Compressed air energy storage wind power generation system

Abstract

The present invention relates to the technical field of wind power generation and water pumping, and discloses a compressed air energy storage type wind power generation system, comprising a coupling drive component, a wind power generation component, a conversion component and an air compressor component. When there is no need for water pumping, the wind power generation component can generate electricity to supply power to the air compressor component, and the compressed high-pressure air is stored in an air storage tank for standby. When water pumping is required and the wind speed is normal, the wind power generation component can directly generate electricity for use by the water pumping equipment. When water pumping is required but the wind speed is too low or there is no wind, the coupling drive component can be used to drive the generator to generate electricity to supply power to the water pumping equipment, thereby improving the level of water supply security. The coupling drive component is driven by the principle of high-pressure air and buoyancy coupling, and can operate normally under high-cold climate conditions, solving the problems of short working life, high maintenance cost, and environmental pollution after abandonment of battery energy storage in high-cold climate conditions. It also has the characteristics of low cost, large capacity, and transferability.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation and water pumping, and in particular to a compressed air energy storage type wind power generation system. Background Art

[0002] Currently, small-scale wind power generation and water pumping systems are gradually being used in remote agricultural and pastoral areas to replace manual water extraction. These wind power generation and water pumping systems are available in two forms: energy storage and non-energy storage. The power supply component of the non-energy storage water pumping system is a conventional wind power generation system, which converts wind energy into electrical energy and transmits the generated electrical energy to the water pumping equipment, thereby driving the water pumping equipment to complete the water pumping operation. This non-energy storage water pumping system is affected by the intermittent and fluctuating nature of wind energy. It often encounters situations where the wind speed is too low or no wind when water pumping is required, or when the wind speed is too high when water pumping is not required, requiring shutdown. This leads to a low water supply security level. The energy storage water pumping system is based on the non-energy storage water pumping system and adds an energy storage component. When water pumping is not required, the energy storage component stores the electrical energy converted by the power supply component for backup use. When the wind speed is too low or no wind, the energy storage component temporarily supplies power to the water pumping equipment to complete the water pumping operation, effectively improving the water supply security level.

[0003] The energy storage components in existing energy storage water pumping systems are typically battery packs. Due to the short service life of batteries in high-altitude and cold climates, high maintenance costs, and the large amount of acid and lead produced after disposal, which can cause serious environmental pollution, existing energy storage water pumping systems are not suitable for use in high-altitude and cold climates. In recent years, with the advancement of science and technology, the development of new energy technologies has gradually begun to focus on the research of energy storage technology, and a variety of other energy storage methods have also emerged, such as gravity energy storage, flywheel energy storage, supercapacitor energy storage, superconducting energy storage, and hydrogen energy storage. However, based on the actual application environment in agricultural and pastoral areas in remote and high-altitude areas, these energy storage methods cannot simultaneously meet the requirements of low cost, large capacity, transferability, and strong environmental adaptability. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a compressed air energy storage wind power generation system. When water lifting operations are not required, wind power generation can be used to power the motor, drive the air compressor to operate, and input compressed air into the air tank for energy storage; when water lifting operations are required but the wind speed is too low, the high-pressure gas output by the air tank can be coupled with buoyancy, and the generator can be driven by the coupling drive component to generate electricity to power the water lifting equipment, which can effectively improve the level of water supply security. Under the premise of being suitable for use in high-altitude and remote areas, it has the advantages of low cost, large capacity, and transferability.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A compressed air energy storage type wind power generation system includes a coupled drive assembly, wherein the coupled drive assembly includes an air storage tank and a liquid tank, wherein a crankshaft and a plurality of drive units are arranged in the liquid tank;

[0007] The driving unit includes a cylinder, a piston plate, and a guide rod. The cylinder includes a cylinder body, a bottom plate, a sleeve and a connecting rod. The cylinder body is a hollow cylindrical structure. The bottom plate is fixedly connected to one end of the cylinder body, and one end of the connecting rod is fixedly connected to the other end of the cylinder body. The sleeve is coaxial with the cylinder body, one end of the sleeve is fixedly connected to the bottom plate, and the other end of the sleeve extends to the outside of the other end of the cylinder body. A through hole is provided on the piston plate, and the piston plate is arranged in the cylinder body. The outer periphery of the piston plate is slidably adapted to the inner wall of the cylinder body, and the through hole is slidably adapted to the sleeve. A limiting platform is formed at one end of the sleeve close to the bottom plate, and a limiting portion is formed at one end of the cylinder body away from the bottom plate. The limiting platform and the limiting portion are respectively used to limit the two sides of the piston plate, and the two ends of the guide rod are respectively added inwardly along the axial direction. The air intake channel and the exhaust channel are provided, and a plurality of air intake holes and exhaust holes are processed on the guide rod along the radial direction, the air intake holes are connected with the air intake channel, and the exhaust holes are connected with the exhaust channel, the guide rod is arranged in the sleeve and movably passes through the bottom plate, the guide rod is slidably adapted to the sleeve, and a plurality of communicating holes are processed in the radial direction of the limit platform, and the air intake holes and the exhaust holes are adapted to the communicating holes, the guide rod is vertically arranged, and one end of the guide rod close to the air intake channel passes through the bottom of the liquid tank and is fixedly connected to the liquid tank, the air intake channel is connected with the air storage tank, and the driving unit can use the driving principle of compressed air and buoyancy coupling to change the discharge volume of the cylinder by inflating and exhausting the cylinder, and then drive the cylinder to perform reciprocating lifting and lowering motion through the change of buoyancy of the cylinder;

