JPH03213672A - Energy storing method and its device - Google Patents

Abstract

PURPOSE:To effectively make use of surplus energy by lifting a weight up by the use of surplus energy as a power source so as to be stored as potential energy, lowering the weight as required, outputting kinetic energy at the time so as to be converted into rotating motion at high speeds, and thereby generating electricity. CONSTITUTION:When a weight 2 is located at the lower position, both an electric motor 1 and an electromagnetic brake 4 are energized by surplus current so that the electric motor 1 is thereby rotated with the brake released. This thereby causes a take-up drum 10 to be rotated via a weight lifting device 3 which is composed of gears 8a, 8b... small in diameter and of gears 9a, 9b... large in diameter so as to be combined together, so that the weight 2 is lifted up with a wire 11 taken up. When the weight 2 comes up to the uppermost position, current is interrupted so that the electromagnetic brake 4 is brought into a braking condition. When it is detected that electric power is demanded to a great extent, the brake is released with the electromagnetic brake 4 excited, and a generating set 7 is rotated at high speeds through a power converter 6 with the take-up drum 10 rotated as the weight 2 is lowered down so that electricity is thereby generated.

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention temporarily stores surplus energy and uses the stored energy to generate electricity when auxiliary power is required. The present invention relates to an energy storage method and device that facilitates the supply and demand of electric power and makes effective use of surplus energy.

[Conventional technology]

Recently, there is a need to solve environmental problems on a global scale, and on the other hand, there is an energy crisis. Therefore, it is necessary that energy be clean and used effectively in accordance with supply and demand.

Electricity, which is clean and easy to use, is considered to be the optimal energy source. It is desirable that the means of power generation be one that utilizes renewable energy, rather than thermal power generation using fossil fuels, which generate pollution and depletion, or nuclear power generation, which has safety concerns.

For example, wave power generation, geothermal power generation, hydroelectric power generation, solar thermal power generation, biomass power generation, and the wind power generation device proposed by the applicant (Japanese Patent Publication No. 6'3-42116/Jikkoi 1
There is wind power generation etc. by 8699 publication wA).

However, since the above-mentioned wave power generation, wind power generation, etc. utilize natural power, the power supply does not always balance well with the power demand. Furthermore, there are differences in electricity demand, for example, between summer and winter, and between daytime and nighttime, making it difficult to balance demand and supply. To solve this problem, energy storage is needed to temporarily store surplus electricity and supply it when needed.

Conventionally, this energy storage method and device includes, for example, a hot water storage type that stores energy by boiling water using surplus electricity;
A storage type that stores electricity in a storage battery, a pumped storage type that uses surplus electricity to pump water into a reservoir and use this water to generate electricity when needed, and a storage type that uses superconductivity, which has been in the spotlight recently, to store it in a superconducting coil with a resistance of O. There are superconducting types, etc.

[The problem that the idea aims to solve]

Among the above-mentioned energy storage means, if an energy storage device is installed using a hot water storage type or a pumped storage power generation type, a vast installation area is required. In addition, the energy storage type has its own problems, such as the storage battery's ability to store electricity is not yet sufficient, and the superconducting type, although theoretically possible, has not yet been technically established. Therefore, energy storage methods and devices have not yet reached the point of being actively realized.

An object of the present invention is to solve the problems of the above-mentioned conventional means as an energy storage method and device. That is, an object of the present invention is to provide an energy storage method and device that can store a large amount of energy even in a relatively small footprint and that can be installed immediately using already established technology. It is about providing.

Structure of the Invention [Means for Solving the Problems] ■ The energy storage method according to the present invention, when there is surplus energy, uses the surplus energy as a power source to lift a heavy object upward and lock it in place. When the stored energy needs to be supplied, the lifted and locked heavy object is lowered, and the kinetic energy from the lowering is extracted as high-speed rotational motion. By generating electricity using kinetic force, it is possible to supplementally supply electricity.

