JP3064078B2 - Marine water jet introduction type steering cylinder device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet-introduced steering cylinder apparatus for a marine vessel in which a hull can be advanced, neutrally held, and moved backward by a steering cylinder into which a water jet is introduced.

[0002]

2. Description of the Related Art In recent years, the speed of ships has been increased, and a hydrofoil ship that lifts a ship above the water surface by the lift of a wing protruding below the bottom of the ship, or that jets high-speed air from around the bottom of the ship. Air-cushion ships, such as hovercraft, that run by floating the hull above the surface of the water by reaction force are also being put into practical use as passenger ships.

[0003] Water jet propulsion ships also belong to these high-speed boats, and pump seawater pressurized by 25 to 40 m.
At a speed of 秒 from the water jet jet nozzle (diffuser) installed on the stern, and the reaction force is used as propulsion.

[0004] A conventional water jet propulsion boat steering device (a marine water jet introduction type steering cylinder device) is installed behind the jet nozzle, and the hull is turned using a hydraulic cylinder or the like. This is done by moving the jet water left and right to change the direction of the jet water. The hull is moved backward by a mechanism that jets the jet water toward the bow (forward).

Conventionally, a mechanism for reversing the hull is shown in FIG. 2. When the hull moves backward, the bucket 11 is lowered from above the steering cylinder 2 while blocking the jet flow, so that the lower part of the rear of the steering cylinder 2 The flow of the water jet is guided to a commutation port 12 having a certain length that is fixed and connected.

[0006]

By the way, in the conventional marine water jet-introduced steering cylinder device as described above, the bucket 11 as a reverse mechanism is lowered while interrupting the jet flow. Turbulence, making it extremely difficult to maintain the neutral state of the ship (a state in which the ship does not move forward or reverse).

In addition, since the commutation port 12 provided at the lower portion has a certain length, the wall of the commutation port 12 scratches the sea surface during sailing, which is a resistance to sailing. There are also problems. Accordingly, Japanese Patent Application Laid-Open No. 2-162192 discloses
Flaps at the rear of the steering cylinder,
Raise the flap obliquely so that the jet is directed downward
At the same time, the converted jet is
Some have been developed to guide you forward with a bar,
When the drive mechanism of the movable louver becomes extremely complicated
There is a problem. The present invention seeks to solve such a problem, by forming a bottom opening provided with a plurality of commutation plates at the bottom of the steering cylinder, and forming an operating shaft at the bottom rear end of the steering cylinder. Provide a flap that can rotate as the center ,
In particular the Rukoto provided to improve the shape of the commutation plate, easy
An object of the present invention is to provide a marine water jet-introduced steering cylinder device having a simple structure and capable of performing stable forward / reverse switching control with low running resistance.

[0008]

In order to achieve the above object, a marine water jet-introduced steering cylinder device according to the present invention is provided behind a propulsion water jet ejection nozzle provided at the stern. It has a steering cylinder that can be installed to introduce a water jet and can be controlled to turn left and right.A horizontal operating shaft that is controlled by a hydraulic device in the horizontal direction is provided near the bottom rear end of the steering cylinder. A plurality of commutation plates capable of commutating the flow of the water jet forward are provided in a steering cylinder bottom opening formed between the operating shaft and the vicinity of the bottom front end of the steering cylinder. A flap capable of closing a flow path formed between the commutation plates in a substantially horizontal falling state and closing a rear opening of the steering cylinder in an inclined standing state is attached to the operating shaft. In which, the commutation plate, flow introduction of
Curved in an arc toward the rear so that the part bends forward
It has a curved shape and is lower than the lower surface of the steering cylinder bottom opening.
It is characterized by being provided so as not to protrude downward .

[0009]

In the marine water jet-introduced steering cylinder device of the present invention, when the hull is switched from the forward state to the reverse, the operating shaft with the flap attached is gradually rotated by the hydraulic device, and the jet water is discharged by the flap. An action is performed in which the jet is orderly divided while being operated so as to sequentially scrape, and the jet is turned from the horizontal direction to the vertical downward direction without causing turbulence.

[0010] The plurality of commutation plates provided at the bottom of the steering cylinder further regulates the jet water directed downward in the vertical direction, and discharges the jet water in the bow direction (forward).

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a marine water jet-introduced steering cylinder device according to an embodiment of the present invention.

As shown in FIG. 1, in this embodiment, a steering cylinder 2 is arranged behind a propulsion water jet ejection nozzle 1 provided at the stern so that a water jet from the ejection nozzle can be introduced. Have been. The steering cylinder 2 can be moved left and right by a turning mechanism 7 driven by a hydraulic cylinder (not shown), thereby controlling the turning of the boat.

A horizontal operating shaft 4, which is rotationally controlled by a hydraulic device 3, is provided in the vicinity of the bottom rear end of the steering cylinder 2 in the horizontal direction. A plurality of curved commutation plates 6 capable of diverting the flow of a vertically downward water jet, which will be described later, forward, are provided in the bottom opening of the steering cylinder 2 formed between the bottom opening.
It is provided so as not to protrude further downward .

