JPH04133895A - Device and method for water jet propulsion steering - Google Patents

Abstract

PURPOSE:To perform all maneuvering only through changing rotation angle of the jet changeover body in a jet changeover device by providing pumps to generate jet on the portside and the starbordside of the stern, and providing a jet changeover device to change the outflow direction of jet on the outlet part of each pump. CONSTITUTION:This water jet propulsion device is constituted out of pumps 2 to generate jet, jet changeover devices 8 to change the jet direction, and connecting pipes 9 to let flow the outflow jet so as to have speed component in the advancing direction of a boat. The jet changeover device 8 is provided with a jet changeover body 10 therein, and by rotating the jet changeover body 10 with a rotating mechanism 11, the flowing out direction of the outflow jet 5 can be changed. At maneuvering, for example when a hull 1 is a little turned left, the jet changeover body 10 of the jet changeover device 8 on the portside is rotated by a little angle, and when the hull 1 is quickly turned left, the rotation angle of the jet changeover body 10 of the jet changeover device 8 on the portside is made right angles, and jet 7 is jetted from the outlet of the connecting pipe 9 to obtain large turning moment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water injection propulsion device mounted on a ship and a method thereof.

(Prior art) As a ship equipped with a water injection propulsion device, for example,
There is something like the one shown in the figure. FIG. 9(A) is a plan view of the hull 1. Pumps 2 for generating a jet at the stern of the hull 1 are provided on the port and starboard sides, respectively, and a pump 2 is provided at the outlet of the pump 2 to control the horizontal direction of the jet. A steering tube 3 is provided. The vertical direction of the jet flow is controlled by the reversing cover 4.
It will be held in

FIG. 9(B) is a side view of the hull 1, showing the case where the outlet jet 5 is discharged to the sea surface 6 by the reversing cover 4, and the hull 1 is controlled in the direction of reversing. FIG. 10 is an enlarged plan view of the steering tube 3 portion, and FIG. 1 is an explanatory diagram showing the state of the outlet jet 5 when the jet 7 from the pump 2 is controlled by the reverse cover 4 and the steering tube 3. be.

FIG. 11(A) shows the case where the hull 1 is reversed, and the first
Figure 1 (B) shows the case where the hull 1 is made to go straight, and Figure 1 (C) shows the case where the ship body 1 is turned to the left by bending the steering tube 3. In order to turn or reverse the hull 1, the steering tube 3 is rotated around the vertical axis as shown in FIG. I was letting it happen. That is, turning or reversing the hull 1 is performed using two types of configurations, the steering tube 3 and the reversing cover 4, and two types of control systems for them, and the overall control is performed by unifying the entire structure. was.

(Problems to be Solved by the Invention) However, in such a conventional water injection propulsion and steering device, the control mechanism is complicated and the entire device is heavy and large.

Furthermore, when reversing, the jet is ejected diagonally downward and forward, so the lower part of the stern needs to be cut off diagonally so as not to obstruct the jet.

In other words, it is necessary to create a structure in which the reverse cover is positioned as far from the stern as possible so that the jet does not hit the stern, which complicates the hull structure. On the other hand, moving the reversing cover away from the stern increases the strength of the structure supporting the reversing cover accordingly, resulting in an increase in weight.

Furthermore, when the jet is injected diagonally downward during reversing, an upward thrust is applied. Generally, when a high-speed boat is operated, it lowers its water intake and ejects a jet stream into the air, so it is undesirable for a vertical thrust force to act on the boat. Therefore, when traveling in reverse, it is necessary to perform vertical position control using hydrofoils, lift fans, etc., and in such a case, control becomes complicated.

For example, when making a sharp left turn during high-speed cruising, the steering tube is first rotated to inject a jet diagonally rearward to the left. Furthermore, when the control handle is rotated to the left and the jet stream on the port side is reversed, an upward thrust is applied to the port stern of the ship. If the left stern rises during a sharp turn to the left, it will destabilize the ship, so control is required. Furthermore, if the vessel is reversed with the steering tube rotated, the direction of the reverse injection depends on the direction of the steering tube, so the turning moment of the vessel changes depending on the position of the steering tube, making control difficult. Therefore, it has been practically impossible to mount the conventional water injection propulsion device on small high-speed recreational boats.

