Power generation equipment combining gravity and flywheel energy storage

Abstract

The utility model discloses a power generation device combining gravity and flywheel energy storage and a power generation method of the power generation device, relates to the technical field of power generation technologies, and solves the technical problems of high construction cost and lower economic benefits in the existing technical scheme. A potential energy storage unit is installed in the main stand column in a sliding mode, a traction machine is installed at the upper end of the main stand column, the driving end of the traction machine is connected to the upper end of the potential energy storage unit through a traction rope, a main shaft is installed in the main stand column in a rotating mode, and a friction wheel is fixedly installed at one end of the main shaft. The gravity and flywheel technology is mainly utilized, the investment of materials and equipment is reduced, and the economical efficiency is better; the electricity price difference can be effectively utilized, and higher economic return can be realized; stable power output can be provided, and the power grid stability is enhanced; the equipment is relatively simple in design and easy to assemble and maintain, and manpower and material resource cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation, in particular to a device for generating power by combining gravity and flywheel energy storage and a power generation method thereof. Background Art

[0002] In the technical field involved in this utility model, against the backdrop of global carbon neutrality and carbon peak, the installed grid-connected capacity of renewable energy continues to increase, placing unprecedented pressure on the power grid system. Consequently, there is an urgent need to resolve the contradiction between energy supply and demand. In response to the national policy of promoting energy transformation, the construction of energy storage power stations is receiving increasing attention.

[0003] After years of unremitting efforts, we have overcome several key technical challenges in the field of mechanical energy storage. Guided by a shift in thinking and a desire to break with convention, a recent experiment unexpectedly demonstrated that this energy storage device has a broad energy storage range, potentially reaching levels comparable to conventional power plants. This provides an ideal solution to energy challenges.

[0004] Our energy storage approach utilizes off-peak electricity prices to collect energy and releases it during peak periods, profiting from the price difference. This solution offers a short setup period and rapid results. The installed capacity can be flexibly adjusted based on demand, and the construction period is only about ten days, costing less than one-third of that of a photovoltaic power plant. Based on current peak, off-peak, and normal-time electricity prices in the local electricity market, we conservatively estimate that the cost will be recovered within one year (not taking into account government subsidies).

[0005] This innovative energy storage solution not only alleviates the pressure on the power grid, but also provides higher economic benefits for the electricity market, in line with the current goals and requirements of energy transformation.

[0006] The existing technical solutions have the technical problems of high construction cost and low economic benefits. Utility Model Content

[0007] In response to the deficiencies of the existing technology, the present invention provides a device and a method for generating electricity by combining gravity and flywheel energy storage, which solves the technical problems of the existing technical solutions, such as high construction cost and low economic benefits.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device that combines gravity and flywheel energy storage for power generation, comprising a base, a main column fixedly mounted on the upper wall of the base, a potential energy storage unit slidably mounted in the main column, a traction machine mounted on the upper end of the main column, a driving end of the traction machine being connected to the upper end of the potential energy storage unit through a traction rope, a main shaft rotatably mounted in the main column, a friction wheel fixedly mounted on one end of the main shaft, an energy storage flywheel fixedly mounted on the other end of the main shaft, a driving pulley fixedly mounted on the other end of the main shaft, a generator fixedly mounted on the base, a driven pulley fixedly mounted on the input end of the generator, and a transmission belt connected to the driven pulley and the driving pulley.

[0009] Preferably, the potential energy storage unit includes a gravity slider, which is slidably installed in the main column, and the side wall surface of the gravity slider is frictionally connected to the friction wheel.

[0010] Preferably, the potential energy storage unit also includes a friction jacket, which is slidably installed in the main column, and the side wall of the friction jacket is frictionally connected to the friction wheel. A gravity ball is connected to the traction rope of the traction machine, and the gravity ball can fall into the friction jacket.

