JP2018112079A - Drag type opening closing undersea power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drag type generator that generates a high-drag difference using an ocean stream to rotate itself and generate power.SOLUTION: A drag type generator includes: a rotation shaft (4) extending into sea from a floating body (5); and a blade provided to an undersea part of the rotation shaft (4). The blade is connected to a blade frame (2) having function capable of opening and closing a space inside the blade frame with power control, by a cable (3a).SELECTED DRAWING: Figure 1

Description

The present invention relates to a drag-type open / close generator that generates electric power by ocean current.

  The density of seawater is about 1000 times that of air, and when converted to energy, 1 m / s of ocean current corresponds to 10 m / s of wind speed. Various ocean current generators have been made in order to utilize the enormous energy that always flows for 24 hours, but many of the generators are small to cope with the pressure caused by the density of water. It was.

Conventional generators using ocean currents have the following problems to be solved.
1. Since the structure supports the blades with only one point of the hub, it is weak in strength and difficult to increase in size.
2. Due to the structure that must receive the flow perpendicular to the rotating surface of the blade, the generator must be submerged in the sea.

  In order to achieve the above object, in the drag generator according to the present invention, a rotary shaft extending from the floating body into the sea is installed, and the space in the blade frame is opened and closed at the underwater portion of the rotary shaft. A blade having a function capable of being provided is provided, and the blades are connected by a cable.

  According to a second aspect of the present invention is the method according to the first aspect, wherein a wheel is provided on a blade having buoyancy, and the bottom of the floating body is circulated by the wheel.

  A third aspect of the present invention is the one according to the first aspect, wherein the surface of the blade frame that receives the drag is made convex to reduce the drag coefficient.

  The present invention is configured as described above and has the effects described below.

  When the mechanism according to claim 1 is used, by closing the space in the blade frame on one side across the rotation axis against the ocean current and opening the space in the blade frame on the opposite side, a drag difference occurs and the blade Rotate. Moreover, the intensity | strength of a blade | wing is ensured by connecting adjacent blade | wings with a cable. A generator is installed on the floating body. Since the generator can be installed on the sea, maintenance is easy. Since ocean currents are used, stable power generation is possible at all times.

  When the mechanism according to claim 2 is used, if the blades are enlarged to several tens of meters or more, a large load is applied to the rotating shaft. If this is a flat surface on the ground, it is not difficult to prevent the rotating shaft from collapsing by installing a wheel at the bottom of the blade and turning around the rail, but it is difficult to do the same thing by laying the rail on the sea floor. I will master it. Therefore, by providing buoyancy to the blades and providing a wheel on the upper portion of the blades, the lower surface of the floating body is turned around instead of the ground. As a result, even if the blades are increased in size, the load on the root portion of the rotating shaft can be greatly reduced.

  When the mechanism according to claim 3 is used, it is possible to suppress the resistance when the side on which the blade frame is opened rotates against the flow. In the case of the open / close type drag generator, the space in the blade frame on the side receiving the drag is opened and the space in the blade frame on the side receiving the drag is opened, but resistance naturally occurs also in the portion of the blade frame. In addition, the return rotation increases the relative speed with the fluid at most twice. Since the drag is proportional to the cube of the fluid velocity, considering only the frame portion, the side receiving the drag will receive a resistance of up to 8 times that of the blade frame receiving the drag. This will take away most of the rotational force. Thus, if one surface of the blade frame is bent into a convex shape and the opposite surface is formed into a concave shape, the drag coefficient can be made nearly double. Thereby, the resistance on the side receiving the drag can be reduced to about half, and the rotational force can be further increased.

It is a side view which shows the form for inventing. 1 is a side view showing Example 1. FIG. 1 is a perspective view from below showing Example 1. FIG. FIG. 6 is a perspective view of a blade from the lower side showing Example 2. 10 is a perspective view of a blade frame showing Example 3. FIG. 10 is a perspective view of a blade frame showing Example 3. FIG. 6 is a cross-sectional view of a blade frame showing Example 4. FIG.

