JPH08207896A - Frame shape of turning propulsion system for ships - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the propulsion resistance of the ship and increase the speed of the ship. [Structure] Frame 2 which is a support structure for the swivel-type propulsion device 1
The bottom plate 2a has a three-dimensional curved surface shape corresponding to the curved shape of the hull outer plate 24 so as to be continuous with the hull outer plate 24 and the fair. The bottom plate 2a is smoothly connected to the surrounding hull outer plate 24 so that the bottom plate 2a constitutes a part of the hull outer plate 24. Since the entire hull skin 24 has a fair curve, the water flow along the hull skin 24 is very smooth and the propulsion resistance of the ship is reduced during navigation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shape of a frame which serves as a support structure when a turning type propulsion device for a ship is mounted in the ship.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show an example in which a turning type propulsion device 1 for a ship, in which a propeller for propulsion is horizontally turned and steered, is installed in a ship. The propulsion device 1 has an opening provided in a bottom plate 2a of a frame 2 (column) that constitutes a part of the stern bottom of a ship, and an upper end portion of a strut 4 arranged vertically through the opening via a bearing 5. The frame 2 is rotatably supported by the frame 2, and the ring gear 6 attached to the outer peripheral surface of the upper end of the strut 4 is meshed with the gear 8 on the output shaft of the swing drive device 7 installed on the frame 2. A propeller pot 9 is fixed to the lower end of 4, and a propeller shaft 10 having a propeller 11 attached to its rear end is rotatably supported inside the propeller pot 9 so as to be horizontal. 1 The bevel gear 12 fixed to the front end of the above is meshed with the bevel gear 13 at the lower end of the vertical shaft 3 which is rotatably supported in the strut 4, and the strut 4 is rotated by the turning drive device 7. By doing so, the propeller 11 is swung freely in a horizontal plane to operate the ship, and the power from the main engine 14 of the ship is transmitted to the propeller shaft 10 via the vertical shaft 3 to rotate the propeller 11. It is configured to generate a ship propulsion force.

As a mechanism for transmitting the power from the main engine 14 to the vertical shaft 3, a housing (gear casing) is used.
The input shaft 16 housed inside 15 is connected to the main engine 14 via the intermediate shaft 17, and is provided on the outer side of the tip end side of the input shaft 16.
A bevel gear 19 is fixed to one end and a hollow shaft 18 having an inner diameter slightly larger than the outer diameter of the input shaft 16 is fitted therein so that the hollow shaft 18 and the input shaft 16 can rotate concentrically. The hollow shaft is supported by a bearing 20, and a clutch 21 is interposed between the input shaft 16 and the hollow shaft 18, and a drive device 22 for turning on and off the clutch 21 is provided. The bevel gear 19 of 18 is meshed with the bevel gear 23 attached to the upper end of the vertical shaft 3, and the clutch 21 is fitted to fit the input shaft 16 and the hollow shaft 1.
By integrating the eight, the power of the main engine 14 is transmitted to the vertical shaft 3 via the intermediate shaft 17, the input shaft 16, the hollow shaft 18, and the bevel gears 19 and 23, and is further transmitted to the propeller shaft 10 and the propeller 11. Is designed to rotate.

When steering is performed using the turning propulsion device 1, the strut 4 is rotated by the turning drive device 7 including the marine vessel maneuvering such as forward movement to reverse movement or backward movement to forward movement of the ship so that the propeller 11 moves in the horizontal plane. Turn to an arbitrary angle with.

The bottom plate 2a of the frame 2 which serves as a support structure when the conventional swivel-type propulsion apparatus 1 is mounted in a ship is easy to manufacture, the manufacturing cost is reduced, the ship speed is slow, and the resistance must be taken into consideration. In order to avoid such a problem, it is formed in a flat plate shape, and the periphery of the bottom plate 2a is integrated with the hull outer plate 24 to form a part of the hull bottom plate.

[0006]

However, in the case where the frame of the conventional turning type propulsion device is a flat plate of the bottom plate 2a, the shape of the ship bottom outer plate 24a around the frame 2 is the bottom plate of the frame 2. By making the bottom plate 2a and the bottom plate 24a of the ship into a flat shape in conformity with the shape of 2a, the hull plate 24 can be made to have a fair shape in the extreme part. For the entire submerged part of the
Is not a fair curve, there is a problem that during the navigation of the ship, a separation phenomenon occurs in the water flow along the bottom plate 24 of the ship to cause a turbulent flow, which increases ship resistance and deteriorates propulsion performance. Therefore, when the frame bottom plate 2a has a flat plate shape, a large main engine horsepower is required to increase the boat speed.

