JPH0310037B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a wind power generator.

Prior Art A typical conventional technology is represented by a generator that generates electricity by rotating an impeller using wind power. According to such conventional technology, the shaft of the impeller rotates in only one direction due to the wind in one direction, and the input shaft of the generator is fixed to this rotating shaft to generate electricity.

Problems to be Solved by the Invention In the prior art as described above, unless the wind speed is high, it is not possible to obtain electric power having a sufficient generated voltage and desired frequency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive device that solves the above-mentioned problems and can obtain an output with a sufficiently high rotational speed even if the rotational speed of the impeller is low.

Means for Solving the Problems The present invention provides a rotating shaft coaxially provided with at least two impellers that rotate in opposite rotational directions due to wind flowing in one direction, The rotation shaft of one impeller is connected to a ring gear of a planetary gear set arranged on the rotation shaft, the rotation shaft of the other impeller is connected to a support member that rotatably supports the planet gear, and the sun gear is A first coil and a first slip ring connected to the first coil are fixed, and a second coil facing the first coil and a second slip ring connected to the second coil are fixed to the ring gear. A wind power generator characterized in that the wind power generator is fixed, and a brush is provided at the fixed position to contact the first and second slip rings, and excites one of the first and second coils to derive an electromotive force from the other. It is a device.

Function The rotational shaft of one impeller is connected to the ring gear of the planetary gear, the rotational member supporting the planetary gear is connected to the rotational shaft of the other impeller, and the rotational directions of the two impellers are mutually changed. Since the direction is reversed, when the rotational speed of the ring gear is n1 and the rotational speed of the rotating member is n2, the rotational speed n3 of the sun gear is n3=n2+(n2-n1)×z1/z3...(1) , the speed is increased. However, z1 is the number of teeth on the ring gear, and z3 is the number of teeth on the sun gear.

Therefore, even if the rotational speeds of the two impellers are low, it is possible to rotate the sun gear at high speed. In particular, in the present invention, the first coil is fixed to the sun gear and the second coil is fixed to the ring gear, and either one of the first and second coils is excited and an electromotive force is generated from the other. Since the wind speed is derived, an excellent effect is achieved in that an electromotive force can be reliably generated even when the wind speed is low.

Embodiment FIG. 1 is a cross-sectional view of a generator 1 showing the basic configuration of the present invention, FIG. 2 is an enlarged cross-sectional view of the vicinity of the power generation means 2, and FIG. FIG. 4 is a sectional view taken along the cutting plane line - in FIG. 3. The configuration of the generator 1 will be explained with reference to FIGS. 1 to 4. The generator 1 roughly includes a power generation means 2, two sets of impellers 3,
4 are supported by a frame 5, and the rotating shafts 6, 7 of the two sets of impellers 3, 4 and the power generation means 2 are connected via a planetary gear 13. With the above configuration, the two sets of impellers 3 and 4 are rotated by wind power, and electric power is obtained by the power generation means 2. The impeller 3 includes blades 8 having a droplet-shaped cross section perpendicular to the longitudinal direction, and a pair of support rods 9 for supporting the blades 8 on a first rotating shaft 6 extending in the vertical direction.
The blades 8 are supported by a pair of support rods 9 on the first rotation shaft 6 in a longitudinal direction parallel to the axis of the first rotation shaft 6 . The pair of support rods 9 are parallel to each other, perpendicular to the longitudinal direction of the first rotating shaft 6 and the blade 8, and spaced apart from each other by a constant distance. With the above configuration, three sets of blades 8 are attached at equal intervals along the circumferential direction of the first rotating shaft 6.

Like the impeller 3, the impeller 4 also has three sets of blades 10 each having a substantially drop-shaped cross section perpendicular to the longitudinal direction, which are attached to the second rotating shaft 7 by a pair of support rods 11. The mounting direction of the blade 10 is opposite to that of the blade 8, as shown in FIG. Therefore, for example, when receiving wind in the direction indicated by the arrow mark 12, the first rotation shaft 6 rotates clockwise and the second rotation shaft 6 rotates clockwise.
The rotating shaft 7 rotates counterclockwise, and the rotating directions are opposite to each other.

The first rotating shaft 6 and the second rotating shaft 7 are coaxially formed, and bearings 15 and 16 are interposed between them. The bearings 15 and 16 are connected to the first rotating shaft 6 and the second rotating shaft.
It plays the role of smoothly supporting both rotating shafts 6 and 7 against differences in rotational direction and rotational speed with respect to the rotating shaft 7, and maintaining the coaxial relationship.

The second rotating shaft 7 is rotatably held in the frame 5 by bearings 17 and 18. First rotating shaft 6
is the bearing 1 provided near the top of the rotating shaft 6.
9, and as described above, also by the bearings 15 and 16 via the second rotating shaft 7.