[Structure of the Invention (Means for Solving the Problems) The present invention includes a pump provided on the port and starboard sides of the stern for generating a jet flow, and a pump provided at the outlet of the pump for switching the outflow direction of the jet flow. a jet flow switching device for the jet flow switching device; a connecting pipe provided in the jet flow switching device for discharging the jet flow from the pump so as to have a velocity component in the forward direction of the vessel;
A jet flow switching body that is built into the jet flow switching device and rotatably supported around one axis and changes the outflow direction of the jet according to the rotation angle of the jet flow switching device, and a jet flow switching body that is provided in the main body of the jet flow switching body. When the rotation angle is zero, there is a through opening provided so that the jet flow from the pump flows out as it is, and a through opening provided in one direction perpendicular to the through opening of the jet flow switching body, so that the rotation angle of the jet flow switching body is perpendicular to the through opening. In this case, it is characterized by having an opening for guiding the jet flow from the pump to the connecting pipe.

(Function) According to the present invention, the jet flow ejected from the pump can be made to travel straight, make small turns, and make sharp turns using the jet flow switching body that rotates around one axis. In other words, all maneuvers can be performed simply by changing the rotation angle of the jet flow switching body.

(Example) An example of the present invention will be described below. Figure 1 shows the case where the water injection propulsion and steering system of the present invention is mounted on the hull 1 and the hull 1 is moving straight. Figure 1 (A) is its plan view, and Figure 1 (B) is its FIG.

The water injection propulsion device of the present invention includes a pump 2 that generates a jet flow.
, a jet flow switching device M8 for switching the direction of the jet flow, and a connecting pipe 9 for causing the exit jet flow to flow out so that it has a velocity component in the forward direction of the vessel.

FIG. 2 is a detailed view of the jet flow switching device 8, and shows the case where the jet flow 7 from the pump 2 travels straight and is discharged. The jet flow switching device H8 incorporates a jet flow switching body 10, and the jet flow switching body 10 is provided with a through opening 10a and an opening Job. That is, the jet flow switching body 10 switches and changes the outflow direction of the jet flow 7 from the pump 2, and as shown in FIG. ]By rotating O,
The outflow direction of the outlet jet 5 is changed.

FIG. 3 is a side sectional view of the jet flow switching device shown in FIG. 2. 2 and 3 show the case where the rotation angle of the rotation mechanism 11 is zero, and in this case, the jet 7 from the pump 3 passes through the through opening 10a and directly flows into the outlet jet 5.
becomes. Further, the opening] and Ob are provided in one direction perpendicular to the through opening 10b, and in this state are connected to the connecting pipe 9.

Next, FIGS. 4 and 5 show the case where the hull is turned slightly to the left. When the hull 1 is to make a small turn to the left as shown in FIG. 4(A), the jet flow switching body 10 of the port side jet flow switching device 8 is rotated by a small angle, and the starboard jet flow switching device 8 is left as it is. . FIG. 5 shows the outflow state of the jet 7 from the port side jet switching device 8 in this case. When the jet switching body 10 is rotated a small amount, the jet 7
The small left rotation moment can be freely controlled within the range where it is not hindered by the fixed seal portion of the jet flow switching device 8. In this case, the jet stream 7 on the starboard side continues to travel straight, so the hull can make a small turn while maintaining high speed.

Further, FIGS. 6 and 7 show a case where the hull 1 is made to make a sharp turn to the left. Jet flow switching body 10 of jet flow switching device 8
When the rotation angle is set to a right angle (90°), the opening 10b is located at the outlet of the pump 2, one of the through openings 10a faces the side wall of the jet flow switching device 8, and the other is located at the inlet of the connecting pipe 9. Therefore, the jet 7 passes through the connecting pipe 9 and becomes the outlet jet 5. A nozzle is formed at the tip of the connecting pipe 9 so that the outlet jet 5 has a velocity component in the forward direction of the hull 1.

