JPS6033715B2 - Hull propulsion system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a propulsion device for a ship.

By the way, the water resistance experienced when the hull moves forward mainly consists of bow waves (wave-making resistance on the bow side) and stern waves (
Wave-making resistance on the caudal side) is thought to be the cause.

For this reason, proposals have been made, for example, to reduce bow waves by forming a spherical part on the bow, or to reduce stern waves by forming an inclined surface from the center of the bottom toward the stern. However, the current situation is that satisfactory results have not yet been obtained in any of these methods, as the overall effect of reducing wave-making resistance on the hull is insufficient. Also, conventionally,
In addition to providing a V-shaped water guide pipe leading from both port and starboard sides of the bow side of the hull to the center of the stern, an on-off valve is provided in the guide pipe, and a propeller for propulsion is installed at the point where the above guide pipes join. A propulsion system for a hull equipped with a
5-59081, etc.), but in this case, drainage and absorption of water during forward and reverse movement of the ship would be carried out from the center of the stern, which would reduce maneuverability, especially when the ship turns left and right. There is a problem that it is bad. Therefore, it has been proposed to improve the operability by arranging the V-shaped water transfer pipes in an X-shape (for example, Tsubaki Sekisho No. 48-154696, Samurai Kimiaki 49-39476, etc.).

However, since the diameter of the water intake holes in the water guide pipe described above is large or multiple in the bow or stern, when the ship floats, outside air is sucked in from the water intake holes to generate propulsive force. There are harmful effects such as reducing the amount of water and causing cavitation in the concession pipe.
Therefore, it has serious drawbacks as a propulsion device for a ship. This invention aims to prevent the suction of outside air from the water suction holes as described above, thereby facilitating the propulsion of the hull and preventing the occurrence of cavitation in the suction and drainage path from the water suction holes to the drainage holes. A further object of the present invention is to efficiently reduce bow waves and stern waves to facilitate propulsion of a ship and to improve maneuverability of the ship. The embodiment shown in the figure will be described.

In the figure, A is the hull of the hull, with a bow section 1 and a stern section 2.
Water intake holes 3, 4 and drainage holes 5, 6 are provided below the water intake line B and symmetrically with respect to the center of the hull. , 4 and drainage holes 5, 6 are provided in a suitable state through relatively small water guide pipes 7, 8 installed along both the starboard and starboard sides, respectively, to provide a water absorption path D for water C such as seawater. Each consists of

However, a plurality of the self-water absorption holes 3 and 4 are exposed on both the port and starboard sides of the bow section 1, and a silk body 9 is appropriately stretched at the outer closed end to prevent the intrusion of fish and other foreign matter. A lid 10 consisting of an opening/closing valve or an opening/closing lid for the water suction hole is provided at the inner closed end thereof, and the lid is linked to a suitable pressure sensor 11 side.

That is, the lid 10 is provided so as to open the water suction holes 3 and 4 when the pressure sensor 11 senses water pressure, and to automatically close the water suction holes in other cases, particularly in the ventilation state. Reference numerals 12 and 13 are switching valves for ship operation provided between the water intake holes 3 and 4 and the water conduit pipes 7 and 8, respectively;
The water suction hole and the water conduit are provided so as to be able to connect and shut off, and branched water conduit pipes 14 and 15 from opposite sides of the water suction holes 4 and 3 are connected to the switching valve, respectively. Therefore, by operating the cut valve, for example, as shown in FIG. 4, water C introduced from the port side water intake hole 3
can be guided through the branch water conduit pipe 15 to the water conduit pipe 8 side on the starboard side.

Reference numerals 16 and 17 indicate propulsion propellers installed in the water conduit pipes 7 and 8 on the stern part 2 side, respectively, and the propellers are connected to engines 18 and 19 installed in the hull A, appropriate clutches 20 and 21, and rotation. Each is connected via shafts 22 and 23,
Therefore, when the propeller is rotated in the forward direction to forcibly absorb the water C on the bow section 1 side, the water conduit pipes 7 and 8 are relatively
・Coupled with the fact that it is formed as a diameter, the stern part 2
Drainage is forcefully ejected from the drainage holes 5 and 6.

In the figure, reference numeral 24 indicates a water direction plate that also serves as a foreign matter intrusion prevention member provided at the outer end of the drainage holes 5 and 6, but when the hull A is moving astern, the drainage holes 5 and 6 also serve as water absorption holes. Therefore, a silk body (not shown) similar to the silk body 9 of the water absorption holes 3 and 4 described above may be stretched between the outer ends of the water direction plate 24 or the like.

In addition, the water absorption holes 3 and 4 are shown in the figure in such a way that their opening positions are alternately staggered to improve and equalize the water absorption effect. Each hole may be formed as one or a small number of large water suction holes, and each of the closed portions may be provided with a valve or the like that can appropriately limit the amount of water absorbed.

In the entrusted configuration, when moving the hull A forward, first, as shown in FIG. Valve 1
In this state, the propellers 16,
17 in the forward direction, and at this time, the water C on the bow section 1 side flows through the water intake holes 3 and 4, the valves 12 and 13, and the water conduit pipe 7.
, 8, and the water is forcibly absorbed and guided through the stern section 2.
Water is forcibly drained from the drainage holes 5 and 6 in a direction substantially parallel to the center line of the hull A.

