A gravity energy storage type wind power generation tower with segmented support mechanism

Abstract

The invention patent discloses a gravity energy storage wind power generation tower with a segmented support mechanism, including a wind turbine generator set, a tower, a tower frame, a foundation pedestal, a pit, a counterweight, a cable roller, a wire rope, and a lifting motor. The tower frame is placed on the foundation pedestal, the tower frame is placed on the upper end of the tower frame, and the wind turbine generator set is installed on the tower frame. The lifting motor is a generator motor, which consumes electric energy when driving the counterweight block to rise, and the generator motor converts the consumed electric energy into the gravitational potential energy of the counterweight block; when the counterweight block descends under the action of gravity, it drives the generator motor to generate electric energy, thereby realizing the storage and release of electric energy. When the counterweight block is lifted, a downward pulling force is applied to the upper end of the tower frame, so that the center of gravity of the tower frame moves downward. The structural frequency of the tower frame with the center of gravity moving downward will increase, and the lateral displacement amplitude of the tower top will decrease, which is beneficial to improving the wind resistance of the tower frame and allowing the wind turbine set to continue to operate at a higher wind speed.

Description

Technical Field

[0001] The invention relates to the field of wind turbine tower foundations, and in particular to a gravity energy storage type wind power generation tower provided with a segmented support mechanism. Background Art

[0002] like Figure 4 The variation of wind speed with height under different wind shear conditions is given. It can be seen that under high shear conditions, the wind speed increases significantly with the increase of height. That is to say, in areas with large wind shear, more wind energy can be captured by increasing the tower height, thereby more effectively increasing the power generation of the unit and improving the economic indicators of the unit. However, according to the conclusion of the paper "Dynamics and Stability Analysis of Large Wind Turbine Tower Structure" by Liu Yixiong et al., when the tower is taller, buckling is the main form of structural failure. The buckling strength will drop sharply with the increase of the ratio of shell diameter to thickness, and slightly decrease with the increase of the ratio of shell height to diameter. The most likely part of the tower to buckle instability is the bottom section, and buckling failure under axial pressure load is mainly likely to occur at the top flange connection of the bottom tower.

[0003] At present, when the height of the tower structure of wind turbine generator sets in my country reaches more than 100 meters, the increase in height leads to a decrease in the overall stiffness of the tower. Because the pure steel tube structure is too soft, the lateral displacement of the tower top is too large, and there is a risk of the impeller colliding with the tower, which will affect the power generation of the wind turbine structure. For example, when the radius of the bottom section of the tower is 2.5m, the wind turbine on the top of the tower weighs 500 tons, the top diameter of the tower is 4.4 meters, the tower is 162.5 meters high, and the elastic modulus of the steel used in the tower is 2.1×10 11 pa, Poisson's ratio is 0.3, and steel density is 7800kg / m 3 , when the top of the tower is subjected to loads in three directions of Fx = 1000 tons, Fy = 1000 tons, and Fz = -1000 tons. Using the finite element analysis software ABAQUS simulation calculation, it can be seen that the lateral displacement of the top of the tower structure will reach 5.01 meters, the lateral displacement of the top of the tower is too large, and the tower's own frequency is 0.108Hz. This ultra-flexible tower has high requirements for the wind frequency distribution of the wind farm and the control of the wind turbine. When the wind turbine runs near the resonance area, the control system needs to quickly cross the resonance area, and the randomness of the wind speed poses a great challenge to the control of the wind turbine.

