JPS6211275Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a hydrofoil.

A hydrofoil boat navigates by lifting the hull above the water surface using lift generated in the hydrofoils, and it is necessary to control the attitude of the hull while cruising.

The purpose of this invention is to provide a hydrofoil ship capable of rapid attitude control of the hull.

A hydrofoil boat based on this invention has a forward-facing water inlet at the lower end of the front hydrofoil support, a rearward-facing water outlet at the stern, and a pipe leading from the water inlet to the water outlet. A water jetting pump is provided in the middle of the path, and a suction direction changing plate that can be moved up and down is provided at the water suction port.

According to the hydrofoil of this invention, propulsive force can be obtained by the fluid sucked in from the water suction port and ejected backward from the water jet port, and as will be explained later, the angle of the suction direction changing plate can be changed. By changing the direction, the attitude of the ship can be quickly controlled by using the force acting upward or downward due to the water flow and the force acting in the same direction due to the reaction of water sucked in from above or below. can be done.

Embodiments of this invention will be described below with reference to the drawings.

The drawing shows a submersible hydrofoil. This ship is equipped with a horizontal front hydrofoil (front wing) 2 and a rear hydrofoil (rear wing) 3 under the hull 1, and the lower end of a support member 4 extending diagonally downward from the front bottom of the ship. The left and right center portion of the front wing 2 is fixed to the rear wing 2, and both left and right end surfaces of the rear wing 3 are fixed to the lower end portions of a pair of right and left supports 5 extending obliquely downward from the rear bottom of the ship.
Each of the supports 4 and 5 has a hollow shape, and the horizontal cross section of the front wing support 4 excluding the lower end and most of the rear wing support 5 has a symmetric airfoil shape.

A forward-facing water suction port 6 is provided at the front end of the lower end of the front wing support member 4, and the rear end portions of a plurality of suction direction changing plates 27 located immediately in front of the suction port 6 are attached to be vertically movable. ing. These plates 27
The front ends of the plates 27 are rotatably connected to each other by a connecting member 28, and although not shown, the angle of the plate 27 can be arbitrarily changed by a driving device such as a hydraulic cylinder. Further, a vertical draining plate 8 is fixed between the left-right center portion of the upper front surface of the front wing support member 4 and the bottom of the ship. 9 is a garbage net.

A tank 10 that communicates with the spaces in the left and right rear wing supports 5 is provided at the front part of the rear wing 3, and a first water spout 11 in the shape of a rearward slit that communicates with the tank 10 is connected to the upper surface of the rear wing 3. It is set in. Furthermore, a pair of rearward-facing second water spouts 12 on the left and right sides are provided at the stern end of the hull 1 . 13 is a rudder.

Two water jet pumps 15 driven by a turbine 14 are provided within the hull 1 .
The suction pipes 16 of the left and right pumps 15 merge into one and are connected to the upper end of the front wing support member 4, and the front wing support member 4 and the suction pipe 16 form a suction pipe line 17. The discharge pipe 18 of the left pump 15 is connected to the upper end of the left rear wing support member 5 and the second
The discharge pipe 18 of the right pump 15 is similarly connected to the upper end of the right rear wing support member 5 and the second jet port 12, and the discharge pipe 1
8 and the rear wing support member 5 form a discharge pipe 19 for each pump 15. Then, by operating the pump 15, the water sucked in from the suction port 6 is ejected backward from the first and second spout ports 11 and 12.
The hull 1 is propelled by the reaction force of this water. Also,
A switching valve 20 is provided at a branch part of each discharge pipe 18, and the discharge pipe 19 is switched so that water is spouted from both or only one of the first and second jet ports 11 and 12. Both spouts 11,
It is possible to adjust the amount of water that is simultaneously ejected from 12.

When the above hydrofoil is stopped, the hull 1
is floating on the water surface. When starting sailing, water is mainly spouted backwards from the first spout 11 along the upper surface of the rear wing 3, thereby causing the hull to
Promote. In this way, as will be explained next, a large lift force is generated in the rear wing 3, which lifts the hull 1, so that the hull 1 quickly shifts from a state floating on the water surface to a surface sailing state. . In other words, the lift force L generated on the wing placed in the water flow
is expressed as the following equation according to Kutsuta's theorem.