[0008] The crankshaft is arranged horizontally, and both ends of the crankshaft are rotatably connected to the liquid tank. The ends of several connecting rods away from the cylinder body are rotatably connected to several crank pins on the crankshaft. Since several of the cylinders perform reciprocating lifting motions, the crankshaft can be further driven to rotate.

[0009] Furthermore, the driving unit also includes a sealing sleeve and a spring. The sealing sleeve is slidably mounted on the guide rod, the sealing sleeve is adapted to the air inlet, one end of the sealing sleeve is adapted to the end of the bottom plate away from the sleeve, one end of the spring is fixedly connected to the other end of the sealing sleeve, and the other end of the spring is fixedly connected to the bottom of the liquid tank. The sealing sleeve and the spring can be used to realize passive opening and closing control of the air inlet.

[0010] Furthermore, it also includes a wind power generation component, the wind turbine generator component includes a vertical axis impeller, a rotating shaft and a generator, the rotating shaft is vertically arranged, the vertical axis impeller is fixedly connected to the top of the rotating shaft, and also includes a conversion component, the conversion component includes a gearbox, a clutch A and a clutch B, a transmission shaft A and a transmission shaft B are rotatably arranged in the gearbox, a bevel gear A is fixedly provided on the transmission shaft A, a bevel gear B is fixedly provided on the transmission shaft B, the bevel gear A is meshed with the bevel gear B, one end of the transmission shaft A is connected to one end of the crankshaft through the clutch A, the other end of the transmission shaft A is connected to the input shaft of the generator, the clutch A is used to connect or disconnect the transmission shaft A and the crankshaft, one end of the transmission shaft B is connected to the bottom end of the rotating shaft through the clutch B, the clutch The clutch B is used to connect or disconnect the transmission shaft B and the rotating shaft; when in use, the transmission shaft B is connected to the rotating shaft through the clutch B and the crankshaft is disconnected from the transmission shaft A through the clutch A, and the mode of wind power generation can be switched. At this time, the vertical axis impeller can be driven by wind energy to rotate. When the vertical axis impeller rotates, the rotating shaft, the clutch B, the transmission shaft B, and the bevel gear B can be driven to rotate. Under the meshing action of the bevel gear A and the bevel gear B, the bevel gear A and the transmission shaft A can be further driven to rotate, thereby driving the generator to generate electricity; the transmission shaft B is disconnected from the rotating shaft through the clutch B and the crankshaft is connected to the transmission shaft A through the clutch A, and the mode of coupled power generation can be switched. At this time, the coupling drive component can be started to rotate the crankshaft. When the crankshaft rotates, the transmission shaft A can be directly driven to rotate through the clutch A, thereby driving the generator to generate electricity.

[0011] Furthermore, it also includes an air compression component, which includes a motor and an air compressor. The output shaft of the motor is connected to the input shaft of the air compressor, and the air outlet of the air compressor is connected to the air storage tank through a pipeline. The electric energy generated by the wind power generation component when driven by wind energy can power the motor, thereby driving the air compressor to operate, compress the air and store the compressed high-pressure air in the air storage tank.

[0012] Specifically, a buoyancy liquid is provided in the liquid tank, the liquid level of the buoyancy liquid is lower than the top of the guide rod, and the liquid level of the buoyancy liquid is higher than the top of the cylinder body when it is at the highest position. The cylinder body is immersed in the buoyancy liquid during the lifting process, and the buoyancy liquid is used to provide buoyancy to the cylinder body.

[0013] Specifically, the liquid tank is provided with a liquid injection port, which is used to inject buoyancy liquid into the liquid tank. The height of the liquid injection port is set lower than the top position of the guide rod to avoid the liquid level of the injected buoyancy liquid being too high and blocking the exhaust channel at the top of the guide rod.

[0014] Specifically, the guide rod is processed with an air intake section and an exhaust section, the diameters of the air intake section and the exhaust section are both smaller than the diameter of the guide rod, the air intake hole is arranged on the air intake section, and the exhaust hole is arranged on the exhaust section, forming an annular cavity with a certain axial length at the position of the air intake section and the exhaust section, which is used to adapt the inflation and exhaust time inside the cylinder to the lifting and lowering rhythm of the cylinder.

