Compressed air energy storage type wind power generation system

Abstract

The invention relates to the technical field of wind power generation water lifting, and discloses a compressed air energy storage type wind power generation system which comprises a coupling driving assembly, a wind power generation assembly, a conversion assembly and an air compression assembly, when water lifting operation is not needed, power can be generated through the wind power generation assembly so as to supply power to the air compression assembly, and compressed high-pressure air is stored in an air storage tank for standby application; when water lifting is needed and the wind speed is normal, power can be directly generated through the wind power generation assembly to be used by water lifting equipment, when water lifting is needed and the wind speed is too low or no wind exists, the coupling driving assembly can drive the power generator to operate to generate power to supply power to the water lifting equipment, and therefore the water supply guarantee level is improved; wherein the coupling driving assembly adopts a high-pressure air and buoyancy coupling driving principle, can normally operate under the high and cold weather condition, solves the problems of short service life, high maintenance cost, environmental pollution after discarding and the like of a storage battery energy storage form under the high and cold weather condition, and also has the characteristics of low cost, large capacity, capability of being transferred and moved and the like.

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] At present, small-scale wind power generation and water-lifting systems have been gradually applied in agricultural and pastoral areas in remote areas to replace manual water extraction. The wind power generation and water-lifting systems are divided into two types: energy storage type and non-energy storage type. The power supply component of the non-energy storage type water-lifting system is a conventional wind power generation system, which can convert wind energy into electrical energy and transmit the generated electrical energy to the water-lifting equipment, thereby driving the water-lifting equipment to operate to complete the water-lifting operation; this non-energy storage type water-lifting system is affected by the intermittent and volatile nature of wind energy, and often appears when the wind speed is too low or there is no wind when water is needed, or when the wind speed is too fast when water is not needed and the system needs to be shut down, resulting in a low level of water supply security. The energy storage type water-lifting system is based on the non-energy storage type water-lifting system. The energy storage component is set up on the basis of the non-energy storage type water-lifting system. When there is no need for water-lifting operations, the energy storage component stores the electrical energy converted by the power supply component for standby use. When the wind speed is too low or there is no wind, the energy storage component temporarily supplies power to the water-lifting equipment to complete the water-lifting operation, thereby effectively improving the level of water supply security.

[0003] The energy storage components in existing energy storage water pumping systems are usually battery packs. Due to the short working life of batteries under high-cold climate conditions, high maintenance costs, and the large amount of acid and lead produced after disposal, which will cause serious environmental pollution, the existing energy storage water pumping systems are not suitable for areas with high-cold climate environments. In recent years, with the development of science and technology, the development of new energy technologies has gradually begun to pay attention to 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, hydrogen energy storage, etc. However, based on the actual application environment of agricultural and pastoral areas in remote high-cold areas, these energy storage methods are difficult to simultaneously take into account 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 prior art 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 a motor, drive an air compressor to operate, and input compressed air into an air tank for energy storage. When water lifting operations are required but the wind speed is too low, the high-pressure gas output from the air tank can be coupled with buoyancy to drive the generator to operate and generate electricity to power the water lifting equipment through a coupling drive component, 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 objective of the present invention is achieved through the following technical solutions: Compressed air energy storage type wind power generation system, including a coupling drive assembly, the coupling drive assembly includes an air storage tank and a liquid tank, and a crankshaft and several drive units are arranged in the liquid tank; The drive unit includes a cylinder body, 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, and the other end of the sleeve extends outside the other end of the cylinder body. A through hole is formed in the piston plate. The piston plate is arranged in the cylinder body. The outer periphery of the piston plate is slidably matched with the inner wall of the cylinder body. The through hole is slidably matched with the sleeve. A limiting platform is formed at one end of the sleeve close to the bottom plate, and a limiting part is formed at one end of the cylinder body away from the bottom plate. The limiting platform and the limiting part are respectively used for limiting both sides of the piston plate. Intake channels and exhaust channels are respectively machined inward along the axial direction at both ends of the guide rod. A plurality of intake holes and a plurality of exhaust holes are machined along the radial direction on the guide rod. The intake holes are communicated with the intake channels, and the exhaust holes are communicated with the exhaust channels. The guide rod is arranged in the sleeve and movably penetrates through the bottom plate. The guide rod is slidably matched with the sleeve. A plurality of communication holes are machined along the radial direction on the limiting platform. The intake holes and the exhaust holes are both adapted to the communication holes. The guide rod is vertically arranged. One end of the guide rod close to the intake channel penetrates through the bottom of the liquid tank and is fixedly connected to the liquid tank. The intake channel is communicated with the air storage tank. The drive unit can utilize the coupling drive principle of compressed air and buoyancy, and change the liquid discharge volume of the cylinder body by inflating and exhausting air inside the cylinder body, and further drive the cylinder body to perform reciprocating lifting and lowering movements by the change of the buoyancy force received by the cylinder body; The crankshaft is horizontally arranged, and both ends of the crankshaft are rotatably connected to the liquid tank. One end of each of the several connecting rods away from the cylinder body is rotatably connected to several crank pins on the crankshaft. Since several cylinder bodies perform reciprocating lifting and lowering movements, the crankshaft can be further driven to rotate.