[0004] In addition to being subject to wind, earthquake and wave loads, the wind turbine itself is also in motion. During the operation of the wind turbine, turbulence and gust disturbances, wake, wind shear, yaw rotation, tower shadow effect, etc. will cause tower vibration. When the natural frequency of the wind turbine tower coincides with the harmonic frequency of environmental loads or rotor rotation, resonance will occur. Large vibrations will reduce the performance of the wind turbine, causing shutdown and reducing power generation efficiency. To avoid resonance, during the design process, such as Figure 7 , the tower fundamental frequency tends to be far away from the impeller rotation frequency (1f), the blade passing frequency (3f) and the main environmental load frequency. The design principle of traditional rigid towers is that in order to avoid resonance, it should be in accordance with the national standard GB / T19072-2011 to ensure that the tower's natural frequency under operating conditions is between 10% of the rotor rotation frequency and less than 10% of the blade passing frequency. Thirdly, increasing the tower height (resulting in a decrease in tower stiffness) causes the first-order natural frequency of the tower to decrease and intersect with the first-order frequency of the unit's wind rotor rotation, causing the tower to resonate.

[0005] Therefore, in the design of wind turbine towers, users in this field expect to increase the height of the tower to increase the power generation of the unit, but at the same time avoid increasing the cross-sectional size and reducing costs. It also needs to have sufficient rigidity to avoid excessive lateral deviation of the tower top that affects safety, and meet the wind turbine's requirement that the first-order natural frequency of the tower's overall structure is between the first-order frequency and the third-order frequency of the wind rotor speed. The contradictions in design principles pose a huge challenge to those skilled in the art. Summary of the invention

[0006] In view of the above problems, an object of the present invention is to provide a tower that can adjust the structural frequency of a wind turbine tower according to changes in wind force and reduce the lateral displacement amplitude of the tower top.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a gravity energy storage type wind power generation tower, including a wind turbine generator set, a tower, a tower, a foundation pedestal, a pit, a counterweight, a cable drum, a steel wire rope, a lifting motor, and a control device. The tower is placed on the foundation pedestal, the tower is placed on the upper end of the tower, and the wind turbine generator set is installed on the tower. A pit is centrally arranged below the tower, and a plurality of steel wire ropes that are retracted and released by a cable drum are centrally arranged on the upper end of the tower. N counterweights are placed from top to bottom in the pit, and the counterweights are constructed with a hollow channel running through the upper and lower ends. The cable drum can be driven to rotate by the lifting motor, one end of the steel wire rope is wound around the surface of the cable drum, and the other end is connected to a sling, and the sling has at least three hooks that can expand radially from the center of the hollow channel, and the inner circumference of the hollow channel is provided with a hook that can The annular structure hooked by the expanded hook, the cable drum is rotatably fixed on the drum seat, the lifting motor is configured as a generator motor, at least three positioning shafts surrounding the central axis of the tower are provided on the inner side of the tower, the positioning shafts are connected as a whole by the annular structure, so that an annular channel is formed between all the positioning shafts, and the positioning shafts are suspended in the tower by multiple anchor cables, so that the counterweight can be lifted and lowered through the annular channel, each positioning shaft has multiple convex rings arranged equidistantly from bottom to top at the same interval, and a rotatable sleeve is sleeved on the outer periphery of the positioning shaft section on the upper side of each convex ring, and multiple sleeves on each layer of the multiple positioning shafts have support plates and driven gears fixed on their outer peripheries at the same height and parallel to the bottom surface of the counterweight, and the driven gears of the sleeves on the same layer are driven by the same rotating mechanism, so that the support plate can be rotated to overlap or move away from the projection surface of the bottom surface of the counterweight;

[0008] The wind turbine generator set controls the generator motor and the rotating mechanism through the transformer and rectifier circuit, the cable line, and the relay switch group. The wind turbine generator set and the generator motor are connected to the booster station through the collector line.

[0009] The control device signals are connected to the relay switch group, the sensor and the monitor, the sensor includes an accelerometer for measuring the oscillation value of the wind turbine generator set, a strain gauge and an anemometer for measuring the wind speed, the monitor is used to monitor the state and position of the counterweight block suspended by the hanger, and the control device compares the output voltage of the sensor with the reference voltage;

[0010] When the output voltage is greater than the reference voltage, the generator motor is powered to repeat the following actions from top to bottom: the topmost counterweight in the pit is lifted to a set height, and then the adjacent support plate below the set height is rotated to coincide with the projection surface of the bottom surface of the counterweight, and then the counterweight is placed on the support plate;

[0011] When the output voltage is less than the reference voltage, the following actions are repeated one by one from bottom to top: the counterweight block lifted to the set height is suspended by the sling, the support plate under the counterweight block is rotated until it does not coincide with the projection surface of the bottom surface of the counterweight block, so that the counterweight block pulls the sling down into the pit, and the gravitational potential energy of the counterweight block is converted into electrical energy.

