JPH0211487A - hydrofoil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial use! l'F] The present invention relates to a hydrofoil boat with an improved structure for generating lift.

[Prior Art] In general, a hydrofoil boat has a structure in which one or more hydrofoils are mounted under the bottom of the boat, and the hydrofoils obtain lift to propel the boat afloat.

In particular, in order to suppress the movement of the hull, there is also known a system in which flaps are attached to the hydrofoils and the attitude of the hull is controlled by operating the flaps.

[Problems to be Solved by the Invention] However, in such a hydrofoil ship, when the attitude of the ship changes due to pitching, the angle of attack of the hydrofoil changes and the lift changes, making it difficult to control the attitude of the ship. The problem is that it is difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a hydrofoil boat that, unlike a hydrofoil, can easily control the attitude of the hull and provide stable navigation.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a horizontal cylindrical body that rotates and generates lift under the bottom of the ship.

[Function] As shown in FIG. 2, when the hydrofoil boat is propelled while rotating the cylindrical body, a lift force is generated in the cylindrical body due to the Magnus effect, which tends to make the hull float.

This lift force always occurs in a direction perpendicular to the fluid flow, and the magnitude of the lift force is determined by the speed of the flow (the speed of the hydrofoil) and the rotational speed of the cylindrical body, so even if the attitude of the ship changes, Unlike hydrofoils, the direction and magnitude of lift force do not change, making it easy to control the attitude of the ship.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings.

In Figures 1 and 2, 1 is the hull of a hydrofoil, and below the bottom 2 is a cylindrical body 3 that rotates underwater to generate lift.
is provided horizontally via a support arm 4. In this embodiment, the cylindrical bodies 3 are arranged at the front and rear of the hull 1, and the attitude of the hull 1 can be arbitrarily adjusted by appropriately changing the rotational speed of the front and rear cylindrical bodies 3. Specifically, a pair of support arms 4 are suspended and fixed at the front and rear of the ship's bottom 2, and between the lower ends of the left and right support arms 4, the shaft centers of both ends of the cylindrical body 3 rotate through bearings (not shown). 0 freely supported
The cylindrical body 3 integrally has end plates 5 at both ends thereof, each having a diameter slightly larger than the diameter thereof, to prevent the cylindrical body 3 from sliding sideways. In order to rotationally drive the cylindrical body 3, a rotary drive device 6 consisting of a motor, a speed reducer, etc. is provided inside the hull 1, and a rotary drive device 6 is provided inside at least one support arm 4 formed hollow. The lower end of the guided rotating shaft 7 is connected to the shaft end of the cylindrical body 3 via a bevel 8.9. By rotating counterclockwise as shown by the arrow, the fluid flow R in the hull 1 is caused by the Magnus effect.
It is designed to generate a lifting force F that causes the robot to levitate in a direction perpendicular to the vehicle.

Next, the operation of the embodiment will be described.

As shown in FIG. 2, when the hydrofoil boat is propelled while rotating the cylindrical body 3, a lift force F is generated in the cylindrical body 3 to make the hull 1 float due to the Magnus effect.

This lift force F always occurs in a direction perpendicular to the fluid flow R, and the magnitude of the lift force is determined by the flow speed (velocity of the hydrofoil) and the rotational speed of the cylindrical body 3, so the attitude of the hull 1 changes. Even if a hydrofoil The lift is not changed by changing the angle of attack, but by changing the rotational speed of the cylindrical body 3, resulting in very good responsiveness.

In particular, by appropriately changing the rotational speed of the cylindrical bodies 3 disposed at the front and rear of the hull 1, the attitude of the hull 1 can be adjusted as desired.

The diameter, length, rotation speed, and material of the cylindrical body 3 are the same as the hull 1.
determined according to the size and speed of the Further, the surface of the cylindrical body 3 may remain smooth, but may be provided with a large number of small spherical dimples, etc., as necessary.

In the above embodiment, the cylindrical body 3 is placed at the front and rear under the bottom of the ship, but as shown in the third section 1, the cylindrical body 3 is placed at the front side under the bottom of the nO, and a fixed or variable type underwater mlo may be arranged, or these may be arranged in reverse.

[Effects of the Invention] In short, according to the present invention, since a cylindrical body that rotates underwater and generates lift by the Magnus effect is provided horizontally under the bottom of the ship, it is easier to control the attitude of the ship than with hydrofoils, and it is easier to navigate. Improves stability and comfort.

[Brief explanation of the drawing]

FIG. 1 is a front view of a hydrofoil boat showing one embodiment of the invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a side view of another embodiment of the invention. In the figure, 2 is the bottom of the ship, and 3 is a cylindrical body.

Claims (1)

[Claims] 1. A hydrofoil boat characterized by having a horizontal cylindrical body that rotates and generates lift under the bottom of the ship.