[0006] Further, the drive unit further includes a plugging sleeve and a spring. The plugging sleeve is slidably sleeved on the guide rod. The plugging sleeve is adapted to the intake holes. One end of the plugging 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 plugging sleeve, and the other end of the spring is fixedly connected to the bottom of the liquid tank. The plugging sleeve and the spring can be used to realize the passive opening and closing control of the intake holes.

[0007] Further, it further includes a wind power generation component. The wind power generation component includes a vertical-axis impeller, a rotating shaft, and a generator. The rotating shaft is arranged vertically, and the vertical-axis impeller is fixedly connected to the top end of the rotating shaft. It further includes a conversion component, which includes a gearbox, a clutch A, and a clutch B. A drive shaft A and a drive shaft B are rotatably arranged in the gearbox. A bevel gear A is fixedly sleeved on the drive shaft A, and a bevel gear B is fixedly sleeved on the drive shaft B. The bevel gear A meshes with the bevel gear B. One end of the drive shaft A is connected to one end of the crankshaft through the clutch A, and the other end of the drive shaft A is connected to the input shaft of the generator. The clutch A is used to connect or disconnect the drive shaft A and the crankshaft. One end of the drive shaft B is connected to the bottom end of the rotating shaft through the clutch B. The clutch B is used to connect or disconnect the drive shaft B and the rotating shaft; in application, by connecting the drive shaft B and the rotating shaft through the clutch B and disconnecting the crankshaft and the drive shaft A through the clutch A, it can be switched to the wind power generation mode. At this time, the wind energy can drive the vertical-axis impeller to rotate. When the vertical-axis impeller rotates, it can drive the rotating shaft, the clutch B, the drive shaft B, and the bevel gear B to rotate. Under the meshing action of the bevel gear A and the bevel gear B, it can further drive the bevel gear A and the drive shaft A to rotate, thereby driving the generator to generate electricity; by disconnecting the drive shaft B and the rotating shaft through the clutch B and connecting the crankshaft and the drive shaft A through the clutch A, it can be switched to the coupled power generation mode. At this time, the coupled drive component can be started to make the crankshaft rotate. When the crankshaft rotates, it can directly drive the drive shaft A to rotate through the clutch A, and further drive the generator to generate electricity.

[0008] Further, it further 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. The air outlet of the air compressor is communicated with the air storage tank through a pipeline. The electric energy generated by the operation of the wind power generation component driven by wind energy can supply power to the motor, and further drive the air compressor to operate, compress air and store the compressed high-pressure air into the air storage tank.

[0009] Specifically, a 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 higher than the top end of the cylinder body at the highest position. The cylinder body is immersed in the buoyancy liquid during the lifting and lowering process. The buoyancy liquid is used to provide buoyancy to the cylinder body.

[0010] Specifically, a liquid injection port is opened on the liquid tank. The liquid injection port is used to inject the buoyancy liquid into the liquid tank. The installation height of the liquid injection port is lower than the top end position of the guide rod to prevent the liquid level of the injected buoyancy liquid from being too high and blocking the exhaust passage at the top end of the guide rod.

[0011] Specifically, an air intake section and an air exhaust section are machined on the guide rod. The diameters of both the air intake section and the air exhaust section are smaller than the diameter of the guide rod. The air intake holes are arranged on the air intake section, and the air exhaust holes are arranged on the air exhaust section. An annular cavity with a certain axial length is formed at the positions of the air intake section and the air exhaust section for adapting the inflation and exhaust time inside the cylinder body to the lifting rhythm of the cylinder body.

[0012] Specifically, an air distribution pipe is arranged outside the liquid tank. A plurality of the air intake channels are all communicated with the air distribution pipe, and the air distribution pipe is communicated with the gas storage tank. The high-pressure gas in the gas storage tank fills into the air distribution pipe, and can supply gas to a plurality of the air intake channels simultaneously.