[0012] Advantageously, one of the functions of the device is that the counterweight block of the device has a hollow channel, so the wire rope can pass through the counterweight block one by one from top to bottom to lift the counterweight block below. After the counterweight block is lifted above the support plate, the support plate is rotated to place the counterweight block on the support plate. The weight applies a downward pulling force to different parts of the tower through the anchor cable, so that the tower is evenly stressed and the center of gravity moves downward. The structural frequency of the tower with the center of gravity moved downward will increase, and the lateral displacement amplitude of the tower top will decrease, which is beneficial to improve the wind resistance of the tower and enable the wind turbine to continue to operate at higher wind speeds.

[0013] The second function of this device: This lifting motor is a generator motor. The generator motor consumes electrical energy when driving the counterweight block to rise, and the generator motor converts the consumed electrical energy into the gravitational potential energy of the counterweight block; when the counterweight block descends under the action of gravity, the generator motor generates electrical energy, and the gravitational potential energy of the counterweight block is converted into electrical energy through the generator motor, thereby realizing the storage and release of electrical energy.

[0014] The third function of this device: This device has multiple counterweights and sensors. The sensors can lift a corresponding number of counterweights according to the impact of different wind speeds on wind turbines and towers, obtain sufficient structural frequency, and reduce the lateral displacement of the tower top sufficiently.

[0015] The fourth function of this device: a pit is set under the tower of this device to increase the conversion distance of gravitational potential energy, thereby increasing the energy storage capacity. Wind turbines are often set up in the northwest region, which lacks water and has low temperatures in winter. It is easier to store gravitational potential energy when necessary by using counterweights.

[0016] The fifth function of this device: the support plate can rotate to avoid the path of the counterweight block rising and falling, and can also rotate to support the counterweight block into the tower. Therefore, this device only needs one generator motor. With the cooperation of the support plate, multiple counterweight blocks can be lifted from the pit to the tower in succession, and then multiple counterweight blocks can be lifted from the tower into the pit, so as to realize multiple uses of one machine, reduce the investment in wind power towers, reduce the complexity of equipment, and reduce maintenance.

[0017] Preferably, a fixed pulley is centrally arranged at the upper end of the tower, one end of the steel wire rope is wound around the surface of the cable drum, and the other end is connected to a sling connected to the counterweight after passing around the fixed pulley, and the cable drum and the lifting motor are arranged on the ground.

[0018] Preferably, the rotating mechanism comprises a chain and a driving gear, the driven gears of equal height on the positioning shaft are fitted with the same circle of chain, and the driving gear is driven by a stepping motor to transmit the chain.

[0019] Advantageously, the above structure is conducive to setting the lifting motor with high fault rate on the ground for easy maintenance. At the same time, the support plate can be driven synchronously, the movement is unified, the chain transmission method is highly reliable and easy to maintain. At the same time, after the wire rope lifts the counterweight block to the support plate, the wire rope can be loosened to avoid wear of the wire rope and the pulley under continuous stress, thereby reducing its service life.

[0020] Preferably, the annular structure is located at the bottom of the positioning shaft, and an elastic energy absorbing structure is provided between the annular structure and the support at the bottom of the tower.

[0021] Preferably, guide wheels are evenly arranged on the periphery of the counterweight block, and vertical guide rails are also arranged between adjacent positioning shafts, and the guide wheels are rollingly connected to the guide rails.

[0022] Advantageously, the above structure helps to make the counterweight block more stable when lifting and lowering, and reduces the amplitude of the deflection.

[0023] Preferably, an elastic energy absorbing structure is provided on one side of the counterweight block facing the other.

[0024] Advantageously, the above structure helps to reduce the vibration of the counterweight after it approaches.

[0025] Preferably, the counterweight block has a cavity, and the cavity is filled with any combination of sand, stone, soil and water.

[0026] Advantageously, the above structure helps to solve the problem of water shortage in the desert and the inability to store water and gravitational potential energy.

[0027] Compared with the prior art, the beneficial effects and advantages of the present invention are as follows: on the basis of the existing wind turbine tower, the present invention adds a counterweight block at the bottom of the tower, and the counterweight block is connected to the cable drum after passing through the top of the wind turbine tower through a steel wire rope. After the counterweight block is lifted and placed on the support plate, on the one hand, the center of gravity of the overall structure of the tower can be lowered, the tower frequency, i.e., stiffness, and the anti-overturning ability and overall stability of the tower structure can be improved; secondly, the surplus wind energy can be accumulated and stored to reduce energy loss; thirdly, the energy storage device can be used for other types of towers, with few restrictions on tower types and usage conditions, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention;

[0029] Figure 2 This is the frequency calculation diagram of the tower when the counterweight is not lifted;

[0030] Figure 3 This is the frequency calculation diagram of the tower when lifting the counterweight;

[0031] Figure 4 The wind speed changes at different heights under different wind shears;

[0032] Figure 5 This is a schematic diagram of the Campbell diagram-flexible tower frequency. The first-order frequency at the rated speed of the wind rotor is called 1P, and the third-order frequency is 3P;

[0033] Figure 6 This is a control principle block diagram of Example 1;

[0034] Figure 7 for Figure 1 A magnified view of the tower base. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following further describes how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example 1

[0039] like Figure 1As shown, the tower of this embodiment includes a wind turbine generator set 100 at the top, a wind turbine tower 1, a tower 40, a foundation pedestal 13, a pit 50, a counterweight 7, a cable drum 6, a steel wire rope 3, and a lifting motor. The tower 40 is a conventional truss, and the lower end of the truss 40 is fixed on the foundation pedestal 13. A plurality of pile foundations 14 are arranged under the foundation pedestal 13, and the pile foundations 14 are embedded in the underground soil layer. In order to improve the stability of the truss below the tower 1, a pit 50 is arranged in the center below the tower 40, and a plurality of steel wire ropes 3 are arranged in the center of the upper end of the tower 40 to be retracted and released by a cable drum 6, and n counterweights 7 are stacked in layers from top to bottom in the pit 50. The counterweight block 7 is constructed with a hollow channel that passes through the upper and lower end surfaces. The cable drum 6 can be driven to rotate by a lifting motor, and the lifting motor is set as a generator motor. One end of the wire rope 3 is wound around the surface of the cable drum 6, and the other end of the wire rope 3 is connected to the sling 9. The sling 9 has at least three hooks 91 that can expand radially from the center of the hollow channel. The inner circumference of the hollow channel of each counterweight block 7 is provided with a lifting ring that can be hooked by the expandable hook 91. The cable drum 6 is rotatably fixed on the drum seat, and the drum seat can be arranged on the upper part of the tower 40, or it can be arranged on the upper part of the tower 40. Arranged on the ground, when arranged on the ground, a fixed pulley block is arranged at the upper end of the tower 40, and the fixed pulley block includes a fixed pulley 2a centrally arranged at the upper end of the tower 40 and a peripheral fixed pulley 2b arranged at the upper end of the tower 40. The steel wire rope 3 connected to the counterweight block 7 is wound around the fixed pulley block and then wound on the surface of the cable drum 6. Guide wheels are also evenly arranged on the outer periphery of the counterweight block 7. A plurality of vertical guide rails are evenly arranged around the outer periphery of the pit 50 in the tower 40, and each guide wheel is connected to the guide rail in a rolling manner, so that the guide rail limits the horizontal displacement amplitude of the counterweight block 7 when the counterweight block 7 is raised or lowered. The opposite side of the above-mentioned counterweight block 7 is provided with an elastic energy absorption structure, such as a spring, which can reduce the vibration of the counterweight blocks 7 after they are close to each other. The counterweight block 7 also has a cavity, and the cavity is filled with any combination of sand, stone, soil, and water, depending on the natural environmental conditions of the area where the tower 40 is installed.

