JPS6211274Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hydrofoil boat that is propelled by jetting out water taken in from the water.

In this type of hydrofoil boat, a water suction port is installed in a part that is constantly submerged in water, such as a hydrofoil support member, but floating objects may collide with the water suction port or be sucked in from the water suction port. There is a risk that
It is necessary to prevent this.

The purpose of this invention is to provide a hydrofoil that can prevent collisions with and suction of floating objects.

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 vertical draining plate is provided in the center of the front hydrofoil support member in the left-right direction and protrudes in front of the water suction port.

According to the hydrofoil of this invention, propulsive force can be obtained from the fluid that is sucked in from the water suction port and ejected backward from the water spout, and the drain plate prevents floating objects from colliding with the water suction port. It is possible to effectively prevent water from being sucked in through the suction port.

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 left and right support members 5 extending obliquely downward from the rear bottom of the ship.
Each of the support members 4 and 5 is hollow, and the horizontal cross section of the front wing support member 4 excluding the lower end and the majority of the rear wing support member 5 has a symmetric airfoil shape.

A forward-facing water suction port 6 is provided at the lower front end of the front wing support member 4, and a plurality of horizontal bars 7 are fixed to the suction port 6 at predetermined intervals vertically. A vertical drainage plate 8 is fixed between the left-right center portion of the front surface of the front wing support member 4 and the bottom of the ship, and the lower end of this plate 8 passes just in front of the suction port 6 and extends below it. 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 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 ejecting fluid such as water or air backwards along the upper surface of the wing, the flow velocity on the upper surface (back surface) of the wing becomes greater than the flow velocity on the lower surface (pressure surface) of the wing, thereby increasing circulation. Therefore, the lift force L generated on the wing increases. After shifting to the floating state, it is also possible to propel the hull 1 by mainly jetting water backward from the second spout 12. At this time, water is ejected from the first ejection port 11 by an amount that allows maintenance of the floating state and attitude control of the hull 1.

In the above-mentioned hydrofoil boat, floating objects are removed from the front wing support member 4 by the drain plate 8 provided on the front surface of the front wing support member 4.
And it is prevented from colliding with the suction port 6 or being sucked in from the suction port 6.

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 portion of the front wing support member 4, in which the rear end portions of a plurality of suction direction changing plates 27 located immediately in front of the suction port 6 are arranged at the front end of the lower end portion of the support member 4 in a vertical direction. It is mounted so that it can move freely. These boards 2
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 changed arbitrarily by a driving device such as a hydraulic cylinder. In addition, the lower end of the drain plate 8 is connected to the change plate 2.
7 and reaches below the suction port 6.
During surfacing navigation, the change plate 27 is changed as follows.
The attitude of the hull 1 is controlled by. That is,
When raising the bow part of the hull 1, the front part of the change plate 27 is directed upward. In this way, an upward force is applied to the change plate 27 itself due to the water flow, and since water is sucked in from above, an upward force is applied to the bow section as a reaction, and the bow section is raised. The hull 1 then assumes an upward attitude. Since the changing 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 as mentioned above, the upward force due to the reaction of water suction is added to this, so Rapid attitude control is possible. When lowering the bow, use change plate 2 in the opposite direction as above.
Turn the front part of 7 downward. Note that the attitude control of the hull 1 is performed using a gyroscope attached to the hull 1,
This is done automatically by detecting the position using an attitude sensor such as a stutter meter or wave height meter, and processing this information using a computer.

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 front view of the water inlet, and Fig. 4 is an enlarged view of the rear hydrofoil support member. 5 is an enlarged cross-sectional view of the rear hydrofoil, FIG. 6 is an enlarged cross-sectional view showing a modified example of the rear hydrofoil, and FIG. 7 is an enlarged cross-sectional view showing another modified example of the rear hydrofoil. FIG. 8 is an enlarged side view showing a modification of the lower end of the front hydrofoil support member. 4...Front hydrofoil support material, 6...Water inlet, 8
...Draining board, 11, 12...Water spout, 15...
Water jet pump, 17, 19...pipe line.

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 water jetting pump 15 is provided in the middle of the pipes 17 and 19, and a vertical drain plate 8 is provided in the center of the front hydrofoil support member 4 in the left-right direction and projects in front of the water suction port 6. A hydrofoil boat.