■ The energy storage device according to the present invention is a driving bag that operates using surplus energy! (1) and the above driving bag N
A heavy object lifting device (3) that lifts the heavy object (2) according to (1), a heavy object locking device (4) that locks the lifted heavy object (2), and whether or not there is a need for auxiliary power supply. Detection device (5) that detects
, a power conversion device (6) that converts the descent of the heavy object (2) into high-speed rotational motion, and a power generation device (7) that generates electricity using the rotational force from the power conversion device (6). .

In the above configuration, the drive device (1) that operates using surplus energy is a mechanical type, such as an electric motor (see Figure 1), or a hydraulic type, such as a hydraulic pump (second drive unit) that operates by converting surplus energy into electric power. (see figure), and hydraulic pumps (see figure 5) that generate hydraulic pressure without converting surplus energy into electricity and operate with the hydraulic pressure.

The heavy object (2) may be, for example, steel, sand, rubble, water, etc. contained in a container.

In the heavy object lifting device (3), when an electric motor is used for the drive bag M (1), the rotational force of the electric motor is used in the final stage.
A plurality of sets in which a small-diameter gear (8) meshes with a large-diameter gear (8) may be provided so that the axis of the hoisting drum α field on which the heavy object (2) is suspended can be hoisted together (see FIG. 1).

When the drive device (1) is a hydraulic pump, for example, a hydraulic cylinder is used as the heavy object lifting device (3), and the heavy object (2) is pushed up by a piston that is raised by pressure oil from the hydraulic pump. (See Figures 2, 4, and 5). The number of hydraulic cylinders serving as the heavy object lifting device (3) is not limited to one, and a plurality of hydraulic cylinders may be arranged in series in the vertical direction or in parallel in the horizontal direction.

The heavy object locking device (4) includes the heavy object lifting device (3).
) is used with a hoisting drum α and large and small diameter gears (8) and (9) that rotate it, for example, an electromagnetic, hydraulic, or pneumatic brake that stops the rotation of one gear shaft may be used. (See Figures 1 and 3).

In addition, when the heavy object lifting device (3) is a hydraulic cylinder, the heavy object locking device (4) is placed, for example, in the middle of the oil path from the hydraulic cylinder to the hydraulic motor as the power conversion means (6).
A flow control valve may be provided (see Figures 2 and 4 to 5).

The heavy object locking means (4) is preferably operated automatically, but may also be operated manually.

The detection bag N (5) is designed to measure the amount of current that changes depending on the power demand, for example, or to detect a power outage to determine whether there is a need for auxiliary power supply (Figures 2 and 4). reference). Note that it is preferable to take action on the data obtained by the detection device (5) automatically, but it may also be done manually.

The power conversion device (6) includes the heavy object lifting device t (
If small and large diameter gears (8) and (9) are used in 3),
They are combined in reverse so that the large diameter gear (9) meshes with the small diameter gear (8), and the heavy object lifting device (3
) can also be used as the power conversion device (6) (first
In addition, when the heavy object lifting device (3) is a hydraulic cylinder, the power conversion device (6) may be, for example, a hydraulic motor rotated by pressure oil from the hydraulic cylinder (see Figures 2 and 4).・See Figure 5).

The power generation bag M (7) and the drive device (1) are designed so that when one is in operation, the other idles or stops.

The energy storage device according to the present invention may be used to supply auxiliary power when the power demand increases, but is not limited to this, and may be used, for example, as an auxiliary power supply in a hospital or the like during a power outage. Further, this device may be installed on the ground like a normal structure, but if there is no space, it may be installed on the roof or basement of a building, for example. Furthermore, if the outer wall of a high-rise building is provided as part of the support frame α, a large height difference can be obtained.

In the figure, α9 indicates a control circuit board, which houses circuits and switches aG for controlling surplus energy storage, standby, power generation, etc. using stored energy. Ql indicates a guide frame.

[For production]

Next, the operation of the energy storage method and device according to the present invention will be described.

