Propulsion device for vessel and vessel having same

摘要

Disclosed herein is a propulsion apparatus for ships. The propulsion apparatus, which includes a front propeller and a rear propeller to rotate in opposite directions and provides propulsion power to propel a hull of a ship, includes a power unit to supply power to rotate the rear propeller, a main shaft to transfer the power supplied from the power unit to the rear propeller, a hollow shaft extending in a longitudinal direction of the main shaft to allow the main shaft to pass therethrough and coupled to the front propeller, a drive motor including a rotor coupled to an outer circumferential surface of the hollow shaft and a stator supported by the hull, the drive motor rotating the hollow shaft in a direction opposite to a direction of rotation of the main shaft, and an electricity supply unit to supply electricity to the drive motor.

主权项

1. A propulsion apparatus for ships including a front propeller and a rear propeller to rotate in opposite directions and adapted to provide propulsion power to propel a hull of a ship, the propulsion apparatus comprising:
a power unit to supply power to rotate the rear propeller; a main shaft to transfer the power supplied from the power unit to the rear propeller; a hollow shaft extending in a longitudinal direction of the main shaft to allow the main shaft to pass therethrough and coupled to the front propeller; a drive motor comprising a rotor coupled to an outer circumferential surface of the hollow shaft and a stator supported by the hull, the drive motor rotating the hollow shaft in a direction opposite to a direction of rotation of the main shaft; an electricity supply unit to supply electricity to the drive motor, wherein the drive motor is a superconducting motor, the rotor of the drive motor comprising:
a superconducting coil, anda cooling chamber to accommodate coolant to cool the superconducting coil; and a coolant supply unit to supply coolant to the cooling chamber, wherein the coolant supply unit comprises: a housing comprising a first housing allowing the main shaft to rotatably pass therethrough, and a second housing fixed to the hull and rotatably coupled to the first housing to define a coolant accommodation portion for accommodation of the coolant in conjunction with the first housing; and a connection line to connect the coolant accommodation portion and the cooling chamber to each other, the connection line being coupled to the first housing.