WO2018008857A1

WO2018008857A1 - Floating power generation apparatus

Info

Publication number: WO2018008857A1
Application number: PCT/KR2017/005936
Authority: WO
Inventors: 김용택
Original assignee: 김용택
Priority date: 2016-07-05
Filing date: 2017-06-08
Publication date: 2018-01-11

Abstract

The present invention relates to a floating power generation apparatus formed so as to generate electricity since a turbine power generator body, which can float on the surface of running water, that is, river water or seawater, rotates according to the running water in a state in which the turbine power generator body floats on the water, and to enable constant electricity to be generated all the time regardless of a change in water level by connecting and fixing steel rods to both sides of the turbine power generator body by shafts.

Description

Floating power plant

The present invention relates to a floating power generation apparatus, and more particularly, by generating a turbine generator body floating in flowing water, that is, floating on the water surface of the river or sea water in accordance with the water flowing in the floating state, the turbine generator body It is related to a floating power generation apparatus which is connected to a steel rod on both sides by a shaft so that the power can be constantly generated regardless of the water level fluctuation.

As is well known, the development of alternative energy and the use of renewable energy are increasing in an age where energy problems are increasing due to the crisis of the global environment.

Such renewable energy is bio, solar, hydrogen, wind, etc., but it is limited in terms of various facilities and scale in power generation using this, and the efficiency is generally low.

On the other hand, in the case of hydroelectric or tidal power, deep water (seawater) must be used, so the pillars are mounted high and the wings of the turbine are attached (two or three horizontal wings), which is the resistance of the flowing water (seawater). The blades are small in width and cannot be lengthened, and must be made firmly so that only a few percent of the cross-sectional area of the flowing water (seawater) is applied to the blades, resulting in low efficiency, and the columns are designed to withstand large loads and resistances. You need a large, robust facility. This means expensive and limited facilities.

In the case of existing hydropower or tidal power generation, there are challenges such as large area due to partial area of water (seawater), and other new and renewable energy generation facilities are limited, complicated structure and expensive to manufacture. There is such a problem.

Accordingly, the present invention has been made in order to solve the above-described problems, the fixing member is installed in both two places in order to use the kinetic energy of the water (river or sea water) flowing in a relatively large amount of water (sea water) By constructing a floating turbine with a spring-loaded steel rod to generate power, the kinetic energy of slowly or rapidly flowing water (river or sea water) can be easily and conveniently converted into electrical energy to provide a generator that can generate electricity. There is a purpose.

Other objects of the present invention will become clear as the technology proceeds.

In order to achieve the above object, the present invention provides a floating generator, which is provided with a fixed member 40 which is provided to be fixedly spaced apart from each other on the ground or the sea bottom, and an upper part or another of any one of the fixing members 40. Any one upper portion of the generator 51 and the bearing 25 are respectively installed via the generator support 28 and the bearing support 29 so as to be coupled to the steel rod support 46 is fixedly connected to the fixing member 40, The generator 51 and the bearing 25 are suspended in water by fixedly connecting each other end of the spring steel rod 20 and the other end of the spring steel rod 20 to one surface and the other surface. While it is characterized in that it comprises a turbine unit 10 is provided to enable power generation in the generator 51 by rotating the spring steel rod 20 as it corresponds to the flow of water.

In addition, the generator 51 or the bearing 25 controls the rotation of the spring steel rod 20 fixedly connected to the turbine unit 10 by reducing the water level with a water level sensor in case of emergency or repair or when the water level is lowered. It characterized in that the brake is further provided for.

According to the floating power generation apparatus according to the present invention as described above, by using the flow of the river or the algae of the sea to generate power, when the water (river or sea water) flows to the surface water of a certain depth, the kinetic energy of the water (river or sea water) is Lying horizontally over the water (river or sea water) rotates the integral turbine blades of the floating turbine body installed in the vertical direction to the water flow, generating power by rotating the generator with a spring steel rod connected by the turbine's rotational force, and generated electricity Will be exported to the power line. In this case, the turbine blade becomes a floating turbine body, which runs horizontally perpendicular to the water flow at a certain angle to the left and right spring steel rods of the same length, and is fixed to offset the floating turbine body load from each other due to the buoyancy of the water by the air tank. It is always submerged as much as the depth, so that the turbine blades are powered by the rotational force as much as the cross-sectional area of the submerged depth, generates electricity by the energy of the cross-sectional area of the flowing water, and can always generate a certain amount of power by generating a floating balance. .

