JPH0734793Y2 - Hydrofoil damping device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vibration control device for a hydrofoil ship that lifts the hull from the sea surface and travels by the lift generated on the hydrofoil during high-speed traveling.

[Prior Art] In recent years, as needs for speeding up various transportation means of land, sea and air have increased, passenger ship routes such as inland seas and remote islands have not been overlooked.
Aiming to improve service with emphasis on comfort and high speed, the model is equipped with a fully submerged hydrofoil, and high-pressure jets of seawater are jetted from the stern to lift the hull completely from the sea surface by the lift generated on the hydrofoil. A fully-introduced hydrofoil that runs at high speed has appeared.

This type of hydrofoil, called the canard type, is equipped with a hydrofoil for maintaining altitude at the front of the bottom of the ship and a hydrofoil for maintaining stability at the rear of the bottom of the ship. Like a general buoyancy type ship, the wing is flipped up and the bottom of the hull is submerged in the water to float on the surface of the sea for navigation (hereinafter referred to as boat running). It is a vessel that lifts the hull above the sea surface and runs (hereinafter referred to as wing run). When the hydrofoil ship enters the wing run state,
Only the struts that connect the hull to the hydrofoil penetrate the sea surface, allowing the hull to travel at ultra-high speed without being affected by the waves.Also, the computer-controlled automatic controller keeps the attitude of the hull constant. Since the sway is controlled, it has a feature that the hull does not sway in the waves and cause passengers to get seasick, unlike a general buoyancy type ship or a semi-submersible wing type hydrofoil ship. (For example, Japanese Patent Publication Sho 53-3
(Hydrofoam vessel referred to in Japanese Patent No. 7636) [Problems to be solved by the invention] As described above, a hydrofoil vessel is unlikely to be affected by waves and has little shaking when it is in a wing running state, unlike general buoyancy type vessels. However, when boats run or stop in a harbor or the like, they are affected by waves when the hull floats on the surface of the sea.

In particular, the hull of an ultra-high-speed hydrofoil equipped with a fully submerged hydrofoil is designed to be as lightweight as possible in consideration of the wing running state, and is normally used when the boat is running or is stopped (moored). The waves in the harbor tend to sway sensitively and easily cause sway, which may cause passengers to get seasick or give anxiety when passengers get on and off.

The present invention has been made in view of the above points, and in a state where the hull floats on the surface of the sea like a general buoyancy type ship, seawater is introduced from the bottom of the ship into the anti-swing water tank equipped in the ship to reduce the shaking. It is an object of the present invention to provide an anti-swing device for a hydrofoil ship, which automatically discharges seawater from the anti-swing water tank when entering the wing running state.

[Means for Solving the Problems]

The gist of the present invention for achieving the above-mentioned object is that a hydrofoil equipped with a fully submerged hydrofoil that lifts the hull from the sea surface by the lift generated by the hydrofoil during high-speed traveling In the ship, in the center of the hull, an anti-sway water tank, which is connected to the lower part of the water tank by a water passage, is installed close to the starboard,
An opening is provided at the bottom of the water passage of the anti-sway water tank so as to communicate with the water passage, and a valve lid that is selectively automatically opened and closed inward and outward by a pressure difference between the inside and outside of the opening is provided through an opening / closing control mechanism. There is a hydrofoil anti-swing device characterized by being installed.

[Action]

According to the vibration control device of the present invention having the above-mentioned configuration, when the hull moves from the wing running state to the boat running, the valve lid is opened toward the inside by the water pressure from the outside when the bottom of the ship sinks into the sea surface. Through this, seawater is introduced into the shaking water tank.

When the hull completely floats on the sea surface and the pressure difference between the inside and outside water on the valve lid is balanced, the valve lid is held in the closed position by the action of the opening / closing control mechanism to confine the seawater in the shaking water tank. It exerts a damping action against the motion of the hull by the movement.

Next, when the hull transitions from the running state to the wing run, the lift generated on the hydrofoil causes the bottom of the ship to float above the sea surface, causing the balance of the pressure difference between the inside and outside water on the valve lid to be lost, causing The seawater pressure (weight) is applied to the valve lid, and the valve lid is opened to the outside of the vessel and the seawater in the damping water tank is discharged through the opening. When the shaking water tank is emptied in this way, the valve lid is held in the closed position by the action of the opening / closing control mechanism, and the hull completely enters the wing running state.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of a hydrofoil ship to which the present invention is applied as seen from the bottom side of the ship, and FIG. 2 is a sectional view of the bottom opening.

In the figure, 1 is a hull of a hydrofoil, in which the central part of the front hydrofoil 2 is fixed to a strut 3 whose base is pivotally supported on the bottom 1a, and the base is attached to the bottom 1a at the rear of the bottom. The end of the rear hydrofoil 4 is fixed to the pair of left and right struts supported, and the central part of the wing is fixed to the central strut 6, and a water intake port (not shown) is provided forward on the lower end of the central strut 6. Propulsive force is obtained by taking in seawater from the water to the water jet pump of the propulsion device, and injecting this high pressure as a jet flow from the stern. At the time of wing running, each strut is set up and the front hydrofoil 2 and the rear hydrofoil are raised. When the boat is running, the struts are horizontal so that the front hydrofoil 2 is flipped to the stern side and the rear hydrofoil 4 is flipped to the stern side.

Reference numeral 7 denotes an anti-sway water tank installed in the center of the hull 1. The bottom part of the water tank 7a provided close to the left and right side ports is connected by a water passage 7b provided along the ship bottom 1a. 7, an opening 8 is provided in the bottom 1a of the ship, communicating with the water passage 7b, and a valve lid 9 is attached via an opening / closing control mechanism 10.