At night, electricity consumption is low and surplus energy is generated.
For example, when generating electricity using a wind power generator, if strong winds continue, the amount of power generated is large and surplus energy is generated.

Other power generating devices and energy generating devices also generate surplus energy.

In such cases, use the surplus energy as a power source! (1) is activated, and the heavy object lifting device (3) is activated by the drive device (1) to lift the heavy object (2) upward.

By locking the lifted heavy object (2) with the heavy object locking device (4), the surplus electric power is stored as potential energy.

If the detection device (5) detects the need for auxiliary power supply using stored energy, for example if there is an increase in power demand or a power outage, the heavy object locking device (4) will be released from the locked state. Just let it happen.

As a result, the heavy object (2), which has been lifted and locked to store potential energy as described above, begins to descend.

The kinetic energy generated by the descent of the heavy object (2) is converted into high-speed rotational motion by the power conversion device M (6), and the power generation device (7) is rotated by the high-speed rotational motion to generate electricity. Therefore, the auxiliary power generated using this stored energy may be supplied to the demand side.

〔Example〕

A: First, the one shown in Figure 1 is a mechanical type that uses an electric motor (1) as the drive device and small and large diameter gears (8) (91) as the heavy object lifting device (3). be.

That is, as a heavy object lifting device (3), a small-diameter lifting gear (8a) is provided on a shaft connected to the electric motor (1), a large-diameter gear (9a) is meshed with this, and the small-diameter gear and large-diameter gear are sequentially connected to each other. Multiple gears are combined to increase rotational force.

Then, a heavy object (2) is placed on the shaft of the top large diameter gear (9C).
It is equipped with hanging wire and a winding drum OI of Cheno I.

An electromagnetic disc brake (
4), the distal side is mounted on the shaft of one of the small diameter gears (8b) of the heavy object lifting device (3), and the friction member (9) is normally pressed with a spring 0 to stop the rotation. When necessary, the friction member (2) can be moved electromagnetically from the distal side against the spring force to release the lock.

The detection device (5) is for measuring changes in power demand by the amount of current or detecting a power outage. Based on the data, the electromagnetic brake (4) and others are operated.

The power conversion device (6) is a small diameter/
It utilizes large-diameter gears (8) and (9), and combines multiple stages with their sizes reversed. That is, the large-diameter gear (9C) at the top stage coaxial with the hoisting drum α is meshed with the small-diameter gear, and a plurality of large-diameter gears and small-diameter gears are successively combined. Diameter gear (9b
) is meshed with the power generating small diameter gear (8b) to rotate at high speed, and the power generating device (7) coaxial with it rotates at high speed to generate power.

Next, FIG. 2 shows an outline of the electric circuit of this embodiment, and the figure shows a state in which energy is being stored using surplus power.

Briefly based on this, the surplus current from the surplus current line (24) shown in the lower right of the same figure is generated when the limit switch I2 peak remains closed while the heavy object (2) is below, and the lower left Push-button switch for external current (16a
) remains open, and the B contact electromagnetic switch (16b) for excessive current at the bottom right is also closed, so current is energized within this circuit.

This surplus current goes to the electric motor (1) via the contact electromagnetic switch (16b) mentioned above, and the branched wiring b
Electromagnetic brake (4) via contact electromagnetic switch (16c)
reach. Therefore, the friction member (6) is pulled outward against the spring a1, the disk (b) becomes free and the lock is released, and the electric motor (1) rotates due to the surplus current.

With this, the lowermost small-diameter lifting gear (8a) coaxial with the electric motor (1) rotates the large-diameter gear (9a) that meshes with it, and the small-diameter gear sequentially rotates the large-diameter gear. Then, the winding drum α coaxial with the large diameter gear (9C) at the top stage
[As a result, the suspended heavy object (2) rises and potential energy is stored.

