WO1998028185A1

WO1998028185A1 - Water-jet propulsive apparatus of boat

Info

Publication number: WO1998028185A1
Application number: PCT/JP1997/004714
Authority: WO
Inventors: Eiichi Ishigaki; Kazumitsu Oura
Original assignee: Ishigaki Company Limited
Priority date: 1996-12-20
Filing date: 1997-12-19
Publication date: 1998-07-02
Also published as: AU7872398A

Abstract

A driving ring (13) is provided between a jet casing (8) and a deflector (15) of a water-jet propulsive apparatus (1) in such a way as to be turned horizontally or vertically. The deflector (15) is provided perpendicularly to the driving ring (13) and swingably vertically or horizontally to switch the jet direction of a water-jet (J) vertically. A steering rudder (19) is attached to the lower part of the driving ring (13) or the deflector (15) to complement the steering function of the deflector (15). A plurality of protrusions (21 and 22) are formed at the exit part of the deflector (15), and external air accompanying spaces (S1 and S2) are formed in the deflector (15).

Description

Description Water jet propulsion device for boats

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet device for a watercraft, and more particularly to a waterjet device for a watercraft capable of changing the jetting direction of a water jet (that is, a bundle of water jet streams) in the axial direction of a deflector. It relates to a propulsion device. Background art

The water and water jet propulsion system of a boat has an intake mechanism that takes in water, an impeller mechanism that pressurizes the water that has been taken in, and a jet nozzle that squeezes out the pressurized water and discharges it outward as a water jet. The jet nozzle is usually located at the stern and fixed relative to the hull.

The water jet has a momentum having a positive main value in the discharge direction at the time of discharge, and as a reaction, a reverse momentum is applied to the hull via the jet nozzle and its supporting mechanism, Used for boat propulsion.

The discharge direction of the water jet coincides with the axis of the tip of the jet nozzle (hereinafter referred to as the “nozzle axis”), and the nozzle axis is usually the main reference line connecting the bow and stern of the hull or the main reference line. It is included in the vertical reference plane that includes the parallel reference line, and is set with a depression angle with respect to the horizontal reference plane that is parallel to the plane that includes the draft line when there is no cargo loading. For this reason, the trim is the front leg of the boat during water jet propulsion. Nevertheless, the conventional war-jet-jet propulsion system for boats has a problem that the jet-direction of the war-jet will approach the horizontal, and if the waves are high, the jet will hit the waves, making maneuvering difficult. Therefore, it was applied to still water craft, for example, ships around the bay and War Yuichi Craft.

An annular or short cylindrical deflector is added to the tip of the jet nozzle of the jet propulsion system for such a boat, and its axial direction can be horizontally swung with respect to the nozzle axis.

-Switch the discharge direction of the evening jet and use it to change the course of the boat. And is known.

For example, Japanese Utility Model Application Publication No. Hei 4-44480 discloses a water jet propulsion device equipped with a deflector that can pivot left and right of a nozzle axis.

The jet direction of the water jet ejected from the deflector to the outside almost coincides with the axial direction of the deflector.

Therefore, in the conventional water-jet-type jet propulsion device for a boat, even when the deflector is pivoted, the angle of its axis with respect to the horizontal reference plane of the hull does not change, and the jetting direction of the water jet is horizontal. It always has a constant depression angle with respect to the reference plane.

Here, it is assumed that the running speed of the boat is switched by changing the discharge amount of the war jet.

Changing the jet discharge rate changes the absolute value of the propulsion force and the vector component of each, changing the trim angle of the hull, and the seawater, lake, pond or river on which the boat floats. The horizontal reference plane of the hull inclines by that amount with respect to the virtual flat surface of the water (hereinafter referred to as “reference water surface”).

In this regard, in the above-mentioned conventional water-jet-type jet propulsion system, the relationship between the horizontal reference plane of the hull and the jetting direction of the water jet does not change even if the horizontal reference plane of the hull is inclined. Therefore, when the horizontal reference plane of the hull is tilted, the jetting direction of the jet every night with respect to the reference horizontal plane changes accordingly.