In addition, the integral turbine blades of the floating turbine body rotate even in the case of weakly flowing surface water (river or sea water) (less than 0.5m / s per second), so it can generate power and is supported by spring bars with strong tensile strength and elasticity. As a result, it can be developed without any left or right flow even in urgent water current (current).

In addition, it is possible to maximize the power generation area by receiving the flowing water (river or sea water) regardless of the torsional moment with a strong spring steel bar. Since the generator is installed at the upper part of the stationary member away from the surface of the water and the packing part is exposed only to the air, the generator can be stably developed regardless of water leakage, which is power generation in general water. It is safe to cut off and it is convenient to separate and repair the generator body. In other words, it is possible to replace all the generator parts and parts to the level of bolting and tightening, so it is easy and convenient to repair and replace frequently. In addition, it allows frequent replacement of parts with a certain life, such as bearings, and makes it easy. Long facilities can withstand the flow of strong water (river or sea water) and the receiving area of water (river or sea water) can be vast. Since the turbine is cylindrical, it is strong in flexural strength, so it can be manufactured particularly long and large in diameter, and by adjusting the air volume of the air tank inside the turbine properly, the power generation of the turbine can be controlled by controlling the depth at which the turbine is submerged. Of course, it is possible to support it with a spring steel rod that can withstand tension and torsion that is strong enough to the left and right. In addition, it is possible to develop the movement of seawater by waves in the ocean, so that the wave power generation is possible.

In this way, the area receiving surface water (river or sea water) of a certain depth of the water surface can be more effectively and efficiently installed, and facilities can be conveniently developed in many rivers, rivers, and the sea.

Surface water, in particular, is advantageous for greater power generation because the water flows faster than at the lower or middle depths.

This will limit existing water turbines and allow the facility to replace expensive facilities that are relatively large relative to the amount of electricity generated, with water (seawater) less than a few percent of diameter. Since it is cylindrical, it is strong in flexural strength and its length can be especially long, so that the water (river or sea water) flow cross-sectional area is increased, so that a lot of power generation is possible. Can be used to develop.

1 is a view showing a floating power generation apparatus according to the present invention.

Figure 2a is a cross-sectional view showing a floating turbine body of the floating generator according to the present invention.

Figure 2b is a left, right side view showing the floating turbine body of the floating generator according to the present invention.

Figure 2c is an enlarged cross-sectional view showing the floating turbine body of the floating generator according to the present invention.

Figure 2d is a view showing the power generation effective area of the floating turbine body in the floating generator according to the present invention.

2E is an explanatory view of wave power generation drag coefficient aberration of the floating generator according to the present invention.

Figure 2f is an explanatory view of the generation of wave power drag coefficient aberration of the floating generator according to the present invention.

Figure 3a is a view showing a state in which the floating turbine body of the floating power generation apparatus according to the present invention is installed.

Figure 3b is a facility explanatory diagram of the floating turbine body of the floating power generation apparatus according to the present invention.

Figure 3c is an operation of the spring steel bar of the floating generator according to the present invention.

Figure 4a is an explanatory diagram according to the change in the water surface of the floating turbine body floating generator according to the present invention.

Figure 4b is an explanatory view of the generator and the bearing position of the floating generator according to the present invention.

Figure 4c is an enlarged view of the generator and the bearing of the floating generator according to the present invention.

Figure 4d is an enlarged view of the insulator of the floating power generation apparatus according to the present invention.

Figure 4e is an enlarged view of the buried anchor of the floating power generation apparatus according to the present invention.

5A is an explanatory diagram of a cylindrical buoy of the floating power generator according to the present invention.

5B is a cylindrical buoy operation diagram of the floating power generation apparatus according to the present invention.

6 is a view illustrating a brake of the floating generator according to the present invention.

Hereinafter, an embodiment of the floating generator according to the present invention will be described in detail.

First, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As shown in the floating power generation apparatus according to the present invention, as shown in Figures 1 to 6, the turbine portion 10, the spring steel rod 20, the flowing water 30, the fixing member 40, the generator portion ( 50), and a safety unit (60).