That is, when the jet flow switching body is rotated to a substantially right angle, the jet flow 7 flows from the outlet of the connecting pipe, so that a very large turning moment can be obtained. - Since the injection on the starboard side remains straight, it is possible to make sharp turns at high speed. Since the jet direction is made horizontal from the outlet of the connecting pipe 9, no vertical thrust force acts on the hull. Therefore, hull 1
can make sharp turns at high speed and stably. Further, if a mechanism is provided at the outlet of the connecting pipe 9 to raise and lower the direction of the jet flow, the thrust force in the vertical direction can be actively utilized, making it possible to turn the hull 1 in a more stable posture.

FIG. 8 shows a case where the hull 1 is reversed.

In this case, the jet 7 is injected simultaneously from the outlet of the connecting pipe 9 on both the port and starboard sides, thereby obtaining a reverse propulsion force for the hull.

Which of the turning moment of the hull 1 and the reverse propulsive force should be increased can be freely set by changing the direction and position of the outlet of the connecting pipe 9.

As described above, the steering and reversing of the hull 1 are performed by the rotating mechanism 11 rotatably supported around one axis, which rotates the jet switching body 10 of the jet switching device 8 to direct the outlet jet. 5 directions are controlled.

When the hull 1 is running straight ahead, as shown in FIG. 2, the jet flow 7 passes through the through-hole [Oa] of the jet flow switching body 10 without contacting the inner wall thereof.

Since the jet flow switching body 10a can be controlled only by rotation around one axis, its control is limited to controlling the angle of the jet flow switching body]Oa. Therefore, there is only one servo mechanism, and the control system is also simple. Since it can be simplified in this way and its weight can be reduced, it is ideal as a propulsion device for high-speed boats. That is, in order to reduce wave-forming resistance in high-speed boats, it is essential to lower the water intake, and for this purpose, it is very important to make the boat lighter.

Furthermore, since the jet flow switching body 10 is sealed, changing the angle of the jet flow switching body 10 has no effect on the air resistance during jet flow, and even if the jet flow switching body 10 is rotated during cruising. There is also no possibility that the jet flow switching body 10 will come into contact with the sea surface.

Further, when the hull 1 turns or moves backward, the jet 7 is injected through the completely sealed jet switching device 8 and the connecting pipe 9, so there is an advantage that all the water discharged from the pump 2 can be used. Further, since the connecting pipe 9 and the exit direction of the connecting pipe 9 can be freely determined, there is an advantage that the water jet propulsion device does not affect the hull shape at all, and the hull 1 can be designed to have the optimum shape as a boat.

In addition, there is no need to consider that the jet 7 will collide with the stern when going backwards, so there is no need to cut off the lower part of the stern diagonally, and the jet 5 can be moved away from the hull 1 so that the jet 5 hits the hull 1. There's no need to avoid it.

Furthermore, since the outlet of the connecting pipe 9 can be arbitrarily arranged as described above, it can also be arranged horizontally. That is, even when the jet stream 7 is ejected from the outlet of the connecting pipe 9, it is possible to completely eliminate any influence on the vertical thrust. In addition, the connecting pipe 9
By arranging a mechanism for changing the direction of the jet 7 at the outlet of the jet 7, it is possible to apply a vertical thrust force and use it positively. This makes it possible to move the left or right stern up and down during a sharp turn, making the hull 1 more stable.

Furthermore, when the jet flow switching body 10 is rotated a small amount, the hull 1 makes a small turn, and when the jet flow switching body 10 is rotated a large amount in the same direction, the hull 1 makes a sharp turn in the same direction, so the maneuverability of the hull is improves.

[Effects of the Invention] As described above, according to the present invention, not only the mechanism of the water injection propulsion and steering device can be simplified, but also the control system can be simplified, and the reliability of the equipment can be improved. It is also possible to reduce the weight of the device, which is very important.