[0013] Specifically, a plurality of ventilation holes are opened in the upper part of the liquid tank. The ventilation holes are communicated with the inside of the liquid tank, and the through holes are used for leading out the gas discharged from a plurality of the cylinder bodies to the outside of the liquid tank.

[0014] Specifically, the wind power generation assembly further includes a support pipe. The rotating shaft is rotatably connected inside the support pipe. One end of the support pipe is fixedly connected with the gearbox, and the support pipe is used for supporting the rotating shaft.

[0015] The beneficial effects of the present invention are as follows: The compressed air energy storage type wind power generation system of the present invention includes a coupling drive assembly, a wind power generation assembly, a conversion assembly and a pneumatic pressure assembly.

[0016] The coupling drive assembly includes a gas storage tank and a liquid tank. A crankshaft and a plurality of drive units are arranged inside the liquid tank. The drive unit includes a cylinder body, a piston plate, a guide rod, a plugging sleeve and a spring. The cylinder body 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 gas storage tank is opened to continuously supply gas to the air intake channels at the bottom ends of the guide rods. Each drive unit can change the drainage volume of the cylinder body by inflating and exhausting air inside the cylinder body, and further drive the cylinder body to make a reciprocating lifting motion through the change of the buoyancy force received by the cylinder body. Since each cylinder body makes a reciprocating lifting motion, the crankshaft can be further driven to rotate to achieve power output. The coupling drive assembly is based on the principle of coupling drive of high-pressure air and buoyancy. The high-pressure air comes from the compressed air stored in the gas storage tank, and its gas volume and air pressure are less affected by the ambient temperature. The buoyancy liquid can also be selected as a suitable liquid resistant to low temperature. Under the alpine climate conditions, the coupling drive assembly can operate normally. Compared with the conventional battery energy storage form, it avoids the problems such as short working life, high maintenance cost and environmental pollution after abandonment under the alpine climate conditions. Compared with other existing energy storage methods, the coupling drive assembly also has the characteristics of low cost, large capacity and movable transfer.

[0017] The wind turbine assembly includes a vertical-axis impeller, a rotating shaft, and a generator. The conversion assembly includes a gearbox, clutch A, and clutch B. The air compressor assembly includes a motor and an air compressor. When water pumping operation is not required, wind energy can be utilized to generate electricity through the wind power generation assembly. The generated electric energy can supply power to the air compressor assembly to compress air, and the compressed high-pressure air is stored in a gas storage tank for standby. When water pumping is needed and the wind speed is normal, wind energy can be directly used to generate electricity by the wind power generation assembly for the water pumping equipment. When water pumping is needed but the wind speed is too low or there is no wind, the generator can be driven to operate and generate electricity through the coupling drive assembly to supply power to the water pumping equipment. Thus, the intermittent and fluctuating influence of wind energy on the water pumping equipment can be eliminated, and the water supply guarantee level can be effectively improved. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the compressed air energy storage type wind power generation system of the present invention; Figure 2 It is a schematic diagram of the structure of the coupling drive assembly in the compressed air energy storage type wind power generation system of the present invention; Figure 3 is Figure 2 a schematic cross-sectional view of the internal structure of the liquid tank in the shown coupling drive assembly; Figure 4 is Figure 2 a schematic diagram of the structure of the drive unit in the shown coupling drive assembly; Figure 5 is Figure 4 a schematic cross-sectional view of the structure of the shown drive unit; Figure 6 is Figure 4 a schematic diagram of the disassembled structure of the shown drive unit; Figure 7 It is a schematic diagram of the internal structure of the conversion assembly in the compressed air energy storage type wind power generation system of the present invention; In the figure, 1 - gas storage tank, 2 - liquid tank, 3 - cylinder body, 4 - bottom plate, 5 - sleeve, 6 - connecting rod, 7 - piston plate, 8 - guide rod, 9 - sealing sleeve, 10 - spring, 11 - limiting platform, 12 - air inlet channel, 13 - air outlet channel, 14 - air inlet hole, 15 - air outlet hole, 16 - communication 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 - air inlet section, 33 - air outlet section, 34 - air distribution pipe, 35 - ventilation hole, 36 - support pipe. Detailed Embodiment

[0019] 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 description.

[0020] As Figure 1 shown, the compressed air energy storage type wind power generation system includes a coupling drive assembly, a wind power generation assembly, a conversion assembly, and a pneumatic pressure assembly. As Figure 2 shown, the coupling drive assembly includes an air storage tank 1 and a liquid tank 2. The air storage tank 1 is a pressure vessel existing for storing high-pressure air, and the liquid tank 2 is a box structure. A crankshaft 17 and a plurality of drive units are provided in the liquid tank 2.