This change in jet direction may be equivalent to switching the cruising speed to the high speed side and deepening the front leg of the trim.

However, when the front leg becomes shallow due to switching to the low-speed side, the water jet hits the surface of the water, even if there are few waves, and the propulsive force is reduced by that amount, and the trim further approaches the uniform draft It is difficult to expect a smooth downshift.

In addition, the propulsion force due to hitting the water surface during low-speed cruising is remarkably reduced, resulting in a large energy loss and a practical application range for small hydropower boats using small-capacity power, such as small-sized watercraft crafts. Limited.

In this regard, Japanese Unexamined Patent Publication No. 6-12989 discloses a marine vessel having a configuration in which a half-split cylindrical variable throttle member is provided at the tip of a jet nozzle and both are covered by a deflector that can pivot left and right. A water jet propulsion device is disclosed.

This conventional water jet propulsion device for a marine vessel is the same as the previous conventional example in that its application is limited to still water craft and it is difficult to expect a smooth downshift. By reducing the water flow and increasing the injection speed during low-volume low-speed cruising, a significant decrease in propulsion can be suppressed.

However, during low-speed cruising with throttling, a small-sized jet nozzle is covered with useless deflectors that exceed the rating, resulting in the same state as operating at the rated capacity, resulting in large energy loss.

In addition, even during high-speed cruising with the throttle open, the throttle member acts as a flow resistance for each jet, resulting in a large energy loss, and it is not possible to obtain sufficient propulsion.

Furthermore, since the entrance side of the deflector is closed, regardless of the running speed, the war jet discharged from the jet nozzle swirls inside the deflector, and the propulsive force is reduced at this point as well, and the small hydrostatic Capacity boats must be targeted. Disclosure of the invention

The present invention has been made in view of the above points, and a water jet of a boat provided with a deflector that does not hit a relatively high wave with a water jet, and is not limited to still water use. Its purpose is to provide a propulsion device.

In addition, the present invention provides a one-to-one jet of a boat which can change course by using a deflector, and is not limited to a small-capacity watercraft for practical use, and can perform a smooth downshift. It is also intended to provide a propulsion device.

The present invention relates to a water jet jet propulsion device for a boat provided with a deflector for changing a jet direction of a water jet to a direction of an axis on an outlet side, and further includes a vertical angle component to the axis. A warp and jet jet propulsion device for a boat, comprising a shaft displacement mechanism for performing displacement including:

According to the present invention, a straight pipe, a curved pipe, a reducer, a variable restrictor, a composite pipe thereof, or the like, a deflector composed of appropriate pipe elements and the like on the outlet side, for example, along a normal vector of the outlet side opening Axis, the vertical angle component, that is, parallel to the vertical reference plane of the hull Arbitrary displacements, including angular components in the direction, for example, rotational displacement and, if necessary, translational displacement can be performed through appropriate steps, so that the water jet is substantially at zero degree from the reference level. Since the jet can be injected in the above-mentioned elevation direction, even if a relatively high wave comes, it does not interfere with the effective jet of the water jet, and the maneuvering is relatively easy, so that it is not limited to still water use.

The shaft displacement mechanism may be constituted by a pivot mechanism for pivotally supporting the deflector so as to be pivotable in the vertical direction, and an actuation mechanism for exerting an acting force on the deflector. Can be configured.

The displacement of the shaft center may include an angle component in a lateral direction, that is, an angle component in a direction parallel to a horizontal reference plane of the hull, whereby the course of the boat using the deflector can be switched.

The war-evening jet propulsion device may have a jet nozzle whose nozzle axis forms a depression angle with respect to the horizontal reference plane of the hull in order to discharge the war-evening jet. In this case, the exit side of the deflector during deceleration If the direction of the shaft center is set to an elevation angle equal to or higher than zero degrees from the reference water surface, the downshift can be performed smoothly and the propulsion force does not decrease due to hitting the water surface, so the applicable range is limited to small capacity boats You don't have to.