Furthermore, since the jet flow is switched to the connecting pipe when reversing, the outlet jet flow can be placed at any position on the piping. For this reason, there is no need for the conventional shape in which the lower part of the stern is cut off diagonally.

Furthermore, by oriented the outlet of the connecting pipe horizontally, vertical thrust force does not act at all, so there is no problem with reversing one side and making sharp turns during high-speed cruising.

Furthermore, by making the direction of the nozzle at the outlet of the connecting pipe variable in the upward and downward directions, it is possible to control the vertical position of the left and right sterns, and it is possible to further increase the stability of the hull during sharp turns.

Further, the jet flow switching device 8 of the present invention has a sealed structure, so that there is no water leakage during all operations, and all of the jet flow can be used for operation.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a ship equipped with the water jet propulsion device of the present invention, FIG. 2 is a cross-sectional view of the jet flow switching device of the present invention, and FIG. 3 is a longitudinal cross-sectional view of the jet flow switching device of the present invention. Figure 4 is an explanatory diagram when the hull is turned to the left, Figure 5 is an explanatory diagram showing the jet flow state of the jet flow switching device when the hull is turned to the left, and Figure 6 is an explanatory diagram when the hull is turned sharply to the left. Figure 7 is an explanatory diagram showing the jet flow state of the jet flow switching device when the hull is turned sharply to the left; Figure 8 is an explanatory diagram when the hull is reversed;
Figure 9 is an explanatory diagram of a ship equipped with a conventional jet flow switching device;
FIG. 10 is a plan view of a conventional jet flow switching device, and FIG. 11 is an explanatory diagram showing jet flow switching in the conventional jet flow switching device. 1... Hull, 2... Pump, 3-- Steering pipe, 4- Reverse cover, 5... Outlet jet, 6... Sea surface, 7...
Jet flow, 8. Jet flow switching device, 9... Connection pipe, 10...
Flow rate switching body, 10a...through opening, 10b...opening, 11...rotating mechanism, agent patent attorney crest 1
) Makoto (A)! Figure (8) Figure (A) Figure (A) Figure 10 (8) (C)

Claims (2)

[Claims] (1) A pump provided on the port and starboard sides of the stern for generating a jet flow, a jet flow switching device provided at the outlet of the pump for switching the outflow direction of the jet flow, and a jet flow switching device provided on the jet flow switching device for switching the outflow direction of the jet flow. a connecting pipe for causing the jet flow from the pump to flow out so as to have a velocity component in the forward direction of the ship; a jet flow switching body for changing the outflow direction of the jet flow; and a jet flow switching body provided on the main body of the jet flow switching body so that the jet flow from the pump flows out as is when the rotation angle of the jet flow switching body is zero. a through opening, and an opening that is bored in one direction perpendicular to the through opening of the jet flow switching body and for guiding the jet flow from the pump to the connecting pipe when the rotation angle of the jet flow switching body is at a right angle. A water injection propulsion and steering device characterized by comprising: (2) A pump provided on the port and starboard sides of the stern for generating a jet flow, a jet flow switching device provided at the outlet of the pump for switching the outflow direction of the jet flow, and a jet flow switching device provided on the jet flow switching device for switching the outflow direction of the jet flow. a connecting pipe for causing the jet flow from the pump to flow out so as to have a velocity component in the forward direction of the ship; A jet flow switching body for changing the outflow direction of the jet flow, the rotation angle of the port jet flow switching body and the starboard jet flow switching body is set to zero during straight cruising, and the rotation angle of the port jet flow switching body or the starboard jet flow switching body is set to zero during a small turn. The jet flow switching body on only one side is rotated slightly, and the outflow direction of the jet flow on one side is changed by the inner wall of the jet flow switching body opening.When making a large turn, the jet flow switching body on only one side, port or starboard, is rotated to direct the jet from the connecting pipe outlet. A water injection propulsion steering method characterized by ejecting water from port and starboard connecting pipe outlets when reversing.