First, the fixing member 40 is fixed to be spaced apart from each other where water flows through a plurality of fixing wires 42, one end of which is fixed to the plurality of embedding anchors 43 embedded in the ground or the sea bottom. It is provided to be installable.

The generator support 28 and the bearing support 29 coupled to the steel rod support 46 are installed on the upper part of any one of the fixing members 40 or the other one of the generator 51 and the bearing 25, respectively. do.

In addition, each end of the rotatable spring steel rod 20 is connected to the generator 51 and the bearing 25, respectively.

Here, the spring steel rod 20 is a uniform rod 24 of uniform diameter connected to the generator 51 and the bearing 25, and further extends in one direction from the uniform steel rod 24, gradually increasing diameter Tapered spring steel bar 23 having a and a spring steel bar 21 is further extended from the tapered spring steel bar 23 in one direction and the steel bar bracket 22 is formed at the end of the steel bar bracket 22 to be fixedly connected to the turbine portion 10. do.

Here, the spring steel bar 21 is made of steel having an elastic force to increase the thickness to have a strong tensile strength and torsional strength.

Therefore, the floating power generator can generate power while being firmly enduring even a large natural disaster by the strong tension and elastic force of the spring steel bar 21 described above.

The turbine unit 10 is coupled to the steel rod bracket 22 formed at the other end of the spring steel rod 21 of the spring steel rod 20 as shown in FIG. By being floating in the water is provided to be rotatably corresponding to the flow of water.

That is, the turbine unit 10 is a plurality of one side and the other side to be coupled to the steel rod bracket 22 formed on the other end of the spring steel rod 21 of the spring steel rod 20 through a plurality of bolts 26, respectively. The bolt hole 27 of the formed, the cylindrical floating turbine body 11 is formed in the air tank 13 to be floating therein, and the water (river or sea water) flowing on the outer peripheral surface of the floating turbine body 11 It consists of a plurality of turbine blades 12 provided radially so as to utilize the energy of water (sea water) to effectively fit the area.

Since the turbine unit 10 is configured as described above, it is convenient to separate or assemble the floating turbine body 11 integrally.

Here, the turbine blades 12 can always generate electricity as long as the surface water (river or sea water) flows or moves.

When water (river or sea water) of surface water flows, water collides with the turbine blades 12 and drag is generated on the floating turbine body 11 to rotate.

That is, the moment is generated to rotate.

Looking at the floating turbine body 11, as shown in Figure 2a to produce a floating turbine body 11 in a cylindrical shape to make the inside of the air tank 13 and to seal the air to the same atmospheric pressure.

The floating turbine body 11 is installed horizontally parallel to the water surface 31 direction and formed to have a long length so as to be perpendicular to the water flow direction.

In addition, the above-mentioned floating turbine body 11 is a type in which the air tank 13 is permanently completely sealed at 1 atm, so that water leakage and air cannot leak out, and thus the floating turbine body 11 floats on the surface 31 of the surface water. .

It also bears the weight of the spring steel bar 21 coupled to the bolt 26 on one side and the other side and the floating turbine body 11 is always floating on the water surface 31.

2A and 2D, the floating turbine body 11 is formed to have a concave curved turbine blade 12 so as to receive the greatest resistance of water in the direction of water flow, as shown in FIGS. 2A and 2D, and is formed radially at the centerline of the cylinder. do.

Then, as shown in Figure 2d, the torque (Torque) due to the rotation of the turbine blades 12 is generated by the force of the water along the water flow direction (32).

Rotation force is generated according to the torque, and the floating turbine body 11 rotates.

Then, the spring steel bar 21 coupled to the bolt 26 on one side and the other side rotates, and the spring steel bar 21 that is integrated rotates.

The rotation of the spring steel rod 21 is rotated while the tapered spring 23 is rotated as shown in FIG. 3C, thereby causing a bending stress, and the bending stress is represented by F, G, and H shown in FIG. 3C. As the stress is stored and released, there is almost no energy consumption and waste.

That is, in "F", the compression energy is stored, and as it rotates, it becomes the maximum like "G", and if it continues to rotate, it helps rotation force and releases energy, so there is almost no energy change by bending rotation itself.

In other words, it is the same principle that spring stores and releases energy. Therefore, the tapered spring 23 is bent and rotates with little energy consumption due to bending rotation, and transmits energy to the uniform steel bar 24.

