A single-unit wind power energy storage device for a wind turbine

Abstract

The present invention relates to the technical field of wind power generation, and discloses a single-machine wind power energy storage device for a wind turbine, including a nacelle and a lifting drum, wherein a transmission gear for coaxially driving the impeller shaft to rotate is arranged on one side of the nacelle, and the lifting drum is connected to a mass block for energy storage through a suspension rope. The present invention balances the gravity of the mass block through an adjustment block, adjusts the counterweight in the energy release process, matches the current rotation speed of the impeller, and makes the process of the mass block accessing the impeller transmission and the switching process of energy release between the mass block and the adjustment block smooth through the cooperation of a ratchet gear, a stop spring and a stop plate, avoids affecting the rotation of the impeller, and makes the access process smooth, reduces mechanical shock, and reduces the descending speed of the mass block when the mass block's own gravity is greater than the counterweight currently required for the impeller to absorb wind energy, cooperates with the adjustment block to release energy twice to further extend the energy release time, and improves the efficiency of converting gravity energy release into electrical energy.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a single-unit wind power energy storage device for a wind turbine. Background Art

[0002] During the operation of wind turbines, energy storage devices are often used to store excess power when electricity is abundant, and then release the stored power when power generation is insufficient. Power energy storage devices are divided into mechanical energy storage, including pumped energy storage, compressed air energy storage, flywheel energy storage, etc.; electrochemical energy storage, including lithium battery energy storage, lead-acid battery energy storage, etc.; chemical energy storage, including thermal energy storage, hydrogen energy storage, etc.; electromagnetic energy storage, including superconducting energy storage, supercapacitor energy storage, etc. In the single-unit energy storage of wind turbines, single-unit gravity energy storage devices of wind turbines are gradually used to store electricity. The existing single-unit gravity energy storage device of a wind turbine includes a lifting mechanism for lifting a mass block. When the generated electricity is abundant, the excess electricity is used to drive the motor to rotate the drum, and the mass block is lifted from a low place to a high place in conjunction with the lifting rope. When releasing energy, the clutch on the drum and the motor connecting shaft disconnects the transmission, and the gear set between the drum and the rotating shaft of the fan impeller is connected through the clutch transmission. The brake mechanism of the drum releases the drum, and the mass block falls to drive the drum to rotate. The transmission drives the impeller shaft to rotate, accelerates the impeller rotation, and then drives the generator rotor of the cabin impeller to rotate to generate electricity.

[0003] However, during the use of traditional single-machine gravity energy storage devices for wind turbines, the impeller shaft needs to be braked first before the clutch can connect the stationary drum with the braked gear set to avoid excessive mechanical shock, resulting in kinetic energy loss of the impeller and affecting the response speed of the energy storage device when it is started. At the same time, after the mass block falls, the clutch needs to be disconnected in advance, and then the drum needs to be braked by the braking mechanism to avoid energy waste and mechanical impact on the impeller transmission system caused by driving the impeller to stop, resulting in kinetic energy loss of the mass block. In addition, in the process from the disconnection of the clutch to the activation of the braking mechanism, the free fall of the mass block also leads to the waste of the gravitational potential energy of the mass block. Summary of the invention

[0004] In view of the shortcomings of the existing single-unit wind power gravity energy storage device mentioned in the background technology during use, the present invention provides a single-unit wind power energy storage device for a wind turbine set, which has the advantages of soft start and improved gravity potential energy conversion efficiency, and solves the technical problems raised in the above background technology.

[0005] The present invention provides the following technical solution: a single-machine wind power energy storage device for a wind turbine, comprising a nacelle and a lifting drum, a transmission gear for coaxially driving an impeller shaft to rotate is arranged on one side of the nacelle, the lifting drum is connected to a mass block for energy storage through a suspension rope, a ratchet gear is arranged on one side of the bottom of the nacelle, a stop plate is rotatably connected to the inner side of the lifting drum, the stop plate is adapted to the ratchet gear, a stop spring for pushing the stop plate toward the ratchet gear is fixedly connected to one side of the stop plate, and the ratchet gear is limited to rotate in a unidirectional direction relative to the lifting drum;

[0006] An adjusting mechanism is provided at the bottom of the cabin, and the adjusting mechanism is used for switching the transmission object of the lifting drum, adjusting the mass of the lifting counterweight of the lifting drum, and adjusting the speed of the mass block during the energy release process, so that the counterweight of the lifting drum matches the current impeller speed, and cooperates with the stop plate, ratchet gear and stop spring to smoothly switch the transmission components under the rotation of the impeller, brake the lifting drum in a low-speed state, and synchronously make the lifting drum withdraw from the transmission connection with the ratchet gear.

