A gravity energy storage system based on mechanically coupled flywheel

Abstract

The present invention relates to the technical field of power grid energy storage, and discloses a gravity energy storage system based on a mechanically coupled flywheel, including a support frame, a mounting plate fixedly installed on the top of the support frame, a mounting frame fixedly installed on one side of the top of the mounting plate, a turntable rotatably installed on the top of the mounting plate, a pull rope wound and connected to the turntable, and a counterweight block fixedly installed; a shell fixedly installed on one side of the mounting frame, a magnetic suspension bracket fixedly installed inside the shell, a flywheel suspended inside the magnetic suspension bracket, a transmission shaft movably connected through the middle of the flywheel, and a linkage mechanism is provided at the bottom of the transmission shaft. The present invention achieves complete separation from the outside world during the energy storage process through the mutual cooperation of a first clutch, a second clutch, a transmission shaft and a side pressure plate, and only relies on the magnetic suspension bracket for support, thereby reducing friction loss during the flywheel energy storage process.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grid energy storage, and in particular, relates to a gravity energy storage system based on a mechanically coupled flywheel. Background Art

[0002] With the vigorous development of renewable energy power generation, the field of power energy storage is also accelerating the pace of technological updates. Among them, gravity energy storage and flywheel energy storage have received widespread attention in recent years. Mechanical energy storage is divided into power-type mechanical energy storage and energy-type mechanical energy storage. Generally speaking, gravity energy storage is energy-type mechanical energy storage, which aims to reduce the volatility and randomness of large-scale wind power and photovoltaic power generation. It can be used for peak load regulation of power grids and can also be used for time transfer of electric energy; flywheel energy storage is mostly used as power-type mechanical energy storage due to its fast response speed.

[0003] However, due to various reasons such as power intermittence and power fluctuation caused by the heavy object replacement process of the gravity energy storage system, power-type energy storage forms such as flywheel energy storage and supercapacitors need to be added to the operation of the gravity energy storage system to smooth and back up power; in addition, due to the extensive application of power electronics technology, it is difficult to meet the inertia requirements in the power system. In recent years, large-inertia synchronous phase-converters based on coupled flywheels have also been applied to a certain extent.

[0004] The Chinese patent with the authorization announcement number CN117097068B discloses a gravity energy storage system based on a mechanically coupled flywheel, which has the following advantages: 1. It can be applied to gravity energy storage technical solutions under almost all existing technical routes, and the gravity energy storage function is improved and expanded; 2. The principle is relatively simple and can be used in the existing gravity energy storage system through modification. Through the mechanical coupling flywheel, the rapid frequency regulation function can be added on the basis of the existing peak regulation function; 3. The structure is relatively simple. Through system optimization, the loss can be small, but the inertia support effect can be improved significantly; 4. The provided solution has low requirements for construction site selection, high stability, long service life, and does not cause pollution to the environment; 5. The provided solution utilizes existing equipment. On the one hand, it can increase the inertia of the gravity energy storage system, and smooth the power fluctuation of the gravity energy storage system to improve stability; on the other hand, it can also provide inertia for the power system when the motor is running as a synchronous phase regulator.

[0005] However, this technical solution still has at least the following defects: in this solution, the flywheel is connected to the motor through a coupling, and the motor is arranged outside the flywheel protective cover. To ensure the sealing, the output shaft of the motor must be in close contact with the flywheel protective cover. During this process, the rotation of the flywheel will produce certain losses. In view of this, the present invention is proposed. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a gravity energy storage system based on a mechanically coupled flywheel. Through the mutual cooperation of a first clutch, a second clutch, a transmission shaft and a side pressure plate, the flywheel is completely separated from the outside world during the energy storage process and is only supported by a magnetic levitation bracket, thereby reducing friction losses during the flywheel energy storage process.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A gravity energy storage system based on a mechanically coupled flywheel comprises a support frame, a mounting plate is fixedly mounted on the top of the support frame, a mounting frame is fixedly mounted on one side of the top of the mounting plate, a turntable is rotatably mounted on the top of the mounting plate, a pull rope is wound around the turntable, a pull rope is wound around one end of the pull rope, and a counterweight is fixedly mounted thereon;

[0009] A shell is fixedly installed on one side of the mounting frame, the top of the pulley is fixedly installed on the bottom of the shell, a magnetic suspension bracket is fixedly installed inside the shell, a flywheel is suspended inside the magnetic suspension bracket, a transmission shaft is movably connected through the middle of the flywheel, a linkage mechanism is provided at the bottom of the transmission shaft, the linkage mechanism is used to drive the turntable and the transmission shaft, a second clutch is installed between the transmission shaft and the linkage mechanism, a motor is fixedly installed on the top inner wall of the shell, and a first clutch is installed between the motor and the transmission shaft.

[0010] As a preferred embodiment of the present invention, a first support plate is fixedly installed on the bottom of the first clutch, a first oil cylinder is fixedly installed on the top of the first support plate, and the first oil cylinder is fixedly installed on the outside of the outer shell, a second support plate is fixedly installed on the top of the second clutch, a second oil cylinder is fixedly installed on the top of the second support plate, and the top of the second oil cylinder is fixedly installed on the bottom of the outer shell.

[0011] As a preferred embodiment of the present invention, a movable shaft is movably inserted inside the transmission shaft, and the cross-sectional shape of the movable shaft is a rounded square. A side pressure plate is arranged on the side of the transmission shaft located inside the flywheel, and the side pressure plate is adapted to the inside of the flywheel and are both made of frosted material. A top plate is rotatably connected to one side of the side pressure plate, and one end of the top plate passes through the transmission shaft and is rotatably connected to one side of the movable shaft. A movable groove is provided on the side of the transmission shaft, and a movable ring is movably sleeved on the transmission shaft, and a protrusion is fixedly installed on the inner wall of the movable ring, and the protrusion is fixedly connected to the movable shaft through the movable groove, and an outer ring is rotatably sleeved on the outer side of the movable ring, and a movable block is fixedly installed on one side of the outer ring, and a connecting rod is fixedly installed on one end of the movable block, and a third oil cylinder is fixedly installed on one end of the connecting rod, and the third oil cylinder is fixedly installed on the bottom of the outer shell.

