KR20220142267A - Thruster and ship having the same - Google Patents

Abstract

According to the present invention, a thruster for a ship comprises: a propeller which generates propulsion of a ship; a body part in which the propeller is installed and provided at a front end of the fluid flow formed by the propeller; a strut rotatably connecting the body part to a hull of the ship; and at least one vortex fin provided on a portion of the body part to generate an accelerated vortex. The vortex fin has one end adjacent to the propeller installed higher than the other end spaced apart from the propeller to induce the vortex between the center of the propeller and the upper end of the propeller blade, thereby reducing the low-speed region of the fluid.

Description

A propulsion device for a ship and a ship including the same {THRUSTER AND SHIP HAVING THE SAME}

The present invention relates to a propulsion device for a ship and a ship including the same.

In general, a ship is equipped with a propulsion device including a propeller in the stern portion, the forward propulsion force is generated by the rotation of the propeller can be operated. In other words, when the propeller rotates, lift and drag are generated by the pressure difference generated before and after the propeller blades, and the resultant force of the lift and drag acts as thrust and torque of the propeller, so that the vessel can be operated.

On the other hand, a low-speed region in which the velocity of the fluid is lower than that of other regions may occur around the propulsion device for a vessel. Also, the velocity distribution of the fluid supplied to the propeller by the low velocity region may be non-uniform.

When a fluid having a non-uniform velocity distribution is supplied to the propeller, a locally larger load may be applied to the propeller as compared to a load applied to the propeller by supplying the liquid having a uniform velocity distribution to the propeller. Accordingly, the performance of the propeller may be deteriorated, and vibration and noise generated from the propeller may be caused.

The present invention was created to improve the prior art, and one object of the present invention is to provide a propulsion device for a ship having a vortex pin capable of reducing a low-speed region of a fluid, and a ship including the same.

A propulsion device for a ship according to an aspect of the present invention includes: a propeller for generating propulsion force of a ship; The propeller is installed, the body portion provided at the front end of the fluid flow formed by the propeller; a strut rotatably connecting the body portion to the hull of the vessel; and at least one vortex pin provided on a part of the body portion to generate an accelerated vortex, wherein one end adjacent to the propeller is installed higher than the other end spaced apart from the propeller, and the vortex is generated by the propeller. The low velocity region of the fluid can be reduced by guiding it between the center and the upper end of the propeller blade.

Specifically, the length of the vortex pin parallel to the longitudinal direction of the body part is 30% or less of the length of the body part, and the width of the center of the vortex pin perpendicular to the length direction of the body part is 50% or less of the length of the vortex pin can

Specifically, the other end of the vortex pin may have a shape that increases in width toward the one end of the vortex pin.

Specifically, the vortex pin may be provided on only one side of the left and right sides of the body part.

Specifically, the vortex pin may be provided symmetrically on each of the left and right sides of the body portion.

Specifically, the vortex pins are provided on the left and right sides of the body portion, respectively, the position in the body portion longitudinal direction of the vortex pins provided on the left side of the body portion and the body portion longitudinal direction of the vortex pins provided on the right side of the body portion The position in may be different.

A ship according to an aspect of the present invention may include the above-described propulsion device for a ship.

The propulsion device for a ship according to the present invention and a ship including the same can be provided with a vortex pin to reduce the low-speed region of the fluid. When the low-speed region of the fluid is reduced, it is possible to prevent deterioration of the propeller performance and reduce vibration and noise of the propeller.

1 is a view for explaining a ship according to an embodiment of the present invention.
FIG. 2 is a view for explaining the propulsion device for a ship shown in FIG. 1 .
3 to 6 are partial perspective views for explaining the propulsion apparatus for a ship shown in FIG.
7 is a view for explaining the behavior of a general propulsion device for a ship.
8 is a view for explaining the existence of a low-speed section of the fluid around the propulsion device for a ship shown in FIG. 7 .
9 is a view for explaining the behavior of the propulsion device for a ship according to an embodiment of the present invention.
10 is a view for explaining that the low-speed section of the fluid around the propulsion device for a ship shown in FIG. 9 is improved.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a ship is a tanker, LNG carrier, LPG carrier, container carrier, automobile carrier, bulk carrier that carries cargo such as a large amount of minerals, crude oil, natural gas, or thousands of containers in a cargo hold and sails the ocean. , but may be a large vessel such as a mineral carrier, but is not limited thereto, and may include all types of vessels and offshore structures of various types.

1 is a view for explaining a ship according to an embodiment of the present invention.

Referring to FIG. 1 , a ship 100 according to an embodiment of the present invention may include a hull 110 , a cabin 120 , and an engine casing 130 .

The hull 110 may be divided into a bow 111 , a central part 112 , and a stern 113 along the longitudinal direction.

An engine casing 130 may be mounted on the stern 113 of the hull 110 , and an engine room 114 may be provided inside the stern 113 . A propulsion engine 115 for propelling the hull 110 using fuel or the like may be provided in the engine room 114 .

A fuel supply line (not shown) for delivering fuel to the propulsion engine 115 may be provided in the central portion 112 of the hull 110 .

The cabin 120 is provided in the direction of the stern 113 of the hull 110 , and may be a space in which sailors working in the ship 100 live or a space to control the navigation of the hull 110 . In particular, the wheel house 121, which is the uppermost layer of the cabin 120, is a space for controlling the operation of the hull 110 and monitoring the operation status in an integrated manner. can be drawn The visible line indicates a boundary line that can be confirmed with the naked eye in the wheel house 121 that controls the navigation of the hull 110 , and the greater the downward slope of the visible line, the smaller the blind spot formed in the direction of the bow 111 may be.

The engine casing 130 is provided at the rear of the cabin 120 , and may discharge exhaust generated from the propulsion engine 115 and the like to the outside. To this end, a stack 131 may be provided in the engine casing 130 .

In addition, the stern 113 of the hull 110 may be provided with a propulsion device 200 for a ship that receives the power generated from the propulsion engine 115 to generate the propulsion force of the ship 100 . The propulsion device 200 for a ship may be rotatably connected to the hull 110 .

Meanwhile, in the present embodiment, it has been described as an example that the ship propulsion device 200 receives the power generated from the propulsion engine 115 to generate the propulsion force of the ship 100 , but may not be limited thereto. For example, when the propulsion engine 115 is omitted in the ship 100 , the ship propulsion device 200 may receive power generated from a separate generator to generate the propulsion force of the ship 100 .

FIG. 2 is a view for explaining the propulsion device for a ship shown in FIG. 1 , and FIGS. 3 to 6 are partial perspective views for explaining the propulsion device for a ship shown in FIG. 2 .

2 to 6 , the ship propulsion device 200 according to an embodiment of the present invention may include a propeller 210 , a body part 220 , a strut 230 , and a vortex pin 240 .

The propeller 210 is for propelling the vessel, and rotates by receiving power from the propulsion engine 115 , and may generate a driving force of the vessel 100 by rotation. The propeller 210 is located on the outside of the body 220, and may be connected to a rotation motor (not shown) to rotate.

The body 220 may provide a space in which the propeller 210 may be installed. The body 220 may have a rotation motor connected to the propeller 210 therein to transmit a driving force. In addition, the body 220 may have a shape extending parallel to the longitudinal direction of the ship.

One end of the strut 230 may be connected to the upper portion of the body 220 , and the other end may be connected to the hull 110 . In addition, the strut 230 may be rotatably supported with respect to the hull 110 . For example, the strut 230 may rotatably connect the body 220 to the hull 110 .

When the strut 230 rotates, the body 220 and the propeller 210 rotate together, and the direction of the driving force generated by the propeller 210 may be changed. When the direction of the driving force generated by the propeller 210 is changed, the course of the vessel 100 may be changed.

The vortex pins 240 can create accelerated vortices. The vortex pin 240 may be provided in a part of the body part 220 , for example, in the center of the body part 220 . The vortex pin 240 may be installed to be inclined with respect to the longitudinal direction of the body 220 . For example, the height of one end adjacent to the propeller 210 of the vortex pin 240 may be installed higher than the height of the other end spaced apart from the propeller of the vortex pin 240 . Accordingly, the vortex generated by the vortex pin 240 may enter the propeller 210 while ascending. In particular, the vortex generated by the vortex pin 240 may be induced between the center of the propeller 210 and the upper end of the propeller 210 blade.

The length of the vortex pin 240 parallel to the length direction of the body 220 may be 30% or less of the length of the body 220 . In addition, the width of the central portion of the vortex pin 240 perpendicular to the length direction of the body portion 220 may be 50% or less of the length parallel to the length direction of the body portion 220 of the vortex pin 240 . That is, the width of the central portion of the vortex pin 240 perpendicular to the length direction of the body portion 220 may be less than or equal to 15% of the length of the body portion 220 of the vortex pin 240 .

The other end of the vortex pin 240 may have a rounded shape in a direction toward the propeller 210 or a chamfered shape. That is, the other end of the vortex pin 240 may have a shape that increases in width toward one end of the vortex pin 240 . This is to prevent the vortex pin 240 from flowing due to fluid resistance. When the flow of the vortex pin 240 is prevented, it is possible to prevent the vortex pin 240 from being separated from the body 220 by the flow.

At least one vortex pin 240 may be provided on the body 220 . For example, as shown in FIG. 3 , the vortex pins 240 may be symmetrically provided on the left and right sides of the body 220 . As shown in FIG. 4 , the vortex pin 240 may be provided only on one side of the left and right sides of the body part 220 . As shown in FIG. 5 , a plurality of vortex pins 240 may be provided on both left and right sides of the body 220 . The vortex pins 240 on the left and right sides of the body 220 may be sequentially disposed in the longitudinal direction of the body 220 . As shown in FIG. 6 , the vortex pins 240 are provided on the left and right sides of the body part 220 , and the positions disposed on the left and right sides may be different. For example, the position in the longitudinal direction of the body portion 220 of the vortex pin 240 provided on the left side of the body portion 220 and the body portion 220 of the vortex pin 240 provided on the right side of the body portion 220 . The position in the longitudinal direction may be different.

7 is a view for explaining the behavior of a general propulsion device for a ship, Figure 8 is a view for explaining the existence of a low-speed section of the fluid around the propulsion device for a ship shown in Figure 7, Figure 9 is an embodiment of the present invention It is a view for explaining the behavior of a propulsion device for a ship according to an example, and FIG. 10 is a view for explaining that the low-speed section of the fluid around the propulsion device for a ship shown in FIG. 9 is improved. For convenience of explanation, the propeller is omitted in FIGS. 8 and 10, and a dark region indicates a relatively low fluid flow.

7 to 10 , it can be seen that the flow of the fluid is different depending on the presence or absence of the vortex pin 240 in the propulsion device 200 for a ship.

When the vessel 100 is sailing or the propeller 210 is operated, a low-speed region in which the velocity of the fluid is lower than that of other regions may occur around the propulsion device for a vessel that does not have a vortex pin. The performance of the propeller 210 may deteriorate due to the low-speed region of the fluid, and vibration and noise may occur in the propeller 210 . In particular, as shown in FIG. 7 , the low-speed fluid flows into the propeller 210 as it is, and as shown in FIG. 8 , the marine propulsion device 200 without the vortex pin 240 is a wide range of fluid It can be seen that a low-speed region of

On the other hand, the ship propulsion device 200 having the vortex pin 240 may form a vortex accelerated by the vortex pin 240 . In particular, as shown in FIG. 9 , the vortex fin 240 according to the embodiment of the present invention may form an accelerated vortex while ascending toward the propeller 210 .

The vortex formed by the vortex pin 240 may have a relatively high speed compared to the fluid in the low speed section. As shown in FIG. 10 , the vortex formed by the vortex pin 240 may reduce the low velocity region of the fluid.

As described above, the vortex formed by the vortex pin 240 enters the propeller 210 in an ascending form, thereby reducing the low-speed region of the fluid. When the low-speed region of the fluid is reduced, the non-uniformity of the velocity distribution of the fluid entering the propeller 210 is reduced, so that the load applied to the propeller 210 can be reduced.

Accordingly, deterioration of the performance of the propeller 210 may be prevented, and vibration and noise generated from the propeller 210 may be reduced.

In addition to the embodiments described above, the present invention may cover all embodiments generated by a combination of at least two or more of the above embodiments or a combination of at least one or more of the above embodiments and known techniques.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto. It will be clear that the transformation or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: ship
110: hull
120: cabin
130: engine casing
200: propulsion device for ships
210: propeller
220: body
230: strut
240: vortex pin

Claims (7)

propellers for generating propulsion for ships;
The propeller is installed, the body portion provided at the front end of the fluid flow formed by the propeller;
a strut rotatably connecting the body portion to the hull of the vessel; and
It is provided on a part of the body portion and includes at least one vortex pin for generating an accelerated vortex,
The vortex pin has one end adjacent to the propeller installed higher than the other end spaced apart from the propeller, and induces the vortex between the center of the propeller and the upper end of the propeller blade to reduce the low-speed region of the fluid. The method of claim 1,
The length of the vortex pin parallel to the longitudinal direction of the body portion is 30% or less of the length of the body portion,
The width of the central portion of the vortex pin perpendicular to the longitudinal direction of the body portion is 50% or less of the length of the vortex pin. 3. The method of claim 2,
The other end of the vortex pin is a propulsion device for a vessel having a shape that increases in the direction toward the one end of the vortex pin. 3. The method of claim 2,
The vortex pin is a propulsion device for a ship that is provided only on one side of the left and right sides of the body. 3. The method of claim 2,
The vortex pin is a propulsion device for a vessel that is provided symmetrically on each of the left and right sides of the body. 3. The method of claim 2,
The vortex pins are provided on the left and right sides of the body, respectively,
A position in the longitudinal direction of the body portion of the vortex pin provided on the left side of the body portion and a position in the longitudinal direction of the body portion of the vortex pin provided on the right side of the body portion are different from each other. A ship comprising the propulsion device for a ship according to any one of claims 1 to 6.

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