However, as mentioned above, performing the water absorption action from the bow part 1 side and the drainage action from the two stern legs at the same time is not the same as the conventional bow part 1, as shown by the chain line in Fig. 1. In addition, for the stern section 2, due to the drainage on both port and starboard sides that are approximately parallel to the center line of the hull A, the bow wave E applied to the stern section is significantly reduced. Since the generation of vortices and the like can be prevented and the deceleration effect on the hull can be removed, the overall wave-making resistance to the hull A can be significantly reduced. In addition, when the hull A is to be turned to the left, for example, as shown in FIG. 4, first, as shown in FIG. At the same time, the valve 13 on the starboard side is operated to cut off the water intake hole 4 on the starboard side and the water guide pipe 8, and the above-mentioned water intake on the port side is blocked. The hole 3 and the water conduit 8 on the starboard side are connected to each other via the branch water conduit 15, and in this state, only the propulsion propeller 7 on the starboard side is rotated in the forward direction. The water C on the port side in 1 is forcibly absorbed, and the water is transferred to the branch water pipe 15.
The water is forcibly drained from the drain hole 6 through the water conduit 8 on the starboard side.

However, by absorbing the water C on the port side of the bow section 1 and discharging it from the starboard drain hole 6, the bow wave applied to the port side of the bow section 1 is reduced and the left turning action of the bow section 1 is improved. Not only is it easier to do this, but the starboard drainage is
This effectively and rationally acts as a propulsive force for turning the vehicle to the left. In addition, when moving hull A astern,
It is sufficient to set the suction and drainage path D in the same manner as when the ship is moving forward (Fig. 3), and to simultaneously reversely rotate the left and right propellers 16 and 17. Furthermore, when turning the ship A to the right, It is sufficient to set the drainage path D in the opposite state to the state described above when the ship turns to the left (Fig. 4) and rotate only the port side propeller 16 in the forward direction, and by selecting or using the above-mentioned actions in combination. , it becomes possible to maneuver the vessel A when it goes to shore or leaves the shore.

Further, since the lid body 10 provided for the water suction holes 3 and 4 can automatically close the water suction holes 3 and 4 when the water suction holes are in the ventilation state using the pressure sensor 11, for example, if the water suction holes 3 and 4 Even in the case where the water suction hole is located above B, air can be prevented from being sucked in from the water suction hole, and cavitation can be prevented from occurring in the water suction and drainage path D. As described above, the device of the present invention creates a suction and drainage path that runs from the bow side to the stern side in each direction, which is below the water line and is symmetrical with respect to the center of the hull. In addition, a switching valve for vessel maneuvering and a propeller for propulsion are separately arranged in each of the routes, and each switching valve has a branch water conduit pipe from the water intake hole side that is opposite to each other. Further, a plurality of water suction holes are provided in each of the water suction/drainage paths, and a related lid is provided on each of the water suction holes, and the lid and the pressure sensor are connected to each other. According to the structure of the present invention, for example, when the hull moves forward, the water line on the bow side is substantially lowered due to the buoyancy of waves, etc. Even in such a case, the lid of the water intake hole that tries to suck in outside air will be closed by a pressure sensor to reliably prevent the intake action, so there will be no problem such as a decrease in the propulsion force of the hull due to intake of air into the intake and drainage path. Because the harmful effects can be removed,
This provides excellent effects such as smooth propulsion of the hull and the ability to reliably prevent cavitation from occurring in the path. Further, since the present invention has the above-described configuration, by operating the switching valve, when the ship moves forward, bow waves and stern waves can be significantly reduced, and the ship can not only be easily propelled but also , by operating the above valve,
In addition to being able to easily turn the hull left and right and improving the rational maneuverability of the hull, it also has significant effects such as the ability to omit the i-device normally installed at the stern. be.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view of the hull, Fig. 2 is a front view thereof, Fig. 3 is a schematic sectional view taken along line 1-1 in Fig. 1, and Fig. 4 is a hull view. FIG. A... Hull, B... Water line, D... Suction and drainage route, 1... Bow section, 2... Stern section, 3, 4... Water absorption hole, 5, 6... ...Drainage hole, 7,8... Water pipe,
10... Lid body, 11... Pressure sensor, 12, 13... Fusuma valve, 14, 15...
... Branch water pipe, 16, 17... Propeller. Figure 1 Figure 2 Figure S

Claims (1)

[Claims] 1 Separate suction and drainage routes communicating from the bow side to the stern side are provided at each position below the water line and symmetrical with respect to the center of the hull, and each of the routes A switching valve for maneuvering the ship and a propeller for propulsion are installed separately, and each of the switching valves is connected to a branch water pipe from the opposite side of the water intake hole. A plurality of water absorption holes are provided, each of the water absorption holes is provided with a lid for opening and closing the water absorption hole, and the lid and the pressure sensor are individually linked to each other. A propulsion system for the hull.