KR100935713B1

KR100935713B1 - Wind power generator

Info

Publication number: KR100935713B1
Application number: KR1020090067534A
Authority: KR
Inventors: 김희구
Original assignee: 김희구
Priority date: 2009-07-23
Filing date: 2009-07-23
Publication date: 2010-01-08

Abstract

According to the present invention, the magnetic force-induced helical wind generator with reduced frictional force is provided with a rotating shaft rotatably installed by vertical support means perpendicular to the support frame, and by inducing the rotating shaft by the magnetic force to minimize frictional resistance to rotation. Axial thrust reduction means,

Blades formed integrally on both sides opposed to each other with respect to the rotation axis and having an arc-shaped air guide portion inwardly and twisted at a predetermined angle from the upper side to the lower side, and the support frame and the rotating shaft or the ends of the blade It is provided with a speed control means for controlling the speed of the rotating shaft by a magnetic force. Wind generator of the present invention can minimize the rotational resistance of the rotating shaft, it can be prevented from rotating at a high speed by strong winds.

Description

Magnetically driven floating helical wind generator with reduced friction

The present invention relates to a wind power generator, and more particularly, to a magnetic force floating-type helical wind generator that reduces the frictional resistance due to the axial thrust force of the rotating shaft and reduces the frictional force capable of controlling the rotational speed by the magnetic force.

In general, a wind power generator is a device that can generate electricity by using wind, which is a clean energy source. In addition to the socio-environmental aspects of global environmental protection, the economics of reducing supply dependence and reducing dependence on energy imports can be achieved. In particular, in recent years, the government has been able to purchase electricity produced by private companies, thus accelerating wind power distribution.

An example of such a wind generator is disclosed in US No 5 770 909, which discloses a technical configuration in which the power generated by the generator is optimized for all operating conditions according to the rotational speed of the RPM.

"Wind generator" is disclosed in Korean Patent Application No. 2002-30509 (May 51, 2002). The wind turbine and the blade is rotated by the wind; A main shaft coupled to the blade and rotating integrally with the blade; A generator in which the main shaft and one end of the shaft of the rotor are coaxially connected so that the rotor rotates by the rotation of the main shaft to generate electric power; A drive motor connected to a shaft of the rotor coaxially with the other end of the generator rotor to rotate the blade via the rotor and the main shaft of the generator; And a control panel which drives the driving motor during initial startup of the blade and stops the driving of the driving motor when the blade reaches a predetermined rotation speed.

However, such a wind turbine has a fixed impeller so that the direction of the wind does not respond to the change, there is a weak local wind.

Korean Patent Application No. 2002-30140 (May 30, 2002) discloses a hollow semi-circular shaped vertical axis wind turbine with ventilation grooves. However, the hollow semi-circular vertical shaft wind turbine blade with the ventilation groove is also fixed to the impeller does not correspond to the direction of the wind, there is a weak problem in local gusts.

The wind turbines introduced in Korean Utility Model Nos. 279086, 271719, and 268957 also suffer from the above-mentioned problems. Korean Patent Application No. 2001-81017 (December 19, 2001) stated that "Rotating vanes for vertical shaft wind generators Angle conversion device "is introduced.

The angle conversion device of the rotor blade for the vertical wind turbine generator is difficult to generate sufficient power due to the small size of the rotor blade, and is provided with a means for blocking the moment index exceeds the allowable range due to strong winds such as local gusts. not.

The present inventors have developed and registered (patent registration No. 0853350, 2008. 08. 13) of a screw type vertical wind generator in view of the problems of the conventional wind generator as described above, and continuously developed and applied for this wind generator It came to the following.

The present invention is to solve the above problems, the present invention can reduce the resistance due to the axial thrust acting on the rotating shaft, reducing the friction force that can promote the safety of electrical power by adjusting the speed of the rotating shaft for power generation Its purpose is to provide a self-supporting helical wind generator.