[0011] Preferably, a buffer portion is provided on the base, and the buffer portion includes a buffer damper. The buffer damper is fixedly mounted on the base, and a buffer spring is connected between the telescopic end of the buffer damper and the base.

[0012] Preferably, a return spring is connected between the main column and the potential energy storage unit.

[0013] Preferably, the friction wheel can be a gear, a rack is fixedly mounted on the side wall of the potential energy storage unit, and the gear is meshed with the rack.

[0014] A device for combining gravity and flywheel energy storage for power generation, characterized by the following method of use: S1. First, in a range of low electricity prices, entering an energy storage cycle, connecting to the power grid, inputting grid power into the traction machine, and rotating the traction machine drive end to pull the potential energy storage unit upward and fixed in position to store potential energy; S2. Then, in a range of high electricity prices, entering a power generation cycle, the traction machine drive end releases the potential energy storage unit, and converts the gravitational potential energy stored in the potential energy storage unit; S3. The potential energy storage unit falls, and friction drives the friction wheel to rotate, which in turn drives the main shaft to rotate through the fixed connection between the friction wheel and the main shaft; S4. The rotation of the main shaft drives the energy storage flywheel to rotate, which stores mechanical energy and maintains the rotation of the main shaft through inertia; S5. The rotation of the main shaft drives the driving pulley to rotate, which drives the driven pulley to rotate via the transmission belt, and the driven pulley drives the generator input end to rotate, thereby driving the generator to rotate and generate electricity; S6. The voltage, frequency, and phase of the generator electricity are adjusted, and after passing through a protective device, the electricity is integrated into the power grid for power generation.

[0015] Beneficial effects

[0016] The present invention provides a device and a power generation method combining gravity and flywheel energy storage. Compared with traditional energy storage technologies such as lithium batteries and pumped storage, the construction cost of the device is lower. It mainly uses gravity and flywheel technology, reduces the investment in materials and equipment, and is more economical. By storing energy during periods of low electricity prices and releasing energy during periods of high electricity prices, the price difference of electricity can be effectively utilized to achieve higher economic returns. The device adopts a combination of gravity potential energy and flywheel storage technology to improve the efficiency of energy storage and release. The collected potential energy can be efficiently converted into mechanical energy and further converted into electrical energy. The flywheel energy storage system has a high power density and good dynamic response capability, can provide smooth power output, reduce grid fluctuations, and enhance grid stability. The device is relatively simple in design and easy to assemble and maintain, saving manpower and material costs. The system can flexibly adjust the energy storage and release strategy according to changes in grid load and electricity prices, thereby enhancing the flexibility and adaptability of energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of a device for generating electricity by combining gravity and flywheel energy storage and a power generation method thereof as described in the present invention.

[0018] Figure 2 This is a side cross-sectional structural schematic diagram of a device combining gravity and flywheel energy storage for power generation and a power generation method thereof as described in the present invention.

[0019] In the figure: 1. Base; 2. Main column; 3. Traction machine; 4. Traction rope; 5. Main shaft; 6. Friction wheel; 7. Energy storage flywheel; 8. Driving pulley; 9. Generator; 10. Driven pulley; 11. Transmission belt; 12. Gravity slider; 13. Friction jacket; 14. Gravity ball; 15. Buffer damper; 16. Buffer spring; 17. Return spring. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The detailed description is as follows.

[0021] See also Figure 1-2 The utility model provides a technical solution: a device for generating electricity by combining gravity and flywheel energy storage, comprising a base 1, a main column 2 fixedly mounted on the upper wall of the base 1, a potential energy storage unit slidably mounted in the main column 2, a traction machine 3 mounted on the upper end of the main column 2, a driving end of the traction machine 3 is connected to the upper end of the potential energy storage unit through a traction rope 4, a main shaft 5 rotatably mounted in the main column 2, a friction wheel 6 fixedly mounted on one end of the main shaft 5, an energy storage flywheel 7 fixedly mounted on the other end of the main shaft 5, a driving pulley 8 fixedly mounted on the other end of the main shaft 5, a generator 9 fixedly mounted on the base 1, a driven pulley 10 fixedly mounted on the input end of the generator 9, and a transmission belt 11 connected to the driven pulley 10 and the driving pulley 8.