[0012] As a preferred embodiment of the present invention, the linkage mechanism includes a support shaft, the top of the support shaft is connected to the second clutch, clutch blocks are arranged on both sides of the support shaft, the sides of the clutch block are all made of frosted material, a plug rod is fixedly installed on one side of the clutch block, the plug rod is movably inserted in the support shaft, a connecting block is fixedly installed on the side of the clutch block, a limiting groove is provided on the connecting block, an annular plate is slidably connected to the limiting groove, a boss is provided at the bottom of the support shaft, a connecting piece is fixedly installed at the bottom of the boss, a sleeve is movably sleeved on the outer side of the connecting piece, connecting columns are fixedly installed on both sides of the sleeve, an upper swivel ring is fixedly installed on the outer side of the connecting column, the upper swivel ring and the boss are both staggered with the bottom of the clutch block, and the inner wall of the upper swivel ring and the outer side of the boss are both made of frosted material.

[0013] As a preferred embodiment of the present invention, a first bevel gear is fixedly installed on the bottom of the sleeve, the first bevel gear is movably sleeved on the outside of the connecting piece, the connecting piece is cross-shaped, and second bevel gears are rotatably sleeved on both ends of the connecting piece, the second bevel gear is meshed with the first bevel gear, lower swivel rings are fixedly installed on both ends of the connecting piece, and a third bevel gear is fixedly installed on the top of the turntable, and the third bevel gear is meshed with the two second bevel gears.

[0014] As a preferred embodiment of the present invention, fixed seats are fixedly installed on both sides of the top of the mounting plate, and a limiting ring is fixedly installed between the two fixed seats. The upper swivel ring and the lower swivel ring are rotatably connected in the limiting ring. Two sets of plug-in shafts are movably plugged into the side of each of the fixed seats, and a brake plate is fixedly installed at one end of the plug-in shaft. The brake plate is adapted to the upper swivel ring and the lower swivel ring, and the side of the brake plate is made of frosted material.

[0015] As a preferred embodiment of the present invention, each group of the plug shafts includes two, which movably penetrate the fixed seat and extend to the outside, and slides are slidably connected to both sides of the fixed seat, and a pressure block is fixedly installed on one end of the slide, and one side of the pressure block is inclined, and the inclined surface of the pressure block is adapted to the plug shaft, and a connecting plate is fixedly installed on one side of the pressure block, and a fourth oil cylinder is fixedly installed on the bottom of the connecting plate, and the fourth oil cylinder is fixedly installed on one side of the fixed seat, and the top of the connecting plate is rotatably connected to a pull plate, and the top of the pull plate is rotatably connected to a seesaw, and both sides of the seesaw are rotatably connected to support platforms, and the bottom of the support platform is fixedly installed on the top of the fixed seat, and a limit frame is fixedly installed on one end of the seesaw, and fixed plates are fixedly installed on both sides of the annular plate, and baffles are fixedly installed on both sides of the fixed plate, and the baffles are movably inserted in the limit frame.

[0016] As a preferred embodiment of the present invention, a metal guide rail is fixedly installed on one side of the support frame, the metal guide rail is adapted to the counterweight block, an electromagnet is installed on the side of the counterweight block, a power transmission line is installed on one side of the metal guide rail, the power transmission line is used to supply power to the electromagnet, a base is fixedly installed on the bottom of the support frame, a buffer pad is fixedly installed on the top of the base, and a laser radar is installed on the top of the base.

[0017] As a preferred embodiment of the present invention, a landing control system is included, wherein the landing control system is used to control the counterweight block to buffer and decelerate to zero speed when the counterweight block lands to perform power peak regulation. The landing control system includes:

[0018] A distance monitoring unit, a speed monitoring unit and a determination unit, wherein the distance monitoring unit is used to monitor the position of the counterweight block during its descent along the metal guide rail and determine whether to start the electromagnet to provide electromagnetic force to assist the counterweight block in decelerating. The speed monitoring unit is used to detect the speed of the counterweight block during its descent and determine whether to start the electromagnet. The determination unit is used to start the electromagnet and adjust the electromagnetic force of the electromagnet to assist the counterweight block in decelerating when it descends along the metal guide rail to the bottom of the metal guide rail.

[0019] As a preferred embodiment of the present invention, a position judgment strategy is configured in the distance monitoring unit, and the position judgment strategy includes a critical threshold and an approach threshold. The critical threshold represents the position where the counterweight reaches the buffering deceleration position, and the approach threshold represents the position where the counterweight reaches the electromagnet and starts to return to zero deceleration. The distance of the counterweight along the height direction is monitored by a laser radar, and it is identified whether the weight passes the critical threshold and the approach threshold. When the counterweight passes the critical threshold, it also includes judging the speed of the counterweight to control the start or shut down of the electromagnet. When the counterweight reaches the approach threshold, the electromagnet is controlled to provide buffering magnetic force to assist the counterweight to decelerate to zero when it moves along the metal guide rail to the bottom.

[0020] As a preferred embodiment of the present invention, a process strategy is configured in the speed monitoring unit, and the process strategy includes configuring a speed threshold, and obtaining the real-time speed of the counterweight block when the counterweight block moves to a critical threshold, and judging whether the real-time speed is greater than or equal to the speed threshold. If the real-time speed is greater than or equal to the speed threshold, a start signal is generated, and the electromagnet is controlled to work based on the start signal and an electromagnetic force is provided to assist the counterweight block in buffering and deceleration. If the real-time speed is less than the speed threshold, a standby signal is generated, and the electromagnet is controlled to be in a standby state based on the standby signal.

