Impeller For A Pump

Abstract

An impeller for a pump, in particular for a cooling water pump of an internal combustion engine, having an impeller body having a hub, a suction-side cover disk having a central opening for suctioning a delivery medium, and having at least one blade, which is connected in one piece to the suction-side cover disk, and which has an inner section in the area of the central opening and an outer section in the area of the suction-side cover disk, the blade being implemented as three-dimensionally curved in the inner section and essentially two-dimensionally in the outer section, the impeller having a pressure-side cover disk, which is implemented as a separate part and is fixedly rotationally connected to the impeller body. The pressure-side cover disk has at least one grooved depression, shaped corresponding to the front face and the profile of the blade, for the blade for the formfitting connection thereto, on the side facing toward the blade, the impeller being produced in a casting method and each blade being free of overlaps and undercuts.

1 . An impeller for a pump, in particular for a cooling water pump of an internal combustion engine, having an impeller body having a hub, a suction-side cover disk having a central opening for suctioning a delivery medium, and having at least one blade, which is integrally connected to the suction-side cover disk, and which has an inner section in the area of the central opening and an outer section in the area of the suction-side cover disk, the blade being implemented as three-dimensionally curved in the inner section and essentially two-dimensionally in the outer section, the impeller has a pressure-side cover disk, which is implemented as a separate part and is fixedly rotationally connected to the impeller body, wherein the pressure-side cover disk has at least one grooved depression, which is shaped corresponding to the front face and the profile of the blade, for the blade for the positive connection thereto on the side facing toward the blade, the impeller being produced in a casting method and each blade being free of overlaps and undercuts. 
     
     
         2 . The impeller according to  claim 1 , wherein a diameter of the pressure-side cover disk at least corresponds to a diameter of an adjoining ring space, which is formed between the impeller shaft and housing. 
     
     
         3 . The impeller according to  claim 2 , wherein the diameter of the pressure-side cover disk essentially corresponds to a diameter of a shaft seal, which delimits the ring space. 
     
     
         4 . The impeller according to  claim 2 , wherein the diameter (d 1 ) of the pressure-side cover disk essentially corresponds to a diameter (d 2 ) of the suction-side cover disk. 
     
     
         5 . The impeller according to  claim 1 , wherein the pressure-side cover disk is planar. 
     
     
         6 . The impeller according to  claim 1 , wherein the pressure-side cover disk is concavely curved on a side facing toward the blade. 
     
     
         7 . The impeller according to  claim 1 , wherein each blade is two-dimensionally curved and is perpendicular to the plane of the suction-side cover disk in the area of the suction-side cover disk. 
     
     
         8 . (canceled) 
     
     
         9 . The impeller according to  claim 1 , wherein a wall thickness (s 1 ) of the pressure-side cover disk essentially corresponds to a wall thickness (s 2 ) of the suction-side cover disk.