When the displacement of the shaft center includes a lateral angle component, a rudder member may be attached to the deflector, whereby the course switching is made smoother.

Further, in the present invention, water taken from an intake mechanism (hereinafter, often referred to as “suction port”) provided at a rear part of the hull is pressurized by an impeller mechanism (hereinafter, often referred to as “impeller”), and a jet nozzle is provided. (Hereinafter, this is often referred to as “discharge casing.”) In a water jet propulsion device for a marine vessel that sails using a propulsion force obtained by injecting the water jet through the rear of the stern as a water jet, the jet nozzle A ring member (hereinafter, often referred to as a “drive ring”) is pivotally mounted on the ring member, and a deflector is pivotally mounted on the ring member so that the respective pivot axes cross each other and the deflectors cross each other. It is designed to be freely pivotable in directions.

More specifically, a ring member is pivotally attached to a pair of spindles provided on the outer peripheral portion of the discharge port of the jet nozzle so as to be able to swing in the horizontal direction, and a deflector is pivotally supported to be able to swing in the vertical direction to this ring member. The jet angle of the war evening jet can be adjusted according to the speed of the boat. It is something that can be done.

Note that a steering snake may be fixed to a lower portion of the ring member, thereby complementing the rudder function of the deflector.

Alternatively, a ring member may be pivotally attached to a pair of spindles provided on the outer peripheral portion of the discharge port of the jet nozzle so as to be swingable in a vertical direction, and a deflector may be pivotally supported on this ring member so as to be swingable in a horizontal direction. At this time, a snake member may be fixed to the deflector. Further, a plurality of protrusions may be provided at the outlet of the deflector, so that excessive diffusion and turbulence of the water jet discharged from the discharge casing can be prevented.

Further, the inside of the deflector may be communicated with the outside on the inlet side, so that the energy loss due to the internal reversal vortex of the water jet that passes through the deflector can be suppressed.

Therefore, the watercraft equipped with the propulsion device according to the present invention performs low-speed cruising by jetting a warhead jet substantially parallel to the reference water surface from the deflector, and at a high-speed cruising, is in a gliding state. Control the jetting amount and jetting direction of the water jet according to the condition of the water surface and the loading capacity, etc., and sail without interference with the waves and the water surface.

If necessary, the course is changed by swinging the deflector left and right with respect to the vertical reference plane of the hull.

In addition, the snake member fixed to the ring member or deflector maintains the ship's hull's side slip at high speed running and keeps the needle at low speed.

Furthermore, unnecessary diffusion and turbulence of the water jet are suppressed by the outside air accompanying the deflector entrance and the projection at the exit. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of a watercraft equipped with a water jet jet propulsion device according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a warjet jet propulsion device for a boat according to a further embodiment of the present invention.

FIG. 3 is a side view of an essential part of the war-jet jet propulsion device of FIG.

FIG. 4 is a longitudinal sectional view of a main part of the war evening jet propulsion device of FIG. FIG. 5 is a sectional view taken along line AA of FIG.

FIG. 6 is a longitudinal sectional view of a main part of a water jet propulsion device for a boat according to a further embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same members are appropriately defined with the same reference numerals to avoid duplication of description.

FIG. 1 shows a state in which a watercraft V equipped with a war evening jet propulsion device P according to a first embodiment of the present invention floats on water W and is about to move to low speed cruising.

Vessel V consists of hull H and outfitting G. The propulsion device P has an intake mechanism P1 equipped with an intake port P11 for sucking water W from the lower part of the stern Hs of the hull H, that is, the center of the stern behind the midship and the bottom of each of Z or starboard stern and port stern An impeller mechanism P2 having an impeller for pressurizing the taken-in water W, and a jet nozzle P31 for discharging the pressurized water W as a jet J along the throttle nozzle axis X1 are provided. It consists of a combination of the discharge casing P3, the drive ring P41 and the deflector P42 that can be driven by the link mechanism P43, and determines the jetting direction of the water jet J by the vertical angle component and the horizontal or horizontal angle component. It comprises a deflector mechanism P4 for turning in any direction including the component, and a drive mechanism P5 for controllably driving the impeller mechanism and the link mechanism.

