CN114810260B - Gravity energy storage system with buffering effect - Google Patents

Abstract

The application provides a gravity energy storage system with a buffering function, which comprises a vertical shaft; the gravity block is movably inserted in the shaft and is in sealed connection with the side wall of the shaft through a sealing piece, the gravity block comprises a shell and a heat storage material filled in the shell, the bottom of the shell is provided with a first vent hole, the top of the shell is connected with an air compressor unit and an air expander unit, the inner wall of the shaft and the outer wall of the shell are correspondingly wound with wire coil arrays, the wire coil arrays on the inner wall of the shaft are sequentially connected with different power supplies, each wire coil on the outer wall of the shell is closed, and alternating current with fixed frequency is applied to the wire coil arrays on the inner wall of the shaft through the power supplies, inducing reverse circulation currents in the wire coil array on the outer wall of the shell to enable two groups of opposite current directions to form reverse electromagnetic fields to the wire coil array, applying upward acting force to the gravity block through the electromagnetic force, when an emergency occurs, the gravity block is quickly decelerated, and the impact kinetic energy to the lower part of the vertical shaft when the vertical shaft falls is reduced.

Description

A Gravity Energy Storage System With Buffering Function

technical field

The present application relates to the technical field of electrical energy storage, and in particular, to a gravity energy storage system with a buffering effect.

Background technique

Gravity compressed air energy storage is to set a gravity block in the shaft, the gravity block and the shaft are sealed and connected by a sealing film, and a sealed air storage cavity is formed in the shaft under the gravity block for the storage of high-pressure gas. After being compressed, it is passed into the air storage chamber, and the gravity block moves upward, converting the energy of the compressed air into the gravitational potential energy of the gravity block for storage. During the energy storage process, the heat energy generated by the compressed air is usually heated by setting a heat exchange unit. However, the setting of the heat exchange unit makes the energy storage system complicated, and in the event of an emergency, the uncontrolled downward acceleration of the gravity block will cause a greater impact below the shaft.

SUMMARY OF THE INVENTION

The present application aims to solve one of the technical problems in the related art at least to a certain extent.

For this reason, the purpose of this application is to propose a gravity energy storage system with a buffering effect, by correspondingly winding a conducting coil array on the inner wall of the shaft and the outer wall of the gravity block, and applying alternating current of a fixed frequency to the coil array on the inner wall of the shaft through a power supply, The upward electromagnetic force is generated, so that in the event of an emergency, the gravity block accelerates downward uncontrollably, and the coil power supply on the inner wall of the shaft is excited to quickly start the power supply and form an electromagnetic field, and a reverse electromagnetic field is induced in the coil on the outer wall of the gravity block, so that the The gravity block decelerates quickly, reducing the kinetic energy of the impact on the bottom of the shaft when it falls, and the heat storage material filled in the gravity block can directly exchange heat through the heat storage material, without the need for additional heat exchange units.

In order to achieve the above purpose, a gravity energy storage system with buffering function proposed in the present application includes a shaft;

A gravity block is movably inserted into the shaft, the gravity block and the side wall of the shaft are sealed and connected by a sealing film, and the gravity block, the sealing film and the shaft are located in the space below the sealing film A gas storage cavity is enclosed between;

The gravity block includes a casing and a heat storage material filled in the casing, the bottom of the casing is provided with a first ventilation hole that communicates with the air storage cavity, and the top of the casing is connected with an air compression Units and air expansion units;

The inner wall of the shaft and the outer wall of the casing are correspondingly wound with an array of conducting coils, the arrays of conducting coils on the inner wall of the shaft are connected to different power sources in sequence, and each conducting coil on the outer wall of the casing forms a closed circuit by itself, so as to pass through all the coils. The power supply applies alternating current of a fixed frequency to the conducting coil array on the inner wall of the shaft, and a reverse circulating current is induced in the conducting coil array on the outer wall of the casing, so that two sets of conducting coil arrays with opposite current directions form an opposite direction. After the electromagnetic field, an upward force is applied to the gravity block through electromagnetic force.

Further, the top of the casing is provided with two second ventilation holes, both of which are provided with valves, and the two valves are respectively connected with an air inlet channel and an air outlet channel. The passage and the air outlet passage are respectively connected to the air compressor unit and the air expansion unit.

Further, isolation nets are provided at the first ventilation holes and the second ventilation holes, so as to block the heat storage material through the isolation nets.