[0021] As Figures 3 to 6 shown, the drive unit includes a cylinder body, a piston plate 7, a guide rod 8, a plugging sleeve 9, and a spring 10.

[0022] 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. The piston plate 7 is arranged in the cylinder body 3. A through hole is formed in the piston plate 7. The outer periphery of the piston plate 7 is slidably matched with the inner wall of the cylinder body 3. The piston plate 7 is sleeved on the sleeve 5 through the through hole thereon, and the through hole is slidably matched with the sleeve 5. Thus, the piston plate 7 can axially slide 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, so that a limiting platform 11 is formed at this position. One end of the connecting rod 6 connected to the cylinder body 3 is located at an inner position in the radial direction of the cylinder body 3, so that a limiting part is formed at the other end of the cylinder body 3 away from the bottom plate 4. The limiting platform 11 and the limiting part are respectively used to limit both sides of the piston plate 7. When the piston plate 7 abuts against the limiting platform 11, the volume of the above cavity structure is the smallest. When the piston plate 7 abuts against the limiting part, the volume of the above cavity structure is the largest.

[0023] The guide rod 8 is a rod-shaped part. At both ends of the guide rod 8, an air intake passage 12 and an exhaust passage 13 are respectively machined inward along the axial direction. When machining, the air intake passage 12 and the exhaust passage 13 are machined according to the designed length, and the two do not communicate with each other. Along the radial direction of the guide rod 8, a number of air intake holes 14 and a number of exhaust holes 15 are also machined. The air intake holes 14 communicate with the air intake passage 12, and the exhaust holes 15 communicate with the exhaust passage 13. The guide rod 8 is arranged in the sleeve 5 and movably penetrates through the bottom plate 4. The guide rod 8 is slidably adapted to the sleeve 5, and the whole cylinder body can slide axially along the guide rod 8. Along the radial direction of the limit platform 11, a number of communication holes 16 are machined. The air intake holes 14 and the exhaust holes 15 are both adapted to the communication holes 16. When the cylinder body slides towards the air intake passage 12 until the bottom plate 4 is close to the air intake holes 14, the air intake holes 14 can be made to communicate with the communication holes 16. When the cylinder body slides towards the exhaust passage 13 until the bottom plate 4 is close to the exhaust holes 15, the exhaust holes 15 can be made to communicate with the communication holes 16.

[0024] The plugging sleeve 9 has a sliding sleeve structure. The plugging sleeve 9 is slidably sleeved on the guide rod 8. The plugging sleeve 9 is adapted to the air intake holes 14. When the plugging sleeve 9 slides to the position of the air intake holes 14, the air intake holes 14 can be plugged. One end of the plugging sleeve 9 is adapted to the end of the bottom plate 4 away from the sleeve 5. When the cylinder body slides towards the exhaust passage 13, the bottom plate 4 can abut against the end of the plugging sleeve 9 and push the plugging sleeve 9 to slide together.

[0025] As Figure 2 、 Figure 3 shown, the crankshaft 17 is horizontally arranged. Both ends of the crankshaft 17 are rotatably connected to the liquid tank 2. One ends of a number of connecting rods 6 away from the cylinder body 3 are respectively rotatably connected to a number of crank pins on the crankshaft 17. The guide rod 8 is vertically arranged. One end of the guide rod 8 close to the air intake passage 12 penetrates through the bottom of the liquid tank 2 and is fixedly connected to the liquid tank 2. The air intake passage 12 communicates with the gas storage tank 1 through a pipeline (the pipeline at the end of the gas 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 plugging sleeve 9.

[0026] When the coupling drive assembly is in use, first inject a buoyancy liquid with an appropriate density into the liquid tank 2. The liquid level of the buoyancy liquid is lower than the top end of the guide rod 8 to prevent the buoyancy liquid from plugging the exhaust passage 13. The liquid level of the buoyancy liquid is higher than the top end of the cylinder body 3 in the highest position, so that the buoyancy liquid can freely enter the side of the piston plate 7 away from the bottom plate 4 in the cylinder body 3 during the lifting and lowering stroke of the cylinder body. Under the action of the buoyancy liquid, the cylinder body receives an upward buoyancy force. The density of the buoyancy liquid is adapted to the material, structure and size of the cylinder body, so that when the piston plate 7 is located in the middle position of the cylinder body 3, the gravity of the cylinder body is basically balanced with the buoyancy force.