[0040] At least three positioning shafts 10 are arranged on the inner side of the tower 40 around the central axis of the tower 40. The positioning shafts 10 are separated from the above-mentioned guide rails and connected as a whole by the annular structure 5, so that an annular channel is formed between all the positioning shafts 10, and each positioning shaft 10 is suspended in the tower 40 by a plurality of anchor cables 18. On the one hand, the counterweight 7 can be lifted and lowered through the annular channel, and on the other hand, the annular channel can uniformly apply tension to different parts of the tower 40 through the anchor cables 18. Each positioning shaft 10 is equidistantly arranged with a plurality of convex rings 11 at the same interval from bottom to top, and the upper side of each convex ring 11 has a fixed A rotatable sleeve is sleeved on the outer periphery of the positioning shaft segment. The multiple sleeves on each layer of the multiple positioning shafts 10 have support plates 12 and driven gears 16 fixed on their outer peripheries at the same height and parallel to the bottom surface of the counterweight block. The driven gears of the sleeves on the same layer are driven by the same rotating mechanism, so that the support plates 12 used at the same height can rotate synchronously to overlap or move away from the projection surface of the bottom surface of the counterweight block 7; the rotating mechanism includes a chain 17 and a driving gear. The driven gears 16 of the same height on the positioning shaft 10 are fitted with the same circle of chain 17, and the driving gear is driven by a stepping motor 30 for transmitting the chain.

[0041] The wind turbine generator set 100 controls the generator motor and the rotating mechanism through the transformer and rectifier circuit, the cable, and the relay switch group. The wind turbine generator set 100 and the generator motor are connected to the booster station through the collector line. A control device 70 is also provided in the tower. The control device 70 is connected to the relay switch group 80, the sensor 60 and the monitor 20 by signal. The sensor 60 includes an accelerometer and a strain gauge for measuring the oscillation value of the wind turbine generator set, and an anemometer for measuring the wind speed. The monitor is used to monitor the state and position of the counterweight block 7 suspended by the hanger 9. The control device 60 compares the output voltage of the sensor 60 with the reference voltage. When the output voltage is greater than the reference voltage, the relay switch group 90 is controlled to energize the generator motor, and the generator motor drives the hanger 9 to repeat the following actions one by one from top to bottom:

[0042] The topmost counterweight block 7 in the pit is lifted to a set height, and then the adjacent support plate 12 below the set height is rotated to coincide with the projection surface of the bottom surface of the counterweight block 7, and then the hoist 9 places the counterweight block 7 on the support plate 12;

[0043] When the output voltage is less than the reference voltage, the generator motor drives the sling 9 to repeat the following actions from bottom to top: the counterweight block 7 lifted to a set height is suspended by the sling 9, the support plate 12 below the counterweight block 7 is rotated until it does not overlap with the projection surface of the bottom surface of the counterweight block 7, so that the counterweight block 6 pulls the sling 9 down into the pit 50, and the gravitational potential energy of the counterweight block 7 is converted into electrical energy.