Therefore, the present invention intends to provide a frame structure of a swing-type propulsion device which can achieve a high boat speed with a small propulsive horsepower by greatly reducing the resistance of the ship and improving the propulsion performance. To do.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention rotatably supports an upper end portion of a strut suspended from a frame attached to a hull, and vertically supports the inside of the strut. The vertical shaft arranged in the frame is rotatably supported by the frame, and the propeller shaft with the propeller attached to the rear end is rotatably supported inside the propeller pot fixed to the lower end of the strut, and the strut is swung. The propeller is rotated by a drive device so that the propeller is turned and steered in a horizontal plane, and further, the lower end of the vertical shaft and the propeller shaft are connected via a bevel gear, and an input shaft connected to the main engine is connected. Propulsive force is generated by connecting the input shaft and the vertical shaft so that the vertical shaft is rotated by power, and transmitting power from the vertical shaft to the propeller shaft to rotate the propeller. The bottom plate of the Frame as a support structure comprising pivoting propulsion device in the, to three-dimensional curved surface shape so as to be continuous to the curved shape and Fair hull.

[0009]

If the bottom plate of the frame has a three-dimensional curved surface shape that is continuous with the curved bottom plate of the ship bottom and the fair, the water flow along the bottom plate of the ship will be smooth, and the separation phenomenon of the water flow will be prevented and turbulence will occur. It is possible to suppress an increase in hull resistance.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention, which greatly improves the propulsion performance of a ship as compared with a propulsion device having only one propeller as shown in FIGS. A case of using a turning propulsion device equipped with a counter rotating propeller device that can be improved will be described.

That is, FIG. 4 shows a swivel-type propulsion device 1 equipped with the above-mentioned counter-rotating propeller device.
Similarly to the one shown in FIG. 6, the upper end of the strut 4 hung from the frame 2 is rotatably supported via a bearing 5, and the ring gear 6 attached to the outer peripheral surface of the upper end of the strut 4 is used as a turning drive device. By rotating by 7,
The propeller pot 9 fixed to the lower end of the strut 4 is integrally swung so that the propeller at the rear end of the propeller shaft, which is rotatably supported in the propeller pot 9, is swung in a horizontal plane for steering. In the configuration, the propeller shaft inside the propeller pot 9 is supported inside the propeller pot 9 so that the two propeller shafts 10a and 10b are concentric as a double structure including an outer propeller shaft 10a and an inner propeller shaft 10b. The front propeller 11a is attached to the rear end of the outer propeller shaft 10a, and the rear propeller 11b is attached to the rear end of the inner propeller shaft 10b, and the bevel gear 12a and the front end of the inner propeller shaft 10b are attached to the front end of the outer propeller shaft 10a. One of the bevel gears
2b is meshed with a bevel gear 13 attached to the lower end of a vertical shaft 3 which is axially supported inside the strut 4 to form a vertical shaft 3
Is rotated by the power from the input shaft 16 to rotate the front propeller 11a at the rear end of the outer propeller shaft 10a and the rear propeller 11b at the rear end of the inner propeller shaft 10b so as to generate propulsive force. To

The input shaft 16 is housed inside the housing 15, and a hollow shaft 18a for normal rotation having a bevel gear 19a for normal rotation fixed at one end is provided outside the input shaft 16 and a reverse shaft is provided at one end for reverse rotation. Reversing hollow shaft 18 with bevel gear 19b fixed
b is arranged so that the bevel gears 19a and 19b face each other, and the hollow shafts 18a and 18b are fitted in the input shaft 16 in a loosely fitted state, and each is rotated concentrically with the input shaft 16. In this way, the housing 15 is mounted via the bearings 20a and 20b.
The bevel gears 19a and 19b are supported inside, and the bevel gears 23 attached to the upper end of the vertical shaft 3 are meshed with each other. Further, the outer peripheral surface of the input shaft 16 and the inner peripheral surface of the hollow shaft 18a for normal rotation are formed. A forward rotation clutch 21a is provided between the input shaft 1 and
A reverse rotation clutch 21b is respectively interposed between the outer peripheral surface of No. 6 and the inner peripheral surface of the reverse rotation hollow shaft 18b. Further, two clutches are provided between the forward rotation clutch 21a and the reverse rotation clutch 21b. Bevel gears 19a and 1
An interlock mechanism is provided to prevent 9b from being integrated with the input shaft 16, and when one clutch is engaged, the other clutch is disengaged and is in an idle state.

A bottom plate 2 of a frame 2 which serves as a support structure when the swing-type propulsion device 1 having the above-mentioned structure is mounted in a ship.
The shape of a is a three-dimensional curved shape that is continuous with the hull outer plate 24 and the fair corresponding to the curved shape of the hull outer plate 24, and the bottom plate 2a of the frame 2 and the surrounding hull outer plate 24 are formed. A part of the hull skin 24 is formed so as to be continuous with a smooth curve so that the entire submerged portion of the ship forms a fair curve.

In the figure, the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals.