When the heavy object (2) reaches the uppermost position, the limit switch Q1 opens and the excess current line (24) is cut off, so no current flows to the electric motor (1) and rotation stops. At the same time, current no longer flows to the electromagnetic brake (4), so the friction member a presses the disc (2) with the force of the spring 01, applying the brake and stopping the rotation of the shafts of each gear (8) and (9). let

In this state, the system is kept on standby until auxiliary power is required due to an increase in power demand or a power outage, for example.

If the detection device (5) detects an increase in power demand or a power outage, it automatically or manually activates the push-button A-contact electromagnetic switch (1
Close 6a). Now the external current from the external current line (23) enters the circuit, and the b contact electromagnetic switch (bottom right) above (
16b) to cut off the surplus current side, and the A contact electromagnetic switch (16d) of the wiring branched from the middle.
will be closed.

Therefore, the external current passes through the same switch (16d), reaches the electromagnetic brake (4) via the B contact electromagnetic switch (16e), and pulls the friction member outward against the spring side force. Release the brake (4).

Now the heavy lifting device (3) and power conversion device (6)
Since the gears (8) and (9) become rotatable, the heavy object (2) gradually begins to descend. As the heavy object (2) descends, the large-diameter gear (9c) at the top stage rotates the small-diameter gear that meshes with it, and the large-diameter gear sequentially rotates the small-diameter gear, and the small-diameter gear (9c) for power generation at the bottom stage rotates the small-diameter gear (9c). 8b) is rotated at high speed.

The high-speed rotation of this power generation small-diameter gear (8b) causes the coaxial power generation device (7) to rotate at high speed, thereby generating power. Then, the current closes the a-contact electromagnetic switch (16f) at the end of the power generator (7), and is supplied to the output line α as auxiliary power via the switch (16f).

In addition, the surplus energy is used to generate electricity using the power generation device (7).
When supplying auxiliary power, a part of the current that closes the a-contact electromagnetic switch (16f) is transferred to the external current line (23f).
) will open the electromagnetic switch (16i), so no external power will flow into the circuit.

B The one shown in FIG. 2 is a hydraulic type using an electric hydraulic pump (1) as the drive device.

A hydraulic cylinder (3) is used as the heavy object lifting device, and the piston is raised by the pressure oil supplied by the hydraulic pump (1), which is operated by surplus electric power, to lift the heavy object (2).

A flow control valve (4) is used as a heavy object locking device, and the hydraulic cylinder (3) and a hydraulic motor (6) are used as a power conversion device.
).

The detection device (5) is configured to measure the current that changes depending on the power demand or to detect a power outage, as in the previous embodiment.

The power conversion device uses the hydraulic motor (6) as described above, and the hydraulic motor (6) rotates at high speed with the pressure oil released from the hydraulic cylinder (3) as the heavy object (2) gradually descends. That's how it is.

Power generation bag! (7) is connected to the hydraulic motor (6).

Incidentally, FIG. 4 schematically shows the circuit of this embodiment, and shows a state in which energy is being stored using surplus power.

Briefly based on this, the current from the external current line (23) at the bottom of the figure is carried out within this circuit because the push-button type A contact electromagnetic switch (16g) for external current remains open. In this state, the flow control valve Ql, which serves as a heavy object locking device, is closed by the control motor (21).

Therefore, when the hydraulic pump (1) operates with surplus current from the surplus current line (24), pressure oil flows into the hydraulic cylinder (3).
As the piston rises, the heavy object (2)
is lifted and potential energy is stored.

When the heavy object (2) reaches the top stage, the limit switch (to) cuts off the excess current and stops the hydraulic pump (1), as in the case of the mechanical type described above, but the check valve (22) stops the hydraulic pump (1). Since the oil is in the hydraulic cylinder (3), heavy objects (2)
) waits in this state with stored energy.

Now, for example, the bag M(5) detects an increase in electricity demand or a power outage.
is detected, just close the push-button type A contact electromagnetic switch (16g) for external current, and the external current from the external current line (23) will be switched to the B contact electromagnetic switch for external current. The above-mentioned control motor (
21) and rotates the motor (21) to appropriately open the flow control valve (4).