Further, a plurality of communication cavities are opened on the bottom side wall of the vertical shaft, and a pressure cylinder is provided at the bottom of the communication cavities;

A lever is arranged in the communication cavity, one end of the lever is hinged with a crank, and the other end is located below the gravity block;

The bottom end of the crank is connected with a piston, the piston is movably inserted into the pressure cylinder, the piston and the pressure cylinder are sealed, and a sealing cavity is formed in the pressure cylinder below the piston, so The sealed cavity is filled with compressible gas, so that the piston is moved downward by passing gas into the gas storage cavity, so that one end of the lever is lifted upward to provide an upward auxiliary force to the gravity block.

Further, the pressure cylinder above the piston is filled with viscous pressure fluid, so as to realize the sealing between the piston and the pressure cylinder through the viscous pressure fluid.

Further, a support is provided in the communication cavity, and the lever is mounted on the support.

Further, an accommodating groove extending to the bottom surface is formed on the side wall of the bottom end of the casing, and one end of the lever extends into the accommodating groove.

Further, there are a plurality of the communication chambers, the levers in the plurality of communication chambers are equiangularly arranged on the peripheral side of the casing, and each of the communication chambers is provided with the pressure cylinder.

Further, the shaft is a cylindrical tubular structure;

The casing is a cylindrical structure, and a plurality of vertically distributed smooth grooves are arranged on the peripheral side of the outer wall surface of the casing;

The sealing film is an annular cylindrical structure sleeved on the outside of the casing, the outer diameter of the sealing film is equal to the inner diameter of the vertical shaft, and the sealing film is folded from the middle to form the outer ring and the upper part. The annular saddle surface structure formed by the connection of the inner ring, the inner ring obtained after folding is formed into a folded protrusion, the bottom end of the outer ring is sealed with the inner wall of the shaft, and the bottom end of the inner ring is connected to the inner wall of the shaft. The outer walls of the casing are sealed and connected, and the corrugated protrusions fit with the smooth grooves.

Further, the annular cylindrical structure of the sealing film is a cylindrical surface structure with equal diameters up and down.

Additional aspects and advantages of the present application will be set forth, in part, in the following description, and in part will be apparent from the following description, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of a partial structure of a gravity energy storage system with a buffering effect proposed in an embodiment of the present application;

FIG. 2 is a partial structural schematic diagram of the gravity energy storage system with buffering effect of the present application.

In the figure, 1, shaft; 11, air storage chamber; 12, communication chamber; 13, pressure cylinder; 14, sealing chamber; 15, viscous pressure fluid; 2, gravity block; 21, shell; 22, heat storage material; 23, the first vent hole; 24, the second vent hole; 25, the isolation net; 26, the accommodating groove; 27, the smooth groove; 28, the third vent hole; Ring; 4. Air compressor unit; 5. Air expansion unit; 6. Lever; 7. Crank; 8. Piston; 9. Support.

Detailed ways

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

FIG. 1 is a schematic structural diagram of a gravity energy storage system with buffer function proposed by an embodiment of the present application.

Referring to FIGS. 1 and 2, a gravity energy storage system with buffering function includes a shaft 1, a gravity block 2 is movably inserted in the shaft 1, and the gravity block 2 and the side wall of the shaft 1 are sealed and connected by a sealing film 3, An air storage cavity 11 is enclosed between the gravity block 2, the sealing membrane 3 and the space of the shaft 1 below the sealing membrane 3;

The gravity block 2 includes a casing 21 and a heat storage material 22 filled in the casing 21 . The bottom of the casing 21 is provided with a first ventilation hole 23 that communicates with the air storage cavity 11 , and the top of the casing 21 is connected with an air compressor unit 4 . and the air expansion unit 5, so that the high-temperature and high-pressure air obtained after being compressed by the air compressor unit 4 passes through the heat storage material 22 and stores the heat in the heat storage material 22, and then enters the air storage chamber 11 through the first ventilation hole 23, During the energy process, the compressed air in the air storage chamber 11 enters the shell 21 and then passes through the heat storage material 22 to absorb the heat stored in the heat storage material 22, and then enters the air expansion unit 5 to perform work, through the gravity block 2 itself Heat exchange can be realized without additional heat exchange unit for heat exchange, which saves space and cost.