The tapered spring 23 is made of the size of the force of the floating turbine body 11 to withstand the large resistance force flowing through the water sufficiently, as shown in θ1 in Fig. 3a toward both sides of the holding member 40 Is widely equipped.

Then, the tapered spring 23 is bent and released in a bent state while acting as a spring to rotate without losing energy to transmit energy.

Most of the parts that are largely subjected to the resistance of the bending force are tapered to cope with the sequential stress through the tapered springs 23 on the thick side so that they can bear strong bending forces, and the remaining long portions are covered by the uniform steel bars 24. .

The upper portion of the fixing member 40, to which the end of the uniform steel bar 24 is fixed, is greatly widened compared to the length of the floating turbine body 11, thereby greatly reducing the angle at which the tapered spring 23 is bent.

The uniform steel bar 24 is mainly subjected to torsion or tensile force rather than bending.

Therefore, the generator 51 generates power by the force of the uniform steel bar 24 having the tensile force and the rotational force, but withstands the tensile force with the thrust bearing provided in the generator 51 and the rotational force of the uniform steel bar 24 is the generator 51. Through it is converted into electrical energy.

The generator 51 is connected to the steel rod support 46 of the fixing member 40 by the generator support 28 as shown in Figure 4c.

The bearing 25 at the end of the uniform steel bar 24 withstands the tensile force by the thrust bearing and allows the rotational force of the uniform steel bar 24 to be idle only without resistance as the axial bearing.

The bearing 25 is connected to and fixed to the steel rod support 46 of the fixing member 40 by the bearing support 29.

In this case, as shown in FIG. 3A, connecting the spring steel rods 21 connected to one side and the other side of the floating turbine body 11 at an angle of θ1 is as described above.

And the fixing member 40 has a fixing wire 42 as shown in Figure 1 to withstand the resistance of the water of the floating turbine body 11, by placing the buried anchor 43 to the lower end of the fixing wire 42 Deeply bury below ground (44).

The buried anchor 43 is made of reinforced concrete, etc. and manufactured to be buried relatively long and deep. The fixing wire 42 is equipped to withstand a plurality of radially resistive force.

Then, as shown in FIG. 3a, the spring steel rods 21 have angles θ1 on the left and right sides of the floating turbine body 11, and if the floating turbine body 11 moves to the right as shown in FIG. If it is not inclined, as shown in the drawing, the water force 33 of the total resistance of the water acts on the floating turbine body 11 in the direction in which the water flows, and the floating turbine body 11 is obliquely perpendicular to the direction in which the water flows. As it lies, the water is combed to the right from above and this force causes a lateral force 34 to be generated to the right.

This force reacts to the floating turbine body 11 so that the reaction force 35 acts to the left.

Then, the floating turbine body 11 is moved to the left to move and the floating turbine body 11, which was originally moved to the right, returns to its original position and has the form of FIG. 3A.

Even if the floating turbine body 11 moves to the left, the principle of restoring again is only the same as above.

That is, even if there is any movement of the floating turbine body 11 to move left and right, it is restored to the floating turbine body 11 of the vertical flow of water will always have a stability.

Therefore, the present invention becomes a floating turbine body 11 perpendicular to the flow of water and stable power generation is always possible.

As shown in FIG. 2d, the floating turbine body 11 bearing the weight of the spring steel bar 21 and floating in the water has a turbine blade 12 concave in the water flow direction 32 when water flows. The water 14 is rotated by the resistance of the water. The kinetic energy of the water is E = 1 / 2mv ² and the energy received on the turbine blades 12 cross-sectional area of the floating turbine body 11 is E = 1 / 2ρAV ³ .

Floating turbine body 11 applying the efficiency is rotated 14 and this force is transmitted to the spring steel bar (21).

Since water has a specific gravity and has a mass of 1000 times per unit volume than air, it is very superior to wind power, but it is not largely developed due to the difficulty of facilities. If power generation facilities are made easy, current and current generation will be able to achieve a lot of power generation.

