JP2011218915A - Propeller-water-flow improving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propeller-water-flow improving device capable of enhancing a propulsion efficiency of a ship by efficiently using the eddy water flow in propeller rear flow of a ship.SOLUTION: For efficiently using the propeller-water-flow on which no attention has been focused, an outer periphery of a propeller 3 is surrounded by a cylinder 1 from the front part to the rear part of the propeller 3. In addition, a water flow outlet 2 is provided for the cylinder 1 so that the water flow can flow out of the cylinder 1 at higher water flow speed than water flow speed in the cylinder 1 behind the propeller 3 at the time of flowing the water flow out of the cylinder 1.

Description

  The present invention relates to a propeller water flow improvement device that increases the propulsion efficiency of a ship by increasing the speed of the propeller water flow.

  Various methods for improving propeller propulsion efficiency have been proposed. For example, Document 1 proposes a separation reducing member that suppresses separation of water flow from the surface of a propeller blade. Further, Document 2 proposes that the auxiliary propellers are arranged on the left and right sides of the main propeller so that the propeller vortices do not interfere with each other and the propulsion efficiency of the ship is improved. In addition to this, proposals have been made to improve the propulsion efficiency by taking a posture corresponding to the traveling conditions during the navigation of the hull.

JP 2008-247078 A JP 2009-067213 A

  However, in the conventional proposal, as described above, the propeller and the efficiency of the propeller section are required, or the propeller is required to increase the propulsion efficiency by reducing the resistance to the water flow of the hull. There was no way to efficiently use the spiral water flow. For example, if you look at the wake behind the propeller of a navigating ship, the water surface is a wave, as is clear. As can be seen from this, the water flow after the propeller was left as it was.

  The present invention has been made in consideration of the above circumstances, and an object of the present invention is to improve the propulsion efficiency of a ship by using a water flow pushed out by a propeller.

  In order to collect the water flow after the propeller, a cylinder surrounding the propeller is fixed to the hull from the front to the rear of the propeller so that the propeller water flows in the cylinder. Furthermore, by making the part of the cylinder behind the propeller or the part of the water outlet of the cylinder thinner, narrower or smaller than the diameter of the cylinder of the outer periphery of the propeller, the outer periphery of the propeller and the outlet of the rear are from the inside of the cylinder with the same diameter. It can flow out of the cylinder at a speed faster than the speed of the propeller water flow. In addition to this, it is also possible to adopt a structure capable of adjusting the amount of flowing water or the outflow speed. For example, a structure in which the tube tip can be opened in a tube having a narrow or small tube tip can be used. In addition, it is possible to adjust the outflow amount of the propeller water flow by providing two or more openable / closable holes in the cylinder portion after the propeller portion and opening and closing these holes. It is also possible to provide two or more cylinders with different outlets and replace these cylinders with the cylinder portion of the propeller portion. As a result, the speed of the ship can be adjusted even when the rotation speed of the propeller is constant. In other words, in the case of only the propeller, in order to increase the speed, the speed does not increase unless the rotation speed of the propeller is increased.However, the outflow speed from the cylinder can be increased just by narrowing the cylinder tip, and consequently the speed of the ship is also increased. Can be raised. In addition, since the outflow speed of the water flow can be adjusted by arbitrarily changing the size of the outlet of the cylinder, the speed of the ship can be increased in the process of narrowing or reducing the outlet. Become. In addition, this pipe | tube can also be provided in a ship's body, when a propeller is in a ship's body.

As described above, the present invention has the following effects.
(1) The speed of the ship can be increased without changing the rotation speed of the propeller, and the navigation time can be shortened and the fuel consumption can be improved.
(2) The propeller can be applied from a low rotation to a high rotation, and the navigation speed of the vessel can be increased in comparison with the vessel speed without a cylinder in each rotation range.

