A gravity energy storage system based on electromagnetic technology

Abstract

This invention proposes a gravity energy storage system based on electromagnetic technology, comprising several weights, a deep wellbore for vertical movement of the weights, and a motor located outside the wellhead. A steel cable is wound around the motor's output shaft, and the weights can be stacked and threaded onto the cable. As the weights move downwards, they drive the motor's output shaft to rotate and generate electricity. Weight coils are arranged on the weights, and these coils are connected to energy storage units. Several wellbore coils are arranged inside the deep wellbore. The weight coils can move vertically relative to the wellbore coils to cut them, generating induced current that is stored in the energy storage units. During peak electricity demand, influenced by gravitational potential energy, the weights move from the wellhead to the bottom of the wellbore, driving the motor to generate electricity. Simultaneously, the weight coils cut the magnetic field lines generated by the wellbore coils, generating induced current for energy storage. This invention utilizes electromagnetic technology for gravity energy storage, effectively improving the economy and universality of energy conversion and reducing energy loss.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gravity energy storage, and particularly relates to a gravity energy storage system based on electromagnetic technology. BACKGROUND

[0002] The gravity energy storage technology promotes the construction of a clean, low-carbon, safe and efficient new energy system, and has the advantages of flexible arrangement, strong universality, high energy storage efficiency (80%-90%), and long operation time (30-50 years).

[0003] CN202010199858.0 discloses a post-mining waste shaft gangue gradient gravity energy storage system, which uses two waste mine shafts as energy storage and release channels, and uses gangue as a mass block to realize the secondary utilization of the waste mine shaft and the gangue. The system uses the height difference to fill the mine car on the ground or the high-position mine car underground with gangue, and according to the required power generation, the mine car is lowered to the underground yard at a suitable height through the shaft lifting device. When generating electricity, the system only simply converts the gravitational potential energy of the gangue-filled mine car into electrical energy, and the energy conversion is low in economy. SUMMARY

[0004] The present application aims to solve the technical problems existing in the prior art, and the purpose of the present application is to provide a gravity energy storage system based on electromagnetic technology.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a gravity energy storage system based on electromagnetic technology, comprising a plurality of vertically stackable heavy blocks, a deep shaft for vertical movement of the heavy blocks, and a motor located outside the shaft mouth of the deep shaft, a steel rope is wound on the output shaft of the motor, and the heavy blocks can be overlapped and arranged on the steel rope; when the heavy blocks move from top to bottom, the output shaft of the motor can be driven to rotate to generate electricity; the heavy blocks are arranged outside or inside the heavy blocks, and the heavy block coil is directly or indirectly connected with the power storage unit; a plurality of shaft coils are vertically arranged in the deep shaft, and the heavy block coil can move vertically relative to the shaft coil to cut the shaft coil to generate induced current and store it in the power storage unit.

[0006] In the above technical solution, during the power consumption peak, the heavy block coil is connected with the power storage unit, and under the influence of gravitational potential energy, the heavy block moves from the shaft mouth to the bottom of the deep shaft, driving the motor to generate electricity. At the same time, the shaft coil is connected with the power supply, and the magnetic induction lines generated by the cutting of the shaft coil by the heavy block coil generate induced current to store electricity. During the power consumption valley, the motor drives the steel rope to lift the heavy block from the bottom of the deep shaft to the shaft mouth to store gravitational potential energy. The present application uses electromagnetic technology for gravity energy storage, not only drives the motor to generate electricity by the falling of the heavy block, but also generates electricity by the cutting of the shaft coil by the heavy block coil when the heavy block falls, which can effectively improve the economy and universality of energy conversion and reduce energy loss.

[0007] In a preferred embodiment of the present application, each weight coil has two metal contacts, the weight coil of the uppermost weight is electrically connected to the power storage unit through its two metal contacts, and the weight coil of the lower weight can be cross-connected to the weight coil of the upper weight through its two metal contacts; and / or each shaft coil has two metal contacts, the uppermost shaft coil is electrically connected to the power source through its two metal contacts, and the lower shaft coil can be cross-connected to the upper shaft coil through its two metal contacts.

[0008] In the above technical solution, the flow directions of the induced currents generated by the weight coils are unified.

[0009] In a preferred embodiment of the present application, two weight coils in the same loop are symmetrically arranged on the two side walls of each weight, all the weight coils of the weights can be vertically arranged in two rows and located in the same loop, and two rows of shaft coils are also symmetrically arranged on the two sides of the deep shaft; and / or the shaft coil is an open "8" shaped coil arranged vertically, and the weight coil is arranged in parallel with the open "8" shaped coil.

[0010] In the above technical solution, the weight coils are arranged on the two side walls of the weight, and the weight does not deviate from the horizontal plane when the weight coils cut the shaft coils downward. The shaft coil is an open "8" shaped coil, which has a simple structure and is easy to manufacture.

[0011] In a preferred embodiment of the present application, the open "8" shaped coil is a rectangular coil, which is divided into upper and lower parts by a vertical line in the vertical side, and the upper part is turned over 180° to form two half open "8" shaped coils with equal areas; the weight coil on one side of the weight is a vertically arranged rectangular coil, and the length and width of each half open "8" shaped coil are equal to those of the weight coil.

[0012] In a preferred embodiment of the present application, the spacing between adjacent open "8" shaped coils is consistent with the spacing between each half open "8" shaped coil.

[0013] In the above technical solution, the consistency of the spacing between adjacent magnetic fields is ensured.

[0014] In another preferred embodiment of the present application, a plurality of groups of closed coils corresponding to the shaft coils are arranged transversely in the deep shaft, and each group of closed coils can be arranged around the shaft coil and the weight coil.

[0015] In the above technical solution, the closed coils are arranged to control the deviation of the weight during downward movement.

[0016] In another preferred embodiment of the present application, the set of closed loops comprises two horizontally arranged closed "8" shaped loops, the two closed "8" shaped loops are rotated 180° along the plane where the center point of the deep well is located, and the two closed "8" shaped loops are connected by two wires.

[0017] In the above technical solution, when the movement of the weight occurs along the horizontal plane, the two closed "8" shaped loops will generate unequal current, and thus, the two closed "8" shaped loops will generate unequal magnetic field, and the weight coil near the closed "8" shaped loop will generate greater repulsive force, so as to make the weight close to the horizontal midpoint.

[0018] In another preferred embodiment of the present application, the top of the weight has outward protruding non-circular protrusions, and the bottom of the weight has inward protruding concave holes capable of engaging with the protrusions; the lower end of the steel rope is fixedly connected with a limiting block, and the top of the limiting block is capable of engaging with the concave hole of the lowermost weight.

[0019] In the above technical solution, the two adjacent weights are engaged by the protrusions and the concave holes, so that the weights can be accumulated in multiple stable states; the limiting block is engaged with the concave hole on the lower surface of the lowermost weight, so as to drive the weight to move upward.

[0020] In another preferred embodiment of the present application, the motor is a magnetic suspension motor, which can be used as a magnetic suspension motor to drive power consumption, or as a magnetic suspension generator to generate power by the weight descending; and / or the number of the motors is two, the two motors are radially symmetrically distributed on both sides of the deep well along the well mouth, and the output shafts of the two motors are coaxially fixed.

[0021] In the above technical solution, the magnetic suspension motor can generate power and drive power consumption, and does not need to be separately provided with a power generation device, thereby simplifying the system structure; the two motors can improve the stability when the weight rises and prolong the service life of the output shaft of the motor.

[0022] In another preferred embodiment of the present application, the magnetic suspension motor comprises a housing, a rotatable rotor having an output shaft axially passing through the center of the housing and extending out of the housing, and a stator assembly fixed to the housing and arranged around the outer periphery of the rotor, the rotor is fixed with a disc extending radially outward, the disc is fixed with an annular permanent magnet matched with the stator assembly, and the current generated by the stator assembly can drive the annular permanent magnet to rotate around the axis of the rotor to make the rotor rotate; the magnetic suspension motor further comprises at least one of the following structures: structure one: an outwardly convex surface-shaped permanent magnet is arranged around the disc and fixed thereto, a concave surface-shaped permanent magnet is fixed in the housing and matched with the convex surface-shaped permanent magnet, the concave surface-shaped permanent magnet is arranged around the convex surface-shaped permanent magnet and coaxial with the convex surface-shaped permanent magnet, and the concave surface-shaped permanent magnet and the convex surface-shaped permanent magnet have a gap therebetween and their magnetism is opposite; structure two: a first cylindrical permanent magnet is arranged around the rotor and fixed thereto, a second cylindrical permanent magnet is fixed in the housing and arranged around the first cylindrical permanent magnet and coaxial with the first cylindrical permanent magnet, and the first cylindrical permanent magnet and the second cylindrical permanent magnet have a gap therebetween and their magnetism is opposite.

[0023] In the structure one, the concave surface-shaped permanent magnet and the convex surface-shaped permanent magnet are arranged to make the rotor in a suspended state in the axial and radial directions, so that the energy loss and noise pollution caused by friction of the rotor can be reduced; in the structure two, the first cylindrical permanent magnet and the second cylindrical permanent magnet are arranged to make the rotor in a suspended state in the radial direction, so that the magnetic force of the rotor in the radial direction is increased and the rotor is more stable in the radial direction.

[0024] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 is a perspective structural schematic view of an industrial automation gravity energy storage system according to Embodiment One of the present application.

[0027] Figure 2 is a top view structural schematic view of an industrial automation gravity energy storage system according to Embodiment One of the present application.

[0028] Figure 3 is a structural schematic view of a weight block according to Embodiment One of the present application.

[0029] Figure 4 is a structural schematic view of an electromagnetic technology-based gravity energy storage system according to Embodiment Two of the present application.

[0030] Figure 5This is a schematic diagram of the structure of the weighted coil, the well coil, and the closed coil in Embodiment 2 of this application.

[0031] Figure 6 This is a schematic diagram of the internal structure of the motor in Embodiment 2.

[0032] Figure 7 This is a structural schematic diagram of the motor viewed from the inside in Embodiment 2.

[0033] The reference numerals in the accompanying drawings include: motor 10, motor output shaft 101, cylindrical housing 111, circular outer cover 112, through hole 113, locking bolt 114, rotor 12, disc 121, annular permanent magnet 122, stator assembly 13, stator 131, silicon steel sheet 132, stator coil 133, armature 134, convex permanent magnet 141, concave permanent magnet 142, first cylindrical permanent magnet 143, second cylindrical permanent magnet 144, steel rope 20, limit block 21, weight 30, trapezoidal hole 301, notch 302, central shaft hole 303, magnet 304, uppermost weight 31, uppermost weight coil 311, middle weight 32, middle weight coil 321, lowermost weight 33, lowermost weight... 331, square weight coil, 34, protruding nail, 35, concave hole, 36, energy storage unit, 37, metal contact, deep well shaft, 41, uppermost well shaft coil, 411, middle well shaft coil, 412, lowermost well shaft coil, 413, closed coil, 414, wire, 415, shallow well shaft, 42, deep well transmission device, 50, first support seat, 51, first roller, 52, shallow well transmission device, 60, second support seat, 61, second roller, 62, movable block, 63, floating spring, 64, bolt, 65, main transmission track, 71, branch transmission track, 72, support platform, 80, upper gasket, 81, smooth metal ring, 82, spring, 83, through rod, 84, lower gasket, 85, direction adjustment device, 90, rotating ring, 91, permanent magnet, 92, magnetometer, 94. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote 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 invention, and should not be construed as limiting the present invention.

[0035] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0037] Example 1

[0038] This embodiment provides an industrial automated gravity energy storage system, such as... Figures 1-2 As shown, in a preferred embodiment, the gravity energy storage system includes a plurality of weight blocks 30 that can be stacked vertically with equal weight and height, a deep well 41 for vertical movement of the plurality of weight blocks 30, a motor 10 located outside the wellhead of the deep well 41, a plurality of shallow wells 42 for dispersing the plurality of weight blocks 30, a main transport track 71 connecting the deep well 41 and the shallow wells 42 for transporting the weight blocks 30, and a plurality of transport devices. The main transport track 71 can be a conveyor belt, conveyor rollers, or conveyor chain that relies on friction to transport items in the prior art.

[0039] Both the deep shaft 41 and the shallow shaft 42 are equipped with support platforms 80 for supporting the weights 30. A steel rope 20, which is a high-strength steel rope, is wound around the output shaft 101 of the motor. The lower end of the steel rope 20 is connected to the support platform 80 in the deep shaft 41. Several weights 30 can be threaded onto the steel rope 20 and stacked on the support platform 80 below it. Several weights 30 can move freely in the deep shaft 41 or be lifted upward together with the support platform 80.

[0040] The transmission device includes a deep well transmission device 50 located at the wellhead of the deep well 41 and a shallow well transmission device 60 located at each shallow well 42. The deep well transmission device 50 enables the weight 30 to be transferred between the support platform 80 of the deep well 41 and the main transmission track 71 connected to the deep well 41, and the shallow well transmission device 60 enables the weight 30 to be transferred between the support platform 80 of the shallow well 42 and the main transmission track 71 connected to the shallow well 42.

[0041] In this invention, the motor 10 is a magnetic levitation motor. The motor 10 can be used as a power-consuming drive for the magnetic levitation motor, or it can be used as a magnetic levitation generator 10 driven by the descent of the weight 30 to generate electricity. Preferably, there are two motors 10, which are symmetrically distributed on both sides of the deep wellbore 41 along the radial direction of the wellhead. The output shafts 101 of the two motors are coaxially fixed. Specifically, the two motors 10 can share a single output shaft, or the output shafts 101 of the two motors can be separately installed and then fixed together as one unit.

[0042] Using this technical solution, during peak electricity demand, several weights 30 fall freely from top to bottom within the deep wellbore 41, driving the motor 10 to generate and store energy. This process converts the gravitational potential energy of the weights 30 into electrical energy. During off-peak electricity demand, the motor 10 is energized, driving the steel cable 20 to wind. The steel cable 20 lifts several weights 30 from bottom to top within the deep wellbore 41 to store their gravitational potential energy. Furthermore, during off-peak electricity demand, this gravity energy storage system also needs to assemble and unassemble the weights 30.

[0043] Before the weight 30 is installed, several weights 30 are stored separately in several shallow well cylinders 42. When the weight 30 is installed, the weights 30 are stacked on the support platform 80 of the shallow well cylinder 42. The support platform 80 pushes the weights 30 into the shallow well transmission device 60. The weights 30 are transferred and transported by the shallow well transmission device 60 to the main transmission track 71. The main transmission track 71 drives the weights 30 to move to the deep well transmission device 50. Then the deep well transmission device 50 embeds the weights 30 into the steel rope 20 and places it on the support platform 80 of the deep well cylinder 41.

[0044] When the heavy block 30 is unloaded, the support platform 80 in the deep well shaft 41 pushes the heavy block 30 into the deep well transfer device 50. The heavy block 30 is then transferred and transported by the deep well transfer device 50 to the main transfer track 71. The main transfer track 71 drives the heavy block 30 to the shallow well transfer device 60, and then the shallow well transfer device 60 transfers and transports the heavy block 30 to the support platform 80 in the shallow well shaft 42.

[0045] In this invention, the deep wellbore 41 is very deep, reaching up to 1000m, and the height of the accumulated weights 30 in the deep wellbore 41 is tens of meters, such as 20m. These weights 30 store energy within the deep wellbore 41, while the shallow wellbore 42 is used to disperse and store the weights 30. The total height of the weights 30 in multiple shallow wellbores 42 is equal to the total height of the weights 30 in a single deep wellbore 41 used for gravity energy storage. Because deep wellbores 41 are scarce and difficult to construct, they can be used from abandoned wellbores on-site. Shallow wellbores 42 are easier to construct and can be built on a large scale, allowing for the dispersed storage of a large number of weights 30 required for gravity energy storage.

[0046] In this invention, preferably, the wellhead of the deep well shaft 41 is repaired to be 5m or 10m above the ground, forming a horizontal drop with the ground. This drop height can be used as the accumulated height when the weight 30 is stored. The shallow well shaft 42 can be a shallow foundation pit or a cement cylindrical structure built on the ground. This cylindrical structure is based on the ground and has the same drop height as the wellhead of the deep well shaft 41 and the ground. At the same time, in order to save materials and ensure that the stored weight 30 does not tip over, the cylindrical structure has a large area of ​​hollowing out in the vertical direction, forming a structure with multiple arc-shaped plates to frame the weight 30.

[0047] like Figure 1 and Figure 2 As shown, in another preferred embodiment, a transmission branch track 72 is also connected in parallel to the main transmission track 71. The transmission branch track 72 has the same structure as the main transmission track 71 and also relies on friction to transport items. The end of the transmission branch track 72 away from the main transmission track 71 is connected to a shallow well shaft 42. The opening of the shallow well shaft 42 is also provided with a shallow well transmission device 60 that enables the weight 30 to be transferred and transported between the support platform 80 of the shallow well shaft 42 and the main transmission track 71 connected to the shallow well shaft 42. The beginning of the connection between the transmission branch track 72 and the main transmission track 71 is provided with a track transmission device for transferring and transporting the weight 30 between the two. The track transmission device has the same structure as the deep well transmission device 50.

[0048] It should be noted that the transfer and transportation of the heavy block 30 between the shallow wellbore 42 and the transmission support track 72, as well as the transfer and transportation of the heavy block 30 between the main transmission support track and the transmission support track 72, are the same as described above and will not be repeated here.

[0049] like Figure 2 As shown, in this invention, the main transmission track 71 is fan-shaped with arc-shaped blades, and multiple arc-shaped transmission branch tracks 72 can be distributed on the main transmission track 71. The center lines of the main transmission track 71 and the transmission branch tracks 72 intersect with the centers of the deep well shaft 41 and the shallow well shaft 42.

[0050] like Figure 3As shown, in this invention, the weight 30 can be circular, square, or strip-shaped, for example, circular. Each weight 30 has a vertically penetrating central shaft hole 303, and also has a horizontally (radially) notch 302 communicating with the central shaft hole 303, allowing the steel rope 20 to pass through the notch 302 and be positioned within the central shaft hole 303. Preferably, the weight 30 also has several vertically penetrating trapezoidal holes 301, with the upper end larger than the lower end, making the weight 30 a hollow structure. This results in greater air resistance during the weight 30's descent, reducing the increase in kinetic energy and thus minimizing damage to the steel rope 20 and the motor's output shaft 101. Furthermore, the hollow structure of the weight 30 reduces air resistance and lowers power consumption during its upward lifting process.

[0051] In this invention, the lower end of the support platform 80 in the shallow wellbore 42 abuts against the bottom of the shallow wellbore 42, and the support platform 80 in the deep wellbore 41 can be suspended in the deep wellbore 41 by steel rope 20. The support platform 80 is a vertically extendable elastic structure. When the support platform 80 is in its natural state (i.e., there is no weight 30 on the support platform 80), the support platform 80 can partially extend outside the wellhead of the deep wellbore 41 / shallow wellbore 42. For example, when the support platform 80 is in its natural state, the upper surface of the support platform 80 is higher than the upper surface of the wellhead of the deep wellbore 41 / shallow wellbore 42 by 0.5 times the height of the weight 30. The elastic modulus of the support platform 80 is equal to the ratio of the weight of the weight block 30 to the height of the weight block 30, so that when the support platform 80 is subjected to the load of the weight block 30, the descent height of the support platform 80 is consistent with the cumulative height of the weight block 30, and the upper surface of the uppermost weight block 31 is always 0.5 times the height of the weight block 30 above the upper surface of the wellhead of the deep well 41 / shallow well 42.

[0052] Specifically, such as Figure 1 As shown, the support platform 80 in the shallow well shaft 42 includes an upper gasket 81 and a lower gasket 85 disposed opposite each other, and a spring 83 located between the upper gasket 81 and the lower gasket 85. The spring 83 is a vertically arranged columnar spring. Several weights 30 can be stacked on the upper gasket 81. The upper end of the spring 83 is welded to the upper gasket 81, and the lower end of the spring 83 is welded to the lower gasket 85.

[0053] like Figure 1 As shown, the support platform 80 in the deep well shaft 41 also includes a vertically arranged through rod 84 welded to the middle of the lower gasket 85. Multiple springs 83 are evenly arranged on the outer circumference of the through rod 84. The upper end of the through rod 84 passes through a hole in the middle of the upper gasket 81 and connects to the lower end of the steel rope 20 (e.g., hinged). The weight 30 can be mounted on the through rod 84. Preferably, a smooth metal ring 82 is fixedly connected to the hole in the upper gasket 81, and the through rod 84 passes through the smooth metal ring 82 and can slide vertically within it.

[0054] Because the weight 30 moves on the main transport track 71 and the support transport track 72 by friction, the notch 302 of the weight 30 may not be aligned with the steel cable 20. For example... Figure 1 and Figure 2 As shown, in another preferred embodiment of the present invention, a directional device 90 is further provided between the deep wellbore 41 and the main transport track 71. The directional device 90 can rotate the weight 30 so that its notch 302 is aligned with the steel cable 20. The deep well transport device 50 can transfer and transport the weight 30 between the support platform 80 of the deep wellbore 41 and the directional device 90. The transport device also includes a remote well transport device that can transfer and transport the weight 30 between the directional device 90 and the main transport track 71. The structure of the remote well transport device is the same as that of the deep well transport device 50.

[0055] Specifically, such as Figures 1-3 As shown, the directional adjustment device 90 includes a rotating ring 91 disposed adjacent to the outer side of the wellhead of the deep wellbore 41. A weight 30 can be placed on the rotating ring 91. Above the rotating ring 91 is a bar-shaped permanent magnet 92 located between the deep well transfer device 50 and the distant well transfer device. The permanent magnet 92 extends in the front-to-back direction. A magnet 304, which is a bar-shaped permanent magnet, is embedded in the weight 30. The magnet 304 is disposed perpendicular to the notch 302. The permanent magnet 92 can generate a magnetic force on the magnet 304 to rotate the weight 30. The directional adjustment device 90 also includes a magnetometer 93 for detecting the magnetic field strength and direction, and a rotating shaft 94 for pushing the weight 30 on the rotating ring 91 into the deep well transfer device 50. The magnetic induction line threshold output terminal of the magnetometer 93 is connected to the enable terminal of the rotating shaft 94.

[0056] Using the aforementioned technical solution, when the weight 30 enters the deep well shaft 41 from the main transport track 71, the weight 30 is transported to the rotating ring 91 by the remote well transport device. The magnet 304 on the weight 30 is attracted by the permanent magnet 92 and its direction is adjusted. After the magnetometer 93 senses the magnetic induction line threshold (at this time, the permanent magnet 92 is parallel to the magnet 304, and the notch 302 of the weight 30 is located on the left side), the rotating shaft 94 is controlled to insert into the central shaft hole 303 of the weight 30, and the weight 30 is guided into the deep well transport device 50, and then transported by the deep well transport device 50 to the support platform 80 of the deep well shaft 41.

[0057] like Figure 1 and Figure 2As shown, in this invention, the deep well transfer device 50 includes two first support seats 51 symmetrically arranged on the front and rear sides of the wellhead of the deep well casing 41. The two first support seats 51 are respectively located on both sides of the main transfer track 71. A row of vertically arranged frustum-shaped first rollers 52 are rotatably installed on the inner sides of the two first support seats 51. The first rollers 52 are rotatable and the position of their center lines is fixed. The row of first rollers 52 is arranged sequentially from the deep well casing 41 side to the main transfer track 71, with the structure of large upper surface radius and small lower surface radius, to upper surface radius equal to lower surface radius, and finally small upper surface radius and large lower surface radius. The upper surface of the row of first rollers 52 gradually decreases and the lower surface gradually increases from the deep well casing 41 side to the main transfer track 71.

[0058] Using the above technical solution, when the weight 30 is transferred from the deep well shaft 41 to the main transfer track 71, under the action of the spring 83 of the support platform 80, the uppermost weight 30 is pushed onto the first roller 52 of the deep well transfer device 50, which has a larger upper surface radius and a smaller lower surface radius. The first roller 52 rotates, and under the friction of the two rows of first rollers 52, the weight 30 moves towards the rotating ring 91. When it passes the first roller 52 with a smaller upper surface radius and a larger lower surface radius, the weight 30 gradually rises and separates from the threaded rod 84 and the steel rope 20, and then falls onto the rotating ring 91. The second weight 30 goes through the above stage and pushes the first weight 30 into the far well transfer device. The process of the weight 30 being transferred from the far well transfer device to the main transfer track 71 is the same as that of the transfer from the deep well transfer device 50 to the rotating ring 91, and will not be described again here.

[0059] It should be noted that the process of the heavy block 30 being transferred from the main transfer rail 71 to the support platform 80 of the deep well 41 is the reverse of the above, and will not be described in detail here.

[0060] like Figure 1 and Figure 2As shown, in this invention, the shallow well transmission device 60 includes two second support seats 61 symmetrically arranged on both sides of the wellhead of the shallow well shaft 42. The two second support seats 61 are located on both sides of the main transmission track 71 / transmission branch track 72. A movable block 63 is horizontally rotatably connected to the second support seat 61 through a vertically arranged rotating shaft 65. A floating spring 64 is fixedly connected to the outer end of the movable block 63. The outer end of the floating spring 64 is fixedly connected to the second support seat 61. The rotating shaft 62 is a bolt threadedly connected to the second support seat 61 through the vertical line of the movable block 63. This bolt can serve as both a rotating shaft and a fixation point for the movable block 63. A row of vertically arranged frustum-shaped second rollers 62 are rotatably installed on the inner sides of the two movable blocks 63. The second rollers 62 can rotate on their own, and the position of the center line of the second rollers 62 is not fixed. The second rollers 62 rise and fall due to the undulation of the movable blocks 63. A row of second rollers 62 is arranged from the shallow shaft 42 side to the main transmission track 71 / transmission branch track 72 in the following order: the upper surface radius is large and the lower surface radius is small, the upper surface radius is equal to the lower surface radius, and finally the upper surface radius is small and the lower surface radius is large. The upper surface of the row of second rollers 62 gradually decreases and the lower surface gradually increases from the shallow shaft 42 side to the main transmission track 71 / transmission branch track 72.

[0061] Using the above technical solution, when the weight 30 is transferred from the shallow well shaft 42 to the main transfer track 71 / transfer branch track 72, under the action of the spring 83 of the support platform 80, the uppermost weight 30 is pushed onto the second roller 62 of the shallow well transfer device 60, which has a larger upper surface radius and a smaller lower surface radius. The second roller 62 rotates, and under the friction of the two rows of second rollers 62, the weight 30 moves forward. When it passes the second roller 62 with a smaller upper surface radius and a larger lower surface radius, the weight 30 is gradually lifted upward and finally falls off the shallow well transfer device 60 and enters the main transfer track 71 / transfer branch track 72. When the first weight 30 has not yet fallen off the shallow well transmission device 60, the spacing between the second rollers 62 on the side near the shallow well cylinder 42 is small and insufficient to continuously transmit the second weight 30. As the support platform 80 pushes the second weight 30 up, the spacing between the second rollers 62 on the side near the shallow well cylinder 42 is increased, allowing the weight 30 to be transmitted normally. This ensures the interval distance of the weight 30 transmission and provides time for the adjusting device 90 to adjust the direction of the weight 30.

[0062] Example 2

[0063] This embodiment provides a gravity energy storage system based on electromagnetic technology, such as Figure 4 and Figure 5As shown, in this embodiment, the gravity energy storage system includes several vertically stackable weights 30, a deep wellbore 41 for vertical movement of the weights 30, and a motor 10 located outside the wellhead of the deep wellbore 41. A steel cable 20 is wound around the output shaft 101 of the motor. The weights 30 can be stacked and threaded onto the steel cable 20. When the weights 30 move from top to bottom, they can drive the output shaft 101 of the motor to rotate and generate electricity. When the number of weights 30 is greater than or equal to three, the weights 30 are divided into an uppermost weight 31, a lowermost weight 33, and an intermediate weight 32 located between the uppermost weight 31 and the lowermost weight 33.

[0064] The weight block 30 is also equipped with weight block coils on its exterior or inside. When the number of weight block coils is greater than or equal to three, the weight block coils are divided into the uppermost weight block coil 311, the lowermost weight block coil 331, and the intermediate weight block coil 321 located between the uppermost weight block coil 311 and the lowermost weight block coil 331. The weight block coils are directly or indirectly connected to the energy storage unit 36. For example, the uppermost weight block coil 311 is connected to the energy storage unit 36, or it is indirectly connected to the energy storage unit 36 ​​through the lines on other weight blocks 30.

[0065] Several vertically arranged well coils are arranged inside the deep well 41. When the number of well coils is greater than or equal to three, the several well coils are divided into the uppermost well coil 411, the lowermost well coil 413, and the intermediate well coil 412 located between the uppermost well coil 411 and the lowermost well coil 413. The weighted coil can move vertically relative to the well coil to cut the well coil and generate induced current, which is stored in the energy storage unit 36.

[0066] In this embodiment, the motor 10 is also a magnetic levitation motor. The motor 10 can be used as a power-consuming drive for the magnetic levitation motor, or it can be used as a magnetic levitation generator 10 driven by the descent of the weight 30 to generate electricity. Preferably, there are two motors 10, which are symmetrically distributed on both sides of the deep wellbore 41 along the radial direction of the wellhead. The output shafts 101 of the two motors are coaxially fixed. Specifically, the two motors 10 can share a single output shaft, or the output shafts 101 of the two motors can be separately set and then fixed together as one unit.

[0067] Using this technical solution, during peak electricity demand, the steel cable 20 is laid out, and the weight 30, influenced by gravitational potential energy, moves from the wellhead of the deep well 41 to the bottom, driving the output shaft 101 of the motor to rotate and generate electricity. Simultaneously, the well coil is connected to the power supply 415; for example, the uppermost well coil 411 is connected to the power supply 415. The weight coil moves relative to the well coil, and the weight coil cuts the magnetic induction lines generated by the well coil, thus generating an induced current for electricity storage. At the same time, the well coil forms a magnetic field, creating upward electromagnetic resistance for the weight coil, reducing the kinetic energy of the weight 30 and, to some extent, reducing damage to the steel cable 20. During off-peak electricity demand, the motor 10 drives the steel cable 20 to wind, lifting all the weights 30 from the bottom of the deep well 41 to the wellhead to store the gravitational potential energy of the weights 30.

[0068] like Figure 4 As shown, in this invention, the top center of the weight 30 has an upwardly protruding non-circular protrusion 34, and the bottom of the weight 30 has an upwardly protruding concave hole 35 that can fit with the protrusion 34, allowing multiple weights 30 to be stably accumulated. For example, the protrusion 34 is a regular hexagonal protrusion, and correspondingly, the concave hole 35 is a regular hexagonal blind hole. The lower end of the steel rope 20 is fixedly connected to a limiting block 21, the top of which can fit with the concave hole 35 of the bottom weight 33. The limiting block 21 is a regular hexagonal prism iron block that matches the concave hole 35. The output shaft 101 of the motor is vertically connected to the top weight 31, the middle weight 32, the bottom weight 33, and the limiting block 21 in sequence via the steel rope 20.

[0069] like Figure 4 and Figure 5 As shown, in this invention, two weight coils located in the same circuit are symmetrically arranged on the left and right side walls of each weight 30, and the weight coils of all weights 30 can be arranged vertically in two rows and located in the same circuit; two rows of well coils are also symmetrically arranged on the left and right sides of the deep well 41, preferably the two rows of well coils are located in two circuits respectively, and the uppermost well coils 414 on both sides are respectively connected to the power supply 415.

[0070] In this invention, such as Figure 4 and Figure 5As shown, the wellbore coil is a vertically arranged open figure-eight coil. The weighted coil is arranged parallel to the open figure-eight coil, and each open figure-eight coil is arranged vertically with a small spacing. To improve the electromagnetic field strength, several open figure-eight coils can be composed of a large number of overlapping wires. The open figure-eight coil is a rectangular coil divided into upper and lower parts by the vertical midline. The upper part is rotated 180° to form two half-open figure-eight coils of equal area. The spacing between two adjacent open figure-eight coils is the same as the spacing between each half-open figure-eight coil, ensuring that the spacing between adjacent magnetic fields is consistent. The weighted coil on one side of weight 30 is a rectangular coil. The length and width of each half-open figure-eight coil are equal to the length and width of the weighted coil. The weighted coil is closely spaced parallel to the wellbore coil.

[0071] like Figure 4 and Figure 5 As shown, in this invention, each weight coil has two metal contacts 37 (it should be noted that the two weight coils on both sides of each weight 30 are located in the same circuit and can be connected by wires to form a coil). The uppermost weight coil 311 is electrically connected to the energy storage unit 36 ​​through its two metal contacts 37. The weight coils of the lower weight 30 can be cross-connected with the weight coils of the upper weight 30 through their two metal contacts 37. Specifically, the middle weight coil 321 can be cross-connected with the uppermost weight coil 311 through its two metal contacts 37, and the lowermost weight coil 331 can be cross-connected with the middle weight coil 321 through its two metal contacts 37, ensuring that the induced current generated by all weight coils flows in the same direction.

[0072] like Figure 4 and Figure 5 As shown, in this invention, each well coil has two metal contacts 37. The uppermost well coil 411 is electrically connected to the power supply 415 through its two metal contacts 37. The lower well coil can be cross-connected to the upper well coil through its two metal contacts 37. Specifically, the middle well coil 412 can be cross-connected to the uppermost well coil 411 through its two metal contacts 37, and the lowermost well coil 413 can be cross-connected to the middle well coil 412 through its two metal contacts 37. When the weight 30 descends, the uppermost well coil 411 is connected to the power supply 415, causing each adjacent semi-open figure-eight coil to form an electromagnetic field in opposite directions.

[0073] like Figure 1 and Figure 2As shown, in another preferred embodiment of the present invention, the deep wellbore 41 is further provided with a plurality of horizontally arranged closed coils 414 corresponding to the wellbore coil. A group of closed coils 414 can be arranged around the wellbore coil and the weighted coil. The plurality of closed coils 414 include an uppermost closed coil corresponding to the uppermost wellbore coil 411, an intermediate closed coil corresponding to the intermediate wellbore coil 412, and a lowermost closed coil corresponding to the lowermost wellbore coil 413.

