Automobile water pump with permanent magnetic coupling

Abstract

The present invention refers to a leakageless water pump in which the rotation of the motor is transmitted to the impeller by means of a pair of plates on which magnets are equipped. A partition is mounted in the casing of the pump to separate the pair of blades with each other. One one side of the partition is the rotating axle on which one of the pair of plates is fixed. On the other side of the partition is a stationary axle on which the other plate integral with the impeller is freely rotatable supported. The pump can be used in a car to eliminate the leakage of the water and to prolong the life of the pump.

What I claim is:  
     
         1 . A water pump with a permanent magnetic coupling comprising: 
 a pump casing provided with a partition therein;    a rotary shaft in said pump casing;    a stationary shaft separated from said rotary shaft by said partition in said pump casing and having two ends, one of which is fixed to said pump casing;    a pump impeller sleeved on the other end of the stationary shaft; and    a panel type permanent magnetic coupling comprising a driving magnetic plate coupled to said rotary shaft, and a driven magnetic plate coupled to said impeller, said two magnetic plates are coaxial and positioned at opposite sides of said partition.    
     
     
         2 . The pump according to  claim 1 , wherein said driving magnetic plate of said panel type permanent magnetic coupling is identical to said driven magnetic plate of said panel type permanent magnetic coupling, each of said magnetic plates has a surface with magnets fitted thereon, said surface of said driving magnetic plate is faced with that of said driven magnetic plate.  
     
     
         3 . The pump according to  claim 1 , wherein each magnetic plate of said panel type permanent magnetic coupling consists of an annular ferreous plate and a plurality of permanent magnets arranged at a surface of said ferrous plate, said magnets are arranged along the circumference of the annular surface into an annular ring and magnetized with alternative N and S poles, the number of the said magnets  32  is even.  
     
     
         4 . The pump according to  claim 3 , wherein adjacent magnets closely contact with each other, or there is clearance between each two adjacent magnets.  
     
     
         5 . The pump according to  claim 1 , wherein said partition is made from non-magnetic metallic material or macromolecule non-metallic material.  
     
     
         6 . The pump according to  claim 1 , wherein a bearing is positioned between said impeller and said stationary shaft.