In addition, the inner wall of the shaft 1 and the outer wall of the casing 21 are correspondingly wound with an array of conducting coils. The arrays of conducting coils on the inner wall of the shaft 1 are connected to different power sources in sequence. 1 The conductive coil array on the inner wall applies alternating current of a fixed frequency, and a reverse circulating current is induced in the conductive coil array on the outer wall of the housing 21, so that two sets of conductive coil arrays with opposite current directions form a reverse electromagnetic field, and the electromagnetic force Apply upward force to the gravity block 2. During the compression and energy storage process, it is necessary to use lifting measures to lift the gravity block 2 upward, and apply a fixed frequency alternating current to the coil array on the inner wall of the shaft 1 through the power supply. The outer wall of the gravity block 2 A reverse circulating current is induced in the coil of the air compressor. After the two sets of coils with opposite current directions form a reverse electromagnetic field, the gravity block 2 is moved upward through electromagnetic force, thereby reducing the lifting force required by the gravity block 2 at the moment of starting. At the same time, through the air compressor unit 4. The compressed gas is introduced into the air storage cavity 11, and the gravity block 2 moves up to the highest limit. During the energy release process, the gas in the air storage cavity 11 is passed into the air expansion unit 5 to perform work and power generation, and the gravity block 2 moves to the upper limit. Moving down, the gravitational potential energy of the gravity block 2 is also converted into part of the electric energy. In addition, when an accident occurs, the gravity block 2 accelerates downward uncontrollably, and the coil power supply on the inner wall of the shaft 1 is excited to quickly start the power supply and form an electromagnetic field. A reverse electromagnetic field is induced in the coil on the outer wall, forming an upward force on the gravity block 2, so that the gravity block 2 decelerates rapidly and reduces the kinetic energy of the impact on the bottom of the shaft 1 when falling.

In some embodiments, two second ventilation holes 24 are provided at the top of the housing 21 , and valves are provided at the two second ventilation holes 24 , and the two valves are respectively connected with an air inlet channel and an air outlet channel. The air outlet passages are respectively connected to the air compressor unit 4 and the air expansion unit 5, so that when the compressed air is ventilated into the casing 21, the valve at the inlet passage is opened, the valve at the outlet passage is closed, and the compressed air in the casing 21 is opened. After the air enters the housing 21, it enters the air storage chamber 11 through the first ventilation hole 23. When releasing energy, the valve at the intake passage is closed, and the valve at the outlet passage is opened. At this time, the compressed air in the air storage chamber 11 enters the air storage chamber 11. The casing 21 can only be passed into the air expansion unit 5 through the air outlet channel.

Since the housing 21 is filled with the heat storage material 22 , in order to prevent the heat storage material 22 from spilling from the first ventilation hole 23 and the second ventilation hole 24 , both the first ventilation hole 23 and the second ventilation hole 24 may be provided. The isolation net 25 is used to block the heat storage material 22 through the isolation net 25. In addition, the housing 21 can be divided into a cylinder body and a cover body. In addition, two second ventilation holes 24 are opened on the cover body, and the isolation net 25 is fixed at the first ventilation hole 23 and the two second ventilation holes 24. Due to the blocking of the isolation net 25, the heat storage material 22 can be prevented from spilling out, and the gas can also pass through the mesh holes on the isolation net 25.

In some embodiments, in order to make full use of the pressure of the compressed air in the air storage cavity 11 and realize the upward force on the gravity block 2, a plurality of communication cavities 12 may be opened on the bottom side wall of the shaft 1, and the bottom of the communication cavity 12 can be opened. A pressure cylinder 13 is provided, and a lever 6 is provided in the communication chamber 12. One end of the lever 6 is hinged with a crank 7, and the other end is located below the gravity block 2. The bottom end of the crank 7 is connected with a piston 8, and the piston 8 is movably inserted in the In the pressure cylinder 13 , the piston 8 is sealed with the pressure cylinder 13 , and a sealed cavity 14 is formed in the pressure cylinder 13 below the piston 8 . The piston 8 moves downward, so that one end of the lever 6 rises to provide an upward auxiliary force to the gravity block 2, that is, when the compressed air is introduced into the air storage chamber 11, the compressed air in the air storage chamber 11 passes through the communication chamber. 12 enters the pressure cylinder 13 above the piston 8, and the piston 8 moves downward under the pressure of the compressed air to compress the compressible gas in the pressure cylinder 13. According to the lever principle, the piston 8 is driven by the crank 7 during the downward movement. One end of the lever 6 moves downward, the other end of the lever 6 is lifted upward, and the lifted end acts on the gravity block 2 to exert an upward force on the gravity block 2 during the upward movement, which provides an auxiliary force for the upward start of the gravity block 2, which is convenient for The starting of the gravity block 2 can greatly increase the force on the upward movement of the gravity block 2 through the joint action of the lever 6 and the guide coil, and reduce the external force required for the upward movement of the gravity block 2 .