[0007] Preferably, the adjustment mechanism comprises a support shaft, the support shaft is rotatably connected to the cabin via a bearing, one side of the support shaft is fixedly connected with an energy release gear for driving the transmission gear to rotate, the energy release gear is meshed with the transmission gear, one side of the lifting drum is fixedly sleeved with a second rotating shaft, and one side of the ratchet gear is fixedly connected with a first rotating shaft for driving the support shaft to rotate;

[0008] A lifting motor is fixedly installed on one side of the bottom of the cabin, and clutches are arranged between the first rotating shaft and the supporting shaft, and between the output shaft of the lifting motor and the second rotating shaft. The rotation direction of the lifting drum releasing the mass block is the same as the rotation direction of the ratchet gear driven by the one-way transmission of the lifting drum.

[0009] Preferably, the number of the stop plates cooperating with the corresponding ratchet gear is set to be several and they are evenly arranged on the outside of the ratchet gear.

[0010] Preferably, the adjustment mechanism also includes an adjustment gear and an adjustment drum, a speed sensor for detecting the rotation speed of the energy release gear is fixedly arranged on one side of the bottom of the cabin, the adjustment drum is connected to an adjustment block for balancing the partial gravity of the mass block through a suspension rope, and the number of the support shaft, the second rotating shaft and the ratchet gear are all set to two, and the two support shafts, the second rotating shaft and the ratchet gear correspond to the lifting drum and the adjustment drum respectively.

[0011] Preferably, the adjusting gear is fixedly connected to the corresponding supporting shaft, the adjusting reel is fixedly sleeved with the corresponding No. 2 rotating shaft, the number of the stop plates is set to be several and the several stop plates are evenly divided into two groups corresponding to two ratchet gears respectively, and the inner wall of the adjusting reel is rotatably connected to the corresponding stop plate.

[0012] Preferably, one side of the bottom of the cabin is rotatably connected to a No. 2 gear for driving the No. 2 rotating shaft to rotate, and one side of the bottom of the cabin is rotatably connected to a No. 3 gear;

[0013] A clutch is arranged between the second rotating shaft corresponding to the adjusting reel and the gear shaft of the second gear, one end of the shaft body of one of the two second rotating shafts is fixedly sleeved with the first gear, and the first gear and the second gear are both meshed with the third gear.

[0014] Preferably, the direction in which the adjusting drum releases the sling rope is opposite to the direction in which the lifting drum releases the sling rope, the adjusting drum can drive the ratchet gear to rotate unidirectionally in the rotation direction of the released sling rope, and the mass of the adjusting block is smaller than that of the mass block.

[0015] Preferably, a distance sensor for detecting the height of the mass block is fixedly provided at the bottom of the cabin, and a gearbox for adjusting the torque is fixedly provided at the top of one side in the cabin.

[0016] Preferably, the input end of the gearbox is drivingly connected to the impeller shaft, and a generator is fixedly arranged on the top of one side in the cabin.

[0017] Preferably, a brake mechanism for braking is provided on one side of the lifting drum and the adjusting drum.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention drives the lifting drum to rotate by lowering the mass block. When the wind energy absorbed by the impeller is insufficient, the energy storage device releases energy, and the lifting drum cooperates with the stop plate and the stop spring. After the rotation speed of the lifting drum reaches the rotation speed of the ratchet gear, the transmission drives the ratchet gear to rotate faster, thereby driving the impeller shaft to rotate faster, and converting the gravity energy released by the mass block and the wind energy of the impeller into electrical energy through the generator, so that the energy storage device can smoothly transmit the energy release transmission component to the impeller shaft transmission process when the impeller is in a rotating state, so as to avoid affecting the rotation of the impeller.