When propelling the vessel forward, the clutch 21b for reverse rotation is disengaged and the clutch 21a for forward rotation is inserted to allow the power from the main engine 14 to move to the intermediate shaft 17,
Transmission is made to the vertical shaft 3 via the input shaft 16, the hollow shaft 18a for normal rotation, the bevel gear 19a, and the bevel gear 23 at the upper end of the vertical shaft 3. Thereby, the outer propeller shaft 10a and the inner propeller shaft 10b are transmitted to the main engine 1 through the vertical shaft 3.
The motive power from 4 causes the propellers 11a and 11b to rotate in opposite directions, and the front propeller 11a and the rear propeller 11b are inverted to obtain a propulsive force for moving the ship forward. At this time, the shape of the bottom plate of the frame 2 of the swivel-type propulsion device 1 is changed to the hull outer plate 2
4 has a three-dimensional curved surface shape connected to the fair, the flow along the hull outer plate 24 becomes smooth, and the resistance due to the turbulence of the flow can be reduced. Therefore, in order to increase the ship speed, the bottom plate 2 of the present invention is compared with the conventional ship having the frame 2 in which the bottom plate 2a has a flat plate shape.
A ship provided with the frame 2 in which a has a three-dimensional curved surface shape can be extremely advantageously achieved with a small propulsive horsepower.

In the above-mentioned propulsion of the ship, when steering to change the course, the propeller 11 is rotated by rotating the strut 4 by the turning drive device 7.
By horizontally rotating a and 11b and changing the thrust direction, it can be propelled in any direction, and when propelling the ship backward, propellers 11a and 11b are used.
b may be turned by 180 degrees, or the reverse rotation clutch 21b may be inserted after the forward rotation clutch 21a is disengaged so that the main engine 14 is powered by the reverse rotation hollow shaft 18a.
If it is transmitted to the bevel gear 23 at the upper end of the vertical shaft 3 via b and the bevel gear 19b, the vertical shaft 3 is rotated in the direction opposite to the rotation direction when the marine vessel is moved forward, so that the marine vessel is moved backward. be able to.

Further, when the frame shape of the present invention and the propulsion device 1 having the contra-rotating propeller are used in combination as described above, the marine vessel propulsion performance can be further improved.

The present invention is not limited to the above-described embodiment. For example, instead of the propulsion device 1 having the contra-rotating propeller, the propulsion device 1 is provided with one propeller as shown in FIGS. Needless to say, various modifications may be made without departing from the scope of the present invention.

[0020]

As described above, according to the frame shape of the turning propulsion device for a ship of the present invention, the bottom plate of the frame which becomes a support structure when the turning propulsion device is mounted inside the ship is the hull outer plate. Since it is a three-dimensional curved shape that is continuous with the curved shape of the ship, the entire submerged part of the ship becomes a fair curve, the water flow flowing along the outer plate of the hull during the navigation of the ship becomes extremely smooth, and the water flow separation The phenomenon does not occur, the hull resistance can be reduced, the propulsion performance can be improved, and the high speed of the ship can be easily achieved, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a three-dimensional view showing a concept of a frame shape of a turning propulsion device for a ship of the present invention.

FIG. 2 is a schematic diagram showing an embodiment of the present invention.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a sectional view showing a turning type propulsion device equipped with a contra-rotating propeller device.

FIG. 5 is a schematic view showing an example of a frame shape of a conventional turning type propulsion device.

FIG. 6 is a sectional view showing a turning type propulsion device provided with only one propeller.

[Explanation of symbols]

 1 Swiveling Propulsion Device 2 Frame 2a Bottom Plate 3 Vertical Shaft 4 Strut 5 Bearing 6 Ring Gear 7 Swing Drive Device 8 Gear 9 Propeller Pot 10a Outer Propeller Shaft 10b Inner Propeller Shaft 11a Front Propeller 11b Rear Propeller 12a, 12b Bevel Gear 14 main engine 16 input shaft 18a forward rotation hollow shaft 18b reverse rotation hollow shaft 19a, 19b bevel gear 21a forward rotation clutch 21b reverse rotation clutch 23 bevel gear 24 hull outer plate

Claims (1)

[Claims] 1. An upper end portion of a strut suspended from a frame attached to a hull is rotatably supported by the frame, and a vertical shaft vertically arranged inside the strut is rotatably supported by the frame. A propeller shaft with a propeller attached to the rear end is rotatably supported inside a propeller pot fixed to the lower end of the strut, and the propeller is turned by a turning drive device to turn the propeller in a horizontal plane for steering. Further, the lower end of the vertical shaft and the propeller shaft are connected via a bevel gear, and the input shaft and the vertical shaft are connected so that the vertical shaft is rotated by the power from the input shaft connected to the main engine. The propeller shaft is rotated by transmitting power from the vertical shaft to the propeller shaft to generate a propulsion force. A frame structure of a swing-type propulsion device for a ship, characterized in that the bottom plate of the structure has a three-dimensional curved surface shape that is continuous with the curved shape of the hull outer plate and the fair.