JPS5914634B2 - Force storage device using variable inertia body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a force storage device using a variable inertial body that can efficiently control rotational speed when inputting and outputting inertial force to a rotating inertial body.

Traditionally, surplus electricity that occurs irregularly within a certain period of time is
A device that stores power depending on the situation and uses this stored power as power as needed or all at once.
One example is a force storage device using an inertial body.

As is well known, if the inertial force (kinetic energy) stored in a rotating inertial body is E, the rotational speed is ω, and the moment of inertia is 1, E=”ω2.

When such inertial force is used to transfer and receive electric force, a mutual conversion device between electric force and mechanical force is required.
When applying mechanical input to a rotating inertial body, use an electric motor,
In order to output the stored power, a generator is connected, and it is desirable that the rotational speed be constant within a range during operation.

However, when considering a conventional force storage device, I is constant, and an increase or decrease in E results in an increase or decrease in ω, and as the inertial force is released from the rotating inertial body, the rotational speed gradually increases because the moment I of the inertial body remains unchanged. descend.

Furthermore, in the conventional type, storing force in the inertial body means increasing the rotational speed.

Therefore, in the conventional system, the rotating speed of the rotating inertial body changes due to the transfer of stored force to and from the rotating inertial body, which is inconvenient, so the rotating shaft of the rotating inertial body is indirectly connected to the electric motor or generator via a transmission. In this case, a portion of the accumulated inertia force is consumed by the frictional force of the complicated transmission mechanism, resulting in a decrease in efficiency.

The present invention was made in view of these points, and aims to change the moment of inertia H, enable constant speed operation of the inertial body, and easily transfer and receive highly efficient inertial force. It is.

Next, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a hollow disc-shaped rotating body, and its rotating shaft 2 is supported by a bearing 3.

As this bearing 3, a ball bearing or the like is used so that there is extremely little loss during long-term power storage operation.

Furthermore, when the rotating body 1 is operated in the outside air, the windage loss of the rotating body 1 cannot be ignored, so if the rotating body 1 is operated under reduced pressure, in a vacuum, or in a hydrogen gas atmosphere, good.

In that case, the one in FIG. 1 would be further covered by a closed container, but this is omitted in the figure.

Reference numeral 4 denotes a liquid for changing the moment of inertia I of the rotating body 1 and is injected into the interior of the rotating body 1 from an injection port 5 at the top of the rotating shaft 2 .

The liquid 4 is injected into the rotating body 1 through the perforated portion 5a at the center of the rotating shaft 2, and rotates with the rotating body 1.

In the figure, the injection port 5 is axially symmetrical with respect to the axis, so that there is no imbalance in the balance of the rotating body 1 during liquid injection.

Reference numeral 6 denotes a discharge port for the liquid inside the rotary body 1, which is provided axially symmetrically on the outer circumferential portion of the rotary body 1, and its discharge direction is opened in a direction opposite to the direction of rotation of the rotary body 1.

This allows the inertial force held by the liquid 4 rotating together with the rotating body 1 to remain in the rotating body 1 when released, and is useful for preventing loss of stored force.

Further, 7 is a discharge valve for controlling the discharge amount of the liquid 4. This discharge valve 7 is connected to a movable core 8a of an electromagnet 8 through a steel cable 7a, and the discharge valve 7 is opened and closed by excitation and demagnetization of the electromagnet 8. Let it happen.

Note that by using the electromagnet 8 or a rotary transformer, etc., the discharge valve 7 can be operated by an indirect operating force without contact with the rotating shaft 2, but an electric brush, a sliding ring, etc. can be used to operate the discharge valve 7 mechanically. This is undesirable because friction loss occurs.

Reference numeral 9 denotes partition plates arranged axially symmetrically inside the rotating body 1, provided in the radial direction, and having notches 10 perforated on the outer circumferential side, the number of which is determined by the size, speed, and acceleration of the rotating body 1; It also serves as the skeleton of the rotating body 1 and is designed for strength.

This partition plate 9 is necessary to rotate the liquid 4 injected into the rotating body 1 together with the rotating body 1, and the partition plate 9 is necessary for rotating the liquid 4 injected into the rotating body 1. The imbalance that a certain amount of liquid causes on the rotating body 1 is:
This is corrected by equalizing the amount of liquid in each compartment through the communication action of the notch 10.

It goes without saying that the liquid 4 injected into the rotating body 1 is one that increases the storage force of the inertial body, so a liquid with a high specific gravity is selected, but as mentioned above, operation in a reduced pressure or vacuum atmosphere is recommended. A liquid such as oil with low evaporability is suitable, and mercury is most desirable from a functional standpoint.

11 is an asynchronous induction machine consisting of a rotor 12a and a stator 12b, and is directly connected to the rotating body 1.

This is because a dragon-shaped rotor with a large secondary side resistance value is suitable for operation at rotational speeds with large slippage, so such a rotor is preferable, and for economical operation over a wide range, an induction motor that can change the number of poles is also recommended. suitable for use.