[0020] 2. The present invention balances the gravity of the mass block through the adjustment block. When the wind energy absorbed by the wind is insufficient but the rotation is close to full speed, the mass block is lowered and the adjustment block is driven to rise synchronously, thereby reducing the descending speed of the mass block and the released gravity energy, improving the matching degree of the energy release counterweight and the impeller speed, and converting the part of the mass that originally exceeds the mass required for power generation into the gravity potential energy of the adjustment block. While avoiding the waste of gravity energy release, the subsequent secondary energy release of the adjustment block further extends the duration of the energy release process, and the switching to the secondary energy release process is also smoothly connected to ensure the stability of the switching. At the same time, when the impeller speed is lower than the rated value, the kinetic energy of the mass block is partially converted into electrical energy converted by the generator by increasing the damping, and part of the kinetic energy of the mass block is recovered. In the recovery process, the lifting drum is braked at a low speed and synchronously disengaged from the ratchet gear transmission to reduce wear between components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the lifting drum of the present invention;

[0024] Figure 4 It is a schematic cross-sectional view of the structure of the ratchet gear of the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the structure of the stop plate of the present invention.

[0026] In the figure: 1. Cabin; 2. Mass block; 3. Adjustment block; 4. Transmission gear; 5. Energy release gear; 6. Adjustment gear; 7. Support shaft; 8. Distance sensor; 9. No. 1 rotating shaft; 10. Clutch; 11. Lifting drum; 12. No. 2 rotating shaft; 13. Lifting motor; 14. No. 1 gear; 15. Generator; 16. Speed ​​sensor; 17. Stop spring; 18. Stop plate; 19. Adjustment drum; 20. Ratchet gear; 21. Gearbox; 22. No. 2 gear; 23. No. 3 gear. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] For example, see Figure 1-Figure 5A single-machine wind power energy storage device for a wind turbine generator system includes a nacelle 1, a transmission gear 4 is arranged on one side of the nacelle 1, the transmission gear 4 is fixedly sleeved on the outer side of the impeller shaft, the transmission gear 4 is used to drive the impeller shaft to rotate, a support shaft 7 is rotatably connected to one side of the bottom of the nacelle 1 through a bearing, a release gear 5 is fixedly connected to one side of the support shaft 7 for driving the transmission gear 4 to rotate, the release gear 5 is meshed with the transmission gear 4, a lifting drum 11 is arranged on one side of the bottom of the nacelle 1, a lifting rope is arranged on the lifting drum 11, the lifting rope is preferably a steel rope, the lifting drum 11 is connected to a mass block 2 for energy storage through the lifting rope, the lifting drum 11 can rotate to retract and release the lifting rope to drive the mass block 2 to rise and fall, a second rotating shaft 12 is fixedly sleeved on one side of the lifting drum 11, the second rotating shaft 12 is used to drive the lifting drum 11 to rotate and lift the mass block 2, a ratchet gear 20 is arranged on one side of the bottom of the nacelle 1, and a first rotating shaft 9 is fixedly connected to one side of the ratchet gear 20 for driving the support shaft 7 to rotate.

[0029] A lifting motor 13 is fixedly arranged on one side of the bottom of the cabin 1, and a clutch 10 is arranged between the No. 1 rotating shaft 9 and the supporting shaft 7, and between the output shaft of the lifting motor 13 and the No. 2 rotating shaft 12, so that the supporting shaft 7 can be connected or disconnected with the No. 1 rotating shaft 9, and between the output shaft of the lifting motor 13 and the No. 2 rotating shaft 12, and the transmission connection object of the lifting drum 11 is switched. A plurality of stop plates 18 are rotatably connected to the inner side of the lifting drum 11, and the stop plates 18 are adapted to the ratchet gear 20, and the free ends of the stop plates 18 can be embedded in the adjacent teeth of the ratchet gear 20. The stop plate 18 is fixedly connected to one side of the stop plate 18 with a stop spring 17 for pushing the stop plate 18 toward the ratchet gear 20. The number of the stop plates 18 is set to be several and they are evenly spaced on the outside of the ratchet gear 20, so that the ratchet gear 20 can push the stop plate 18 away and rotate relative to the lifting drum 11 in the rated direction, so that the lifting drum 11 can drive the ratchet gear 20 to rotate in a unidirectional manner, and a braking mechanism for locking the lifting drum 11 is provided on one side of the lifting drum 11.