A single flap 5 is mounted on the operating shaft 4, and the flap 5 can close a flow path formed between the commutation plates 6 in a horizontal laid state. Steering cylinder 2 in an upright position inclined approximately 45 ° from the horizontal direction
It is formed so that the rear opening can be closed.

With such a configuration, the following effects can be obtained in the marine water jet-introduced steering cylinder apparatus of the present embodiment.

That is, when the vehicle is moving in reverse, the operating shaft 4 is controlled to rotate about 45 ° to form an inclined surface of the flap 5, thereby closing the rear opening of the steering cylinder 2 and the nozzle 1.
The direction of the emerging jet can be turned substantially vertically downward. (State in FIG. 1) At this time, the flap 5 performs the function of cutting off the jet water while gradually rising and separating the jet water, so that the flow is smoothly distributed without causing disturbance in the jet flow. be able to. And
The jet turned vertically downward by the flap 5 is shown in the figure.
The commutation plate 6 , which is curved in an arc toward the rear so as to bend the flow introduction portion forward as in the case of FIG .
It is rectified efficiently and is ejected forward. Therefore, the hull retreats properly .

In order to divide the water jet from the nozzle 1 almost halfway between the rear and the front so as to maintain the hull in a neutral state in which the hull does not move forward or backward, the flap 5 is provided with the rear end opening of the steering cylinder 2. Is controlled so as to be located at an intermediate position between a standing position for closing the flow path and a horizontal position for closing the flow path between the commutation plates 6.

On the other hand, during normal forward propulsion, the flap 5 is lowered horizontally on the bottom surface, and the jet in the direction of the arrow is jetted backward as it is. At that time, the commutation plate 6
Is installed so that it does not protrude below the bottom opening of the steering cylinder 2.
When propelled forward, even in a fixed state
It does not affect resistance.

As described above, the turning mechanism 7 and the flap 5 enable forward, neutral holding, reverse and turning maneuvers, and an effect that the neutral state can be stably held can be obtained. Further, since there is no protrusion in the steering cylinder 2 such as a conventional commutation port (see reference numeral 12 in FIG. 2), there is also an advantage that the running resistance is reduced.

[0020]

As described above in detail, according to the marine water jet-introduced steering cylinder apparatus of the present invention, a mechanism in which the flap mounted on the operating shaft near the bottom rear end gradually rises from the bottom surface of the steering cylinder. Because the jet of the water jet works to assist the movement of the flap, the jet flow is not disturbed, and it is possible to smoothly change the direction as if the jet is scraped off by the flap In addition, the effect of maintaining the neutral state stably can be obtained.

Also, the flow introduction part is bent forward.
The commutation plate , which has a shape that curves in an arc shape toward the rear, and is attached to the opening at the bottom of the steering cylinder ,
Since the diverted jet is appropriately guided toward the bow direction (forward), the hull can be efficiently moved backward, and the commutation plate projects downward from the bottom opening of the steering cylinder.
Because it is provided so that it does not come out,
Also prevents the ship from scratching the sea surface during forward cruising and increasing cruising resistance , and also simplifies the structure.
Are, bovine contribute to a reduction in cost Runado Ru significant advantages are obtained <br/>.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a marine water jet-introduced steering cylinder device as one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a conventional marine water jet-introduced steering cylinder device.

[Explanation of symbols]

 Reference Signs List 1 water jet ejection nozzle for propulsion 2 steering cylinder 3 hydraulic device 4 operating shaft 5 flap 6 commutation plate 7 turning mechanism

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Shuhiro Ude 2-1-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Works, Mitsubishi Heavy Industries, Ltd. (72) Inventor Hiroshi Kawada 2-chome, Araimachi, Takarai City, Hyogo No. 1-1 Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor ▲ Takashi Tomonari 2-1-1 Niihama, Araimachi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Ryoichi Oimatsu Nagasaki City, Inventor 1-1, Akunouramachi Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (56) References JP-A-2-162192 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B63H 11/107

Claims (1)

(57) [Claims] 1. A steering cylinder arranged behind a propulsion water jet ejection nozzle provided at the stern so as to be able to introduce a water jet from the ejection nozzle and capable of turning control to the left and right. A horizontal operating shaft that is rotationally controlled by a hydraulic device is provided in the lateral direction near the bottom rear end of the cylinder, and a steering cylinder bottom opening formed between the operating shaft and near the bottom front end of the steering cylinder. In addition, a plurality of commutation plates capable of commutating the flow of the water jet forward is provided, and a flow path formed between these commutation plates can be closed in a substantially horizontal falling state, and can be inclined. A flap capable of closing the rear opening of the steering cylinder in the standing state is mounted on the operating shaft, and the commutation plate is
But in the rearward direction to bend the flow inlet forward.
The steering cylinder has a shape that curves in a circular
A marine water jet-introduced steering cylinder device provided so as not to protrude below the lower surface of the mouth .