The first rotating shaft 6 and the second rotating shaft 7 are connected to an input shaft 20 of the power generating means 2 via a planetary gear device 13 . The first rotation shaft 6 is attached to a second rotation shaft 28 on a mounting member 28 that pivotally supports the planetary gear 21 of the planetary gear device 13.
The rotating shafts 7 are respectively connected to ring gears 22 of the planetary gear set 13, and the input shaft 20 of the power generating means 2 is connected to the sun gear 23. Input shaft 2
0 is formed coaxially with the first rotation shaft 6 and the second rotation shaft 7. A bearing 24 is interposed near the connection between the first rotating shaft 6 and the second rotating shaft 7 and the planetary gear device 13, and a seal is provided to prevent foreign matter such as dust from entering the planetary gear device 13. Means 25 are provided. Further, a bearing 26 is also interposed between the input shaft 20 and the ring gear 22, and smoothly supports the input shaft 20 and the ring gear 22 against differences in rotational direction and rotational speed. A sealing means 27 is also provided near the bearing 26 as described above. As mentioned above,
By using the planetary gear device 13, the first rotating shaft 6, the second rotating shaft 7, and the input shaft 20 can be provided coaxially, and the device can be made smaller and a high speed increasing ratio can be obtained.

An annular brake disk 30 is fixed along the outer wall of the ring gear 22 of the planetary gear device 13, and a pair of brake shoes 31 are provided on the upper and lower surfaces of the brake disk 30 so as to be able to squeeze the brake disk 30. . The brake shoe 31 compresses the brake disc 30 using, for example, a hydraulic cylinder 32 or the like. Thereby, rotation of the ring gear 22 can be suppressed. As described above, the brake shoe 31 and the hydraulic cylinder 32 operate the first
It constitutes a control means 33.

In the power generating means 2, one open end of a cylindrical casing 36 is fixed to a grave stand 35, and the other open end is sealed by an end plate 37, and the base 3
5 is fixed to the frame body 5. The input shaft 20 is inserted through the center of the casing 36, and the input shaft 20
has a rotor 38 around which a coil is wound. A stator 39 made of an electromagnetic coil is provided along the inner surface of the casing 36 . The input shaft 20 is supported by a base 35 and an end plate 37 via bearings 40 and 41 so as to be rotatable about its axis.

The power generation means 2 of this embodiment may be an induction generator or a synchronous generator, and when it is an induction generator, both ends of the coil wound around the rotor 38 are connected to each other, and the stator 39 Induced electromotive force can be derived from the electromagnetic coil.

The input shaft 20 is provided to protrude outward from the end plate 37, and an annular brake disc 42 is fixed to the protrusion, and the above-mentioned first control means 3
3, a second control means 45 is provided from a brake shoe 43 and a hydraulic cylinder 44. First control means 33 and second control means 45
is fixed to the frame 5.

By braking by the first control means 33, when the impellers 3 and 4 rotate at too high a speed, the sun gear 23 is prevented from rotating at an abnormally high speed, and the rotation of the ring gear 22 is suppressed. Can be done. Furthermore, when no electricity is generated, the first braking means 33 and the second braking means 45 prevent the ring gear 22 and the sun gear 23 from rotating.

With the above configuration, even if the rotational speed of the impellers 3 and 4 is low relative to the wind in the direction of arrow 12, for example,
By using the planetary gear device 13, a high rotational speed can be obtained for the input shaft 20, making it possible to generate electricity.

In the above configuration, the first rotating shaft 6 and the second
The rotating shaft 7 connects to the input shaft 2 via a planetary gear device 13.
0, the planetary gear device 13 may be a planetary roller device 50 as shown in FIG. The planetary roller device 50 is the planetary gear device 1
3 uses rollers in place of each gear, and a planetary roller 52 and a sun roller 5 are installed inside the ring roller 51.
3, the planetary gear device 1
Higher speed rotation, lower noise, lower vibration, higher rotation accuracy, etc. can be obtained than 3.

FIG. 6 is a simplified block diagram of the generator 1a showing another configuration that is the basis of the present invention. This configuration is similar to the previously described configuration, and corresponding parts are given the same reference numerals. Generator 1a in this configuration
A second power generation means 2a is provided in series with the power generation means 2, and the input shaft 20 of the power generation means 2 and the input shaft 20a of the power generation means 2a are connected via a centrifugal clutch 55. When the rotational speed of the input shaft 20 exceeds a predetermined rotational speed, the centrifugal clutch 55 becomes connected so that rotational drive is transmitted to the input shaft 20a of the second power generation means 2a,
When the rotational speed of the input shaft 20 is less than a predetermined rotational speed, the centrifugal clutch 55 is in a disengaged state. In this way, when the rotational speeds of the first rotating shaft 6 and the second rotating shaft 7 are relatively high, a plurality of power generation means can be continuously provided.