[0027] After injecting the buoyancy liquid, open the valve of the gas storage tank 1 to supply air to each air intake passage 12, and rotate the crankshaft 17 to make a part of the cylinder body rise and another part of the cylinder body fall. At this time, as Figure 3As shown in the figure: In the cylinder body rising close to the highest position, the communication hole 16 is communicated with the exhaust hole 15. Under the self-gravity of the piston plate 7 and the pressure of the buoyancy liquid above the piston plate 7, the piston plate 7 can be pushed to slide downward. The air in the cavity structure formed among 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 successively through the communication hole 16, the exhaust hole 15, and the exhaust passage 13. When the cylinder body continues to rise to the highest position, the piston plate 7 moves towards the bottom plate 4 until it abuts against the top end of the limit platform 11, making the volume of the cavity structure reach the minimum. During this process, the volume of the above cavity structure gradually becomes smaller, that is, the volume of the liquid displaced by the cylinder body gradually becomes smaller. According to the buoyancy calculation formula, the buoyancy received by the cylinder body also gradually becomes smaller. When the volume of the cavity structure is the smallest, the gravity of the cylinder body is greater than the buoyancy received, and the resultant force direction of the cylinder body is downward; in the cylinder body descending close to the lowest position, the communication hole 16 is communicated with the air inlet hole 14. The high-pressure air in the gas storage tank 1 enters the cavity structure formed among the outer wall of the sleeve 5, the inner wall of the cylinder body 3, the bottom plate 4, and the piston plate 7 successively through the air inlet passage 12, the air inlet hole 14, and the communication hole 16. Due to the injection of high-pressure air, the piston plate 7 and the bottom plate 4 move in opposite directions. Until the cylinder body descends to the lowest position, the piston plate 7 abuts against the limiting part, making the volume of the above cavity structure reach the maximum. During this process, the volume of the above cavity structure gradually becomes larger, that is, the volume of the liquid displaced by the cylinder body gradually becomes larger. According to the buoyancy calculation formula, the buoyancy received by the cylinder body also gradually becomes larger. When the volume of the cavity structure is the largest, the gravity of the cylinder body is less than the buoyancy received, and the resultant force direction of the cylinder body is upward. Since each cylinder body is rotatably connected to each crank pin on the crankshaft 17 through the connecting rod 6, when the cylinder body moves to the highest position, it receives a downward resultant force, and when the cylinder body moves to the lowest position, it receives an upward resultant force. At this time, the moving elements constituting the crankshaft mechanism can continuously drive the crankshaft 17 to rotate around the axis of its main journal to output power through the coupling method of high-pressure air and buoyancy.

[0028] In each drive unit, the plug sleeve 9 is used to passively control the opening and closing of the air inlet hole 14. When the coupling drive assembly is in use, the air storage tank 1 continuously supplies air to each air inlet passage 12. When the cylinder body moves away from the top end of the plug sleeve 9, the plug sleeve 9 is reset to the position of the air inlet passage 12 under the action of the spring 10 to block the air inlet passage 12. During the downward movement of the cylinder body, as the bottom plate 4 contacts the top end of the plug sleeve 9, the plug sleeve 9 can be driven to descend together and compress the spring 10 until the communication hole 16 is communicated with the air inlet hole 14. Compared with the active control method through a control valve, this passive opening and closing control form is simpler in control and more stable in operation. On the one hand, during the downward movement of the cylinder body, the plug sleeve 9 can be opened in time to communicate the air inlet hole 14 with the communication hole 16 for inflation, ensuring the timely response of the inflation process. On the other hand, when the cylinder body rises from the lowest position, the plug sleeve 9 can be closed in time by the spring 10 to reduce the escape of high-pressure air. For each cylinder body, the high-pressure gas lost during one movement cycle is only the volume of its own volume, and the loss of high-pressure gas is less. Driven by a large-capacity air storage tank 1, the coupling drive assembly can maintain continuous operation for a long time.

