JPS6246702B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wind power generation device that generates electricity using wind power, and is most suitable as a small-scale power source for strong wind alarms, wind advertising devices, and the like.

Conventional generators that utilize wind power are generally known, but most of them simply transmit the rotation of the windmill to the generator, so the amount of power generated is directly influenced by the magnitude of the wind power, and the amount of power generated does not reach a certain level. It had a serious defect in that it was not possible to obtain a specific voltage.

In the present invention, upper and lower rigid wind turbines that rotate in opposite directions are coaxially arranged, and the output shaft of the upper wind turbine is the center axis, and the output shaft of the lower wind turbine is the outer axis. Either of the two output shafts is connected to the power generation rotor or stator, and a plurality of centrifugal drive bodies are centrifugally driven at different rotational speeds of the center shaft, and the centrifugal drive bodies are connected to the outer shaft and drive each of the center shafts. This is a wind power generation device provided with a brake member consisting of a brake body that comes into contact when the rotation speed is higher than a different predetermined number of rotations, and has the following objects.

The first objective of the present invention is to make it possible to obtain a high amount of power generation even when wind power is small by making the upper and lower wind turbines rotate in opposite directions and connecting each to the rotor or stator of a generator. .

A second object of the present invention is to provide a brake member between the output shafts of both the upper and lower wind turbines to suppress the number of rotations of the wind turbines and to keep the voltage generated by the generator almost constant even at high wind speeds.

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment, a centrifugal weight is used as the centrifugal drive body, and a brake drum is used as the brake body.

Reference numeral 1 designates an upper windmill, which is a rigid type, for example, a Savonius type windmill, and includes a blade portion 11 and upper and lower end plates 12 and 13.
The output shaft 2 is fixed to the end plates 12 and 13.

3 is a lower windmill, and like the upper windmill 1, it is a solid-shaped windmill like Savonius type, and the blade part 31
is provided in the opposite direction to the upper stage wind turbine 1, and the upper and lower end plates 32, 33 are fixed to the output shaft 4.

These output shafts 2 and 4 are rotatably fitted to each other with the output shaft 2 of the upper stage wind turbine 1 as the center shaft and the output shaft 4 of the lower stage wind turbine 3 as the outer shaft, and a generator 5 installed below the wind turbines 1 and 3. The rotor 51 and stator 52 are connected to each other.

Since the wind turbines 1 and 3 rotate in opposite directions due to wind energy, the rotor 51 connected to the output shaft 2 and the stator 52 connected to the output shaft 4 rotate in opposite directions, and their relative speeds increase. As a result, the generator 5 rotates at an increased speed to obtain a high amount of power generation.

Reference numeral 6 is connected to the output shaft 2, and two types of large and small centrifugal weights 61, 62 and coil springs 612, 622 and these centrifugal weights 61, 62 are connected to the output shaft 2 and are provided in upper and lower stages.
62 is a brake member consisting of a brake drum 63 that is in contact with and fixed to the output shaft 4, and the wind energy is excessively high above the rated wind speed (wind speed 20 m/sec), causing both the upper and lower wind turbines 1 and 2 to rotate at excessive speeds. It is activated when this occurs, and suppresses the rotational speed of both windmills 1 and 2.

Both centrifugal weights 61 and 62 are partial weights 61 and 62 each having a shape obtained by cutting out a part of a hollow cylinder with a predetermined thickness.
1, 61-2, 62-1, 62-2 are placed opposite each other, and each partial weight 61-1, 61-
Holes 614, 624 that penetrate vertically are provided at eccentric positions of 2, 62-1, 62-2, and these holes 614, 6
The eccentric shafts 7 and 8 are inserted into 24 and loosely engaged.