FIG. 7 is an enlarged sectional view of one embodiment of the present invention. This embodiment is similar to the first embodiment, and corresponding parts are given the same reference numerals. Similarly to the first embodiment, the first rotating shaft 6 is connected to the planetary gear 21 of the planetary gear device 13a.
The second rotating shaft 7 is connected to the ring gear 22a of the planetary gear device 13a, respectively, to the mounting member 28 which pivotally supports the second rotating shaft 7. The sun gear 23 has a power generation means 6
The input shaft 62 of the first rotor 61 of No. 0 is connected to the ring gear 22a, and the input shaft 64 of the second rotor 63 of the power generating means 60 is connected to the ring gear 22a.

The input shaft 62 and the input shaft 64 are the first rotating shaft 6
and the second rotating shaft 7, and are rotatable about the axis, and the rotation directions are selected to be opposite to each other. Furthermore, bearings 65 and 66 are interposed between the input shaft 62 and the input shaft 64. These bearings 65 and 66 are connected to the input shaft 62 and the input shaft 6.
It plays a role of smoothly supporting both the input shafts 62 and 64 and maintaining the coaxial relationship despite differences in rotational direction and rotational speed. The input shaft 64 of the second rotor 63 is connected to the base 70 by a bearing 67.
The input shaft 62 of the first rotor 61 is held on the base 70 via the input shaft 64 of the second rotor by bearings 65 and 66, as described above.

The power generation means 60 has one open end of a cylindrical casing 71 fixed to a base 70, and the other open end sealed by an end plate 72.
is fixed to the frame 5. The input shafts 62 and 64 are inserted into the casing 71. A plurality of coils 75 are provided on the outer peripheral surface of the input shaft 62 of the first rotor 61 along the circumferential direction. The second rotor 63 is formed in a cylindrical shape, and a coil 76 is provided on the inner circumferential surface of the second rotor 63 in a position facing the coil 75 provided with the input shaft 62 along the circumferential direction.

A slip ring 7 is used to electrically connect the coils 75 and 76 to a cable (not shown).
7 and 78 are provided, and brushes 79 and 80 are in sliding contact with each other. These coils 75, 76 and the slip ring 7
7 and 78 are electrically connected by a configuration not shown. A disc-shaped insulator 81,
82 is interposed.

A direct current is applied to the coil 75 from a cable (not shown) via a brush 79 and a slip ring 77.
given to. As a result, an induced electromotive force is generated in the coil 76 magnetically coupled to the coil 75, and the electromotive force can be derived via the slip ring 78 and the brush 80.

As in the first embodiment, the planetary gear device 13a and the input shaft 62 of the first rotor 61 each have a first
A control means 33 and a second control means 45 are provided and fixed to the frame 5.

As described above, as shown in this example, the first
By making the rotor 61 and the second rotor 63 rotatable in mutually opposite directions, the relative speed of the input shaft 62 with respect to the input shaft 64 is improved, compared to the case of the first embodiment. Even with the same wind speed, it is possible to further improve power generation efficiency.

Effects As described above, according to the present invention, the planetary gear unit is connected to at least two rotating shafts that rotate in opposite directions to each other, and the rotational power of the sun gear of the planetary gear unit is output. Even if the velocity of the fluid flowing in one direction is insufficient, an output with a sufficiently high rotational speed can be obtained. In particular, in the present invention, the first coil is fixed to the first sun gear,
A second coil is fixed to the ring gear, and these first and second coils are connected to an external electric circuit by first and second slip rings and brushes, and the first and second coils are connected to an external electric circuit by means of first and second slip rings and brushes. Since one of the coils is excited and the electromotive force is derived from the other, an excellent effect is achieved in that the relative speed between the first coil and the second coil can be further improved.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a generator 1 showing the basic structure of the present invention, FIG. 2 is an enlarged sectional view of the vicinity of the power generation means 2, FIG. 3 is a perspective view of the vicinity of the rotating part of the generator 1, and FIG. 4 is a sectional view taken from the cutting plane line - in FIG. 3, FIG. 5 is a plan view of the planetary roller device 50, and FIG. 6 is a simplified diagram of another generator 1a showing the basic configuration of the present invention. The block diagram shown in FIG. 7 is an enlarged sectional view of one embodiment of the present invention. 1, 1a... Generator, 3, 4... Impeller, 6...
...First rotating shaft, 7... Second rotating shaft, 13, 13a
...Planetary gear system, 20, 20a, 62, 64...
...Input shaft, 21...Planetary gear, 22, 22a...
Ring gear, 23...Sun gear, 50... Planetary roller device.

Claims (1)

[Scope of Claims] 1. A rotating shaft having at least two impellers that rotate in opposite rotational directions due to wind passing in one direction is coaxially provided, and these impellers are arranged on the rotating shaft. The rotation shaft of one impeller is connected to a ring gear of the planetary gear device, the rotation shaft of the other impeller is connected to a support member that rotatably supports the planet gear, and the sun gear has a first coil; A first slip ring connected to the first coil is fixed, a second coil facing the first coil and a second slip ring connected to the second coil are fixed to the ring gear, and the ring gear is fixed at a fixed position. A wind power generation device characterized in that a brush is provided in contact with the first and second slip rings, and one of the first and second coils is excited to derive an electromotive force from the other.