KR-20260063219-A - PROPULSION SYSTEM FOR SHIP

KR20260063219AKR 20260063219 AKR20260063219 AKR 20260063219AKR-20260063219-A

Abstract

A ship propulsion system according to an embodiment of the present invention comprises: a tail portion including a propeller and a propeller shaft; a sliding plate slidably installed in a connecting portion for connecting the tail portion and the hull portion; a rotating shaft connected to the tail portion to transmit rotational power to the tail portion and coupled to the sliding plate to move together with the sliding plate; and a steering gear configured to rotate the sliding plate and the rotating shaft, wherein the connecting portion includes an opening extending in a circumferential direction, and the sliding plate is installed in the connecting portion so as to slide in a circumferential direction while closing the opening.

Inventors

송진호
최찬규
임홍일
김연태

Assignees

에이치디한국조선해양 주식회사
에이치디현대중공업 주식회사
에이치디현대삼호 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (12)

Tail section including a propeller and a propeller shaft; A sliding plate slidably installed in a connecting portion for connecting the tail portion and the hull portion; A rotating shaft connected to the tail portion to transmit rotational power to the tail portion and fastened to the sliding plate to move together with the sliding plate; and It includes a steering gear configured to rotate the above sliding plate and the above rotation axis, and The above connecting part includes an opening extending in the circumferential direction, and The above sliding plate is installed in the connection portion so as to be slid in the circumferential direction while closing the opening, Ship propulsion system.
In paragraph 1, The above rotational shaft is installed by penetrating the above sliding plate, Ship propulsion system.
In paragraph 1, A constant velocity joint further comprising a constant velocity joint that transmits rotational power of the ship's main engine shaft to the tail section. Ship propulsion system.
In paragraph 3, The above-mentioned rotational shaft is connected to the above-mentioned constant velocity joint and the above-mentioned tail section, respectively. Ship propulsion system.
In paragraph 4, The rotational force of the steering gear is transmitted to the constant velocity joint to rotate the sliding plate and the rotation axis, configured to Ship propulsion system.
In paragraph 3, A gear coupling further comprising connecting the main engine shaft and the joint shaft of the constant velocity joint, Ship propulsion system.
In paragraph 1, A seal further comprising a connection portion and a sliding plate disposed between the connection portion and the sliding plate to prevent seawater inflow. Ship propulsion system.
In paragraph 1, A support member further comprising a support member that supports the sliding plate with respect to the connection portion so that the sliding plate can move smoothly. Ship propulsion system.
In paragraph 1, A seal further comprising a seal installed and coupled to the sliding plate and the rotating shaft to prevent seawater from flowing between the sliding plate and the rotating shaft. Ship propulsion system.
In paragraph 1, A seal further comprising a tail portion and a rotating shaft coupled thereto to prevent seawater from flowing between the tail portion and the rotating shaft. Ship propulsion system.
In paragraph 1, A first seal installed between the sliding plate and the rotating shaft to prevent seawater from flowing between the sliding plate and the rotating shaft; and It further includes a second seal installed between the tail portion and the rotating shaft to prevent seawater from flowing in between the tail portion and the rotating shaft, and The first seal and the second seal are integrated with each other to form a spherical seal. Ship propulsion system.
In Paragraph 11, One side of the above spherical seal is coupled to the sliding plate and the other side is coupled to the tail portion, Ship propulsion system.

Description

Ship Propulsion System The present invention relates to a rudderless ship propulsion system. A rudder is a device located at the rear of a ship's propeller and used to control the ship's direction of travel. Conventional ships generally have a propulsion system that includes a rudder. Since the rudder is installed at the rear of the propeller, cavitation occurs due to a decrease in fluid pressure on the rudder surface as fluid velocity increases, which can lead to rudder damage. Preventing this requires not only continuous maintenance but also increased construction and maintenance costs and labor requirements due to the use of special coatings. Additionally, a separate space must be secured solely for the installation of the rudder, which causes an increase in the length of the stern section, resulting in higher construction costs and a reduction in cargo hold volume. Furthermore, steering relies on utilizing a portion of the thrust generated by the propeller's rotation, which leads to a decrease in propulsion efficiency. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. FIG. 1 schematically illustrates a ship propulsion system according to an embodiment of the present invention. FIG. 2 is a drawing showing a structure for rotating the tail portion of a ship propulsion system according to an embodiment of the present invention. FIG. 3 is a perspective view showing the part connecting the hull and the tail of a ship propulsion system according to an embodiment of the present invention. Figure 4 is a cross-sectional view taken along line AA of Figure 3. Figure 5 is a cross-sectional view taken along the BB line of Figure 3. FIG. 6 illustrates a state in which the tail section has a steering angle of 0 degrees in a ship propulsion system according to an embodiment of the present invention. FIG. 7 illustrates a state in which the tail portion of a ship propulsion system according to an embodiment of the present invention rotates in the yaw direction, resulting in a steering angle of 15 degrees. FIG. 8 is a cross-sectional view of a spherical seal of a ship propulsion system according to an embodiment of the present invention. The embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, and the following embodiments may be modified in various different forms, and the scope of the invention is not limited to the following embodiments. Rather, these embodiments are provided to make the disclosure more faithful and complete and to fully convey the spirit of the invention to those skilled in the art. Preferred embodiments of the present invention are described in detail with reference to the attached drawings so that a person skilled in the art can easily practice the present invention. Referring to FIG. 1, the ship propulsion system (10) includes a constant velocity joint (13) that transmits rotational power of the main engine shaft (11) to the tail section (12). The constant velocity joint (13) may be, for example, a tripod joint, a ball joint, a universal joint, etc., but a tripod joint may be suitable for use in a ship. The main engine shaft (11) is a shaft that transmits power generated from the ship's engine. When the constant velocity joint (13) is a tripod joint, transmission of rotational power and compensation for axial displacement are possible. Rotation in the yaw direction of the tail section (12) is made possible by the angle of the constant velocity joint (13). The tail section (12) includes a propeller shaft (14) and a propeller (15) coupled to the propeller shaft (14). A gear coupling (16) is provided to prevent separation or eccentricity between the constant velocity joint (13) and the main engine shaft (11) when the tail section (12) rotates in the yaw direction. The gear coupling (16) is configured to transmit rotational force through gear coupling between a hub and a sleeve. As shown in FIG. 1, the gear coupling (16) may be provided on an axis connecting the constant velocity joint (13) and the main engine shaft (11). A thrust bearing (21) is provided to transmit the thrust generated from the propeller (15) to the main hinge (18, 19). The main hinge (18, 19) connects the rotary tail section (12) to the hull section (23) and acts to enable the yaw direction rotation of the tail section (12) by means of hinge action. A stern tube (25) that surrounds the propeller shaft (14) is provided, and the stern tube (25) functions to prevent seawater from entering the interior. The steering gear (27) transmits torque to rotate the rotary tail section (12). Due to the yaw rotational torque of the steering gear (27), the main hinges (18, 19) rotate, and as the rotation of the main hinges (18, 19) causes the angle of the constant velocity joint (13) to change