Ship

Abstract

To provide a ship capable of suppressing a load applied to a hull when the ship docks.SOLUTION: A worker transport ship 100 comprises an engine 1 as a propulsion power source, a reduction gear 3 to decelerate the speed of the engines 1, a propeller shaft 4 connected to the reduction gear 3, and a propeller 5 attached to the propeller shaft 4. The worker transport ship 100 moreover comprises a block 6 that is arranged on the forward side of a hull 10 and supports the reduction gear 3, and a fender 7 attached to the block 6 and protruding forward from the forward end of the hull 10. The ship is configured to be docked alongside by pressing the fender 7 against a pair of mooring posts.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a marine vessel. [Background technology]

[0002] 2. Description of the Related Art Ships capable of navigating on water have been known in the past (see, for example, Patent Document 1).

[0003] The vessel in Patent Document 1 includes an engine as a propulsion power source, a reduction gear that reduces the rotation speed of the engine, a propeller shaft connected to the reduction gear, and a propeller attached to the propeller shaft. The vessel is configured to navigate by rotating the propeller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-222272 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned vessel, a base for supporting the reduction gear is provided, and a fender is provided at the front end of the hull, and the fender may be pressed against the mooring facility to come alongside the vessel. In this case, the propeller thrust acts on the base, which may result in a load being applied to the hull between the base and the fender.

[0006] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a ship that is capable of suppressing loads on the hull when coming alongside a ship. [Means for solving the problem]

[0007] The ship according to the present invention includes an engine as a propulsion power source, a reduction gear that reduces the rotation speed of the engine, a propeller shaft connected to the reduction gear, and a propeller attached to the propeller shaft. The ship further includes a base disposed on the front side of the hull and supporting the reduction gear, and a fender attached to the base and protruding forward from the front end of the hull, and is configured to be moored by pressing the fender against the docking facility.

[0008] By configuring in this manner, when the fender is pressed against the mooring facility, the thrust of the propeller can be made to act on the fender via the base.

[0009] In the above-mentioned watercraft, the reduction gear may be disposed forward of the engine and at a front end of the hull.

[0010] In this case, the vehicle may further include a transmission shaft connected to the engine and the reduction gear, the transmission shaft being arranged to extend in the fore-and-aft direction, and the propeller shaft being arranged to be inclined with respect to the fore-and-aft direction.

[0011] In the above-mentioned ship, the docking facilities may have a pair of docking posts extending vertically, and the fenders may be formed so as to extend in the width direction of the hull. Effect of the Invention

[0012] According to the ship of the present invention, it is possible to suppress the load applied to the hull when coming alongside the ship. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a plan view showing a schematic diagram of a worker transport ship according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic side view for explaining the worker transport ship of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, one embodiment of the present invention will be described.

[0015] First, a personnel transport vessel 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0016] As shown in Fig. 1, a crew transfer vessel (CTV) 100 is configured to transport workers to an offshore wind power generation facility 200. The crew transfer vessel 100 is, for example, a catamaran, and a fender 7 is provided at the forward end (the end on the X1 direction side) of the hull 10. The crew transfer vessel 100 is an example of the "ship" of the present invention.

[0017] The offshore wind power generation facility 200 includes a wind turbine tower (not shown), a monopile (not shown), and a transition piece 210 that connects the monopile and the wind turbine tower. The transition piece 210 is cylindrical and formed to extend in the vertical direction (Z direction). A ship docking facility 220 is provided on the outer circumferential surface of the transition piece 210.

[0018] The docking facility 220 is disposed on the sea surface and configured to enable the worker transport ship 100 to dock. The docking facility 220 has a pair of docking posts 221 and a ladder (not shown). The pair of docking posts 221 are disposed at a predetermined interval in the Y direction and are formed to extend in the vertical direction. Each docking post 221 is supported by a support member 221a extending from the outer circumferential surface of the transition piece 210 in the X2 direction. The ladder is formed to extend in the vertical direction and is disposed in the space S. That is, the ladder is disposed between the outer circumferential surface of the transition piece 210 and the pair of docking posts 221.

