PROPULSION APPARATUS FOR SHIP AND SHIP HAVING THE SAME

摘要

PURPOSE: A propulsion device and a ship with the same are provided to transfer power to a front propeller without using an outer shaft and to reversely rotate two propellers. CONSTITUTION: A propulsion device for a ship comprises a driving shaft(10), a rear propeller(20), a front propeller(30), sealing devices(90,110), and a support ring(60). The driving shaft has a lubricant feeding passage(120) inside thereof. The rear propeller is fixed on a driving shaft. The front propeller is rotatably installed in the driving shaft in front of the rear propeller. The sealing devices seal a gap between a front propeller hub(31) and a rear propeller hub(21). The support ring is installed in the driving shaft between the front and rear propellers to transfer the thrust of the front propeller to the rear propeller.