JPS58214036A - Flywheel device - Google Patents

Abstract

PURPOSE:To improve energy efficiency of a device and increase a life of a bearing, by arranging a dynamotor, flywheel, bearings, etc. in a completely sealed vacuum vessel blocked from the outside air further forming one of the bearings to a magnetic bearing and the other to a pivot bearing. CONSTITUTION:A minor contour vessel 3 and a major contour vessel 4 constituting a completely sealed vacuum vessel 1 are mutually communicated, and an upper wall 3a and a bottom wall 4a are also closed completely from the outside. Then the bottom end of a rotary shaft 12 of a flywheel 11 is supported to a pivot bearing 23, while the upper end is supported to a magnetic bearing 19 of contactless type. Further an electromagnet 16 loading the weight of the flywheel 11 is arranged to the upper of the flywheel 11. By such constitution, weight of the flywheel 11 and a rotor 7 of a dynamotor 5 is attracted by the electromagnet 16, and thrust force acting on the pivot bearing 23 is reduced then its life is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flywheel device that converts electrical energy into seven-wheel rotational inertia energy, stores the energy, and releases it as electrical energy again when necessary.

Conventionally, there has been a device of this type as shown in FIG.

In FIG. 1, a container (1) is divided into a small diameter container (8) and a large diameter container (4) separated vertically by a partition wall (2).
Inside the small diameter container (8) is a generator motor (
6) is provided. This generator motor (5) includes a stator attached to the inner circumferential surface of the small diameter container (8), and a rotor (7) arranged to face the stator (6).
In other words, the upper end of the rotating shaft (8) of this rotor (7) is supported by a υ bearing (9), which is a roller provided on the earthen wall (3a) of the small diameter container (8). . Note that the stator (6) is configured to exchange energy with an external power device (toward).

10,000, inside the large diameter container (4) is a flywheel 01)
The rotating shaft (IjO) of this flywheel (b) extends into the small diameter container (8), and the rotating shaft (8) of the rotor (7) of the generator motor (5). The rotary shaft (chest) of the flywheel (11) connects its upper and lower ends to the partition wall (2) and the lower wall of the large-diameter container (4). The ζ roller provided in (4a) is supported by a p bearing (141% (b).Furthermore, above the flywheel (b) of the large diameter container (4), the weight of the flywheel) An electromagnet α6) is provided which carries the load, and this electromagnet (16) is provided with an excitation winding α.

This electromagnet (16) is supported by a bracket (g) of the large diameter container (4).

According to the above-described configuration, energy is stored by driving the generator motor (5) as an electric motor and converting the electrical energy from the power device into rotational inertia energy of the flywheel C1υ, and the energy is released. This is performed by operating as a generator motor and converting the rotational inertia energy of the flywheel 01) into electrical energy and returning it to the power device aη.

In such a flywheel device, the inside of the large diameter container (4) that houses the power of the flywheel device is normally used in a vacuum state to reduce windage damage caused by the rotation of the flywheel C11). It is. Furthermore, it is not easy to create a vacuum inside the small-diameter container (8) that houses the generator motor (5) due to problems such as temperature rise due to heat generated by the generator motor (5).
This becomes possible by separately considering the law of order (6). In this way, creating a vacuum inside both containers (8) and (4) reduces windage loss due to rotation and increases the efficiency of using stored energy, and in the flywheel device, It's important.

Even in the conventional 7-light wheel device shown in Figure 1, it is possible to create a vacuum inside by attaching a cover to the upper end of the rotating shaft (8) and the lower end of the rotating shaft (Kon) to maintain the vacuum. It is.

By the way, the rotational inertia energy E stored in the flywheel 01) is varied as follows. Here, the shape, size, and shape of the flywheel (b) are determined by the moment of inertia of the flywheel C11J.
The value is determined by the material, and ω is the flywheel (11
) is the number of rotations. According to the above equation, it can be seen that for the same seven flywheels (b), the larger the rotational speed ω, the larger the energy E stored in the flywheel αη.