The magnetic force floating form helical wind generator to reduce the frictional force of the present invention for achieving the above object is a rotational shaft installed by the vertical support means perpendicular to the support frame, and the frictional resistance according to the rotation of the rotational shaft by floating the rotational shaft by the magnetic force Axial thrust reduction means to minimize the

Screw-shaped blades integrally formed on both sides opposed to each other about the rotation axis and twisted at a predetermined angle in a vertical direction having an arc-shaped air guide inwardly;

It is characterized in that it is provided at the end of the support frame and the rotating shaft or blade provided with a speed control means for controlling the speed of the rotating shaft by a magnetic force.

In the present invention, the axial thrust reduction means is provided with a magnetic pole such as a first fixed magnet unit of the conical first sub-box unit installed on the rotating shaft, and the first fixed magnet unit is installed on the support frame to surround the first sub-box unit at a predetermined interval And floating means for floating the rotating shaft.

The speed control means includes a rotating member having a magnetic pole having a magnetic pole installed at the end of the braid, an electromagnet unit which is installed to be spaced apart from the rotating member by a predetermined interval and generates the same magnetic pole as the magnetic pole of the rotating member; And a rotation speed detection sensor installed adjacent to the rotation shaft to detect the rotation speed, and comparing the rotation speed detected by the rotation speed detection sensor with a set rotation speed to selectively supply power to the electromagnet unit for speed control. It is provided with a control unit for controlling.

The magnetically driven floating helical wind generator with reduced friction according to the present invention configured as described above can minimize the resistance generated during rotation, and can produce stable energy even under rapid changes in wind direction and wind speed, and the blade is twisted into a screw shape. By doubling the utilization of wind power, the rotational resistance of the blade is reduced to maximize the power generation efficiency.

Magnetically driven floating helical wind power generator with reduced frictional force according to the present invention is obtained by using a screw-type blade to obtain a rotational force, it can be generated by using the rotational force, an embodiment thereof is shown in Figures 1 to 3. .

Referring to the drawings, the magnetic force sub-helical helical wind generator 10 is reduced frictional force according to the present invention is a rotating shaft 12 is installed by a bearing (not shown) vertically and vertically supporting means to the support frame 11, Shaft thrust reduction means 20 which can minimize the frictional resistance to the rotation by floating the rotating shaft, and integrally formed on both sides facing each other around the rotating shaft 12 and arc-shaped air guide portion 31 inward Blades 30 formed in a screw shape in a twisted state at a predetermined angle from the upper side to the lower side having a and is installed at the end of the support frame and the rotating shaft or blade 30 to control the speed of the rotating shaft 12 by magnetic force It is provided with a speed control means 40 for.

The support frame 10 is supported on the ground and installed vertically, it may be made of a steel structure of a predetermined height or may be made of a lattice structure surrounding the blade.

The rotating shaft 12 may be supported by bearings installed at upper and lower portions of the support frame 11 installed vertically, but not supported by the bearings, and may be supported by the shaft thrust reduction means 20. . Herein, the bearing may be a journal bearing, a thrust bearing, or an air bearing.

The axial thrust reduction means 20 includes an upper axial thrust reduction portion 21 installed on the lower side of the rotary shaft and a lower axial thrust reduction portion 25 installed on the upper side.

The upper axial thrust reduction unit 21 is installed on the rotating shaft and the upper or lower portion of the first rotating magnet member 22 having a single magnetic pole, and is installed on the support frame having the same pole as the first rotating magnet A first fixed magnet member 23 is provided.

The lower axial thrust reduction unit 25 is installed on the rotating shaft and the upper or lower portion of the second rotating magnet member 26 having a single magnetic pole, and installed on the support frame having the same pole as the first rotating magnet A second fixed magnet member 27 is provided. Here, the first and second rotating magnet members are formed in a truncated cone shape on the outer circumferential surface, and the first and second fixed magnet members maintain the first and second rotating magnet members 22 and 26 at predetermined intervals, respectively. It has a tapered inlet groove so that it can be wrapped. The first and second fixed magnet members 23 and 27 may be made of an electromagnet, and the first and second rotating magnet members and the first and second fixed magnet members may be made of a disk type.