[0021] As a preferred embodiment of the present invention, a magnetic force adjustment strategy is configured in the determination unit, and the magnetic force adjustment strategy includes obtaining the real-time speed when identifying the start signal or the standby signal, and predicting the change in the speed of the counterweight block along the metal guide rail from the critical threshold to the approach threshold, so as to predict the approach speed when the counterweight block reaches the approach threshold position, and generating an adjustment curve for electromagnetic force adjustment of the electromagnet based on the approach speed, and regulating the electromagnetic force of the electromagnet based on the adjustment curve so that the counterweight block decelerates to zero speed when it moves to the bottom of the metal guide rail.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention achieves complete separation from the outside world during the energy storage process by means of the mutual cooperation of the first clutch, the second clutch, the transmission shaft and the side pressure plate, and only relies on the magnetic suspension bracket for support, thereby reducing the friction loss during the energy storage process of the flywheel.

[0024] The present invention sets a linkage mechanism to make the motors of gravity energy storage and flywheel energy storage rotate in the same direction during the energy release process, so as to achieve the same current direction without the need to transform the current.

[0025] The invention provides an electromagnet and a metal guide rail so that the counterweight block can be decelerated when descending, thereby improving the stability of the landing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a gravity energy storage system based on a mechanically coupled flywheel according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the metal guide rail of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the laser radar of the present invention;

[0029] Figure 4 This is a structural schematic diagram of the counterweight block of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the housing of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the housing of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the first clutch of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the second clutch of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of the side pressure plate of the present invention;

[0035] Fig.10 It is a structural schematic diagram of the movable shaft of the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the movable shaft and the transmission shaft in the separated state of the present invention;

[0037] Fig.12 This is a schematic diagram of the top structure of the mounting plate of the present invention;

[0038] Fig.13 It is a structural schematic diagram of the turntable of the present invention;

[0039] Fig.14 This is a schematic diagram of the structure of the annular plate of the present invention;

[0040] Fig.15 This is a schematic structural diagram of the first bevel gear of the present invention;

[0041] Fig.16 This is a flow chart of the landing control system of the present invention;

[0042] Fig.17 This is a flow chart of the distance monitoring unit system of the present invention;

[0043] Fig.18 This is a flow chart of the speed monitoring unit system of the present invention;

[0044] Fig.19 It is a flow chart of the determination unit system of the present invention.

[0045] In the figure:

[0046] 100, base; 101, support frame; 102, metal guide rail; 103, counterweight; 104, electromagnet; 105, transmission line; 106, buffer pad; 107, laser radar;

[0047] 200, mounting plate; 201, mounting frame; 202, housing; 203, magnetic suspension bracket; 204, flywheel;

[0048] 300, motor; 301, first clutch; 302, first support plate; 303, first oil cylinder; 304, transmission shaft; 305, second clutch; 306, second support plate; 307, second oil cylinder; 308, side pressure plate; 309, top plate; 310, movable shaft; 311, movable ring; 312, movable groove; 313, outer ring; 314, movable block; 315, connecting rod; 316, third oil cylinder; 317, protrusion;

[0049] 400, support shaft; 401, clutch block; 402, plug rod; 403, connection block; 404, limit groove; 405, annular plate; 406, fixed plate;

[0050] 500, fixed seat; 501, limiting ring; 502, upper swivel; 503, connecting column; 504, sleeve; 505, first bevel gear; 506, connecting piece; 507, second bevel gear; 508, lower swivel; 509, protruding column;

[0051] 600, plug shaft; 601, brake plate; 602, pressure block; 603, slide plate; 604, connecting plate; 605, fourth oil cylinder; 606, pull plate; 607, seesaw; 608, limit frame; 609, stop rod; 610, support platform; 700, third bevel gear; 701, turntable; 702, pulley; 703, pull rope. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0053] Embodiment 1:

[0054] like Figures 1 to 19 As shown, a gravity energy storage system based on a mechanically coupled flywheel includes a support frame 101, a mounting plate 200 is fixedly mounted on the top of the support frame 101, a mounting frame 201 is fixedly mounted on one side of the top of the mounting plate 200, a turntable 701 is rotatably mounted on the top of the mounting plate 200, a pull rope 703 is wound around the turntable 701, a pulley 702 is wound around one end of the pull rope 703, and a counterweight 103 is fixedly mounted;

[0055] A shell 202 is fixedly installed on one side of the mounting frame 201, the top of the pulley 702 is fixedly installed on the bottom of the shell 202, a magnetic suspension bracket 203 is fixedly installed inside the shell 202, a flywheel 204 is suspended inside the magnetic suspension bracket 203, a transmission shaft 304 is movably connected through the middle of the flywheel 204, a linkage mechanism is arranged at the bottom of the transmission shaft 304, the linkage mechanism is used to drive the turntable 701 and the transmission shaft 304, a second clutch 305 is installed between the transmission shaft 304 and the linkage mechanism, a motor 300 is fixedly installed on the top inner wall of the shell 202, a first clutch 301 is installed between the motor 300 and the transmission shaft 304, and in the present invention, the shell 202 can be connected to a vacuum pump to maintain the vacuum state in the shell 202 and reduce air resistance.