Small hydroelectric power generation using general streams or rivers generates high power by blocking dams or using water pipes to generate power.However, the power generation efficiency is high. It has been shown to severely destroy the ecosystem and seriously destroy the ecosystem, and is currently rarely used. Therefore, this floating power generation device can prevent damaging the waterway by blocking the dam, and keep the flowing stream and river water as it is, and can make big power generation, replacing the hydroelectric dam power generation and activating and saving the environment. The most eco-friendly and suitable power generation can run a number of power generation facilities with flowing water can achieve a large large-scale power generation as a whole.

The spring steel bar 21 connected to one side of the floating turbine body 11 to endure the tensile force to rotate to transfer energy to the generator 51, the generator 51 produces electricity to transmit power line 52 as shown in Figure 4c Transmit current.

Then, the spring steel bar 21 connected to the other side of the floating turbine body 11 idles and withstands the tensile force.

Power generation in the flowing water of the floating turbine body 11 is as above, the wave energy is generated as shown in Fig. 2e when the wave hits, as shown in Figures 2e and 2f, as shown in Figure 2f.

Since the turbine blades 12 of the floating turbine body 11 are viewed from one side of the side, one side is concave and one side is convex, so if there is movement of water in one direction, the floating turbine body 11 is subjected to rotational force by drag coefficient. , FIG. 2E shows that the left side of the floating turbine body 11 receives a rotational force in a clockwise direction and rotates 14 as shown in the drawing because the wave moves upward from the bottom.

In FIG. 2F, since the wave moves from the top to the bottom, the right side of the floating turbine body 11 receives downward force by the drag coefficient aberration, and also receives a rotational force in a clockwise direction and rotates 14.

In other words, any movement of water other than the parallel movement in the longitudinal direction of the floating turbine body 11 rotates the floating turbine body 11 in the clockwise direction as shown in the drawing, and the spring steel rod 21 is rotated by the force. Will develop.

Even when there is a fluctuation in the water surface as shown in FIG. 4A, the floating turbine body 11 bears the weight of the spring steel rod 21 and always floats in water, thereby stably generating power at any level.

A brake is built in the generator 51, and the brake is operated by reducing the water level with a water level sensor during an emergency or repair, or when the water level is low.

Here, the brake is configured to include a brake drum 110, the brake shoe 120, the servo motor 130, the housing 140, as shown in Figure 6, the brake is a generator 51 The inside of the worm gear case 131 is driven by the brake drum 110 is installed in the fixed steel bar 24 and fixedly connected to the uniform steel bar 24, the power is installed in the brake drum 110 and applied through the electrical power source 133. The worm gear and the worm wheel provided in the controllable control wire 53 is provided so as to operate in engagement with each other, and the servo motor 130 is fixed to the worm wheel shaft 132 to correspond to the driving of the servo motor 130 The roller cam 123 of the “S” shape provided to be rotatable and the diameter change of the roller cam 123 as the shaft diameter is reduced by the expansion diameter and the spring 126 corresponding to the rotation of the brake cam 122 are rotated. Of the brake drum 110 through Is the one to be controlled is composed of a brake shoe 120 is provided equipped with a housing 140, a lower brake lining 121 to be connected to pin 141 on.

The brake is configured as described above is also embedded in the bearing 25, the brake operation is made of the control wire 53, one side and the other side at the same time. For this installation, as shown in FIG. 4B, the wire 47 is connected to the top of the fixing member 40, and the insulator 48 is installed in the middle of the wire 47.

The electric power 133 and the control wire 53 are connected under the insulator 48 to protect the electric power 133 and the control wire 53 from lightning and through the electric power 133 and the control wire 53. Activate the sensor and brake.

The operation of the brake is coupled to the servo motor 130 so that the worm gear and the worm wheel are engaged with each other into the integral worm gear case 131, and the servo motor 130 is operated by the electric power 133 and controlled. It is operated by the wire 53 and can be rotated at a constant speed, angle or force. The worm gear inside the worm gear case 131 rotates and is perpendicular to the worm gear according to the principle applied and operated by the control wire 53. By inducing deceleration with a relatively large number of worm wheels coupled and rotating, a worm wheel having a rotation speed greatly reduced compared to the speed of the servomotor 130 gives a large torque force in inverse proportion to the rotation speed. It is transmitted to the worm wheel shaft 132 is connected to rotate the S brake cam 122, and when the rotation of the servo motor 130 is stopped, the rotation of the worm wheel shaft 132 also stops. The worm wheel shaft 132, which rotates slowly with a torque of up to several tens to 150 times more than the servo motor 130, is connected at right angles to the worm wheel shaft 132 due to the characteristics of the worm gear. This makes it impossible for the worm wheel shaft 132 to rotate in reverse due to the moment from the S brake cam 122 even if the S brake cam 122 receives the rotation moment in any direction. In other words, the speed of the servo motor 130 is significantly slower in proportion to the speed, but the S brake cam 122 rotates with a large moment, but the reverse rotation from the S brake cam 122 is not possible, and thus the brake is maintained with a large force for a long time. Greatly useful for devices that need it.