  An embodiment for carrying out the present invention will be described with reference to FIG. A rotating shaft (4) that extends into the sea from the floating body (5) where the generator is installed is installed, and blades are provided in the underwater portion of the rotating shaft (4). The blades are opened and closed by power control. It is comprised by the blade frame (2) provided with (1). If the opening / closing curtain (1) on one side with the rotating shaft (4) is always closed and the opening / closing curtain (1) on the opposite side is opened with respect to the flow of the ocean current, a drag difference will be generated. 4) can be rotated. The blade frame (2) is connected by a cable. As a result, the bending can be suppressed and the strength can be secured, so that the blade can be enlarged. Using a frame instead of a cable is similar in terms of securing strength, but the cable is superior in weight and durability. Although the present invention is not efficient unlike the propeller type, the propeller type is not suitable for increasing the size because the blade is fixed only at the central portion. Unlike the propeller-type generator, the blades are installed horizontally, so even if the blade diameter is increased, it is difficult to be restricted by water depth. In addition, unlike the propeller type of a blade having a complicated shape, the rectangular blade frame (2) and the opening / closing curtain (1) are also suitable for enlargement and can be expanded and expanded step by step. .

  If the generator has a small blade diameter, the torque can be handled only by the central axis. However, if the blade diameter exceeds several hundreds of meters, the blade will be broken unless it is made too thick. Also, if all the blades are not closed due to a failure of the opening / closing control, it will break. Therefore, in the present invention, the floating body (5) is held on the seabed pile (7) by several cables (3b). Holding the outer side of the center of the rotating body can hold the lever with a smaller force in accordance with the lever principle.

  Example 1 will be described with reference to FIGS. In addition to the embodiment described above, the wheel (8) is attached to the upper end of the blade frame (2). By putting a buoyant material inside the blade frame (2), the wheel (8) is pressed against the floating body (5). The power generated by a drag generator is proportional to the area. In other words, if the area is the same regardless of whether it extends vertically or horizontally, the power generation is basically the same. Even if the area of the floating body (5) is the same, the power generation can be increased if it is extended vertically. However, if it is extended vertically, a larger load is applied to the base of the rotating shaft (4). Therefore, as described above, if the wheel (8) is attached to the upper part of the blade frame (2), the rotation of the rotating shaft (4) can be prevented and the load can be eliminated.

  A second embodiment will be described with reference to FIG. This is a type in which the blade is curved to increase the drag coefficient. Generating power can be increased by increasing the drag coefficient.

  A third embodiment will be described with reference to FIGS. This is a type in which the blade is U-shaped and the three surfaces and the blade end can be opened and closed by opening and closing (1). FIG. 5 shows a state where the opening / closing curtain (1) is opened and the space inside the blade frame (2) is closed, and FIG. 6 shows a state where the opening / closing curtain (1) is closed and the space inside the blade frame (2) is opened. If the resistance at the time of return rotation does not matter so much, the upper and lower curtains of the blade frame (2) need not be closed.

  A fourth embodiment will be described with reference to FIG. It is sectional drawing of a blade frame (2). The front and rear shapes of the blade frame (2) are changed so that a drag difference can be made. The surface on the side that receives the drag is concave and the side that receives it is convex.

DESCRIPTION OF SYMBOLS 1 Opening / closing curtain 2 Feather frame 3a Cable 3b Cable 4 Rotating shaft 5 Floating body 6 Power generation facility 7 Pile 8 Wheel 9 Submarine 10 Sea surface

Claims (3)

  A drag-type open / close type underwater generator in which a rotating shaft extending from the floating body into the sea is installed, and a blade with a function to open and close the space inside the blade frame is provided in the underwater portion of the rotating shaft, and the blades are connected with a cable. .   The drag-type open / close submersible generator according to claim 1, wherein a wheel is provided on a blade having buoyancy, and the bottom of the floating body is circulated by the wheel.   2. The drag-type open / close subsea generator according to claim 1, wherein a surface on which the drag is received is convex in the shape of the blade frame.

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