[0056] like Figure 6-Figure 8As shown, in a specific embodiment, a first support plate 302 is fixedly mounted on the bottom of the first clutch 301, a first oil cylinder 303 is fixedly mounted on the top of the first support plate 302, and the first oil cylinder 303 is fixedly mounted on the outside of the housing 202, a second support plate 306 is fixedly mounted on the top of the second clutch 305, a second oil cylinder 307 is fixedly mounted on the top of the second support plate 306, and the top of the second oil cylinder 307 is fixedly mounted on the bottom of the housing 202. In this configuration, the first oil cylinder 303 is used to control the first clutch 301, and the second oil cylinder 307 is used to control the second clutch 305.

[0057] like Figure 9-11 As shown, further, a movable shaft 310 is movably inserted inside the transmission shaft 304, and the cross-sectional shape of the movable shaft 310 is a rounded square. A side pressure plate 308 is provided on the side of the transmission shaft 304 located inside the flywheel 204. The side pressure plate 308 is adapted to the inside of the flywheel 204 and is made of frosted material. A top plate 309 is rotatably connected to one side of the side pressure plate 308. One end of the top plate 309 passes through the transmission shaft 304 and is rotatably connected to one side of the movable shaft 310. A movable groove 312 is provided on the side of the transmission shaft 304. , a movable ring 311 is movably sleeved on the transmission shaft 304, a protrusion 317 is fixedly installed on the inner wall of the movable ring 311, and the protrusion 317 is fixedly connected to the movable shaft 310 through the movable groove 312, and an outer ring 313 is rotatably sleeved on the outer side of the movable ring 311, and a movable block 314 is fixedly installed on one side of the outer ring 313, and a connecting rod 315 is fixedly installed on one end of the movable block 314, and a third oil cylinder 316 is fixedly installed on one end of the connecting rod 315, and the third oil cylinder 316 is fixedly installed on the bottom of the housing 202. In this configuration, the third oil cylinder 316 drives the movable block 314 and the outer ring 313 to descend through the connecting rod 315, and the outer ring 313 drives the movable ring 311 to descend, and the movable ring 311 drives the movable shaft 310 to descend through the protrusion 317, and pulls the side pressure plate 308 through the top plate 309, so that the side pressure plate 308 is separated from the inner wall of the flywheel 204.

[0058] Embodiment 2:

[0059] like Figure 13-Figure 15As shown, in a specific embodiment, the linkage mechanism includes a support shaft 400, the top of the support shaft 400 is connected to the second clutch 305, clutch blocks 401 are arranged on both sides of the support shaft 400, the sides of the clutch block 401 are made of frosted material, an insertion rod 402 is fixedly installed on one side of the clutch block 401, the insertion rod 402 is movably inserted in the support shaft 400, a connecting block 403 is fixedly installed on the side of the clutch block 401, a limiting groove 404 is provided on the connecting block 403, and a ring plate 405 is slidably connected to the limiting groove 404. In this setting, the annular plate 405 drives the connecting block 403 to move inward through the limiting groove 404, thereby driving the clutch block 401 to move toward the support shaft 400. At the same time, the bottom clamping boss 509 of the clutch block 401 enables the boss 509 to rotate synchronously with the support shaft 400. When the annular plate 405 drives the connecting block 403 to move outward through the limiting groove 404, the support shaft 400 and the upper rotating ring 502 rotate synchronously.

[0060] like Figure 14-15 As shown, further, a boss 509 is provided at the bottom of the support shaft 400, a connector 506 is fixedly installed at the bottom of the boss 509, a sleeve 504 is movably sleeved on the outside of the connector 506, connecting columns 503 are fixedly installed on both sides of the sleeve 504, an upper swivel 502 is fixedly installed on the outside of the connecting column 503, the upper swivel 502 and the boss 509 are both staggered with the bottom of the clutch block 401, and the inner wall of the upper swivel 502 and the outer side of the boss 509 are both made of frosted material. In this configuration, the frosted material of the inner wall of the upper swivel 502 and the boss 509 is used to increase the friction between the clutch block 401.

[0061] like Figure 14-15As shown, further, a first bevel gear 505 is fixedly installed at the bottom of the sleeve 504, and the first bevel gear 505 is movably sleeved on the outside of the connecting member 506. The connecting member 506 is cross-shaped, and second bevel gears 507 are rotatably sleeved at both ends of the connecting member 506. The second bevel gear 507 is meshed with the first bevel gear 505. A lower rotating ring 508 is fixedly installed at both ends of the connecting member 506. A third bevel gear 700 is fixedly installed on the top of the turntable 701, and the third bevel gear 700 is meshed with the two second bevel gears 507. In this arrangement, the boss 509 drives the connecting member 506 to rotate, and the connecting member 506 drives the second bevel gears 507 at both ends to revolve around the connecting member 506. At the same time, the first bevel gear 505 is kept fixed together with the upper rotating ring 502, so that the second bevel gear 507 rotates while revolving. At the same time, the second bevel gear 507 drives the third bevel gear 700 to rotate, thereby rotating the turntable 701, and the turntable 701 drives the third bevel gear 700 to rotate. The third bevel gear 700 drives the second bevel gear 507 to rotate through meshing, and the second bevel gear 507 drives the first bevel gear 505 to rotate through meshing. The first bevel gear 505 drives the upper rotating ring 502 through the sleeve 504 and the connecting column 503, thereby driving the support shaft 400 to rotate.

[0062] like Figure 12-13 As shown, further, a fixing seat 500 is fixedly installed on both sides of the top of the mounting plate 200, and a limit ring 501 is fixedly installed between the two fixing seats 500. The upper rotating ring 502 and the lower rotating ring 508 are both rotatably connected in the limit ring 501. Two sets of plug shafts 600 are movably plugged on the side of each fixing seat 500. A brake plate 601 is fixedly installed on one end of the plug shaft 600. The brake plate 601 is adapted to the upper rotating ring 502 and the lower rotating ring 508, and the side of the brake plate 601 is made of frosted material. In this setting, the upper rotating ring 502 or the lower rotating ring 508 is fixed by the mutual extrusion of the brake plate 601 and the upper rotating ring 502 or the lower rotating ring 508.