The insulator 48 can be as shown in FIG. 4D.

An upper portion of the fixing member 40 is equipped with a lightning rod 45 to prevent lightning.

In order to ensure safety by installing a cylindrical buoy 61 as shown in FIGS. 5A and 5B so that a person can escape the floating turbine body 11 in case a float or water flowing in surface water flows. can do.

The cylindrical buoy 61 floats in the water depending on the buoy wire 62 connected to the fixing member 40, and like the floating turbine body 11, the water is perpendicular to the flow of water without being left or right in the flow of water. In front of the floating floating turbine body 11 is stably maintained horizontally to the center of the fixing member (40). Rivers and rivers have no problem because the direction of water flow is constant, and there is no problem in the application of facilities because the sea currents flow in a certain direction throughout the year.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

Floating power generator,

A fixing member 40 provided on the ground or the bottom surface so as to be fixedly spaced apart from each other;

The upper part of any one of the fixing member 40 or the upper part of the other one through the generator support 28 and the bearing support 29 to be coupled to the steel rod support 46 fixedly connected to the fixing member 40, respectively. A generator 51 and a bearing 25 to be installed;

A spring steel rod 20 having one end rotatably provided at the generator 51 and the bearing 25;

By fixedly connecting each other end of the spring steel rods 20 to one surface and the other surface, the spring steel rods 20 are rotated in response to the flow of water while floating in the water so as to generate power in the generator 51. The turbine unit 10 is provided

Floating power generation apparatus comprising a.
The method of claim 1,

In the generator 51 or the bearing 25, the brake for controlling the rotation of the spring steel rod 20 fixedly connected to the turbine unit 10 by reducing the water level with a water level sensor in case of emergency or repair or when the water level is lowered. Floating power generation apparatus characterized in that it is further provided.
The method according to claim 1 or 2,

The turbine portion 10 has a plurality of bolt holes on one side and the other side to be coupled to the steel rod bracket 22 formed at the other end of the spring steel rod 21 of the spring steel rod 20 through a plurality of bolts 26, respectively. (27) is formed, the inner surface of the cylindrical floating turbine body 11, the air tank 13 is formed to be floating therein, and the outer circumferential surface of the floating turbine body 11 to fit the flowing water (river or sea water) Floating power generation apparatus characterized in that consisting of a plurality of turbine blades 12 are provided radially so as to effectively utilize the energy of water (sea water).
The method according to claim 1 or 2,

The spring steel rod 20 has a uniform steel rod 24 having a uniform diameter connected to the generator 51 and the bearing 25, and further extends in one direction from the uniform steel rod 24, and has a gradually enlarged diameter. Tapered spring steel bar 23, and further extends in one direction from the tapered spring steel bar 23, characterized in that the end is formed of a spring steel bar 21 formed with a steel rod bracket 22 to be fixedly connected to the turbine unit 10 Floating power generator.
The method of claim 2,

The brake is driven by a brake drum 110 installed in the generator 51 and fixedly connected to the uniform steel bar 24, and a power installed in the brake drum 110 and applied through the electric power source 133. The worm gear and the worm wheel provided in the worm gear case 131 are fixed to the worm wheel shaft 132 and the servo motor 130 which is provided to be controllable through the control wire 53 so as to be engaged with each other. The brake cam 122 having an “S” shape provided to be rotatable in correspondence with the driving of the motor 130 and the shaft cam is reduced by the diameter and the spring 126 corresponding to the rotation of the brake cam 122. The brake shoe 120 is provided with a brake lining 121 to be connected to the pin 141 at the bottom of the housing 140 so as to control the rotation of the brake drum 110 through the roller diameter 123. Consisting of Floating power generator, made with gong.