Therefore, the pressure oil in the hydraulic cylinder (3) is
4), which rotates the hydraulic motor (6) and generates a power generator coaxially with the hydraulic motor (6)! :(7) is rotated to generate electricity. The electric power generated by this stored energy is supplied to the output line α as auxiliary electric power.

At this time, part of the current opens the b contact electromagnetic switch (16h) for the external current, so the external current is cut off.

The one shown in Fig. 5 uses a hydraulic pump (1
) in that it uses a hydraulic cylinder (1) as a heavy object lifting device, a flow control valve (4) as a heavy object locking device, and a hydraulic motor (6) as a power conversion device. ) etc., the main parts are the same. However, while the system described in B above operates the hydraulic pump (1) after converting the surplus energy into electricity, the system in Figure 5 does not convert the surplus energy generated by the windmill (25) into electricity. , which is different in that the rotational force directly operates the hydraulic pump (1).

FIG. 5 shows an outline of the circuit of this embodiment, for example, a wind turbine (
25) shows a state in which surplus energy is being stored, and this will be briefly described.

In this state, the flow rate control valve 0I19 as a weight locking device is closed as in case B above. In addition, heavy objects (2
) is at the bottom, the lever-like limit actuation rod (26), which has the same effect as a limit switch, is not pushed up, and the valve actuation lever (26) hanging from the actuation rod (26) is not pushed up.
27) is in a loose state. Therefore, the Cheno (27
) is activated when the hydraulic motor (6) is pulled up, the normally closed hydraulic valve (28) (corresponding to the a contact in an electric switch) is closed, while the normally closed circuit to the hydraulic cylinder (1) is closed. Closing hydraulic valve (29) (b with electric switch
(equivalent to a contact point) is open.

Now, when surplus energy is generated due to the rotation of the windmill (25), the rotational force as the surplus energy directly operates the hydraulic pump (1) to send out pressure oil. This pressure oil does not go to the hydraulic motor (6) because the normally closed hydraulic valve (28) is closed as described above, and on the other hand, the normally open hydraulic valve (28) is closed.
29) is open, so it goes to the hydraulic cylinder (3). By pushing up the piston of the hydraulic cylinder (3), the heavy object (2) is gradually lifted and potential energy is stored.

When the heavy object (2) reaches the highest position, the limit operating rod (26) is pushed up, so the valve operating cheno (2)
7) Pull up. This closes the normally open hydraulic valve (29) in the circuit toward the hydraulic cylinder (3), stopping the supply of pressure oil to the hydraulic cylinder (3).

The pressure oil filled in the hydraulic cylinder (3) is closed by the flow control valve (4) as in the case described in B above, and is also stopped by the check valve (22), so that the piston does not move. The heavy object (2) is still lifted to the highest position,
It maintains a stored state of potential energy and waits until the surplus energy is needed.

In the above-mentioned standby state, that is, after lifting the heavy object (2) to the highest position, the normally open hydraulic valve (29) in the circuit going to the hydraulic cylinder (3) closes, while the hydraulic motor (6) closes. ) A normally closed hydraulic valve (28) in the circuit to
is opened again, so that the pressure oil generated by the rotation of the hydraulic pump (1) by the windmill (25) is directly transferred to the hydraulic motor (6) via the open hydraulic valve (28) to the hydraulic motor (6). will be supplied. Therefore, the hydraulic motor (
6) rotates and the power generating device (7) connected thereto rotates to generate power, so it is sufficient to supply it from the output line Ql.

Now, if the detection device (5) detects, for example, an increase in power demand or a power outage, and it is necessary to supply auxiliary power by using stored energy, use the external power inflow pushbutton as in the case described in B above. All you have to do is close the button type A contact switch (16g).

Now, the external current enters the llal circuit, rotates the control motor (21), and opens the flow control valve (4).The pressure oil in the hydraulic cylinder (3) can now flow out, so the potential energy The piston, which was supporting the heavy object (2) holding the cylinder, gradually descends, and the pressure oil in the hydraulic cylinder (3) gradually flows out under strong pressure.

