Power generation equipment combining gravity and flywheel energy storage and power generation method thereof

Abstract

The invention discloses power generation equipment combining gravity and flywheel energy storage and a power generation method of the power generation equipment, relates to the technical field of power generation technologies, and solves the technical problems of high construction cost and relatively low economic benefits in an existing technical scheme. A potential energy storage unit is slidably mounted in the main stand column, a traction machine is mounted 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 rotatably mounted in the main stand column, and a friction wheel is fixedly mounted 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 invention relates to the technical field of power generation, and specifically to a device for power generation combining gravity and flywheel energy storage and a power generation method thereof. Background Art

[0003] After years of unremitting efforts, we have overcome many key technical difficulties in the field of mechanical energy storage. Under the guidance of changing ideas and breaking conventions, a recent experiment unexpectedly showed that the energy storage device has a wide energy storage range and is expected to be upgraded to a level comparable to that of conventional power stations, which provides an ideal solution to solve energy problems.

[0004] Our energy storage method uses off-peak electricity prices to collect energy and releases energy during peak electricity prices to obtain the price difference. This solution has a short setting period and quick results. The installed capacity can be flexibly adjusted according to demand calculations. The construction period only takes about ten days, and the construction cost is less than one-third of that of a photovoltaic power station. By measuring the current peak, off-peak and normal electricity prices in the local electricity market, it is conservatively estimated that the cost can be recovered within one year (without considering government subsidies).

[0005] This innovative energy storage solution can not only alleviate the pressure on the power grid, but also provide higher economic benefits for the electricity market, which is 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. Invention content

[0007] In view of the deficiencies in the prior art, the present invention provides a device and a method for generating electricity by combining gravity and flywheel energy storage, thereby solving the technical problems of the prior art solutions with high construction costs and low economic benefits.

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

[0009] Preferably, the potential energy storage unit comprises a gravity slider, which is slidably installed in the main column, and the side wall surface of the gravity slider is frictionally contacted with 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 contacted with 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 meshingly connected with the rack.

[0014] A device for generating power by combining gravity and flywheel energy storage, characterized in that the following includes a method of use: S1. First, in a range of relatively low electricity prices, enter an energy storage cycle, connect to the power grid, input power from the power grid into a traction machine, and the traction machine drive end rotates to pull the potential energy storage unit to rise and fix the position to store potential energy; S2. Then, in a range of relatively high electricity prices, enter a power generation cycle, and the traction machine drive end releases the potential energy storage unit to convert the gravitational potential energy stored in the potential energy storage unit; S3. The potential energy storage unit falls, and the friction wheel is driven to rotate by friction, and the main shaft is driven to rotate by the fixed connection between the friction wheel and the main shaft; S4. The energy storage flywheel is driven to rotate by the rotation of the main shaft, and the energy storage flywheel stores mechanical energy and keeps the main shaft rotating by inertia; S5. The driving pulley is driven to rotate by the rotation of the main shaft, and the driving pulley drives the driven pulley to rotate through the transmission belt, and the driven pulley drives the input end of the generator 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, it is incorporated into the power grid for power generation.

[0015] Beneficial Effects

[0016] The present invention provides a device for power generation combining gravity and flywheel energy storage and a power generation method thereof. Compared with traditional energy storage technologies such as lithium batteries and pumped storage, the present invention has a lower construction cost, mainly utilizes 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, easy to assemble and maintain, and saves manpower and material costs. The system can flexibly adjust the energy storage and release strategies according to changes in grid load and electricity prices, and enhance the flexibility and adaptability of energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a schematic diagram of the main cross-sectional structure of a device combining gravity and flywheel energy storage for power generation and a power generation method thereof.

[0018] Figure 2 The present invention provides a schematic diagram of the side cross-sectional structure of a device combining gravity and flywheel energy storage for power generation and a power generation method thereof.

[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 explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. The detailed description is as follows.

