JPH1029593A - Jet-water suction device for water jet-propulsive boat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently guide the water flow for driving the water jet of a water jet-propulsive boat to the jet-water suction port thereof and thus cause the water jet-propulsive boat to sufficiently bring out the performance thereof even in turning the water jet-propulsive boat. SOLUTION: A water jet-propulsive boat 1 is provided ahead of a jet-water suction port 7 with a turnable jet-water inflow plate 8 such that water easily flows into the jet-water suction port 7 communicating with a jet nozzle 5 of a jet propulsion device 2 corresponding to its steering. The jet-water inflow plate 8 provided turnably ahead of the jet-water suction port 7 is arranged to contact at its rear edges with both edges of the jet-water suction port 7 respectively, to thereby guide the water flow to the jet-water suction port 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water jet suction device for a water jet propulsion ship in the field of ships.

[0002]

2. Description of the Related Art In recent years, a watercraft propulsion device has been used in a race boat, a pleasure boat, or the like due to a demand for high speed.

[0003] However, in the conventional water jet propulsion boat 1, a suction duct 3 for suctioning the jet water of the propulsion device 2 is fixed to the boat bottom 4 as shown in Fig. 4, and the jet nozzle 5 is steered in a predetermined direction. Was driven.

[0004]

Therefore, the suction duct 3 always sucks in water only from a predetermined direction. In the case of a hydroplane type boat that skids, as shown in FIG. A large angle difference is generated between the water flow direction) and the suction duct 3, so that the water cannot be sufficiently sucked into the jet pump 6, and the water jet propulsion performance cannot be sufficiently exhibited.

Accordingly, the present applicant has developed a jet propulsion device which turns the injection water suction port in the water flow direction in response to the steering of the injection nozzle, and has achieved the required results. It was also desired to improve the jet propulsion device.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above-mentioned problems. In order to solve the above-mentioned problems, an injection nozzle of a jet propulsion device corresponding to steering of a water jet propulsion ship is provided. It is an object of the present invention to provide a water jet suction device for a water jet propulsion ship, wherein a water jet inflow plate is provided so as to be pivotable in front of the water injection port so that water can easily flow into the water injection port.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The water jet propulsion ship according to the present invention is provided with a jet water inflow plate so that water can easily flow into a jet water suction port of a jet propulsion device. In addition, water can sufficiently flow into the injection water suction port along the injection water inflow plate, so that a sufficient suction amount for generating thrust can be maintained.

Water jet propulsion boats such as race boats, pleasure boats, and industrial vessels are equipped with a water jet propulsion device at the rear of the bottom of the boat. Water energy at that time (thrust)
As a reaction force.

The water jet propulsion ship is of a hydroplane type. When the water jet propulsion device is steered in a cab, the injection nozzle can turn to a predetermined steering angle and is sufficient to generate thrust. A jet water inflow plate is pivotably attached to the jet water inlet so that the suction amount can be maintained.

The jet water inflow plate is symmetrical and streamlined so as to have low water resistance, and its front side is pivotally mounted on the center axis of the boat bottom so as to be able to turn left and right. At the same time, the rear side is in contact with both sides of the injection water suction port, so that water can be smoothly introduced into the injection water suction port.

The jet water inflow plate is rotatable as described above so as to abut on both sides of the jet water suction port to guide the water, and the steering angle of the jet nozzle is previously set so as to always face the water flow direction. , The direction of the side slip can be calculated, and the jet water inflow plate can be turned in accordance with the set link mechanism.

Further, the side slip angle of the water jet propulsion boat is detected by a gyro sensor or an acceleration sensor, and the slip side angle is calculated by the gyro sensor or the acceleration sensor. It can also be performed by an appropriate driving means.

In this manner, in response to the skidding of the water jet propulsion vessel, water can be flowed into the jet water inlet along the jet water inflow plate, so that a constant suction amount can always be obtained. The performance can be fully exhibited.

[0014]

1 to 3 show an embodiment of the present invention, which is applied to a race boat. The race boat of the water jet propulsion boat 1 has a boat bottom 4 as shown in FIG.
A water jet propulsion device 2 is attached to the rear part of the vehicle, and the injection nozzle 5 can be freely turned in a predetermined thrust direction by steering as shown in FIG.

