Centrifugal pump

Abstract

A housing of a centrifugal pump includes a fluid inlet, a fluid outlet, and an accommodation chamber. An impeller of the pump is disposed in the accommodation chamber and includes at least one venthole axially penetrating the impeller. A drive member is fixed to one side of the housing and corresponds to the impeller for providing electromagnetic force required for rotation of the impeller. A central shaft penetrates the center of the impeller and axially extends to the drive member.

1 . A centrifugal pump, comprising: 
 a housing having an inlet, an outlet, and an accommodation chamber;    an impeller disposed in the accommodation chamber and comprising at least one venthole penetrating the impeller;    a drive member fixed to one side of the housing and corresponding to the impeller for providing electromagnetic force required for rotation of the impeller; and    a shaft penetrating the center of the impeller and axially extending to the drive member.    
   
   
       2 . The centrifugal pump as claimed in  claim 1 , wherein the impeller further comprises a rotating portion and a plurality of blades, the venthole axially penetrates the rotating portion, and the blades are formed on a surface of the rotating portion.  
   
   
       3 . The centrifugal pump as claimed in  claim 1 , wherein the inlet, outlet, and accommodation chamber are communicated with one another.  
   
   
       4 . The centrifugal pump as claimed in  claim 1 , wherein a gap exists between the housing and the impeller.  
   
   
       5 . The centrifugal pump as claimed in  claim 1 , wherein the housing further comprises a cover and an outer frame, the accommodation chamber is between the cover and the outer frame, the inlet and outlet are formed and extend in the cover.  
   
   
       6 . The centrifugal pump as claimed in  claim 5 , wherein the outer frame surrounds the drive member, preventing a fluid from entering the drive member.  
   
   
       7 . The centrifugal pump as claimed in  claim 5 , wherein the housing further comprises a base opposite to the cover, and the drive member is fixed to the base.  
   
   
       8 . The centrifugal pump as claimed in  claim 1 , wherein the shaft comprises a spiral groove on the surface thereof.  
   
   
       9 . The centrifugal pump as claimed in  claim 8 , wherein the spiral direction of the spiral groove corresponds to the rotational direction of the impeller.  
   
   
       10 . A centrifugal pump, comprising: 
 a housing having an inlet, an outlet, and an accommodation chamber;    an impeller disposed in the accommodation chamber;    a drive member fixed to one side of the housing and corresponding to the impeller for providing electromagnetic force required for rotation of the impeller; and    a shaft penetrating the center of the impeller and extending to the drive member, wherein the shaft comprises a spiral groove on the surface thereof.    
   
   
       11 . The centrifugal pump as claimed in  claim 10 , wherein the spiral direction of the spiral groove corresponds to the rotational direction of the impeller, such that air under the impeller moves upward along the spiral groove.  
   
   
       12 . The centrifugal pump as claimed in  claim 10 , wherein the impeller comprises a rotating portion and a plurality of blades formed on a surface of the rotating portion.  
   
   
       13 . The centrifugal pump as claimed in  claim 10 , wherein the inlet, outlet, and accommodation chamber are communicated with one another.  
   
   
       14 . The centrifugal pump as claimed in  claim 10 , wherein a gap exists between the housing and the impeller.  
   
   
       15 . The centrifugal pump as claimed in  claim 10 , wherein the housing further comprises a cover and an outer frame, the accommodation chamber is between the cover and the outer frame, the inlet and outlet are formed and extend in the cover.  
   
   
       16 . The centrifugal pump as claimed in  claim 15 , wherein the outer frame surrounds the drive member, preventing a fluid from entering the drive member.  
   
   
       17 . The centrifugal pump as claimed in  claim 15 , wherein the housing further comprises a base opposite to the cover, and the drive member is fixed to the base.  
   
   
       18 . The centrifugal pump as claimed in  claim 10 , wherein the impeller comprises a venthole axially penetrating the impeller.