Therefore, the pressure oil rotates the hydraulic motor (6) at high speed through the flow control valve (4), and the power generator (η
will rotate to generate electricity. The electric power obtained by using this stored energy may be supplied to the output line α as auxiliary electric power. At this time, the external current is cut off as in case B above.

Furthermore, when the heavy object (2) starts to descend by using the stored energy, the limit operating rod (26) lowers and the valve operating chain (27) loosens, which causes the hydraulic motor (6) to
The normally closed hydraulic valve (28) to the hydraulic cylinder (3) will close, while the normally open hydraulic valve (29) to the hydraulic cylinder (3) will also open. Therefore, when the windmill (25) starts rotating again and generates energy to operate the hydraulic pump (1), the pressure oil from the hydraulic pump (1) is not supplied to the hydraulic motor (6). , is supplied to the hydraulic cylinder (3). This means that you can use stored energy to generate electricity and at the same time store excess energy.

Effects of the Invention As is clear from the above, the energy storage method and device according to the present invention can temporarily store surplus energy, and when supplementary power supply is required due to an increase in power demand or other reasons,
Since power can be generated using stored energy, it is possible to smooth the supply and demand of electricity and effectively use surplus energy.

In other words, recently there has been much talk of an energy crisis, but on the other hand, global environmental problems have also been raised.

Therefore, it is necessary to use clean energy effectively.

However, since wave power generation, geothermal power generation, hydroelectric power generation, solar thermal power generation, biomass power generation, wind power generation, etc., which obtain clean energy, utilize natural power to the fullest, it is difficult to maintain a good balance between power supply and demand. Therefore, energy storage is necessary, but conventional methods such as hot water storage type, pumped storage power generation type, electricity storage type, and superconducting type require a large space for installation, have insufficient power storage capacity, or are not yet technologically advanced. Each method has its own problems, such as not being established, and is currently not being put into practical use.

In contrast, the energy storage method and device according to the present invention uses surplus energy to lift a heavy object and store it as potential energy, and then lowers the heavy object when auxiliary power is needed. The kinetic energy of the motor rotates the power generator, which generates electricity.

Therefore, the energy storage method and device according to the present invention can store a large amount of energy in a relatively small footprint unlike conventional methods, and since it uses already established technology, it can be installed immediately. It is something that can be done.

Therefore, the energy storage method and device according to the present invention greatly contributes to smoothing the demand and supply of electric power and effectively utilizing surplus energy.

[Brief explanation of drawings]

The figures show an embodiment of the energy storage method and device according to the present invention, in which Fig. 1 is a front view when a gear is used in a heavy object lifting device, and Fig. 2 is an electric circuit of the embodiment of Fig. 1. Figure 3 is a front view of a case where a hydraulic cylinder is used in a heavy object lifting device, Figure 4 is a circuit diagram of the embodiment shown in Figure 3, and Figure 5
The figure shows a circuit diagram of another embodiment in which a hydraulic cylinder is used in the heavy object lifting device. Drawing code (1) - Drive device (2) - Heavy object (3) - Heavy object lifting device (4) - Heavy object locking device (5) - Detection device (6) - Power conversion device (7) - R type Device O2-11tlE Roadbed Q19 Switches αη - Support frame α - Guide frame 0 - Output line (23) - External current line (24) Surplus current line Figure Drawing code fil - Drive device (3) - Heavy object lifting device (5) - Detection device (7) - Generator side - Switches α Enoki - Guide frame (23) - External current line (2) - Heavy object (4) - Heavy object locking device (6 ) - Power conversion device 0 - Control circuit board αη - Support frame (to) - Output line (24) - Surplus current line 2nd figure Drawing code + 11 = Drive device (3) - Heavy object lifting device (5) - Detection device (7) - Generator αQ - One guide frame (23) of switches α - External current line (2) - Heavy object (4) - Heavy object locking device (6) - Power conversion device α $ Control circuit board aη - Support frame (to) - Output line (24) - Surplus current line No. 4 Drawing code (1) - Drive device (3) - Heavy object lifting device (5) - Detection device (7 ) - Generator 0 [9 - Switches α - Guide frame (23) - External current line (2) - Heavy object (4) - Heavy object locking device (6) - Power converter 0 - Control circuit Panel αD - Support frame 0!1 - Output line (24) - Surplus current line Drawing code (1) - Drive device (3) - Heavy object lifting device (5) - Detection device (7) - Power generation device 0 [ 9 - Switches - Guide frame (23) - External current line (2) - Heavy object (4) - Heavy object locking device (6) - Power converter QSI - Control circuit board αη - Support frame α mark - Output line (24) - Surplus current line Procedure Space Book March 20, 1991 1゜2゜3゜Indication of incident 1990 Patent Application No. 8039 Name of invention Energy storage method and device Amended Relationship with the patent applicant case No. 26 No. 302 4゜

