Centrifugal propulsion apparatus and ship having same

Abstract

A centrifugal propulsion apparatus capable of forward and backward movement, and a ship having the same, the apparatus includes two impellers which are rotated by a power shaft, face each other, and are capable of jetting a fluid in opposite directions; and a power transmission unit provided between the power shaft and the two impellers so as to connect one impeller between the two impellers and the power shaft or connect the other impeller and the power shaft according to a rotational direction of the power shaft.

1 . A centrifugal propulsion apparatus comprising:
 two impellers, which are rotated by a power shaft, face each other, and are configured to jet a fluid in opposite directions; and   a power transmission unit provided between the power shaft and two impellers to connect the power shaft to one or the other of the two impellers, according to a rotational direction of the power shaft.   
     
     
         2 . The centrifugal propulsion apparatus of  claim 1 , wherein each of the two impellers comprises:
 a reflection shade having both ends opened and an increasing width from one end to the other end; and   a plurality of blades provided in the reflection shade, disposed in radial directions from a rotational central axis and having increasing width perpendicular to the rotational central axis with increasing width of the reflection shade.   
     
     
         3 . The centrifugal propulsion apparatus of  claim 2 , wherein the reflection shade is coupled to the plurality of blades. 
     
     
         4 . The centrifugal propulsion apparatus of  claim 2 , wherein one of the two impellers further comprises a streamlined induction layer that surrounds the rotational central axis and has gradually increasing width with increasing width of the reflection shade. 
     
     
         5 . The centrifugal propulsion apparatus of  claim 1 , wherein the two impellers use the power shaft as a rotation center. 
     
     
         6 . The centrifugal propulsion apparatus of  claim 1 , wherein the power transmission unit comprises two ratchet gears that connect the power shaft and each of the two impellers, and
 the two ratchet gears are engaged when rotating in opposite directions.   
     
     
         7 . The centrifugal propulsion apparatus of  claim 6  wherein one of the two ratchet gears comprises:
 a ratchet frame coupled to the power shaft and having a latch installed therein; and 
 a gear coupled to the impeller and making a pair with the ratchet frame. 
 
     
     
         8 . The centrifugal propulsion apparatus of  claim 1 , further comprising a diaphragm that is fixable to a ship, provided between the two impellers, and being parallel to the power shaft. 
     
     
         9 . The centrifugal propulsion apparatus of  claim 8 , further comprising a fixing unit installed at the fixed diaphragm and selectively fixing the two impellers to the fixed diaphragm. 
     
     
         10 . The centrifugal propulsion apparatus of  claim 8 , wherein the fixing unit comprises:
 a brake plate installed at the fixed diaphragm, contacting an adjacent impeller of the two impellers and preventing rotation of the adjacent impeller; and   a brake shaft rotatably coupling the brake plate to the fixed diaphragm.   
     
     
         11 . The centrifugal propulsion apparatus of  claim 8 , further comprising a bearing unit provided between the fixed diaphragm and the power shaft. 
     
     
         12 . The centrifugal propulsion apparatus of  claim 1 , further comprising two nozzles disposed adjacent to each other outside of the two impellers, connected to the two impellers and having widths increasing with increasing distance from the two impellers. 
     
     
         13 . A ship comprising:
 a body;   an engine installed in the body;   a centrifugal propulsion apparatus of  claim 1  installed in the body; and   a power shaft connecting the engine and the centrifugal propulsion apparatus.   
     
     
         14 . The ship of  claim 13 , further comprising an installation plate rotatably installed in the body and having the centrifugal propulsion apparatus installed therein. 
     
     
         15 . The ship of  claim 13 , wherein the power shaft comprises a portion coupled to the engine, a portion coupled to the centrifugal propulsion apparatus, and a portion passing through the body and connecting the two portions, and the three portions are configured to fit one another by insertion and be separated from one another.