Reference numeral 13 denotes a discharged liquid receiving tray, which accommodates the discharged liquid from the discharge port 6 of the rotating body 1, and controls the amount of the liquid 4 supplied to the injection port 5 by the liquid circulation pump 14.

Next, driving will be explained.

First, since the rotating body 1 is in a stationary state, when the asynchronous induction machine 11 is connected to a power source, it becomes a thin induction motor and the rotating body 1 starts rotating.

In this case, remove all the liquid inside the rotating body 1 in advance, minimize the moment of inertia I, and keep the rotating body 1 clean.
Since the motor itself has an extremely large moment of inertia, reaching full speed requires a large amount of power relative to the capacity of the electric motor, and takes a long time.

Therefore, a high-resistance rotor on the secondary side is desirable, in which the torque decreases little even at high slip speeds.

Next, when the rated speed of the electric motor, that is, the sliding speed of many of the synchronous speeds is reached, injection into the injection port 5 is started in order to increase the stored force due to the inertia of the rotating body 1.

The injected liquid 4 forms an annular shape around the outer periphery of the rotating body 1 due to centrifugal force, and rotates together with the rotating body 1 due to the action of the partition plate 9.

The uneven amount of liquid due to the partition plate 9 is averaged out by the communication effect of the notch 10, and the rotation of the rotating body 1 is performed quietly.

Although the injection of the liquid 4 acts to reduce the rotational speed of the rotating body 1, it rotates at a substantially constant speed in conjunction with the rotational output of the electric motor.

In this way, the moment of inertia l-1 of the rotating body 1 increases with an increase in the amount of liquid 4 injected, and the stored force of the rotating body 1 increases, and the full liquid state indicates the maximum value of the stored inertial force.

Next, in this state, when the discharge valve 7 of the discharge port 6 is opened, the liquid 4 is discharged from the discharge port 6 to the outside of the rotating body 1, but since the discharged liquid itself has inertial energy, the rotation direction The retained energy can be returned to the rotating body 1 by opening in the opposite direction to the prisoner and releasing it.

At the same time, the rotational speed of the rotating body 1 increases by the amount of liquid discharged due to a decrease in the moment of inertia, the induction motor becomes an induction generator, and the generated power is fed back to the power source.

By smoothly controlling the liquid discharge in this way, constant speed generator operation is possible.

That is, in E2±ω2, ω is kept constant by decreasing ① by the amount that E decreases.

Further, by connecting the asynchronous induction machine 11 so that the number of poles can be changed, power can be transferred smoothly over a wider range, which is more effective.

As described above, the present invention eliminates the need for a transmission and facilitates highly efficient rotational operation by controlling the moment of inertia of the rotating body by the amount of liquid injected into the rotating body, thereby reducing rotational energy. This device can be used as an extremely effective energy storage device for transferring and receiving energy.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a force storage device using a variable inertia body of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1,
FIG. 3 is a sectional view taken along the line ■--■ in FIG. 2. 1... Rotating body, 2... Rotating shaft, 4...
...Liquid, 5...Inlet, 6...
Discharge port, 7...Discharge valve, 11...Asynchronous induction machine.

Claims (1)

[Claims] 1. A rotary shaft, a hollow disc-shaped rotary body supported by the rotary shaft, a liquid injected into the rotary body, and the amount of liquid in the rotary body controlled by rotational operation. A liquid injection means and a liquid discharge means for changing the moment of inertia by increasing or decreasing the inside of the rotary body, and an input/output means provided on the rotation shaft of the rotary body and for inputting and outputting inertia force to and from the rotary body. A power storage device using a variable inertia body characterized by: 2. A force storage device using a variable inertia body according to claim 1, wherein the injection port for the rotating body in the liquid injection means is provided on the rotating shaft. 3. The liquid discharge means is formed by a discharge port disposed on the outer periphery of the rotating body, a valve that opens and closes this discharge port, and a mechanism that operates this valve by indirect operating force without contacting the rotating shaft. A force storage device using a variable inertia body according to claim 1 or 2, characterized in that: 4. A patent claim characterized in that the discharge ports in the liquid discharge means are arranged axially symmetrically around the outer circumference of a hollow disc-shaped rotating body, and the direction of the liquid discharge ports is opposite to the direction of rotation. A force storage device using a variable inertia body according to any one of items 1 to 3. 5. A force storage device using a variable inertia body according to any one of claims 1 to 4, characterized in that the inside of the outer circumference of the rotating body is partitioned into a plurality of sections that can be partially communicated with each other. 6. A force storage device using a variable inertia body according to any one of claims 1 to 5, wherein the rotating body rotates under reduced pressure or a vacuum state. 7. A force storage device using a variable inertia body according to any one of claims 1 to 6, characterized in that the liquid is a static liquid with little evaporation. 8. A power storage device using a variable inertia body according to any one of claims 1 to 7, wherein the input/output means is an asynchronous induction machine. 9. A power storage device using a variable inertia body according to claim 8, wherein the asynchronous induction machine is capable of changing the number of poles.