L=ρV "Here, ρ is the density, V is the flow velocity, and "is the circulation.By jetting a fluid such as water or air backward along the upper surface of the wing, the flow velocity on the upper surface (back surface) of the wing can be increased. The flow velocity becomes higher than the flow velocity on the lower surface (pressure surface) of the wing, and as a result, the circulation becomes larger, and the lift force L generated on the wing increases. It is also possible to propel the hull 1 by jetting water backward from the outlet 12. At this time, water can be jetted from the first spout 11 by an amount that allows the hull 1 to maintain its floating state and to control the attitude of the hull 1. In addition, during floating sailing, the attitude of the hull 1 is controlled by the changing plate 27 as follows.In other words, when raising the bow of the hull 1, the changing plate 27 is If you do this, an upward force will act on the change plate 27 itself due to the water flow, and since water will be sucked in from above, an upward force will act on the bow section as a reaction. , the bow part rises and the hull 1 assumes an upward attitude.Since the change plate 27 is located in the area where the water flow is fast just in front of the suction port 6, the upward force acting on it is large, and moreover, the above-mentioned As the upward force due to the reaction of water suction is added to this, rapid attitude control is possible.When lowering the bow, the front part of the change plate 27 is directed downward, contrary to the above. Attitude control of the hull 1 is performed using a gyroscope, a stutter meter, and a water gauge installed on the hull 1.
This is done automatically by detecting the position using an attitude sensor such as a wave height meter and processing this information using a computer.

In the above embodiment, the direction of water jetting from the first water jetting port 11 is constant, but the direction of water jetting from the rear wing is changed by flaps 21 and 22 as shown in FIG. 6 or 7. The amount of lift generated can be controlled. The flap 21 in FIG. 6 is plate-shaped, and its front end is connected to the first water spout 11.
It is attached to the front edge of the machine so that it can move up and down. The flap 22 in FIG. 7 includes a pair of curved plates 23 that are arranged to face each other and extend left and right, and a plurality of vertical plates 24 that are arranged at predetermined intervals in the left and right direction to connect these plates 23 to each other. It has a hollow shape and is fitted into a slit-shaped opening 25 on the upper surface of the rear wing 3 that communicates with the tank 10.
Both end portions are attached to the left and right rear wing support members 5 so as to be vertically movable. A slit-shaped water inlet 26 from the tank 10 is formed at the front end of the flap 22, and a slit-shaped first water spout 11 is formed at the rear end. Although not shown, the angles of these flaps 21 and 22, that is, the direction in which water is ejected, can be arbitrarily changed by a driving device such as a hydraulic cylinder.

FIG. 8 shows a modification of the lower end of the front wing support member 4, in which a drain plate 8 extends downward, and its lower end passes just in front of the change plate 27 and reaches below the suction port 6. . In this way, the drain plate 8 provided on the front surface of the front wing support 4 prevents floating objects from colliding with the front wing support 4 and the suction port 6 or being sucked in from the suction port 6. Ru.

The shape of the first water spout 11 is not limited to the slit shape. For example, a large number of circular water spouts may be provided. The second water spout 12 may be provided at any position other than the stern end, for example, at the rear end of the lower end of the rear wing support member 5. In addition, water jet pump 1
The number of 5 is arbitrary, and it is also possible to set it to 1.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway side view, Fig. 2 is a bottom view, Fig. 3 is an enlarged perspective view of the lower end of the front hydrofoil support, and Fig. 4 is a rear underwater view. FIG. 5 is an enlarged horizontal cross-sectional view of the wing support member, FIG. 5 is an enlarged cross-sectional view of the rear hydrofoil, FIG. 6 is an enlarged cross-sectional view showing a modification of the rear hydrofoil, and FIG. 7 is another modification of the rear hydrofoil. FIG. 8 is an enlarged cross-sectional view showing an example, and FIG. 8 is an enlarged side view showing a modification of the lower end portion of the front hydrofoil support member. 4...Front hydrofoil support material, 6...Water suction port, 1
1, 12...Water spout, 15...Water squirt pump, 17, 19...Pipe line, 27...Suction direction changing plate.

Claims (1)

[Scope of utility model registration request] A forward-facing water inlet 6 is provided at the lower end of the front hydrofoil support member 4, and rearward-facing water outlets 11, 12 are provided at the stern, leading from the water inlet 6 to the water outlets 11, 12. A hydrofoil boat in which a water jet pump 15 is provided in the middle of pipes 17 and 19, and a water suction port 6 is provided with a suction direction changing plate 27 that is movable up and down.