The injection port 7 for injecting the water jet from the water jet curves downwardly and slightly protrudes below the boat bottom 4 as shown in FIG. 3, and has a streamlined jet water inflow as shown in FIG. The plate 8 is mounted on its pivot 9 at its front.
Then, the rear part of the jet water inflow plate 8 projects slightly into the jet water inlet port 7 so as to abut on both inner sides thereof, and even if the water jet propulsion boat 1 is slid as shown in FIG. The jet water inflow plate 8 turns so that water can flow into the jet water suction port 7 along the jet water inflow plate 8.

Therefore, the water jet propulsion ship 1
In FIG. 1, the water flows into the injection water inlet 7 along the central axis as shown in FIG. 1, and the injection water inflow plate 8 moves when the skid turns as shown in FIG. By turning, the water flows along the jet water inflow plate 8 into the jet water suction port 7, and a sufficient amount of jet water can be sucked in, so that the performance of water jet propulsion can be sufficiently exhibited.

It is preferable that the amount of protrusion of the jet water inflow plate 8 from the boat bottom 4 is substantially the same as the amount of protrusion of the jet water inlet 7 as shown in FIG.

The above-mentioned jet water inflow plate is provided with a guide groove of a predetermined link mechanism in a guide plate fixed to the boat body, and each of the water jet propulsion device integrated with the boat body, the jet water inflow plate, and the jet nozzle is provided. The support rod is pivotally connected and connected by a predetermined link mechanism, and the required cam curve is calculated from the steering angle of the injection nozzle to calculate the side slip direction so that the injection water inflow plate always faces the water outflow direction. be able to.
(The maximum turning angle can be as in the above embodiment.)

In the above embodiment, a race boat has been described, but a hydroplane type boat is preferred for a pledge boat as well as other industrial vessels, but the present invention can be applied to any boat. In particular, it is easy to modify the conventional type.

[0020]

As described above, according to the present invention, since the jet water inflow plate of the jet propulsion device of the water jet propulsion boat turns so that water can easily flow in, the water is sufficiently supplied to the jet water suction port. It is effective for a hydroplane type that can flow in, and in particular, causes the boat to skid when turning, and can also exert sufficient water jet propulsion performance by sucking in sufficient jetting water even when skidding.

Further, by the link mechanism and the electric control, the injection water inflow plate can be surely turned in accordance with the flow of water, and the performance of water jet propulsion can be enhanced as described above. .

[Brief description of the drawings]

FIG. 1 is a schematic bottom view of an embodiment of the present invention;

FIG. 2 is an explanatory view of a turning state of a jet water inflow plate of the water jet propulsion unit,

FIG. 3 is a side cross-sectional view of the jet water inflow plate portion,

FIG. 4 is an explanatory view of a conventional water jet propulsion unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Water jet propulsion ship 2 ... Water jet propulsion device 4 ... Ship bottom 5 ... Injection nozzle 7 ... Injection water inlet 8 ... Injection water inflow plate

Claims (4)

[Claims] 1. A jet water inflow plate is provided so as to be swivelable in front of a jet water suction port so that water can easily flow into a jet water suction port of a jet nozzle of a jet propulsion device in response to steering of a water jet propulsion ship. A water jet suction device for a water jet propulsion ship. 2. A jet water inflow plate is pivotably disposed in front of a jet water inlet of an injection nozzle of a jet propulsion device, and a rear portion thereof is in contact with both ends of the jet water inlet, respectively. The water jet suction device for a water jet propulsion ship according to claim 1, wherein the water jet is formed to flow into the water injection port. 3. A side slip direction is calculated and set in advance from the steering angle of the jet nozzle of the jet propulsion device so that the jet water inflow plate turns in a direction in which water easily flows, and the jet water inflow plate is set in the side slip direction. 2. The water jet suction device for a water jet propulsion ship according to claim 1, wherein the device is turned at the turning angle calculated by: 4. The jet water inflow plate is pivotally mounted on the jet propulsion device, and the jet nozzle of the jet propulsion device and the jet water inflow plate are connected by a predetermined link mechanism.
A water jet suction device for a water jet propulsion ship as described in (1).