Claims (1)

[Claims] [1] When there is surplus energy, the surplus energy is used as a power source to lift a heavy object upward, lock it, and store it as potential energy, and supply the stored energy. When it becomes necessary to lower the heavy object that has been lifted and locked, the kinetic energy from the descent is extracted as high-speed rotational motion, and this high-speed rotational kinetic force is used to generate electricity, thereby providing supplementary power. An energy storage method characterized by: [2] A drive device (1) that operates using surplus energy, a heavy object lifting device (3) that lifts the heavy object (2) using the drive device (1), and locks the lifted heavy object (2). A heavy object locking device (4) and a detection device (5) that detects whether auxiliary power supply is necessary.
and a power conversion device (6) that converts the gradual descent of the heavy object (2) into high-speed rotational motion, and a power generation device (7) that generates electricity using the rotational force from the power conversion device (6). Energy storage device. [3] As a drive device, an electric motor (1) rotated by electricity generated from surplus energy is used, and as a heavy object lifting device, a hoisting drum (1) with a heavy object (2) suspended from the upper part is used.
0) and multiple stages of small and large diameter gears (8) that expand the power of the electric motor (1) to rotate the drum (10).
) (9), a brake (4) for stopping the rotation of either of the shafts of the gears (8) and (9) is provided as a heavy object locking device, and a power generating device (7) is provided as a power conversion device. The surplus energy according to claim 2, wherein a plurality of large-diameter and small-diameter gears (9) and (8) in which the sizes of the gears of the heavy object lifting device are reversely combined are used in order to rotate the machine at high speed. Storage device. [4] As a drive device, a hydraulic pump (1) operated by electricity generated from surplus energy is used, and as a heavy object lifting device, a heavy object (2) installed at the top so as to be movable up and down is moved from the hydraulic pump (1). A hydraulic cylinder (3) that can be pushed up with pressure oil is used, and a flow control valve (4) is installed in the middle of the oil path from the hydraulic cylinder (3) to the power conversion device (6) described later as a heavy object locking device. The surplus energy according to claim 2, wherein a hydraulic motor (6) capable of rotating a power generation device (7) with pressure oil passed through the flow control valve (4) is used as the power conversion device. Storage device. [5] As a drive device, a hydraulic pump (1) operated by hydraulic pressure from surplus energy is used, and as a heavy object lifting device, a heavy object (2) installed at the top so as to be movable up and down is moved from the hydraulic pump (1). A hydraulic cylinder (3) that can be pushed up with pressure oil is used, and a flow control valve (4) is installed in the middle of the oil path from the hydraulic cylinder (3) to the power conversion device (6) described later as a heavy object locking device. As a power conversion device, a hydraulic motor (6) capable of rotating a generator (7) with the pressure oil passed through the flow control valve (4) is provided.
The surplus energy storage device according to claim 2, wherein the surplus energy storage device uses: