Liquid carrying rotor type energy storage device and use method

Abstract

The invention discloses a liquid carrying rotor type energy storage device and a using method, and relates to the technical field of energy storage. The energy storage device comprises a frame and a rotor arranged in the frame, the upper surface of the rotor is circular, the rotor floats on the surface of the liquid, and a motor arranged on a sliding rail is arranged on the upper surface of the rotor. In the energy storage mode, when RMP * r = RMP2 * r2, deltar1 = r2-RMP * r / (RMP2 + M) is calculated, a driving wheel of the motor is moved by deltar1 towards the circle center direction of the rotor, and the motor drives the rotor to rotate to store energy; in the power generation process, when RMP * r = RMP4 * r4, delta r2 = RMP * r / (RMP4-M)-r4 is calculated, the driving wheel of the motor is moved by delta r2 towards the edge direction of the rotor, and the rotor drives the motor to generate power. The rotor is supported by liquid, and the defect that flywheel energy storage is limited to a gravity supporting technology and is not prone to large scale is overcome. The stable output of the generator is realized by placing the driving wheels at different positions.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, in particular to flywheel energy storage, and specifically to a liquid-supported rotor type energy storage device and a use method thereof. Background Art

[0002] The development of mankind is actually accompanied by the development and utilization of energy, especially the development and application of renewable energy such as wind energy, tidal energy, solar energy, etc., which makes the source of energy more abundant from the original limited energy such as fossil fuels and nuclear energy.

[0003] The characteristics of new energy cannot guarantee continuous output or stable utilization. For example, tidal energy is intermittent due to the periodic rise and fall of ocean tides, and its stability is also affected by the size, speed and slowness of the tides. Wind energy is affected by gusts, and solar energy is affected by uncontrollable intermittent and unstable factors such as cloudy and sunny weather. In addition, human electricity consumption has peak and valley periodicity. It is not enough during peak hours and wasted during valley hours. Therefore, energy storage technology that can promote the efficient use of energy is very important.

[0004] The existing energy storage technologies mainly include: battery packs, capacitors, pumped storage power stations, flywheel batteries, etc. In actual market promotion and application, their costs are still too high, they have great safety risks, are not conducive to environmental protection, are difficult to operate profitably, and are not conducive to promotion.

[0005] Pumped storage power stations (such as Zhanghewan Pumped Storage Power Station in Hebei) discharge and lift the water stored in the upper and lower reservoirs, and utilize the mutual conversion of water potential energy and electrical energy to reduce peak loads and fill valleys for the power grid. Pumped storage power stations have expensive infrastructure and rely on limited resources. The evaporation and leakage of reservoir water directly lead to low conversion efficiency, making it difficult for power stations to make a profit.

[0006] Flywheel batteries are essentially devices that store mechanical energy and then convert it into electrical energy. Compared with chemical batteries, they are safer, especially durable and environmentally friendly, and are a good development direction in the field of energy storage. However, we also see that, first, flywheel batteries have high requirements for bearings due to high speeds, and magnetic bearings are the most suitable, but magnetic bearings cannot carry large mass flywheels, which limits the design of high-power flywheel batteries; second, high speeds also have extremely high requirements for flywheel materials, and even expensive fiber materials must be used; third, high speeds also mean large speed differences. In order to output stable electrical energy, flywheel batteries also require mechanical speed regulation or electronic control systems, which adds to the cost. Such high costs are not conducive to market promotion. Moreover, even if a non-mass flywheel reaches a speed of more than 100,000, its total kinetic energy still cannot meet the real needs of the market; fourth, once a high-speed flywheel loses control, it will be a huge accident; the above four problems are obstacles to the development of flywheel batteries in the energy storage market.

[0007] The Chinese patent application number 201780011417.X proposes a flywheel energy storage device and a method of using the same, wherein the flywheel energy storage device comprises at least one rotating element capable of floating and rotating on and / or in a liquid, at least one element capable of transferring energy to the rotating element, and at least one generator capable of transferring the energy from the rotating element, wherein the rotating element is shaftless. The rotating element is at least partially hollow and at least partially fillable with liquid.

[0008] The rotating element floats on the surface of a circular artificial reservoir made of solid material such as concrete, metal plates, etc., the walls of which represent the limits of movement of the rotating element. The rotating element is surrounded by a stator, on which an engine and a generator are arranged, the diameter of the engine and the generator used being larger than the rotating element. The rotating parts of the engine and the rotating parts of the generator 3 are connected to the rotating element using ropes, respectively.

[0009] The device disclosed seems to use ropes to connect the rotating element to the stator through the engine and generator and to limit it in the middle of the stator.

[0010] As an energy storage rotor, the volume of the rotating element is usually relatively large. In the above disclosure, the diameter of the engine and the generator is larger than the diameter of the rotating element. If a larger capacity energy storage device is built, a large-sized engine and generator are required to match it, which is costly. Summary of the invention

[0011] In order to solve the above-mentioned defects, the present invention is proposed.

[0012] To achieve the above-mentioned purpose, the present invention proposes a liquid-supported rotor energy storage device on one hand, which includes a frame and a rotor with a circular upper surface arranged inside the frame; the rotor floats on the surface of the liquid, and a slideway is arranged on the upper part of the frame, which is higher than the upper surface of the rotor, parallel to the upper surface of the rotor and passes through the center of the rotor, and the motor is arranged on the slideway through a driver; a limit sleeve is arranged at the center position of the top and bottom of the frame; a shaft rod is arranged at the center of the rotor, and the shaft rod and two limit sleeves cooperate to limit the rotor in the frame; a magnetic homopolar repulsion matrix is ​​arranged at both ends of the shaft rod and the limit sleeve to eliminate friction between the two.

[0013] Furthermore, the driving wheel of the motor is a friction wheel made of rubber, and the upper surface of the rotor is rough.

[0014] On the other hand, based on the above device, the present invention also proposes a method for using a liquid-supported rotor-type energy storage device, the method comprising: Install a liquid-supported rotor energy storage device.

[0015] In the energy storage mode, when the rotor is stationary, start the motor and make the driving wheel of the motor contact the edge of the upper surface of the rotor to drive the rotor to rotate; when the rotor rotates and the driving wheel of the motor is separated from the upper surface of the rotor, start the motor and calculate r1=RPM*r / (RPM1+M), where the speed of the motor driving wheel is RPM, the radius is r, the current speed of the rotor is RPM1, and the driving wheel of the motor is placed on the upper surface of the rotor at a position r1 away from the center of the rotor.

[0016] During the energy storage process, the rotor speed RPM2 and the distance r2 between the motor's driving wheel and the rotor center are detected in real time. When RPM*r= RPM2*r2, Δr1= r2-RPM*r / (RPM2+M) is calculated, and the motor's driving wheel is moved toward the rotor center by Δr1.

[0017] When energy storage is completed or the distance between the driving wheel of the motor and the center of the rotor is smaller than the diameter of the driving wheel, the driving wheel of the motor is lifted.

[0018] In output mode, when power generation starts, obtain the rotor speed RPM3, calculate r3=RPM*r / (RPM3-M), place the driving wheel of the motor on the upper surface of the rotor at a position r3 away from the center of the rotor, and the motor drives the driving wheel to rotate through the rotor to generate electricity.

[0019] During the power generation process, the rotor speed RPM4 and the distance r4 between the motor's driving wheel and the rotor center are detected in real time. When RPM*r= RPM4*r4, Δr2=RPM*r / (RPM4-M)-r4 is calculated, and the motor's driving wheel is moved toward the edge of the rotor by Δr2.

[0020] When the power generation or the driving wheel of the motor reaches the edge of the rotor, lift the driving wheel of the motor.

[0021] The value range of M is 5-200.

[0022] When the device is in working condition, under the condition of electric energy input, the driving wheel of the motor contacts the upper end surface of the rotor, and the motor drives the driving wheel to rotate, which drives the rotor to rotate, and the electric energy is converted into mechanical energy for storage; after the electric energy input is completed, the driving wheel leaves the upper end surface of the rotor, and the rotor rotates freely to realize energy storage; when electric energy output is required, the driving wheel of the motor contacts the upper end surface of the rotor, the rotor drives the driving wheel to rotate, and the motor generates electricity.

[0023] Beneficial effects: 1. The energy stored in a flywheel is proportional to the mass of the flywheel and the square of its rotational speed. Doubling its mass will double the energy, and doubling its rotational speed will quadruple the energy. The present invention uses liquid to support the rotor, and the buoyancy overcomes gravity. When designing a flywheel energy storage device, there is no need to consider the lifting capacity of bearings or magnetic suspension. The rotor can be designed with a large mass based on large energy requirements, and large energy storage can be achieved even at low rotational speeds, thus overcoming the disadvantage that flywheel energy storage is limited to gravity support technology and is not easy to scale up.

[0024] 2. There is no restriction on the material of the rotor. Any material that can form a hollow structure can be used, such as ordinary steel, concrete, engineering plastics and other low-cost materials.

[0025] 3. A further solution is to design a generator that can slide centrifugally and centripetally. The linear speed of the rotor is different when it is close to and far from the center. When a large-mass and large-diameter rotor is used, the stable output of the generator can be achieved by placing the rotating wheel at different positions.

[0026] 4. The limiting sleeve and the rotor shaft are inlaid in a relative matrix with the same magnetic poles, which can get rid of the mechanical friction between the rotor shaft and the limiting sleeve, and overcome the difficulty that the greater the flywheel weight, the greater the bearing pressure and friction.

[0027] 5. The rotation of the rotor drives the surrounding liquid to form a circulation, which also contributes to energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1-Figure 3 Schematic diagrams of three liquid-supported rotor-type energy storage device embodiments of the present invention. Figure 4 It is a schematic diagram of the shaft limit sleeve cooperation.

[0029] Among them: 1 is the rotor, 1-1 is the reinforcing rod, 2 is the frame, 2-1 is the fixing frame, 2-2 is the connecting rod, 2-3 is the connecting piece, 2-4 is the discharge valve, 2-5 is the ring, 3 is the liquid, 4 is the shaft, 5 is the limit sleeve, 5-1 is the limit sleeve bracket, 6 is the gearbox, 6-1 is the gear, 7 is the slideway, 8 is the linear rail, 9 is the motor, 10 is the driver, 10-1 is the telescopic mechanism, 11 is the friction wheel, 12 is the steel cable, 13 is the magnetic block, 14 is the displacement sensor, and 15 is the turntable. DETAILED DESCRIPTION

[0030] Example 1.

[0031] A liquid-supported rotor energy storage device, see Figure 1, including a frame 2, and a rotor 1 arranged inside the frame 2. The rotor 1 is hollow, and the interior is a closed space, and can float on the surface of the liquid 3. The material of the rotor 1 can be ordinary steel, concrete, engineering plastics, etc. The outer shell of the rotor 1 has a certain thickness, and the cross section is a circular ring. The upper and lower diameters can be the same or different. After being placed in the liquid 3, it is ensured that the height exposed to the liquid surface is greater than 1 / 6 of the total height.

[0032] If the material used has a low density, a counterweight can be added to the inner edge of the rotor 1, and the counterweight can be a ring-shaped object, a weight fixed, etc. Regardless of the material used, it is necessary to ensure that the rotor 1 has balanced mass in all directions and stable rotation.

[0033] An open annular water tank or a closed annular water tank may also be provided inside the rotor 1 , and liquid may be injected into the water tank or the water tank for weight balance to ensure stable rotation of the rotor 1 .

[0034] The center of the rotor 1 is provided with a shaft 4 that passes through the rotor 1. The rotor 1 is fixed to the shaft 4 at the upper and lower end surfaces, and the shaft 4 can drive the rotor 1 to rotate. Since the rotor 1 is relatively large in size, a reinforcing rod 1-1 connecting the shaft 4 and the inner wall of the rotor 1 is provided inside it, and multiple groups of reinforcing rods 1-1 can be provided.

[0035] The frame 2 is a frame structure surrounding the rotor 1 , including a frame body, a connecting rod 2 - 2 connecting the frame body and the fixing rod 2 - 1 , and the depth of the frame body is greater than the height of the rotor 1 .

[0036] Limit sleeves 5 are respectively provided at the center positions of the top and bottom of the frame 2 ; the shaft 4 of the rotor 1 cooperates with the two limit sleeves 5 to limit the rotor 1 in the frame 2 .

[0037] The upper surface of the rotor 1 may be a plane, or may be set as an inclined surface with a high middle and low periphery. Regardless of the setting, the slideway 7 is parallel to the upper surface of the rotor 1 .

[0038] The top limiting sleeve 5 is arranged at the center of the fixing rod 2 - 1 , and the bottom limiting sleeve 5 is fixed by a limiting sleeve bracket 5 - 1 , and a gap is left between the bottom limiting sleeve 5 and the bottom of the frame 2 .

[0039] See also Figure 4 , the two ends of the shaft rod 4 and the limit sleeve 5 are provided with a magnetic homopolar repulsion matrix to eliminate the friction between the two. In the figure, 13 is a magnetic block, and the polarity of its exposed surface is the same.

[0040] For the purpose of energy storage, the device is provided with an electric motor for driving the rotor 1 to rotate; for the purpose of power generation, the device is provided with a generator for driving the rotor 1 to generate electricity.

[0041] In this embodiment, the motor and the generator are both motors 9 that can both generate electricity and generate power.

[0042] A slideway 7 and a parallel linear rail 8 are arranged on the upper part of the frame 2, which are parallel to the upper surface of the rotor 1 and radiate from the shaft 4. When two or more slideways 7 and parallel linear rails 8 are arranged, they must be evenly distributed. The motor 9 is arranged on the slideway 7 through the driver 10. The telescopic mechanism 10-1 matched with the driver 10 is connected to the motor 9, and the motor 9 is connected to the driving wheel. The telescopic mechanism 10-1 drives the driving wheel of the motor 9 to contact or leave the upper surface of the rotor 1.

[0043] One end of the slideway 7 is fixed on the connecting rod 2-2, and the other end is fixed on the ring 2-5 arranged at the position where the shaft rod 4 passes.

[0044] In the energy storage condition, the motor 9 acts as an electric motor, and the motor 9 drives the rotor 1 to rotate via the driving wheel.

[0045] In the power generation condition, the motor 9 acts as a generator, the rotor 1 drives the rotating wheel of the motor 9 to rotate, and the motor 9 generates electricity.

[0046] In this embodiment, the driving wheel and the rotating wheel are friction wheels 11. To cooperate with the work of the friction wheel 11, the upper surface of the rotor 1 is rough. The friction wheel 11 is made of rubber material.

[0047] As required, multiple motors 9 can be provided to work individually or simultaneously. In this embodiment, two motors 9 are symmetrically provided.

[0048] This embodiment is generally used in natural waters such as rivers, lakes, seas or open waters such as ponds, and the above-mentioned liquid 3 is water; a pool can also be built, and the liquid 3 uses an oily liquid with low tension.

[0049] Install a liquid-supported rotor energy storage device.

[0050] Taking the use in water as an example, when installing the device, first put the main body of the frame 2 into the water, and then put the rotor 1 into the frame 2. Since the rotor can float on the water surface, the vertical position is relatively fixed. At this time, the frame 2 is lifted so that the bottom end of the shaft 4 of the rotor 1 is inserted into the limit sleeve 5 at the bottom of the frame 2, and the bottom end of the shaft 4 is kept from contacting the bottom of the frame 2.

[0051] The ring 2 - 5 passes through the shaft 4 , connecting the connecting rod 2 - 2 together with the slideway 7 to the main body of the frame 2 .

[0052] The fixing frame 2 - 1 is connected to the connecting rod 2 - 2 , and the upper end of the shaft rod 4 is inserted into the limiting sleeve 5 at the top center position of the frame 2 .

[0053] The limiting sleeve 5 is located at the magnetic homopolar repulsion matrix position on the shaft rod 4 , and the two ends of the shaft rod 4 protrude from the two limiting sleeves 5 respectively, and it is ensured that the bottom end does not contact the bottom of the frame 2 .

[0054] To cope with unexpected situations, a turntable 15 can be provided at the position of the limit sleeve 5 at the bottom of the frame 2. Similarly, a turntable 15 can be provided at the position of the limit sleeve 5 at the top of the frame 2. Both ends of the shaft 4 are always limited in the two limit sleeves 5. Since the rotor 1 is in a floating state, the two turntables will not bear a large force.

[0055] The limiting sleeve 5 at the center position of the bottom of the frame 2 is spaced apart from the bottom of the frame 2, and the length of the magnetic homopolar repulsion matrix at both ends of the shaft rod 4 is 2-5 times the height of the limiting sleeve 5. Such a design can ensure that during the operation of the device, the rotor 1 is always limited by the shaft rod 4 in the two limiting sleeves 5 and homopolar repulsion is maintained.

[0056] The limiting sleeve 5 may also use a bearing.

[0057] Install the motor 9 and the drive device.

[0058] The installed device is hung on the steel cable 12 through the connector 2-3, and the steel cable 12 is fixed by a static object, such as a rock, a cement pile, etc.

[0059] The connecting piece 2-3 is arranged at the center of the fixing frame 2-1 to ensure that the center of gravity of the device is located at the connection point between the connecting piece 2-3 and the steel cable.

[0060] The above completes the installation of the device.

[0061] When external electricity is input for energy storage, the driver 10 drives the motor 9 to the outer edge of the upper surface of the rotor 1. When the external electricity inputs electric energy to make the motor 9 work, the telescopic mechanism 10-1 presses the friction wheel 11 to the upper surface of the rotor 1. Since it is at the outermost edge of the rotor 1, the linked friction wheel 11 is farthest from the radius of the shaft 4. Under the action of friction, the rotation of the friction wheel 11 can start the low-speed rotation of the rotor 1. Since the friction wheel 11 and the upper surface of the rotor 1 are in rolling contact, the linear speed of the contact point between the two can be different.

[0062] The friction wheel 11 and the upper surface of the rotor 1 do not contact at a single point. For ease of description, the “contact point” here refers to the center position of the friction wheel 11 .

[0063] When the linear speeds of the rotor 1 and the friction wheel 11 at the contact point are consistent, the friction wheel 11 slides along the slideway 7 toward the shaft 4, and the circumferential track of the friction wheel 11 around the upper surface of the rotor 1 becomes shorter. Even if the friction wheel 11 rotates at a constant speed, the rotation speed of the rotor 1 will become faster and faster, and the stored energy will become larger and larger. After reaching the shaft 4, the friction wheel 11 cannot speed up the rotation speed of the rotor 1. If the friction wheel 11 cannot increase the rotation speed, the rotation speed of the rotor 1 is the highest, and the stored energy is the largest. The driver 10 drives the friction wheel 11 to leave the upper surface of the rotor 1, and the rotor 1 rotates freely to achieve mechanical energy storage.

[0064] When outputting electric energy, the friction wheel 11 is at the shaft 4, and the driver 10 drives the friction wheel 11 to be pressed onto the upper surface of the rotor 1. Under the action of friction force, the friction wheel 11 rotates, and the motor 9 generates electricity. According to the voltage and current data of the generated electricity, the driver 10 drives the motor 9 to slide centrifugally toward the outer edge to adjust the rotation speed of the friction wheel 11 to achieve constant power generation.

[0065] By displacing the friction wheel 11 of the motor 9, approaching or moving away from the shaft 4, stepless speed change and high-efficiency energy conversion are achieved.

[0066] After installation, the use of the liquid-supported rotor energy storage device is as follows: In energy storage mode, electrical energy is converted into mechanical energy for storage.

[0067] When the device has no stored energy, that is, the rotor 1 is stationary, the motor 9 is started, and the driving wheel of the motor 9 is brought into contact with the edge of the upper surface of the rotor 1 to drive the rotor 1 to rotate.

[0068] During the energy storage process, the motor 9 is stopped, at which time the rotor 1 is in a rotating state and the driving wheel of the motor 9 is separated from the upper surface of the rotor 1. When energy is stored again, the motor 9 is started, and r1=RPM*r / (RPM1+M) is calculated, where the speed of the driving wheel of the motor 9 is RPM, the radius is r, and the current speed of the rotor 1 is RPM1. The driving wheel of the motor 9 is placed on the upper surface of the rotor 1 at a distance of r1 from the center of the rotor 1 (i.e., the center of the shaft 4).

[0069] When the linear velocity of the friction wheel 11 at the contact point is greater than the linear velocity of the rotor 1 at the contact point, the friction wheel can accelerate the rotation speed of the rotor 1. When the linear velocities of the two are the same, no acceleration effect is achieved.

[0070] The relationship between linear velocity v and angular velocity ω: v=ωr, r is the radius; the relationship between angular velocity ω and rotational speed RPM is ω=2π×RPM / 60, where RPM is the rotational speed per minute; the relationship between linear velocity v and rotational speed RPM: v=r×2π×RPM / 60, that is, the linear velocity is proportional to the radius and rotational speed.

[0071] The radius r of the driving wheel of the motor 9, ie, the friction wheel 11, remains unchanged. In the working state, it is assumed that its rotation speed RPM also remains unchanged.

[0072] If the linear velocity of the edge of the friction wheel 11 is the same as the linear velocity of a point on the upper surface of the rotor 1, then: r×2π×RPM / 60=r1×2π×RPM1 / 60, that is, at a position r1=RPM*r / RPM1 from the center of the upper surface of the rotor 1, the linear speeds of the rotor 1 and the edge of the friction wheel 11 are equal.

[0073] In order to drive the rotation of the rotor 1 , the friction wheel 11 of the motor 9 is placed on the upper surface of the rotor 1 at a position r1=RPM*r / (RPM1+M) away from the center of the rotor 1 . At this position, the linear velocity of the edge of the friction wheel 11 is higher than the linear velocity of the rotor 1 .

[0074] During the energy storage process, the speed of rotor 1 gradually increases. Real-time detection of the speed RPM2 of rotor 1 and the distance r2 between the friction wheel 11 of motor 9 and the center of rotor 1, when RPM*r= RPM2*r2, similarly, calculation Δr1= r2 - RPM*r / (RPM2+M), move the driving wheel of motor 9 toward the center of rotor 1 by Δr1.

[0075] r2 can be obtained by accumulating each step.

[0076] When energy storage is finished or the distance between the friction wheel 11 of the motor 9 and the center of the rotor 1 is smaller than the diameter of the friction wheel 11 , the driving wheel of the motor 9 is lifted.

[0077] In the output mode, in order to achieve stable power output, the speed RPM of the motor 9 is kept basically stable.

[0078] When starting to generate electricity, obtain the rotation speed RPM3 of the rotor 1, calculate r3=RPM*r / (RPM3-M), place the friction wheel 11 of the motor 9 on the upper surface of the rotor 1 at a position r3 away from the center of the rotor 1, and the motor 9 drives the friction wheel 11 to rotate through the rotor 1 to generate electricity.

[0079] At r3, the linear velocity of the upper surface of the rotor 1 is greater than the linear velocity required for the friction wheel 11 to reach RPM.

[0080] During the power generation process, the speed of the rotor 1 gradually slows down. The speed RPM4 of the rotor 1 and the distance r4 between the friction wheel 11 of the motor 9 and the center of the rotor 1 are detected in real time. When RPM*r= RPM4*r4, Δr2=RPM*r / (RPM4-M)- r4 is calculated, and the friction wheel 11 of the motor 9 is moved toward the edge of the rotor 1 by Δr2; at this position, the linear velocity of the upper surface of the rotor 1 is greater than the linear velocity required for the friction wheel 11 to reach RPM.

[0081] When the friction wheel 11 of the motor 9 reaches the edge of the rotor 1 , the friction wheel 11 of the motor 9 is lifted off the upper surface of the rotor 1 .

[0082] r4 can also be obtained by accumulating each step.

[0083] The value range of M is 5-200. The value of M is determined by the mass and radius of the rotor 1 and the indicators and working conditions of the motor 9. Generally, the value of M is larger in the energy storage working condition, such as M=100. In the power generation working condition, in order to ensure a relatively stable output, the value of M is smaller, such as M=10.

[0084] The device is not fixed in the horizontal direction, the liquid buoyancy has an upward horizontality, and the floating rotor 1 basically rotates along the vertical axis of the earth's gravity. The rotor 1 is limited by the liquid buoyancy, so the shaft 4 only needs to be limited by the limit sleeve 5. The rotor 1 basically rotates along the vertical axis, which reduces the influence of the gyroscopic effect caused by the rotation of the earth around its axis on the flywheel that rotates for a long time; the corresponding positions of the limit sleeve 5 and the shaft 4 are inlaid with the same magnetic poles in a relative matrix, getting rid of the ring mechanical friction between the rotor shaft 4 and the limit sleeve 5, and completely overcoming the difficulty of traditional flywheel energy storage that the heavier the flywheel, the greater the bearing pressure and friction.

[0085] The continuously variable speed system, in which the radius of the circle changes in direct proportion to the circular trajectory, improves the conversion efficiency and is safe, reliable and easy to control. When a large-mass and large-diameter rotor is used, constant-voltage and constant-current electrical energy can be output even when the rotor is rotating slowly.

[0086] Example 2.

[0087] See also Figure 2 On the basis of embodiment 1, the upper end of the shaft 4 is connected to the gearbox 6, and the output shaft of the gearbox 6 is installed with a power interface. The upper end of the shaft 4 is connected to the I axis of the gearbox 6, and the II axis of the gearbox 6 is installed with a power interface such as a gear 6-1 or a pulley.

[0088] The installation of the device is basically the same as that of Example 1. The steel cable 12 and the matching installation and connection components are omitted in the figure, which can be understood by those skilled in the art.

[0089] After the installation is completed, the method of using the device is based on Example 1. When storing energy, the clutch of the gearbox 6 is engaged, and the external kinetic energy connecting gear 6-1 can drive the rotor 1 to rotate through the gearbox 6, and the kinetic energy is stored in the rotor 1 to be converted into rotational mechanical energy. For example: the kinetic energy of the up and down movement of the caisson type tidal energy buoy drives the rotor 1 to rotate through the chain connecting gear 6-1.

[0090] When the stored energy is output, the gear 6 - 1 outputs mechanical energy as an interface, which can drive other mechanical operations, and can also output electrical energy by connecting other generators through the motor 9 or the gear 6 - 1 .

[0091] In this embodiment, external kinetic energy can be used to directly drive the rotor 1 to rotate for energy storage, and can also be used to directly drive the movement of external equipment without loss caused by the mutual conversion of kinetic energy and electrical energy.

[0092] Example 3.

[0093] See also Figure 3 On the basis of Example 1, the frame 2 is configured as a barrel-shaped structure, which is open on the top and partially closed on the bottom, and a discharge valve 2-4 is provided near the bottom.

[0094] When installing the device, first place the main body of the frame 2 in a flat position, and inject the liquid 3 from the opening position. The liquid 3 uses water or an oily liquid with low tension.

[0095] The rotor 1 is placed in the frame 2. The amount of liquid 3 injected is such that the bottom end of the shaft 4 of the rotor 1 is inserted into the limiting sleeve 5 at the bottom of the frame 2, and the bottom end of the shaft 4 is kept from contacting the bottom of the frame 2.

[0096] The upper surface of the frame 2 is bent inwardly to prevent the liquid 3 from overflowing due to the rotation of the rotor 1 .

[0097] The limiting sleeve 5 at the center position of the bottom of the frame 2 is spaced apart from the bottom of the frame 2, and the length of the magnetic homopolar repulsion matrix at both ends of the shaft rod 4 is 2-5 times the height of the limiting sleeve 5. Such a design can ensure that during the operation of the device, the rotor 1 is always limited in the two limiting sleeves 5 by the shaft rod 4, and homopolar repulsion is maintained, and the shaft rod 4 will not contact the bottom of the frame 2.

[0098] The ring 2 - 5 passes through the shaft 4 , connecting the connecting rod 2 - 2 together with the slideway 7 to the main body of the frame 2 .

[0099] The fixing frame 2 - 1 is connected to the connecting rod 2 - 2 , and the upper end of the shaft rod 4 is inserted into the limiting sleeve 5 at the top center position of the frame 2 .

[0100] Install the motor 9 and the drive device.

[0101] The installation of the device is completed above. The use of the device under different working conditions is the same as that of Example 1.

[0102] Since the liquid 3 inside the frame 2 is limited, this embodiment reduces the influence of the liquid 3 on the rotation of the rotor 1 .

[0103] This embodiment can be placed on a flat position on land for use, and can also be hoisted in natural waters or placed in a caisson with a flat bottom for use.

[0104] Example 4.

[0105] In order to ensure that the rotor 1 is always suspended in the frame 2, on the basis of Example 4, a displacement sensor 14 is provided at the top limit sleeve 5, such as Figure 3The displacement sensor 14 detects the vertical movement of the shaft 4 in real time. When the movement is large, the liquid 3 is injected or discharged to ensure that the shaft 4 does not break away from the two limit sleeves 5 and does not touch the bottom of the frame 2. The method of use under normal circumstances is the same as that of Example 1.

Claims

1. A liquid-supported rotor energy storage device, characterized in that: The energy storage device comprises a frame (2), and a rotor (1) with a circular upper surface arranged inside the frame (2); the rotor (1) floats on the surface of a liquid (3); a slideway (7) is arranged on the upper part of the frame (2), which is higher than the upper surface of the rotor (1), parallel to the upper surface of the rotor (1) and passes through the center of the rotor (1); a motor (9) is arranged on the slideway (7) through a driver (10); limiting sleeves (5) are arranged at the center positions of the top and bottom of the frame (2); a shaft (4) is arranged at the center of the rotor (1), and the shaft (4) and two limiting sleeves (5) cooperate to limit the rotor (1) in the frame (2); Magnetic homopolar repulsion matrices are provided at both ends of the shaft rod (4) and the limiting sleeve (5) to eliminate friction between the two.

2. The energy storage device according to claim 1, characterized in that: The driving wheel of the motor (9) is a friction wheel (11) made of rubber, and the upper surface of the rotor (1) is rough.

3. A method for using a liquid-supported rotor energy storage device, based on the energy storage device according to claim 1 or 2, characterized in that: The method of use includes: Install a liquid-supported rotor energy storage device; In energy storage mode, When the rotor (1) is stationary, the motor (9) is started, and the driving wheel of the motor (9) is brought into contact with the edge of the upper surface of the rotor (1), so as to drive the rotor (1) to rotate; when the rotor (1) is rotating and the driving wheel of the motor (9) is separated from the upper surface of the rotor (1), the motor (9) is started, and r1=RPM*r / (RPM1+M) is calculated, wherein the speed of the driving wheel of the motor (9) is RPM, the radius is r, the current speed of the rotor (1) is RPM1, and the driving wheel of the motor (9) is placed on the upper surface of the rotor (1) at a position r1 away from the center of the rotor (1); During the energy storage process, the rotation speed RPM2 of the rotor (1) and the distance r2 between the driving wheel of the motor (9) and the center of the rotor (1) are detected in real time. When RPM*r= RPM2*r2, Δr1= r2-RPM*r / (RPM2+M) is calculated, and the driving wheel of the motor (9) is moved Δr1 toward the center of the rotor (1); When energy storage is terminated or the distance between the driving wheel of the motor (9) and the center of the rotor (1) is smaller than the diameter of the driving wheel, the driving wheel of the motor (9) is lifted; In output mode, When starting to generate electricity, the rotation speed RPM3 of the rotor (1) is obtained, r3=RPM*r / (RPM3-M) is calculated, and the driving wheel of the motor (9) is placed on the upper surface of the rotor (1) at a position r3 away from the center of the rotor (1), and the motor (9) drives the driving wheel to rotate through the rotor (1) to generate electricity; During the power generation process, the speed RPM4 of the rotor (1) and the distance r4 between the driving wheel of the motor (9) and the center of the rotor (1) are detected in real time. When RPM*r= RPM4*r4, the calculation is Δr2=RPM*r / (RPM4-M)-r4, move the driving wheel of the motor (9) toward the edge of the rotor (1) by Δr2; When the driving wheel of the motor (9) ends power generation or reaches the edge of the rotor (1), the driving wheel of the motor (9) is lifted; The value range of M is 5-200.

4. The method of use according to claim 3, characterized in that: In the energy storage device, the upper end of the shaft (4) is connected to a gearbox (6), and the output shaft of the gearbox (6) is installed with a power interface. The method of use further comprises: In the energy storage mode, the clutch of the gearbox (6) is engaged, and the external kinetic energy connects the gear (6-1) to drive the rotor (1) to rotate through the gearbox (6); In output mode, gear (6-1) serves as an interface to output mechanical energy.

5. The method of use according to claim 3, characterized in that: The installation of the liquid-supported rotor type energy storage device comprises: Place the rotor (1) into the frame (2), so that the bottom end of the shaft (4) of the rotor (1) is inserted into the limiting sleeve (5) at the bottom of the frame (2), and the bottom end of the shaft (4) is kept from contacting the bottom of the frame 2; The ring (2-5) passes through the shaft (4) to connect the connecting rod (2-2) together with the slideway (7) to the main body of the frame (2); Connect the fixing frame (2-1) to the connecting rod (2-2), and insert the upper end of the shaft rod (4) into the limiting sleeve (5) at the top center position of the frame (2); A motor (9) and a driving device are installed on the slideway (7).

6. The method of use according to claim 5, characterized in that: In the installation of the liquid-supported rotor-type energy storage device, firstly, the main body of the frame (2) is placed in water; After the motor (9) and the drive device are installed, the installed device is hung on the steel cable (12) through the connecting piece (2-3), and the steel cable (12) is fixed by a static object.

7. The method of use according to claim 5, characterized in that: In the installation of the liquid-supported rotor-type energy storage device, the frame (2) is first arranged into a barrel shape with a closed lower portion, and a discharge valve (2-4) is arranged at the bottom of the frame (2); the main body of the frame (2) is placed in a flat position, and the liquid (3) is injected into the closed lower portion of the frame (2).

8. The method of use according to claim 7, characterized in that: In the energy storage device, a displacement sensor (14) is provided at the top limit sleeve (5) to detect the vertical movement of the shaft (4) in real time. When the movement is relatively large, liquid (3) is injected or discharged to ensure that the shaft (4) will not separate from the two limit sleeves (5) and will not contact the bottom of the frame (2).

9. The method of use according to claim 6, characterized in that: The energy storage device floats in open water or an artificial pool.

10. The method of use according to claim 7 or 8, characterized in that: The device is placed on a flat ground position or in a caisson with a flat bottom surface.

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