JPH0679917B2 - Levitation altitude holding device for a fully submerged hydrofoil - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a device for keeping a flying height of a fully submerged hydrofoil ship constant by a simple mechanical mechanism.

[Prior art]

The fully submersible hydrofoil is provided with ship legs extending downwards in front of and behind the hull, and the hydrofoil provided at the lower end of the hull allows the hull to float above the water surface. At least one of the hydrofoils provided on the front and rear (usually the hydrofoils on the front leg side) is pivotally supported up and down, and this is operated by the steering handle to either neutral, ascending or descending rudder. While adjusting the flying height of the hull.

However, since skillful operation of the flying height by the above-mentioned steering wheel is required, a device that can automatically operate the hydrofoil to a constant flying height is desired. Generally, in the case of a large ship, an electronic control device is adopted as such a flying height adjustment device, but this electronic control device is expensive and requires specialized maintenance, so it is suitable for an inexpensive small ship. There is a demand for a simple mechanical control device that can be installed at a lower cost.

[Object of the Invention]

An object of the present invention is to provide a flying height maintaining device for a fully submerged hydrofoil ship capable of automatically holding the hull at a constant flying height by a simple mechanical mechanism.

[Structure of Invention]

The present invention to achieve the above object, in a fully submersible hydrofoil ship, in which a hull extends below the hull, and a hydrofoil that floats the hull above the water surface is provided in the lower part of the hull, in the middle part of the hull. It is characterized in that a water-sliding body which can swing up and down is pivotally supported, and the water-sliding body and the hydrofoil are connected by a link mechanism so as to swing up and down in mutually opposite directions.

〔Example〕

FIGS. 1 and 2 show a small fully submerged hydrofoil ship to which the floating height maintaining device of the present invention is applied. In these figures, reference numeral 1 is a hull, and ship legs 2, 3 extending downward in the front and rear thereof.
Are provided, and hydrofoils 4 and 5 are attached to their lower ends, respectively. Of the front and rear hulls, the rear hull 3 is rotatable left and right around a vertical axis, and the hydrofoil 5 is fixed to the hull 3. Further, a propulsion device 6 and a rudder 7 are provided on the ship leg 3.

On the other hand, the front ship leg 2 is fixed to the hull 1, and a hydrofoil 4 is pivotally supported via a shaft 9 on a bracket 8 fixed to the lower end thereof so as to be vertically swingable. The hydrofoil 4 has its front end connected to the lower end of the steering handle 14 via links 10 and 11 and a rod 13. The steering handle 14 is swingable back and forth via a shaft 16 on a bracket 15 fixed to the hull 1, and when it is tilted to the front side f, the hydrofoil 4 is lowered in the D direction via the rod 13 and the links 11 and 10. When the rudder is turned to the rudder and is tilted to the rear side r, the hydrofoil 4 is turned to the rudder in the U direction.

A water surface sliding body 17 that vertically swings following the water surface W is pivotally supported by a shaft 18 at an intermediate portion of the pier 2. A link 12 is connected to the front end of the hydrofoil 4 via links 11 and 10 in the middle of the water surface sliding body 17 via a pin 19 that slides along an arcuate groove 20. Has been done.
By connecting such a link mechanism, the above-mentioned water slide 17
The hydrofoil 4 and the hydrofoil 4 are vertically swingable in opposite directions.

By being connected to the hydrofoil 4 as described above, the water surface sliding body 17 can act so as to always keep the flying height H from the water surface W of the hull 1 constant.

That is, when the water slide 17 is in a substantially neutral state on the water surface and the flying height H of the hull 1 is at a predetermined constant height, the hydrofoil 4 also becomes horizontal as shown in FIG. ,
When the hull 1 rises from this state and the flying height H increases, the water surface sliding body 1 follows the water surface W and sways in the direction of arrow d (downward), thereby pushing down the link 12 and thus the hydrofoil 4 to the arrow D. Swing in the direction (upward) to lower. That is, since the state shown in FIG. 4 is obtained, the hull 1 is lowered by this lowering rudder, and is returned to the original predetermined flying height H again.

On the contrary, when the hull 1 sinks from the neutral state and the flying height H decreases, the water surface sliding body 14 follows the water surface W and swings in the arrow u direction (upward), thereby pulling up the link 12. Therefore, the hydrofoil 4 is swung in the direction of the arrow U (downward) to raise the rudder. That is, since the state shown in FIG. 5 is reached, the hull 1 is raised by this raising rudder and returned to the original predetermined flying height H again.

Therefore, the water-sliding body always acts to automatically keep the hull at a predetermined flying height H. Moreover, it can be achieved by an extremely simple mechanical mechanism in combination with a link mechanism without using an expensive electronic control device.

In addition, in the said Example, although the case of the small submersible hydrofoil was illustrated, it is needless to say that this invention is applicable also to a medium-sized or large submersible hydrofoil.

Further, in the embodiment, the interlocking operation by the water surface sliding body is performed only on the hydrofoil of the front leg, but it may be interlocked with the hydrofoil of the rear leg. Further, in the case of a medium-sized or large-sized ship having three or more piers, the hydrofoil of the middle pier may be operated.

〔The invention's effect〕

As described above, the present invention pivotally supports the water-sliding body that is vertically swingable in the middle part of the hull of a fully submerged hydrofoil, and the water-sliding body and the hydrofoil at the bottom of the hull are mutually connected. Since the link mechanism is connected so as to swing up and down in the opposite direction, when the floating height of the hull changes and the water surface position changes, the water surface sliding body is swung to follow this water surface, which causes the hydrofoil to move. The hull may be swung in a direction to restore the flying height. Therefore, the present invention can automatically maintain the hull at a constant flying height while using a simple mechanical mechanism.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a front side ship leg of a small-sized submersible hydrofoil having a flying height maintaining device according to the present invention, and FIG. 2 is a side view of the same submersible hydrofoil. FIGS. 3 to 5 are explanatory views of the operation of the flying height maintaining device, and FIG.
FIG. 4 shows the state when the steering wheel is lowered, and FIG. 5 shows the state when the steering wheel is raised. 1 ... Hull, 2 ... Ship legs, 4 ... Hydrofoil, 10, 11, 12 ...
… Link (link mechanism), 13… Rod, 14… Steering handle, 17… Water slide, 9,18… Axis, W… Water surface,
H: Ascent height.

Claims (2)

[Claims] 1. A fully submerged hydrofoil ship having a hull extending below the hull and a hydrofoil for raising the hull above the water surface at the lower part of the hull, swinging up and down in the middle of the hull. A floating height of a fully submerged hydrofoil ship characterized by pivotally supporting a free surface gliding body and connecting the water surface gliding body and the hydrofoil with a link mechanism so as to vertically swing in opposite directions. Holding device. 2. The flying height maintenance device for a fully submerged hydrofoil ship according to claim 1, wherein the hydrofoil that is interlocked with the surface gliding body is simultaneously connected to the steering handle by a link mechanism.