[0015] Specifically, an air distribution pipe is provided outside the liquid tank, and several of the air intake channels are connected to the air distribution pipe, and the air distribution pipe is connected to the gas storage tank. The high-pressure gas in the gas storage tank is filled into the air distribution pipe, and can supply gas to several of the air intake channels at the same time.

[0016] Specifically, a plurality of vent holes are provided on the upper portion of the liquid tank, the vent holes are communicated with the interior of the liquid tank, and the vent holes are used to lead the gas discharged from the plurality of cylinders to the outside of the liquid tank.

[0017] Specifically, the wind turbine generator assembly further includes a support tube, the rotating shaft is rotatably connected inside the support tube, one end of the support tube is fixedly connected to the gear box, and the support tube is used to support the rotating shaft.

[0018] The beneficial effects of the present invention are:

[0019] The compressed air energy storage type wind power generation system of the present invention comprises a coupling drive component, a wind power generation component, a conversion component and an air compression component.

[0020] The coupling drive assembly includes an air storage tank and a liquid tank. A crankshaft and several drive units are arranged in the liquid tank. The drive unit includes a cylinder, a piston plate, a guide rod, a sealing sleeve and a spring. The cylinder includes a cylinder body, a bottom plate, a sleeve and a connecting rod. When the coupling drive assembly is in use, buoyancy liquid is injected into the liquid tank, and the valve of the air storage tank is opened to continuously supply air to the air inlet channel at the bottom end of each guide rod. Each drive unit can change the displacement volume of the cylinder by inflating and exhausting the inside of the cylinder, and then drive the cylinder to perform reciprocating lifting motion through the change of buoyancy of the cylinder. Since each cylinder performs reciprocating lifting motion, it can further drive the crankshaft to rotate to achieve power output. The coupled drive assembly is driven by the principle of high-pressure air and buoyancy coupling. The high-pressure air comes from the compressed air stored in the air tank. Its air volume and air pressure are less affected by the ambient temperature. The buoyancy liquid can also be a suitable low-temperature resistant liquid. The coupled drive assembly can maintain normal operation under high-cold climate conditions. Compared with conventional battery energy storage forms, it avoids its short working life, high maintenance costs, and environmental pollution after disposal under high-cold climate conditions. Compared with other existing energy storage methods, the coupled drive assembly also has the characteristics of low cost, large capacity, and transferability.

[0021] The wind turbine generator assembly includes a vertical axis impeller, a rotating shaft and a generator; the conversion assembly includes a gearbox, a clutch A and a clutch B; the air compressor assembly includes a motor and an air compressor. When there is no need for water lifting operations, wind energy can be used to generate electricity through the wind power generation assembly. The generated electricity can be used to power the air compressor assembly to compress the air, and the compressed high-pressure air can be stored in the air tank for standby use; when water lifting is required and the wind speed is normal, wind energy can be used to directly generate electricity from the wind power generation assembly to supply water lifting equipment. When water lifting is required but the wind speed is too low or there is no wind, the generator can be driven by the coupling drive assembly to generate electricity to power the water lifting equipment. This can eliminate the intermittent and fluctuating effects of wind energy on the water lifting equipment, and effectively improve the level of water supply security. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the overall structure of the compressed air energy storage type wind power generation system of the present invention;

[0023] Figure 2 This is a schematic structural diagram of the coupling drive assembly in the compressed air energy storage type wind power generation system of the present invention;

[0024] Figure 3 for Figure 2 A schematic cross-sectional view of the structure inside the liquid tank of the coupling drive assembly shown;

[0025] Figure 4 for Figure 2 A schematic structural diagram of a drive unit in the coupled drive assembly shown;

[0026] Figure 5 for Figure 4 A schematic cross-sectional structural diagram of the drive unit shown;

[0027] Figure 6 for Figure 4 Schematic diagram of the disassembled structure of the drive unit shown;

[0028] Figure 7 A schematic diagram of the internal structure of a conversion component in a compressed air energy storage type wind power generation system of the present invention;

[0029] In the figure, 1-air storage tank, 2-liquid tank, 3-cylinder body, 4-bottom plate, 5-casing, 6-connecting rod, 7-piston plate, 8-guide rod, 9-sealing sleeve, 10-spring, 11-limiting platform, 12-intake channel, 13-exhaust channel, 14-intake hole, 15-exhaust hole, 16-connecting hole, 17-crankshaft, 18-vertical axis impeller, 19-rotating shaft, 20-generator, 21-gearbox, 22-clutch A, 23-clutch B, 24-drive shaft A, 25-drive shaft B, 26-bevel gear A, 27-bevel gear B, 28-motor, 29-air compressor, 30-liquid injection port, 31-liquid discharge port, 32-intake section, 33-exhaust section, 34-air distribution pipe, 35-vent, 36-support pipe. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] like Figure 1 As shown in FIG, the compressed air energy storage type wind power generation system includes a coupling drive component, a wind power generation component, a conversion component and an air compressor component. Figure 2 As shown, the coupled drive assembly includes an air tank 1 and a liquid tank 2. The air tank 1 is an existing pressure vessel for storing high-pressure air. The liquid tank 2 is a box structure. A crankshaft 17 and several drive units are arranged in the liquid tank 2.