[0044] See Figure 2-Figure 3The design scheme of the wind turbine tower is as follows: the lower foundation is 15×15m, and the tower is 100 meters high. The columnar steel pipe used for the tower is 800mm in diameter and 25mm thick. The horizontal and inclined support steel pipes are 100mm to 250mm in diameter and 15mm to 20mm thick. Load: Fx = 1000 tons, Fy = 1000 tons, Fz = -1000 tons, and the wind turbine weighs 500 tons. The pit is 20 meters deep, with an area of ​​50 square meters and a volume of 1000 cubic meters. When multiple counterweights are stacked from bottom to top in the pit and multiple counterweights are not lifted, the frequency of the tower is 0.203. If the counterweights in the pit are lifted to a certain height of the tower, for example, a 50-ton counterweight is lifted and placed at a height of 80 meters, then a 100-ton counterweight is lifted and placed at a height of 60 meters, then a 150-ton counterweight is lifted and placed at a height of 40 meters, and finally a 200-ton counterweight is lifted and placed at a height of 20 meters, the frequency of the tower is converted to 0.215. After the frequency of the tower is increased, it can withstand a higher wind turbine speed and generate electricity at a higher wind speed. The height to which each of the above-mentioned counterweights is lifted does not affect the frequency of the tower. As long as the counterweight is lifted, the frequency of the tower can be changed. The lifting height only affects the amount of stored gravitational potential energy. However, in principle, after multiple counterweights are lifted to a certain height, the overall center of gravity of the counterweights should be close to the lower part of the tower. Therefore, the weight of the multiple counterweights in the pit decreases step by step from bottom to top, and the overweight counterweights should not be lifted too high. For this reason, in practice, in order to solve the center of gravity problem and energy storage problem, the pit can be dug deeper so that the counterweight can be lifted to a sufficient height and the center of gravity of multiple counterweights can be close to the bottom of the tower. In this way, there is no need to consider the need to lift the counterweight to a height relative to the ground in this example.

[0045] The counterweight block is filled with sand and gravel, 1.5 tons per cubic meter. A 200-ton counterweight block is equivalent to a solid rectangular block of 6 meters long, 6 meters wide and 4 meters high, which can be accommodated in the pit of this embodiment. In practice, the solid rectangular block should be constructed with a hollow channel running through the upper and lower end faces.

[0046] During operation, when the wind force increases to a value greater than the value that the wind turbine tower can withstand to resist the wind force, the lifting motor drives the cable drum to lift the counterweight step by step, thereby increasing the downward pulling force of the counterweight on the wind turbine tower, so that the center of gravity of the tower structure moves downward, and the stiffness of the wind turbine tower structure is increased to resist the wind force. At the same time, the electrical energy is stored as gravitational potential energy through the lifting and lowering of the counterweight. When the wind force decreases to a value less than the stiffness value required for the wind turbine tower to resist the wind force, the counterweight is lowered step by step, and the cable drum drives the generator motor to generate electricity, thereby converting the gravitational potential energy of the counterweight into electrical energy.

[0047] The counterweight block of the device has a hollow passage, so only a few steel wire ropes are used to pass through the hollow passage one by one from top to bottom to lift the counterweight blocks below without interfering with each other.

[0048] The device has multiple counterweights, sensors, and monitors. The sensors can lift the corresponding number of counterweights according to the impact of different wind speeds on wind turbines and towers, obtain sufficient structural frequency, and reduce the lateral displacement of the tower top. The monitor can monitor whether the counterweight is lifted by the hoist, to what position after lifting, at which height the support plate needs to be driven to extend, and whether the support plate is extended to a safe position.

[0049] A pit is set under the tower of the device to increase the conversion distance of gravitational potential energy, thereby increasing the energy storage capacity. Wind turbines are often set up in the northwest region, which lacks water and has low temperatures in winter. It is easier to store gravitational potential energy when necessary by using counterweights.