In particular, the second rotating magnet member 26 of the lower shaft thrust reduction portion 25 is installed along the end trajectory of the blade, the second fixed magnetic member 27 has a semi-circular shape with the same trajectory as the end trajectory of the blade Magnet members 27a have a structure arranged radially. The magnet member may be supported by a separate frame.

The blade 30 installed on the rotating shaft 11 is installed to be opposed to the rotating shaft 12, and the blade 30 has an air guide part 31 formed therein so that wind can pass inward. It is formed in a screw shape in a twisted state at a predetermined angle from the lower side to the upper side. In addition, the blade 30 is formed so that the center of gravity is located in the rotary shaft 12 to the outer end from the rotary shaft 12 to a thinner thickness to a certain thickness so as to damage the blade 30 by the wind during rotation and In addition to preventing damage and smooth rotation, efficient power generation is possible, wherein the twist angle of the blade 30 is preferably 180 ° to 270 °, which effectively responds to the wind direction and the wind speed, thereby generating power generation efficiency for the same time. Looking at the rotational speed according to the torsion angle of the blade 30, it can be seen that the angle of the rotary blade is 39 times for 180 degrees, 40 times for 270 degrees in the wind of 40m / s, which is the blade It can be seen that the variation of the speed according to the torsion angle of is similar, and also the analysis safety factor (yield stress / blade according to the torsion angle of the blade 30). Stress), the analysis safety factor is 1.6 (30 / 18.66451) when the angle of the blade 30 is 180 degrees, and the analysis safety factor is 1.5 (30 / 20.61021) when 225 degrees, and 270 degrees as shown in FIG. 3C. The analysis safety factor was 1.2 (30 / 25.25912).

Naturally, the above-described blade 30 may be formed in various shapes according to the installation area. The blade 30 may be formed in a stable shape having a support for additional reinforcement or a balance between one side and the other side, and two or more blades. It can be installed at such intervals.

The speed control means 40 is installed at the end of the blade 30 to maintain a constant rotational speed, is installed on the lower end of each blade 30, the rotating member 41 having a single magnetic pole on the lower surface And an electromagnet unit 42 installed corresponding to the rotating member 41 and capable of generating the same magnetic pole or different magnetic poles as the lower end magnetic pole of the rotary member 41. Here, the electromagnet unit has a unit electromagnet member 42a arranged radially with the same trajectory as the end of the blade as described above. And it may be made of the rotating member 41 or an electromagnet, in this case, a rotary joint for supplying a separate power to the electromagnet constituting the rotating member 41 may be installed.

The rotational speed 12 and the rotational speed detected by the rotational speed sensor 43 and the rotational speed sensor 43 for measuring the rotational speed of the rotational shaft 12 are compared with the set rotational speed. The control unit 44 for selectively controlling the supply of power to the electromagnet unit 42 for the speed control. The rotation speed detection sensor may be a high frequency oscillation type proximity switch, but is not limited thereto.

The controller 44 may apply a different magnetic pole or the same magnetic pole to the electromagnet unit by comparing the rotational speed with the set rotational speed so as to control the supply of power for generating magnetic force to the electromagnet unit according to the wind speed. Make sure

On the other hand, the rotating shaft is connected to the generator, it can be connected through an accelerator for rotating the generator at a corrected number of revolutions, as shown in Figure 4 may be installed in the lamppost of the street lamp can supply electricity to the lamp installed in the lamp have.

When the wind generator according to the present invention configured as described above is exposed to the wind, the wind is collected by the air guide portion 31 which is the inner side of the blade 30 is guided along the twisted angle to rotate the blade 30.