The nozzle axis X1 forms a depression angle with respect to the horizontal reference plane Rh of the hull H. When the boat V is floating above the water W, the horizontal reference plane R h of the hull H is parallel to the reference water surface W 0 of the water W, so that the nozzle axis X 1 is at an angle α with the reference water surface W 0. Intersect.

Therefore, the drive ring Ρ41 and the deflector Ρ42 are moved as required by the link mechanism Ρ43, and the deflector Ρ42 is pivoted upward by an angle (upward in the vertical direction) 3, whereby the deflector Ρ4 A motion equivalent to a combination of a rotational motion for displacing by an angle of; 3 in the vertical direction and a vertical translational motion corresponding to the cosine s in iS of the pivot radius is performed on the axis X 2 on the outlet side of 2 in the vertical direction. At the same time, the axis X 2 is set to be horizontal or higher than the reference water surface W 0, and the jetting of the water jet J along the axis X 2 is started. FIG. 2 shows a jet propulsion device 1 for a watercraft according to a second embodiment of the present invention. FIG. 3 is a side view of a main part of the propulsion device 1, FIG. 4 is a vertical cross-sectional view of the main part, and FIG. 5 is a cross-sectional view taken along line AA of FIG.

As shown in Fig. 2, the water jet propulsion device 1 sucks water from the suction port 4 of the suction casing 3 fixed to the stern 2 of the hull, and impels this water into the impeller 6 of the main body casing 5. The speed is increased by pressurizing, and the increased swirling flow is made into a linear flow by the guide vanes 7 and discharged from the reduced diameter discharge port 9 of the discharge casing 8 as a water jet. Reference numeral 10 denotes a drive shaft of the impeller 6.

As shown in FIGS. 3 to 5, the discharge casing 8 is provided with upper and lower seats 11 on the outer periphery of the discharge port 9, and upper and lower support pins 12 are implanted in the receiver 11 to form a ring. The drive ring 13 is pivotally supported on the pin 12 so that it can be rotated left and right around the axis of the pin, and the operation rod 14 is connected to the drive ring 13 so that the amount of rotation can be adjusted. Attach a conical trapezoidal cylindrical deflector 15 to 13. A space S1 for accommodating outside air is provided between the drive ring 13 and the discharge casing 8.

As shown in FIGS. 3 to 5, the deflector 15 is formed integrally with brackets 16 on the left and right walls, and the left and right brackets 16 respectively extend forward, that is, toward the discharge casing 8. Then, the extension is inserted and fitted into the groove in the inner wall of the drive ring 13 and is pivotally supported by the left and right support pins 17 so as to be able to turn up and down, as shown in FIG. By connecting the cable 18, the amount of rotation of the deflector 15 can be adjusted. A space S2 for accommodating outside air is provided between the deflector 15 and the drive ring 13. A plurality of hemispherical projections 21 are formed at the inner periphery of the rear part of the deflector 15, that is, at the outlet of the water jet, to smoothly guide the jets jetted from the discharge casing 8. Prevent the diffusion and turbulence of the water flow. The protrusion 21 may be plate-shaped.

When the drive ring 13 is rotated left and right with the operation rod 14, the deflector 15, which is supported by the support pin 17, also rotates to the left, and this deflector 15 is moved up and down with the push-bull cable 18. When rotated, the deflector 15 moves in a combination of left-right rotation and up-down rotation.

The drive ring 13 has a steering rudder 19 fixed to its lower end, and is steered by the left and right rotation components of the deflector 15 to prevent side slip when the course of the boat changes course and to keep the hand at low speed. Improve the performance. FIG. 6 is a vertical sectional view of a main part of a water jet propulsion device 1 for a boat according to a third embodiment of the present invention.

In the war evening jet propulsion device 1, support pins 17 are planted on the left and right outer walls of the discharge port 9 of the discharge casing 8, and the drive ring 13 is pivotally supported by the pins 17 so as to be vertically rotatable. A space S1 for accommodating outside air is provided between the drive ring 13 and the discharge casing 8.