[0074] In this invention, a set of closed coils 414 includes two horizontally arranged closed figure-eight coils. The two closed figure-eight coils rotate 180° around the center point of the deep well 41 along its plane. The two closed figure-eight coils on the same horizontal plane are connected by two wires 4141 to control the offset of the weight 30 during movement. Specifically, when the uppermost weight 31, the middle weight 32, and the lowermost weight 33 shift back and forth along the horizontal plane, the half of the closed figure-eight coil near the uppermost weight coil 311, the middle weight coil 321, and the lowermost weight coil 331 generates a large repulsive force, causing the uppermost weight 31, the middle weight 32, and the lowermost weight 33 to move closer to the horizontal midpoint, so that the uppermost weight 31, the middle weight 32, and the lowermost weight 33 do not shift during movement.

[0075] In this embodiment, the closed figure-eight coil can be formed by overlapping a large number of wires. The closed figure-eight coil has the same shape as the open figure-eight coil, but the coil of the closed figure-eight coil is completely closed. Several closed figure-eight coils are located parallel to each other on the outer side of the open figure-eight coil, preferably on the outer side of the middle of the open figure-eight coil.

[0076] In this embodiment, only three heavy blocks are shown: a top heavy block 31, a middle heavy block 32, and a bottom heavy block 33. In actual operation, only the top heavy block 31 and the bottom heavy block 33 can be used, or a top heavy block 31, n (n≥1) middle heavy blocks 32, and a bottom heavy block 33 can be used.

[0077] In this embodiment, only three well coils are shown in the row of well coils: the top well coil 411, the middle well coil 412, and the bottom well coil 413. In actual operation, only the top well coil 411 and the bottom well coil 413 can be used, or a top well coil 411, n (n≥1) middle well coils 412, and a bottom well coil 413 can be used.

[0078] In this embodiment, only three closed coils 414 are shown. In actual operation, the number should be consistent with the number of wellbore coils.

[0079] In this embodiment, the magnetic levitation motor 10 includes a housing, a rotatable rotor 12 that axially passes through the center of the housing and extends outward from the housing and has an output shaft, and a stator assembly 13 that is fixed to the housing and arranged around the outer periphery of the rotor 12. A radially outwardly extending disk 121 is fixed to the rotor 12, and an annular permanent magnet 122 that cooperates with the stator assembly 13 is fixed to the disk 121. The current generated by the stator assembly 13 can drive the annular permanent magnet 122 to rotate around the axis of the rotor 12, thereby causing the rotor 12 to rotate. There are multiple stator assemblies 13, which are evenly distributed circumferentially around the outer periphery of the rotor 12. The annular permanent magnets 122 are arranged in a one-to-one correspondence with the stator assemblies 13. Preferably, the annular permanent magnets 122 are symmetrically arranged at both ends of the disk 121, and correspondingly, stator assemblies 13 corresponding to the annular permanent magnets 122 are symmetrically arranged on both the left and right sides of the disk 121.

[0080] The outer casing includes a cylindrical shell 111 and two circular outer casing covers 112 located at both ends of the cylindrical shell 111. The circular outer casing covers 112 have through holes 113 on their edges, through which locking bolts 114 are threadedly connected to the cylindrical shell 111. The two circular outer casing covers 112 have a central opening for mounting a rotor 12. The two motors 10 share a single rotor 12, which serves as the motor's output shaft 101. The stator assembly 13 includes a stator 131, silicon steel sheets 132, stator coils 133, and an armature 134. The stator 131, silicon steel sheets 132, stator coils 133, and armature 134 are sequentially fixed to the inner side of the circular outer casing covers 112.

[0081] In this invention, the outer ring of the rotor 12's disk 121 is provided with a radially outwardly protruding convex permanent magnet 141 fixedly connected to it. The inner wall of the cylindrical shell 111 is fixedly provided with a radially inwardly recessed concave permanent magnet 142 that cooperates with the convex permanent magnet 141. The concave permanent magnet 142 is arranged around the convex permanent magnet 141 and coaxial with it. There is a gap between the concave permanent magnet 142 and the convex permanent magnet 141, and their magnetic properties are opposite. The aforementioned convex and concave surfaces include, but are not limited to, spherical, ellipsoidal, or aspherical surfaces (such as polygonal prism surfaces, specifically composed of the top surface and four sides of a regular square frustum), as long as they can simultaneously apply axial and radial magnetic forces to the rotor 12, causing the rotor 12 to be suspended in its axial and radial directions. In this embodiment, it is preferred that both the convex and concave surfaces are spherical surfaces.

[0082] In this invention, the rotor 12 is provided with a first cylindrical permanent magnet 143 fixedly connected to the outer ring, and a second cylindrical permanent magnet 144, which is arranged around the first cylindrical permanent magnet 143 and coaxial with it, is fixedly connected to the inner side of the circular outer shell cover 112. There is a gap between the first cylindrical permanent magnet 143 and the second cylindrical permanent magnet 144 and their magnetic properties are opposite, so as to increase the magnetic force of the rotor 12 in its radial direction and make the rotor 12 more stable in the radial direction.

[0083] After the two magnetic levitation motors 10 are energized, the current will generate a moving magnetic field to drive the annular permanent magnet 122 to rotate. The rotation of the annular permanent magnet 122 will drive the rotor 12 to rotate. Moreover, under the action of the concave permanent magnet 142 and the convex permanent magnet 141, as well as the action of the first cylindrical permanent magnet 143 and the second cylindrical permanent magnet 144, the rotor 12 is in a suspended state, which can reduce the energy loss and noise pollution caused by friction of the rotor 12.