[0063] Embodiment 3:

[0064] like Fig.13As shown, in a specific embodiment, each group of plug shafts 600 includes two, which are movable through the fixed seat 500 and extend to the outside, and the two sides of the fixed seat 500 are slidably connected with a slide plate 603, and a pressure block 602 is fixedly installed at one end of the slide plate 603. One side of the pressure block 602 is inclined, and the inclined surface of the pressure block 602 is adapted to the plug shaft 600. A connecting plate 604 is fixedly installed on one side of the pressure block 602, and a fourth oil cylinder 605 is fixedly installed at the bottom of the connecting plate 604. The fourth oil cylinder 605 is fixedly installed on one side of the fixed seat 500. In this setting, the fourth oil cylinder 605 drives the pressure block 602 to rise through the connecting plate 604. The pressure block 602 presses the upper plug shaft 600 under the action of its inclined surface and releases the lower plug shaft 600, so that the upper brake plate 601 fixes the upper swivel 502, and the lower swivel 508 is in an active state.

[0065] like Fig.13 As shown, further, the top of the connecting plate 604 is rotatably connected to a pull plate 606, the top of the pull plate 606 is rotatably connected to a seesaw 607, the two sides of the seesaw 607 are rotatably connected to support platforms 610, the bottom of the support platform 610 is fixedly installed on the top of the fixed seat 500, one end of the seesaw 607 is fixedly installed with a limit frame 608, the two sides of the annular plate 405 are fixedly installed with fixed plates 406, the two sides of the fixed plate 406 are fixedly installed with blocking rods 609, and the blocking rods 609 are movably inserted in the limit frame 608. In this configuration, the pressing block 602 rises while resisting the seesaw 607 through the pull plate 606, and the other end of the seesaw 607 drives the fixed plate 406 to descend through the limit frame 608 and the blocking rod 609.

[0066] like Figure 2-Figure 4 As shown, further, a metal guide rail 102 is fixedly installed on one side of the support frame 101, the metal guide rail 102 is adapted to the counterweight 103, an electromagnet 104 is installed on the side of the counterweight 103, a power transmission line 105 is installed on one side of the metal guide rail 102, the power transmission line 105 is used to supply power to the electromagnet 104, a base 100 is fixedly installed on the bottom of the support frame 101, a buffer pad 106 is fixedly installed on the top of the base 100, and a laser radar 107 is installed on the top of the base 100. In this setting, while the counterweight block is descending, the laser radar 107 located on the base 100 monitors its speed and distance. When the counterweight block descends to the bottom, its speed is relatively fast. At this time, the laser radar 107 detects that the distance is relatively close and the speed is relatively fast, and issues a command to make the electromagnet 104 work. The electromagnet 104 and the metal guide rail 102 attract each other to obtain a greater friction force, so as to reduce the speed of the counterweight block 103 that is about to land, and the counterweight block 103 is further buffered by the buffer pad 106.

[0067] like Figure 16-Figure 19, including a landing control system, which is used to control the counterweight block 103 to buffer and decelerate to zero speed when the counterweight block 103 lands to perform power peak regulation. The landing control system includes:

[0068] The distance monitoring unit, the speed monitoring unit and the determination unit, the distance monitoring unit is used to monitor the position of the counterweight 103 during the descent along the metal guide rail 102 and determine whether to start the electromagnet 104 to provide electromagnetic force to assist the counterweight 103 in decelerating. The speed monitoring unit is used to detect the speed of the counterweight 103 during the descent and determine whether to start the electromagnet 104. The determination unit is used to start the electromagnet 104 and adjust the electromagnetic force of the electromagnet 104 when assisting the counterweight 103 in decelerating, so as to assist the counterweight 103 in decelerating to zero speed when it descends along the metal guide rail 102 to the bottom of the metal guide rail 102.

[0069] A position judgment strategy is configured in the distance monitoring unit, and the position judgment strategy includes a critical threshold and an approach threshold. The critical threshold represents the position where the counterweight block 103 reaches the start of buffering and deceleration, and the approach threshold represents the position where the counterweight block 103 reaches the start of zeroing and deceleration by the electromagnet 104. The distance of the counterweight block 103 along the height direction is monitored by the laser radar 107, and it is identified whether the counterweight block 103 passes the critical threshold and the approach threshold. When the counterweight block 103 passes the critical threshold, it also includes judging the speed of the counterweight block 103 to control the start or shutdown of the electromagnet 104. When the counterweight block 103 reaches the approach threshold, the electromagnet 104 is controlled to provide buffering magnetic force to assist the counterweight block 103 to decelerate to zero speed when it moves to the bottom along the metal guide rail 102.

[0070] The speed monitoring unit is configured with a process strategy, which includes configuring a speed threshold, obtaining the real-time speed of the counterweight 103 when the counterweight 103 moves to the critical threshold, and judging whether the real-time speed is greater than or equal to the speed threshold. If the real-time speed is greater than or equal to the speed threshold, a start signal is generated, and the electromagnet 104 is controlled to work based on the start signal and provide an electromagnetic force to assist the counterweight 103 in buffering and deceleration. If the real-time speed is less than the speed threshold, a standby signal is generated, and the electromagnet 104 is controlled to be in a standby state based on the standby signal.

[0071] The determination unit is provided with a magnetic force regulation strategy, which includes obtaining the real-time speed when identifying the start signal or the standby signal, and predicting the change in speed of the counterweight 103 along the metal guide rail 102 from the critical threshold to the approach threshold, so as to predict the approach speed when the counterweight 103 reaches the approach threshold position, and generating an adjustment curve for electromagnetic force regulation of the electromagnet 104 based on the approach speed, and regulating the electromagnetic force of the electromagnet 104 based on the adjustment curve, so that the counterweight 103 decelerates to zero speed when it moves to the bottom of the metal guide rail 102.

[0072] The implementation principle of a gravity energy storage system based on a mechanically coupled flywheel of the present embodiment is as follows: when performing gravity energy storage, instructions are issued to the first oil cylinder 303, the second oil cylinder 307 and the third oil cylinder 316, the first oil cylinder 303 drives the first clutch 301 to close through the first support plate 302, the second oil cylinder 307 drives the second clutch 305 to close through the second support plate 306, the third oil cylinder 316 drives the movable block 314 and the outer ring 313 to descend through the connecting rod 315, the outer ring 313 drives the movable ring 311 to descend, the movable ring 311 drives the movable shaft 310 to descend through the protrusion 317, and pulls the side pressure plate 308 through the top plate 309, so that the side pressure plate 308 is separated from the inner wall of the flywheel 204;

[0073] Start the fourth oil cylinder 605, which drives the pressure block 602 to rise through the connecting plate 604. The pressure block 602 presses the upper plug shaft 600 under the action of its inclined surface and releases the lower plug shaft 600, so that the upper brake plate 601 fixes the upper rotating ring 502, while the lower rotating ring 508 is in an active state. At the same time, the pressure block 602 rises and presses against the rocker plate 607 through the pull plate 606. The other end of the rocker plate 607 drives the fixing plate 406 to descend through the limit frame 608 and the stop rod 609, so that the annular plate 405 descends. The annular plate 405 drives the connecting block 403 to move inward through the limit groove 404, thereby driving the clutch block 401 to move toward the support shaft 400. At the same time, the bottom of the clutch block 401 clamps the boss 509, so that the boss 509 can keep synchronous rotation with the support shaft 400.

[0074] At this time, the motor 300 is started, and the motor 300 drives the transmission shaft 304 to rotate through the first clutch 301, and the transmission shaft 304 drives the support shaft 400 to rotate through the second clutch 305, and the support shaft 400 drives the boss 509 to rotate, and the boss 509 drives the connecting member 506 to rotate, and the connecting member 506 drives the second bevel gears 507 at both ends to revolve around the connecting member 506, and at the same time, the first bevel gear 505 and the upper rotating ring 502 are kept fixed together, so that the second bevel gear 507 rotates while revolving, and at the same time, the second bevel gear 507 drives the third bevel gear 700 to rotate, so that the rotating disk 701 rotates. At this time, the rotation direction of the rotating disk 701 is consistent with the rotation direction of the support shaft 400. When the rotating disk 701 rotates, the counterweight block 103 is pulled up through the pull rope 703, thereby realizing gravity energy storage;

[0075] When releasing the gravity energy storage, the fourth oil cylinder 605 is contracted, and the fourth oil cylinder 605 drives the pressure block 602 to descend through the connecting plate 604, so that the brake plate 601 below fixes the lower rotating ring 508, and the upper rotating ring 502 is unlocked. At the same time, the pressure block 602 causes the annular plate 405 to descend through the pull plate 606, the rocker plate 607 and other structures. At this time, the clutch block 401 expands outward and presses against the upper rotating ring 502, so that the support shaft 400 and the upper rotating ring 502 keep rotating synchronously. At this time, the motor 300 is unlocked, the counterweight block 103 descends rapidly, and the turntable 701 is driven to rotate through the pull rope 703, and the turntable 701 drives the third bevel gear 700 to rotate, and the third bevel gear 700 is driven to rotate. The second bevel gear 507 is driven to rotate through meshing, and the second bevel gear 507 drives the first bevel gear 505 to rotate through meshing. The first bevel gear 505 drives the upper rotating ring 502 through the sleeve 504 and the connecting column 503, thereby driving the support shaft 400 to rotate. At this time, the rotation direction of the turntable 701 is opposite to that of the first bevel gear 505, so that the rotation direction of the turntable 701 and the support shaft 400 is opposite. Since the rotation directions of the turntable 701 when winding up and lowering the pull rope 703 are different, the rotation direction of the support shaft 400 in the two processes is the same. The support shaft 400 drives the motor 300 to rotate through the transmission shaft 304. At this time, the motor 300 acts as a generator to generate electricity, thereby realizing peak regulation of the power grid;

[0076] When it is necessary to convert the gravity energy storage into flywheel energy storage for release, before releasing the counterweight 103, the first clutch 301 is opened by the first oil cylinder 303, and at the same time, the third oil cylinder 316 works in the opposite direction to make the movable shaft 310 rise, and the movable shaft 310 is pressed against the side pressure plate 308 through the top plate 309. At this time, the flywheel 204 rotates synchronously with the transmission shaft 304, and at the same time, the transmission shaft 304 is separated from the motor 300, releasing the counterweight 103 and driving the turntable 701 to rotate. The turntable 701 drives the support shaft 400 to rotate through the linkage mechanism, and the support shaft 400 drives the flywheel 204 to rotate through the second clutch 305 and the transmission shaft 304. When the counterweight 103 is about to drop to the bottom, the third oil cylinder 316 separates the side pressure plate 308 from the flywheel 204, thereby making the flywheel 204 The flywheel 204 is supported to rotate only under the action of the magnetic suspension bracket 203, so as to reduce the loss. At this time, the direction of the flywheel 204 is consistent with the direction of the support shaft 400 when the gravity energy storage is released. When the flywheel energy storage is released, the second clutch 305 is opened by the second oil cylinder 307, and the transmission shaft 304 is kept in synchronous rotation with the flywheel 204 by the third oil cylinder 316. The first clutch 301 is driven to close by the first oil cylinder 303, and the second clutch 305 is driven to open by the second oil cylinder 307. At this time, the flywheel 204 rotates and drives the transmission shaft 304 to rotate. The transmission shaft 304 drives the motor 300 to rotate through the first clutch 301, thereby realizing the frequency modulation of the power grid. In the process of peak modulation and frequency modulation, the rotation direction of the motor 300 is consistent, so that the output current direction is consistent;

[0077] While the counterweight block is descending, the laser radar 107 located on the base 100 monitors its speed and distance. When the counterweight block descends to the bottom, its speed is relatively fast. At this time, the laser radar 107 detects that the distance is relatively close and the speed is relatively fast, and issues a command to make the electromagnet 104 work. The electromagnet 104 and the metal guide rail 102 attract each other to obtain a greater friction force, so as to reduce the speed of the counterweight block 103 about to land, and the counterweight block 103 is further buffered by the buffer pad 106.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gravity energy storage system based on a mechanically coupled flywheel, comprising a support frame (101), a mounting plate (200) being fixedly mounted on the top of the support frame (101), and a mounting frame (201) being fixedly mounted on one side of the top of the mounting plate (200), characterized in that: A rotating disk (701) is rotatably mounted on the top of the mounting plate (200), a pull rope (703) is wound around the rotating disk (701), one end of the pull rope (703) is wound around a pulley (702), and a counterweight (103) is fixedly mounted thereon; A housing (202) is fixedly mounted on one side of the mounting frame (201); the top of the pulley (702) is fixedly mounted on the bottom of the housing (202); a magnetic suspension bracket (203) is fixedly mounted inside the housing (202); a flywheel (204) is suspended and mounted inside the magnetic suspension bracket (203); a transmission shaft (304) is movably connected and penetrated through the middle of the flywheel (204); a linkage mechanism is provided at the bottom of the transmission shaft (304); the linkage mechanism is used to drive the rotating disk (701) and the transmission shaft (304); a second clutch (305) is installed between the transmission shaft (304) and the linkage mechanism; a motor (300) is fixedly mounted on the inner wall of the top of the housing (202); and a first clutch (301) is installed between the motor (300) and the transmission shaft (304); A movable shaft (310) is movably inserted inside the transmission shaft (304), and the cross-sectional shape of the movable shaft (310) is a rounded square. A side pressure plate (308) is provided on the side of the transmission shaft (304) located inside the flywheel (204). The side pressure plate (308) is adapted to the inside of the flywheel (204) and is made of frosted material. A top plate (309) is rotatably connected to one side of the side pressure plate (308). One end of the top plate (309) passes through the transmission shaft (304) and is rotatably connected to one side of the movable shaft (310). A movable groove (312) is provided on the side of the transmission shaft (304). A movable ring (311) is movably sleeved on the movable ring (304), a protrusion (317) is fixedly installed on the inner wall of the movable ring (311), and the protrusion (317) is fixedly connected to the movable shaft (310) through a movable groove (312); an outer ring (313) is rotatably sleeved on the outer side of the movable ring (311), a movable block (314) is fixedly installed on one side of the outer ring (313), a connecting rod (315) is fixedly installed on one end of the movable block (314), and a third oil cylinder (316) is fixedly installed on one end of the connecting rod (315), and the third oil cylinder (316) is fixedly installed on the bottom of the housing (202).

2. A gravity energy storage system based on a mechanically coupled flywheel according to claim 1, characterized in that: A first support plate (302) is fixedly mounted on the bottom of the first clutch (301), a first oil cylinder (303) is fixedly mounted on the top of the first support plate (302), and the first oil cylinder (303) is fixedly mounted on the outside of the housing (202); a second support plate (306) is fixedly mounted on the top of the second clutch (305), a second oil cylinder (307) is fixedly mounted on the top of the second support plate (306), and the top of the second oil cylinder (307) is fixedly mounted on the bottom of the housing (202).

3. A gravity energy storage system based on a mechanically coupled flywheel according to claim 1, characterized in that: The linkage mechanism comprises a support shaft (400), the top of the support shaft (400) is connected to the second clutch (305), clutch blocks (401) are arranged on both sides of the support shaft (400), the sides of the clutch blocks (401) are both made of frosted material, an insertion rod (402) is fixedly installed on one side of the clutch block (401), the insertion rod (402) is movably inserted in the support shaft (400), a connecting block (403) is fixedly installed on the side of the clutch block (401), a limiting groove (404) is provided on the upper side of the connecting block (403), and a sliding connection is arranged on the limiting groove (404). A ring plate (405) is connected, a boss (509) is provided at the bottom of the support shaft (400), a connecting piece (506) is fixedly installed at the bottom of the boss (509), a sleeve (504) is movably sleeved on the outer side of the connecting piece (506), connecting columns (503) are fixedly installed on both sides of the sleeve (504), an upper rotating ring (502) is fixedly installed on the outer side of the connecting column (503), the upper rotating ring (502) and the boss (509) are both staggered with the bottom of the clutch block (401), and the inner wall of the upper rotating ring (502) and the outer side of the boss (509) are both made of frosted material.

4. A gravity energy storage system based on a mechanically coupled flywheel according to claim 3, characterized in that: A first bevel gear (505) is fixedly mounted on the bottom of the sleeve (504), the first bevel gear (505) is movably sleeved on the outside of a connecting piece (506), the connecting piece (506) is cross-shaped, and second bevel gears (507) are rotatably sleeved on both ends of the connecting piece (506), the second bevel gear (507) and the first bevel gear (505) are meshed with each other, lower rotating rings (508) are fixedly mounted on both ends of the connecting piece (506), and a third bevel gear (700) is fixedly mounted on the top of the rotating disk (701), the third bevel gear (700) and the two second bevel gears (507) are meshed with each other.

5. A gravity energy storage system based on a mechanically coupled flywheel according to claim 4, characterized in that: Fixed seats (500) are fixedly installed on both sides of the top of the mounting plate (200), a limit ring (501) is fixedly installed between the two fixed seats (500), the upper rotating ring (502) and the lower rotating ring (508) are both rotatably connected in the limit ring (501), and two groups of plug shafts (600) are movably plugged into the side of each fixed seat (500), and a brake plate (601) is fixedly installed at one end of the plug shaft (600), and the brake plate (601) is adapted to the upper rotating ring (502) and the lower rotating ring (508), and the side of the brake plate (601) is made of frosted material.

6. A gravity energy storage system based on a mechanically coupled flywheel according to claim 5, characterized in that: Each group of the plug shafts (600) comprises two, which are movable through the fixed seat (500) and extend to the outside. The two sides of the fixed seat (500) are slidably connected with slide plates (603). A pressure block (602) is fixedly installed on one end of the slide plate (603). One side of the pressure block (602) is inclined. The inclined surface of the pressure block (602) is adapted to the plug shaft (600). A connecting plate (604) is fixedly installed on one side of the pressure block (602). A fourth oil cylinder (605) is fixedly installed on the bottom of the connecting plate (604). The fourth oil cylinder (605) is fixedly installed on one side of the fixed seat (500). The top of the connecting plate (604) is rotatably connected to a pulling plate (606), the top of the pulling plate (606) is rotatably connected to a seesaw (607), both sides of the seesaw (607) are rotatably connected to support platforms (610), the bottom of the support platform (610) is fixedly mounted on the top of the fixing seat (500), one end of the seesaw (607) is fixedly mounted with a limit frame (608), both sides of the annular plate (405) are fixedly mounted with fixing plates (406), both sides of the fixing plate (406) are fixedly mounted with blocking rods (609), and the blocking rods (609) are movably inserted into the limit frames (608).

7. A gravity energy storage system based on a mechanically coupled flywheel according to claim 1, characterized in that: A metal guide rail (102) is fixedly mounted on one side of the support frame (101), the metal guide rail (102) is adapted to a counterweight (103), an electromagnet (104) is mounted on the side of the counterweight (103), a power transmission line (105) is mounted on one side of the metal guide rail (102), the power transmission line (105) is used to supply power to the electromagnet (104), a base (100) is fixedly mounted on the bottom of the support frame (101), a buffer pad (106) is fixedly mounted on the top of the base (100), and a laser radar (107) is mounted on the top of the base (100).

8. A gravity energy storage system based on a mechanically coupled flywheel according to claim 1, characterized in that: It also includes a landing control system, which is used to control the counterweight block (103) to buffer and decelerate to zero speed when the counterweight block (103) is landing to perform power peak regulation, and the landing control system includes: A distance monitoring unit, a speed monitoring unit and a determination unit, wherein the distance monitoring unit is used to monitor the position of a counterweight (103) during the descent along a metal guide rail (102) and determine whether to activate an electromagnet (104) to provide an electromagnetic force to assist the counterweight (103) in decelerating, the speed monitoring unit is used to detect the speed of the counterweight (103) during the descent and determine whether to activate the electromagnet (104), and the determination unit is used to activate the electromagnet (104) and adjust the electromagnetic force of the electromagnet (104) when assisting the counterweight (103) in decelerating, so as to assist the counterweight (103) in decelerating to zero speed when it descends along the metal guide rail (102) to the bottom of the metal guide rail (102).

9. A gravity energy storage system based on a mechanically coupled flywheel according to claim 8, characterized in that: The distance monitoring unit is provided with a position determination strategy, the position determination strategy including a critical threshold and an approach threshold, the critical threshold representing the position at which the counterweight (103) reaches a buffering deceleration position, the approach threshold representing the position at which the counterweight (103) reaches an electromagnet (104) and starts to return to zero deceleration, the distance of the counterweight (103) along the height direction is monitored by a laser radar (107), and whether the weight passes the critical threshold and the approach threshold position is identified, when the counterweight (103) passes the critical threshold, the speed of the counterweight (103) is determined to control the start or shut down of the electromagnet (104), when the counterweight (103) reaches the approach threshold position, the electromagnet (104) is controlled to provide a buffering magnetic force to assist the counterweight (103) to decelerate to zero speed when it moves along the metal guide rail (102) to the bottom.

10. A gravity energy storage system based on a mechanically coupled flywheel according to claim 8, characterized in that: The speed monitoring unit is configured with a process strategy, which includes configuring a speed threshold, obtaining the real-time speed of the counterweight (103) when the counterweight (103) moves to a critical threshold, and judging whether the real-time speed is greater than or equal to the speed threshold. If the real-time speed is greater than or equal to the speed threshold, a start signal is generated, and the electromagnet (104) is controlled to work based on the start signal and to provide an electromagnetic force to assist the counterweight (103) in buffering deceleration. If the real-time speed is less than the speed threshold, a standby signal is generated, and the electromagnet (104) is controlled to be in a standby state based on the standby signal.

11. A gravity energy storage system based on a mechanically coupled flywheel according to claim 8, characterized in that: The determination unit is provided with a magnetic force regulation strategy, which includes obtaining a real-time speed when identifying a start signal or a standby signal, and predicting a change in the speed of the counterweight (103) along the metal guide rail (102) from a critical threshold to an approach threshold, so as to predict an approach speed when the counterweight (103) reaches the approach threshold position, generating an adjustment curve for electromagnetic force regulation of the electromagnet (104) based on the approach speed, and regulating the electromagnetic force of the electromagnet (104) based on the adjustment curve, so as to decelerate the counterweight (103) to a speed of zero when the counterweight (103) moves to the bottom of the metal guide rail (102).

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