[0022] This embodiment is further configured such that the potential energy storage unit includes a gravity slider 12 , which is slidably installed in the main column 2 , and the side wall surface of the gravity slider 12 is frictionally contacted with the friction wheel 6 .

[0023] This embodiment is further configured such that the potential energy storage unit also includes a friction jacket 13, which is slidably installed in the main column 2, and the side wall of the friction jacket 13 is frictionally connected with the friction wheel 6, and a gravity ball 14 is connected to the traction rope 4 of the traction machine 3, and the gravity ball 14 can fall into the friction jacket 13.

[0024] This embodiment is further configured such that a buffer portion is provided on the base 1 , and the buffer portion includes a buffer damper 15 . The buffer damper 15 is fixedly mounted on the base 1 , and a buffer spring 16 is connected between the telescopic end of the buffer damper 15 and the base 1 .

[0025] This embodiment is further configured such that a return spring 17 is connected between the main column 2 and the potential energy storage unit.

[0026] A device that combines gravity and flywheel energy storage for power generation, characterized by the following including a method of use: S1. First, in a range of low electricity prices, enter the energy storage cycle, connect to the power grid, input the power grid electricity into the traction machine 3, and the driving end of the traction machine 3 rotates to pull the potential energy storage unit to rise and fix the position to store potential energy; S2. Then, in a range of high electricity prices, enter the power generation cycle, the driving end of the traction machine 3 releases the potential energy storage unit, and converts the gravitational potential energy stored in the potential energy storage unit; S3. The potential energy storage unit falls, and the friction force drives the friction wheel 6 to rotate. , the main shaft 5 is driven to rotate through the fixed connection between the friction wheel 6 and the main shaft 5; S4, the energy storage flywheel 7 is driven to rotate through the rotation of the main shaft 5, the energy storage flywheel 7 stores mechanical energy, and keeps the main shaft 5 rotating through inertia; S5, the driving pulley 8 is driven to rotate through the rotation of the main shaft 5, the driving pulley 8 drives the driven pulley 10 to rotate through the transmission belt 11, the driven pulley 10 drives the input end of the generator 9 to rotate, and then drives the generator 9 to rotate to generate electricity; S6, the voltage, frequency and phase of the electricity of the generator 9 are adjusted, and after passing through the protection device, it is connected to the power grid to generate electricity.

[0027] The detailed connection means are well known in the art; Figure 1-2 As shown, the usage is as follows: Energy storage cycle (S1):

[0028] During the period of low electricity price, the equipment is connected to the grid. The traction machine 3 is started to convert the electrical energy into kinetic energy, and the gravity slider 12 is pulled up to the set height to store the gravitational potential energy in a fixed position.

[0029] Power generation cycle (S2):

[0030] When the electricity price is at its peak, the traction machine 3 releases the gravity slider 12 to make it fall, and the gravitational potential energy is converted into mechanical energy.

[0031] Energy conversion (S3, S4):

[0032] The sliding block falls and drives the friction wheel 6 to rotate through the friction force. The friction wheel 6 is connected to the main shaft 5 and drives the main shaft 5 to rotate.

[0033] As the main shaft 5 rotates, the energy storage flywheel 7 also rotates to store mechanical energy.

[0034] Power generation process (S5):

[0035] The rotation of the main shaft 5 drives the driving pulley 8 to rotate, and the driving pulley 8 drives the driven pulley 10 through the transmission belt 11, thereby driving the generator 9 to work.

[0036] Power output (S6):

[0037] The current output by the generator 9 is adjusted in voltage, frequency and phase by the control system to ensure that it meets the access standards of the power grid, and is finally connected to the power grid through the protection device.