[0084] It should be noted that the gravity energy storage system based on electromagnetic technology in Embodiment 2 can be applied to Embodiment 1, and can also be used in other gravity energy storage systems. Specifically, the structure of the magnetic levitation motor 10 in Embodiment 2 can be applied to Embodiment 1; the structure of the weight 30 with a weight coil in Embodiment 2 can be applied to Embodiment 1, or the structure of the weight 30 in Embodiment 1 can be applied to Embodiment 2, that is, the structures of the weight 30 in Embodiment 1 and Embodiment 2 can be combined; the method of dispersing several weights 30 by setting multiple shallow wells 42 in Embodiment 1 can be applied to Embodiment 2; the structure and principle of setting a weight coil on the weight 30, and the weight 30 moving downward to cut the well coil in the deep well 41 to generate an induced current and store it in the energy storage unit 36 ​​in Embodiment 2 can be applied to Embodiment 1. However, it should be noted that since the connection method between the steel rope 20 and the weight 30 in Embodiment 2 is different from that in Embodiment 1, those skilled in the art should modify the connection method between the steel rope 20 and the weight 30 according to the specific circumstances of Embodiment 1 and Embodiment 2. This is prior art and will not be described in detail here.

[0085] In the description of this specification, references to terms such as "preferred embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gravitational energy storage system based on electromagnetic technology, characterized in that, The application relates to a vertical stackable heavy block, a deep shaft for vertical movement of the heavy block, and a motor outside the wellhead of the deep shaft, wherein an output shaft of the motor is wound with a steel rope, and the heavy block can be overlapped on the steel rope. When the heavy block moves from top to bottom, the output shaft of the motor is rotated to generate electricity. The heavy block is externally or internally provided with a heavy block coil, and the heavy block coil is directly or indirectly connected with an electricity storage unit. The deep shaft is internally provided with a plurality of vertically arranged shaft coils, and the heavy block coil can vertically move relative to the shaft coil to cut the shaft coil to generate induced current and store the induced current in the electricity storage unit. Two heavy block coils in the same loop are symmetrically arranged on two side walls of each heavy block, all the heavy block coils of the heavy blocks can be vertically arranged in two rows and in the same loop, and two rows of the shaft coils are symmetrically arranged on two sides of the deep shaft; the shaft coil is an open "8" coil arranged vertically, and the heavy block coil is arranged in parallel with the open "8" coil.

2. A gravitational energy storage system based on electromagnetic technology according to claim 1, characterized in that, Each heavy block coil has two metal contacts, the heavy block coil of the uppermost heavy block is electrically connected with the electricity storage unit through the two metal contacts, and the heavy block coil of the lower heavy block can be cross-connected with the heavy block coil of the upper heavy block through the two metal contacts. Each shaft coil has two metal contacts, the uppermost shaft coil is electrically connected with a power supply through the two metal contacts, and the lower shaft coil can be cross-connected with the upper shaft coil through the two metal contacts.

3. A gravitational energy storage system based on electromagnetic technology according to claim 1, characterized in that, The open "8" coil is a rectangular coil, and the open "8" coil is divided into upper and lower parts by a vertical line in the vertical side, and the upper part is turned over by 180 DEG to form two half open "8" coils with equal areas. The heavy block coil on one side of the heavy block is a vertically arranged rectangular coil, and the length and width of each half open "8" coil are equal to the length and width of the heavy block coil.

4. A gravitational energy storage system based on electromagnetic technology according to claim 3, characterized in that, The interval between the adjacent open "8" coils is consistent with the interval between each half open "8" coil.

5. A gravitational energy storage system based on electromagnetic technology according to any of claims 1-4, characterized in that, The deep shaft is internally provided with a plurality of groups of closed coils corresponding to the shaft coils and arranged transversely, and a group of the closed coils can be annularly arranged outside the shaft coil and the heavy block coil.

6. A gravitational energy storage system based on electromagnetic technology according to claim 5, characterized in that, A group of the closed coils comprises two closed "8" coils arranged transversely, and the two closed "8" coils are rotated by 180 DEG along a plane where the two closed "8" coils are located with the center point of the deep shaft as the rotation center, and the two closed "8" coils on the same horizontal plane are connected through two wires.

7. A gravitational energy storage system based on electromagnetic technology according to any of claims 1-4, characterized in that, The top of the heavy block has a non-circular protruding stud outwardly protruding, and the bottom of the heavy block has a concave hole inwardly protruding and capable of matching the protruding stud. The lower end of the steel rope is fixedly connected with a limiting block, and the top of the limiting block can match the concave hole of the lowermost heavy block.

8. A gravitational energy storage system based on electromagnetic technology according to any of claims 1-4, characterized in that, The motor is a magnetic suspension motor, and the motor can be used as a magnetic suspension motor to drive electricity consumption or as a magnetic suspension generator to generate electricity driven by the heavy block. The number of the motors is two, the two motors are radially and symmetrically distributed on two sides of the deep shaft, and the output shafts of the two motors are coaxially fixed.

9. A gravitational energy storage system based on electromagnetic technology according to claim 8, characterized in that, The magnetic suspension motor comprises a housing, a rotatable rotor with an output shaft axially passing through the center of the housing and extending out of the housing, and a stator assembly fixed to the housing and arranged around the outer periphery of the rotor, the rotor is fixed with a disc extending radially outward, the disc is fixed with an annular permanent magnet matched with the stator assembly, and the current generated by the stator assembly can drive the annular permanent magnet to rotate around the axis of the rotor to rotate the rotor; The magnetic suspension motor further comprises at least one of the following structures: Structure one: an outwardly convex surface-shaped permanent magnet is arranged around the disc and fixed thereto, a recessed surface-shaped permanent magnet matched with the convex surface-shaped permanent magnet is fixed in the housing and recessed radially inward, the recessed surface-shaped permanent magnet is arranged around the convex surface-shaped permanent magnet and coaxial with the convex surface-shaped permanent magnet, and the recessed surface-shaped permanent magnet and the convex surface-shaped permanent magnet have a gap therebetween and their magnetic properties are opposite; Structure two: a first cylindrical permanent magnet is arranged around the rotor and fixed thereto, a second cylindrical permanent magnet is fixed in the housing and arranged around the first cylindrical permanent magnet and coaxial with the first cylindrical permanent magnet, the first cylindrical permanent magnet and the second cylindrical permanent magnet have a gap therebetween and their magnetic properties are opposite.

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