[0030] When the wind turbine generator system generates abundant power, the lifting motor 13 absorbs power from the grid, and the clutch 10 between the output shaft of the lifting motor 13 and the second rotating shaft 12 is switched to a linkage state, and the clutch 10 between the support shaft 7 and the first rotating shaft 9 remains in a separated state. The output shaft of the lifting motor 13 rotates to drive the second rotating shaft 12 to rotate, and the second rotating shaft 12 drives the lifting drum 11 to rotate, so that the lifting drum 11 rotates to lift the mass block 2. The mass block 2 can be set as a counterweight box filled with industrial construction waste or iron waste. The mass block 2 is lifted from a low place to a high place, and the electrical energy is converted into gravitational potential energy and stored. After the lifting is completed, the braking mechanism locks and locks the lifting drum 11, and the clutch 10 between the output shaft of the lifting motor 13 and the second rotating shaft 12 is switched back to a separated state.

[0031] When the impeller of the wind turbine unit receives less wind energy, the clutch 10 between the support shaft 7 and the No. 1 rotating shaft 9 is switched to a linkage state. At this time, the impeller of the wind turbine unit rotates under weak wind conditions, and the transmission gear 4 drives the energy release gear 5 to rotate, and the energy release gear 5 drives the support shaft 7 to rotate. The support shaft 7 drives the No. 1 rotating shaft 9 to rotate. The rotation direction of the lifting drum 11 to release the mass block 2 is the same as the rotation direction of the ratchet gear 20 driven by the unidirectional transmission of the lifting drum 11. The No. 1 rotating shaft 9 drives the ratchet gear 20 to push the stop plate 18 to rotate, so that the No. 1 rotating shaft 9 and the ratchet gear 20 rotate with an initial velocity consistent with the impeller speed. The brake mechanism releases the lifting drum 11, and the mass block 2 descends under the action of gravity.

[0032] The mass block 2 descends and drives the lifting drum 11 and the ratchet gear 20 to rotate in the same direction through the lifting rope. The lifting drum 11 accelerates until the rotation speed of the lifting drum 11 is consistent with the rotation speed of the ratchet gear 20. The lifting drum 11 continues to accelerate and rotates relative to the ratchet gear 20, so that the stop plate 18 is embedded between the teeth of the ratchet gear 20 under the push of the stop spring 17, so that the lifting drum 11 drives the ratchet gear 20 to rotate, thereby driving the transmission gear 4 to rotate, accelerating the rotation of the transmission gear 4, avoiding affecting the rotation of the impeller and reducing mechanical shock. When the mass block 2 descends to near the bottom, the braking mechanism stops the lifting drum 11 when the lifting drum 11 is connected to the transmission gear 4. While the lifting drum 11 reduces its rotation speed, the ratchet gear 20 disengages from the transmission of the lifting drum 11, thereby achieving transmission separation while braking the lifting drum 11 without affecting the rotation of the impeller.

[0033] For example 2, please refer to Figure 2-Figure 5 During the use of a traditional single-unit gravity energy storage device for a wind turbine, when the wind energy and mass block 2 release energy, if the mass block 2 descends to drive the impeller shaft to the rated maximum speed, and the wind energy causes the impeller to rotate at close to full power, the mass of the mass block 2 does not match the mass required to speed up the impeller shaft, and part of the gravitational potential energy of the mass block 2 is wasted, and the burden on the transmission system is increased.

