Impeller structure for a water pump rotor and a water pump using same

Abstract

An impeller and a water pump using same are disclosed. The impeller is mounted in a volute casing of the water pump and includes a base and a top cover, and a plurality of vanes provided therebetween. At least one of the top cover and the base is provided on an outer side surface thereof with a fluid-impeding flange to increase flow resistance in a cavity in the volute casing below the impeller, such that less fluid flows into the cavity below the impeller and the impeller in rotating would not be lifted by an upward force of buoyancy of the fluid, preventing the impeller top cover from impacting and rubbing against an inner side surface of the volute casing and largely reducing the frictional resistance and power consumption of the impeller. Therefore, the impeller produces less noise and enables upgraded operating efficiency, increased flow and prolonged service life.

1 . An impeller structure for a water pump rotor, comprising:
 an impeller including an impeller base, an impeller top cover, and a plurality of vanes provided between the impeller base and the impeller top cover; the impeller top cover being provided with a centered eye; the impeller top cover having an outer side surface defining an impeller top surface and the impeller base having an outer side surface defining an impeller bottom surface; and at least one of the impeller bottom surface and the impeller top surface being provided with at least one fluid-impeding flange.   
     
     
         2 . The impeller structure for a water pump rotor as claimed in  claim 1 , wherein the fluid-impeding flange is provided on around an outer periphery of the impeller bottom surface. 
     
     
         3 . The impeller structure for a water pump rotor as claimed in  claim 1 , wherein the impeller base and the impeller top cover are spaced from one another by a dividing space; the vanes being located in the dividing space; and the centered eye on the impeller top cover being communicable with the dividing space. 
     
     
         4 . The impeller structure for a water pump rotor as claimed in  claim 1 , wherein the impeller top surface is located on the outer side surface of the impeller top cover that faces upward, and the impeller bottom surface is located on the outer side surface of the impeller base that faces downward. 
     
     
         5 . A water pump, comprising:
 a volute casing including an inlet, an outlet, and a volute chamber; and the volute chamber being defined in the volute casing and communicable with the inlet and the outlet; and   an impeller being mounted in the volute chamber and including an impeller base, an impeller top cover, and a plurality of vanes provided between the impeller base and the impeller top cover; the impeller top cover being located below the inlet and being provided with a centered eye, which is aligned with the inlet; the impeller top cover having an outer side surface defining an impeller top surface and the impeller base having an outer side surface defining an impeller bottom surface; and at least one of the impeller bottom surface and the impeller top surface being provided with a fluid-impeding flange.   
     
     
         6 . The water pump as claimed in  claim 5 , wherein the fluid-impeding flange is provided on around an outer periphery of the impeller bottom surface. 
     
     
         7 . The water pump as claimed in  claim 5 , wherein the impeller base and the impeller top cover are spaced from one another by a dividing space; the vanes being located in the dividing space; and the centered eye on the impeller top cover being communicable with the dividing space. 
     
     
         8 . The water pump as claimed in  claim 5 , wherein the inlet is provided on an upper side of the volute casing and the outlet is provided on one of a left and a right side of the volute casing. 
     
     
         9 . The water pump as claimed in  claim 5 , wherein the impeller top surface is located on the outer side surface of the impeller top cover that faces upward, and the impeller bottom surface is located on the outer side surface of the impeller base that faces downward.