[0029] It should be understood that the coupling drive assembly realizes the drive of the crankshaft 17 by the coupling of compressed air and buoyancy. During application, the cylinder body needs to be vertically lifted and lowered. The guide rod 8 not only realizes the air charging and discharging switching during the lifting and lowering process of the cylinder body through the air inlet passage 12 and the exhaust passage 13, but also plays a role in limiting and guiding the lifting and lowering process of the cylinder body. Since the guide rod 8 is fixedly connected to the liquid tank 2, in application environments such as rotational grazing in divided areas, when transferring and moving this compressed air energy storage type wind power generation system, only the liquid tank 2 needs to be leveled during the installation process of the liquid tank 2, and making the bottom of the liquid tank 2 horizontal can keep the guide rod 8 in a vertical state, so as to ensure the vertical lifting and lowering of the cylinder body under the guiding action of the guide rod 8. Before the coupling drive assembly is started, an initial power needs to be given to the crankshaft 17 to make a part of the cylinder body rise to near the highest position and another part of the cylinder body descend to near the lowest position. Therefore, as Figure 3 shown, both ends of the crankshaft 17 extend out of the liquid tank 2. One end is used as the power output end, and the other end is used as the adjustment end to rotate the crankshaft 17; Figure 3 The figure shown is only a schematic diagram of the structure inside the liquid tank 2. In actual application, the length of the crankshaft 17 and the number of drive units can be increased to meet higher load requirements. The crank pins on the crankshaft 17 are evenly divided into two groups, and the angular phases of the two groups of crank pins differ by 180°, so that the lifting and lowering movements of the cylinder bodies connected to the two groups of crank pins are opposite. When one group of cylinder bodies inflates near the lowest position and increases the drainage volume, the other group of cylinder bodies exhaust near the highest position and reduces the drainage volume. The synchronous actions of the two groups of cylinder bodies can theoretically keep the liquid level of the buoyancy liquid in the liquid tank 2 basically unchanged. When necessary, the transverse cross-sectional area of the liquid tank 2 can be further increased to reduce the change of the liquid level of the buoyancy liquid during the operation of the coupling drive assembly, ensuring the stable operation of the coupling drive assembly.

[0030] As shown in Figure 1 and Figure 7 , the wind turbine assembly includes a vertical-axis impeller 18, a rotating shaft 19, and a generator 20. The rotating shaft 19 is arranged vertically, and the vertical-axis impeller 18 is fixedly connected to the top end 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 to 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 achieve wind power generation. The conversion assembly includes a gearbox 21, a clutch A 22, and a clutch B 23. A drive shaft A 24 and a drive shaft B 25 are rotatably arranged in the gearbox 21. A bevel gear A 26 is fixedly sleeved on the drive shaft A 24, and a bevel gear B 27 is fixedly sleeved on the drive shaft B 25. The bevel gear A 26 meshes with the bevel gear B 27. One end of the drive shaft A 24 is connected to one end of the crankshaft 17 through the clutch A 22, and the other end of the drive shaft A 24 is connected to the input shaft of the generator 20. One end of the drive shaft B 25 is connected to the bottom end of the rotating shaft 19 through the clutch B 23. The clutch A 22 and the clutch B 23 can be selected from any existing form of disconnectable couplings. The clutch A 22 is used to connect or disconnect the drive shaft A 24 and the crankshaft 17, and the clutch B 23 is used to connect or disconnect the drive shaft B 25 and the rotating shaft 19. Function switching can be achieved through the clutch A 22 and the clutch B 23: when water pumping is required and the wind speed is normal, the drive shaft B 25 is connected to the rotating shaft 19 through the clutch B 23, and the crankshaft 17 is disconnected from the drive shaft A 24 through the clutch A 22. At this time, it is switched to the wind power generation mode. The wind energy drives the vertical-axis impeller 18, the rotating shaft 19, the clutch B 23, the drive shaft B 25, and the bevel gear B 27 to rotate. Under the meshing action, the bevel gear A 26 and the drive shaft A 24 are further driven to rotate, thereby driving the generator 20 to generate electricity, and the generated electric energy directly supplies power to the water pumping equipment (substations, power distribution stations and other facilities are provided in front of the water pumping equipment); when water pumping is required but the wind speed is too low or there is no wind, the drive shaft B 25 is disconnected from the rotating shaft 19 through the clutch B 23, and the crankshaft 17 is connected to the drive shaft A 24 through the clutch A 22. At this time, it is switched to the coupled power generation mode. The coupled drive assembly is started to make the crankshaft 17 rotate continuously, and the drive shaft A 24 can be directly driven to rotate through the clutch A 22, and then the generator 20 is driven to generate electricity to supply power to the water pumping equipment. Disconnecting the drive shaft B 25 and the rotating shaft 19 in this mode can avoid unnecessary load on the coupled drive assembly, and the vertical-axis impeller 18 and the rotating shaft 19 can also rotate freely.