As the blade 30 is rotated as described above, the rotating shaft 12 is supported by the axial thrust reduction means 20, thereby minimizing frictional resistance due to rotation. That is, the first and second rotating magnet members 22 and 26 are installed on the rotating shaft, and the first and second fixed magnet members 23 and 27 are installed on the side spaced apart from the predetermined intervals by the magnetic force. 12) can be injured to minimize the axial thrust. That is, since the same magnetic pole is applied to each of the second rotating magnet member 26 and the second fixed magnet member 27, the repulsive force acts on each other to cause the shaft to float. The first fixed magnet member 23 installed on the lower side of the first rotating magnet member installed on the upper part of the rotating shaft 12 is applied with the same poles to raise the rotating shaft 12 so that the rotating shaft 12 It is possible to reduce the generation of axial thrust acting on the load by the rotational force of the blade. In particular, when the same magnetic pole is applied to the rotating member of the rotational speed control means 40 and the opposing sides of the electromagnet unit, the shaft is floated as described above, thereby reducing the rotational resistance of the rotational shaft 12. It allows the blades to rotate even if there is not much wind.

When the wind speed and the wind speed are relatively high due to the strong wind, when the blade 30, that is, the rotating shaft 12 is rotated more than the rated rotation speed, the rotation speed is detected by the rotation speed detecting means 43, the rotation The rotational speed detected by the water detecting means 43 and the preset rotational speed are compared to the control unit 44 to selectively apply power to the electromagnet unit 42 to supply the rotating member 41 and the electromagnet unit 42. The rotational speed is adjusted by allowing the magnetic poles with different poles to be drawn to each other. Therefore, it is possible to drive the generator stably, it can be a stable power generation. In particular, since the electromagnet unit 42 has the same trajectory as the rotating member 41 made of a magnet and is radially formed, it is possible to prevent the pulsation of the control force from occurring during speed control.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The magnetically-driven helical wind generator that reduces the frictional force of the present invention is widely applicable to a generator installed in the mountainous islands or the lamppost of a street lamp.

1 is a perspective view of a magnetic force floating helical wind generator with reduced friction according to the present invention,

Figure 2 is an exploded perspective view of the magnetic force floating helical wind generator with reduced friction according to the present invention,

3 is a perspective view of a speed control means according to the present invention;

Figure 4 is a perspective view showing a state in which a magnetically driven floating helical wind generator is reduced to the friction force according to the present invention installed on a street lamp.

Claims

A rotating shaft installed by the upper and lower supporting means perpendicular to the support frame, and an axial thrust reduction means capable of minimizing frictional resistance to rotation by floating the rotating shaft;

Blades formed integrally on both sides opposed to each other with respect to the rotation axis and formed in a screw shape in a twisted state at an angle from the upper side to the lower side having an arc-shaped air guide inwardly,

And a speed control means for controlling the speed of the rotating shaft by magnetic force provided at the end of the support frame and the rotating shaft or blade.

The method of claim 1,

The shaft thrust reduction means has a conical first sub-box unit installed on the rotating shaft, and a pole which is installed on the support frame and surrounds the first sub-box unit to surround the first sub-box unit so as to be spaced apart by a predetermined distance, and which floats the rotating shaft. A magnetic force floating helical wind generator with reduced friction, characterized in that it is provided with a fixed magnet unit.

The method of claim 1,

The speed control means may be provided with a rotating member having a magnetic pole installed at the end of the braid and a magnetic pole spaced apart from the rotating member by a predetermined interval to generate the same magnetic pole or different magnetic poles as that of the rotating member. An electromagnet unit, which is installed adjacent to the rotating shaft, detects the rotational speed, and compares the rotational speed detected by the rotational speed sensor with a set rotational speed, thereby selecting the speed of the electromagnet unit for speed control. The magnetic force floating helical wind generator is reduced frictional force, characterized in that the control unit for intermittent supply of power.

The method of claim 3, wherein

The rotating member is formed at the end of the braid with the same trajectory as the trace of the braid, and the electromagnet unit has the same trajectory as the rotating trace and has a unit electromagnet member arranged radially around the rotation axis. Reduced magnetic flotation helical wind generator.