow centrally, being provided with a plurality of feed ducts, and having an outside diameter (D wherein said variable speed drive motor has a five digit range of rotational speed; and said feed pump being designed for partial-load operation at feed quantities ranging from 0 ml/min to 3600 ml/min and with lifts of 20 meters to 300 meters; said impeller chamber has an inside diameter (D a seal is arranged between the pump casing and one of a hub of the radial wheel and a drive shaft for the radial wheel; wherein the pump outlet is provided on the circumference of the impeller chamber, wherein the pump outlet is arranged substantially tangentially to the outside diameter (D the pump casing is provided with a heat regulating device, and fluid tight connections connect the heat regulating device to heat regulating media and connect the impeller chamber to a system into which fluid is dispensed by the feed pump.