The valve lid 9 is opened outward with respect to the opening 8 and is opened inwardly with respect to the outer valve lid 9a that is tightly locked to the opening edge and the inner hole 8a of the outer valve lid 9a. The inner valve lid 9b is tightly locked to the hole edge portion, and the outer valve lid base portion is pivotally supported by the pin 11 at the opening edge portion, and the inner valve lid base portion is pivotally supported by the pin 12 at the middle hole edge portion. There is.

The opening / closing restricting mechanism 10 includes a support member 13 provided upright on the outer valve lid 9a inside the opening 8 at the tip edge portion of the valve lid 9, a support piece 13a of the support member 13, the opening edge portion, and the inner valve lid. 9b consists of a pair of springs 14 and 15 connected to each other,
Under the bias of both springs 14 and 15, the valve lid 9 is held in the closed position.

FIGS. 3 (a), (b), and (c) are diagrams for explaining the hydrofoil voyage, and FIGS. 4 (a), (b), and (c) are diagrams for explaining the operation of the opening / closing regulation mechanism.

FIG. 3 (a) shows immediately after the bottom of the ship hits the sea surface when transitioning from the wing-running state of the hull to the boat running.

In the wing running state, the inside of the rocking water tank 7 is empty and the valve lid 9 is held in the closed position by the opening / closing control mechanism 10. However, when the bottom of the ship lands on the sea surface, the water pressure applied to the valve lid 9 causes the valve lid 9 to move as shown in FIG. ), The inner valve lid 9b is opened inward against the spring 14, and the seawater flows into the shaking water tank 7 through the middle hole 8a.

FIG. 3 (b) shows a state where the hull is completely floating on the sea surface.

After the bottom of the ship hits the surface of the sea, a predetermined amount of water is collected and the hull completely floats on the surface of the sea. When the pressure difference between the inside and outside of the valve lid 9 is balanced, the seawater to the shaking water tank 7 The inflow is stopped, and the inner valve lid 9b that has been opened inward is returned to the closed position in water as shown in FIG. 4 (b) under the force of the spring 14 to close the valve lid 9. In this way, the seawater in the shaking water tank 7 moves in response to the shaking of the hull, and the shaking action is exerted.

FIG. 3 (c) shows a state where the hull is in the process of transitioning from the boat running state to the wing running state.

When the bottom of the boat floats out of the sea when the boat moves from the boat to the wing, water pressure (weight of seawater) from the inside of the rocking water tank 7 is applied to the valve lid 9 from the inside, as shown in FIG. ), The outer valve lid 9a is opened integrally with the inner valve lid 9b against the spring 15 and away from the opening edge toward the outside of the ship, and seawater is discharged through the opening 8. In this way, when the hull enters the wing-running state and seawater is completely discharged from the shaking water tank 7, the spring 15
The outer valve lid 9a is returned to the closed position shown in FIG. 4 (b) in the air (on the sea surface) under the urging of the valve lid 9 to close the valve lid 9.

In the above embodiment, the opening 8 is basically 1
Although the configuration in which the individual pieces are provided has been described, the number of openings may be plural in consideration of the capacity of the shaking water tank, the size of the openings, and the like.

Further, in order to make the anti-sway water action by the seawater introduced into the anti-sway water tank more effective, as shown in FIG. It is also possible to provide a pump device or the like that brakes the movement of the seawater in (1) or positively moves the seawater in the water tank in response to a signal from the automatic control device.

〔effect〕

As described above, according to the present invention, a hydrofoil ship is equipped with an anti-sway water tank, and when the hydrofoil boat floats on the sea surface when the boat is running or stopped in a harbor, etc. The seawater is introduced into the anti-sway tank to reduce the shaking by the movement of the seawater in the anti-sway tank, and the seawater in the anti-sway tank is automatically discharged when the hull is lifted from the surface of the sea to enter the wing run state. Therefore, when traveling at high speed, the purpose of reducing the weight of the hull as much as possible is satisfied, and passengers do not cause sea sickness or anxiety about passengers getting on and off when the boat is running or stopped. It is one that demonstrates the comfort of sailing.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a hydrofoil ship to which the present invention is applied, as seen from the bottom side, FIG. 2 is a cross-sectional view of the bottom opening, and FIGS. 3 (a), (b), and (c) are hydrofoils. Explanatory drawing of a ship, 4th
Drawings (a), (b), and (c) are operation explanatory views of an opening-and-closing regulation mechanism, and Drawing 5 is a perspective view seen from the lower part which abbreviated a part of rocking water tank showing other examples. . 1 ... Hull, 2 ... Front hydrofoil, 3 ... Struts, 4
...... Rear hydrofoil, 5 ...... struts, 6 ...... central struts, 7 ...... stable water tank, 8 ...... opening, 9 ...... valve lid, 10 ...
… Open / close control mechanism, 11 …… pin, 12 …… pin, 13 …… supporting member, 14,15 …… spring, 16 …… perforated plate.

Claims (1)

[Scope of utility model registration request] 1. In a hydrofoil ship equipped with a fully submerged hydrofoil, which lifts the hull from the surface of the sea by the lift generated in the hydrofoil during high-speed cruising, and runs close to the starboard side at the center of the hull. An anti-sway water tank that is connected by a water passage underneath the water tank is installed, and an opening is provided at the bottom of the water passage of the anti-sway water tank that communicates with the water passage, and an internal pressure difference An anti-swing device for a hydrofoil ship, characterized in that a valve lid that is selectively opened and closed by the inside and outside of the ship is installed via an opening / closing control mechanism.