[0021] See also Figure 1-2The present invention provides a technical solution: a device for generating electricity by combining gravity and flywheel energy storage, comprising a base 1, a main column 2 is fixedly installed on the upper wall of the base 1, a potential energy storage unit is slidably installed in the main column 2, a traction machine 3 is installed on the upper end of the main column 2, and the 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 installed in the main column 2, a friction wheel 6 is fixedly installed on one end of the main shaft 5, an energy storage flywheel 7 is fixedly installed on the other end of the main shaft 5, a driving pulley 8 is fixedly installed on the other end of the main shaft 5, a generator 9 is fixedly installed on the base 1, a driven pulley 10 is fixedly installed on the input end of the generator 9, and a transmission belt 11 is 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 , and the gravity slider 12 is slidably installed in the main column 2 , and the side wall surface of the gravity slider 12 is frictionally contacted and connected 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 contacted 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 as follows: 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 combining gravity and flywheel energy storage for power generation, characterized in that the following includes a method of use: S1. First, in a range of relatively low electricity prices, enter an energy storage cycle, connect to the power grid, input power from the power grid into a 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 relatively high electricity prices, enter a power generation cycle, and the driving end of the traction machine 3 releases the potential energy storage unit to convert the gravitational potential energy stored in the potential energy storage unit; S3. The potential energy storage unit falls, and the friction wheel 6 is driven to rotate by friction. , 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 for power generation.

[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 electric energy into kinetic energy, and the gravity slider 12 is pulled up to the set height to store the gravity 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, using similar well-known technical means, so 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] Particularly: 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 meshingly connected with the rack.

[0040] Combination of gear and rack transmission: The meshing connection between gear and rack can more effectively convert gravitational potential energy into mechanical energy. The rotation of the gear can achieve greater torque transmission, thereby improving the rotation efficiency of the friction wheel, thereby improving the energy conversion efficiency of the entire system. Compared with the traditional friction wheel design, gear meshing can reduce the energy loss caused by sliding friction. Gear meshing is mainly rolling friction, which can improve energy utilization and reduce heat loss compared to sliding friction. The use of gear and rack structure can reduce the failure mode risk of the system through better structural characteristics. Under heavy load or working environment, the gear transmission can also maintain good stability, avoid slipping caused by sliding, and ensure the smoothness of transmission. The combination of gear and rack makes the speed control more precise, and the gear model or gear ratio can be adjusted according to different working requirements, so as to flexibly adjust the system operation within different electricity price ranges to obtain the best economic benefits. The gear and rack structure is relatively simple, which can facilitate local replacement and maintenance in the event of a fault, improving the maintainability and operability of the system. The gear transmission system can be designed with different gear ratios, so that it can better adapt to changing load requirements and achieve efficient power generation and energy storage processes.

[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 is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments 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), It is 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. A device for generating electricity by combining gravity and flywheel energy storage according to claim 1, Features The potential energy storage unit comprises a gravity slider (12), which is slidably mounted in the main column (2), and the side wall of the gravity slider (12) is frictionally contacted with the friction wheel (6).

3. A device for generating electricity by combining gravity and flywheel energy storage according to claim 1, Features The potential energy storage unit further comprises a friction jacket (13), the friction jacket (13) being slidably mounted in the main column (2), the side wall of the friction jacket (13) being frictionally contacted with the friction wheel (6), and a gravity ball (14) being connected to the traction rope (4) of the traction machine (3), and the gravity ball (14) being capable of falling into the friction jacket (13).

4. A device for generating electricity by combining gravity and flywheel energy storage according to claim 1, Features The base (1) is provided with a buffer portion, the buffer portion comprising 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. A device for generating electricity by combining gravity and flywheel energy storage according to claim 1, Features A return spring (17) is connected between the main column (2) and the potential energy storage unit.

6. A device for generating electricity by combining gravity and flywheel energy storage according to any one of claims 2 or 3, Features 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 meshingly connected with the rack.

7. A device for generating electricity by combining gravity and flywheel energy storage according to any one of claims 1 to 6, Features The following includes a method of use: S1. First, in a range of relatively 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 relatively 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 wheel (6) is driven to rotate by friction, and the main shaft (5) is driven by the fixed connection between the friction wheel (6) and the main shaft (5). The shaft (5) rotates; S4, the energy storage flywheel (7) is driven to rotate by the rotation of the main shaft (5), the energy storage flywheel (7) stores mechanical energy and keeps the main shaft (5) rotating by inertia; S5, the driving pulley (8) is driven to rotate by 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 and 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 for power generation.

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