[0034] On the basis of the first embodiment, a speed sensor 16 for detecting the speed of the energy-releasing gear 5 is fixedly provided on one side of the bottom of the cabin 1. The speed of the energy-releasing gear 5 is related to the transmission gear 4, so that the speed of the impeller is detected by judging the speed of the energy-releasing gear 5. An adjusting drum 19 is provided on one side of the bottom of the cabin 1. The adjusting drum 19 is connected to an adjusting block 3 for balancing part of the gravity of the mass block 2 through a suspension rope. The adjusting drum 19 can rotate to retract and release the suspension rope to drive the adjusting block 3 to rise and fall. The number of the supporting shaft 7, the first rotating shaft 9 and the ratchet gear 20 are all set to two. The two supporting shafts 7, the second rotating shaft 12 and the ratchet gear 20 correspond to the lifting drum 11 and the adjusting drum 19 respectively. A stop plate 18 corresponding to the ratchet gear 20 is rotatably provided on the inner side of the adjusting drum 19. The two One side of one of the support shafts 7 is fixedly connected with an adjusting gear 6 for driving the transmission gear 4 to rotate, and the adjusting gear 6 is meshed with the transmission gear 4. One side of the bottom of the cabin 1 is rotatably connected with a No. 2 gear 22 for driving the No. 2 rotating shaft 12 to rotate. One side of the bottom of the cabin 1 is rotatably connected with a No. 3 gear 23. One of the two No. 2 rotating shafts 12 is fixedly connected to the adjusting reel 19, and a clutch 10 is arranged between the No. 2 rotating shaft 12 corresponding to the adjusting reel 19 and the gear shaft of the No. 2 gear 22. One end of the shaft body of the other No. 2 rotating shaft 12 of the two No. 2 rotating shafts 12 is fixedly sleeved with a No. 1 gear 14, and the No. 1 gear 14 and the No. 2 gear 22 are both meshed with the No. 3 gear 23. A corresponding brake mechanism is arranged on one side of the adjusting reel 19.

[0035] Before the mass block 2 releases energy, the speed sensor 16 detects the speed of the energy release gear 5. When the speed of the energy release gear 5 is close to the full speed state, the clutch 10 corresponding to the transmission of the adjusting drum 19 and the No. 2 gear 22 is switched to a linkage state, and the clutch 10 corresponding to the adjusting drum 19 and the adjusting gear 6 remains in a clutch state. The lifting drum 11 is driven to rotate by the descending mass block 2, and the lifting drum 11 drives the corresponding No. 2 rotating shaft 12 to rotate, and the No. 2 rotating shaft 12 drives the No. 1 gear 14 to rotate, and the No. 1 gear 14 cooperates with the No. 3 gear 23 to drive the No. 2 gear 22 to rotate in the same direction, and the No. 2 gear 22 drives the corresponding No. 2 rotating shaft 12 to rotate, thereby driving the corresponding adjusting drum 19 and the lifting drum 11 to rotate in the same direction. The direction of releasing the suspension rope of the adjusting drum 19 is opposite to the direction of releasing the suspension rope of the lifting drum 11, and the adjusting drum 19 can unidirectionally drive the ratchet gear 20 to rotate in the direction of rotation of the released suspension rope, and the adjusting drum 19 lifts the adjusting block 3. The mass of the regulating block 3 is smaller than that of the mass block 2, thereby transferring the excess gravitational potential energy of the mass block 2 to the gravitational potential energy of the regulating block 3. At this time, the descending speed of the mass block 2 is smaller than that before balancing the gravitational potential energy, thereby extending the descending time of the mass block 2, improving the matching degree between the mass of the impeller shaft driven by the descending transmission of the mass block 2 and the current wind speed, avoiding excessive descending speed and waste of excess gravitational potential energy, and completing the descent of the mass block 2. At the same time, the clutch 10 corresponding to the support shaft 7 and the regulating drum 19 is switched to a linkage state, and the clutch 10 corresponding to the No. 2 gear 22 and the regulating drum 19 is switched back to a separated state. At this time, the ratchet gear 20 in the regulating drum 19 is in a rotating state, realizing the counterweight switching of the gravitational energy storage when the impeller is in a rotating state, and converting the gravitational potential energy of the regulating drum 19 into electrical energy when releasing the regulating drum 19, recovering the gravitational potential energy originally wasted, and further extending the duration of the gravitational potential energy release.