[0032] like Figures 3 to 6 As shown, the driving unit includes a cylinder, a piston plate 7 , a guide rod 8 , a sealing sleeve 9 and a spring 10 .

[0033] The cylinder body includes a cylinder body 3, a bottom plate 4, a sleeve 5 and a connecting rod 6. The cylinder body 3 is a hollow columnar structure. The bottom plate 4 is fixedly connected to one end of the cylinder body 3 so that one end of the cylinder body 3 is closed. One end of the connecting rod 6 is fixedly connected to the other end of the cylinder body 3. The sleeve 5 is arranged in the cylinder body 3. The sleeve 5 is coaxial with the cylinder body 3. One end of the sleeve 5 is fixedly connected to the bottom plate 4, and the other end of the sleeve 5 extends outside the other end of the cylinder body 3. A piston plate 7 is arranged in the cylinder body 3. A through hole is opened on the piston plate 7. The outer periphery of the piston plate 7 is slidably fitted with the inner wall of the cylinder body 3. The piston plate 7 is sleeved on the sleeve 5 through the through hole thereon. The through hole is slidably fitted with the sleeve 5. As a result, the piston plate 7 can slide axially in the cylinder body 3. A cavity structure is formed between the outer wall of the sleeve 5, the inner wall of the cylinder body 3, the bottom plate 4 and the piston plate 7. The outer diameter of one end of the sleeve 5 close to the bottom plate 4 is processed to be larger, thereby forming a limit platform 11 there. The end of the connecting rod 6 connected to the cylinder body 3 is located inward in the radial direction of the cylinder body 3, thereby forming a limit portion at the end of the cylinder body 3 away from the bottom plate 4. The limit platform 11 and the limit portion are respectively used to limit the two sides of the piston plate 7. When the piston plate 7 abuts the limit platform 11, the volume of the above-mentioned cavity structure is the smallest, and when the piston plate 7 abuts the limit portion, the volume of the above-mentioned cavity structure is the largest.

[0034] The guide rod 8 is a rod-shaped component with an inlet channel 12 and an exhaust channel 13 machined inwardly along the axial direction at each end. These channels are machined to the designed lengths and are not interconnected. Several inlet holes 14 and exhaust holes 15 are also machined radially along the guide rod 8. The inlet holes 14 communicate with the inlet channels 12, and the exhaust holes 15 communicate with the exhaust channels 13. The guide rod 8 is positioned within the sleeve 5 and movably extends through the base plate 4. The guide rod 8 is slidably engaged with the sleeve 5, allowing the entire cylinder to slide axially along the guide rod 8. Several connecting holes 16 are processed along the radial direction on the limit platform 11. The air inlet hole 14 and the exhaust hole 15 are both adapted to the connecting holes 16. When the cylinder slides toward the air inlet channel 12 until the bottom plate 4 is close to the air inlet hole 14, the air inlet hole 14 and the connecting hole 16 can be connected. When the cylinder slides toward the exhaust channel 13 until the bottom plate 4 is close to the exhaust hole 15, the exhaust hole 15 and the connecting hole 16 can be connected.

[0035] The blocking sleeve 9 is a sliding sleeve structure that is slidably mounted on the guide rod 8. The blocking sleeve 9 is adapted to fit over the air inlet 14 and, when slid to the air inlet 14, blocks the air inlet 14. One end of the blocking sleeve 9 fits over the end of the base plate 4 away from the sleeve 5. When the cylinder slides toward the exhaust passage 13, the base plate 4 abuts against the end of the blocking sleeve 9 and pushes the blocking sleeve 9 to slide together.

[0036] like Figure 2 、 Figure 3As shown, the crankshaft 17 is arranged horizontally, with both ends of the crankshaft 17 rotatably connected to the liquid tank 2. The ends of the connecting rods 6 away from the barrel 3 are rotatably connected to the crank pins on the crankshaft 17. The guide rod 8 is arranged vertically, and the end of the guide rod 8 near the air inlet passage 12 passes through the bottom of the liquid tank 2 and is fixedly connected to the liquid tank 2. The air inlet passage 12 is connected to the air storage tank 1 via a pipeline (the pipeline at the end of the air storage tank 1 is not shown in the figure). One end of the spring 10 is fixedly connected to the liquid tank 2, and the other end of the spring 10 is fixedly connected to the sealing sleeve 9.

[0037] When the coupled drive assembly is in use, a buoyancy liquid of appropriate density is first injected into the liquid tank 2. The liquid level is kept below the top of the guide rod 8 to prevent it from blocking the exhaust passage 13. The liquid level is then kept above the top of the cylinder body 3 when it is at its highest position, allowing the buoyancy liquid to freely enter the side of the piston plate 7 within the cylinder body 3, away from the base plate 4, during the cylinder's lifting stroke. The buoyancy liquid exerts an upward buoyant force on the cylinder body. The density of the buoyancy liquid is compatible with the material and structural dimensions of the cylinder body, ensuring that the weight and buoyancy of the cylinder body are essentially balanced when the piston plate 7 is in the middle of the cylinder body 3.