In some embodiments, the pressure cylinder 13 above the piston 8 is filled with a viscous pressure fluid 15, so as to realize the sealing between the piston 8 and the pressure cylinder 13 through the viscous pressure fluid 15. The sealing effect of the fluid is better, in the initial state When the pressure of the viscous pressure fluid acting on the piston 8 plus the air pressure in the air storage chamber 11 and the upward pressure of the compressible gas in the sealing chamber 14 on the piston 8 are balanced, the lever 6 is in a horizontal state.

In order to adapt to the work of the lever 6 in the communication cavity 12, a support 9 can be provided in the communication cavity 12, and the lever 6 is mounted on the support 9, that is to say, the lever 6 can be hinged on the support 9, so that the lever 6 and the The junction of the support 9 forms a fulcrum.

In some embodiments, the bottom end sidewall of the housing 21 is provided with a receiving groove 26 extending to the bottom surface. The receiving groove 26 may be an annular groove extending to the bottom outer wall of the housing 21 , so that the levers 6 in the plurality of communication cavities 12 are connected. One end of the lever 6 can extend into the accommodating groove 26. When the lever 6 is raised close to the end of the gravity block 2, it can directly act on the housing 21 in the accommodating groove 26 and exert an upward force on the gravitational block 2. In order to protect the shell The compressed air in the body 21 can still enter the air storage cavity 11 smoothly, the first ventilation hole 23 is directly perpendicular to the bottom of the casing 21, and a plurality of first ventilation holes 23 can be opened on the side wall of the first ventilation hole 23. The connected third ventilation holes 28, a plurality of third ventilation holes 28 are communicated with the air storage cavity 11, so that the compressed air in the housing 21 can enter the air storage cavity 11 through the first ventilation holes 23 and the third ventilation holes 28 middle.

In addition, the communication cavity 12 is arranged horizontally, and a section of the communication cavity 12 is formed vertically on the side wall of the shaft 1, and then a pressure cylinder 13 is opened on the ground at one end of the communication cavity 12 away from the shaft 1. The pressure cylinder 13 and the shaft 1 are both vertical straight setting.

In some embodiments, a plurality of communication cavities 12 may be provided, the levers 6 in the plurality of communication cavities 12 are equiangularly arranged on the peripheral side of the housing 21 , and each communication cavity 12 is provided with a pressure cylinder 13 . The levers 6 provided in the cavity 12 can also exert upward force on the gravity block 2, and because the levers 6 in the plurality of communication cavities 12 are arranged at the circumference of the gravity block 2 at equal angles, so that one end of the plurality of levers 6 is opposite to the gravity block 2. The upward auxiliary force is uniform. When there are multiple communicating chambers 12 , at this time, multiple accommodating grooves 26 can be correspondingly provided on the side wall of the bottom end of the gravity block 2 .

It should be noted that, there may be various arrangements of the sealing film in the shaft 1 .

As a possible situation, the shaft 1 is a cylindrical structure, the casing 21 is a cylindrical structure, and the peripheral side of the outer wall of the casing 21 is provided with a plurality of vertically distributed smooth grooves 27, wherein the vertical direction is the same as the The axial direction of the casing 21 is the same. The sealing film 3 is an annular cylindrical structure sleeved outside the casing 21. The outer diameter of the sealing film is equal to the inner diameter of the shaft 1. The annular saddle surface structure formed by the connection of the ring 31 and the inner ring 32, the inner ring 32 obtained after being folded forms a folded protrusion on the peripheral side, the bottom end of the outer ring 31 is sealed with the inner wall of the shaft 1, and the bottom end of the inner ring 32 is connected to the shell The outer wall of the body 21 is sealed and connected, and the wrinkled protrusions fit with the smooth grooves 27. Since the outer diameter of the casing 21 is smaller than the inner diameter of the sealing film, the inner ring 32 formed by the sealing film after folding is located inside the outer ring 31, and the sealing film The inner ring 32 has a cylindrical structure. In order to adapt to the size of the annular space, the inner ring 32 will have wrinkled protrusions. By setting the smooth grooves 27, the sealing film can sag the wrinkled protrusions in the smooth grooves 27 when it is fixed. In this way, the length of the contact between the outer wall of the casing 21 and the sealing film is increased, so that the length of the sealing film fixed on the peripheral side of the casing 21 is increased. When the casing 21 moves up and down, the outer ring 31 and the inner ring 32 of the sealing film are It always maintains a good fit with the inner wall of the shaft 1 and the outer wall of the housing 21, which improves the direct bonding site between the housing 21 and the sealing film, and improves the tight fit between the sealing film and the housing 21. The outer diameter of the sealing film is the same as the inner diameter of the shaft 1, so that the outer ring 31 of the sealing film can be completely attached to the inner wall of the shaft 1, so that the outer ring 31 of the sealing film and the shaft 1 are tightly combined, and the rigid wall is used to provide the sealing film. Rigid support improves the safety, reliability and life of the sealing film.