The upper and lower parts of the eccentric shafts 7 and 8 are fixed to a fixed disc 10 which is fixed to the upper and lower flange parts 91 and 92 of the mounting tube 9. Since the mounting tube 9 is also fixed to the output shaft 2 of the upper wind turbine 1, the mounting tube 9 and the fixed disk 10 also rotate with the rotation of the upper wind turbine 1, and the eccentric shafts 7, 8
This rotational driving force is transmitted to centrifugal weights 61 and 62 via
is transmitted to give centrifugal force to these weights 61 and 62.

Partial weights 61-1, 6 of large centrifugal weight 61
1-2 is a partial weight 62 of the small centrifugal weight 62
-1 and 62-2, and in the illustrated embodiment, the weight is determined by having the same shape and varying thickness.

In addition, the centrifugal weights 61 and 62 have a large centrifugal weight 61 on the upper side and a small centrifugal weight 62 on the lower side.
2-1, the outermost layer of 62-2, that is, the brake drum 6
Brake shoes 613, 623 are provided on the third side, and annular grooves 611, 612 are provided in the middle part of the outermost layer.
are formed, and endless annular coil springs 612, 622 are housed within these grooves 611, 612.

Therefore, each two partial weights 61-1, 61
-2,62-1,62-2 is this spring 612,
Due to the elasticity of the output shaft 622, a force is constantly applied to the output shaft 2 side, and a stopper 64 provided on the output shaft 2 holds the output shaft 2 in a fixed position when the output shaft 2 does not rotate or rotates only slightly. When the wind speed exceeds a certain level, partial weights 61-1, 61-2, 62-1, 62
When the centrifugal force applied to the eccentric shafts 7 and 8 exceeds a predetermined value, the opposite side of the eccentric shafts 7 and 8 overcomes the force of the springs 612 and 622 and protrudes outward, eventually coming into contact with the brake drum 63. This provides a suppressing effect on the rotation of the output shafts 2 and 4. Also, when the rotational speed of both the upper and lower wind turbines 1 and 3 decreases, the force of the springs 612 and 622 causes the respective partial weights 61-1, 61-2, 62-1, 62-2 to decrease.
moves inward, and when it reaches a small number of rotations, it comes into contact with the stopper 64, which is the same as when the rotation is stopped.

It should be noted that the vertical positions of the large and small centrifugal weights 61 and 62 may be opposite to the illustrated example, or the stoppers 64
If made of a light material or made small in shape, the partial weights 61-1, 61-2, 62-1, 62-
Of course, it may be provided on the second side.

In the drawing, 14 is a large centrifugal weight, and small centrifugal weights 61 and 62.
Upper and lower weights 61-1, 61-2, 62-
A spacer 15 separates the fixed disk 10 from the fixed disc 1, 62-2, and a frame body rotatably supports the output shafts 2 and 4 by upper and lower bearings 16 and 17, and is fixed to the generator main body 18. . Reference numeral 19 denotes a bearing that rotatably supports the generator 20 on the generator main body 18.

Although the blade portions 11 and 31 are not specifically shown in the drawings, the blades of the upper and lower wind turbines 1 and 3 are oriented in opposite directions to rotate in opposite directions.

Next, to explain the operation of the embodiment of the present invention, when wind energy is applied to the wind turbines 1 and 3, for example, the upper wind turbine 1 rotates clockwise (clockwise), and the lower wind turbine 3 rotates counterclockwise (counterclockwise). direction). Therefore, since the output shafts 2 and 4 of the wind turbines 1 and 3 also rotate in opposite directions, the rotor 51 and stator 52 connected to the shafts 2 and 4 also rotate in opposite directions, and their relative speeds cause the generator to 5 can be increased.

Furthermore, when the wind energy (wind speed) becomes excessive, the rotation speed of the output shaft 2 increases, and the large centrifugal weight 61 and small centrifugal weight 62 that are linked to this increase the centrifugal force against the coin springs 612 and 622. As a result, the brake shoe 623 of the small centrifugal weight 62 first contacts the brake drum 63 fixed to the output shaft 4 and brakes the rotation of the windmills 1 and 3. This state is the point P1 shown in FIG. ₄ , and as the wind speed U increases further and the rotational speed N of the upper wind turbine 1 increases, the brake shoe 613 of the large centrifugal weight 61 contacts the brake drum 63 and points. _P2
The rotational speed of the wind turbines 1 and 3 is suppressed as shown in FIG. A nearly constant voltage can be obtained.

