Diffuser-type endplate propeller

Abstract

A diffuser-type endplate propeller for driving a hull is provided. The diffuser-type endplate propeller includes a propeller hub and a plurality of blades. The propeller hub is connected to a transmission shaft of the hull. Each of blades respectively has a blade-body and an endplate connected to each other, wherein each of the blade-bodies is connected to the propeller hub and extends outward from the propeller hub to the corresponding endplate, each the endplate bends from the corresponding blade-body to extend towards a stern of the hull, each of the endplates has a leading edge and a trailing edge, each the leading edge keeps a first distance from an axis of the propeller hub, each the trailing edge keeps a second distance from the axis of the propeller hub, and the first distance is less than the second distance.

What is claimed is: 
     
         1 . A diffuser-type endplate propeller, configured to drive a hull and comprising:
 a propeller hub, connected to a transmission shaft of the hull; and   a plurality of blades, respectively having a blade-body and an endplate connected to each other, wherein each of the blade-bodies is connected to the propeller hub and extends outward from the propeller hub to each the endplate, each the endplate bends from the corresponding blade-body to extend towards a stern of the hull, each of the endplates has a leading edge and an trailing edge, the leading edge keeps a first distance from an axis of the propeller hub, the trailing edge keeps a second distance from the axis of the propeller hub, and the first distance is less than the second distance.   
     
     
         2 . The diffuser-type endplate propeller according to  claim 1 , configured to drive the hull for proceeding towards a sailing direction, wherein the axis of the propeller hub is not parallel to the sailing direction. 
     
     
         3 . The diffuser-type endplate propeller according to  claim 1 , wherein the blades are disposed and radially arranged on the propeller hub. 
     
     
         4 . The diffuser-type endplate propeller according to  claim 1 , which is integrally molded. 
     
     
         5 . The diffuser-type endplate propeller according to  claim 1 , wherein when the diffuser-type endplate propeller rotates, the rotating tracks of the leading edges form a cylindrical surface, a negative angle of attack is present between each the endplate and the cylindrical surface formed by the leading edges. 
     
     
         6 . The diffuser-type endplate propeller according to  claim 5 , wherein the angle of attack is −1°.