[0038] In particular, a one-way drive structure, such as a ratchet structure, can be set between the friction wheel 6 and the main shaft 5, and similar well-known technical means can be used to ensure that the friction wheel 6 will not drive the main shaft 5 to rotate when the traction machine 3 pulls the potential energy storage unit upward, and will not affect the reverse rotation of the generator 9.

[0039] In particular, the friction wheel can be a gear, a rack is fixedly mounted on the side wall of the potential energy storage unit, and the gear is meshed with the rack.

[0040] A rack-and-pinion transmission system: The meshing connection of a gear and rack more efficiently converts gravitational potential energy into mechanical energy. Gear rotation enables greater torque transmission, improving the rotational efficiency of the friction wheel and, consequently, the energy conversion efficiency of the entire system. Compared to traditional friction wheel designs, gear meshing reduces energy loss caused by sliding friction. Gear meshing primarily involves rolling friction, which, compared to sliding friction, improves energy utilization and reduces heat loss. The use of a rack-and-pinion structure reduces the risk of system failure modes through improved structural characteristics. Even under heavy loads or operating conditions, the gear transmission maintains excellent stability, preventing slippage caused by sliding and ensuring smooth transmission. The combination of a rack and pinion system enables more precise speed control, allowing for adjustable gear types and gear ratios to meet specific operating requirements, enabling flexible system operation within varying electricity price ranges for optimal economic benefits. The relatively simple rack-and-pinion structure facilitates partial replacement and maintenance in the event of a fault, improving system maintainability and operability. The gear transmission system can be designed with varying gear ratios to better adapt to varying load requirements, enabling efficient power generation and energy storage.

[0041] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for generating electricity by combining gravity and flywheel energy storage, comprising a base (1), characterized in that: A main column (2) is fixedly mounted on the upper wall of the base (1), a potential energy storage unit is slidably mounted in the main column (2), a traction machine (3) is mounted on the upper end of the main column (2), a driving end of the traction machine (3) is connected to the upper end of the potential energy storage unit through a traction rope (4), a main shaft (5) is rotatably mounted in the main column (2), a friction wheel (6) is fixedly mounted on one end of the main shaft (5), an energy storage flywheel (7) is fixedly mounted on the other end of the main shaft (5), a driving pulley (8) is fixedly mounted on the other end of the main shaft (5), a generator (9) is fixedly mounted on the base (1), a driven pulley (10) is fixedly mounted on the input end of the generator (9), and a transmission belt (11) is connected between the driven pulley (10) and the driving pulley (8).

2. The device for combining gravity and flywheel energy storage and power generation according to claim 1, characterized in that The potential energy storage unit includes a gravity slider (12), which is slidably installed in the main column (2), and the side wall of the gravity slider (12) is frictionally contacted with the friction wheel (6).

3. The device for combining gravity and flywheel energy storage and power generation according to claim 1, characterized in that The potential energy storage unit further comprises a friction jacket (13), which is slidably mounted in the main column (2), and the side wall of the friction jacket (13) is in frictional contact with the friction wheel (6). A gravity ball (14) is connected to the traction rope (4) of the traction machine (3), and the gravity ball (14) can fall into the friction jacket (13).

4. The device for combining gravity and flywheel energy storage and power generation according to claim 1, characterized in that A buffer portion is provided on the base (1), and the buffer portion includes a buffer damper (15). The buffer damper (15) is fixedly mounted on the base (1), and a buffer spring (16) is connected between the telescopic end of the buffer damper (15) and the base (1).

5. The device for generating electricity by combining gravity and flywheel energy storage according to claim 1, characterized in that A return spring (17) is connected between the main column (2) and the potential energy storage unit.

6. The device for combining gravity and flywheel energy storage and power generation according to claim 2 or 3, characterized in that The friction wheel (6) can be a gear, and a rack is fixedly installed on the side wall of the potential energy storage unit, and the gear is meshed with the rack.

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