[0038] After the buoyancy liquid is injected, the valve of the air tank 1 is opened to supply air to each air inlet channel 12, and the crankshaft 17 is rotated to make one part of the cylinder rise and the other part fall. Figure 3As shown: in the cylinder that rises to near the highest position, the connecting hole 16 is connected with the exhaust hole 15, and the piston plate 7 can be pushed downward by the dead weight of the piston plate 7 and the pressure of the buoyancy liquid above the piston plate 7. The air in the cavity structure formed between the outer wall of the sleeve 5, the inner wall of the cylinder body 3, the bottom plate 4 and the piston plate 7 is discharged outward through the connecting hole 16, the exhaust hole 15 and the exhaust channel 13 in sequence. When the cylinder continues to rise to the highest position, the piston plate 7 moves toward the bottom plate 4 until it abuts against the top of the limit platform 11, so that the volume of the cavity structure reaches the minimum. In this process, the volume of the above-mentioned cavity structure gradually decreases, that is, the volume of the liquid displaced by the cylinder gradually decreases. According to the buoyancy calculation formula, the buoyancy exerted on the cylinder also gradually decreases. When the volume of the cavity structure is the smallest, the gravity of the cylinder is greater than the buoyancy exerted on the cylinder, and the volume of the cylinder is The direction of the resultant force is downward; in the cylinder that has dropped to near the lowest position, the connecting hole 16 is connected to the air inlet hole 14, and the high-pressure air in the air storage tank 1 enters the cavity structure formed between the outer wall of the sleeve 5, the inner wall of the cylinder body 3, the bottom plate 4, and the piston plate 7 through the air inlet channel 12, the air inlet hole 14, and the connecting hole 16 in sequence. Due to the injection of high-pressure air, the piston plate 7 and the bottom plate 4 move in opposite directions until the cylinder drops to the lowest position, and the piston plate 7 abuts against the limit part so that the volume of the above-mentioned cavity structure reaches the maximum. In this process, the volume of the above-mentioned cavity structure gradually increases, that is, the volume of the liquid displaced by the cylinder gradually increases. According to the buoyancy calculation formula, the buoyancy received by the cylinder also gradually increases. When the volume of the cavity structure is the largest, the gravity of the cylinder is less than the buoyancy received, and the direction of the resultant force received by the cylinder is upward. Since each cylinder is rotatably connected to the crank pins on the crankshaft 17 through the connecting rod 6, when the cylinder moves to the highest position, it is subjected to a downward resultant force, and when the cylinder moves to the lowest position, it is subjected to an upward resultant force. At this time, the moving elements of the crankshaft mechanism can continuously drive the crankshaft 17 to rotate around the axis of its main journal to output power by coupling high-pressure air and buoyancy.

[0039] In each drive unit, the blocking sleeve 9 is used to realize the passive opening and closing control of the air inlet hole 14. When in use, the coupling drive component maintains the state of the air storage tank 1 continuously supplying air to each air inlet channel 12. When the cylinder is away from the top of the blocking sleeve 9, the blocking sleeve 9 is reset to the position of the air inlet channel 12 under the action of the spring 10 to block the air inlet channel 12; during the descending process of the cylinder, as the bottom plate 4 contacts the top of the blocking sleeve 9, the blocking sleeve 9 can be driven to descend together and compress the spring 10 until the connecting hole 16 is connected with the air inlet hole 14. Compared with the active control method through the control valve, this passive opening and closing control method is simpler to control and has stable operation. On the one hand, the sealing sleeve 9 can be opened in time during the descent of the cylinder to connect the air inlet 14 with the connecting hole 16 for inflation, thereby ensuring timely response of the inflation process; on the other hand, when the cylinder rises from the lowest position, the sealing sleeve 9 can be closed in time by the spring 10 to reduce the escape of high-pressure air. For each cylinder, the high-pressure gas lost in one movement cycle is only the volume of its volume, and the loss of high-pressure gas is relatively small. Driven by the large-capacity gas storage tank 1, the coupled drive assembly can maintain continuous operation for a long time.

[0040] It should be understood that the coupling drive assembly realizes the drive of the crankshaft 17 by coupling compressed air with buoyancy. When in use, it is necessary to keep the cylinder vertically lifted and lowered. In addition to realizing the charging and exhaust switching during the lifting process of the cylinder through the air inlet channel 12 and the exhaust channel 13, the guide rod 8 also plays a role of limiting and guiding the lifting process of the cylinder. Since the guide rod 8 is fixedly connected to the liquid tank 2, in application environments such as regional rotational grazing, when the compressed air energy storage type wind power generation system is moved to another site, it is only necessary to level the liquid tank 2 during the installation process of the liquid tank 2 so that the bottom of the liquid tank 2 is horizontal to keep the guide rod 8 in a vertical state, thereby ensuring the vertical lifting of the cylinder under the guiding action of the guide rod 8; the coupling drive assembly needs to give the crankshaft 17 initial power before starting to make one part of the cylinder rise to near the highest position and the other part of the cylinder fall to near the lowest position, so Figure 3 Both ends of the crankshaft 17 shown extend out of the liquid tank 2, one end serves as a power output end, and the other end serves as an adjustment end to rotate the crankshaft 17; Figure 3 The figure only shows the structure inside the liquid tank 2. In actual applications, higher load requirements can be met by increasing the length of the crankshaft 17 and the number of drive units. The crank pins on the crankshaft 17 are divided into two groups, and the angular phase difference between the two groups of crank pins is 180°, so that the lifting and lowering movements of the cylinders connected to the two groups of crank pins are opposite. When one group of cylinders is inflated near the lowest position to increase the displacement volume, the other group of cylinders is exhausted near the highest position to reduce the displacement volume. The synchronous movement of the two groups of cylinders can theoretically keep the buoyancy liquid level in the liquid tank 2 basically unchanged. If necessary, the transverse cross-sectional area of the liquid tank 2 can be further increased to reduce the change in the buoyancy liquid level when the coupled drive assembly is in operation, thereby ensuring the stable operation of the coupled drive assembly.

[0041] like Figure 1 、 Figure 7 As shown, the wind turbine assembly includes a vertical axis impeller 18, a rotating shaft 19 and a generator 20. The rotating shaft 19 is vertically arranged, and the vertical axis impeller 18 is fixedly connected to the top of the rotating shaft 19. The vertical axis impeller 18, the rotating shaft 19 and the generator 20 are components of an existing small wind turbine. The vertical axis impeller 18 rotates under the action of wind and can drive the rotating shaft 19 to rotate together. In the existing wind turbine, the rotating shaft 19 directly drives the generator 20 (a speed increaser is provided at the front end of the generator 20) to rotate to realize wind power generation. The conversion assembly includes a gearbox 21, a clutch A22 and a clutch B23. A transmission shaft A24 and a transmission shaft B25 are rotatably provided in the gearbox 21. A bevel gear A26 is fixedly provided on the transmission shaft A24, and a bevel gear B27 is fixedly provided on the transmission shaft B25. The bevel gear A26 is engaged with the bevel gear B27. One end of the transmission shaft A24 is connected to one end of the crankshaft 17 through the clutch A22, and the other end of the transmission shaft A24 is connected to the input shaft of the generator 20. One end of the transmission shaft B25 is connected to the bottom end of the rotating shaft 19 through the clutch B23. The clutch A22 and the clutch B23 can use any existing disconnectable couplings. The clutch A22 is used to connect or disconnect the transmission shaft A24 and the crankshaft 17. The clutch B23 is used to connect or disconnect the transmission shaft B25 and the rotating shaft 19. Function switching can be achieved through the clutch A22 and the clutch B23: when water needs to be pumped and the wind speed is normal, the transmission shaft B25 is connected to the rotating shaft 19 through the clutch B23, and the crankshaft 17 is disconnected from the transmission shaft A24 through the clutch A22. At this time, the wind power generation mode is switched to, and the vertical axis impeller 18, the rotating shaft 19, the clutch B23, the transmission shaft B25, and the bevel gear B27 are driven by wind energy to rotate, and the bevel gear A26 and the transmission shaft A27 are further driven by meshing. 24 rotates, thereby driving the generator 20 to generate electricity, and the generated electricity directly supplies power to the water-lifting equipment (the front end of the water-lifting equipment is equipped with a substation, a distribution station and other facilities); when water lifting is needed but the wind speed is too low or there is no wind, the transmission shaft B25 is disconnected from the rotating shaft 19 through the clutch B23, and the crankshaft 17 is connected to the transmission shaft A24 through the clutch A22. At this time, the coupling power generation mode is switched to start the coupling drive assembly to make the crankshaft 17 rotate continuously, which can directly drive the transmission shaft A24 to rotate through the clutch A22, thereby driving the generator 20 to generate electricity to supply power to the water-lifting equipment. In this mode, the transmission shaft B25 is disconnected from the rotating shaft 19 to avoid unnecessary load on the coupling drive assembly, and the vertical-axis impeller 18 and the rotating shaft 19 can also rotate freely.

[0042] like Figure 1As shown, the air compression assembly includes a motor 28 and an air compressor 29. The output shaft of motor 28 is connected to the input shaft of air compressor 29, and the air outlet of air compressor 29 is connected to air storage tank 1 via a pipeline. When water pumping is not required, clutch B23 connects drive shaft B25 to rotating shaft 19, and clutch A22 disconnects crankshaft 17 from drive shaft A24. At this point, the system switches to wind power generation mode, with wind energy driving the vertical-axis impeller 18, rotating shaft 19, clutch B23, drive shaft B25, and bevel gear B27. The meshing action further drives bevel gear A26 and drive shaft A24, thereby driving generator 20 to generate electricity. The generated electricity powers motor 28 (a substation, distribution station, and other facilities are located at the front of motor 28). Motor 28 then drives air compressor 29 to compress air, and the resulting high-pressure air is transported to air storage tank 1 for storage.

[0043] To sum up, the compressed air energy storage type wind power generation system realizes the compressed air energy storage form of the wind power generation water pumping system. When there is no need for water pumping operations, electricity can be generated by the wind power generation components. The generated electricity can power the air compressor components to compress the air, and the compressed high-pressure air can be stored in the air storage tank 1 for standby use; when water pumping is needed but the wind speed is too low or there is no wind, the generator 20 can be driven by the coupling drive component to generate electricity to temporarily power the water pumping equipment, thereby eliminating the intermittent and fluctuating effects of wind energy on the water pumping equipment and effectively improving the level of water supply security. The coupling drive component is driven by the principle of coupling of high-pressure air and buoyancy, wherein the high-pressure air comes from the compressed air stored in the air storage tank 1 by the air compressor component. The air volume and air pressure are less affected by the ambient temperature, and the buoyancy liquid can also be a suitable low-temperature resistant liquid. The coupling drive component can maintain normal operation under high-cold climate conditions. Compared with conventional battery energy storage forms, it avoids the problems of short working life, high maintenance costs, and environmental pollution after disposal under high-cold climate conditions. Compared with other existing energy storage methods, it also has the characteristics of low cost, large capacity, transferability, and strong environmental adaptability.

[0044] When implementing:

[0045] like Figure 1 As shown, the liquid tank 2 is provided with an injection port 30 and a discharge port 31. The injection port 30 is used to inject buoyancy liquid into the liquid tank 2. The setting height of the injection port 30 is lower than the top position of the guide rod 8 and higher than the top position of the cylinder body 3 when the cylinder body rises to the highest point, which can facilitate liquid injection and avoid excessive injection of buoyancy liquid so that the liquid level exceeds the top of the guide rod 8 and blocks the exhaust channel 13 on the guide rod 8; the discharge port 31 is set near the bottom of the liquid tank 2. When the buoyancy liquid is replaced or needs to be transferred and moved, the buoyancy liquid in the liquid tank 2 can be discharged through the discharge port 31.

[0046] like Figure 5 、 Figure 6As shown, the guide rod 8 is machined with an air intake section 32 and an air exhaust section 33. The diameters of the air intake section 32 and the air exhaust section 33 are both smaller than the diameter of the guide rod 8, so that the air intake section 32 and the air exhaust section 33 form an annular cavity with a certain axial length inside the sleeve 5. The air intake hole 14 is provided on the air intake section 32, and the air exhaust hole 15 is provided on the air exhaust section 33. Because the annular cavity has a certain axial length, when the cylinder body descends to near the lowest position, the connecting hole 16 connects with the air intake hole 14 through the annular cavity at the air intake section 32 to begin filling. In this filled state, the cylinder body can continue to descend to the lowest position driven by the inertia of the movement and other driving units. Conversely, when the cylinder body rises to near the highest position, the connecting hole 16 connects with the air exhaust hole 15 through the annular cavity at the air exhaust section 33 to begin exhausting. In this exhausting state, the cylinder body can continue to rise to the highest position driven by the inertia of the movement and other driving units. This achieves matching of the filling and exhausting time of the cylinder body with the overall lifting rhythm of the cylinder body.

[0047] like Figure 2 As shown, a gas distribution pipe 34 is provided outside the liquid tank 2. Several air inlet channels 12 are connected to the gas distribution pipe 34, which in turn is connected to the air storage tank 1. When the valve of the air storage tank 1 is opened, the high-pressure gas in the air storage tank 1 fills the gas distribution pipe 34, simultaneously supplying air to each air inlet channel 12. Multiple air storage tanks 1 can be provided, and each air storage tank 1 can be used in rotation, thereby increasing the gas storage capacity and extending the operating time of the coupled drive assembly.

[0048] like Figure 2 As shown, a plurality of vent holes 35 are opened on the upper portion of the liquid tank 2 , and the vent holes 35 are communicated with the interior of the liquid tank 2 . The vent holes 35 are used to discharge the high-pressure gas discharged from each cylinder to the outside of the liquid tank 2 .

[0049] like Figure 1 、 Figure 7 As shown, the wind turbine assembly also includes a support tube 36 , one end of which is fixedly connected to the gear box 21 , and the rotating shaft 19 is rotatably connected in the support tube 36 , and the support tube 36 supports the rotating shaft 19 and the vertical axis impeller 18 .