[0019] With the worker transport ship 100 moored to a pair of mooring posts 221, workers can use a ladder to move between the worker transport ship 100 and the offshore wind power facility 200.

[0020] As shown in Fig. 2, the worker transport ship 100 includes an engine 1, a transmission shaft 2, a reduction gear 3, a propeller shaft 4, a propeller 5, a base 6, and a fender 7. The worker transport ship 100 is configured to navigate by rotating the propeller 5. The worker transport ship 100 is also configured to be moored by pressing the fender 7 against a pair of mooring posts 221 (see Fig. 1).

[0021] The engine 1 is a propulsion power source (main engine) of the worker transport ship 100, and is provided to rotate a propeller 5. The output of the engine 1 is transmitted to a reduction gear 3 via a transmission shaft 2. That is, one end of the transmission shaft 2 is connected to the engine 1, and the other end is connected to the reduction gear 3. The reduction gear 3 is provided to reduce the rotation speed (revolutions per unit time) of the engine 1, and is connected to one end of a propeller shaft 4. For this reason, the reduction gear 3 is configured to reduce the rotation of the transmission shaft 2 and output it to the propeller shaft 4. The propeller 5 is attached to the other end of the propeller shaft 4, and the propeller 5 is disposed below the rear end side of the hull 10.

[0022] The reduction gear 3 is disposed forward (X1 direction side) of the engine 1. The reduction gear 3 is of a so-called V-drive type, and is configured so that the axis of the transmission shaft 2 and the axis of the propeller shaft 4 form an acute angle when viewed from the side. Specifically, the transmission shaft 2 and the propeller shaft 4 are connected to the rear side (X2 direction side) of the reduction gear 3, and the propeller shaft 4 is disposed below the transmission shaft 2. The transmission shaft 2 is provided to extend in the fore-and-aft direction (X1 and X2 directions), and the propeller shaft 4 is provided to be inclined with respect to the fore-and-aft direction. The propeller shaft 4 is inclined so as to be positioned higher as it moves forward. The propeller shaft 4 is disposed over most of the fore-and-aft direction of the hull 10.

[0023] The base 6 is disposed on the front side (X1 direction side) of the hull 10 and attached to the hull 10. The engine 1 and the reduction gear 3 are placed on the base 6, and the base 6 is configured to support the engine 1 and the reduction gear 3. For this reason, the reduction gear 3 is disposed at the front end part of the hull 10. The base 6 is fixed to the hull 10, and the engine 1 and the reduction gear 3 are fixed to the base 6.

[0024] Here, a fender 7 is attached to the front end of the base 6. The fender 7 is formed to extend in the width direction (Y direction) of the hull 10, and is provided so as to protrude forward from the front end of the hull 10. The fender 7 is elastically deformable, and has the function of protecting the hull 10 and absorbing impacts when coming alongside the ship. A reducer 3 is disposed near the fender 7, and another reducer 3 is disposed aft of the fender 7.

[0025] When the worker transport ship 100 is docked at the docking facility 220 (see FIG. 1 ), the worker transport ship 100 proceeds toward the docking facility 220, and the fenders 7 are pressed against the pair of mooring posts 221. For this reason, the fenders 7 are elastically deformed so that the pair of mooring posts 221 bite into the fenders 7. That is, the fenders 7 are elastically deformed so as to grip the pair of mooring posts 221. This makes it difficult for the fenders 7 to slip against the pair of mooring posts 221, and the worker transport ship 100 is docked alongside the pair of mooring posts 221. That is, the thrust of the propeller 5 is used to dock the worker transport ship 100 alongside the pair of mooring posts 221.

[0026] -effect- In this embodiment, as described above, the base 6 supporting the reduction gear 3 is provided, and the fenders 7 are attached to the base 6, so that when the fenders 7 are pressed against the pair of mooring posts 221, the thrust of the propeller 5 acts on the fenders 7 via the base 6, thereby suppressing the load on the hull 10. Therefore, the reinforcement of the hull 10 can be minimized, so that the weight of the worker transport ship 100 and the construction costs of the worker transport ship 100 can be suppressed.

[0027] In addition, in this embodiment, since the reduction gear 3 is disposed at the front end of the hull 10 and is disposed near the fender 7, it is possible to prevent the base 6 from becoming large. In addition, since the inclination of the propeller shaft 4 is gentle, it is possible to reduce loss of thrust from the propeller 5.

[0028] -Other embodiments- It should be noted that the embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present invention is not interpreted solely by the above-described embodiments, but is defined by the claims. The technical scope of the present invention includes all modifications within the scope and meaning equivalent to the claims.

[0029] For example, in the above embodiment, an example was shown in which the present invention is applied to the personnel transport ship 100, but the present invention is not limited to this, and may be applied to ships other than personnel transport ships.

[0030] In addition, in the above embodiment, an example is shown in which the present invention is applied to a worker transport ship 100 that is moored alongside an offshore wind power generation facility 200, but the present invention is not limited to this, and may also be applied to a worker transport ship that is moored alongside something other than an offshore wind power generation facility.

[0031] In addition, in the above embodiment, an example was shown in which the offshore wind power generation facility was of the monopile type, but this is not limited thereto, and the offshore wind power generation facility may be of a fixed-bottom type other than the monopile type, or the offshore wind power generation facility may be of a floating type.

[0032] Further, in the above embodiment, an example has been shown in which the reduction gear 3 is disposed on the front side with respect to the engine 1, but the present invention is not limited to this, and the reduction gear may be disposed on the rear side with respect to the engine.

[0033] In addition, in the above embodiment, an example was shown in which the engine 1 and the reducer 3 are supported by the base 6, but this is not limited to the above, and a base supporting the engine and a base supporting the reducer may be provided separately.

[0034] In addition, in the above embodiment, an example has been shown in which the fender 7 is elastically deformed when pressed against a pair of mooring posts 221, but this is not limiting, and the fender may be designed not to be elastically deformed when pressed against a pair of mooring posts.

[0035] Further, in the above embodiment, an example was shown in which the reducer 3 is of the V drive type, but the present invention is not limited to this, and the reducer may be of a type other than the V drive type.

[0036] In the above embodiment, the engine 1 may be a diesel engine or the like.

[0037] The above-described modified examples may be appropriately combined or rearranged. [Industrial Applicability]

[0038] INDUSTRIAL APPLICABILITY The present invention can be used in a ship that is configured to be moored by pressing a fender against a mooring facility. [Explanation of symbols]

[0039] 1 Engine 2 Transmission shaft 3 Reducer 4 Propeller shaft 5 Propeller 6 board 7 Fender 10. Hull 100 Worker transport vessel (vessel) 220 Arrival Equipment 221 Column for joining

Claims

1. An engine as a propulsion power source; A reducer that reduces the rotation speed of the engine; A propeller shaft connected to the reduction gear; A ship comprising: a propeller attached to the propeller shaft, A base is disposed on the front side of the hull and supports the reduction gear; A fender attached to the base and protruding forward from a forward end of the hull, A ship characterized in that it is configured to be moored by pressing the fender against mooring equipment.

2. 2. The vessel according to claim 1, The reduction gear is disposed forward of the engine and at a front end of the hull.

3. 3. The vessel according to claim 2, a transmission shaft connected to the engine and the reduction gear, The transmission shaft is provided to extend in a front-rear direction, A ship characterized in that the propeller shaft is arranged so as to be inclined with respect to the fore-and-aft direction.

4. In the ship according to any one of claims 1 to 3, The docking facility has a pair of docking posts extending vertically, A ship characterized in that the fender is formed so as to extend in the width direction of the hull.

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