Electric water pump rotating in the correct direction

Abstract

An electric water pump rotating in the correct direction, comprising a water pump body ( 2 ) that has a chamber ( 3 ), which is basically cylindrical in shape, and a chamber cover ( 8 ), which is fitted at the axial outward end of said chamber ( 3 ); an impeller ( 42 ) is accommodated and rotates inside said chamber ( 3 ) coaxially; said impeller ( 42 ) includes at least two impeller vanes ( 45 ) that project from the impeller disc surface ( 44 ) and said impeller vanes ( 45 ) bend to the same direction around the rotating axis OO′ of said disc surface ( 44 ); Assuming V as the volume inside said chamber ( 3 ) and v as the volume enveloped by all the said impeller vanes ( 45 ) when said impeller ( 42 ) rotates, a design can be made about relations of geometrical parameters between volume of said chamber ( 3 ) in said electric water pump and said volume enveloped by all the impeller vane ( 45 ) rotating inside said chamber ( 3 ) to be in the following range, i.e., ratio between volume enveloped by all the said impeller vane ( 45 ) in rotation and volume of said chamber ( 3 ): v/V=0.08˜0.18, then said impeller ( 42 ) will rotate in the direction against that of all the impeller vane ( 45 ) bend to, and liquid resistance will be less and water output higher at this time. The said electric water pump has a correct design in relations of geometrical parameters between the volume of said chamber ( 3 ) and the volume of said impeller ( 42 ) rotating inside said chamber ( 3 ), thus making it possible to install the single-phase synchronous or asynchronous motors, which are simple in structure and low in cost, to drive said water pumps while ensuring correct rotating direction each time when said water pumps are started with high output.

1 . An electric water pump rotating in the correct direction, comprising 
 a water pump body that has a chamber, which is basically cylindrical in shape, and a chamber cover, which is fitted at the axial outward end of said chamber;    an impeller is accommodated and rotates inside said chamber coaxially;    said impeller includes at least two impeller vanes that project from the impeller disc surface and said impeller vanes bend to the same direction around the rotating axis OO′ of said disc surface;    being characterized in that,    Assuming V as the volume inside said chamber and v as the volume enveloped by all the said impeller vanes when said impeller rotates, a design can be made about relations of geometrical parameters between volume of said chamber in said electric water pump and said volume enveloped by all the impeller vanes rotating inside said chamber to be in the following range, i.e., ratio between volume enveloped by all the said impeller vanes in rotation and volume of said chamber:       v/V= 0.08˜0.18,    then said impeller will rotate in the direction against that of all the impeller vanes bend to, and liquid resistance will be less and water output higher at this time.    
   
   
       2 . An electric water pump according to  claim 1 , being characterized in that, 
 Assuming D and H as the internal diameter and axial height of said chamber, d and h as the diameter of volume enveloped by all the impeller vanes and axial height of all the impeller vanes when said impeller rotates, a design can be made also about relations of geometrical parameters between volume of said chamber in said electric water pump and said volume enveloped by all the impeller vanes rotating inside said chamber to be in the following range, i.e., ratio between diameter of the volume enveloped by all the said impeller vanes in rotation and diameter of volume of said chamber:       d/D= 0 . 618 ˜ 0 . 820 ,      and ratio between axial height of the vanes and axial height of the chamber,       h/H= 0.12˜0.38.    then said impeller will rotate in the direction against that of all the impeller vanes bend to, and liquid resistance will be less and water output higher at this time.    
   
   
       3 . An electric water pump rotating in the correct direction, comprising: 
 a water pump body that has a chamber, which is basically cylindrical in shape, and a chamber cover, which is fitted at the axial outward end of said chamber;    an impeller is accommodated and rotates inside said chamber coaxially;    said impeller includes at least two impeller vanes that project from the impeller disc surface and said impeller vanes bend to the same direction around the rotating axis OO′ of said disc surface;    being characterized in that,    Assuming D and H as the internal diameter and axial height of said chamber, d and h as the diameter of volume enveloped by all the impeller vanes and axial height of all the impeller vanes when said impeller rotates, a design can be made also about relations of geometrical parameters between volume of said chamber in said electric water pump and said volume enveloped by all the impeller vanes rotating inside said chamber to be in the following range, i.e., ratio between diameter of the volume enveloped by all the said impeller vanes in rotation and diameter of volume of said chamber:       d/D= 0.618˜0.820,    and ratio between axial height of the vanes and axial height of the chamber,       h/H= 0.12˜0.38.    then said impeller will rotate in the direction against that of all the impeller vanes bend to, and liquid resistance will be less and water output higher at this time.    
   
   
       4 . An electric water pump according to  claim 1 , being characterized in that quantity of the vanes on the electric water pump impeller is 2 to 8.  
   
   
       5 . An electric water pump according to  claim 1 , being characterized in that the diameter D of said chamber is 45 mm, the axial height H 16 mm; the diameter d of said impeller rotating inside said chamber is 29 mm and the axial height h of said impeller vanes 6 mm; the quantity of said impeller vanes is 5.  
   
   
       6 . An electric water pump according to  claim 1 , being characterized in that the diameter D of said chamber is 48 mm, the axial height H 20.7 mm; the diameter d of said impeller rotating inside said chamber is 32.5 mm and the axial height h of said impeller vanes 8 mm; the quantity of said impeller vanes is 5.  
   
   
       7 . An electric water pump according to  claim 1 , being characterized in that the diameter D of said chamber is 56 mm, the axial height H 23 mm; the diameter d of said impeller rotating inside said chamber is 38 mm and the axial height h of said impeller vanes 8.5 mm; the quantity of said impeller vanes is 5.  
   
   
       8 . An electric water pump according to  claim 1 , being characterized in that the diameter D of said chamber is 60 mm, the axial height H 26 mm, the diameter d of said impeller rotating inside said chamber is 42 mm and the axial height h of said impeller vanes 10 mm; the quantity of said impeller vanes is 5.  
   
   
       9 . An electric water pump according to  claim 1 , being characterized in that quantity of the vanes on the electric water pump impeller is 2 to 15.