JP3434132B2 - Air leakage prevention side wall type air cushion boat - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side wall type air cushion boat in which an air cushion chamber for floating a hull is formed by both rigid side portions and a flexible bow seal and stern seal, and more particularly, the above air cushion chamber. The present invention relates to an air leakage prevention side wall type air cushion boat capable of preventing air leakage from a vehicle.

[0002]

2. Description of the Related Art FIG. 6 (side view), FIG. 7 (front view) and FIG. 8 (plan view) of a conventional side wall type air cushion boat.
There is an air cushion chamber 3 surrounded by the left and right side wall portions 1, 1 as a catamaran hull, a flexible bag-shaped bow seal 5 and a stern seal 5 '.

The upper part of both side wall parts 1, 1 is the deck 2
The air is supplied to the air cushion chamber 3 and to the bag-shaped bow seal 5 and the stern seal 5'by the lift fan 4 provided in the deck 2. Further, water intakes 7, 7 that open respectively on the rear lower surfaces of both side wall parts 1, 1 are provided, and a water jet propulsion device (not shown) that can suck seawater from the water intakes 7, 7 and eject it rearward is provided. Has been.

With the above-described structure, when the lift fan 4 operates, the air cushion chamber 3 causes the hull to float, and it becomes possible to navigate in a state where the hull resistance is small. At that time, as shown in FIG. The draft surface 6-2 in the air cushion chamber 3 is kept lower than the draft surface 6-1 on the outside.

[0005]

By the way, as described above, when the draft surface 6-2 in the air cushion chamber 3 becomes low,
When this side wall type air cushion boat travels in waves, there is a problem that air leakage a occurs as shown in FIG. The leaked air is then taken into the intake port 7 shown in FIG.
If it is sucked in, the efficiency of the water jet propulsion device will be reduced. Therefore, as shown in FIG. 11, it is conceivable to lower the internal pressure of the action chamber 3 to slightly raise the internal draft surface 6-2. However, in this way, the draft of the hull increases, and The hull resistance will increase.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide an air leakage preventing side wall type air cushion boat capable of preventing air leakage from the air cushion chamber as much as possible. And

Further, according to the present invention, by preventing the air leakage from the air cushion chamber as described above, the intake of air into the water jet propulsion device is suppressed and the performance of the device can be sufficiently maintained. An object of the present invention is to provide a side wall type air cushion boat that prevents air leakage.

[0008]

In order to solve the above-mentioned problems, an air leakage prevention side wall type air cushion boat of the present invention is surrounded by both side walls having rigidity and a flexible bow seal and stern seal. An air cushion chamber, the air cushion chamber being partitioned by a pair of vertical partition walls arranged along the inner side surfaces of the both side wall portions, and a central main air cushion chamber and left and right side portions. It is characterized in that it is divided into an air cushion chamber and a pressure control means for maintaining the internal pressure of the left and right side air cushion chambers lower than the internal pressure of the main air cushion chamber.

Further, the side wall type air cushion watercraft of the present invention is provided with water intakes on the lower surfaces of the both side wall portions, and a water jet propulsion device capable of sucking water from the water intakes and ejecting the water rearward. It is characterized by the provision of.

In the above-described side wall air cushion boat of the air leakage preventive type of the present invention, pressure control is performed so that the pressure in the side air cushion chamber is lower than the pressure in the main air cushion chamber. The draft surface in the cushion room is higher than the draft surface in the main air cushion room.

Therefore, the air overflowing from the main air cushion chamber during the navigation in waves is absorbed by the side air cushion chamber, and the leakage of air to the outside can be prevented.

Further, since the air leakage is prevented as described above, the leaked air is not sucked into the water intake opening on the lower surfaces of both side wall portions, and the water sucked from the water intake is used as the working water. The water jet propulsion device that operates is no longer adversely affected.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an air leakage prevention side wall type air cushion boat as a first embodiment of the present invention. 1 is a plan view thereof, FIG. 2 is a cross-sectional view thereof (cross-sectional view taken along the line II-II of FIG. 1), and FIG. 3 is a cross-sectional view showing its operating state.

As shown in FIGS. 1 and 2, an air cushion chamber 3 surrounded by both side walls 1 and 1 having rigidity as a catamaran hull, a flexible bag-shaped bow seal 5 and a stern seal 5'is formed. ,
Partitioned by a pair of vertical partition walls 8, 8 arranged along the inner side surfaces of both side wall parts 1, 1 to form a central main air cushion chamber 3'and left and right side action chambers 9, 9. Is divided into

The upper part of the side wall parts 1, 1 is the deck 2
The air is supplied to the air cushion chamber 3 and to the bag-shaped bow seal 5 and the stern seal 5'by the lift fan 4 provided in the deck 2.

Further, water intakes 7, 7 which are respectively opened at the rear lower surfaces of both side wall parts 1, 1 are provided, and water jet propulsion (not shown) capable of sucking seawater from the water intakes 7, 7 and ejecting the seawater rearward. A device is provided.

Furthermore, the left and right side air cushion chambers 9,
As pressure control means for keeping the internal pressure of 9 lower than the internal pressure of the main air cushion chamber 3 ′, pressure control valves 10, 10 are provided on the deck 2 so as to be connected to each side air cushion chamber 9. There is.

With the above-described structure, when the lift fan 4 operates, the hull floats due to the action of the air cushion chamber 3, and it becomes possible to navigate with a low hull resistance.

FIG. 2 shows a state in which the internal pressure of the main air cushion chamber 3'is equal to the internal pressure of each side air cushion chamber 9, but when navigating in waves, each side portion is controlled by the pressure control valve 10. Pressure control is performed so as to reduce the internal pressure of the air cushion chamber 9 to be lower than the internal pressure of the main air cushion chamber 3 '.

As a result, as shown in FIG. 3, the draft surface 6-3 in the side air cushion chamber 9 becomes higher than the draft surface 6-2 in the main air cushion chamber 3 '. Therefore, the air overflowing from the main air cushion chamber 3'during the navigation in waves will be absorbed by the side air cushion chamber 9,
The leakage of air to the outside will be prevented.

In addition, since the air leakage is prevented as described above, the water intake port 7 that opens to the lower surface of the side wall portions 1, 1 is formed.
The leaked air will not be sucked into the water jet propulsion device, and the water jet propulsion device using the water sucked from the water intake port 7 as the working water will not be adversely affected. It should be noted that, when the waves are severe, it is possible to fully open the pressure regulating valve 10 so that the pressure in the side air cushion chamber 9 becomes equal to the atmospheric pressure.
In this case, the draft surface 6-3 of the side action chamber 9 becomes the same level as the external draft surface 6-1.

FIG. 4 shows a second embodiment of the present invention. Figure 4
Reference numerals inside are the same as those in FIG. The vertical partition 8 does not necessarily have to be provided from the lower surface of the deck 2 as shown in FIG.
In the example shown in FIG. 4, the vertical partition wall 8 is attached to each inner wall surface of the side wall portions 1, 1. A pressure adjusting valve 10 for adjusting cushion pressure is connected to each side air cushion chamber 9 through an air passage 11.

FIG. 5 shows a third embodiment of the present invention. In this example, the side air cushion chamber 9 has both side wall portions 1,
It is provided inside 1. Also in the case of the above-mentioned second and third embodiments, it is possible to obtain the same operational effect as in the case of the above-mentioned first embodiment.

In the embodiment shown in FIGS. 1 to 3, in order to increase the pressure of the side air cushion chamber 9,
The pressure in the main air cushion chamber 3'may be increased by closing the pressure adjusting valve 10. At this time, air enters the side air cushion chamber 9 beyond the lower edge of the vertical partition wall 8 and the draft surface 6-3 in the side air cushion chamber 9 is lowered. Further, an air compression mechanism may be incorporated in the pressure adjusting valve 10, and pressure may be directly applied from this to send air into the side air cushion chamber 9.

Further, in the embodiment of FIGS. 1 to 3, the pressure adjusting valve 10 is a pressure reducing / pressurizing device so that the draft surface 6-3 in the side air cushion chamber 9 can be positively adjusted. Good.

[0026]

As described in detail above, according to the side wall type air cushion boat of the present invention, the internal pressure between the main air cushion chamber and both side walls is reduced in the side wall type air cushion boat. The controllable side air cushion chamber keeps the air inside the action chamber from leaking to the outside of both side walls while maintaining the function of levitating the hull and reducing the hull resistance while sailing in waves. Even if the water jet propulsion device is provided with a water intake port on the bottom of the ship, it is possible to prevent air from being sucked through the water intake port.

[Brief description of drawings]

FIG. 1 is a plan view of an air leakage prevention side wall type air cushion boat as a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a cross-sectional view showing an operating state of the air cushion boat of FIG.

FIG. 4 is a horizontal cross-sectional view of a hull showing an air leakage prevention side wall type air cushion boat as a second embodiment of the present invention.

FIG. 5 is a horizontal cross-sectional view of a hull showing an air leakage prevention side wall type air cushion boat as a third embodiment of the present invention.

FIG. 6 is a side view of a conventional side wall type air cushion boat.

FIG. 7 is a front view of the air cushion boat of FIG.

FIG. 8 is a plan view of the air cushion boat of FIG.

FIG. 9 is a cross-sectional view showing an operating state of a conventional side wall type air cushion boat.

FIG. 10 is a transverse cross-sectional view showing an air leak state of a conventional side wall type air cushion boat.

FIG. 11 is a transverse cross-sectional view showing another operation state of the conventional side wall type air cushion boat.

[Explanation of symbols]

1 Side wall as catamaran 2 decks 3 Air cushion room 3'Main air cushion room 4 lift fans 5 Bow seal 5'stern seal 6-1, 6-2, 6-3 Draft surface 7 water intake 8 vertical partition 9 Side Action Room 10 Pressure control valve as pressure control means 11 air holes

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60V 1/04 B60V 1/11 B60V 3/06

Claims (2)

(57) [Claims] 1. A side wall type air cushion boat having an air cushion chamber surrounded by rigid side walls and a flexible bow seal and a stern seal, wherein the air cushion chamber is formed in each of the side walls. It is partitioned by a pair of vertical partition walls arranged along the side surface to be divided into a central main air cushion chamber and left and right side air cushion chambers, and the inner pressures of the left and right side air cushion chambers are controlled. An air leakage prevention side wall type air cushion boat, characterized in that a pressure control means capable of maintaining a pressure lower than the internal pressure of the main air cushion chamber is provided. 2. An air leakage prevention type, characterized in that a water intake is provided on the lower surfaces of the both side wall parts, and a water jet propulsion device is provided which can suck water from the intake and eject the water rearward. Side wall type air cushion boat.