However, in the conventional flywheel device mentioned above, roller bearings (Q) % 04) 10 ~ are used as bearings, so increasing the speed of the flywheel (B) will shorten the life of the bearings. This shortens the length of the flywheel and increases bearing loss during rotation, reducing the energy efficiency of the flywheel.

The present invention eliminates the drawbacks of the conventional ones mentioned above,
This was developed with the aim of providing a flywheel device that improves energy efficiency. A magnetic bearing is placed as the first bearing, and a pivot bearing is placed as the other bearing.

The present invention will be explained below with reference to an embodiment shown in FIG. Note that the same components as those of the conventional device described above are denoted by the same reference numerals in the drawings, and the explanation thereof will be omitted.

In Figure 2, the child is fully sealed true g! Between the small diameter container (8) and the large diameter container (4) constituting the valley device (1), the partition wall (2) as in the above-mentioned embodiment is not formed.
Both containers (8) and (4) are in communication. Also, the upper wall (3
a) and the lower wall (4a) are also completely closed off from the outside.

Then, the rotor (γn rotation shaft (8) of the generator motor (5)
A rotor of a magnetic bearing (2) using magnets such as permanent magnets and electromagnets is protruded from the upper end of the bearing, and the rotor of the magnetic bearing (2) is protruded from the upper end of the rotor. The upper wall (3
&) is attached with a stator (21) manufactured by Magnetic Bearing Co., Ltd. In addition, a pivot is vertically installed at the lower end of the rotating shaft (the lower end of the chest) of the flywheel I, 11, and the lower end of this pivot (-) is lubricated with a high viscosity coefficient on the lower wall (4a). It is supported by a bearing body (pivot bearing) supported by a damper box (not shown) soaked in oil.

According to the above-mentioned configuration, most of the weight of the rotor (γ) of the flywheel (6) and generator motor (5) is absorbed by the electromagnet (16) in order to reduce the melast force acting on the pivot bearing (). This will extend the life of the pivot bearing (4). In addition, because the upper bearing is a non-contact type magnetic bearing, bearing loss is much lower than that of conventional bearings, and the bearing life is also longer than that of conventional roller bearings. , flywheel <11) with the same shape, dimensions, and structure as the conventional structure.
If you use a material made of the same material, the rotation speed will be lower than that of the conventional one.
The flywheel device can be used in a much larger space, has a larger stored energy, and is more energy efficient.

In addition, in the above-mentioned embodiment, the pivot bearing (28
) is used at the bottom of the flywheel C11), and a magnetic bearing (
Although an example has been described in which the bearings 2) are arranged at the upper part, it is also possible to reverse the arrangement of these bearings α[S128].

As explained above, the flywheel device according to the present invention has a generator motor, a flywheel, a rotating shaft, and a bearing arranged in a completely sealed vacuum container sealed from the outside air, and a magnetic bearing arranged as a second bearing. Since the pivot bearing is disposed as the other bearing, the energy efficiency can be improved and the life of the bearing can be extended, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional 7-light wheel device;
FIG. 2 is a longitudinal sectional view showing an embodiment of the flywheel device according to the present invention. (1)... Sealed container (5) φ・Generator motor (6)
・・Stator (7) ・Rotor (8), (2)・
・Rotor α sword・・7 light wheels (to)・・Electromagnet α・・Magnetic bearing μs）・・Pivot bearing agent Makoto Kuzuno- Fig. 1 Fig. 2

Claims (1)

[Claims] Connect the generator motor and the 7 rye wheels to the rotating shaft,
In a flywheel device in which the rotating shaft is supported by upper and lower bearings and the flywheel is attracted upward by an electromagnet, the generator motor, the flywheel, the rotating shaft, and the bearings are sealed in a vacuum sealed from the outside air. A flywheel device disposed in a container, wherein a magnetic bearing is disposed as the ten thousand bearings, and a pivot bearing is disposed as the other bearing.