[0036] For example 3, please refer to Figure 1-Figure 5 On the basis of the second embodiment, a distance sensor 8 for detecting the height of the mass block 2 is fixedly arranged at the bottom of the cabin 1, a gearbox 21 for adjusting the torque is fixedly arranged at the top of one side of the cabin 1, and the input end of the gearbox 21 is transmission-connected to the impeller shaft, and a generator 15 is fixedly arranged at the top of one side of the cabin 1, and the output end of the gearbox 21 is transmission-connected to the input end of the generator 15.

[0037] When the impeller speed is not sufficient to generate electricity while the mass block 2 cooperates with the adjusting block 3 to balance the gravity, the distance sensor 8 detects that the mass block 2 has dropped to near the bottom. At this time, the torque of the gearbox 21 is increased, so that the torque transmitted to the lifting drum 11 is also increased, so that the mass block 2 drives the lifting drum 11 to reduce its speed, and the kinetic energy of the mass block 2 is reduced, so that the generator 15 absorbs part of the kinetic energy of the mass block 2 and recovers the kinetic energy of the mass block 2. The impeller speed is low, and the wind energy lost when the torque increases is less than the kinetic energy of the recovered mass block 2. Afterwards, the braking mechanism locks the lifting drum 11 when the speed of the lifting drum 11 is reduced, reducing the wear on the braking mechanism. At the same time, the lifting drum 11 and the ratchet gear 20 are separated at a low speed, reducing the wear of the ratchet gear 20 on the stop plate 18 and the stop spring 17.

[0038] The method of use (working principle) of the present invention is as follows:

[0039] When the wind energy absorbed by the impeller is insufficient, the energy storage device releases energy. When the impeller is running at a speed lower than but close to full speed, the corresponding clutch 10 between the lifting drum 11 and the energy release gear 5 is switched to a linkage state, and the clutch 10 between the regulating drum 19 and the second gear 22 is switched to a linkage state. The regulating block 3 balances part of the mass of the mass block 2, and the lifting drum 11 is driven to rotate by the mass block 2 through the suspension rope. When the rotation speed of the lifting drum 11 reaches the rotation speed of the ratchet gear 20, the lifting drum 11 continues to accelerate and cooperates with the stop plate 18 and the stop spring 17 to be connected to the ratchet gear 20. The transmission drives the impeller shaft to accelerate without affecting the rotation of the impeller, thereby improving the matching of the energy release counterweight and the impeller rotation speed. The duration of gravity energy release is prolonged, and the transmission is coordinated with the adjusting drum 19 and the corresponding ratchet gear 20, so that the impeller switches the counterweight for energy release while rotating and reduces mechanical shock. Then the adjusting block 3 releases energy, which further prolongs the duration of energy release and improves the overall gravity energy release conversion efficiency. When the impeller speed is lower than the rated value, the mass block 2 releases energy alone. When the mass block 2 is close to the bottom, the torque of the transmission is increased, so that the torque fed back to the lifting drum 11 is increased, the mass block 2 is decelerated, part of the kinetic energy of the mass block 2 is recovered, and the lifting drum 11 is synchronously braked and the lifting drum 11 and the ratchet gear 20 are separated at a low speed to reduce the wear of the transmission part.