[0031] As shown in Figure 1As shown in the figure, the air compression assembly includes a motor 28 and an air compressor 29. The output shaft of the motor 28 is connected to the input shaft of the air compressor 29, and the air outlet of the air compressor 29 is connected to the air storage tank 1 through a pipeline. When water pumping is not required, the drive shaft B25 can be connected to the rotating shaft 19 through the clutch B23, and the crankshaft 17 can be disconnected from the drive shaft A24 through the clutch A22. At this time, it is switched to the wind power generation mode. The vertical axis impeller 18, the rotating shaft 19, the clutch B23, the drive shaft B25, and the bevel gear B27 are driven by the wind energy. Under the meshing action, the bevel gear A26 and the drive shaft A24 are further driven to rotate, so as to drive the generator 20 to generate electricity. The generated electric energy is supplied to the motor 28 (substations, power distribution stations and other facilities are arranged at the front end of the motor 28), and then the air compressor 29 is driven by the motor 28 to compress air. The obtained high-pressure air is transported into the air storage tank 1 for storage.

[0032] 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 water pumping operation is not required, the wind power generation component can generate electricity, and the generated electric energy can supply power to the air compression component to compress air, and the compressed high-pressure air is stored in the air storage tank 1 for standby; when water pumping is needed but the wind speed is too low or there is no wind, the generator 20 can be driven to operate and generate electricity through the coupling drive component to temporarily supply power to the water pumping equipment. Therefore, the influence of the intermittency and fluctuation of the wind energy on the water pumping equipment can be eliminated, and the water supply guarantee level can be effectively improved. The coupling drive component is based on the principle of coupling drive of high-pressure air and buoyancy. The high-pressure air comes from the compressed air stored in the air storage tank 1 by the air compression component. Its gas volume and air pressure are less affected by the ambient temperature. The buoyancy liquid can also be selected as a suitable liquid resistant to low temperature. Under the alpine climate conditions, the coupling drive component can operate normally. Compared with the conventional battery energy storage form, it avoids problems such as short service life, high maintenance cost and environmental pollution after abandonment under the alpine climate conditions. Compared with other existing energy storage methods, it also has the characteristics of low cost, large capacity, transferable and strong environmental adaptability.

[0033] During specific implementation: As Figure 1 shown in the figure, a liquid injection port 30 and a liquid discharge port 31 are provided on the liquid tank 2. The liquid injection port 30 is used to inject the buoyancy liquid into the liquid tank 2. The installation height of the liquid injection port 30 is lower than the top position of the guide rod 8 and higher than the top position of the barrel body 3 when the barrel rises to the highest position, which is convenient for liquid injection and can avoid excessive injection of the buoyancy liquid so that the liquid level exceeds the top of the guide rod 8 and blocks the exhaust passage 13 on the guide rod 8; the liquid discharge port 31 is arranged close to the bottom of the liquid tank 2. In the case of replacing the buoyancy liquid or when transfer and movement are required, the buoyancy liquid in the liquid tank 2 can be discharged through the liquid discharge port 31.

[0034] As Figure 5 、 Figure 6As shown in the figure, an air intake section 32 and an exhaust section 33 are machined on the guide rod 8. The diameters of both the air intake section 32 and the exhaust section 33 are smaller than the diameter of the guide rod 8, such that annular cavities with a certain axial length are formed inside the sleeve 5 at the positions of the air intake section 32 and the exhaust section 33. An air intake hole 14 is provided on the air intake section 32, and an exhaust hole 15 is provided on the exhaust section 33. Since the above-mentioned annular cavities have a certain axial length, when the cylinder body descends to near the lowest position, the communication hole 16 is communicated with the air intake hole 14 through the annular cavity at the position of the air intake section 32 to start inflation. In this inflated state, the cylinder body can continue to descend to the lowest position under the drive of the movement inertia and other drive units. On the contrary, when the cylinder body ascends to near the highest position, the communication hole 16 is communicated with the exhaust hole 15 through the annular cavity at the position of the exhaust section 33 to start exhaust. In this exhaust state, the cylinder body can continue to ascend to the highest position under the drive of the movement inertia and other drive units. Thus, the matching between the inflation and exhaust time inside the cylinder body and the overall lifting and lowering rhythm of the cylinder body is achieved.

[0035] As Figure 2 shown, an air distribution pipe 34 is provided outside the liquid tank 2. A plurality of air intake channels 12 are all communicated with the air distribution pipe 34. The air distribution pipe 34 is communicated with the gas storage tank 1. When the valve of the gas storage tank 1 is opened, the high-pressure gas in the gas storage tank 1 fills the air distribution pipe 34, and the air can be supplied to each air intake channel 12 simultaneously. A plurality of the above-mentioned gas storage tanks 1 can be provided, and each gas storage tank 1 can be used alternately, thereby increasing the gas storage capacity and prolonging the operation time of the coupling drive assembly.