FIG. 1 is an explanatory view showing a first embodiment of the present invention. FIG. 2 is an explanatory view of the water outlet 2 of the cylinder of the first embodiment. FIG. 3 is an explanatory view showing the first embodiment mounted on the hull 6. FIG. 4 is an explanatory view in which the water outlet 2 of the first embodiment is changed. FIG. 5 is an explanatory view showing a second embodiment of the present invention. FIG. 6 is an explanatory view showing a third embodiment of the present invention. FIG. 7 is an explanatory view of the third embodiment viewed from the rear. FIG. 8 is an explanatory view of the third embodiment viewed from the rear. FIG. 9 is a partial cross-sectional view of the vinyl tube 21 of the fourth embodiment of the present invention. FIG. 10 is an explanatory view showing a fourth embodiment of the present invention. FIG. 11 is an explanatory view showing a fifth embodiment of the present invention. FIG. 12 is an explanatory view in which the water outlet 2 of FIG. 11 is narrowed.

  Hereinafter, typical examples of the propeller water flow improvement device will be described with reference to the drawings. In the drawings, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 1 is an explanatory view showing a first embodiment of the present invention. The outer periphery of the propeller 3 is surrounded by the cylinder 1 so that the rotation of the propeller 3 is not hindered, and the propeller water flow is made to flow into the cylinder 1. The cylinder 1 is an arbitrary rear part of the propeller 3 from the front of the propeller 3. The diameter of the cylinder 1 is the same as that of the cylinder 1, and the inner area of the cylinder 1 through which the propeller water flow flows from the arbitrary portion toward the water outlet 2 of the cylinder 1 is smaller than the inner area of the cylinder 1 at the outer peripheral portion of the propeller 3. . FIG. 2 illustrates the shape of the water outlet 2 when the cylinder 1 is viewed from the rear. Due to the shape of the cylinder 1, the speed of the water flow that is pushed out by the propeller 3 is gradually higher than that immediately after the propeller 3 and is pushed out from the water outlet 2. Thereby, compared with the speed only of the conventional propeller 3, it becomes possible to raise the speed of a ship by the part which narrowed the water outflow port 2 with the same propeller rotation speed.

  FIG. 3 is an explanatory view showing the cylinder 1 mounted on a ship. The cylinder 1 is attached to the hull 6 by the attachment plate 5, and the attachment plate 5 is spaced in a lattice shape, so that water can be sufficiently taken into the propeller 3 in the cylinder 1. A net 4 is provided at the water inlet of the cylinder 1. Thereby, it is possible to prevent drifting objects such as dust from entering the cylinder 1 and to prevent the propeller 3 and the cylinder 1 from being damaged.

  In this embodiment, the shape of the cylinder 1 has been described as a cylindrical shape. However, the shape is not limited to this, and a rectangular shape or a hexagonal shape may be used. For example, an ellipse, a star, a round, and a thin gap can be freely set. Further, two or more water outlets 2 that are narrower or smaller can be provided in the cylinder 1. Further, the length of the tube 1 may be arbitrarily set according to the ship.

  Moreover, as shown in FIG. 4, after making it thin once, the water outlet 2 can also be made a little wider. Thereby, when a ship reverses, water becomes easy to flow in into the cylinder 1.

  Next, a typical example of changing the outflow amount of the propeller water flow from the cylinder 1 will be described. In the first embodiment, the shape of the water outlet 2 is fixed, but in this embodiment, the shape of the water outlet 2 can be arbitrarily changed to adjust the outflow amount or the outflow speed of the propeller water flow. .

  FIG. 5 shows an upper cylinder 7 whose upper half can be opened and closed behind the outer periphery of the propeller of the cylinder 1. The upper cylinder 7 is opened and closed by the vertical movement of the opening / closing bar 8. The means for operating the open / close bar 8 from the ship may be arbitrary, and the power to move may be either manually or electrically operated by the ship, and the stopper of the open / close bar 8 for keeping the upper cylinder 7 open or closed. Functions may be optionally provided. It should be noted that since it is sufficient to open the upper cylinder 7 a little, the open / close bar 8 can be raised and lowered a little.

  The upper cylinder 7 can be used by opening the upper cylinder 7 at a low speed such as when the ship is starting or reversing, so that a large amount of water can be discharged or introduced, so that a reduction in propeller thrust can be prevented. Moreover, the same effect as shifting up the gear of an automobile can be obtained by gradually closing the opened upper cylinder 7 when the speed of the ship starts to increase. As a result, the speed of the ship can be increased without increasing the rotational speed of the propeller.

  6, 7 and 8 are explanatory views showing a third embodiment of the present invention. In this embodiment, in order to change the speed of the propeller water flow flowing out from the cylinder 1, the cylinders 10 and 11 having different water outlets 2 are provided in addition to the cylinder 1. An example in which these cylinders are installed in an outboard motor will be described below.

  FIG. 6 is a side view of a state where the outboard motor 9 attached to the hull 6 is equipped with the cylinder 1, the cylinder 10, and the cylinder 11. The cylinder 1 is fixedly attached to the outer peripheral portion of the propeller of the outboard motor, and the cylinder 10 and the cylinder 11 are fixed by a gear box 18 attached to the outboard motor 9 and a fixing plate 14 extending from a rotatable shaft 17. ing. The cylinder 10 is provided with a stop plate 15 having a length equal to or less than a semicircle of the cylinder 1 that is hung on the outer periphery of the cylinder 1. It has a structure. This stop function is also provided as a stop plate 16 in the cylinder 11. For this reason, the cylinder 10 and the cylinder 11 have a structure that cannot be rotated more than 180 degrees. The gear boxes 18 and 19 have bevel gears built therein, and when the handle 20 is turned, the shaft 17 rotates through the gear boxes 18 and 19 to move the cylinder 10 and the cylinder 11. The handle 20 is also provided with a stopper function for preventing the handle 10 and the tube 11 from moving when the tube 10 and the tube 11 are rotated.

  Next, how to use the cylinder 10 and the cylinder 11 will be described. 7 and 8 are explanatory views of the outboard motor 9 attached to the hull 6 as seen from the rear. FIG. 7 shows a state in which the cylinder 10 and the cylinder 11 are horizontal. The difference between the cylinder 10 and the cylinder 11 is that the water outlet 13 of the cylinder 11 is narrower than the water outlet 12 of the cylinder 10. When the cylinder 10 and the cylinder 11 are in a horizontal state, the water flow of the cylinder 1 can be used, so this state is set at a low speed such as when the ship starts or reverses. When the speed starts to increase, the handle 20 is turned to rotate the cylinder 10 having a slightly larger water outlet 12 90 degrees counterclockwise and connect to the cylinder 1. FIG. 6 is a diagram illustrating this state as viewed from the side.

  To further increase the speed, the cylinder 11 is rotated 180 degrees clockwise from the position where the cylinder 11 in FIG. FIG. 8 shows this state. As a result, three-stage speed adjustment of the cylinder 1, the cylinder 10, and the cylinder 11 can be performed even when the propeller rotational speed is constant.

  Next, a fourth embodiment of the present invention will be described. The cylinder is made of a plastic cylinder 21 made of a material having flexibility and elasticity, and further, the outflow amount and speed of the propeller water flow are freely adjusted by deforming the vinyl cylinder 21 to make the inside of the cylinder thinner or smaller. It is possible to make it possible.

  FIG. 9 is a partial cross-sectional view illustrating the internal structure of the vinyl tube 21. The propeller 3 is surrounded by a vinyl cylinder 21 from the outer periphery of the propeller 3 to the rear where the propeller water flow flows. A metal cylinder 22 is provided below the vinyl cylinder 21 on the outer periphery of the propeller 3 so that the soft vinyl cylinder 21 does not contact the propeller 3. The metal tube 22 and the vinyl tube 21 must be firmly attached so that they are not peeled off by the force of water flow. This attachment means may be arbitrary, but it is desirable to attach it mechanically firmly with screws or the like.

  Next, a typical embodiment in which the characteristic of the vinyl cylinder 21 in FIG. 9 is utilized to increase the speed of the propeller water flow and flow out of the cylinder 21 will be described.

  FIG. 10 shows a pressing plate 23 integrated with a rod 24 extending from a hull (not shown) on both sides of the water outlet 2 portion of the vinyl tube 21. By rotating the rod 24 from the hull side, the vinyl tube 21 is moved. By crushing, the water outlet 2 is narrowed to increase the speed of the propeller water flow and flow out of the vinyl tube 21. The holding plate 23 is configured to be parallel to the thick portion of the vinyl tube 21 when the ship is stopped, and when the ship enters a sailing state, the holding plate 23 is gradually rotated to crush the vinyl tube 21.

  Another example will be described as means for narrowing the vinyl tube 21 by the holding plate 23. FIG. 11 is an explanatory view showing an example in which the holding plate 23 is moved by the rope 26. A fixing plate 25 fixed to the hull is provided at the lower part of the vinyl cylinder 21 up to the rear end of the vinyl cylinder 21, and pressing plates 23 for pressing the vinyl cylinder 21 are rotatably attached to both sides of the fixing plate 25. This is a structure in which a rope 26 is connected to the upper part and passed through a cylinder 27. The cylinder 27 is arranged from the hull (not shown) to the vicinity of the upper part of the vinyl cylinder 21, and FIG. 11 shows a state where the rope 26 is loosened, the holding plate 23 is opened, and the water outlet 2 is opened. FIG. 12 shows a state in which the holding plate 23 is pulled up by pulling the rope 26 from the hull side and the water outlet 2 portion of the vinyl tube 21 is pressed from both sides to be narrowed.

  The means for moving the pressing plate 23 is not limited to the fourth and fifth embodiments. For example, instead of the rod 24 or the rope 26, a rod or a plate having a folding scale type fulcrum is combined. Or use a spring. Or you may make it arbitrary with ships, such as putting in and out air to a bag or a pipe | tube, and moving the pressing plate 23. FIG.

    This makes it possible to increase the speed of the ship without increasing the propeller rotation speed. Furthermore, when compared to a car, the speed can be increased smoothly like a continuously variable transmission. It is also possible to select an arbitrary speed by stopping the holding plate 23 at an arbitrary angle.

  As described above, the basic embodiment of the present invention has been described, but the present invention aims to increase the propulsion efficiency or the navigation speed of the ship efficiently by increasing the speed of the propeller water flow flowing in the cylinder 1 and discharging it. If it attaches to this objective, it will not be restricted to said Example. For example, the shape of the cylinder 1 may be any shape as long as it is a circle, a polygon such as a quadrangle or a hexagon, or a cylinder. Further, the shape and size of the propeller water outlet 2 may be any shape such as a round shape, a rectangular shape, a star shape, etc. if the area or thickness of the diameter of the cylinder 1 on the outer periphery of the propeller is smaller or narrower. It is also possible to arbitrarily provide two or more water outlets 2.

  Further, in the second embodiment, the upper cylinder 7 that can be opened and closed is provided for the purpose of changing the outflow amount. However, the outer periphery of the propeller may be opened in the longitudinal half, or two or more holes may be provided in the cylinder 1. The hole can be opened and closed. In the hole structure, the cylinder 1 is doubled and the upper or lower cylinder is rotated or slid to open or close the hole. Alternatively, it may be arbitrary as long as the outflow amount can be adjusted, for example, by opening and closing the lid by providing a lid. Further, the cylinder 1 can be opened and closed by dividing the cylinder 1 into two or more pieces and closing or loosening the cylinder 1 with a rope or a chain. Further, the cylinder 1 can be branched into two or more cylinders from an arbitrary portion after the cylinder 1 on the outer periphery of the propeller. In addition, it is also possible to provide a valve in a branch portion of the cylinder 1 or a divided cylinder, and to open and close the valve so that a propeller water flow flows through an arbitrary cylinder. Moreover, each cylinder divided | segmented into 2 or more cylinders can also be made into the cylinder from which the water outflow port 2 differs. In addition, any other mechanism for changing the outflow amount may be used.

  Moreover, although the cylinders 10 and 11 connected to the cylinder 1 of the third embodiment are two cylinders, this may be three or more cylinders, and this allows finer speed adjustment.

  In the fourth and fifth embodiments, the material of the cylinder 21 is vinyl. However, in the present invention, any material having flexibility and elasticity may be used. For example, natural and synthetic rubber materials, soft synthetic resin materials may be used. Various materials such as can be used. Also, the means for deforming the cylinder 21 may be a rod other than the pressing plate 23, may be tightened by wrapping a rope or chain, or other mechanical means, or a combination of a gas such as air and a pump. The means for deforming such as means may be freely changed in design by the ship. Moreover, it is good also considering the water outlet 2 of the pipe | tube 21 as two or more places, and can also divide the pipe | tube 21 into two or more pipe | tubes from the middle, and can adjust a water flow speed.

  Further, the thickness and length of the cylinder 1 according to the present invention may be arbitrary. For example, the cylinder may be extended to the side of the rudder normally behind the propeller or to the rear. In the case of a ship having a propeller in the hull, a cylinder can be provided in the hull.

  As described above, since the present invention has a simple structure, the present invention has a wide range of applications that can be installed on all small to large ships propelled by propellers including outboard motors. In addition, it is possible to provide a ship that has a high economic effect such as fuel efficiency obtained by installing it and shortening of navigation time compared to the cost of equipment.

1 cylinder 2 water outlet 3 propeller 4 net 5 mounting plate 6 hull 7 upper cylinder 8 open / close rod 9 outboard motor 10 cylinder 11 cylinder 12 water outlet 13 water outlet 14 fixed plate 15 stop plate 16 stop plate 17 shaft 18 gear box 19 gear Box 20 Handle 21 Vinyl tube 22 Metal tube 23 Holding plate 24 Bar 25 Fixing plate 26 Tight 27 Tube

Claims (10)

  In a cylinder that surrounds the outer periphery of the propeller of the ship propelled by the propeller in a cylindrical shape and allows the propeller water flow to flow into the cylinder, it is provided with means for increasing the speed of the propeller water flow flowing in the cylinder and letting it out of the cylinder Propeller water flow improvement device.   The propeller water flow improvement device according to claim 1, wherein the shape of the tube portion behind the propeller or the tube shape of the water flow outlet portion is narrower or smaller than the thickness of the tube at the outer peripheral portion of the propeller.   The propeller water flow improvement device according to claim 1 or 2, wherein the number of water outlets of the tube is two or more.   4. A propeller water flow improving device according to claim 1, wherein the cylinder is provided with means for changing the outflow amount of the propeller water flow.   5. The propeller water flow improvement device according to claim 1, wherein the cylinder portion behind the outer periphery of the propeller can be opened and closed, and the amount of the propeller water flow flowing out of the cylinder can be adjusted.   At least one openable and closable hole through which the propeller water flow exits the propeller water flow outlet, which is different from the propeller water flow outlet of the tube, is provided at the rear of the outer periphery of the propeller. The propeller water flow improvement device according to claim 1, 2, 3, 4, or 5, characterized by adjusting.   5. The propeller water flow improvement device according to claim 1, wherein two or more cylinders having different water outlet shapes are used alternately.   The propeller water flow improvement device according to claim 1, 2, 3, or 4, wherein the cylinder is made of a material having flexibility and elasticity that can be freely deformed.   The propeller water flow improvement device according to claim 8, further comprising means for deforming the cylinder according to claim 8, wherein the propeller water flow is made to flow out at a higher speed than the cylinder deformed by the means. 10. A propeller water flow improvement device according to claim 1, wherein means for preventing foreign matter from flowing into the cylinder is provided at the water intake of the cylinder.

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