Claims

1. A single-unit wind power energy storage device for a wind turbine, comprising a nacelle (1) and a lifting drum (11), wherein a transmission gear (4) for coaxially driving an impeller shaft to rotate is arranged on one side of the nacelle (1), and the lifting drum (11) is connected to a mass block (2) for energy storage via a suspension rope, characterized in that: A ratchet gear (20) is provided on one side of the bottom of the cabin (1); a stop plate (18) is rotatably connected to the inner side of the lifting drum (11); the stop plate (18) is adapted to the ratchet gear (20); a stop spring (17) is fixedly connected to one side of the stop plate (18) for pushing the stop plate (18) toward the ratchet gear (20), thereby limiting the rotation of the ratchet gear (20) in a unidirectional direction relative to the lifting drum (11); An adjusting mechanism is provided at the bottom of the cabin (1), and the adjusting mechanism is used to switch the transmission object of the lifting drum (11), adjust the mass of the lifting counterweight of the lifting drum (11), and adjust the speed of the mass block (2) during the energy release process, so that the counterweight of the lifting drum (11) matches the current impeller rotation speed, and cooperates with the stop plate (18), the ratchet gear (20) and the stop spring (17) to smoothly switch the transmission components under the rotation of the impeller, brake the lifting drum (11) in a low-speed state, and synchronously make the lifting drum (11) withdraw from the transmission connection with the ratchet gear (20); The adjustment mechanism comprises a support shaft (7), the support shaft (7) being rotatably connected to the cabin (1) via a bearing, a power release gear (5) being fixedly connected to one side of the support shaft (7) for driving the transmission gear (4) to rotate, the power release gear (5) being meshed with the transmission gear (4), a second rotating shaft (12) being fixedly sleeved to one side of the lifting drum (11), and a first rotating shaft (9) being fixedly connected to one side of the ratchet gear (20) for driving the support shaft (7) to rotate; A lifting motor (13) is fixedly arranged on one side of the bottom of the cabin (1), and a clutch (10) is arranged between the first rotating shaft (9) and the supporting shaft (7), and between the output shaft of the lifting motor (13) and the second rotating shaft (12); the rotation direction of the lifting drum (11) for releasing the mass block (2) is the same as the rotation direction of the ratchet gear (20) driven by the lifting drum (11) for one-way transmission; The regulating mechanism further comprises an regulating gear (6) and an regulating drum (19); a rotation speed sensor (16) for detecting the rotation speed of the energy-releasing gear (5) is fixedly arranged on one side of the bottom of the cabin (1); the regulating drum (19) is connected to an regulating block (3) for balancing a part of the gravity of the mass block (2) via a suspension rope; the number of the supporting shaft (7), the second rotating shaft (12) and the ratchet gear (20) is set to two, and the two supporting shafts (7), the second rotating shaft (12) and the ratchet gear (20) correspond to the lifting drum (11) and the regulating drum (19) respectively; the regulating gear (6) is meshed with the transmission gear (4); The adjusting gear (6) is fixedly connected to the corresponding supporting shaft (7), the adjusting reel (19) is fixedly sleeved to the corresponding second rotating shaft (12), the number of the stop plates (18) is set to be a plurality and the plurality of stop plates (18) are evenly divided into two groups corresponding to the two ratchet gears (20) respectively, and the inner wall of the adjusting reel (19) is rotatably connected to the corresponding stop plate (18); A second gear (22) for driving the second rotating shaft (12) to rotate is rotatably connected to one side of the bottom of the cabin (1), and a third gear (23) is rotatably connected to one side of the bottom of the cabin (1); A clutch (10) is provided between the second rotating shaft (12) corresponding to the regulating reel (19) and the gear shaft of the second gear (22); one end of the shaft of one of the two second rotating shafts (12) is fixedly sleeved with a first gear (14); and both the first gear (14) and the second gear (22) are meshed with a third gear (23); The direction in which the regulating drum (19) releases the sling rope is opposite to the direction in which the lifting drum (11) releases the sling rope. The regulating drum (19) can drive the ratchet gear (20) to rotate unidirectionally in the rotation direction of the released sling rope. The mass of the regulating block (3) is smaller than that of the mass block (2).

2. A single-unit wind power energy storage device for a wind turbine according to claim 1, characterized in that: The number of the stop plates (18) that cooperate with the corresponding ratchet gear (20) is set to be a plurality and are evenly spaced and arranged outside the ratchet gear (20).

3. A single-unit wind power energy storage device for a wind turbine according to claim 1, characterized in that: A distance sensor (8) for detecting the height of the mass block (2) is fixedly arranged at the bottom of the cabin (1), and a gearbox (21) for adjusting torque is fixedly arranged at the top of one side of the cabin (1).

4. A single-unit wind power energy storage device for a wind turbine according to claim 3, characterized in that: The input end of the gearbox (21) is drivingly connected to the impeller shaft, and a generator (15) is fixedly arranged on the top of one side of the nacelle (1).

5. The single-unit wind power energy storage device for a wind turbine according to claim 1, characterized in that: A brake mechanism for braking is provided on one side of the lifting drum (11) and the adjusting drum (19).

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