Patent ID: 8192240
Filing Date: 2012-06-05
Classification: B63H,Y02T

Abstract:
1. A contra-rotating propeller system installed between a rudder horn of a ship and shaft support at an engine-output side, the system comprising: a propeller shaft rotatably supported by the rudder horn and the shaft support, respectively; a front propeller fixed to the propeller shaft; a counter rotating gear set installed on the rudder horn and connected with the propeller shaft; and a rear propeller connected to the counter rotating gear set via the propeller shaft penetrating an axis of the rear propeller and disposed between the rudder horn and the front propeller, wherein each of the rudder horn, a hub of the rear propeller, and a hub of the front propeller is designed to have substantially ellipsoidal body in shape together, wherein the counter rotating gear set rotates the rear propeller in a reverse direction to a rotating direction of the front propeller, wherein the counter rotating gear set includes epicyclic gear set, in which the epicyclic gear set has: wherein the planet gear carrier is fixed to the gear housing, and wherein a first sealing unit is provided on an inner circumference in the other side of the hub of the rear propeller.