In the present invention, upper and lower rigid wind turbines that rotate in opposite directions are coaxially arranged, and the output shaft of the upper wind turbine is the center axis, and the output shaft of the lower wind turbine is the outer axis. Either of the two output shafts is connected to the rotor or stator of the generator, and a plurality of centrifugal drive bodies are connected to the center shaft and centrifugally driven at different rotational speeds, and a plurality of centrifugal drive bodies are connected to the outer shaft and are driven centrifugally at different rotation speeds of the center shaft. This wind power generation device is provided with a brake member consisting of a brake body that comes into contact when the rotation speed is higher than a different predetermined number of rotations, and has the following effects.

That is, in the present invention, the output shaft of the upper stage wind turbine and the output shaft of the lower stage wind turbine rotating in the opposite direction are respectively connected to the rotor or stator of the generator. It is possible to increase the amount of power generated, and it is possible to obtain a high amount of power generated even with a small amount of wind energy.

Further, the present invention provides a plurality of centrifugal drive bodies that are centrifugally driven at different rotational speeds of the middle shaft, that is, the upper stage wind turbine output shaft, and connected to the outer shaft, that is, the lower stage wind turbine output shaft, and the centrifugal drive bodies are connected to each other, and that the centrifugal drive bodies are driven centrifugally at different rotation speeds of the middle shaft, that is, the upper stage wind turbine output shaft. Since the system is equipped with a brake member consisting of a brake body that comes into contact in the above situations, even if the wind energy becomes excessive, the rotational speed of both wind turbines will not become excessive and the voltage generated by the generator will be kept almost constant. be able to.

[Brief explanation of the drawing]

The drawings show one embodiment of the wind power generation device of the present invention, and FIG. 1 is a schematic diagram of its configuration, FIG. 2 is a plan configuration diagram showing a brake member, and FIG. 3 is a cross-sectional view taken along the line - in FIG. 2. 4 are generated voltage characteristic diagrams. 1... upper stage wind turbine, 2... upper stage wind turbine exit shaft,
3...lower windmill, 4...output shaft of lower windmill, 5
... Generator, 6 ... Brake member, 61 ... Large centrifugal weight, 62 ... Small centrifugal weight, 63 ...
brake drum.

Claims (1)

[Scope of Claims] 1. Two stages of rigid wind turbines, upper and lower, which rotate in opposite directions to each other, are coaxially arranged, and are rotatably fitted to each other with the output shaft of the upper stage wind turbine serving as the center axis and the output shaft of the lower stage wind turbine serving as the outer axis. In addition, one of the two output shafts is connected to the rotor or stator of the generator, and a plurality of centrifugal drive bodies are centrifugally driven at different rotation speeds of the center shaft, and the centrifugal drive body is connected to the outer shaft. A wind power generator is provided with a brake member comprising a brake body that comes into contact when the center shaft rotates at different predetermined rotational speeds or higher. 2. As a brake member, a centrifugal weight is used for the centrifugal drive body and a brake drum is used for the brake body, and a small centrifugal weight that comes into contact with the brake drum when the output shaft of the upper stage wind turbine exceeds a predetermined rotation speed, and the small centrifugal weight is attached to the brake drum. A large centrifugal weight that contacts the brake drum when the output shaft of the upper wind turbine reaches a rotation speed higher than the rotation speed of the upper wind turbine, and a large centrifugal weight that is connected to the lower wind turbine and contacts the small centrifugal weight and the large centrifugal weight. 2. The wind power generation device according to claim 1, comprising a wind turbine and a brake drum for controlling the rotation speed of the lower wind turbine.