In addition, the bracket 20 with the upper and lower walls at the front of the deflector 15 extended forward is supported by the support pins 12 at the top and bottom of the inner wall of the driving ring 13 so that the deflector 15 can be rotated left and right. To support. A space S2 for accommodating outside air is also provided between the deflector 15 and the drive ring 13. A plurality of projections 22 are formed on the inner periphery of the rear part of the deflector 15 to smoothly guide the water jet ejected from the discharge casing 8 to prevent the water flow from diffusing and disturbing. The projections 22 are plate-shaped, but may be hemispherical.

If the drive ring 13 is turned up and down, the deflector 15 also turns up and down, and if this deflector 15 is turned left and right, the deflector 15 will move in a combination of vertical and horizontal rotation. I do. The steering snake 19 is fixed to the lower end of the deflector 15. According to each of the above embodiments, by switching the deflector injection angle and injecting the war sunset, an appropriate propulsion force can be obtained according to the traveling state. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, the wartime jet propulsion apparatus of a boat whose practical application range is not limited to still water use is obtained.

Claims

The scope of the claims

1. A water / water jet propulsion device for a watercraft equipped with a deflector (P42) for changing a jetting direction of a water jet (J) to a direction of an axis (X2) on an outlet side, wherein the axis (X2) ) Is equipped with an axial displacement mechanism (Ρ4) for performing displacement including a vertical angle component (β).

2. The shaft displacement mechanism includes a pivot mechanism (12, 13, 17) for pivotally supporting the deflector (15) in a longitudinal direction, and an actuation mechanism (14, 18) for exerting an acting force on the deflector. 2. The war-jet propulsion device for a boat according to claim 1, comprising:

3. The water jet propulsion device for a boat according to claim 1, wherein the displacement of the shaft center (Χ2) includes a lateral angle component.

4. The war and jet jet propulsion device for a boat according to claim 2, wherein a rudder member (19) is attached to the deflector (15).

5. The marine vessel according to claim 1, wherein the war jet jet (J) is discharged from a jet nozzle (P31) whose nozzle axis (XI) forms a depression angle with respect to the horizontal reference plane (Rh) of the hull. War Yuichi jet propulsion device.

6. Intake mechanism (3, 4) provided at the rear of the hull (2) to take in water, impeller mechanism (5, 6, 7, 10) to pressurize the taken water, and water jet A jet jet propulsion device for a marine vessel that uses the propulsion force obtained by injecting the jetted jets to the rear of the stern and jetting the jetted jets (8, 9). In the above, a ring member (13) is pivotally attached to the jet nozzle, and a deflector (15) is pivotally attached to the ring member so as to intersect each pivot axis, and pivot the deflector in two directions intersecting each other. Adjustable water jet propulsion device for boats.

7. A ring member (13) is pivotally attached to a pair of support shafts (17) provided on the outer periphery of the discharge port (9) of the jet nozzle (8) so as to be swingable in the horizontal direction. 7. The waterjet propulsion device for a watercraft according to claim 6, wherein the kuta (15) is pivotably supported in a vertically swingable manner.

8. The claim 7 wherein a steering snake (1 9) is fixed to a lower portion of the ring member (1 3). A warplane jet propulsion device for a boat as described in the above.

9. A ring member (13) is pivotally attached to a pair of support shafts (117) provided on the outer periphery of the discharge port (9) of the jet nozzle (8) so as to be swingable in the vertical direction. 7. The watercraft jet propulsion device for a boat according to claim 6, wherein the recliner (15) is pivotally supported so as to be able to swing laterally.

10. The water jet propulsion device for a boat according to claim 9, wherein a steering snake (19) is fixed to a lower portion of the ring member (13).

1 1. The water / water jet propulsion device for a boat according to claim 6, wherein a plurality of projections (21, 22) are provided at an outlet of the deflector (15).

12. The water jet propulsion device for a boat according to claim 6, wherein the inside of the deflector (15) is communicated with the outside on the entrance side.