[0050] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. Compressed air energy storage type wind power generation system, characterized in that: It includes a coupled drive assembly, the coupled drive assembly includes an air storage tank and a liquid tank, a crankshaft and a plurality of drive units are arranged in the liquid tank, and the drive unit includes a cylinder, a piston plate, and a guide rod; The cylinder body includes a cylinder body, a bottom plate, a sleeve and a connecting rod. The cylinder body is a hollow columnar structure. The bottom plate is fixedly connected to one end of the cylinder body. One end of the connecting rod is fixedly connected to the other end of the cylinder body. The sleeve is coaxial with the cylinder body. One end of the sleeve is fixedly connected to the bottom plate. The other end of the sleeve extends outside the other end of the cylinder body. A through hole is provided on the piston plate, and the piston plate is arranged in the cylinder body. The outer periphery of the piston plate is slidably fitted with the inner wall of the cylinder body, and the through hole is slidably fitted with the sleeve. A limiting platform is formed at one end of the sleeve close to the bottom plate, and a limiting portion is formed at one end of the cylinder body away from the bottom plate. The limiting platform and the limiting portion are respectively used to limit the two sides of the piston plate. An air intake channel and an exhaust channel are respectively machined inwardly along the axial direction at both ends of the guide rod, and a plurality of air intake holes and exhaust holes are machined on the guide rod in the radial direction, the air intake holes are connected to the air intake channel, and the exhaust holes are connected to the exhaust channel. The guide rod is arranged in the sleeve and movably passes through the bottom plate, the guide rod is slidably adapted to the sleeve, and a plurality of communicating holes are machined on the limit platform in the radial direction, and the air intake holes and exhaust holes are adapted to the communicating holes; The crankshaft is arranged horizontally, and both ends of the crankshaft are rotatably connected to the liquid tank, and the ends of the connecting rods away from the barrel are rotatably connected to the crank pins on the crankshaft. The guide rod is vertically arranged, and one end of the guide rod close to the air inlet channel passes through the bottom of the liquid tank and is fixedly connected to the liquid tank. The air inlet channel is communicated with the air storage tank.

2. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: The driving unit also includes a sealing sleeve and a spring. The sealing sleeve is slidably mounted on the guide rod. The sealing sleeve is adapted to the air inlet hole. One end of the sealing sleeve is adapted to an end of the bottom plate away from the sleeve. One end of the spring is fixedly connected to the other end of the sealing sleeve, and the other end of the spring is fixedly connected to the bottom of the liquid tank.

3. The compressed air energy storage type wind power generation system according to claim 2, characterized in that: It also includes a wind power generation component, the wind power generator component includes a vertical shaft impeller, a rotating shaft and a generator, the rotating shaft is vertically arranged, the vertical shaft impeller is fixedly connected to the top end of the rotating shaft, It also includes a conversion assembly, which includes a gear box, a clutch A and a clutch B. A transmission shaft A and a transmission shaft B are rotatably provided in the gear box. A bevel gear A is fixedly sleeved on the transmission shaft A, and a bevel gear B is fixedly sleeved on the transmission shaft B. The bevel gear A is meshed with the bevel gear B. One end of the transmission shaft A is connected to one end of the crankshaft via a clutch A, and the other end of the transmission shaft A is connected to the input shaft of the generator. The clutch A is used to connect or disconnect the transmission shaft A and the crankshaft. One end of the transmission shaft B is connected to the bottom end of the rotating shaft via a clutch B, and the clutch B is used to connect or disconnect the transmission shaft B and the rotating shaft.

4. The compressed air energy storage type wind power generation system according to claim 3, characterized in that: It also includes an air compression component, which includes a motor and an air compressor. The output shaft of the motor is connected to the input shaft of the air compressor, and the air outlet of the air compressor is connected to the air storage tank through a pipeline.

5. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: The liquid box is provided with a liquid injection port, and the setting height of the liquid injection port is lower than the top end position of the guide rod.

6. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: Buoyancy liquid is arranged in the liquid tank, the liquid level of the buoyancy liquid is lower than the top end of the guide rod, and the liquid level of the buoyancy liquid is higher than the top end of the cylinder body when it is at the highest position.

7. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: An air intake section and an air exhaust section are processed on the guide rod. The diameters of the air intake section and the air exhaust section are both smaller than the diameter of the guide rod. The air intake hole is arranged on the air intake section, and the air exhaust hole is arranged on the air exhaust section.

8. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: An air distribution pipe is provided outside the liquid tank, and a plurality of the air inlet channels are all connected to the air distribution pipe, and the air distribution pipe is connected to the air storage tank.

9. The compressed air energy storage type wind power generation system according to claim 1, characterized in that: A plurality of vent holes are provided on the upper portion of the liquid tank, and the vent holes are communicated with the interior of the liquid tank.

10. The compressed air energy storage type wind power generation system according to claim 3, characterized in that: The wind turbine generator assembly further includes a support tube, the rotating shaft is rotatably connected inside the support tube, and one end of the support tube is fixedly connected to the gear box.

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