[0036] As Figure 2 shown, a plurality of ventilation holes 35 are opened in the upper part of the liquid tank 2. The ventilation holes 35 are communicated with the inside of the liquid tank 2, and the ventilation holes 35 are used to discharge the high-pressure gas discharged from each cylinder body to the outside of the liquid tank 2.

[0037] As Figure 1 、 Figure 7 shown, the wind power generator assembly further includes a support pipe 36. One end of the support pipe 36 is fixedly connected to the gearbox 21, and the rotating shaft 19 is rotatably connected inside the support pipe 36. The support pipe 36 plays a supporting role for the rotating shaft 19 and the vertical axis impeller 18.

[0038] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the protection scope of the appended claims of the present invention.

Claims

1. Compressed air energy storage type wind power generation system, characterized in that, It includes a coupling drive assembly, and the coupling drive assembly includes an air storage tank and a liquid tank. A crankshaft and a number of drive units are arranged in the liquid tank, and each drive unit includes a cylinder body, 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, and the other end of the sleeve extends outside the other end of the cylinder body. A through hole is formed in the piston plate. The piston plate is arranged in the cylinder body. The outer periphery of the piston plate is slidably matched with the inner wall of the cylinder body. The through hole is slidably matched 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 both sides of the piston plate. Both ends of the guide rod are respectively machined with an air inlet channel and an air outlet channel along the axial direction inward. A number of air inlet holes and a number of air outlet holes are machined on the guide rod along the radial direction. The air inlet holes are communicated with the air inlet channel, and the air outlet holes are communicated with the air outlet channel. The guide rod is arranged in the sleeve and movably penetrates through the bottom plate. The guide rod is slidably matched with the sleeve. A number of communication holes are machined on the limiting platform along the radial direction. The air inlet holes and the air outlet holes are both matched with the communication holes. The crankshaft is horizontally arranged. Both ends of the crankshaft are rotatably connected to the liquid tank. One end of each of the several connecting rods away from the cylinder body is respectively rotatably connected to several crank pins on the crankshaft. The guide rod is vertically arranged. One end of the guide rod close to the air inlet channel penetrates 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, wherein, The drive unit further includes a sealing sleeve and a spring. The sealing sleeve is slidably sleeved on the guide rod. The sealing sleeve is matched with the air inlet hole. One end of the sealing sleeve is matched with 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.

3. The compressed air energy storage type wind power generation system according to claim 2, wherein It further includes a wind power generation assembly. The wind power generation assembly includes a vertical axis impeller, a rotating shaft, and a generator. The rotating shaft is vertically arranged, and the vertical axis impeller is fixedly connected to the top end of the rotating shaft. It further includes a conversion assembly. The conversion assembly includes a gearbox, a clutch A, and a clutch B. A drive shaft A and a drive shaft B are rotatably arranged in the gearbox. A bevel gear A is fixedly sleeved on the drive shaft A, and a bevel gear B is fixedly sleeved on the drive shaft B. The bevel gear A meshes with the bevel gear B. One end of the drive shaft A is connected to one end of the crankshaft through the clutch A. The other end of the drive shaft A is connected to the input shaft of the generator. The clutch A is used to connect or disconnect the drive shaft A and the crankshaft. One end of the drive shaft B is connected to the bottom end of the rotating shaft through the clutch B. The clutch B is used to connect or disconnect the drive 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 further includes an air compression assembly. The air compression assembly includes a motor and an air compressor. The output shaft of the motor is connected to the input shaft of the air compressor. The air outlet of the air compressor is communicated with the air storage tank through a pipeline.

5. The compressed air energy storage type wind power generation system according to claim 1, wherein A liquid injection port is provided on the liquid tank, and the installation height of the liquid injection port is lower than the top position of the guide rod.

6. The compressed air energy storage type wind power generation system according to claim 1, wherein 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 at the highest position.

7. The compressed air energy storage type wind power generation system according to claim 1, characterized in that The guide rod is processed with an air inlet section and an air exhaust section, the diameters of the air inlet section and the air exhaust section are both smaller than the diameter of the guide rod, the air inlet hole is arranged on the air inlet 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, wherein An air distribution pipe is arranged outside the liquid tank, and a plurality of the air inlet channels are communicated with the air distribution pipe, and the air distribution pipe is communicated with the gas storage tank.

9. The compressed air energy storage type wind power generation system according to claim 1, wherein A plurality of ventilation holes are provided in the upper part of the liquid tank, and the ventilation holes are communicated with the inside of the liquid tank.

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

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