Claims

1. A gravity energy storage wind power generation tower with a segmented support mechanism, comprising a wind turbine generator set, a tower, a tower, a foundation pedestal, a pit, a counterweight, a cable drum, a wire rope, a lifting motor, and a control device. The tower is placed on the foundation pedestal, the tower is placed on the upper end of the tower, and the wind turbine generator set is installed on the tower, characterized in that: A pit is arranged at the center below the tower, and a plurality of steel wire ropes which are retracted and released by a cable drum are arranged at the center of the upper end of the tower. N counterweight blocks are placed from top to bottom in the pit, and the counterweight blocks are constructed with a hollow channel which passes through the upper and lower ends. The cable drum can be driven to rotate by a lifting motor, and one end of the steel wire rope is wound around the surface of the cable drum, and the other end is connected to a sling, and the sling has at least three hooks which can expand radially from the center of the hollow channel, and a lifting ring which can be hooked by the expandable hook is arranged on the inner periphery of the hollow channel. The cable drum is rotatably fixed on a drum seat, and the lifting motor is arranged as a generator motor. At least three positioning shafts which surround the central axis of the tower are arranged on the inner side of the tower, and the positioning shafts are connected as a whole by an annular structure so that all An annular channel is formed between the positioning shafts, and the positioning shafts are suspended in the tower by multiple anchor cables, so that the counterweight can be lifted and lowered through the annular channel. Each positioning shaft has multiple convex rings arranged equidistantly from bottom to top at the same interval, and a rotatable sleeve is sleeved on the outer periphery of the positioning shaft section on the upper side of each convex ring. The multiple sleeves on each layer of the multiple positioning shafts have support plates and driven gears of equal height and parallel to the bottom surface of the counterweight fixed on their outer peripheries, and the driven gears of the sleeves on the same layer are driven by the same rotating mechanism, so that the support plate can be rotated to overlap with or away from the projection surface of the bottom surface of the counterweight; the rotating mechanism includes a chain and a driving gear, and the driven gears of equal height on the positioning shaft are fitted with the same circle of chain, and the driving gear is driven by a stepping motor to transmit the chain; The wind turbine generator set controls the generator motor and the rotating mechanism through the transformer and rectifier circuit, the cable, and the relay switch group. The wind turbine generator set and the generator motor are connected to the booster station through the collector line; the control device signal connects the relay switch group, the sensor and the monitor. The sensor includes an accelerometer for measuring the oscillation value of the wind turbine generator set, a strain gauge and an anemometer for measuring the wind speed. The monitor is used to monitor the state and position of the counterweight block suspended by the hanger. The control device compares the output voltage of the sensor with the reference voltage. When the output voltage is greater than the reference voltage, the generator motor is powered to repeat the following actions from top to bottom: the topmost counterweight in the pit is lifted to a set height, and then the adjacent support plate below the set height is rotated to coincide with the projection surface of the bottom surface of the counterweight, and then the counterweight is placed on the support plate; When the output voltage is less than the reference voltage, the following actions are repeated one by one from bottom to top: the counterweight block lifted to the set height is suspended by the sling, the support plate under the counterweight block is rotated until it does not coincide with the projection surface of the bottom surface of the counterweight block, so that the counterweight block pulls the sling down into the pit, and the gravitational potential energy of the counterweight block is converted into electrical energy.

2. The gravity energy storage wind power generation tower with a segmented support mechanism according to claim 1, characterized in that: A fixed pulley is centrally arranged at the upper end of the tower, one end of the steel wire rope is wound around the surface of the cable drum, and the other end is connected to the sling connected to the counterweight after passing around the fixed pulley, and the cable drum and the lifting motor are arranged on the ground.

3. The gravity energy storage wind power generation tower with a segmented support mechanism according to claim 1, characterized in that: The annular structure is located at the bottom of the positioning shaft, and an elastic energy absorbing structure is provided between the annular structure and the support at the bottom of the tower.

4. The gravity energy storage type wind power generation tower with a segmented support mechanism according to any one of claims 1 to 3, characterized in that: Guide wheels are evenly arranged on the periphery of the counterweight block, and vertical guide rails are also arranged between adjacent positioning shafts, and the guide wheels are rollingly connected to the guide rails.

5. The gravity energy storage wind power generation tower with a segmented support mechanism according to claim 4, characterized in that: An elastic energy absorbing structure is arranged on one side of the counterweight block facing the other side.

6. The gravity energy storage wind power generation tower with a segmented support mechanism according to claim 5, characterized in that: The counterweight block has a cavity, and the cavity is filled with any combination of sand, stone, soil and water.

Images