In addition, the annular cylindrical structure of the sealing film is a cylindrical surface structure with equal diameters up and down, which facilitates the processing of the sealing film.

In addition, after the smooth grooves 27 are arranged on the peripheral side of the casing 21, by controlling the depth and number of the smooth grooves 27, the circumferential circumference of the casing 21 at the smooth grooves 27 is increased (for example, the cylindrical body of the casing 21 is Cylindrical structure, the circumferential perimeter at the cross section perpendicular to the axis of the cylinder at the smooth groove 27 is the circumferential perimeter of the casing 21 at the smooth groove 27, and the circumferential perimeter of the outer wall of the sealing film is the seal The perimeter of the end face of the outer cylinder of the membrane ring-shaped tubular structure), the wrinkled raised part of the inner ring 32 can fit in the smooth groove 27, so that the inner ring 32 and the shell 21 fit together, and the wrinkled raised and smooth The grooves 27 fit together, and the casing 21 can support the sealing film, thereby improving the safety, reliability and life of the sealing film.

The specific gas storage method of a kind of gravity energy storage system with buffering effect recorded in the above embodiment is as follows:

In the initial state, the gravity of the viscous pressure liquid acting on the piston 8 plus the air pressure in the air storage chamber 11 and the upward pressure of the compressible gas in the sealing chamber 14 on the piston 8 are balanced, so that the lever 6 is in a horizontal state ;

When storing energy, the electric motor is energized to drive the air compressor unit 4 to compress the gas to do work, compress the normal temperature and normal pressure air to obtain high temperature and high pressure air, and the high temperature and high pressure air passes into the gravity block 2 and passes through the heat storage material 22 to store the heat in the heat storage material. The low temperature and high pressure gas is obtained in 22, the low temperature and high pressure gas is passed into the air storage chamber 11, and the compressed air in the air storage chamber 11 enters the pressure cylinder 13 through the communication chamber 12, and exerts downward pressure on the piston 8, so that the piston 8 is in the pressure cylinder 13. The pressure cylinder 13 moves downward. During the moving process, one end of the lever 6 is pulled by the crank 7 to move downward, and the other end of the lever 6 is lifted upward. During the lifting process, an upward auxiliary force is applied to the gravity block 2, and the shaft is supplied by the power supply. 1 The conductive coil array on the inner wall applies alternating current of a fixed frequency, and a reverse circulating current is induced in the conductive coil array on the outer wall of the housing 21, so that two sets of conductive coil arrays with opposite current directions form a reverse electromagnetic field, and the electromagnetic force Apply an upward force to the gravity block 2, and the gravity block 2 moves up to the highest limit. During the upward movement of the gravity block 2, the end of the lever 6 close to the gravity block 2 also moves up to a certain position and stops, maintaining the inclined state;

When releasing energy, the compressed gas in the air storage chamber 11 enters the gravity block 2, absorbs the heat stored in the heat storage material 22, and the obtained high-temperature and high-pressure gas enters the air expansion unit 5 through the air outlet channel to perform work, and drives the generator to generate electricity. The gravity block 2 moves downward. When the gravity block 2 moves to contact with the raised end of the lever 6, the gravity block 2 is supported and buffered by the raised end of the lever 6, so that the gravity block 2 can move down slowly. In the event of an accident, The gravity block 2 accelerates downward uncontrollably, and the coil power supply on the inner wall of the shaft 1 is excited to quickly start the power supply and form an electromagnetic field, and a reverse electromagnetic field is induced in the coil on the outer wall of the gravity block 2, forming an upward force on the gravity block 2, thereby The gravity block 2 is quickly decelerated, and the lever 6 also has a certain supporting effect on the gravity block 2, reducing the impact kinetic energy on the bottom of the shaft 1 when falling.

It should be noted that, in the description of the present application, the terms "first", "second" and the like are only used for the purpose of description, and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise specified, "plurality" means two or more.

Any description of a process or method in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a specified logical function or step of the process , and the scope of the preferred embodiments of the present application includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present application belong.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (9)

1. A gravity energy storage system with a buffering function is characterized by comprising a vertical shaft;

a gravity block is movably inserted in the vertical shaft, the gravity block is connected with the side wall of the vertical shaft in a sealing manner through a sealing film, and a gas storage cavity is defined by the gravity block, the sealing film and a space of the vertical shaft below the sealing film;

the gravity block comprises a shell and a heat storage material filled in the shell, a first vent hole communicated with the gas storage cavity is formed in the bottom of the shell, and an air compressor unit and an air expansion unit are connected to the top of the shell;

the inner wall of the vertical shaft and the outer wall of the shell are correspondingly wound with wire coil arrays, the wire coil arrays on the inner wall of the vertical shaft are sequentially connected with different power supplies, and each wire coil on the outer wall of the shell is closed, so that alternating current with fixed frequency is applied to the wire coil arrays on the inner wall of the vertical shaft through the power supplies, reverse circulation currents are induced in the wire coil arrays on the outer wall of the shell, and after two groups of opposite current direction wire coil arrays form reverse electromagnetic fields, upward acting force is applied to the gravity block through electromagnetic force;

a plurality of communicating cavities are formed in the side wall of the bottom of the vertical shaft, and pressure cylinders are arranged at the bottoms of the communicating cavities;

a lever is arranged in the communicating cavity, one end of the lever is hinged with a crank, and the other end of the lever is positioned below the gravity block;

the bottom end of the crank is connected with a piston, the piston is movably inserted into the pressure cylinder, the piston and the pressure cylinder are sealed, a sealed cavity is formed in the pressure cylinder below the piston, and compressible gas is filled in the sealed cavity so as to drive the piston to move downwards by introducing gas into the gas storage cavity, so that one end of the lever is lifted upwards to provide upward auxiliary force for the gravity block.

2. The gravity energy storage system with buffering effect according to claim 1, wherein two second ventilation holes are formed in the top of the housing, valves are disposed at the two second ventilation holes, an air inlet channel and an air outlet channel are connected to the two valves, and the air inlet channel and the air outlet channel are connected to the air compressor unit and the air expander unit respectively.

3. The gravity energy storage system with a buffering effect according to claim 2, wherein an isolation mesh is arranged at each of the first vent hole and the second vent hole, so that the heat storage material is blocked by the isolation mesh.

4. The gravity energy storage system with a buffering effect according to claim 1, wherein the pressure cylinder above the piston is filled with a viscous pressure fluid to achieve sealing between the piston and the pressure cylinder by the viscous pressure fluid.

5. The gravity energy storage system with a buffering effect according to claim 1, wherein a seat is provided in the communicating chamber, and the lever is mounted on the seat.

6. The gravity energy storage system with a buffering effect according to claim 1, wherein the bottom end side wall of the housing is provided with a receiving groove extending to the bottom surface, and one end of the lever extends into the receiving groove.

7. The gravity energy storage system with a buffering action according to claim 1, wherein levers in a plurality of said communication chambers are disposed at equal angles on a peripheral side of said housing, and said pressure cylinder is disposed in each of said communication chambers.

8. The gravity energy storage system with a buffering effect according to claim 1, wherein the shaft is of a cylindrical barrel structure;

the shell is of a cylindrical structure, and a plurality of smooth grooves which are vertically distributed are formed in the periphery of the outer wall surface of the shell;

the seal membrane is established for the cover the outside annular tubular structure of casing, the external diameter of seal membrane equals the internal diameter of shaft, the seal membrane turns over the annular saddle face structure that forms with the inner ring after turning over the upper portion inwards from the centre, turns over the back and obtains the inner ring week side forms the fold arch, the bottom of outer loop with shaft inner wall sealing connection, the bottom of inner ring with the outer wall sealing connection of casing, the fold arch with level and smooth groove laminating.

9. The gravity energy storage system with the buffering function according to claim 8, wherein the annular cylindrical structure of the sealing membrane is a cylindrical surface structure with the upper diameter and the lower diameter being equal.

Images